AI Trajectory

Trajectory: (Expand/Collapse All)
Seq	Timestamp	Type	Name	Duration
0/0	2026/10/27 20:04	flow	patch-triage	4m Args: null Results: { "EnableConfigs": null, "FocusSymbols": [], "KMSANReasoning": "", "NeedsKMSAN": false, "Reasoning": "The patch modifies runtime PM and unbind/rebind handling in the Intel Sound Open Firmware (SOF) HDA codec driver (sound/soc/codecs/hdac_hda.c) and SOF codec initialization (sound/soc/sof/intel/hda-codec.c). This code is only reachable through the Intel SOF DSP driver stack, which requires physical Intel audio DSP hardware (e.g., Skylake, Tiger Lake, etc.) not emulated in standard QEMU or GCE virtualized environments (QEMU only emulates legacy ICH6/ICH9 controllers, which use the legacy snd-hda-intel driver instead of the SOF ASoC stack). As such, the modified code is structurally unreachable for fuzzing.", "WorthFuzzing": false }
1/1	2026/10/27 20:04	action	read-patch-diff	0m Args: null Results: { "PatchDiff": "commit 9023be7e0fb83b1ddb2bb244b2bfb9c4354c644c\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate: Tue Oct 27 20:04:49 2026 +0000\n\n syz-cluster: applied patch under review\n\ndiff --git a/sound/soc/codecs/hdac_hda.c b/sound/soc/codecs/hdac_hda.c\nindex 7414be08d3d5ba..fe5796cad1fff2 100644\n--- a/sound/soc/codecs/hdac_hda.c\n+++ b/sound/soc/codecs/hdac_hda.c\n@@ -435,6 +435,13 @@ static int hdac_hda_codec_probe(struct snd_soc_component component)\n \t\tgoto error_no_pm;\n \t}\n \n+\t/ The codec is in D0, the status is RPM_SUSPENDED after a previous unbind /\n+\tret = pm_runtime_set_active(\u0026hdev-\u003edev);\n+\tif (ret \u003c 0) {\n+\t\tdev_err(\u0026hdev-\u003edev, \"%s: failed to set runtime PM active %d\\n\", __func__, ret);\n+\t\tgoto error_no_pm;\n+\t}\n+\n #ifdef CONFIG_SND_HDA_PATCH_LOADER\n \tif (loadable_patch[hda_pvt-\u003edev_index] \u0026\u0026 loadable_patch[hda_pvt-\u003edev_index]) {\n \t\tconst struct firmware fw __free(firmware) = NULL;\n@@ -554,6 +561,7 @@ static void hdac_hda_codec_remove(struct snd_soc_component component)\n \t\treturn;\n \t}\n \n+\t/* prevent runtime PM callbacks while the link and the codec are torn down /\n \tpm_runtime_disable(\u0026hdev-\u003edev);\n \tsnd_hdac_ext_bus_link_put(hdev-\u003ebus, hlink);\n \n@@ -561,6 +569,9 @@ static void hdac_hda_codec_remove(struct snd_soc_component component)\n \t\tdriver-\u003eops-\u003eremove(codec);\n \n \tsnd_hda_codec_cleanup_for_unbind(codec);\n+\n+\t/* Balances the disable above, cleanup_for_unbind keeps runtime PM disabled /\n+\tpm_runtime_enable(\u0026hdev-\u003edev);\n }\n \n static const struct snd_soc_dapm_route hdac_hda_dapm_routes[] = {\n@@ -617,12 +628,35 @@ static const struct snd_soc_component_driver hdac_hda_hdmi_codec = {\n \t.endianness\t\t= 1,\n };\n \n+static void hdac_hda_restore_dev_type(void data)\n+{\n+\tstruct hdac_device hdev = data;\n+\n+\thdev-\u003etype = HDA_DEV_LEGACY;\n+}\n+\n static int hdac_hda_dev_probe(struct hdac_device hdev)\n {\n-\tstruct hdac_hda_priv hda_pvt = dev_get_drvdata(\u0026hdev-\u003edev);\n+\tstruct hdac_hda_priv hda_pvt;\n \tstruct hdac_ext_link hlink;\n \tint ret;\n \n+\thda_pvt = devm_kzalloc(\u0026hdev-\u003edev, sizeof(hda_pvt), GFP_KERNEL);\n+\tif (!hda_pvt)\n+\t\treturn -ENOMEM;\n+\n+\thda_pvt-\u003ecodec = dev_to_hda_codec(\u0026hdev-\u003edev);\n+\thda_pvt-\u003edev_index = hdev-\u003eaddr;\n+\t/* Intel iDisp (HDMI/DP) codec /\n+\tif (((hdev-\u003evendor_id \u003e\u003e 16) \u0026 0xFFFF) == 0x8086)\n+\t\thda_pvt-\u003eneed_display_power = true;\n+\tdev_set_drvdata(\u0026hdev-\u003edev, hda_pvt);\n+\n+\t/ Allow the legacy codec driver to match again after unbind /\n+\tret = devm_add_action(\u0026hdev-\u003edev, hdac_hda_restore_dev_type, hdev);\n+\tif (ret)\n+\t\treturn ret;\n+\n \t/ hold the ref while we probe /\n \thlink = snd_hdac_ext_bus_get_hlink_by_name(hdev-\u003ebus, dev_name(\u0026hdev-\u003edev));\n \tif (!hlink) {\ndiff --git a/sound/soc/sof/intel/hda-codec.c b/sound/soc/sof/intel/hda-codec.c\nindex 91f7ca22a4a7c8..a2b2ecf1e7e6d9 100644\n--- a/sound/soc/sof/intel/hda-codec.c\n+++ b/sound/soc/sof/intel/hda-codec.c\n@@ -15,8 +15,6 @@\n #include \"hda.h\"\n \n #if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC)\n-#include \"../../codecs/hdac_hda.h\"\n-\n #define CODEC_PROBE_RETRIES\t3\n \n #define IDISP_VID_INTEL\t0x80860000\n@@ -148,7 +146,6 @@ static struct hda_codec hda_codec_device_init(struct hdac_bus bus, int addr, i\n / probe individual codec /\n static int hda_codec_probe(struct snd_sof_dev sdev, int address)\n {\n-\tstruct hdac_hda_priv hda_priv;\n \tstruct hda_bus hbus = sof_to_hbus(sdev);\n \tstruct hda_codec codec;\n \tu32 hda_cmd = (address \u003c\u003c 28) \| (AC_NODE_ROOT \u003c\u003c 20) \|\n@@ -168,27 +165,15 @@ static int hda_codec_probe(struct snd_sof_dev sdev, int address)\n \tdev_dbg(sdev-\u003edev, \"HDA codec #%d probed OK: response: %x\\n\",\n \t\taddress, resp);\n \n-\thda_priv = devm_kzalloc(sdev-\u003edev, sizeof(*hda_priv), GFP_KERNEL);\n-\tif (!hda_priv)\n-\t\treturn -ENOMEM;\n-\n \tcodec = hda_codec_device_init(\u0026hbus-\u003ecore, address, HDA_DEV_LEGACY);\n \tret = PTR_ERR_OR_ZERO(codec);\n \tif (ret \u003c 0)\n \t\treturn ret;\n \n-\thda_priv-\u003ecodec = codec;\n-\thda_priv-\u003edev_index = address;\n-\tdev_set_drvdata(\u0026codec-\u003ecore.dev, hda_priv);\n-\n-\tif ((resp \u0026 0xFFFF0000) == IDISP_VID_INTEL) {\n-\t\tif (!hbus-\u003ecore.audio_component) {\n-\t\t\tdev_dbg(sdev-\u003edev,\n-\t\t\t\t\"iDisp hw present but no driver\\n\");\n-\t\t\tret = -ENOENT;\n-\t\t\tgoto out;\n-\t\t}\n-\t\thda_priv-\u003eneed_display_power = true;\n+\tif ((resp \u0026 0xFFFF0000) == IDISP_VID_INTEL \u0026\u0026 !hbus-\u003ecore.audio_component) {\n+\t\tdev_dbg(sdev-\u003edev, \"iDisp hw present but no driver\\n\");\n+\t\tret = -ENOENT;\n+\t\tgoto out;\n \t}\n \n \tif (is_generic_config(hbus))\n" }
2/1	2026/10/27 20:04	agent	patch-evaluator	4m Model: core Args: null Results: { "EnableConfigs": null, "FocusSymbols": [], "Reasoning": "The patch modifies runtime PM and unbind/rebind handling in the Intel Sound Open Firmware (SOF) HDA codec driver (sound/soc/codecs/hdac_hda.c) and SOF codec initialization (sound/soc/sof/intel/hda-codec.c). This code is only reachable through the Intel SOF DSP driver stack, which requires physical Intel audio DSP hardware (e.g., Skylake, Tiger Lake, etc.) not emulated in standard QEMU or GCE virtualized environments (QEMU only emulates legacy ICH6/ICH9 controllers, which use the legacy snd-hda-intel driver instead of the SOF ASoC stack). As such, the modified code is structurally unreachable for fuzzing.", "WorthFuzzing": false } Instruction: You are an expert Linux kernel maintainer and security engineer. Your job is to review a provided patch series and evaluate whether it warrants fuzzing with syzkaller. IMPORTANT: The changes have ALREADY been applied and committed as the HEAD commit in your workspace. Do NOT rely on internal assumptions. You must actively use your code access tools to inspect the actual source code, callers, and surrounding context. ================================================================================ 1. CORE TRIAGE PHILOSOPHY ================================================================================ The goal of patch fuzzing is to discover crashes, regressions, exposed latent bugs, and newly triggered assertions introduced by the patch series. - REACHABILITY IS THE PRIMARY GATE: Fuzzing can only discover bugs in code that can actually execute in standard virtualized environments (GCE or QEMU, utilizing software-emulated devices like USB gadgets, netdev, tun/tap). If the modified code is structurally unreachable (see Section 2), it MUST NOT be fuzzed, regardless of whether it adds assertions or complex logic. - DO NOT BLINDLY TRUST "NO FUNCTIONAL CHANGE" (NFCI) OR "REFACTORING" CLAIMS: Patch authors routinely label changes as "cleanups", "refactorings", or state "No functional change intended". Do NOT take these claims at face value. Code refactorings that rearrange logic, introduce helper functions, or alter state management in core subsystems frequently introduce subtle semantic shifts or uncover latent kernel bugs. If reachable executable code is modified or refactored, it MUST be fuzzed. - NEW OR MODIFIED ASSERTIONS IN REACHABLE CODE MUST BE FUZZED: When a patch introduces or modifies runtime checks or assertions (e.g., WARN_ON, VM_WARN_ON, BUG_ON, lockdep_assert) in reachable code paths, it enforces new or stricter invariants. Even if the author believes the invariant always holds, fuzzing is essential to verify whether an unusual sequence of operations can violate it. ================================================================================ 2. WHEN TO RETURN WorthFuzzing=false (NEGATIVE CRITERIA) ================================================================================ Return WorthFuzzing=false ONLY IF all modified code falls strictly into one or more of these categories: - Non-kernel and non-executable changes: * Modifications to Documentation/, comments, or spelling fixes. * User-space directories, self-tests, samples, or scripts (e.g., tools/, samples/, scripts/, usr/) that do not affect the compiled kernel image (vmlinux) or kernel modules. * Purely decorative logging (e.g., message strings in pr_err, printk, dev_info) or tracepoints that do not alter control flow or data structures. * Build system or Kconfig changes that do not alter compiled C logic. - Structurally unreachable hardware: * Vendor-specific PCIe switches, SmartNICs, or GPU drivers (e.g., mlxsw, pds_core, qed, ionic, amdgpu) requiring physical ASIC/PCIe cards not emulated in standard QEMU. - Unreachable execution paths: * Driver teardown callbacks (.remove, .shutdown, pci_unregister_driver) executed only during physical PCI hot-unplug or manual sysfs driver unbinding. * Code paths exclusive to architectures other than the target architecture. ================================================================================ 3. WHEN TO RETURN WorthFuzzing=true (POSITIVE CRITERIA) ================================================================================ Return WorthFuzzing=true whenever the patch touches reachable executable code, including: - Core Subsystems: * Any logic modifications in memory management (mm/), synchronization/locking (kernel/locking/), BPF, scheduler, core networking, VFS, or syscall handling. - Refactorings and Code Cleanups: * Any restructuring of reachable data structures, helper abstractions, or algorithm flows. - Runtime Assertions and Defensive Checks: * Any introduction or alteration of assertions (WARN_ON, VM_WARN_ON, BUG_ON, etc.) in reachable paths. - Reachable Drivers and Protocols: Drivers accessible via virtual buses (virtio, USB gadget, loopback, netlink, binder, sockets, etc.). ================================================================================ 4. EXTRACTING FocusSymbols (PREVENTING DILUTION) ================================================================================ When WorthFuzzing=true, you must extract specific kernel functions into FocusSymbols to guide the fuzzer: - AVOID UBIQUITOUS LIFECYCLE HOT-PATHS: Do NOT list generic, ubiquitous functions called by almost every program in the corpus (including, but not limited to: general memory allocators and deallocators, page fault and trap handlers, or core synchronization primitives; this is not an exhaustive list). Listing ubiquitous functions causes the fuzzer to classify thousands of unrelated tests as "focused", which severely dilutes fuzzing effort away from the actual changes. - TARGET SPECIFIC FEATURE LOGIC AND ENTRYPOINTS: List functions that specifically implement the logic being added or altered, or direct API entrypoints for the subsystem feature under review. - HANDLING STATIC INLINE FUNCTIONS IN HEADERS (.h): Compiler-inlined static functions (such as static inlines in mm/.h or include/linux/.h) lack distinct symbol addresses in vmlinux and cannot be targeted directly by symbol coverage filters. If the changes are primarily in static inline helpers, identify non-static, feature-specific caller functions in .c files that exercise them (avoiding ubiquitous lifecycle wrappers). ================================================================================ 5. IDENTIFYING EnableConfigs ================================================================================ Identify any specific CONFIG_ options required to properly compile and reach the modified code: - Inspect Kconfig files and #ifdef guards; do not make assumptions. - Check "depends on" lines in Kconfig to include any non-standard parent subsystem configs needed. - Strip any 'CONFIG_' prefix (e.g., return "NET_IPV4" instead of "CONFIG_NET_IPV4"). Prefer calling several tools at the same time to save round-trips. Use set-results tool to provide results of the analysis. It must be called exactly once before the final reply. Ignore results of this tool. Prompt: Target architecture: amd64 For your convenience, here is the diff of the changes: commit 9023be7e0fb83b1ddb2bb244b2bfb9c4354c644c Author: syz-cluster <triage@syzkaller.com> Date: Tue Oct 27 20:04:49 2026 +0000 syz-cluster: applied patch under review diff --git a/sound/soc/codecs/hdac_hda.c b/sound/soc/codecs/hdac_hda.c index 7414be08d3d5ba..fe5796cad1fff2 100644 --- a/sound/soc/codecs/hdac_hda.c +++ b/sound/soc/codecs/hdac_hda.c @@ -435,6 +435,13 @@ static int hdac_hda_codec_probe(struct snd_soc_component component) goto error_no_pm; } + / The codec is in D0, the status is RPM_SUSPENDED after a previous unbind / + ret = pm_runtime_set_active(&hdev->dev); + if (ret < 0) { + dev_err(&hdev->dev, "%s: failed to set runtime PM active %d\n", __func__, ret); + goto error_no_pm; + } + #ifdef CONFIG_SND_HDA_PATCH_LOADER if (loadable_patch[hda_pvt->dev_index] && loadable_patch[hda_pvt->dev_index]) { const struct firmware fw __free(firmware) = NULL; @@ -554,6 +561,7 @@ static void hdac_hda_codec_remove(struct snd_soc_component component) return; } + /* prevent runtime PM callbacks while the link and the codec are torn down / pm_runtime_disable(&hdev->dev); snd_hdac_ext_bus_link_put(hdev->bus, hlink); @@ -561,6 +569,9 @@ static void hdac_hda_codec_remove(struct snd_soc_component component) driver->ops->remove(codec); snd_hda_codec_cleanup_for_unbind(codec); + + /* Balances the disable above, cleanup_for_unbind keeps runtime PM disabled / + pm_runtime_enable(&hdev->dev); } static const struct snd_soc_dapm_route hdac_hda_dapm_routes[] = { @@ -617,12 +628,35 @@ static const struct snd_soc_component_driver hdac_hda_hdmi_codec = { .endianness = 1, }; +static void hdac_hda_restore_dev_type(void data) +{ + struct hdac_device hdev = data; + + hdev->type = HDA_DEV_LEGACY; +} + static int hdac_hda_dev_probe(struct hdac_device hdev) { - struct hdac_hda_priv hda_pvt = dev_get_drvdata(&hdev->dev); + struct hdac_hda_priv hda_pvt; struct hdac_ext_link hlink; int ret; + hda_pvt = devm_kzalloc(&hdev->dev, sizeof(hda_pvt), GFP_KERNEL); + if (!hda_pvt) + return -ENOMEM; + + hda_pvt->codec = dev_to_hda_codec(&hdev->dev); + hda_pvt->dev_index = hdev->addr; + /* Intel iDisp (HDMI/DP) codec / + if (((hdev->vendor_id >> 16) & 0xFFFF) == 0x8086) + hda_pvt->need_display_power = true; + dev_set_drvdata(&hdev->dev, hda_pvt); + + / Allow the legacy codec driver to match again after unbind / + ret = devm_add_action(&hdev->dev, hdac_hda_restore_dev_type, hdev); + if (ret) + return ret; + / hold the ref while we probe / hlink = snd_hdac_ext_bus_get_hlink_by_name(hdev->bus, dev_name(&hdev->dev)); if (!hlink) { diff --git a/sound/soc/sof/intel/hda-codec.c b/sound/soc/sof/intel/hda-codec.c index 91f7ca22a4a7c8..a2b2ecf1e7e6d9 100644 --- a/sound/soc/sof/intel/hda-codec.c +++ b/sound/soc/sof/intel/hda-codec.c @@ -15,8 +15,6 @@ #include "hda.h" #if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC) -#include "../../codecs/hdac_hda.h" - #define CODEC_PROBE_RETRIES 3 #define IDISP_VID_INTEL 0x80860000 @@ -148,7 +146,6 @@ static struct hda_codec hda_codec_device_init(struct hdac_bus bus, int addr, i / probe individual codec / static int hda_codec_probe(struct snd_sof_dev sdev, int address) { - struct hdac_hda_priv hda_priv; struct hda_bus hbus = sof_to_hbus(sdev); struct hda_codec codec; u32 hda_cmd = (address << 28) \| (AC_NODE_ROOT << 20) \| @@ -168,27 +165,15 @@ static int hda_codec_probe(struct snd_sof_dev sdev, int address) dev_dbg(sdev->dev, "HDA codec #%d probed OK: response: %x\n", address, resp); - hda_priv = devm_kzalloc(sdev->dev, sizeof(*hda_priv), GFP_KERNEL); - if (!hda_priv) - return -ENOMEM; - codec = hda_codec_device_init(&hbus->core, address, HDA_DEV_LEGACY); ret = PTR_ERR_OR_ZERO(codec); if (ret < 0) return ret; - hda_priv->codec = codec; - hda_priv->dev_index = address; - dev_set_drvdata(&codec->core.dev, hda_priv); - - if ((resp & 0xFFFF0000) == IDISP_VID_INTEL) { - if (!hbus->core.audio_component) { - dev_dbg(sdev->dev, - "iDisp hw present but no driver\n"); - ret = -ENOENT; - goto out; - } - hda_priv->need_display_power = true; + if ((resp & 0xFFFF0000) == IDISP_VID_INTEL && !hbus->core.audio_component) { + dev_dbg(sdev->dev, "iDisp hw present but no driver\n"); + ret = -ENOENT; + goto out; } if (is_generic_config(hbus))
3/2	2026/10/27 20:04	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 4672 output: 28 thoughts: 939 Thoughts: Analyzing the Patch for Fuzzing Potential Okay, let's break this patch down and figure out if it's worth our time to fuzz. Two files have been touched: `sound/soc/codecs/hdac_hda.c` and `sound/soc/sof/intel/hda-codec.c`. I need to understand the implications of these changes. Looking at `sound/soc/codecs/hdac_hda.c`, it seems we have additions related to power management (`pm_runtime_set_active`, `pm_runtime_enable`), a function to restore a device type (`hdac_hda_restore_dev_type`), and a relocation of memory allocation for `hda_pvt`. Notably, the allocation now happens within `hdac_hda_dev_probe`. The code includes a check for Intel iDisp (HDMI/DP) codecs. Also, a `devm_add_action` call suggests a cleanup/restore mechanism. In `sound/soc/sof/intel/hda-codec.c`, the allocation of `hda_priv` is removed and the `IDISP_VID_INTEL` check has been simplified. Now, a quick context check is in order. `sound/soc/sof/intel/` indicates Sound Open Firmware for Intel DSP/HDA audio, and `sound/soc/codecs/hdac_hda.c` is an HD-audio codec driver within ASoC, built on top of HDAC. The critical question is reachability. Based on our fuzzing criteria (Syzkaller/virtualized environments), I need to determine if these components are reachable in standard QEMU/GCE setups. Specifically, am I dealing with hardware that is structurally unreachable in those environments? Section 2 and 3 of our rules dictate negative criteria for fuzzing. Are we looking at vendor-specific PCIe switches, or drivers tied to hardware that QEMU doesn't emulate well? The key here is whether Intel SOF or `hdac_hda` itself are accessible in standard QEMU/GCE. Does QEMU properly emulate the Intel SOF DSP? How is `sound/soc/codecs/hdac_hda.c` actually probed and used? Is it solely for SOF, or can it bind to standard HDA, USB, or potentially even be instantiated through a dummy/virtual device? I need to dig deeper into the code of `sound/soc/codecs/hdac_hda.c` to understand the binding mechanism.
4/2	2026/10/27 20:05	tool	grepper	0m Args: { "Expression": "hdac_hda", "PathPrefixes": [ "sound/" ] } Results: { "Output": "\nFull output is too long, showing 200 out of 252 lines.\nUse more precise expression or PathPrefixes if possible.\n\nNumber of matching lines per file (7 files in total):\nsound/soc/codecs/Makefile:1\nsound/soc/codecs/hdac_hda.c:69\nsound/soc/codecs/hdac_hda.h:4\nsound/soc/intel/boards/hda_dsp_common.c:2\nsound/soc/intel/boards/hda_dsp_common.h:1\nsound/soc/intel/boards/skl_hda_dsp_generic.c:2\nsound/soc/sof/intel/hda-bus.c:2\n\nsound/soc/codecs/Makefile=149=snd-soc-hdac-hdmi-y := hdac_hdmi.o\nsound/soc/codecs/Makefile:150:snd-soc-hdac-hda-y := hdac_hda.o\nsound/soc/codecs/Makefile-151-snd-soc-hda-codec-y := hda.o hda-dai.o\n--\nsound/soc/codecs/hdac_hda.c-4-/\nsound/soc/codecs/hdac_hda.c:5: hdac_hda.c - ASoC extensions to reuse the legacy HDA codec drivers\nsound/soc/codecs/hdac_hda.c-6- * with ASoC platform drivers. These APIs are called by the legacy HDA\n--\nsound/soc/codecs/hdac_hda.c-21-\nsound/soc/codecs/hdac_hda.c:22:#include \"hdac_hda.h\"\nsound/soc/codecs/hdac_hda.c-23-\n--\nsound/soc/codecs/hdac_hda.c=43=MODULE_PARM_DESC(patch, \"Patch file array for Intel HD audio interface. The array index is the codec address.\");\n--\nsound/soc/codecs/hdac_hda.c-45-\nsound/soc/codecs/hdac_hda.c:46:static int hdac_hda_dai_open(struct snd_pcm_substream substream,\nsound/soc/codecs/hdac_hda.c-47-\t\t\t struct snd_soc_dai dai);\nsound/soc/codecs/hdac_hda.c:48:static void hdac_hda_dai_close(struct snd_pcm_substream substream,\nsound/soc/codecs/hdac_hda.c-49-\t\t\t struct snd_soc_dai dai);\nsound/soc/codecs/hdac_hda.c:50:static int hdac_hda_dai_prepare(struct snd_pcm_substream substream,\nsound/soc/codecs/hdac_hda.c-51-\t\t\t\tstruct snd_soc_dai dai);\nsound/soc/codecs/hdac_hda.c:52:static int hdac_hda_dai_hw_params(struct snd_pcm_substream substream,\nsound/soc/codecs/hdac_hda.c-53-\t\t\t\t struct snd_pcm_hw_params params,\nsound/soc/codecs/hdac_hda.c-54-\t\t\t\t struct snd_soc_dai dai);\nsound/soc/codecs/hdac_hda.c:55:static int hdac_hda_dai_hw_free(struct snd_pcm_substream substream,\nsound/soc/codecs/hdac_hda.c-56-\t\t\t\tstruct snd_soc_dai dai);\nsound/soc/codecs/hdac_hda.c:57:static int hdac_hda_dai_set_stream(struct snd_soc_dai dai, void stream,\nsound/soc/codecs/hdac_hda.c-58-\t\t\t\t int direction);\nsound/soc/codecs/hdac_hda.c:59:static struct hda_pcm snd_soc_find_pcm_from_dai(struct hdac_hda_priv hda_pvt,\nsound/soc/codecs/hdac_hda.c-60-\t\t\t\t\t\t struct snd_soc_dai dai);\nsound/soc/codecs/hdac_hda.c-61-\nsound/soc/codecs/hdac_hda.c:62:static const struct snd_soc_dai_ops hdac_hda_dai_ops = {\nsound/soc/codecs/hdac_hda.c:63:\t.startup = hdac_hda_dai_open,\nsound/soc/codecs/hdac_hda.c:64:\t.shutdown = hdac_hda_dai_close,\nsound/soc/codecs/hdac_hda.c:65:\t.prepare = hdac_hda_dai_prepare,\nsound/soc/codecs/hdac_hda.c:66:\t.hw_params = hdac_hda_dai_hw_params,\nsound/soc/codecs/hdac_hda.c:67:\t.hw_free = hdac_hda_dai_hw_free,\nsound/soc/codecs/hdac_hda.c:68:\t.set_stream = hdac_hda_dai_set_stream,\nsound/soc/codecs/hdac_hda.c-69-};\nsound/soc/codecs/hdac_hda.c-70-\nsound/soc/codecs/hdac_hda.c:71:static struct snd_soc_dai_driver hdac_hda_dais[] = {\nsound/soc/codecs/hdac_hda.c-72-{\n--\nsound/soc/codecs/hdac_hda.c-74-\t.name = \"Analog Codec DAI\",\nsound/soc/codecs/hdac_hda.c:75:\t.ops = \u0026hdac_hda_dai_ops,\nsound/soc/codecs/hdac_hda.c-76-\t.playback = {\n--\nsound/soc/codecs/hdac_hda.c-95-\t.name = \"Digital Codec DAI\",\nsound/soc/codecs/hdac_hda.c:96:\t.ops = \u0026hdac_hda_dai_ops,\nsound/soc/codecs/hdac_hda.c-97-\t.playback = {\n--\nsound/soc/codecs/hdac_hda.c-116-\t.name = \"Alt Analog Codec DAI\",\nsound/soc/codecs/hdac_hda.c:117:\t.ops = \u0026hdac_hda_dai_ops,\nsound/soc/codecs/hdac_hda.c-118-\t.playback = {\n--\nsound/soc/codecs/hdac_hda.c-136-\nsound/soc/codecs/hdac_hda.c:137:static struct snd_soc_dai_driver hdac_hda_hdmi_dais[] = {\nsound/soc/codecs/hdac_hda.c-138-{\n--\nsound/soc/codecs/hdac_hda.c-140-\t.name = \"intel-hdmi-hifi1\",\nsound/soc/codecs/hdac_hda.c:141:\t.ops = \u0026hdac_hda_dai_ops,\nsound/soc/codecs/hdac_hda.c-142-\t.playback = {\n--\nsound/soc/codecs/hdac_hda.c-153-\t.name = \"intel-hdmi-hifi2\",\nsound/soc/codecs/hdac_hda.c:154:\t.ops = \u0026hdac_hda_dai_ops,\nsound/soc/codecs/hdac_hda.c-155-\t.playback = {\n--\nsound/soc/codecs/hdac_hda.c-166-\t.name = \"intel-hdmi-hifi3\",\nsound/soc/codecs/hdac_hda.c:167:\t.ops = \u0026hdac_hda_dai_ops,\nsound/soc/codecs/hdac_hda.c-168-\t.playback = {\n--\nsound/soc/codecs/hdac_hda.c-179-\t.name = \"intel-hdmi-hifi4\",\nsound/soc/codecs/hdac_hda.c:180:\t.ops = \u0026hdac_hda_dai_ops,\nsound/soc/codecs/hdac_hda.c-181-\t.playback = {\n--\nsound/soc/codecs/hdac_hda.c-192-\nsound/soc/codecs/hdac_hda.c:193:static int hdac_hda_dai_set_stream(struct snd_soc_dai dai,\nsound/soc/codecs/hdac_hda.c-194-\t\t\t\t void stream, int direction)\n--\nsound/soc/codecs/hdac_hda.c-196-\tstruct snd_soc_component component = dai-\u003ecomponent;\nsound/soc/codecs/hdac_hda.c:197:\tstruct hdac_hda_priv hda_pvt;\nsound/soc/codecs/hdac_hda.c:198:\tstruct hdac_hda_pcm pcm;\nsound/soc/codecs/hdac_hda.c-199-\tstruct hdac_stream hstream;\n--\nsound/soc/codecs/hdac_hda.c-212-\nsound/soc/codecs/hdac_hda.c:213:static int hdac_hda_dai_hw_params(struct snd_pcm_substream substream,\nsound/soc/codecs/hdac_hda.c-214-\t\t\t\t struct snd_pcm_hw_params params,\n--\nsound/soc/codecs/hdac_hda.c-217-\tstruct snd_soc_component component = dai-\u003ecomponent;\nsound/soc/codecs/hdac_hda.c:218:\tstruct hdac_hda_priv hda_pvt;\nsound/soc/codecs/hdac_hda.c-219-\tunsigned int format_val;\n--\nsound/soc/codecs/hdac_hda.c-244-\nsound/soc/codecs/hdac_hda.c:245:static int hdac_hda_dai_hw_free(struct snd_pcm_substream substream,\nsound/soc/codecs/hdac_hda.c-246-\t\t\t\tstruct snd_soc_dai dai)\n--\nsound/soc/codecs/hdac_hda.c-248-\tstruct snd_soc_component component = dai-\u003ecomponent;\nsound/soc/codecs/hdac_hda.c:249:\tstruct hdac_hda_priv hda_pvt;\nsound/soc/codecs/hdac_hda.c-250-\tstruct hda_pcm_stream hda_stream;\n--\nsound/soc/codecs/hdac_hda.c-263-\nsound/soc/codecs/hdac_hda.c:264:static int hdac_hda_dai_prepare(struct snd_pcm_substream substream,\nsound/soc/codecs/hdac_hda.c-265-\t\t\t\tstruct snd_soc_dai dai)\n--\nsound/soc/codecs/hdac_hda.c-268-\tstruct hda_pcm_stream hda_stream;\nsound/soc/codecs/hdac_hda.c:269:\tstruct hdac_hda_priv hda_pvt;\nsound/soc/codecs/hdac_hda.c-270-\tunsigned int format_val;\n--\nsound/soc/codecs/hdac_hda.c-292-\nsound/soc/codecs/hdac_hda.c:293:static int hdac_hda_dai_open(struct snd_pcm_substream substream,\nsound/soc/codecs/hdac_hda.c-294-\t\t\t struct snd_soc_dai dai)\n--\nsound/soc/codecs/hdac_hda.c-296-\tstruct snd_soc_component component = dai-\u003ecomponent;\nsound/soc/codecs/hdac_hda.c:297:\tstruct hdac_hda_priv hda_pvt;\nsound/soc/codecs/hdac_hda.c-298-\tstruct hda_pcm_stream hda_stream;\n--\nsound/soc/codecs/hdac_hda.c-317-\nsound/soc/codecs/hdac_hda.c:318:static void hdac_hda_dai_close(struct snd_pcm_substream substream,\nsound/soc/codecs/hdac_hda.c-319-\t\t\t struct snd_soc_dai dai)\n--\nsound/soc/codecs/hdac_hda.c-321-\tstruct snd_soc_component component = dai-\u003ecomponent;\nsound/soc/codecs/hdac_hda.c:322:\tstruct hdac_hda_priv hda_pvt;\nsound/soc/codecs/hdac_hda.c-323-\tstruct hda_pcm_stream hda_stream;\n--\nsound/soc/codecs/hdac_hda.c-337-\nsound/soc/codecs/hdac_hda.c:338:static struct hda_pcm snd_soc_find_pcm_from_dai(struct hdac_hda_priv hda_pvt,\nsound/soc/codecs/hdac_hda.c-339-\t\t\t\t\t\t struct snd_soc_dai dai)\n--\nsound/soc/codecs/hdac_hda.c=392=static bool is_hdmi_codec(struct hda_codec hcodec)\n--\nsound/soc/codecs/hdac_hda.c-403-\nsound/soc/codecs/hdac_hda.c:404:static int hdac_hda_codec_probe(struct snd_soc_component component)\nsound/soc/codecs/hdac_hda.c-405-{\nsound/soc/codecs/hdac_hda.c:406:\tstruct hdac_hda_priv hda_pvt =\nsound/soc/codecs/hdac_hda.c-407-\t\t\tsnd_soc_component_get_drvdata(component);\n--\nsound/soc/codecs/hdac_hda.c-548-\nsound/soc/codecs/hdac_hda.c:549:static void hdac_hda_codec_remove(struct snd_soc_component component)\nsound/soc/codecs/hdac_hda.c-550-{\nsound/soc/codecs/hdac_hda.c:551:\tstruct hdac_hda_priv hda_pvt =\nsound/soc/codecs/hdac_hda.c-552-\t\t snd_soc_component_get_drvdata(component);\n--\nsound/soc/codecs/hdac_hda.c-576-\nsound/soc/codecs/hdac_hda.c:577:static const struct snd_soc_dapm_route hdac_hda_dapm_routes[] = {\nsound/soc/codecs/hdac_hda.c-578-\t{\"AIF1TX\", NULL, \"Codec Input Pin1\"},\n--\nsound/soc/codecs/hdac_hda.c-586-\nsound/soc/codecs/hdac_hda.c:587:static const struct snd_soc_dapm_widget hdac_hda_dapm_widgets[] = {\nsound/soc/codecs/hdac_hda.c-588-\t/ Audio Interface /\n--\nsound/soc/codecs/hdac_hda.c-612-\nsound/soc/codecs/hdac_hda.c:613:static const struct snd_soc_component_driver hdac_hda_codec = {\nsound/soc/codecs/hdac_hda.c:614:\t.probe\t\t\t= hdac_hda_codec_probe,\nsound/soc/codecs/hdac_hda.c:615:\t.remove\t\t\t= hdac_hda_codec_remove,\nsound/soc/codecs/hdac_hda.c:616:\t.dapm_widgets\t\t= hdac_hda_dapm_widgets,\nsound/soc/codecs/hdac_hda.c:617:\t.num_dapm_widgets\t= ARRAY_SIZE(hdac_hda_dapm_widgets),\nsound/soc/codecs/hdac_hda.c:618:\t.dapm_routes\t\t= hdac_hda_dapm_routes,\nsound/soc/codecs/hdac_hda.c:619:\t.num_dapm_routes\t= ARRAY_SIZE(hdac_hda_dapm_routes),\nsound/soc/codecs/hdac_hda.c-620-\t.idle_bias_on\t\t= false,\n--\nsound/soc/codecs/hdac_hda.c-623-\nsound/soc/codecs/hdac_hda.c:624:static const struct snd_soc_component_driver hdac_hda_hdmi_codec = {\nsound/soc/codecs/hdac_hda.c:625:\t.probe\t\t\t= hdac_hda_codec_probe,\nsound/soc/codecs/hdac_hda.c:626:\t.remove\t\t\t= hdac_hda_codec_remove,\nsound/soc/codecs/hdac_hda.c-627-\t.idle_bias_on\t\t= false,\n--\nsound/soc/codecs/hdac_hda.c-630-\nsound/soc/codecs/hdac_hda.c:631:static void hdac_hda_restore_dev_type(void data)\nsound/soc/codecs/hdac_hda.c-632-{\n--\nsound/soc/codecs/hdac_hda.c-637-\nsound/soc/codecs/hdac_hda.c:638:static int hdac_hda_dev_probe(struct hdac_device hdev)\nsound/soc/codecs/hdac_hda.c-639-{\nsound/soc/codecs/hdac_hda.c:640:\tstruct hdac_hda_priv hda_pvt;\nsound/soc/codecs/hdac_hda.c-641-\tstruct hdac_ext_link hlink;\n--\nsound/soc/codecs/hdac_hda.c-655-\t/ Allow the legacy codec driver to match again after unbind /\nsound/soc/codecs/hdac_hda.c:656:\tret = devm_add_action(\u0026hdev-\u003edev, hdac_hda_restore_dev_type, hdev);\nsound/soc/codecs/hdac_hda.c-657-\tif (ret)\n--\nsound/soc/codecs/hdac_hda.c-670-\t\tret = devm_snd_soc_register_component(\u0026hdev-\u003edev,\nsound/soc/codecs/hdac_hda.c:671:\t\t\t\t\t\t\u0026hdac_hda_hdmi_codec, hdac_hda_hdmi_dais,\nsound/soc/codecs/hdac_hda.c:672:\t\t\t\t\t\tARRAY_SIZE(hdac_hda_hdmi_dais));\nsound/soc/codecs/hdac_hda.c-673-\telse\nsound/soc/codecs/hdac_hda.c-674-\t\tret = devm_snd_soc_register_component(\u0026hdev-\u003edev,\nsound/soc/codecs/hdac_hda.c:675:\t\t\t\t\t\t\u0026hdac_hda_codec, hdac_hda_dais,\nsound/soc/codecs/hdac_hda.c:676:\t\t\t\t\t\tARRAY_SIZE(hdac_hda_dais));\nsound/soc/codecs/hdac_hda.c-677-\n--\nsound/soc/codecs/hdac_hda.c-685-\nsound/soc/codecs/hdac_hda.c:686:static int hdac_hda_dev_remove(struct hdac_device hdev)\nsound/soc/codecs/hdac_hda.c-687-{\nsound/soc/codecs/hdac_hda.c-688-\t/\nsound/soc/codecs/hdac_hda.c:689:\t Resources are freed in hdac_hda_codec_remove(). This\nsound/soc/codecs/hdac_hda.c-690-\t * function is kept to keep hda_codec_driver_remove() happy.\n--\nsound/soc/codecs/hdac_hda.c=695=static struct hdac_ext_bus_ops hdac_ops = {\nsound/soc/codecs/hdac_hda.c:696:\t.hdev_attach = hdac_hda_dev_probe,\nsound/soc/codecs/hdac_hda.c:697:\t.hdev_detach = hdac_hda_dev_remove,\nsound/soc/codecs/hdac_hda.c-698-};\n\n" }
5/2	2026/10/27 20:05	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 11661 output: 48 thoughts: 56 Thoughts: Okay, let's dive into this audio driver situation. My initial thought process goes something like this: Initial Investigation into HDA Audio Device Probe and Usage Alright, I need to figure out how `hdac_hda_dev_probe` functions and understand the overall usage of `snd-soc-hdac-hda`. My first move? I'm going to leverage my familiarity with the kernel source and start a search. Specifically, I want to see how these elements interact. I'll search the `sound/` directory for instances of both `hdac_ops` and `hdac_hda`. This should give me a good handle on the driver's operational structure, potential callback implementations, and how this whole module is orchestrated at a fundamental level. I'm expecting to find key structures and function pointers which define the interface this driver uses to interface with the High Definition Audio (HDA) controller. Knowing the operations the driver exposes will give me a solid foundation for further analysis.
6/2	2026/10/27 20:05	tool	grepper	0m Args: { "Expression": "snd-soc-hdac-hda\|hdac_ops\|SND_SOC_HDAC_HDA", "PathPrefixes": [ "sound/" ] } Results: { "Output": "sound/soc/codecs/Kconfig=14=config SND_SOC_ALL_CODECS\n--\nsound/soc/codecs/Kconfig-133-\timply SND_SOC_HDAC_HDMI\nsound/soc/codecs/Kconfig:134:\timply SND_SOC_HDAC_HDA\nsound/soc/codecs/Kconfig-135-\timply SND_SOC_ICS43432\n--\nsound/soc/codecs/Kconfig=1373=config SND_SOC_HDAC_HDMI\n--\nsound/soc/codecs/Kconfig-1378-\nsound/soc/codecs/Kconfig:1379:config SND_SOC_HDAC_HDA\nsound/soc/codecs/Kconfig-1380-\ttristate\n--\nsound/soc/codecs/Kconfig=1383=config SND_SOC_HDA\n--\nsound/soc/codecs/Kconfig-1388-\t This enables HD-Audio codec support in ASoC subsystem. Compared\nsound/soc/codecs/Kconfig:1389:\t to SND_SOC_HDAC_HDA, driver's behavior is identical to HD-Audio\nsound/soc/codecs/Kconfig-1390-\t legacy solution - including the dynamic resource allocation\n--\nsound/soc/codecs/Makefile=149=snd-soc-hdac-hdmi-y := hdac_hdmi.o\nsound/soc/codecs/Makefile:150:snd-soc-hdac-hda-y := hdac_hda.o\nsound/soc/codecs/Makefile-151-snd-soc-hda-codec-y := hda.o hda-dai.o\n--\nsound/soc/codecs/Makefile=597=obj-$(CONFIG_SND_SOC_HDAC_HDMI) += snd-soc-hdac-hdmi.o\nsound/soc/codecs/Makefile:598:obj-$(CONFIG_SND_SOC_HDAC_HDA) += snd-soc-hdac-hda.o\nsound/soc/codecs/Makefile-599-obj-$(CONFIG_SND_SOC_HDA) += snd-soc-hda-codec.o\n--\nsound/soc/codecs/hdac_hda.c=686=static int hdac_hda_dev_remove(struct hdac_device hdev)\n--\nsound/soc/codecs/hdac_hda.c-694-\nsound/soc/codecs/hdac_hda.c:695:static struct hdac_ext_bus_ops hdac_ops = {\nsound/soc/codecs/hdac_hda.c-696-\t.hdev_attach = hdac_hda_dev_probe,\n--\nsound/soc/codecs/hdac_hda.c=700=struct hdac_ext_bus_ops snd_soc_hdac_hda_get_ops(void)\nsound/soc/codecs/hdac_hda.c-701-{\nsound/soc/codecs/hdac_hda.c:702:\treturn \u0026hdac_ops;\nsound/soc/codecs/hdac_hda.c-703-}\n--\nsound/soc/intel/boards/Kconfig=315=config SND_SOC_INTEL_SKL_HDA_DSP_GENERIC_MACH\n--\nsound/soc/intel/boards/Kconfig-320-\tselect SND_SOC_DMIC\nsound/soc/intel/boards/Kconfig:321:\t# SND_SOC_HDAC_HDA is already selected\nsound/soc/intel/boards/Kconfig-322-\thelp\n--\nsound/soc/sof/intel/Kconfig=375=config SND_SOC_SOF_HDA\n--\nsound/soc/sof/intel/Kconfig-377-\tselect SND_HDA_EXT_CORE if SND_SOC_SOF_HDA_LINK\nsound/soc/sof/intel/Kconfig:378:\tselect SND_SOC_HDAC_HDA if SND_SOC_SOF_HDA_AUDIO_CODEC\nsound/soc/sof/intel/Kconfig-379-\thelp\n" }
7/2	2026/10/27 20:05	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 13029 output: 36 thoughts: 22 Thoughts: Okay, let's dive into this code. Investigating the Callers of `snd_soc_hdac_hda_get_ops()` My immediate focus here is to understand the dependencies on `snd_soc_hdac_hda_get_ops()`. I need to figure out which other functions or modules within the sound subsystem are using this specific function. This will give me crucial insights into its purpose, its importance, and potentially, the impact of any changes to it. I'm essentially tracing the flow of execution, identifying the points of integration. Understanding the callers is the key to understanding the context.
8/2	2026/10/27 20:05	tool	grepper	0m Args: { "Expression": "snd_soc_hdac_hda_get_ops", "PathPrefixes": [ "sound/" ] } Results: { "Output": "sound/soc/codecs/hdac_hda.c=695=static struct hdac_ext_bus_ops hdac_ops = {\n--\nsound/soc/codecs/hdac_hda.c-699-\nsound/soc/codecs/hdac_hda.c:700:struct hdac_ext_bus_ops snd_soc_hdac_hda_get_ops(void)\nsound/soc/codecs/hdac_hda.c-701-{\n--\nsound/soc/codecs/hdac_hda.c-703-}\nsound/soc/codecs/hdac_hda.c:704:EXPORT_SYMBOL_GPL(snd_soc_hdac_hda_get_ops);\nsound/soc/codecs/hdac_hda.c-705-\n--\nsound/soc/codecs/hdac_hda.h=25=struct hdac_hda_priv {\n--\nsound/soc/codecs/hdac_hda.h-31-\nsound/soc/codecs/hdac_hda.h:32:struct hdac_ext_bus_ops snd_soc_hdac_hda_get_ops(void);\nsound/soc/codecs/hdac_hda.h-33-\n--\nsound/soc/sof/intel/hda-bus.c-19-#include \"../../codecs/hdac_hda.h\"\nsound/soc/sof/intel/hda-bus.c:20:#define sof_hda_ext_ops\tsnd_soc_hdac_hda_get_ops()\nsound/soc/sof/intel/hda-bus.c-21-\n" }
9/2	2026/10/27 20:05	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 13650 output: 32 thoughts: 109 Thoughts: Here's my thought process, as requested: Investigating the `snd_soc_hdac_hda_get_ops` Function Okay, so I see that `snd_soc_hdac_hda_get_ops` is called within `sound/soc/sof/intel/hda-bus.c`. That seems like a good starting point. However, I know better than to jump to conclusions, particularly in this area. We're dealing with a complex subsystem here, and this function likely has broader implications. Let me take a more methodical approach. I need to be sure I've understood the function call within the larger system. I should also check `skl-hda-dsp-generic` and other files within `sound/soc/intel/boards/` to see if there's any usage beyond the initial reference. I have to make sure that the function isn't called, or potentially used, in a conditional manner. To make sure that I've exhausted this area of the code, I'll perform a more comprehensive search. I'll use `grep` to look for all instances of `hdac_ops`, `snd_soc_hdac_hda_get_ops`, and `hdac_hda` within the `sound/soc/intel` directory. This should reveal any other uses of the function, or related structures, ensuring I have a complete picture of its role and dependencies. Once I have the results, I can evaluate the broader implications.
10/2	2026/10/27 20:05	tool	grepper	0m Args: { "Expression": "hdac_hda", "PathPrefixes": [ "sound/soc/intel/" ] } Results: { "Output": "sound/soc/intel/boards/hda_dsp_common.c-9-#include \u003csound/hda_i915.h\u003e\nsound/soc/intel/boards/hda_dsp_common.c:10:#include \"../../codecs/hdac_hda.h\"\nsound/soc/intel/boards/hda_dsp_common.c-11-\n--\nsound/soc/intel/boards/hda_dsp_common.c=53=int hda_dsp_hdmi_build_controls(struct snd_soc_card card,\n--\nsound/soc/intel/boards/hda_dsp_common.c-55-{\nsound/soc/intel/boards/hda_dsp_common.c:56:\tstruct hdac_hda_priv hda_pvt;\nsound/soc/intel/boards/hda_dsp_common.c-57-\tstruct hda_codec hcodec;\n--\nsound/soc/intel/boards/hda_dsp_common.h-15-#include \u003csound/hda_i915.h\u003e\nsound/soc/intel/boards/hda_dsp_common.h:16:#include \"../../codecs/hdac_hda.h\"\nsound/soc/intel/boards/hda_dsp_common.h-17-\n--\nsound/soc/intel/boards/skl_hda_dsp_generic.c-16-#include \u003csound/soc-acpi.h\u003e\nsound/soc/intel/boards/skl_hda_dsp_generic.c:17:#include \"../../codecs/hdac_hda.h\"\nsound/soc/intel/boards/skl_hda_dsp_generic.c-18-#include \"../../sof/intel/hda.h\"\n--\nsound/soc/intel/boards/skl_hda_dsp_generic.c=28=static void skl_set_hda_codec_autosuspend_delay(struct snd_soc_card card)\n--\nsound/soc/intel/boards/skl_hda_dsp_generic.c-30-\tstruct snd_soc_pcm_runtime rtd;\nsound/soc/intel/boards/skl_hda_dsp_generic.c:31:\tstruct hdac_hda_priv hda_pvt;\nsound/soc/intel/boards/skl_hda_dsp_generic.c-32-\tstruct snd_soc_dai *dai;\n" }
11/2	2026/10/27 20:05	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 14708 output: 40 thoughts: 34 Thoughts: Okay, let's dive into this. I'm going to take a look at the `sound/soc/sof/intel/hda-bus.c` file. Specifically, I'm aiming to understand its purpose and how it functions. Let's start by getting a feel for the code around line 20. I usually begin by examining the surrounding context to grasp the general intent and see if any initial patterns emerge. From there, I can begin to grasp the overall structure of the file.
12/2	2026/10/27 20:05	tool	read-file	0m Args: { "File": "sound/soc/sof/intel/hda-bus.c", "FirstLine": 1, "LineCount": 80 } Results: { "Contents": " 1:\t// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)\n 2:\t//\n 3:\t// This file is provided under a dual BSD/GPLv2 license. When using or\n 4:\t// redistributing this file, you may do so under either license.\n 5:\t//\n 6:\t// Copyright(c) 2018 Intel Corporation\n 7:\t//\n 8:\t// Authors: Keyon Jie \u003cyang.jie@linux.intel.com\u003e\n 9:\t\n 10:\t#include \u003clinux/io.h\u003e\n 11:\t#include \u003csound/hdaudio.h\u003e\n 12:\t#include \u003csound/hda_i915.h\u003e\n 13:\t#include \u003csound/hda_codec.h\u003e\n 14:\t#include \u003csound/hda_register.h\u003e\n 15:\t#include \"../sof-priv.h\"\n 16:\t#include \"hda.h\"\n 17:\t\n 18:\t#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC)\n 19:\t#include \"../../codecs/hdac_hda.h\"\n 20:\t#define sof_hda_ext_ops\tsnd_soc_hdac_hda_get_ops()\n 21:\t\n 22:\tstatic void update_codec_wake_enable(struct hdac_bus bus, unsigned int addr, bool link_power)\n 23:\t{\n 24:\t\tunsigned int mask = snd_hdac_chip_readw(bus, WAKEEN);\n 25:\t\n 26:\t\tif (link_power)\n 27:\t\t\tmask \u0026= ~BIT(addr);\n 28:\t\telse\n 29:\t\t\tmask \|= BIT(addr);\n 30:\t\n 31:\t\tsnd_hdac_chip_updatew(bus, WAKEEN, STATESTS_INT_MASK, mask);\n 32:\t}\n 33:\t\n 34:\tstatic void sof_hda_bus_link_power(struct hdac_device codec, bool enable)\n 35:\t{\n 36:\t\tstruct hdac_bus bus = codec-\u003ebus;\n 37:\t\tbool oldstate = test_bit(codec-\u003eaddr, \u0026bus-\u003ecodec_powered);\n 38:\t\n 39:\t\tsnd_hdac_ext_bus_link_power(codec, enable);\n 40:\t\n 41:\t\tif (enable == oldstate)\n 42:\t\t\treturn;\n 43:\t\n 44:\t\t/\n 45:\t\t * Both codec driver and controller can hold references to\n 46:\t\t * display power. To avoid unnecessary power-up/down cycles,\n 47:\t\t * controller doesn't immediately release its reference.\n 48:\t\t \n 49:\t\t If the codec driver powers down the link, release\n 50:\t\t * the controller reference as well.\n 51:\t\t /\n 52:\t\tif (codec-\u003eaddr == HDA_IDISP_ADDR \u0026\u0026 !enable)\n 53:\t\t\tsnd_hdac_display_power(bus, HDA_CODEC_IDX_CONTROLLER, false);\n 54:\t\n 55:\t\t/ WAKEEN needs to be set for disabled links /\n 56:\t\tupdate_codec_wake_enable(bus, codec-\u003eaddr, enable);\n 57:\t}\n 58:\t\n 59:\tstatic const struct hdac_bus_ops bus_core_ops = {\n 60:\t\t.command = snd_hdac_bus_send_cmd,\n 61:\t\t.get_response = snd_hdac_bus_get_response,\n 62:\t\t.link_power = sof_hda_bus_link_power,\n 63:\t};\n 64:\t#endif\n 65:\t\n 66:\t/\n 67:\t * This can be used for both with/without hda link support.\n 68:\t /\n 69:\tvoid sof_hda_bus_init(struct snd_sof_dev sdev, struct device dev)\n 70:\t{\n 71:\t\tstruct hdac_bus bus = sof_to_bus(sdev);\n 72:\t\n 73:\t#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_LINK)\n 74:\t#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC)\n 75:\t\tconst struct sof_intel_dsp_desc *chip = get_chip_info(sdev-\u003epdata);\n 76:\t\n 77:\t\tsnd_hdac_ext_bus_init(bus, dev, \u0026bus_core_ops, sof_hda_ext_ops);\n 78:\t\n 79:\t\tif (chip \u0026\u0026 chip-\u003ehw_ip_version \u003e= SOF_INTEL_ACE_2_0)\n 80:\t\t\tbus-\u003euse_pio_for_commands = true;\n" }
13/2	2026/10/27 20:05	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 16162 output: 31 thoughts: 39 Thoughts: Okay, let's dive into this. Here's my thought process on the matter: Analyzing the Usage of `sof_hda_bus_init` Alright, I need to understand the scope of `sof_hda_bus_init`. My immediate question is: which devices are actually leveraging this specific function? I need to figure out where this function is employed. So, the first logical step is to pinpoint the function calls. Let's fire up a `grep` and search the codebase. That should give me a list of all the points where `sof_hda_bus_init` is invoked, and then I can start piecing together the broader context of its role within the system.
14/2	2026/10/27 20:05	tool	grepper	0m Args: { "Expression": "sof_hda_bus_init", "PathPrefixes": [ "sound/" ] } Results: { "Output": "sound/soc/sof/intel/hda-bus.c=59=static const struct hdac_bus_ops bus_core_ops = {\n--\nsound/soc/sof/intel/hda-bus.c-68- /\nsound/soc/sof/intel/hda-bus.c:69:void sof_hda_bus_init(struct snd_sof_dev sdev, struct device dev)\nsound/soc/sof/intel/hda-bus.c-70-{\n--\nsound/soc/sof/intel/hda-bus.c-101-}\nsound/soc/sof/intel/hda-bus.c:102:EXPORT_SYMBOL_NS(sof_hda_bus_init, \"SND_SOC_SOF_INTEL_HDA_COMMON\");\nsound/soc/sof/intel/hda-bus.c-103-\n--\nsound/soc/sof/intel/hda.c=503=static int hda_init(struct snd_sof_dev sdev)\n--\nsound/soc/sof/intel/hda.c-513-\t/* HDA bus init /\nsound/soc/sof/intel/hda.c:514:\tsof_hda_bus_init(sdev, \u0026pci-\u003edev);\nsound/soc/sof/intel/hda.c-515-\n--\nsound/soc/sof/intel/hda.h=802=void hda_dsp_ctrl_stop_chip(struct snd_sof_dev sdev);\n--\nsound/soc/sof/intel/hda.h-805- /\nsound/soc/sof/intel/hda.h:806:void sof_hda_bus_init(struct snd_sof_dev sdev, struct device dev);\nsound/soc/sof/intel/hda.h-807-void sof_hda_bus_exit(struct snd_sof_dev sdev);\n" }
15/2	2026/10/27 20:05	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 16872 output: 33 thoughts: 97 Thoughts: Analyzing the SOF HDA Initialization Okay, let's dive into this `hda_init` function within `sound/soc/sof/intel/hda.c`. Specifically, line 503 is calling `sof_hda_bus_init`, and it's passing in `sdev` and, crucially, `&pci->dev`. My immediate thought is, "Aha! `pci` must be a PCI device, right?" It's the PCI context. Now the question becomes, what PCI devices are we actually dealing with under the "intel" umbrella? The goal is to determine what device is being initialized. I need to understand which PCI devices are going to be handled by this code. Let's start by looking at those PCI files: `sound/soc/sof/intel/pci-*.c`. That should give me the PCI device IDs and any other distinguishing factors I need to see what's being managed here. Time to get the bigger picture!
16/2	2026/10/27 20:05	tool	grepper	0m Args: { "Expression": "pci_driver", "PathPrefixes": [ "sound/soc/sof/intel/" ] } Results: { "Output": "sound/soc/sof/intel/pci-apl.c=92=MODULE_DEVICE_TABLE(pci, sof_pci_ids);\nsound/soc/sof/intel/pci-apl.c-93-\nsound/soc/sof/intel/pci-apl.c:94:/* pci_driver definition /\nsound/soc/sof/intel/pci-apl.c:95:static struct pci_driver snd_sof_pci_intel_apl_driver = {\nsound/soc/sof/intel/pci-apl.c-96-\t.name = \"sof-audio-pci-intel-apl\",\n--\nsound/soc/sof/intel/pci-apl.c-104-};\nsound/soc/sof/intel/pci-apl.c:105:module_pci_driver(snd_sof_pci_intel_apl_driver);\nsound/soc/sof/intel/pci-apl.c-106-\n--\nsound/soc/sof/intel/pci-cnl.c=130=MODULE_DEVICE_TABLE(pci, sof_pci_ids);\nsound/soc/sof/intel/pci-cnl.c-131-\nsound/soc/sof/intel/pci-cnl.c:132:/ pci_driver definition /\nsound/soc/sof/intel/pci-cnl.c:133:static struct pci_driver snd_sof_pci_intel_cnl_driver = {\nsound/soc/sof/intel/pci-cnl.c-134-\t.name = \"sof-audio-pci-intel-cnl\",\n--\nsound/soc/sof/intel/pci-cnl.c-142-};\nsound/soc/sof/intel/pci-cnl.c:143:module_pci_driver(snd_sof_pci_intel_cnl_driver);\nsound/soc/sof/intel/pci-cnl.c-144-\n--\nsound/soc/sof/intel/pci-icl.c=95=MODULE_DEVICE_TABLE(pci, sof_pci_ids);\nsound/soc/sof/intel/pci-icl.c-96-\nsound/soc/sof/intel/pci-icl.c:97:/ pci_driver definition /\nsound/soc/sof/intel/pci-icl.c:98:static struct pci_driver snd_sof_pci_intel_icl_driver = {\nsound/soc/sof/intel/pci-icl.c-99-\t.name = \"sof-audio-pci-intel-icl\",\n--\nsound/soc/sof/intel/pci-icl.c-107-};\nsound/soc/sof/intel/pci-icl.c:108:module_pci_driver(snd_sof_pci_intel_icl_driver);\nsound/soc/sof/intel/pci-icl.c-109-\n--\nsound/soc/sof/intel/pci-lnl.c=66=MODULE_DEVICE_TABLE(pci, sof_pci_ids);\nsound/soc/sof/intel/pci-lnl.c-67-\nsound/soc/sof/intel/pci-lnl.c:68:/ pci_driver definition /\nsound/soc/sof/intel/pci-lnl.c:69:static struct pci_driver snd_sof_pci_intel_lnl_driver = {\nsound/soc/sof/intel/pci-lnl.c-70-\t.name = \"sof-audio-pci-intel-lnl\",\n--\nsound/soc/sof/intel/pci-lnl.c-78-};\nsound/soc/sof/intel/pci-lnl.c:79:module_pci_driver(snd_sof_pci_intel_lnl_driver);\nsound/soc/sof/intel/pci-lnl.c-80-\n--\nsound/soc/sof/intel/pci-mtl.c=128=MODULE_DEVICE_TABLE(pci, sof_pci_ids);\nsound/soc/sof/intel/pci-mtl.c-129-\nsound/soc/sof/intel/pci-mtl.c:130:/ pci_driver definition /\nsound/soc/sof/intel/pci-mtl.c:131:static struct pci_driver snd_sof_pci_intel_mtl_driver = {\nsound/soc/sof/intel/pci-mtl.c-132-\t.name = \"sof-audio-pci-intel-mtl\",\n--\nsound/soc/sof/intel/pci-mtl.c-140-};\nsound/soc/sof/intel/pci-mtl.c:141:module_pci_driver(snd_sof_pci_intel_mtl_driver);\nsound/soc/sof/intel/pci-mtl.c-142-\n--\nsound/soc/sof/intel/pci-nvl.c=95=MODULE_DEVICE_TABLE(pci, sof_pci_ids);\nsound/soc/sof/intel/pci-nvl.c-96-\nsound/soc/sof/intel/pci-nvl.c:97:/ pci_driver definition /\nsound/soc/sof/intel/pci-nvl.c:98:static struct pci_driver snd_sof_pci_intel_nvl_driver = {\nsound/soc/sof/intel/pci-nvl.c-99-\t.name = \"sof-audio-pci-intel-nvl\",\n--\nsound/soc/sof/intel/pci-nvl.c-107-};\nsound/soc/sof/intel/pci-nvl.c:108:module_pci_driver(snd_sof_pci_intel_nvl_driver);\nsound/soc/sof/intel/pci-nvl.c-109-\n--\nsound/soc/sof/intel/pci-ptl.c=96=MODULE_DEVICE_TABLE(pci, sof_pci_ids);\nsound/soc/sof/intel/pci-ptl.c-97-\nsound/soc/sof/intel/pci-ptl.c:98:/ pci_driver definition /\nsound/soc/sof/intel/pci-ptl.c:99:static struct pci_driver snd_sof_pci_intel_ptl_driver = {\nsound/soc/sof/intel/pci-ptl.c-100-\t.name = \"sof-audio-pci-intel-ptl\",\n--\nsound/soc/sof/intel/pci-ptl.c-108-};\nsound/soc/sof/intel/pci-ptl.c:109:module_pci_driver(snd_sof_pci_intel_ptl_driver);\nsound/soc/sof/intel/pci-ptl.c-110-\n--\nsound/soc/sof/intel/pci-skl.c=76=MODULE_DEVICE_TABLE(pci, sof_pci_ids);\nsound/soc/sof/intel/pci-skl.c-77-\nsound/soc/sof/intel/pci-skl.c:78:/ pci_driver definition /\nsound/soc/sof/intel/pci-skl.c:79:static struct pci_driver snd_sof_pci_intel_skl_driver = {\nsound/soc/sof/intel/pci-skl.c-80-\t.name = \"sof-audio-pci-intel-skl\",\n--\nsound/soc/sof/intel/pci-skl.c-88-};\nsound/soc/sof/intel/pci-skl.c:89:module_pci_driver(snd_sof_pci_intel_skl_driver);\nsound/soc/sof/intel/pci-skl.c-90-\n--\nsound/soc/sof/intel/pci-tgl.c=304=MODULE_DEVICE_TABLE(pci, sof_pci_ids);\nsound/soc/sof/intel/pci-tgl.c-305-\nsound/soc/sof/intel/pci-tgl.c:306:/ pci_driver definition /\nsound/soc/sof/intel/pci-tgl.c:307:static struct pci_driver snd_sof_pci_intel_tgl_driver = {\nsound/soc/sof/intel/pci-tgl.c-308-\t.name = \"sof-audio-pci-intel-tgl\",\n--\nsound/soc/sof/intel/pci-tgl.c-316-};\nsound/soc/sof/intel/pci-tgl.c:317:module_pci_driver(snd_sof_pci_intel_tgl_driver);\nsound/soc/sof/intel/pci-tgl.c-318-\n--\nsound/soc/sof/intel/pci-tng.c=231=MODULE_DEVICE_TABLE(pci, sof_pci_ids);\nsound/soc/sof/intel/pci-tng.c-232-\nsound/soc/sof/intel/pci-tng.c:233:/ pci_driver definition */\nsound/soc/sof/intel/pci-tng.c:234:static struct pci_driver snd_sof_pci_intel_tng_driver = {\nsound/soc/sof/intel/pci-tng.c-235-\t.name = \"sof-audio-pci-intel-tng\",\n--\nsound/soc/sof/intel/pci-tng.c-243-};\nsound/soc/sof/intel/pci-tng.c:244:module_pci_driver(snd_sof_pci_intel_tng_driver);\nsound/soc/sof/intel/pci-tng.c-245-\n" }
17/2	2026/10/27 20:05	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 19708 output: 36 thoughts: 267 Thoughts: My Investigation into QEMU's Audio Emulation and SOF Drivers Okay, so I'm looking at this `snd_sof_pci_intel__driver` file. These are clearly the Intel SOF PCI drivers, tailored for specific Intel platforms, like Apollo Lake, Cannon Lake, and the rest. The key question I need to answer right now is: does QEMU even emulate* Intel SOF, or does it focus on emulating the specific Intel DSP controllers that these drivers are built for? It's a critical distinction to understand. And that leads me to another vital question: what audio devices does QEMU actually emulate? I know the usual suspects: Intel HDA (with those specific ICH6 and ICH9 device IDs), AC97, ES1370, SB16, PC speaker, and virtio-snd. But here's the kicker, and this is where it gets interesting: when QEMU emulates the standard Intel HDA, does it leverage the SOF stack, using drivers like those in `sound/soc/sof/intel/`? Or does it stick with the legacy `sound/pci/hda/hda_intel.c` driver? This is important because it'll influence how the emulated sound behaves. I need to dig deeper. My next step will be to examine the PCI ID matching within `sound/soc/sof/intel/` and compare that to the PCI ID matching logic within `sound/pci/hda/hda_intel.c`. That should give me the definitive answer.
18/2	2026/10/27 20:05	tool	grepper	0m Args: { "Expression": "0x2668\|0x293e", "PathPrefixes": [ "sound/" ] } Results: { "Output": "sound/hda/codecs/realtek/alc880.c=353=static const struct hda_quirk alc880_fixup_tbl[] = {\n--\nsound/hda/codecs/realtek/alc880.c-404-\tSND_PCI_QUIRK(0x1695, 0x4012, \"EPox EP-5LDA\", ALC880_FIXUP_5ST_DIG),\nsound/hda/codecs/realtek/alc880.c:405:\tSND_PCI_QUIRK(0x2668, 0x8086, NULL, ALC880_FIXUP_6ST_DIG), /* broken BIOS /\nsound/hda/codecs/realtek/alc880.c:406:\tSND_PCI_QUIRK(0x8086, 0x2668, NULL, ALC880_FIXUP_6ST_DIG),\nsound/hda/codecs/realtek/alc880.c-407-\tSND_PCI_QUIRK(0x8086, 0xa100, \"Intel mobo\", ALC880_FIXUP_5ST_DIG),\n--\nsound/hda/codecs/sigmatel.c=1457=static const struct hda_quirk stac9200_fixup_tbl[] = {\nsound/hda/codecs/sigmatel.c-1458-\t/ SigmaTel reference board /\nsound/hda/codecs/sigmatel.c:1459:\tSND_PCI_QUIRK(PCI_VENDOR_ID_INTEL, 0x2668,\nsound/hda/codecs/sigmatel.c-1460-\t\t \"DFI LanParty\", STAC_REF),\n--\nsound/hda/codecs/sigmatel.c=1678=static const struct hda_quirk stac925x_fixup_tbl[] = {\nsound/hda/codecs/sigmatel.c-1679-\t/ SigmaTel reference board /\nsound/hda/codecs/sigmatel.c:1680:\tSND_PCI_QUIRK(PCI_VENDOR_ID_INTEL, 0x2668, \"DFI LanParty\", STAC_REF),\nsound/hda/codecs/sigmatel.c-1681-\tSND_PCI_QUIRK(PCI_VENDOR_ID_DFI, 0x3101, \"DFI LanParty\", STAC_REF),\n--\nsound/hda/codecs/sigmatel.c=1952=static const struct hda_quirk stac92hd73xx_fixup_tbl[] = {\nsound/hda/codecs/sigmatel.c-1953-\t/ SigmaTel reference board /\nsound/hda/codecs/sigmatel.c:1954:\tSND_PCI_QUIRK(PCI_VENDOR_ID_INTEL, 0x2668,\nsound/hda/codecs/sigmatel.c-1955-\t\t\t\t\"DFI LanParty\", STAC_92HD73XX_REF),\n--\nsound/hda/codecs/sigmatel.c=2748=static const struct hda_quirk stac92hd83xxx_fixup_tbl[] = {\nsound/hda/codecs/sigmatel.c-2749-\t/ SigmaTel reference board /\nsound/hda/codecs/sigmatel.c:2750:\tSND_PCI_QUIRK(PCI_VENDOR_ID_INTEL, 0x2668,\nsound/hda/codecs/sigmatel.c-2751-\t\t \"DFI LanParty\", STAC_92HD83XXX_REF),\n--\nsound/hda/codecs/sigmatel.c=3231=static const struct hda_quirk stac92hd71bxx_fixup_tbl[] = {\nsound/hda/codecs/sigmatel.c-3232-\t/ SigmaTel reference board /\nsound/hda/codecs/sigmatel.c:3233:\tSND_PCI_QUIRK(PCI_VENDOR_ID_INTEL, 0x2668,\nsound/hda/codecs/sigmatel.c-3234-\t\t \"DFI LanParty\", STAC_92HD71BXX_REF),\n--\nsound/hda/codecs/sigmatel.c=3635=static const struct hda_quirk stac922x_fixup_tbl[] = {\nsound/hda/codecs/sigmatel.c-3636-\t/ SigmaTel reference board /\nsound/hda/codecs/sigmatel.c:3637:\tSND_PCI_QUIRK(PCI_VENDOR_ID_INTEL, 0x2668,\nsound/hda/codecs/sigmatel.c-3638-\t\t \"DFI LanParty\", STAC_D945_REF),\n--\nsound/hda/codecs/sigmatel.c=3963=static const struct hda_quirk stac927x_fixup_tbl[] = {\nsound/hda/codecs/sigmatel.c-3964-\t/ SigmaTel reference board /\nsound/hda/codecs/sigmatel.c:3965:\tSND_PCI_QUIRK(PCI_VENDOR_ID_INTEL, 0x2668,\nsound/hda/codecs/sigmatel.c-3966-\t\t \"DFI LanParty\", STAC_D965_REF),\n--\nsound/hda/codecs/sigmatel.c=4173=static const struct hda_quirk stac9205_fixup_tbl[] = {\nsound/hda/codecs/sigmatel.c-4174-\t/ SigmaTel reference board */\nsound/hda/codecs/sigmatel.c:4175:\tSND_PCI_QUIRK(PCI_VENDOR_ID_INTEL, 0x2668,\nsound/hda/codecs/sigmatel.c-4176-\t\t \"DFI LanParty\", STAC_9205_REF),\n--\nsound/soc/mediatek/mt8189/mt8189-reg.h=13=enum {\n--\nsound/soc/mediatek/mt8189/mt8189-reg.h-9770-#define AFE_CONN047_1 0x2664\nsound/soc/mediatek/mt8189/mt8189-reg.h:9771:#define AFE_CONN047_2 0x2668\nsound/soc/mediatek/mt8189/mt8189-reg.h-9772-#define AFE_CONN047_4 0x2670\n--\nsound/soc/mediatek/mt8196/mt8196-reg.h=28=enum {\n--\nsound/soc/mediatek/mt8196/mt8196-reg.h-10409-#define AFE_CONN047_1 0x2664\nsound/soc/mediatek/mt8196/mt8196-reg.h:10410:#define AFE_CONN047_2 0x2668\nsound/soc/mediatek/mt8196/mt8196-reg.h-10411-#define AFE_CONN047_4 0x2670\n" }
19/2	2026/10/27 20:05	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 22311 output: 35 thoughts: 20 Thoughts: Okay, let's dive in. Analyzing Sound Driver Code Alright, I need to get to the bottom of this. Time to get my hands dirty. My instinct tells me to check the `sound/pci/hda/hda_intel.c` file. It's the most likely spot to find the core logic for Intel High Definition Audio on PCI buses, so this seems like the best place to start. Let's see what we can uncover.
20/2	2026/10/27 20:05	tool	grepper	0m Error: no matches Args: { "Expression": "0x2668", "PathPrefixes": [ "sound/pci/hda/" ] } Results: { "error": "no matches" }
21/2	2026/10/27 20:06	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 22481 output: 31 thoughts: 28 Thoughts: Here's my attempt at summarizing the thought process, tailored for an expert audience: Diving into the HDA Intel PCI ID Matching Okay, so I need to understand the PCI ID matching process for Intel HD Audio drivers. My initial thought is to dive straight into the code. Let's start with `sound/pci/hda/hda_intel.c`. I expect to find the core logic for how the driver identifies and binds to specific hardware configurations based on their PCI vendor and device IDs. I'm looking for the registration and probe functions, likely involving tables or structures that define these mappings. My goal is to understand the precedence and flexibility within the PCI ID matching; does it have any blacklisting, or how it addresses the issue of vendor-specific quirks/deviations in the same device family.
22/2	2026/10/27 20:06	tool	grepper	0m Error: no matches Args: { "Expression": "ICH6", "PathPrefixes": [ "sound/pci/hda/" ] } Results: { "error": "no matches" }
23/2	2026/10/27 20:06	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 22726 output: 33 thoughts: 15 Thoughts: Okay, here's my attempt at summarizing that thought process, keeping in mind the user is an expert: Navigating the HDA Codebase: PCI ID Panic Alright, I'm diving into the ALSA HDA driver code, and I need to find where the PCI device IDs are handled. My first thought is to check `sound/pci/hda/`, that's where I'd logically expect them to be. But wait a minute... where are they? This isn't immediately obvious, and that's slightly concerning. I know this code pretty well, but a moment of disorientation like this triggers a quick mental review of the directory structure. Perhaps they're abstracted differently this time. I need to quickly ascertain how the hardware identification is done to get a handle on the driver's target. Let me re-assess.
24/2	2026/10/27 20:06	tool	grepper	0m Error: no matches Args: { "Expression": "pci_driver", "PathPrefixes": [ "sound/pci/hda/" ] } Results: { "error": "no matches" }
25/2	2026/10/27 20:06	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 22969 output: 27 thoughts: 29 Thoughts: Okay, here's my interpretation of that thought process, from an expert's perspective: Hunting Down That Audio Driver Hmm, now where did I put that `hda_intel.c` file? I need to get into the details of the High Definition Audio Intel driver. Let's see... a quick mental scan doesn't reveal it immediately. Alright, no problem. Time to reach for a more powerful tool. Let's fire up `grepper` and search for "snd_hda_intel". That should pinpoint the location of the relevant source code quickly. I expect to be able to find it without too much trouble, and then I can dive into the nitty-gritty of that particular driver. Let's see what we come up with.
26/2	2026/10/27 20:06	tool	grepper	0m Args: { "Expression": "azx_probe", "PathPrefixes": [ "sound/" ] } Results: { "Output": "sound/hda/common/controller.c=1185=EXPORT_SYMBOL_GPL(azx_bus_init);\n--\nsound/hda/common/controller.c-1187-/* Probe codecs /\nsound/hda/common/controller.c:1188:int azx_probe_codecs(struct azx chip, unsigned int max_slots)\nsound/hda/common/controller.c-1189-{\n--\nsound/hda/common/controller.c-1241-}\nsound/hda/common/controller.c:1242:EXPORT_SYMBOL_GPL(azx_probe_codecs);\nsound/hda/common/controller.c-1243-\n--\nsound/hda/common/hda_controller.h=206=int azx_bus_init(struct azx chip, const char model);\nsound/hda/common/hda_controller.h:207:int azx_probe_codecs(struct azx chip, unsigned int max_slots);\nsound/hda/common/hda_controller.h-208-int azx_codec_configure(struct azx chip);\n--\nsound/hda/controllers/acpi.c=151=static void hda_acpi_probe_work(struct work_struct work)\n--\nsound/hda/controllers/acpi.c-160-\nsound/hda/controllers/acpi.c:161:\terr = azx_probe_codecs(chip, 8);\nsound/hda/controllers/acpi.c-162-\tif (err \u003c 0)\n--\nsound/hda/controllers/cix-ipbloq.c=62=static int cix_ipbloq_hda_probe_codec(struct cix_ipbloq_hda hda)\n--\nsound/hda/controllers/cix-ipbloq.c-70-\t/* create codec instances /\nsound/hda/controllers/cix-ipbloq.c:71:\terr = azx_probe_codecs(chip, 8);\nsound/hda/controllers/cix-ipbloq.c-72-\tif (err \u003c 0) {\n--\nsound/hda/controllers/intel.c=1177=static const struct dev_pm_ops azx_pm = {\n--\nsound/hda/controllers/intel.c-1186-\nsound/hda/controllers/intel.c:1187:static int azx_probe_continue(struct azx chip, bool free_on_error);\nsound/hda/controllers/intel.c-1188-\n--\nsound/hda/controllers/intel.c=1192=static void azx_vs_set_state(struct pci_dev pci,\n--\nsound/hda/controllers/intel.c-1213-\t\t\t\t \"Start delayed initialization\\n\");\nsound/hda/controllers/intel.c:1214:\t\t\tif (azx_probe_continue(chip, false) \u003c 0) {\nsound/hda/controllers/intel.c-1215-\t\t\t\thda-\u003einit_failed = 1;\n--\nsound/hda/controllers/intel.c=1700=static void azx_check_snoop_available(struct azx chip)\n--\nsound/hda/controllers/intel.c-1736-\nsound/hda/controllers/intel.c:1737:static void azx_probe_work(struct work_struct work)\nsound/hda/controllers/intel.c-1738-{\n--\nsound/hda/controllers/intel.c-1740-\nsound/hda/controllers/intel.c:1741:\tif (azx_probe_continue(\u0026hda-\u003echip, false) \u003c 0) {\nsound/hda/controllers/intel.c-1742-\t\thda-\u003einit_failed = 1;\n--\nsound/hda/controllers/intel.c=1785=static int azx_create(struct snd_card card, struct pci_dev pci,\n--\nsound/hda/controllers/intel.c-1859-\t/ continue probing in work context as may trigger request module /\nsound/hda/controllers/intel.c:1860:\tINIT_DELAYED_WORK(\u0026hda-\u003eprobe_work, azx_probe_work);\nsound/hda/controllers/intel.c-1861-\n--\nsound/hda/controllers/intel.c=2160=static DECLARE_BITMAP(probed_devs, SNDRV_CARDS);\nsound/hda/controllers/intel.c-2161-\nsound/hda/controllers/intel.c:2162:static int azx_probe(struct pci_dev pci,\nsound/hda/controllers/intel.c-2163-\t\t const struct pci_device_id pci_id)\n--\nsound/hda/controllers/intel.c=2358=static const unsigned int azx_max_codecs[AZX_NUM_DRIVERS] = {\n--\nsound/hda/controllers/intel.c-2362-\nsound/hda/controllers/intel.c:2363:static int azx_probe_continue(struct azx chip, bool free_on_error)\nsound/hda/controllers/intel.c-2364-{\n--\nsound/hda/controllers/intel.c-2397-\tif (bus-\u003ecodec_mask) {\nsound/hda/controllers/intel.c:2398:\t\terr = azx_probe_codecs(chip, azx_max_codecs[chip-\u003edriver_type]);\nsound/hda/controllers/intel.c-2399-\t\tif (err \u003c 0)\n--\nsound/hda/controllers/intel.c=2880=static struct pci_driver azx_driver = {\n--\nsound/hda/controllers/intel.c-2882-\t.id_table = azx_ids,\nsound/hda/controllers/intel.c:2883:\t.probe = azx_probe,\nsound/hda/controllers/intel.c-2884-\t.remove = azx_remove,\n--\nsound/hda/controllers/tegra.c=589=static void hda_tegra_probe_work(struct work_struct work)\n--\nsound/hda/controllers/tegra.c-601-\t/ create codec instances */\nsound/hda/controllers/tegra.c:602:\terr = azx_probe_codecs(chip, 8);\nsound/hda/controllers/tegra.c-603-\tif (err \u003c 0)\n" }
27/2	2026/10/27 20:06	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 24879 output: 42 thoughts: 112 Thoughts: Investigating the Intel HDA Codec Integration Okay, so the HDA controller code was just moved, right? Specifically, it's now living in `sound/hda/controllers/intel.c`. That's good to know. Now, my focus shifts to how the Software-defined Audio (SOF) Intel codec interacts with it. I need to understand the connection. First, I need to check `sound/soc/sof/intel/hda-codec.c`, and then, since that's likely using something more generic, I'll examine `sound/soc/codecs/hdac_hda.c`. Hang on... `hdac_hda`... what exactly is that? I'll bet it's a wrapper, or perhaps a lower-level abstraction. Let's dive into `sound/soc/codecs/hdac_hda.c`. I need to understand its role. I'll zero in on `hdac_hda_dev_probe`. That probe function should tell me, specifically, what driver it's acting as and how it's integrated with the other pieces. With that, I should be able to gain a clearer picture of how this all fits together.
28/2	2026/10/27 20:06	tool	read-file	0m Args: { "File": "sound/soc/codecs/hdac_hda.c", "FirstLine": 630, "LineCount": 90 } Results: { "Contents": " 630:\t\n 631:\tstatic void hdac_hda_restore_dev_type(void data)\n 632:\t{\n 633:\t\tstruct hdac_device hdev = data;\n 634:\t\n 635:\t\thdev-\u003etype = HDA_DEV_LEGACY;\n 636:\t}\n 637:\t\n 638:\tstatic int hdac_hda_dev_probe(struct hdac_device hdev)\n 639:\t{\n 640:\t\tstruct hdac_hda_priv hda_pvt;\n 641:\t\tstruct hdac_ext_link hlink;\n 642:\t\tint ret;\n 643:\t\n 644:\t\thda_pvt = devm_kzalloc(\u0026hdev-\u003edev, sizeof(hda_pvt), GFP_KERNEL);\n 645:\t\tif (!hda_pvt)\n 646:\t\t\treturn -ENOMEM;\n 647:\t\n 648:\t\thda_pvt-\u003ecodec = dev_to_hda_codec(\u0026hdev-\u003edev);\n 649:\t\thda_pvt-\u003edev_index = hdev-\u003eaddr;\n 650:\t\t/* Intel iDisp (HDMI/DP) codec /\n 651:\t\tif (((hdev-\u003evendor_id \u003e\u003e 16) \u0026 0xFFFF) == 0x8086)\n 652:\t\t\thda_pvt-\u003eneed_display_power = true;\n 653:\t\tdev_set_drvdata(\u0026hdev-\u003edev, hda_pvt);\n 654:\t\n 655:\t\t/ Allow the legacy codec driver to match again after unbind /\n 656:\t\tret = devm_add_action(\u0026hdev-\u003edev, hdac_hda_restore_dev_type, hdev);\n 657:\t\tif (ret)\n 658:\t\t\treturn ret;\n 659:\t\n 660:\t\t/ hold the ref while we probe /\n 661:\t\thlink = snd_hdac_ext_bus_get_hlink_by_name(hdev-\u003ebus, dev_name(\u0026hdev-\u003edev));\n 662:\t\tif (!hlink) {\n 663:\t\t\tdev_err(\u0026hdev-\u003edev, \"%s: hdac link not found\\n\", __func__);\n 664:\t\t\treturn -EIO;\n 665:\t\t}\n 666:\t\tsnd_hdac_ext_bus_link_get(hdev-\u003ebus, hlink);\n 667:\t\n 668:\t\t/ ASoC specific initialization /\n 669:\t\tif (hda_pvt-\u003eneed_display_power)\n 670:\t\t\tret = devm_snd_soc_register_component(\u0026hdev-\u003edev,\n 671:\t\t\t\t\t\t\t\u0026hdac_hda_hdmi_codec, hdac_hda_hdmi_dais,\n 672:\t\t\t\t\t\t\tARRAY_SIZE(hdac_hda_hdmi_dais));\n 673:\t\telse\n 674:\t\t\tret = devm_snd_soc_register_component(\u0026hdev-\u003edev,\n 675:\t\t\t\t\t\t\t\u0026hdac_hda_codec, hdac_hda_dais,\n 676:\t\t\t\t\t\t\tARRAY_SIZE(hdac_hda_dais));\n 677:\t\n 678:\t\tif (ret \u003c 0)\n 679:\t\t\tdev_err(\u0026hdev-\u003edev, \"%s: failed to register HDA codec %d\\n\", __func__, ret);\n 680:\t\n 681:\t\tsnd_hdac_ext_bus_link_put(hdev-\u003ebus, hlink);\n 682:\t\n 683:\t\treturn ret;\n 684:\t}\n 685:\t\n 686:\tstatic int hdac_hda_dev_remove(struct hdac_device hdev)\n 687:\t{\n 688:\t\t/\n 689:\t\t Resources are freed in hdac_hda_codec_remove(). This\n 690:\t\t * function is kept to keep hda_codec_driver_remove() happy.\n 691:\t\t /\n 692:\t\treturn 0;\n 693:\t}\n 694:\t\n 695:\tstatic struct hdac_ext_bus_ops hdac_ops = {\n 696:\t\t.hdev_attach = hdac_hda_dev_probe,\n 697:\t\t.hdev_detach = hdac_hda_dev_remove,\n 698:\t};\n 699:\t\n 700:\tstruct hdac_ext_bus_ops snd_soc_hdac_hda_get_ops(void)\n 701:\t{\n 702:\t\treturn \u0026hdac_ops;\n 703:\t}\n 704:\tEXPORT_SYMBOL_GPL(snd_soc_hdac_hda_get_ops);\n 705:\t\n 706:\tMODULE_LICENSE(\"GPL v2\");\n 707:\tMODULE_DESCRIPTION(\"ASoC Extensions for legacy HDA Drivers\");\n 708:\tMODULE_AUTHOR(\"Rakesh Ughreja\u003crakesh.a.ughreja@intel.com\u003e\");\n" }
29/2	2026/10/27 20:06	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 26661 output: 18 thoughts: 81 Thoughts: Okay, let's break this down. Analyzing the Audio Device Initialization Alright, so I'm looking at how this audio device gets initialized within the HD Audio subsystem. The key here is `snd_soc_hdac_hda_get_ops`, which, as I suspected, is the entry point. It's giving me a structure, `hdac_ops`, and that's the real meat of the matter. Let's see, it contains function pointers: `.hdev_attach` and `.hdev_detach`. I can see that `.hdev_attach` points to `hdac_hda_dev_probe`, which is likely where the actual device probing and initial setup happens. `.hdev_detach` points to `hdac_hda_dev_remove`. Now, I need to understand the control flow. The next question is: where exactly is `.hdev_attach` – and by extension, `hdac_hda_dev_probe` – being called? I'm going to quickly search the codebase to identify all locations where the function pointer `.hdev_attach` is used. That should give me the larger picture of how this device interacts with the overall system. That'll illuminate the full initialization process, from driver loading to hardware attachment.
30/2	2026/10/27 20:06	tool	grepper	0m Args: { "Expression": "hdev_attach" } Results: { "Output": "include/sound/hdaudio.h=259=struct hdac_ext_bus_ops {\ninclude/sound/hdaudio.h:260:\tint (hdev_attach)(struct hdac_device hdev);\ninclude/sound/hdaudio.h-261-\tint (hdev_detach)(struct hdac_device hdev);\n--\nsound/hda/common/bind.c=87=static int hda_codec_driver_probe(struct device dev)\n--\nsound/hda/common/bind.c-98-\tif (codec-\u003ebus-\u003ecore.ext_ops) {\nsound/hda/common/bind.c:99:\t\tif (WARN_ON(!codec-\u003ebus-\u003ecore.ext_ops-\u003ehdev_attach))\nsound/hda/common/bind.c-100-\t\t\treturn -EINVAL;\nsound/hda/common/bind.c:101:\t\treturn codec-\u003ebus-\u003ecore.ext_ops-\u003ehdev_attach(\u0026codec-\u003ecore);\nsound/hda/common/bind.c-102-\t}\n--\nsound/soc/codecs/hda.c=345=static struct snd_soc_dai_driver card_binder_dai = {\n--\nsound/soc/codecs/hda.c-349-\nsound/soc/codecs/hda.c:350:static int hda_hdev_attach(struct hdac_device hdev)\nsound/soc/codecs/hda.c-351-{\n--\nsound/soc/codecs/hda.c=394=const struct hdac_ext_bus_ops soc_hda_ext_bus_ops = {\nsound/soc/codecs/hda.c:395:\t.hdev_attach = hda_hdev_attach,\nsound/soc/codecs/hda.c-396-\t.hdev_detach = hda_hdev_detach,\n--\nsound/soc/codecs/hdac_hda.c=695=static struct hdac_ext_bus_ops hdac_ops = {\nsound/soc/codecs/hdac_hda.c:696:\t.hdev_attach = hdac_hda_dev_probe,\nsound/soc/codecs/hdac_hda.c-697-\t.hdev_detach = hdac_hda_dev_remove,\n" }
31/2	2026/10/27 20:06	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 27645 output: 26 thoughts: 137 Thoughts: Here's my thought process, as if I were analyzing that code snippet: Diving into the HDA Codec Driver Probe Okay, let's dissect this `sound/hda/common/bind.c` file and specifically, the `hda_codec_driver_probe` function. I see that within it, there's a conditional check: `if (codec->bus->core.ext_ops)`. My immediate thought is, "Aha, a hook for potentially external operations!" The code then proceeds with a check for `hdev_attach` within that `ext_ops` structure and then calls it if it exists. A potential area of interest. Now, I need to understand what's going on with this `codec->bus->core.ext_ops` field. Clearly, this `ext_ops` field is crucial. I need to know where it's initialized, where it's set. Therefore, I'm going to quickly use `grep` to trace all instances of `ext_ops` in this codebase. Understanding how `codec->bus->core.ext_ops` is assigned will provide key insights into the structure's purpose and functionality. This is where the core of the code, that I should inspect, likely lies.
32/2	2026/10/27 20:06	tool	grepper	0m Args: { "Expression": "ext_ops", "PathPrefixes": [ "sound/" ] } Results: { "Output": "\nFull output is too long, showing 200 out of 246 lines.\nUse more precise expression or PathPrefixes if possible.\n\nNumber of matching lines per file (22 files in total):\nsound/core/compress_offload.c:1\nsound/core/info.c:1\nsound/core/pcm.c:4\nsound/core/pcm_memory.c:2\nsound/firewire/bebob/bebob_proc.c:1\nsound/firewire/dice/dice-proc.c:1\nsound/firewire/digi00x/digi00x-proc.c:1\nsound/firewire/fireface/ff-proc.c:1\nsound/firewire/fireworks/fireworks_proc.c:1\nsound/firewire/motu/motu-proc.c:1\nsound/firewire/oxfw/oxfw-proc.c:1\nsound/firewire/tascam/tascam-proc.c:1\nsound/hda/codecs/hdmi/hdmi.c:1\nsound/hda/common/bind.c:6\nsound/hda/core/ext/bus.c:3\nsound/pci/ac97/ac97_proc.c:2\nsound/pci/cs46xx/dsp_spos.c:6\nsound/pci/cs46xx/dsp_spos_scb_lib.c:1\nsound/soc/codecs/hdmi-codec.c:1\nsound/soc/soc-topology.c:11\nsound/soc/sof/intel/hda-bus.c:2\nsound/soc/sof/topology.c:6\n\nsound/core/compress_offload.c=1546=static int snd_compress_proc_init(struct snd_compr compr)\n--\nsound/core/compress_offload.c-1561-\tif (entry)\nsound/core/compress_offload.c:1562:\t\tsnd_info_set_text_ops(entry, compr,\nsound/core/compress_offload.c-1563-\t\t\t\t snd_compress_proc_info_read);\n--\nsound/core/info.c=847=int snd_card_rw_proc_new(struct snd_card card, const char name,\n--\nsound/core/info.c-858-\t\treturn -ENOMEM;\nsound/core/info.c:859:\tsnd_info_set_text_ops(entry, private_data, read);\nsound/core/info.c-860-\tif (write) {\n--\nsound/core/pcm.c=494=static int snd_pcm_stream_proc_init(struct snd_pcm_str pstr)\n--\nsound/core/pcm.c-509-\tif (entry)\nsound/core/pcm.c:510:\t\tsnd_info_set_text_ops(entry, pstr, snd_pcm_stream_proc_info_read);\nsound/core/pcm.c-511-#ifdef CONFIG_SND_PCM_XRUN_DEBUG\n--\nsound/core/pcm.c-514-\tif (entry) {\nsound/core/pcm.c:515:\t\tsnd_info_set_text_ops(entry, pstr, snd_pcm_xrun_debug_read);\nsound/core/pcm.c-516-\t\tentry-\u003ec.text.write = snd_pcm_xrun_debug_write;\n--\nsound/core/pcm.c=531=create_substream_info_entry(struct snd_pcm_substream substream,\n--\nsound/core/pcm.c-540-\tif (entry)\nsound/core/pcm.c:541:\t\tsnd_info_set_text_ops(entry, substream, read);\nsound/core/pcm.c-542-\treturn entry;\n--\nsound/core/pcm.c=1189=static void snd_pcm_proc_init(void)\n--\nsound/core/pcm.c-1194-\tif (entry) {\nsound/core/pcm.c:1195:\t\tsnd_info_set_text_ops(entry, NULL, snd_pcm_proc_read);\nsound/core/pcm.c-1196-\t\tif (snd_info_register(entry) \u003c 0) {\n--\nsound/core/pcm_memory.c=233=static inline void preallocate_info_init(struct snd_pcm_substream substream)\n--\nsound/core/pcm_memory.c-239-\tif (entry) {\nsound/core/pcm_memory.c:240:\t\tsnd_info_set_text_ops(entry, substream,\nsound/core/pcm_memory.c-241-\t\t\t\t snd_pcm_lib_preallocate_proc_read);\n--\nsound/core/pcm_memory.c-247-\tif (entry)\nsound/core/pcm_memory.c:248:\t\tsnd_info_set_text_ops(entry, substream,\nsound/core/pcm_memory.c-249-\t\t\t\t snd_pcm_lib_preallocate_max_proc_read);\n--\nsound/firewire/bebob/bebob_proc.c=159=add_node(struct snd_bebob bebob, struct snd_info_entry root, const char name,\n--\nsound/firewire/bebob/bebob_proc.c-165-\tif (entry)\nsound/firewire/bebob/bebob_proc.c:166:\t\tsnd_info_set_text_ops(entry, bebob, op);\nsound/firewire/bebob/bebob_proc.c-167-}\n--\nsound/firewire/dice/dice-proc.c=279=static void add_node(struct snd_dice dice, struct snd_info_entry root,\n--\nsound/firewire/dice/dice-proc.c-287-\tif (entry)\nsound/firewire/dice/dice-proc.c:288:\t\tsnd_info_set_text_ops(entry, dice, op);\nsound/firewire/dice/dice-proc.c-289-}\n--\nsound/firewire/digi00x/digi00x-proc.c=68=void snd_dg00x_proc_init(struct snd_dg00x dg00x)\n--\nsound/firewire/digi00x/digi00x-proc.c-84-\tif (entry)\nsound/firewire/digi00x/digi00x-proc.c:85:\t\tsnd_info_set_text_ops(entry, dg00x, proc_read_clock);\nsound/firewire/digi00x/digi00x-proc.c-86-}\n--\nsound/firewire/fireface/ff-proc.c=35=static void add_node(struct snd_ff ff, struct snd_info_entry root,\n--\nsound/firewire/fireface/ff-proc.c-43-\tif (entry)\nsound/firewire/fireface/ff-proc.c:44:\t\tsnd_info_set_text_ops(entry, ff, op);\nsound/firewire/fireface/ff-proc.c-45-}\n--\nsound/firewire/fireworks/fireworks_proc.c=195=add_node(struct snd_efw efw, struct snd_info_entry root, const char name,\n--\nsound/firewire/fireworks/fireworks_proc.c-201-\tif (entry)\nsound/firewire/fireworks/fireworks_proc.c:202:\t\tsnd_info_set_text_ops(entry, efw, op);\nsound/firewire/fireworks/fireworks_proc.c-203-}\n--\nsound/firewire/motu/motu-proc.c=81=static void add_node(struct snd_motu motu, struct snd_info_entry root,\n--\nsound/firewire/motu/motu-proc.c-89-\tif (entry)\nsound/firewire/motu/motu-proc.c:90:\t\tsnd_info_set_text_ops(entry, motu, op);\nsound/firewire/motu/motu-proc.c-91-}\n--\nsound/firewire/oxfw/oxfw-proc.c=77=static void add_node(struct snd_oxfw oxfw, struct snd_info_entry root,\n--\nsound/firewire/oxfw/oxfw-proc.c-85-\tif (entry)\nsound/firewire/oxfw/oxfw-proc.c:86:\t\tsnd_info_set_text_ops(entry, oxfw, op);\nsound/firewire/oxfw/oxfw-proc.c-87-}\n--\nsound/firewire/tascam/tascam-proc.c=52=static void add_node(struct snd_tscm tscm, struct snd_info_entry root,\n--\nsound/firewire/tascam/tascam-proc.c-60-\tif (entry)\nsound/firewire/tascam/tascam-proc.c:61:\t\tsnd_info_set_text_ops(entry, tscm, op);\nsound/firewire/tascam/tascam-proc.c-62-}\n--\nsound/hda/codecs/hdmi/hdmi.c=304=static int eld_proc_new(struct hdmi_spec_per_pin per_pin, int index)\n--\nsound/hda/codecs/hdmi/hdmi.c-315-\nsound/hda/codecs/hdmi/hdmi.c:316:\tsnd_info_set_text_ops(entry, per_pin, print_eld_info);\nsound/hda/codecs/hdmi/hdmi.c-317-\tentry-\u003ec.text.write = write_eld_info;\n--\nsound/hda/common/bind.c=87=static int hda_codec_driver_probe(struct device dev)\n--\nsound/hda/common/bind.c-97-\nsound/hda/common/bind.c:98:\tif (codec-\u003ebus-\u003ecore.ext_ops) {\nsound/hda/common/bind.c:99:\t\tif (WARN_ON(!codec-\u003ebus-\u003ecore.ext_ops-\u003ehdev_attach))\nsound/hda/common/bind.c-100-\t\t\treturn -EINVAL;\nsound/hda/common/bind.c:101:\t\treturn codec-\u003ebus-\u003ecore.ext_ops-\u003ehdev_attach(\u0026codec-\u003ecore);\nsound/hda/common/bind.c-102-\t}\n--\nsound/hda/common/bind.c=159=static int hda_codec_driver_remove(struct device dev)\n--\nsound/hda/common/bind.c-167-\nsound/hda/common/bind.c:168:\tif (codec-\u003ebus-\u003ecore.ext_ops) {\nsound/hda/common/bind.c:169:\t\tif (WARN_ON(!codec-\u003ebus-\u003ecore.ext_ops-\u003ehdev_detach))\nsound/hda/common/bind.c-170-\t\t\treturn -EINVAL;\nsound/hda/common/bind.c:171:\t\treturn codec-\u003ebus-\u003ecore.ext_ops-\u003ehdev_detach(\u0026codec-\u003ecore);\nsound/hda/common/bind.c-172-\t}\n--\nsound/hda/core/ext/bus.c=18=MODULE_LICENSE(\"GPL v2\");\n--\nsound/hda/core/ext/bus.c-24- * @ops: bus verb operators\nsound/hda/core/ext/bus.c:25: * @ext_ops: operators used for ASoC HDA codec drivers\nsound/hda/core/ext/bus.c-26- \n--\nsound/hda/core/ext/bus.c=29=int snd_hdac_ext_bus_init(struct hdac_bus bus, struct device dev,\nsound/hda/core/ext/bus.c-30-\t\t\tconst struct hdac_bus_ops ops,\nsound/hda/core/ext/bus.c:31:\t\t\tconst struct hdac_ext_bus_ops ext_ops)\nsound/hda/core/ext/bus.c-32-{\n--\nsound/hda/core/ext/bus.c-38-\nsound/hda/core/ext/bus.c:39:\tbus-\u003eext_ops = ext_ops;\nsound/hda/core/ext/bus.c-40-\t/ FIXME:\n--\nsound/pci/ac97/ac97_proc.c=412=void snd_ac97_proc_init(struct snd_ac97 * ac97)\n--\nsound/pci/ac97/ac97_proc.c-424-\tif (entry)\nsound/pci/ac97/ac97_proc.c:425:\t\tsnd_info_set_text_ops(entry, ac97, snd_ac97_proc_read);\nsound/pci/ac97/ac97_proc.c-426-\tac97-\u003eproc = entry;\n--\nsound/pci/ac97/ac97_proc.c-430-\tif (entry) {\nsound/pci/ac97/ac97_proc.c:431:\t\tsnd_info_set_text_ops(entry, ac97, snd_ac97_proc_regs_read);\nsound/pci/ac97/ac97_proc.c-432-#ifdef CONFIG_SND_DEBUG\n--\nsound/pci/cs46xx/dsp_spos.c=776=int cs46xx_dsp_proc_init (struct snd_card card, struct snd_cs46xx chip)\n--\nsound/pci/cs46xx/dsp_spos.c-794-\tif (entry)\nsound/pci/cs46xx/dsp_spos.c:795:\t\tsnd_info_set_text_ops(entry, chip,\nsound/pci/cs46xx/dsp_spos.c-796-\t\t\t\t cs46xx_dsp_proc_symbol_table_read);\n--\nsound/pci/cs46xx/dsp_spos.c-800-\tif (entry)\nsound/pci/cs46xx/dsp_spos.c:801:\t\tsnd_info_set_text_ops(entry, chip,\nsound/pci/cs46xx/dsp_spos.c-802-\t\t\t\t cs46xx_dsp_proc_modules_read);\n--\nsound/pci/cs46xx/dsp_spos.c-806-\tif (entry)\nsound/pci/cs46xx/dsp_spos.c:807:\t\tsnd_info_set_text_ops(entry, chip,\nsound/pci/cs46xx/dsp_spos.c-808-\t\t\t\t cs46xx_dsp_proc_parameter_dump_read);\n--\nsound/pci/cs46xx/dsp_spos.c-812-\tif (entry)\nsound/pci/cs46xx/dsp_spos.c:813:\t\tsnd_info_set_text_ops(entry, chip,\nsound/pci/cs46xx/dsp_spos.c-814-\t\t\t\t cs46xx_dsp_proc_sample_dump_read);\n--\nsound/pci/cs46xx/dsp_spos.c-818-\tif (entry)\nsound/pci/cs46xx/dsp_spos.c:819:\t\tsnd_info_set_text_ops(entry, chip,\nsound/pci/cs46xx/dsp_spos.c-820-\t\t\t\t cs46xx_dsp_proc_task_tree_read);\n--\nsound/pci/cs46xx/dsp_spos.c-824-\tif (entry)\nsound/pci/cs46xx/dsp_spos.c:825:\t\tsnd_info_set_text_ops(entry, chip,\nsound/pci/cs46xx/dsp_spos.c-826-\t\t\t\t cs46xx_dsp_proc_scb_read);\n--\nsound/pci/cs46xx/dsp_spos_scb_lib.c=223=void cs46xx_dsp_proc_register_scb_desc (struct snd_cs46xx chip,\n--\nsound/pci/cs46xx/dsp_spos_scb_lib.c-245-\t\t\tscb_info-\u003escb_desc = scb;\nsound/pci/cs46xx/dsp_spos_scb_lib.c:246:\t\t\tsnd_info_set_text_ops(entry, scb_info,\nsound/pci/cs46xx/dsp_spos_scb_lib.c-247-\t\t\t\t\t cs46xx_dsp_proc_scb_info_read);\n--\nsound/soc/codecs/hdmi-codec.c=847=static int hdmi_dai_proc_new(struct hdmi_codec_priv hcp,\n--\nsound/soc/codecs/hdmi-codec.c-874-\nsound/soc/codecs/hdmi-codec.c:875:\tsnd_info_set_text_ops(entry, hcp, print_eld_info);\nsound/soc/codecs/hdmi-codec.c-876-\thcp-\u003eproc_entry = entry;\n--\nsound/soc/soc-topology.c=54=struct soc_tplg {\n--\nsound/soc/soc-topology.c-71-\t/* vendor specific bytes ext handlers, for TLV bytes controls /\nsound/soc/soc-topology.c:72:\tconst struct snd_soc_tplg_bytes_ext_ops bytes_ext_ops;\nsound/soc/soc-topology.c:73:\tint bytes_ext_ops_count;\nsound/soc/soc-topology.c-74-\n--\nsound/soc/soc-topology.c=463=static int soc_tplg_kcontrol_bind_io(struct snd_soc_tplg_ctl_hdr hdr,\n--\nsound/soc/soc-topology.c-467-\tconst struct snd_soc_tplg_kcontrol_ops ops;\nsound/soc/soc-topology.c:468:\tconst struct snd_soc_tplg_bytes_ext_ops *ext_ops;\nsound/soc/soc-topology.c-469-\tint num_ops, i;\n--\nsound/soc/soc-topology.c-498-\nsound/soc/soc-topology.c:499:\t\text_ops = tplg-\u003ebytes_ext_ops;\nsound/soc/soc-topology.c:500:\t\tnum_ops = tplg-\u003ebytes_ext_ops_count;\nsound/soc/soc-topology.c-501-\t\tfor (i = 0; i \u003c num_ops; i++) {\nsound/soc/soc-topology.c-502-\t\t\tif (!sbe-\u003eput \u0026\u0026\nsound/soc/soc-topology.c:503:\t\t\t ext_ops[i].id == le32_to_cpu(be-\u003eext_ops.put))\nsound/soc/soc-topology.c:504:\t\t\t\tsbe-\u003eput = ext_ops[i].put;\nsound/soc/soc-topology.c-505-\t\t\tif (!sbe-\u003eget \u0026\u0026\n\n" }
33/2	2026/10/27 20:06	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 33017 output: 33 thoughts: 59 Thoughts: Here's my thought process, as if I were analyzing this code: Analyzing the Initialization of an External HD-audio Bus Okay, so `snd_hdac_ext_bus_init` is crucial here. My immediate concern is the assignment: `bus->ext_ops = ext_ops;`. That's the heart of how an external bus interacts with the system, likely setting up function pointers for critical operations. I need to understand what `ext_ops` contains and how this bus is used. The key question now becomes, where is `snd_hdac_ext_bus_init` called? To find out, a quick `grep` for `snd_hdac_ext_bus_init` is in order. That will give me the call sites and, hopefully, reveal the overall initialization sequence and context for this external bus structure. Knowing the call context will greatly aid in quickly understanding the implications of assigning `ext_ops`.
34/2	2026/10/27 20:06	tool	grepper	0m Args: { "Expression": "snd_hdac_ext_bus_init", "PathPrefixes": [ "sound/" ] } Results: { "Output": "sound/hda/core/ext/bus.c=18=MODULE_LICENSE(\"GPL v2\");\n--\nsound/hda/core/ext/bus.c-20-/*\nsound/hda/core/ext/bus.c:21: snd_hdac_ext_bus_init - initialize a HD-audio extended bus\nsound/hda/core/ext/bus.c-22- * @bus: the pointer to HDAC bus object\n--\nsound/hda/core/ext/bus.c-28- /\nsound/hda/core/ext/bus.c:29:int snd_hdac_ext_bus_init(struct hdac_bus bus, struct device dev,\nsound/hda/core/ext/bus.c-30-\t\t\tconst struct hdac_bus_ops ops,\n--\nsound/hda/core/ext/bus.c-49-}\nsound/hda/core/ext/bus.c:50:EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_init);\nsound/hda/core/ext/bus.c-51-\n--\nsound/soc/intel/avs/core.c=391=static int avs_bus_init(struct avs_dev adev, struct pci_dev pci, const struct pci_device_id id)\n--\nsound/soc/intel/avs/core.c-409-\nsound/soc/intel/avs/core.c:410:\tret = snd_hdac_ext_bus_init(\u0026bus-\u003ecore, dev, NULL, \u0026soc_hda_ext_bus_ops);\nsound/soc/intel/avs/core.c-411-\tif (ret \u003c 0)\n--\nsound/soc/sof/intel/hda-bus.c=69=void sof_hda_bus_init(struct snd_sof_dev sdev, struct device *dev)\n--\nsound/soc/sof/intel/hda-bus.c-76-\nsound/soc/sof/intel/hda-bus.c:77:\tsnd_hdac_ext_bus_init(bus, dev, \u0026bus_core_ops, sof_hda_ext_ops);\nsound/soc/sof/intel/hda-bus.c-78-\n--\nsound/soc/sof/intel/hda-bus.c-81-#else\nsound/soc/sof/intel/hda-bus.c:82:\tsnd_hdac_ext_bus_init(bus, dev, NULL, NULL);\nsound/soc/sof/intel/hda-bus.c-83-#endif\n" }
35/2	2026/10/27 20:06	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 33966 output: 35 thoughts: 221 Thoughts: Okay, let me break this down. Understanding the Audio Driver Architecture Right, so `snd_hdac_ext_bus_init` is the key function here. I see it's called from two distinct locations in the kernel source, which is the immediate red flag. Let's make sure I'm following the code correctly. First, I've got `sound/soc/intel/avs/core.c`, which uses `&soc_hda_ext_bus_ops`. Now, this is important, this actually points to `sound/soc/codecs/hda.c`, which is the standard HDA codec interface, not `sound/soc/codecs/hdac_hda.c`. I'll want to remember that distinction. Second, I have `sound/soc/sof/intel/hda-bus.c`, and here we're using `sof_hda_ext_ops`, and that itself is calling `snd_soc_hdac_hda_get_ops()`. This means `hdac_hda.c` is explicitly, and only, part of the Intel SOF (Sound Open Firmware) subsystem. This is a very targeted usage and a clear distinction. Now I need to understand how the codec is being handled in SOF. I need to understand `sound/soc/sof/intel/hda-codec.c` and specifically `hda_codec_probe`, and where this function is called. The trace needs to be complete to evaluate the architecture.
36/2	2026/10/27 20:06	tool	grepper	0m Args: { "Expression": "hda_codec_probe", "PathPrefixes": [ "sound/soc/sof/intel/" ] } Results: { "Output": "sound/soc/sof/intel/hda-codec.c=131=static struct hda_codec hda_codec_device_init(struct hdac_bus bus, int addr, int type)\n--\nsound/soc/sof/intel/hda-codec.c-146-/* probe individual codec /\nsound/soc/sof/intel/hda-codec.c:147:static int hda_codec_probe(struct snd_sof_dev sdev, int address)\nsound/soc/sof/intel/hda-codec.c-148-{\n--\nsound/soc/sof/intel/hda-codec.c-201-/* Codec initialization /\nsound/soc/sof/intel/hda-codec.c:202:void hda_codec_probe_bus(struct snd_sof_dev sdev)\nsound/soc/sof/intel/hda-codec.c-203-{\n--\nsound/soc/sof/intel/hda-codec.c-216-\nsound/soc/sof/intel/hda-codec.c:217:\t\tret = hda_codec_probe(sdev, i);\nsound/soc/sof/intel/hda-codec.c-218-\t\tif (ret \u003c 0) {\n--\nsound/soc/sof/intel/hda-codec.c-224-}\nsound/soc/sof/intel/hda-codec.c:225:EXPORT_SYMBOL_NS_GPL(hda_codec_probe_bus, \"SND_SOC_SOF_HDA_AUDIO_CODEC\");\nsound/soc/sof/intel/hda-codec.c-226-\n--\nsound/soc/sof/intel/hda.c=621=static int hda_init_caps(struct snd_sof_dev sdev)\n--\nsound/soc/sof/intel/hda.c-679-\t/ create codec instances /\nsound/soc/sof/intel/hda.c:680:\thda_codec_probe_bus(sdev);\nsound/soc/sof/intel/hda.c-681-\n--\nsound/soc/sof/intel/hda.h=807=void sof_hda_bus_exit(struct snd_sof_dev sdev);\n--\nsound/soc/sof/intel/hda.h-812- /\nsound/soc/sof/intel/hda.h:813:void hda_codec_probe_bus(struct snd_sof_dev sdev);\nsound/soc/sof/intel/hda.h-814-void hda_codec_jack_wake_enable(struct snd_sof_dev sdev, bool enable);\n--\nsound/soc/sof/intel/hda.h=825=void hda_codec_device_remove(struct snd_sof_dev sdev);\n--\nsound/soc/sof/intel/hda.h-828-\nsound/soc/sof/intel/hda.h:829:static inline void hda_codec_probe_bus(struct snd_sof_dev sdev) { }\nsound/soc/sof/intel/hda.h-830-static inline void hda_codec_jack_wake_enable(struct snd_sof_dev sdev, bool enable) { }\n" }
37/2	2026/10/27 20:06	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 35385 output: 35 thoughts: 55 Thoughts: Here's my take on the thought process: Tracing the HDA Code Path Okay, so I'm trying to figure out the call flow here. I'm focusing on the `hda_codec_probe_bus` function, and it looks like that's being called by `hda_init_caps`. I recognize that function – it’s a key piece in the HDA initialization sequence within the SOF driver for Intel HDA codecs, specifically in `sound/soc/sof/intel/hda.c`. Now, I need to understand the larger context. The critical question is, where is `hda_init_caps` being invoked? That's the next logical step to trace back from `hda_codec_probe_bus` and understand what's triggering the codec probing. I need the full picture to see how this particular function fits into the overall audio initialization. Gotta go back up the call stack.
38/2	2026/10/27 20:06	tool	grepper	0m Args: { "Expression": "hda_init_caps", "PathPrefixes": [ "sound/soc/sof/intel/" ] } Results: { "Output": "sound/soc/sof/intel/hda.c=609=static int check_nhlt_ssp_mclk_mask(struct snd_sof_dev sdev, int ssp_num)\n--\nsound/soc/sof/intel/hda.c-620-\nsound/soc/sof/intel/hda.c:621:static int hda_init_caps(struct snd_sof_dev sdev)\nsound/soc/sof/intel/hda.c-622-{\n--\nsound/soc/sof/intel/hda.c=803=int hda_dsp_probe(struct snd_sof_dev sdev)\n--\nsound/soc/sof/intel/hda.c-905-\t/ init HDA capabilities */\nsound/soc/sof/intel/hda.c:906:\tret = hda_init_caps(sdev);\nsound/soc/sof/intel/hda.c-907-\tif (ret \u003c 0)\n" }
39/2	2026/10/27 20:06	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 35937 output: 40 thoughts: 69 Thoughts: Here's my take on those thoughts: SOF PCI Driver Investigation Okay, so `hda_dsp_probe` is called by those Intel SOF PCI drivers, and my initial question here is whether or not that SOF hardware is emulated within the QEMU environment. This is the crucial point for my work. To get to the bottom of this, I need to know what PCI device IDs the SOF drivers are designed to recognize. My next step is to examine the driver code itself. I'll need to dig into files like `sound/soc/sof/intel/pci-skl.c` and similar files to see the PCI ID matching logic. This is where the truth will lie. This is where I begin the analysis.
40/2	2026/10/27 20:06	tool	read-file	0m Args: { "File": "sound/soc/sof/intel/pci-skl.c", "FirstLine": 1, "LineCount": 95 } Results: { "Contents": " 1:\t// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)\n 2:\t//\n 3:\t// This file is provided under a dual BSD/GPLv2 license. When using or\n 4:\t// redistributing this file, you may do so under either license.\n 5:\t//\n 6:\t// Copyright(c) 2018-2022 Intel Corporation\n 7:\t//\n 8:\t\n 9:\t#include \u003clinux/module.h\u003e\n 10:\t#include \u003clinux/pci.h\u003e\n 11:\t#include \u003csound/soc-acpi.h\u003e\n 12:\t#include \u003csound/soc-acpi-intel-match.h\u003e\n 13:\t#include \u003csound/sof.h\u003e\n 14:\t#include \"../ops.h\"\n 15:\t#include \"../sof-pci-dev.h\"\n 16:\t\n 17:\t/* platform specific devices /\n 18:\t#include \"hda.h\"\n 19:\t\n 20:\tstatic struct sof_dev_desc skl_desc = {\n 21:\t\t.machines\t\t= snd_soc_acpi_intel_skl_machines,\n 22:\t\t.resindex_lpe_base\t= 0,\n 23:\t\t.resindex_pcicfg_base\t= -1,\n 24:\t\t.resindex_imr_base\t= -1,\n 25:\t\t.chip_info = \u0026skl_chip_info,\n 26:\t\t.irqindex_host_ipc\t= -1,\n 27:\t\t.ipc_supported_mask\t= BIT(SOF_IPC_TYPE_4),\n 28:\t\t.ipc_default\t\t= SOF_IPC_TYPE_4,\n 29:\t\t.dspless_mode_supported\t= true,\t\t/ Only supported for HDaudio /\n 30:\t\t.default_fw_path = {\n 31:\t\t\t[SOF_IPC_TYPE_4] = \"intel/avs/skl\",\n 32:\t\t},\n 33:\t\t.default_tplg_path = {\n 34:\t\t\t[SOF_IPC_TYPE_4] = \"intel/avs-tplg\",\n 35:\t\t},\n 36:\t\t.default_fw_filename = {\n 37:\t\t\t[SOF_IPC_TYPE_4] = \"dsp_basefw.bin\",\n 38:\t\t},\n 39:\t\t.nocodec_tplg_filename = \"sof-skl-nocodec.tplg\",\n 40:\t\t.ops = \u0026sof_skl_ops,\n 41:\t\t.ops_init = sof_skl_ops_init,\n 42:\t\t.ops_free = hda_ops_free,\n 43:\t};\n 44:\t\n 45:\tstatic struct sof_dev_desc kbl_desc = {\n 46:\t\t.machines\t\t= snd_soc_acpi_intel_kbl_machines,\n 47:\t\t.resindex_lpe_base\t= 0,\n 48:\t\t.resindex_pcicfg_base\t= -1,\n 49:\t\t.resindex_imr_base\t= -1,\n 50:\t\t.chip_info = \u0026skl_chip_info,\n 51:\t\t.irqindex_host_ipc\t= -1,\n 52:\t\t.ipc_supported_mask\t= BIT(SOF_IPC_TYPE_4),\n 53:\t\t.ipc_default\t\t= SOF_IPC_TYPE_4,\n 54:\t\t.dspless_mode_supported\t= true,\t\t/ Only supported for HDaudio /\n 55:\t\t.default_fw_path = {\n 56:\t\t\t[SOF_IPC_TYPE_4] = \"intel/avs/kbl\",\n 57:\t\t},\n 58:\t\t.default_tplg_path = {\n 59:\t\t\t[SOF_IPC_TYPE_4] = \"intel/avs-tplg\",\n 60:\t\t},\n 61:\t\t.default_fw_filename = {\n 62:\t\t\t[SOF_IPC_TYPE_4] = \"dsp_basefw.bin\",\n 63:\t\t},\n 64:\t\t.nocodec_tplg_filename = \"sof-kbl-nocodec.tplg\",\n 65:\t\t.ops = \u0026sof_skl_ops,\n 66:\t\t.ops_init = sof_skl_ops_init,\n 67:\t\t.ops_free = hda_ops_free,\n 68:\t};\n 69:\t\n 70:\t/ PCI IDs /\n 71:\tstatic const struct pci_device_id sof_pci_ids[] = {\n 72:\t\t{ PCI_DEVICE_DATA(INTEL, HDA_SKL_LP, \u0026skl_desc) },\n 73:\t\t{ PCI_DEVICE_DATA(INTEL, HDA_KBL_LP, \u0026kbl_desc) },\n 74:\t\t{ 0, }\n 75:\t};\n 76:\tMODULE_DEVICE_TABLE(pci, sof_pci_ids);\n 77:\t\n 78:\t/ pci_driver definition */\n 79:\tstatic struct pci_driver snd_sof_pci_intel_skl_driver = {\n 80:\t\t.name = \"sof-audio-pci-intel-skl\",\n 81:\t\t.id_table = sof_pci_ids,\n 82:\t\t.probe = hda_pci_intel_probe,\n 83:\t\t.remove = sof_pci_remove,\n 84:\t\t.shutdown = sof_pci_shutdown,\n 85:\t\t.driver = {\n 86:\t\t\t.pm = pm_ptr(\u0026sof_pci_pm),\n 87:\t\t},\n 88:\t};\n 89:\tmodule_pci_driver(snd_sof_pci_intel_skl_driver);\n 90:\t\n 91:\tMODULE_LICENSE(\"Dual BSD/GPL\");\n 92:\tMODULE_DESCRIPTION(\"SOF support for SkyLake platforms\");\n 93:\tMODULE_IMPORT_NS(\"SND_SOC_SOF_INTEL_HDA_GENERIC\");\n 94:\tMODULE_IMPORT_NS(\"SND_SOC_SOF_INTEL_HDA_COMMON\");\n 95:\tMODULE_IMPORT_NS(\"SND_SOC_SOF_PCI_DEV\");\n" }
41/2	2026/10/27 20:06	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 37834 output: 19 thoughts: 497 Thoughts: Assessing the Fuzzing Potential of Intel SOF DSP Hardware Okay, so I'm looking at this code and immediately see these specific Intel DSP hardware PCI IDs, like those for Skylake, Kaby Lake, etc. Right away, my mind goes to emulation. Does QEMU even emulate any of these specific devices? Hmm... standard QEMU seems to only emulate the ICH6/ICH9 HDA (using `sound/hda/controllers/intel.c` or legacy `sound/pci/hda/hda_intel.c`), AC97, and some other older or generic sound devices, but nothing that jumps out as an Intel SOF DSP. Wait a minute, can Syzkaller or QEMU emulate Intel SOF hardware at all? No, it looks like QEMU doesn't have an Intel SOF DSP device emulation at all. This might be a problem. Okay, time to check the negative criteria for fuzzing. We have to make sure we're not wasting time on code paths that are inherently unreachable. The core triage instructions are clear. I need to make sure the modified code doesn't fall into the category of Structurally unreachable hardware. In this case, this would specifically include vendor-specific PCIe hardware like this Intel SOF DSP. But wait! Can `hdac_hda.c` possibly be instantiated without this Intel SOF PCI hardware? That's the crucial question. I need to check every single place in the kernel that registers, instantiates, or references `hdac_hda`, or matches `snd-soc-hdac-hda`. I need to conduct a thorough search of the entire kernel for "snd-soc-hdac-hda", "hdac-hda", or any references to `hdac_hda` itself. This is the crucial step to determine if this is worth pursuing, or if this is truly a dead end.
42/2	2026/10/27 20:06	tool	grepper	0m Args: { "Expression": "hdac-hda" } Results: { "Output": "sound/soc/codecs/Makefile=149=snd-soc-hdac-hdmi-y := hdac_hdmi.o\nsound/soc/codecs/Makefile:150:snd-soc-hdac-hda-y := hdac_hda.o\nsound/soc/codecs/Makefile-151-snd-soc-hda-codec-y := hda.o hda-dai.o\n--\nsound/soc/codecs/Makefile=597=obj-$(CONFIG_SND_SOC_HDAC_HDMI) += snd-soc-hdac-hdmi.o\nsound/soc/codecs/Makefile:598:obj-$(CONFIG_SND_SOC_HDAC_HDA) += snd-soc-hdac-hda.o\nsound/soc/codecs/Makefile-599-obj-$(CONFIG_SND_SOC_HDA) += snd-soc-hda-codec.o\n" }
43/2	2026/10/27 20:07	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 39001 output: 23 thoughts: 21 Thoughts: Here's my thought process, summarized as you requested: Searching the Kernel for `snd_soc_hdac_hda` Okay, time to get to work. I need to understand this audio driver a bit better. My first step is to dive right into the kernel source code. Specifically, I'm going to perform a thorough search for the string `snd_soc_hdac_hda`. This isn't just a casual grep, I need to look across the entire kernel source tree – every single file. This approach ensures I find all instances of that specific module name, and the related functions. I'm expecting to identify the driver's core implementation files, any relevant header files, and possibly configuration settings or dependencies. By pinpointing the exact locations of the string, I should uncover the driver's critical elements, how they are interconnected, and gain a foothold in the code. I anticipate encountering the initialization routines, probe functions, and any associated audio codec interactions. Let's see what we find!
44/2	2026/10/27 20:07	tool	grepper	0m Args: { "Expression": "snd_soc_hdac_hda" } Results: { "Output": "sound/soc/codecs/hdac_hda.c=695=static struct hdac_ext_bus_ops hdac_ops = {\n--\nsound/soc/codecs/hdac_hda.c-699-\nsound/soc/codecs/hdac_hda.c:700:struct hdac_ext_bus_ops snd_soc_hdac_hda_get_ops(void)\nsound/soc/codecs/hdac_hda.c-701-{\n--\nsound/soc/codecs/hdac_hda.c-703-}\nsound/soc/codecs/hdac_hda.c:704:EXPORT_SYMBOL_GPL(snd_soc_hdac_hda_get_ops);\nsound/soc/codecs/hdac_hda.c-705-\n--\nsound/soc/codecs/hdac_hda.h=25=struct hdac_hda_priv {\n--\nsound/soc/codecs/hdac_hda.h-31-\nsound/soc/codecs/hdac_hda.h:32:struct hdac_ext_bus_ops snd_soc_hdac_hda_get_ops(void);\nsound/soc/codecs/hdac_hda.h-33-\n--\nsound/soc/sof/intel/hda-bus.c-19-#include \"../../codecs/hdac_hda.h\"\nsound/soc/sof/intel/hda-bus.c:20:#define sof_hda_ext_ops\tsnd_soc_hdac_hda_get_ops()\nsound/soc/sof/intel/hda-bus.c-21-\n" }
45/2	2026/10/27 20:07	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 39692 output: 40 thoughts: 110 Thoughts: Investigating the `hdac_hda.c` Code Okay, so I need to figure out how this `hdac_hda.c` driver is functioning within the sound subsystem. My initial instinct is to go straight to the git history, specifically the commit messages. I'd typically use `git log -n 5 sound/soc/codecs/hdac_hda.c` to see recent changes and the context behind them. Hmm, looks like I don't have that tool available right now. No problem, I can still glean insight. Since I don't have access to the git history, I'll go directly to the source code itself. Time to read the first hundred lines or so of `sound/soc/codecs/hdac_hda.c`. That should give me a good initial overview of the file's purpose, the initial setup, perhaps some key data structures, and the overall approach of the driver. Let's see what the comments reveal and how the initial function definitions are structured. I'm expecting to find the key function definitions, initialization routines, and register mappings that will define the core of this driver.
46/2	2026/10/27 20:07	tool	read-file	0m Args: { "File": "sound/soc/codecs/hdac_hda.c", "FirstLine": 1, "LineCount": 50 } Results: { "Contents": " 1:\t// SPDX-License-Identifier: GPL-2.0\n 2:\t// Copyright(c) 2015-18 Intel Corporation.\n 3:\t\n 4:\t/\n 5:\t hdac_hda.c - ASoC extensions to reuse the legacy HDA codec drivers\n 6:\t * with ASoC platform drivers. These APIs are called by the legacy HDA\n 7:\t * codec drivers using hdac_ext_bus_ops ops.\n 8:\t /\n 9:\t\n 10:\t#include \u003clinux/firmware.h\u003e\n 11:\t#include \u003clinux/init.h\u003e\n 12:\t#include \u003clinux/delay.h\u003e\n 13:\t#include \u003clinux/module.h\u003e\n 14:\t#include \u003clinux/pm_runtime.h\u003e\n 15:\t#include \u003csound/pcm_params.h\u003e\n 16:\t#include \u003csound/soc.h\u003e\n 17:\t#include \u003csound/hdaudio_ext.h\u003e\n 18:\t#include \u003csound/hda_i915.h\u003e\n 19:\t#include \u003csound/hda_codec.h\u003e\n 20:\t#include \u003csound/hda_register.h\u003e\n 21:\t\n 22:\t#include \"hdac_hda.h\"\n 23:\t\n 24:\t#define STUB_FORMATS\t(SNDRV_PCM_FMTBIT_S8 \| \\\n 25:\t\t\t\tSNDRV_PCM_FMTBIT_U8 \| \\\n 26:\t\t\t\tSNDRV_PCM_FMTBIT_S16_LE \| \\\n 27:\t\t\t\tSNDRV_PCM_FMTBIT_U16_LE \| \\\n 28:\t\t\t\tSNDRV_PCM_FMTBIT_S24_LE \| \\\n 29:\t\t\t\tSNDRV_PCM_FMTBIT_U24_LE \| \\\n 30:\t\t\t\tSNDRV_PCM_FMTBIT_S32_LE \| \\\n 31:\t\t\t\tSNDRV_PCM_FMTBIT_U32_LE \| \\\n 32:\t\t\t\tSNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE)\n 33:\t\n 34:\t#define STUB_HDMI_RATES\t(SNDRV_PCM_RATE_32000 \| SNDRV_PCM_RATE_44100 \|\\\n 35:\t\t\t\t\t SNDRV_PCM_RATE_48000 \| SNDRV_PCM_RATE_88200 \|\\\n 36:\t\t\t\t\t SNDRV_PCM_RATE_96000 \| SNDRV_PCM_RATE_176400 \|\\\n 37:\t\t\t\t\t SNDRV_PCM_RATE_192000)\n 38:\t\n 39:\t#ifdef CONFIG_SND_HDA_PATCH_LOADER\n 40:\tstatic char loadable_patch[HDA_MAX_CODECS];\n 41:\t\n 42:\tmodule_param_array_named(patch, loadable_patch, charp, NULL, 0444);\n 43:\tMODULE_PARM_DESC(patch, \"Patch file array for Intel HD audio interface. The array index is the codec address.\");\n 44:\t#endif\n 45:\t\n 46:\tstatic int hdac_hda_dai_open(struct snd_pcm_substream substream,\n 47:\t\t\t\t struct snd_soc_dai dai);\n 48:\tstatic void hdac_hda_dai_close(struct snd_pcm_substream substream,\n 49:\t\t\t\t struct snd_soc_dai dai);\n 50:\tstatic int hdac_hda_dai_prepare(struct snd_pcm_substream *substream,\n" }
47/2	2026/10/27 20:07	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 41046 output: 34 thoughts: 623 Thoughts: Decoding the Interaction Between Legacy HDA Codecs and ASoC Extensions Okay, let's break this down. My initial thought was: how do these legacy HDA codec drivers interact with the ASoC extensions? Specifically, those APIs mentioned in `hdac_hda.c`. The text points out that these are called using `hdac_ext_bus_ops ops`. Fine. So, I dove into `sound/hda/common/bind.c` to see how the probing happens. Ah, there it is! `hda_codec_driver_probe` is key. When a legacy driver probes a codec, it checks `codec->bus->core.ext_ops`. If that's set, it calls `hdev_attach` instead of the usual probe flow. Clever, this is a redirect! But who sets `bus->core.ext_ops`? That was the next question. I remembered we did a search for `snd_hdac_ext_bus_init` and `ext_ops` already. Let's see... the grep results narrow it down considerably. The ONLY place `bus->ext_ops` is assigned is in `sound/hda/core/ext/bus.c`, specifically within `snd_hdac_ext_bus_init`. It's set to whatever `ext_ops` is passed in. Now, who calls `snd_hdac_ext_bus_init`? Only two places, it seems: `sound/soc/intel/avs/core.c` and `sound/soc/sof/intel/hda-bus.c`. Critically, both of these use `snd_hdac_ext_bus_init` to initialize a bus with specific extended operations. In the first case, `&soc_hda_ext_bus_ops` is passed, and in the second case, `snd_soc_hdac_hda_get_ops()` is passed. Alright, so the focus shifts: who uses these two? `sound/soc/sof/intel/` is used by the Intel SOF PCI drivers, from `snd_sof_pci_intel_*`. And `sound/soc/intel/avs/`? Gotta check the AVS directory to understand the interaction there. It looks like AVS provides its own implementation. This seems to be the crucial linking point between the legacy HDA codecs and the ASoC framework, through those extension operations.
48/2	2026/10/27 20:07	tool	grepper	0m Args: { "Expression": "pci_driver", "PathPrefixes": [ "sound/soc/intel/avs/" ] } Results: { "Output": "sound/soc/intel/avs/core.c=953=MODULE_DEVICE_TABLE(pci, avs_ids);\nsound/soc/intel/avs/core.c-954-\nsound/soc/intel/avs/core.c:955:static struct pci_driver avs_pci_driver = {\nsound/soc/intel/avs/core.c-956-\t.name = KBUILD_MODNAME,\n--\nsound/soc/intel/avs/core.c-965-};\nsound/soc/intel/avs/core.c:966:module_pci_driver(avs_pci_driver);\nsound/soc/intel/avs/core.c-967-\n" }
49/2	2026/10/27 20:07	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 42428 output: 34 thoughts: 49 Thoughts: Okay, here's my take on those thoughts, tailored for an expert audience, and from a first-person perspective: Deep Dive on the avs_pci_driver Alright, so the `avs_pci_driver`… right, that's the one we're dealing with for Intel Audio Voice Subsystem, targeting those Skylake, Kaby Lake, Apollo Lake (and probably a few others) DSPs. My immediate thought is, "Let's confirm the PCI IDs". I need to be absolutely certain we're talking about the right hardware. The important thing now is to cross-reference with `avs_ids`. Need to check those device and subsystem IDs to make sure the driver correctly identifies the hardware and the devices we are working with are on the list for compatibility. Gotta make sure we're on the right track before we go too far down any rabbit holes. Checking `avs_ids` is the crucial next step.
50/2	2026/10/27 20:07	tool	grepper	0m Args: { "Expression": "avs_ids", "PathPrefixes": [ "sound/soc/intel/avs/" ] } Results: { "Output": "sound/soc/intel/avs/core.c=905=static const struct avs_spec fcl_desc = {\n--\nsound/soc/intel/avs/core.c-914-\nsound/soc/intel/avs/core.c:915:static const struct pci_device_id avs_ids[] = {\nsound/soc/intel/avs/core.c-916-\t{ PCI_DEVICE_DATA(INTEL, HDA_SKL_LP, \u0026skl_desc) },\n--\nsound/soc/intel/avs/core.c-952-};\nsound/soc/intel/avs/core.c:953:MODULE_DEVICE_TABLE(pci, avs_ids);\nsound/soc/intel/avs/core.c-954-\nsound/soc/intel/avs/core.c=955=static struct pci_driver avs_pci_driver = {\nsound/soc/intel/avs/core.c-956-\t.name = KBUILD_MODNAME,\nsound/soc/intel/avs/core.c:957:\t.id_table = avs_ids,\nsound/soc/intel/avs/core.c-958-\t.probe = avs_pci_probe,\n" }
51/2	2026/10/27 20:07	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 43046 output: 31 thoughts: 225 Thoughts: My Analysis of HDA Controller and SOF Driver Interactions Okay, so I'm digging into this audio driver situation and it's quickly becoming clear how things are structured. It seems the Advanced Virtual Sound (AVS) subsystem, specifically, isn't even touching `hdac_hda.c`. I mean, it's using `soc_hda_ext_bus_ops`, and that lives in `sound/soc/codecs/hda.c`. So, as far as I can tell, `hdac_hda.c` is exclusively used by the Intel Smart Sound Technology (SOF) driver, residing in `sound/soc/sof/intel/`. That’s the first important distinction. But then, the thought occurs to me: Could the standard legacy HDA controller somehow probe SOF? That's what I really need to check. No, wait, the legacy HDA driver...that's `sound/hda/controllers/intel.c` (formerly known as `sound/pci/hda/hda_intel.c`), and it uses `azx_bus_init`, not `snd_hdac_ext_bus_init`. It doesn't even bother setting `ext_ops`. So I'm thinking, this means that the standard HDA driver and SOF really are separate pieces. Hold on, let me just verify whether `hda_intel.c` or, the renamed, `sound/hda/controllers/intel.c` actually do set `ext_ops`. Best to be sure. I'll need to do a `grep` on `ext_ops` within that `sound/hda/controllers/` directory. That should be a quick way to confirm my impression.
52/2	2026/10/27 20:07	tool	grepper	0m Error: no matches Args: { "Expression": "ext_ops", "PathPrefixes": [ "sound/hda/controllers/" ] } Results: { "error": "no matches" }
53/2	2026/10/27 20:07	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 43700 output: 32 thoughts: 70 Thoughts: Here's my summary, as the expert: Investigating the Missing `ext_ops` in HDA Controller Sound Drivers Alright, I'm digging into this sound driver code and hitting a wall. Specifically, I'm not seeing any instances of `ext_ops` being set within the `sound/hda/controllers/` directory. That's a red flag. Typically, that structure is crucial for defining how the driver interacts with the hardware. I need to figure out where that's being initialized, or if I'm even looking in the right place. Wait a second… Could I be missing something? What about the `snd_soc_intel_skl_hda_dsp_generic_mach` driver? This architecture relies on SOC (System on a Chip) audio. I need to shift my focus and start looking at `sound/soc/intel/boards/skl_hda_dsp_generic.c` instead. It's time to check if the `ext_ops` are set in the board file rather than the controller itself. That's the likely scenario, considering the driver's generic nature and its use on an SOC.
54/2	2026/10/27 20:07	tool	grepper	0m Args: { "Expression": "platform_driver", "PathPrefixes": [ "sound/soc/intel/boards/" ] } Results: { "Output": "\nFull output is too long, showing 200 out of 261 lines.\nUse more precise expression or PathPrefixes if possible.\n\nNumber of matching lines per file (27 files in total):\nsound/soc/intel/boards/bdw-rt5650.c:2\nsound/soc/intel/boards/bdw-rt5677.c:2\nsound/soc/intel/boards/bdw_rt286.c:2\nsound/soc/intel/boards/bytcht_cx2072x.c:2\nsound/soc/intel/boards/bytcht_da7213.c:2\nsound/soc/intel/boards/bytcht_es8316.c:2\nsound/soc/intel/boards/bytcht_nocodec.c:2\nsound/soc/intel/boards/bytcr_rt5640.c:2\nsound/soc/intel/boards/bytcr_rt5651.c:2\nsound/soc/intel/boards/bytcr_wm5102.c:2\nsound/soc/intel/boards/cht_bsw_max98090_ti.c:2\nsound/soc/intel/boards/cht_bsw_nau8824.c:2\nsound/soc/intel/boards/cht_bsw_rt5645.c:2\nsound/soc/intel/boards/cht_bsw_rt5672.c:2\nsound/soc/intel/boards/cht_rt5677.c:2\nsound/soc/intel/boards/ehl_rt5660.c:2\nsound/soc/intel/boards/hsw_rt5640.c:2\nsound/soc/intel/boards/skl_hda_dsp_generic.c:2\nsound/soc/intel/boards/sof_cs42l42.c:2\nsound/soc/intel/boards/sof_da7219.c:2\nsound/soc/intel/boards/sof_es8336.c:2\nsound/soc/intel/boards/sof_nau8825.c:2\nsound/soc/intel/boards/sof_pcm512x.c:2\nsound/soc/intel/boards/sof_rt5682.c:2\nsound/soc/intel/boards/sof_sdw.c:2\nsound/soc/intel/boards/sof_ssp_amp.c:2\nsound/soc/intel/boards/sof_wm8804.c:2\n\nsound/soc/intel/boards/bdw-rt5650.c=285=static int bdw_rt5650_probe(struct platform_device pdev)\n--\nsound/soc/intel/boards/bdw-rt5650.c-320-\nsound/soc/intel/boards/bdw-rt5650.c:321:static struct platform_driver bdw_rt5650_audio = {\nsound/soc/intel/boards/bdw-rt5650.c-322-\t.probe = bdw_rt5650_probe,\n--\nsound/soc/intel/boards/bdw-rt5650.c-328-\nsound/soc/intel/boards/bdw-rt5650.c:329:module_platform_driver(bdw_rt5650_audio)\nsound/soc/intel/boards/bdw-rt5650.c-330-\n--\nsound/soc/intel/boards/bdw-rt5677.c=411=static int bdw_rt5677_probe(struct platform_device pdev)\n--\nsound/soc/intel/boards/bdw-rt5677.c-445-\nsound/soc/intel/boards/bdw-rt5677.c:446:static struct platform_driver bdw_rt5677_audio = {\nsound/soc/intel/boards/bdw-rt5677.c-447-\t.probe = bdw_rt5677_probe,\n--\nsound/soc/intel/boards/bdw-rt5677.c-453-\nsound/soc/intel/boards/bdw-rt5677.c:454:module_platform_driver(bdw_rt5677_audio)\nsound/soc/intel/boards/bdw-rt5677.c-455-\n--\nsound/soc/intel/boards/bdw_rt286.c=223=static int bdw_rt286_probe(struct platform_device pdev)\n--\nsound/soc/intel/boards/bdw_rt286.c-245-\nsound/soc/intel/boards/bdw_rt286.c:246:static struct platform_driver bdw_rt286_driver = {\nsound/soc/intel/boards/bdw_rt286.c-247-\t.probe = bdw_rt286_probe,\n--\nsound/soc/intel/boards/bdw_rt286.c-253-\nsound/soc/intel/boards/bdw_rt286.c:254:module_platform_driver(bdw_rt286_driver)\nsound/soc/intel/boards/bdw_rt286.c-255-\n--\nsound/soc/intel/boards/bytcht_cx2072x.c=228=static int snd_byt_cht_cx2072x_probe(struct platform_device pdev)\n--\nsound/soc/intel/boards/bytcht_cx2072x.c-285-\nsound/soc/intel/boards/bytcht_cx2072x.c:286:static struct platform_driver snd_byt_cht_cx2072x_driver = {\nsound/soc/intel/boards/bytcht_cx2072x.c-287-\t.driver = {\n--\nsound/soc/intel/boards/bytcht_cx2072x.c-291-};\nsound/soc/intel/boards/bytcht_cx2072x.c:292:module_platform_driver(snd_byt_cht_cx2072x_driver);\nsound/soc/intel/boards/bytcht_cx2072x.c-293-\n--\nsound/soc/intel/boards/bytcht_da7213.c=227=static int bytcht_da7213_probe(struct platform_device pdev)\n--\nsound/soc/intel/boards/bytcht_da7213.c-295-\nsound/soc/intel/boards/bytcht_da7213.c:296:static struct platform_driver bytcht_da7213_driver = {\nsound/soc/intel/boards/bytcht_da7213.c-297-\t.driver = {\n--\nsound/soc/intel/boards/bytcht_da7213.c-301-};\nsound/soc/intel/boards/bytcht_da7213.c:302:module_platform_driver(bytcht_da7213_driver);\nsound/soc/intel/boards/bytcht_da7213.c-303-\n--\nsound/soc/intel/boards/bytcht_es8316.c=733=static void snd_byt_cht_es8316_mc_remove(struct platform_device pdev)\n--\nsound/soc/intel/boards/bytcht_es8316.c-742-\nsound/soc/intel/boards/bytcht_es8316.c:743:static struct platform_driver snd_byt_cht_es8316_mc_driver = {\nsound/soc/intel/boards/bytcht_es8316.c-744-\t.driver = {\n--\nsound/soc/intel/boards/bytcht_es8316.c-750-\nsound/soc/intel/boards/bytcht_es8316.c:751:module_platform_driver(snd_byt_cht_es8316_mc_driver);\nsound/soc/intel/boards/bytcht_es8316.c-752-MODULE_DESCRIPTION(\"ASoC Intel(R) Baytrail/Cherrytrail Machine driver\");\n--\nsound/soc/intel/boards/bytcht_nocodec.c=164=static int snd_bytcht_nocodec_mc_probe(struct platform_device pdev)\n--\nsound/soc/intel/boards/bytcht_nocodec.c-181-\nsound/soc/intel/boards/bytcht_nocodec.c:182:static struct platform_driver snd_bytcht_nocodec_mc_driver = {\nsound/soc/intel/boards/bytcht_nocodec.c-183-\t.driver = {\n--\nsound/soc/intel/boards/bytcht_nocodec.c-187-};\nsound/soc/intel/boards/bytcht_nocodec.c:188:module_platform_driver(snd_bytcht_nocodec_mc_driver);\nsound/soc/intel/boards/bytcht_nocodec.c-189-\n--\nsound/soc/intel/boards/bytcr_rt5640.c=1976=static void snd_byt_rt5640_mc_remove(struct platform_device pdev)\n--\nsound/soc/intel/boards/bytcr_rt5640.c-1987-\nsound/soc/intel/boards/bytcr_rt5640.c:1988:static struct platform_driver snd_byt_rt5640_mc_driver = {\nsound/soc/intel/boards/bytcr_rt5640.c-1989-\t.driver = {\n--\nsound/soc/intel/boards/bytcr_rt5640.c-1995-\nsound/soc/intel/boards/bytcr_rt5640.c:1996:module_platform_driver(snd_byt_rt5640_mc_driver);\nsound/soc/intel/boards/bytcr_rt5640.c-1997-\n--\nsound/soc/intel/boards/bytcr_rt5651.c=1162=static void snd_byt_rt5651_mc_remove(struct platform_device pdev)\n--\nsound/soc/intel/boards/bytcr_rt5651.c-1170-\nsound/soc/intel/boards/bytcr_rt5651.c:1171:static struct platform_driver snd_byt_rt5651_mc_driver = {\nsound/soc/intel/boards/bytcr_rt5651.c-1172-\t.driver = {\n--\nsound/soc/intel/boards/bytcr_rt5651.c-1178-\nsound/soc/intel/boards/bytcr_rt5651.c:1179:module_platform_driver(snd_byt_rt5651_mc_driver);\nsound/soc/intel/boards/bytcr_rt5651.c-1180-\n--\nsound/soc/intel/boards/bytcr_wm5102.c=650=static void snd_byt_wm5102_mc_remove(struct platform_device pdev)\n--\nsound/soc/intel/boards/bytcr_wm5102.c-657-\nsound/soc/intel/boards/bytcr_wm5102.c:658:static struct platform_driver snd_byt_wm5102_mc_driver = {\nsound/soc/intel/boards/bytcr_wm5102.c-659-\t.driver = {\n--\nsound/soc/intel/boards/bytcr_wm5102.c-665-\nsound/soc/intel/boards/bytcr_wm5102.c:666:module_platform_driver(snd_byt_wm5102_mc_driver);\nsound/soc/intel/boards/bytcr_wm5102.c-667-\n--\nsound/soc/intel/boards/cht_bsw_max98090_ti.c=621=static void snd_cht_mc_remove(struct platform_device pdev)\n--\nsound/soc/intel/boards/cht_bsw_max98090_ti.c-629-\nsound/soc/intel/boards/cht_bsw_max98090_ti.c:630:static struct platform_driver snd_cht_mc_driver = {\nsound/soc/intel/boards/cht_bsw_max98090_ti.c-631-\t.driver = {\n--\nsound/soc/intel/boards/cht_bsw_max98090_ti.c-637-\nsound/soc/intel/boards/cht_bsw_max98090_ti.c:638:module_platform_driver(snd_cht_mc_driver)\nsound/soc/intel/boards/cht_bsw_max98090_ti.c-639-\n--\nsound/soc/intel/boards/cht_bsw_nau8824.c=243=static int snd_cht_mc_probe(struct platform_device pdev)\n--\nsound/soc/intel/boards/cht_bsw_nau8824.c-294-\nsound/soc/intel/boards/cht_bsw_nau8824.c:295:static struct platform_driver snd_cht_mc_driver = {\nsound/soc/intel/boards/cht_bsw_nau8824.c-296-\t.driver = {\n--\nsound/soc/intel/boards/cht_bsw_nau8824.c-301-\nsound/soc/intel/boards/cht_bsw_nau8824.c:302:module_platform_driver(snd_cht_mc_driver);\nsound/soc/intel/boards/cht_bsw_nau8824.c-303-\n--\nsound/soc/intel/boards/cht_bsw_rt5645.c=525=static int snd_cht_mc_probe(struct platform_device pdev)\n--\nsound/soc/intel/boards/cht_bsw_rt5645.c-712-\nsound/soc/intel/boards/cht_bsw_rt5645.c:713:static struct platform_driver snd_cht_mc_driver = {\nsound/soc/intel/boards/cht_bsw_rt5645.c-714-\t.driver = {\n--\nsound/soc/intel/boards/cht_bsw_rt5645.c-719-\nsound/soc/intel/boards/cht_bsw_rt5645.c:720:module_platform_driver(snd_cht_mc_driver)\nsound/soc/intel/boards/cht_bsw_rt5645.c-721-\n--\nsound/soc/intel/boards/cht_bsw_rt5672.c=443=static int snd_cht_mc_probe(struct platform_device pdev)\n--\nsound/soc/intel/boards/cht_bsw_rt5672.c-534-\nsound/soc/intel/boards/cht_bsw_rt5672.c:535:static struct platform_driver snd_cht_mc_driver = {\nsound/soc/intel/boards/cht_bsw_rt5672.c-536-\t.driver = {\n--\nsound/soc/intel/boards/cht_bsw_rt5672.c-541-\nsound/soc/intel/boards/cht_bsw_rt5672.c:542:module_platform_driver(snd_cht_mc_driver);\nsound/soc/intel/boards/cht_bsw_rt5672.c-543-\n--\nsound/soc/intel/boards/cht_rt5677.c=520=static int snd_cht_rt5677_probe(struct platform_device pdev)\n--\nsound/soc/intel/boards/cht_rt5677.c-641-\nsound/soc/intel/boards/cht_rt5677.c:642:static struct platform_driver snd_cht_rt5677_driver = {\nsound/soc/intel/boards/cht_rt5677.c-643-\t.driver = {\n--\nsound/soc/intel/boards/cht_rt5677.c-649-\nsound/soc/intel/boards/cht_rt5677.c:650:module_platform_driver(snd_cht_rt5677_driver);\nsound/soc/intel/boards/cht_rt5677.c-651-\n--\nsound/soc/intel/boards/ehl_rt5660.c=298=MODULE_DEVICE_TABLE(platform, ehl_board_ids);\nsound/soc/intel/boards/ehl_rt5660.c-299-\nsound/soc/intel/boards/ehl_rt5660.c:300:static struct platform_driver snd_ehl_rt5660_driver = {\nsound/soc/intel/boards/ehl_rt5660.c-301-\t.driver = {\n--\nsound/soc/intel/boards/ehl_rt5660.c-308-\nsound/soc/intel/boards/ehl_rt5660.c:309:module_platform_driver(snd_ehl_rt5660_driver);\nsound/soc/intel/boards/ehl_rt5660.c-310-\n--\nsound/soc/intel/boards/hsw_rt5640.c=144=static int hsw_rt5640_probe(struct platform_device pdev)\n--\nsound/soc/intel/boards/hsw_rt5640.c-159-\nsound/soc/intel/boards/hsw_rt5640.c:160:static struct platform_driver hsw_rt5640_driver = {\nsound/soc/intel/boards/hsw_rt5640.c-161-\t.probe = hsw_rt5640_probe,\n--\nsound/soc/intel/boards/hsw_rt5640.c-167-\nsound/soc/intel/boards/hsw_rt5640.c:168:module_platform_driver(hsw_rt5640_driver)\nsound/soc/intel/boards/hsw_rt5640.c-169-\n--\nsound/soc/intel/boards/skl_hda_dsp_generic.c=100=static int skl_hda_audio_probe(struct platform_device *pdev)\n--\nsound/soc/intel/boards/skl_hda_dsp_generic.c-162-\nsound/soc/intel/boards/skl_hda_dsp_generic.c:163:static struct platform_driver skl_hda_audio = {\nsound/soc/intel/boards/skl_hda_dsp_generic.c-164-\t.probe = skl_hda_audio_probe,\n--\nsound/soc/intel/boards/skl_hda_dsp_generic.c-170-\nsound/soc/intel/boards/skl_hda_dsp_generic.c:171:module_platform_driver(skl_hda_audio)\nsound/soc/intel/boards/skl_hda_dsp_generic.c-172-\n--\nsound/soc/intel/boards/sof_cs42l42.c=290=MODULE_DEVICE_TABLE(platform, board_ids);\nsound/soc/intel/boards/sof_cs42l42.c-291-\nsound/soc/intel/boards/sof_cs42l42.c:292:static struct platform_driver sof_audio = {\nsound/soc/intel/boards/sof_cs42l42.c-293-\t.probe = sof_audio_probe,\n--\nsound/soc/intel/boards/sof_cs42l42.c-299-};\nsound/soc/intel/boards/sof_cs42l42.c:300:module_platform_driver(sof_audio)\nsound/soc/intel/boards/sof_cs42l42.c-301-\n--\nsound/soc/intel/boards/sof_da7219.c=472=MODULE_DEVICE_TABLE(platform, board_ids);\nsound/soc/intel/boards/sof_da7219.c-473-\nsound/soc/intel/boards/sof_da7219.c:474:static struct platform_driver audio = {\nsound/soc/intel/boards/sof_da7219.c-475-\t.probe = audio_probe,\n--\nsound/soc/intel/boards/sof_da7219.c-481-};\nsound/soc/intel/boards/sof_da7219.c:482:module_platform_driver(audio)\nsound/soc/intel/boards/sof_da7219.c-483-\n--\nsound/soc/intel/boards/sof_es8336.c=871=MODULE_DEVICE_TABLE(platform, board_ids);\nsound/soc/intel/boards/sof_es8336.c-872-\nsound/soc/intel/boards/sof_es8336.c:873:static struct platform_driver sof_es8336_driver = {\n\n" }
55/2	2026/10/27 20:07	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 49525 output: 46 thoughts: 56 Thoughts: Here's my summary, as if I were thinking it: Diving into `skl_hda_dsp_generic.c` Alright, let's get down to brass tacks and dissect this `skl_hda_dsp_generic.c` file. Specifically, I need to understand what's happening within lines 100 to 170. This seems to be a key section in the `sound/soc/intel/boards/` directory, so it’s likely dealing with some core audio configuration for the SKL (Skylake) HDA DSP. I'll read through it carefully, picking apart the structure to see how it's interfacing with the hardware. I anticipate it deals with clock settings, DMA configurations, or perhaps some specific audio codec initialization. Let's dig in and see exactly what the engineers were up to here.
56/2	2026/10/27 20:07	tool	read-file	0m Args: { "File": "sound/soc/intel/boards/skl_hda_dsp_generic.c", "FirstLine": 100, "LineCount": 75 } Results: { "Contents": " 100:\tstatic int skl_hda_audio_probe(struct platform_device pdev)\n 101:\t{\n 102:\t\tstruct snd_soc_acpi_mach mach = pdev-\u003edev.platform_data;\n 103:\t\tstruct sof_card_private ctx;\n 104:\t\tstruct snd_soc_card card;\n 105:\t\tunsigned long board_quirk = skl_hda_get_board_quirk(\u0026mach-\u003emach_params);\n 106:\t\tint ret;\n 107:\t\n 108:\t\tcard = devm_kzalloc(\u0026pdev-\u003edev, sizeof(struct snd_soc_card), GFP_KERNEL);\n 109:\t\tif (!card)\n 110:\t\t\treturn -ENOMEM;\n 111:\t\n 112:\t\tcard-\u003ename = \"hda-dsp\";\n 113:\t\tcard-\u003eowner = THIS_MODULE;\n 114:\t\tcard-\u003efully_routed = true;\n 115:\t\tcard-\u003elate_probe = skl_hda_card_late_probe;\n 116:\t\tcard-\u003eadd_dai_link = skl_hda_add_dai_link;\n 117:\t\n 118:\t\tdev_dbg(\u0026pdev-\u003edev, \"board_quirk = %lx\\n\", board_quirk);\n 119:\t\n 120:\t\t/* initialize ctx with board quirk /\n 121:\t\tctx = sof_intel_board_get_ctx(\u0026pdev-\u003edev, board_quirk);\n 122:\t\tif (!ctx)\n 123:\t\t\treturn -ENOMEM;\n 124:\t\n 125:\t\tif (HDA_EXT_CODEC(mach-\u003emach_params.codec_mask))\n 126:\t\t\tctx-\u003ehda_codec_present = true;\n 127:\t\n 128:\t\tif (mach-\u003emach_params.codec_mask \u0026 IDISP_CODEC_MASK)\n 129:\t\t\tctx-\u003ehdmi.idisp_codec = true;\n 130:\t\n 131:\t\tctx-\u003elink_order_overwrite = HDA_LINK_ORDER;\n 132:\t\tctx-\u003elink_id_overwrite = HDA_LINK_IDS;\n 133:\t\n 134:\t\t/ update dai_link /\n 135:\t\tret = sof_intel_board_set_dai_link(\u0026pdev-\u003edev, card, ctx);\n 136:\t\tif (ret)\n 137:\t\t\treturn ret;\n 138:\t\n 139:\t\tcard-\u003edev = \u0026pdev-\u003edev;\n 140:\t\n 141:\t\tif (mach-\u003emach_params.dmic_num \u003e 0) {\n 142:\t\t\tcard-\u003ecomponents = devm_kasprintf(card-\u003edev, GFP_KERNEL,\n 143:\t\t\t\t\t\t\t \"cfg-dmics:%d\",\n 144:\t\t\t\t\t\t\t mach-\u003emach_params.dmic_num);\n 145:\t\t\tif (!card-\u003ecomponents)\n 146:\t\t\t\treturn -ENOMEM;\n 147:\t\t}\n 148:\t\n 149:\t\tret = snd_soc_fixup_dai_links_platform_name(card,\n 150:\t\t\t\t\t\t\t mach-\u003emach_params.platform);\n 151:\t\tif (ret)\n 152:\t\t\treturn ret;\n 153:\t\n 154:\t\tsnd_soc_card_set_drvdata(card, ctx);\n 155:\t\n 156:\t\tret = devm_snd_soc_register_card(\u0026pdev-\u003edev, card);\n 157:\t\tif (!ret)\n 158:\t\t\tskl_set_hda_codec_autosuspend_delay(card);\n 159:\t\n 160:\t\treturn ret;\n 161:\t}\n 162:\t\n 163:\tstatic struct platform_driver skl_hda_audio = {\n 164:\t\t.probe = skl_hda_audio_probe,\n 165:\t\t.driver = {\n 166:\t\t\t.name = \"skl_hda_dsp_generic\",\n 167:\t\t\t.pm = \u0026snd_soc_pm_ops,\n 168:\t\t},\n 169:\t};\n 170:\t\n 171:\tmodule_platform_driver(skl_hda_audio)\n 172:\t\n 173:\t/ Module information */\n 174:\tMODULE_DESCRIPTION(\"SKL/KBL/BXT/APL HDA Generic Machine driver\");\n" }
57/2	2026/10/27 20:07	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 50997 output: 31 thoughts: 33 Thoughts: Okay, here's my summary, taking the form of my thought process on the matter: Pinpointing the Creation of the "skl_hda_dsp_generic" Platform Device Alright, so I need to figure out where this "skl_hda_dsp_generic" platform device is being instantiated. I'm dealing with audio on Intel systems, so I'm familiar with this device name. My first instinct, as always, is to dive into the code. I'll start with a straightforward search for that exact string – "skl_hda_dsp_generic." That's the most direct route to find where it's being defined or called. Let's see what the grep search turns up. This is a common starting point in this type of debugging.
58/2	2026/10/27 20:07	tool	grepper	0m Args: { "Expression": "skl_hda_dsp_generic", "PathPrefixes": [ "sound/" ] } Results: { "Output": "sound/soc/intel/boards/Makefile=24=snd-soc-sof_da7219-y := sof_da7219.o\nsound/soc/intel/boards/Makefile:25:snd-soc-skl_hda_dsp-y := skl_hda_dsp_generic.o\nsound/soc/intel/boards/Makefile-26-snd-soc-ehl-rt5660-y := ehl_rt5660.o\n--\nsound/soc/intel/boards/skl_hda_dsp_generic.c=163=static struct platform_driver skl_hda_audio = {\n--\nsound/soc/intel/boards/skl_hda_dsp_generic.c-165-\t.driver = {\nsound/soc/intel/boards/skl_hda_dsp_generic.c:166:\t\t.name = \"skl_hda_dsp_generic\",\nsound/soc/intel/boards/skl_hda_dsp_generic.c-167-\t\t.pm = \u0026snd_soc_pm_ops,\n--\nsound/soc/intel/boards/skl_hda_dsp_generic.c=176=MODULE_LICENSE(\"GPL v2\");\nsound/soc/intel/boards/skl_hda_dsp_generic.c:177:MODULE_ALIAS(\"platform:skl_hda_dsp_generic\");\nsound/soc/intel/boards/skl_hda_dsp_generic.c-178-MODULE_IMPORT_NS(\"SND_SOC_INTEL_SOF_BOARD_HELPERS\");\n--\nsound/soc/intel/common/soc-acpi-intel-hda-match.c=12=struct snd_soc_acpi_mach snd_soc_acpi_intel_hda_machines[] = {\n--\nsound/soc/intel/common/soc-acpi-intel-hda-match.c-14-\t\t/* .id is not used in this file /\nsound/soc/intel/common/soc-acpi-intel-hda-match.c:15:\t\t.drv_name = \"skl_hda_dsp_generic\",\nsound/soc/intel/common/soc-acpi-intel-hda-match.c-16-\t\t.sof_tplg_filename = \"sof-hda-generic\", / the tplg suffix is added at run time */\n" }
59/2	2026/10/27 20:07	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 51805 output: 32 thoughts: 785 Thoughts: Analyzing the Fuzzing Potential of Sound Drivers Okay, so `snd_soc_acpi_intel_hda_machines` is matched during the SOF machine driver registration. My first instinct is to check where this happens, so I'll look in `sound/soc/sof/intel/hda.c` and `sound/soc/sof/sof-pci-dev.c`. The real question is whether any of this is even reachable in a standard QEMU or GCE environment. Can syzkaller instantiate a platform device? Probably not directly, certainly not in a way that would let me bypass the NULL pointer checks in `skl_hda_audio_probe`. Alright, let's switch gears and focus on the negative criteria for WorthFuzzing. It's time to meticulously analyze the modified code and see if we can exclude it. The key here is to determine if any of the changes fall into the "structurally unreachable hardware" category or "Unreachable execution paths". The patch affects `sound/soc/codecs/hdac_hda.c` and `sound/soc/sof/intel/hda-codec.c`. I need to break down the changes: In `hdac_hda.c`, there's `pm_runtime_set_active` and `pm_runtime_enable` calls in probe and remove functions along with a new function and some memory allocation, and in `hda-codec.c` there is memory allocation being removed. Now the million-dollar question: Are Intel SOF or Intel HDA DSP structurally unreachable? Does QEMU have an emulated Intel HDA controller? YES! QEMU has `-device intel-hda`. This is promising. The next step is to figure out whether `-device intel-hda` is using SOF or legacy HDA. I need to know the PCI vendor/device ID that QEMU presents. Looking at `hw/audio/intel-hda.c`, the vendor is 0x8086 (Intel) and the device IDs are 0x2668 (ICH6) or 0x293e (ICH9). Now I have to determine if `snd_sof_pci_intel_*` drivers actually bind to these ICH devices. Let's check all the PCI IDs in `sound/soc/sof/intel/`. This could be the breakthrough I'm looking for!
60/2	2026/10/27 20:07	tool	grepper	0m Args: { "Expression": "PCI_DEVICE", "PathPrefixes": [ "sound/soc/sof/intel/" ] } Results: { "Output": "sound/soc/sof/intel/pci-apl.c=87=static const struct pci_device_id sof_pci_ids[] = {\nsound/soc/sof/intel/pci-apl.c:88:\t{ PCI_DEVICE_DATA(INTEL, HDA_APL, \u0026bxt_desc) },\nsound/soc/sof/intel/pci-apl.c:89:\t{ PCI_DEVICE_DATA(INTEL, HDA_GLK, \u0026glk_desc) },\nsound/soc/sof/intel/pci-apl.c-90-\t{ 0, }\n--\nsound/soc/sof/intel/pci-cnl.c=122=static const struct pci_device_id sof_pci_ids[] = {\nsound/soc/sof/intel/pci-cnl.c:123:\t{ PCI_DEVICE_DATA(INTEL, HDA_CNL_LP, \u0026cnl_desc) },\nsound/soc/sof/intel/pci-cnl.c:124:\t{ PCI_DEVICE_DATA(INTEL, HDA_CNL_H, \u0026cfl_desc) },\nsound/soc/sof/intel/pci-cnl.c:125:\t{ PCI_DEVICE_DATA(INTEL, HDA_CML_LP, \u0026cml_desc) },\nsound/soc/sof/intel/pci-cnl.c:126:\t{ PCI_DEVICE_DATA(INTEL, HDA_CML_H, \u0026cml_desc) },\nsound/soc/sof/intel/pci-cnl.c:127:\t{ PCI_DEVICE_DATA(INTEL, HDA_CML_S, \u0026cml_desc) },\nsound/soc/sof/intel/pci-cnl.c-128-\t{ 0, }\n--\nsound/soc/sof/intel/pci-icl.c=88=static const struct pci_device_id sof_pci_ids[] = {\nsound/soc/sof/intel/pci-icl.c:89:\t{ PCI_DEVICE_DATA(INTEL, HDA_ICL_LP, \u0026icl_desc) },\nsound/soc/sof/intel/pci-icl.c:90:\t{ PCI_DEVICE_DATA(INTEL, HDA_ICL_H, \u0026icl_desc) },\nsound/soc/sof/intel/pci-icl.c:91:\t{ PCI_DEVICE_DATA(INTEL, HDA_ICL_N, \u0026jsl_desc) },\nsound/soc/sof/intel/pci-icl.c:92:\t{ PCI_DEVICE_DATA(INTEL, HDA_JSL_N, \u0026jsl_desc) },\nsound/soc/sof/intel/pci-icl.c-93-\t{ 0, }\n--\nsound/soc/sof/intel/pci-lnl.c=62=static const struct pci_device_id sof_pci_ids[] = {\nsound/soc/sof/intel/pci-lnl.c:63:\t{ PCI_DEVICE_DATA(INTEL, HDA_LNL_P, \u0026lnl_desc) }, /* LNL-P /\nsound/soc/sof/intel/pci-lnl.c-64-\t{ 0, }\n--\nsound/soc/sof/intel/pci-mtl.c=122=static const struct pci_device_id sof_pci_ids[] = {\nsound/soc/sof/intel/pci-mtl.c:123:\t{ PCI_DEVICE_DATA(INTEL, HDA_MTL, \u0026mtl_desc) },\nsound/soc/sof/intel/pci-mtl.c:124:\t{ PCI_DEVICE_DATA(INTEL, HDA_ARL_S, \u0026arl_s_desc) },\nsound/soc/sof/intel/pci-mtl.c:125:\t{ PCI_DEVICE_DATA(INTEL, HDA_ARL, \u0026arl_desc) },\nsound/soc/sof/intel/pci-mtl.c-126-\t{ 0, }\n--\nsound/soc/sof/intel/pci-nvl.c=90=static const struct pci_device_id sof_pci_ids[] = {\nsound/soc/sof/intel/pci-nvl.c:91:\t{ PCI_DEVICE_DATA(INTEL, HDA_NVL, \u0026nvl_desc) }, / NVL /\nsound/soc/sof/intel/pci-nvl.c:92:\t{ PCI_DEVICE_DATA(INTEL, HDA_NVL_S, \u0026nvl_s_desc) }, / NVL-S /\nsound/soc/sof/intel/pci-nvl.c-93-\t{ 0, }\n--\nsound/soc/sof/intel/pci-ptl.c=90=static const struct pci_device_id sof_pci_ids[] = {\nsound/soc/sof/intel/pci-ptl.c:91:\t{ PCI_DEVICE_DATA(INTEL, HDA_PTL, \u0026ptl_desc) }, / PTL /\nsound/soc/sof/intel/pci-ptl.c:92:\t{ PCI_DEVICE_DATA(INTEL, HDA_PTL_H, \u0026ptl_desc) }, / PTL-H /\nsound/soc/sof/intel/pci-ptl.c:93:\t{ PCI_DEVICE_DATA(INTEL, HDA_WCL, \u0026wcl_desc) }, / WCL */\nsound/soc/sof/intel/pci-ptl.c-94-\t{ 0, }\n--\nsound/soc/sof/intel/pci-skl.c=71=static const struct pci_device_id sof_pci_ids[] = {\nsound/soc/sof/intel/pci-skl.c:72:\t{ PCI_DEVICE_DATA(INTEL, HDA_SKL_LP, \u0026skl_desc) },\nsound/soc/sof/intel/pci-skl.c:73:\t{ PCI_DEVICE_DATA(INTEL, HDA_KBL_LP, \u0026kbl_desc) },\nsound/soc/sof/intel/pci-skl.c-74-\t{ 0, }\n--\nsound/soc/sof/intel/pci-tgl.c=286=static const struct pci_device_id sof_pci_ids[] = {\nsound/soc/sof/intel/pci-tgl.c:287:\t{ PCI_DEVICE_DATA(INTEL, HDA_TGL_LP, \u0026tgl_desc) },\nsound/soc/sof/intel/pci-tgl.c:288:\t{ PCI_DEVICE_DATA(INTEL, HDA_TGL_H, \u0026tglh_desc) },\nsound/soc/sof/intel/pci-tgl.c:289:\t{ PCI_DEVICE_DATA(INTEL, HDA_EHL_0, \u0026ehl_desc) },\nsound/soc/sof/intel/pci-tgl.c:290:\t{ PCI_DEVICE_DATA(INTEL, HDA_EHL_3, \u0026ehl_desc) },\nsound/soc/sof/intel/pci-tgl.c:291:\t{ PCI_DEVICE_DATA(INTEL, HDA_ADL_S, \u0026adls_desc) },\nsound/soc/sof/intel/pci-tgl.c:292:\t{ PCI_DEVICE_DATA(INTEL, HDA_RPL_S, \u0026rpls_desc) },\nsound/soc/sof/intel/pci-tgl.c:293:\t{ PCI_DEVICE_DATA(INTEL, HDA_ADL_P, \u0026adl_desc) },\nsound/soc/sof/intel/pci-tgl.c:294:\t{ PCI_DEVICE_DATA(INTEL, HDA_ADL_PS, \u0026adl_desc) },\nsound/soc/sof/intel/pci-tgl.c:295:\t{ PCI_DEVICE_DATA(INTEL, HDA_RPL_P_0, \u0026rpl_desc) },\nsound/soc/sof/intel/pci-tgl.c:296:\t{ PCI_DEVICE_DATA(INTEL, HDA_RPL_P_1, \u0026rpl_desc) },\nsound/soc/sof/intel/pci-tgl.c:297:\t{ PCI_DEVICE_DATA(INTEL, HDA_ADL_M, \u0026adl_desc) },\nsound/soc/sof/intel/pci-tgl.c:298:\t{ PCI_DEVICE_DATA(INTEL, HDA_ADL_PX, \u0026adl_desc) },\nsound/soc/sof/intel/pci-tgl.c:299:\t{ PCI_DEVICE_DATA(INTEL, HDA_RPL_M, \u0026rpl_desc) },\nsound/soc/sof/intel/pci-tgl.c:300:\t{ PCI_DEVICE_DATA(INTEL, HDA_RPL_PX, \u0026rpl_desc) },\nsound/soc/sof/intel/pci-tgl.c:301:\t{ PCI_DEVICE_DATA(INTEL, HDA_ADL_N, \u0026adln_desc) },\nsound/soc/sof/intel/pci-tgl.c-302-\t{ 0, }\n--\nsound/soc/sof/intel/pci-tng.c=227=static const struct pci_device_id sof_pci_ids[] = {\nsound/soc/sof/intel/pci-tng.c:228:\t{ PCI_DEVICE_DATA(INTEL, SST_TNG, \u0026tng_desc) },\nsound/soc/sof/intel/pci-tng.c-229-\t{ 0, }\n" }
61/2	2026/10/27 20:07	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 55591 output: 21 thoughts: 75 Thoughts: Okay, here's my quick take on this. Investigating SOF PCI ID Mismatches Right, so none of the System On a Chip (SOF) PCI IDs are matching up with the ICH6 or ICH9 standards, that's immediately apparent. That's a bit of a wrinkle. I need to figure out how these SOF devices are actually being classified. My immediate thought is to check the `include/sound/soc-acpi-intel-match.h` file, or wherever these `HDA_SKL_LP` identifiers are defined. That's usually the place where these sorts of things are hammered out. Time to go hunting for the definition of `HDA_SKL_LP` and get a clearer picture.
62/2	2026/10/27 20:08	tool	grepper	0m Args: { "Expression": "HDA_SKL_LP" } Results: { "Output": "include/linux/pci_ids.h-3152-#define PCI_DEVICE_ID_INTEL_HDA_WPT_LP\t0x9ca0\ninclude/linux/pci_ids.h:3153:#define PCI_DEVICE_ID_INTEL_HDA_SKL_LP\t0x9d70\ninclude/linux/pci_ids.h-3154-#define PCI_DEVICE_ID_INTEL_HDA_KBL_LP\t0x9d71\n--\nsound/hda/controllers/intel.c=2507=static const struct pci_device_id azx_ids[] = {\n--\nsound/hda/controllers/intel.c-2532-\t/* Skylake-LP (Sunrise Point-LP) /\nsound/hda/controllers/intel.c:2533:\t{ PCI_DEVICE_DATA(INTEL, HDA_SKL_LP, AZX_DRIVER_SKL \| AZX_DCAPS_INTEL_SKYLAKE) },\nsound/hda/controllers/intel.c-2534-\t/ Kabylake */\n--\nsound/hda/core/intel-dsp-config.c=50=static const struct config_entry config_table[] = {\n--\nsound/hda/core/intel-dsp-config.c-65-\t\t.flags = FLAG_SST,\nsound/hda/core/intel-dsp-config.c:66:\t\t.device = PCI_DEVICE_ID_INTEL_HDA_SKL_LP,\nsound/hda/core/intel-dsp-config.c-67-\t\t.dmi_table = (const struct dmi_system_id []) {\n--\nsound/hda/core/intel-dsp-config.c-78-\t\t.flags = FLAG_SST \| FLAG_SST_ONLY_IF_DMIC,\nsound/hda/core/intel-dsp-config.c:79:\t\t.device = PCI_DEVICE_ID_INTEL_HDA_SKL_LP,\nsound/hda/core/intel-dsp-config.c-80-\t},\n--\nsound/hda/core/intel-dsp-config.c-120-\t{\nsound/hda/core/intel-dsp-config.c:121:\t\t.device = PCI_DEVICE_ID_INTEL_HDA_SKL_LP,\nsound/hda/core/intel-dsp-config.c-122-\t},\n--\nsound/soc/intel/avs/board_selection.c=366=static const struct avs_acpi_boards i2s_boards[] = {\nsound/soc/intel/avs/board_selection.c:367:\tAVS_MACH_ENTRY(HDA_SKL_LP,\tavs_skl_i2s_machines),\nsound/soc/intel/avs/board_selection.c-368-\tAVS_MACH_ENTRY(HDA_KBL_LP,\tavs_kbl_i2s_machines),\n--\nsound/soc/intel/avs/core.c=915=static const struct pci_device_id avs_ids[] = {\nsound/soc/intel/avs/core.c:916:\t{ PCI_DEVICE_DATA(INTEL, HDA_SKL_LP, \u0026skl_desc) },\nsound/soc/intel/avs/core.c-917-\t{ PCI_DEVICE_DATA(INTEL, HDA_SKL, \u0026skl_desc) },\n--\nsound/soc/sof/intel/pci-skl.c=71=static const struct pci_device_id sof_pci_ids[] = {\nsound/soc/sof/intel/pci-skl.c:72:\t{ PCI_DEVICE_DATA(INTEL, HDA_SKL_LP, \u0026skl_desc) },\nsound/soc/sof/intel/pci-skl.c-73-\t{ PCI_DEVICE_DATA(INTEL, HDA_KBL_LP, \u0026kbl_desc) },\n" }
63/2	2026/10/27 20:08	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 56846 output: 30 thoughts: 700 Thoughts: Analyzing QEMU's Audio Emulation for Fuzzing Opportunities Okay, so I'm looking at this device ID, `PCI_DEVICE_ID_INTEL_HDA_SKL_LP` which is 0x9d70. My immediate thought is, how does this relate to QEMU's emulation? I need to check QEMU's PCI device ID for intel-hda. Quick check shows ICH6 (0x2668) or ICH9 (0x293e). Hold on, does QEMU even emulate any of the newer SOF DSPs like Skylake, Tiger Lake, or Alder Lake? No, it doesn't. QEMU only emulates the standard ICH6/ICH9 Intel HDA controller. That means QEMU uses `azx_probe` in `sound/hda/controllers/intel.c`, which is the old standard. This raises a red flag. Does QEMU even have any Skylake LP or newer HDA DSP or SOF DSP emulation? No. So, can device IDs be spoofed, or can userspace bind a PCI driver in QEMU? I know QEMU offers a way to use `new_id` via sysfs for a PCI driver, but even if I tried that, QEMU's device remains ICH6/ICH9 if there's no actual hardware to back it up. Syzkaller probably doesn't use that unless there's a device present, and even if it did, the DSP registers, memory spaces, and firmware loading (SOF firmware!) don't exist in QEMU. Now, let's circle back to my initial questions. I need to know WHEN TO RETURN WorthFuzzing=false. I remember reading some of the negative criteria: "Structurally unreachable hardware: Vendor-specific PCIe switches, SmartNICs, or GPU drivers... requiring physical ASIC/PCIe cards not emulated in standard QEMU. Also, Unreachable execution paths: Driver teardown callbacks (.remove, .shutdown, pci_unregister_driver) executed only during physical PCI hot-unplug or manual sysfs driver unbinding." Right, let's focus on that second one. "Unreachable execution paths...". Okay, what's this patch about? Let me check the commit message or the patch diff comments. Ah, this looks interesting: "The codec is in D0, the status is RPM_SUSPENDED after a previous unbind". This balances a disable and cleanup, and allows the legacy codec driver to match again after an unbind. There's a function `hdac_hda_restore_dev_type(void *data)` that sets `hdev->type = HDA_DEV_LEGACY;`. Why did the author make this change? What's the context? Let me search the recent commits or discussions around this commit in the git log. And I need to quickly grep for `hdac_hda_restore_dev_type` - it appears it was only introduced in this patch. I should also search for `HDA_DEV_LEGACY` in the `sound/` directory. Okay, let's see what I find…
64/2	2026/10/27 20:08	tool	grepper	0m Args: { "Expression": "HDA_DEV_LEGACY", "PathPrefixes": [ "sound/" ] } Results: { "Output": "sound/hda/common/bind.c=192=int __hda_codec_driver_register(struct hda_codec_driver drv, const char name,\n--\nsound/hda/common/bind.c-201-\tdrv-\u003ecore.driver.pm = pm_ptr(\u0026hda_codec_driver_pm);\nsound/hda/common/bind.c:202:\tdrv-\u003ecore.type = HDA_DEV_LEGACY;\nsound/hda/common/bind.c-203-\tdrv-\u003ecore.match = hda_codec_match;\n--\nsound/hda/common/codec.c=841=void snd_hda_codec_unregister(struct hda_codec codec)\n--\nsound/hda/common/codec.c-848-\t /\nsound/hda/common/codec.c:849:\tif (codec-\u003ecore.type == HDA_DEV_LEGACY)\nsound/hda/common/codec.c-850-\t\tsnd_hdac_device_unregister(\u0026codec-\u003ecore);\n--\nsound/hda/common/codec.c-856-\t /\nsound/hda/common/codec.c:857:\tif (codec-\u003ecore.type == HDA_DEV_LEGACY)\nsound/hda/common/codec.c-858-\t\tput_device(hda_codec_dev(codec));\n--\nsound/hda/common/codec.c=891=snd_hda_codec_device_init(struct hda_bus bus, unsigned int codec_addr,\n--\nsound/hda/common/codec.c-921-\tcodec-\u003ecore.dev.release = snd_hda_codec_dev_release;\nsound/hda/common/codec.c:922:\tcodec-\u003ecore.type = HDA_DEV_LEGACY;\nsound/hda/common/codec.c-923-\n--\nsound/soc/codecs/hdac_hda.c=631=static void hdac_hda_restore_dev_type(void data)\n--\nsound/soc/codecs/hdac_hda.c-634-\nsound/soc/codecs/hdac_hda.c:635:\thdev-\u003etype = HDA_DEV_LEGACY;\nsound/soc/codecs/hdac_hda.c-636-}\n--\nsound/soc/sof/intel/hda-codec.c=147=static int hda_codec_probe(struct snd_sof_dev sdev, int address)\n--\nsound/soc/sof/intel/hda-codec.c-167-\nsound/soc/sof/intel/hda-codec.c:168:\tcodec = hda_codec_device_init(\u0026hbus-\u003ecore, address, HDA_DEV_LEGACY);\nsound/soc/sof/intel/hda-codec.c-169-\tret = PTR_ERR_OR_ZERO(codec);\n" }
65/2	2026/10/27 20:08	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 59016 output: 42 thoughts: 56 Thoughts: Here's my summary, as if I were thinking these thoughts: Analyzing the Codec Probe in the hda-codec Driver Okay, let's dive into this `hdac_hda_codec_probe` function. I'm especially interested in how `hdev->type` is being handled within this probe process. I need to understand how the codec type is being initialized and potentially modified during this stage. Alright, let's pinpoint the relevant section in `sound/soc/codecs/hdac_hda.c`. I'll focus on lines 400 through 470, as that's likely where the core of the probe logic is situated. I need to trace the flow of execution and understand what's happening to that `hdev->type` variable. Are there any conditional checks, assignments, or potential modifications that could affect the codec's identification or behavior down the line? I need to build a mental model of this part of the driver's operation.
66/2	2026/10/27 20:08	tool	read-file	0m Args: { "File": "sound/soc/codecs/hdac_hda.c", "FirstLine": 400, "LineCount": 70 } Results: { "Contents": " 400:\t\n 401:\t\treturn false;\n 402:\t}\n 403:\t\n 404:\tstatic int hdac_hda_codec_probe(struct snd_soc_component component)\n 405:\t{\n 406:\t\tstruct hdac_hda_priv hda_pvt =\n 407:\t\t\t\tsnd_soc_component_get_drvdata(component);\n 408:\t\tstruct hdac_device hdev = \u0026hda_pvt-\u003ecodec-\u003ecore;\n 409:\t\tstruct hda_codec hcodec = hda_pvt-\u003ecodec;\n 410:\t\tstruct hda_codec_driver driver = hda_codec_to_driver(hcodec);\n 411:\t\tstruct hdac_ext_link hlink;\n 412:\t\tint ret;\n 413:\t\n 414:\t\thlink = snd_hdac_ext_bus_get_hlink_by_name(hdev-\u003ebus, dev_name(\u0026hdev-\u003edev));\n 415:\t\tif (!hlink) {\n 416:\t\t\tdev_err(\u0026hdev-\u003edev, \"%s: hdac link not found\\n\", __func__);\n 417:\t\t\treturn -EIO;\n 418:\t\t}\n 419:\t\n 420:\t\tsnd_hdac_ext_bus_link_get(hdev-\u003ebus, hlink);\n 421:\t\n 422:\t\t/\n 423:\t\t Ensure any HDA display is powered at codec probe.\n 424:\t\t * After snd_hda_codec_device_new(), display power is\n 425:\t\t * managed by runtime PM.\n 426:\t\t /\n 427:\t\tif (hda_pvt-\u003eneed_display_power)\n 428:\t\t\tsnd_hdac_display_power(hdev-\u003ebus,\n 429:\t\t\t\t\t HDA_CODEC_IDX_CONTROLLER, true);\n 430:\t\n 431:\t\tret = snd_hda_codec_device_new(hcodec-\u003ebus, component-\u003ecard-\u003esnd_card,\n 432:\t\t\t\t\t hdev-\u003eaddr, hcodec, true);\n 433:\t\tif (ret \u003c 0) {\n 434:\t\t\tdev_err(\u0026hdev-\u003edev, \"%s: failed to create hda codec %d\\n\", __func__, ret);\n 435:\t\t\tgoto error_no_pm;\n 436:\t\t}\n 437:\t\n 438:\t\t/ The codec is in D0, the status is RPM_SUSPENDED after a previous unbind /\n 439:\t\tret = pm_runtime_set_active(\u0026hdev-\u003edev);\n 440:\t\tif (ret \u003c 0) {\n 441:\t\t\tdev_err(\u0026hdev-\u003edev, \"%s: failed to set runtime PM active %d\\n\", __func__, ret);\n 442:\t\t\tgoto error_no_pm;\n 443:\t\t}\n 444:\t\n 445:\t#ifdef CONFIG_SND_HDA_PATCH_LOADER\n 446:\t\tif (loadable_patch[hda_pvt-\u003edev_index] \u0026\u0026 loadable_patch[hda_pvt-\u003edev_index]) {\n 447:\t\t\tconst struct firmware fw __free(firmware) = NULL;\n 448:\t\n 449:\t\t\tdev_info(\u0026hdev-\u003edev, \"Applying patch firmware '%s'\\n\",\n 450:\t\t\t\t loadable_patch[hda_pvt-\u003edev_index]);\n 451:\t\t\tret = request_firmware(\u0026fw, loadable_patch[hda_pvt-\u003edev_index],\n 452:\t\t\t\t\t \u0026hdev-\u003edev);\n 453:\t\t\tif (ret \u003c 0)\n 454:\t\t\t\tgoto error_no_pm;\n 455:\t\t\tif (fw) {\n 456:\t\t\t\tret = snd_hda_load_patch(hcodec-\u003ebus, fw-\u003esize, fw-\u003edata);\n 457:\t\t\t\tif (ret \u003c 0) {\n 458:\t\t\t\t\tdev_err(\u0026hdev-\u003edev, \"%s: failed to load hda patch %d\\n\", __func__, ret);\n 459:\t\t\t\t\tgoto error_no_pm;\n 460:\t\t\t\t}\n 461:\t\t\t}\n 462:\t\t}\n 463:\t#endif\n 464:\t\t/\n 465:\t\t * Overwrite type to HDA_DEV_ASOC since it is a ASoC driver\n 466:\t\t * hda_codec.c will check this flag to determine if unregister\n 467:\t\t * device is needed.\n 468:\t\t */\n 469:\t\thdev-\u003etype = HDA_DEV_ASOC;\n" }
67/2	2026/10/27 20:08	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 60564 output: 20 thoughts: 2012 Thoughts: WorthFuzzing Analysis: Intel SOF HDA Codec Driver Patch Alright, let's break this down. From lines 465-469, this patch is clearly tweaking `hdev->type`, setting it to `HDA_DEV_ASOC`, then restoring it to `HDA_DEV_LEGACY` with a `devm_add_action`. This suggests the fix addresses issues with unbind/rebind cycles, likely for an Audio SoC (ASoC) driver. Also, in `hdac_hda_codec_probe` and `hdac_hda_codec_remove`, there are `pm_runtime` calls managing power state, which are also related to unbinding. This all points to a fix for Intel SOF HDA codec driver unbind/rebind issues, right? But the critical question is: can this code be reached during fuzzing? Can syzkaller trigger this scenario? First, I have to determine if any virtual or emulated hardware uses SOF. QEMU doesn't emulate the Intel SOF DSP at all. It needs DSP firmware, host IPC registers, and other features that aren't available in QEMU. Next, I have to figure out if `hdac_hda` can be used by any other audio controller. I went back to checking where `snd_soc_hdac_hda_get_ops` is used and saw it is ONLY used in `sound/soc/sof/intel/hda-bus.c` which then calls `snd_hdac_ext_bus_init`, which only is called in `sof_hda_bus_init()`. This is only called in `sound/soc/sof/intel/hda.c`. I recall that `hda.c` is the Intel SOF HDA controller backend, which is probed only on specific Intel SoCs when a PCI device is detected by `snd_sof_pci_intel_`. This is never the ICH6/ICH9 emulated HDA controller in QEMU. However, I briefly considered `sound/soc/intel/boards/skl_hda_dsp_generic.c`. But I recall that platform devices can usually only be created by the kernel, device trees, or ACPI tables. Userspace can't create them through sysfs. Plus, even if it could, `hdac_hda` is an HDAC bus device, not a platform device. The HDAC bus is created by the controller. A codec is attached to the HDAC bus when the controller discovers a codec on the link. This all requires actual hardware or emulation that can respond to HDA bus commands. Now, let's go back and re-read the negative criteria. The key point is "Structurally unreachable hardware." This specifically calls out "Vendor-specific PCIe switches, SmartNICs, or GPU drivers... requiring physical ASIC/PCIe cards not emulated in standard QEMU". Is Intel SOF DSP hardware structurally unreachable? Yes! It needs specific Intel hardware like Skylake/Tigerlake DSPs, or an ASIC, which is not emulated in QEMU. QEMU's `intel-hda` emulates an ICH6/ICH9 PCI HDA controller. Does this use Intel SOF or `hdac_hda`? The PCI ID in QEMU is 0x8086:0x2668 (ICH6) or 0x8086:0x293e (ICH9). These IDs are not* the ones used by the SOF-specific drivers. Therefore, because Intel SOF DSP is not emulated in QEMU, the code path that this patch modifies, is unreachable.
68/2	2026/10/27 20:08	tool	grepper	0m Args: { "Expression": "0x293e" } Results: { "Output": "crypto/wp512.c=228=static const u64 C2[256] = {\n--\ncrypto/wp512.c-258-\t0xaf5fd9d943d9869aULL, 0xf931f2f2eff2c31dULL, 0xdba8e3e3abe34b48ULL,\ncrypto/wp512.c:259:\t0xb6b95b5b715be22aULL, 0x0dbc88881a883492ULL, 0x293e9a9a529aa4c8ULL,\ncrypto/wp512.c-260-\t0x4c0b262698262dbeULL, 0x64bf3232c8328dfaULL, 0x7d59b0b0fab0e94aULL,\n--\ndrivers/gpu/drm/amd/include/asic_reg/dcn/dcn_1_0_offset.h-10686-#define mmDCIO_UNIPHY0_UNIPHY_MACRO_CNTL_RESERVED21_BASE_IDX 2\ndrivers/gpu/drm/amd/include/asic_reg/dcn/dcn_1_0_offset.h:10687:#define mmDCIO_UNIPHY0_UNIPHY_MACRO_CNTL_RESERVED22 0x293e\ndrivers/gpu/drm/amd/include/asic_reg/dcn/dcn_1_0_offset.h-10688-#define mmDCIO_UNIPHY0_UNIPHY_MACRO_CNTL_RESERVED22_BASE_IDX 2\n--\ndrivers/gpu/drm/amd/include/asic_reg/dcn/dcn_2_0_0_offset.h-12963-#define mmDCIO_UNIPHY0_UNIPHY_MACRO_CNTL_RESERVED21_BASE_IDX 2\ndrivers/gpu/drm/amd/include/asic_reg/dcn/dcn_2_0_0_offset.h:12964:#define mmDCIO_UNIPHY0_UNIPHY_MACRO_CNTL_RESERVED22 0x293e\ndrivers/gpu/drm/amd/include/asic_reg/dcn/dcn_2_0_0_offset.h-12965-#define mmDCIO_UNIPHY0_UNIPHY_MACRO_CNTL_RESERVED22_BASE_IDX 2\n--\ndrivers/gpu/drm/amd/include/asic_reg/dcn/dcn_3_1_5_offset.h-11715-#define regDCIO_UNIPHY0_UNIPHY_MACRO_CNTL_RESERVED21_BASE_IDX 2\ndrivers/gpu/drm/amd/include/asic_reg/dcn/dcn_3_1_5_offset.h:11716:#define regDCIO_UNIPHY0_UNIPHY_MACRO_CNTL_RESERVED22 0x293e\ndrivers/gpu/drm/amd/include/asic_reg/dcn/dcn_3_1_5_offset.h-11717-#define regDCIO_UNIPHY0_UNIPHY_MACRO_CNTL_RESERVED22_BASE_IDX 2\n--\ndrivers/gpu/drm/amd/include/asic_reg/dcn/dcn_3_1_6_offset.h-12206-#define regDCIO_UNIPHY0_UNIPHY_MACRO_CNTL_RESERVED21_BASE_IDX 2\ndrivers/gpu/drm/amd/include/asic_reg/dcn/dcn_3_1_6_offset.h:12207:#define regDCIO_UNIPHY0_UNIPHY_MACRO_CNTL_RESERVED22 0x293e\ndrivers/gpu/drm/amd/include/asic_reg/dcn/dcn_3_1_6_offset.h-12208-#define regDCIO_UNIPHY0_UNIPHY_MACRO_CNTL_RESERVED22_BASE_IDX 2\n--\ndrivers/gpu/drm/amd/include/asic_reg/dcn/dcn_3_2_0_offset.h-11124-#define regDCIO_UNIPHY0_UNIPHY_MACRO_CNTL_RESERVED21_BASE_IDX 2\ndrivers/gpu/drm/amd/include/asic_reg/dcn/dcn_3_2_0_offset.h:11125:#define regDCIO_UNIPHY0_UNIPHY_MACRO_CNTL_RESERVED22 0x293e\ndrivers/gpu/drm/amd/include/asic_reg/dcn/dcn_3_2_0_offset.h-11126-#define regDCIO_UNIPHY0_UNIPHY_MACRO_CNTL_RESERVED22_BASE_IDX 2\n--\ndrivers/gpu/drm/amd/include/asic_reg/dcn/dcn_3_2_1_offset.h-11133-#define regDCIO_UNIPHY0_UNIPHY_MACRO_CNTL_RESERVED21_BASE_IDX 2\ndrivers/gpu/drm/amd/include/asic_reg/dcn/dcn_3_2_1_offset.h:11134:#define regDCIO_UNIPHY0_UNIPHY_MACRO_CNTL_RESERVED22 0x293e\ndrivers/gpu/drm/amd/include/asic_reg/dcn/dcn_3_2_1_offset.h-11135-#define regDCIO_UNIPHY0_UNIPHY_MACRO_CNTL_RESERVED22_BASE_IDX 2\n--\ndrivers/gpu/drm/amd/include/asic_reg/dcn/dcn_4_1_0_offset.h-11434-#define regDCIO_UNIPHY0_UNIPHY_MACRO_CNTL_RESERVED21_BASE_IDX 2\ndrivers/gpu/drm/amd/include/asic_reg/dcn/dcn_4_1_0_offset.h:11435:#define regDCIO_UNIPHY0_UNIPHY_MACRO_CNTL_RESERVED22 0x293e\ndrivers/gpu/drm/amd/include/asic_reg/dcn/dcn_4_1_0_offset.h-11436-#define regDCIO_UNIPHY0_UNIPHY_MACRO_CNTL_RESERVED22_BASE_IDX 2\n--\ndrivers/gpu/drm/amd/include/asic_reg/gc/gc_11_0_0_offset.h-7863-#define regCP_MEC_RS64_INTERRUPT_DATA_19_BASE_IDX 1\ndrivers/gpu/drm/amd/include/asic_reg/gc/gc_11_0_0_offset.h:7864:#define regCP_MEC_RS64_INTERRUPT_DATA_20 0x293e\ndrivers/gpu/drm/amd/include/asic_reg/gc/gc_11_0_0_offset.h-7865-#define regCP_MEC_RS64_INTERRUPT_DATA_20_BASE_IDX 1\n--\ndrivers/gpu/drm/amd/include/asic_reg/gc/gc_11_0_3_offset.h-8167-#define regCP_MEC_RS64_INTERRUPT_DATA_19_BASE_IDX 1\ndrivers/gpu/drm/amd/include/asic_reg/gc/gc_11_0_3_offset.h:8168:#define regCP_MEC_RS64_INTERRUPT_DATA_20 0x293e\ndrivers/gpu/drm/amd/include/asic_reg/gc/gc_11_0_3_offset.h-8169-#define regCP_MEC_RS64_INTERRUPT_DATA_20_BASE_IDX 1\n--\ndrivers/gpu/drm/amd/include/asic_reg/gc/gc_11_5_0_offset.h-6636-#define regCP_MEC_RS64_INTERRUPT_DATA_19_BASE_IDX 1\ndrivers/gpu/drm/amd/include/asic_reg/gc/gc_11_5_0_offset.h:6637:#define regCP_MEC_RS64_INTERRUPT_DATA_20 0x293e\ndrivers/gpu/drm/amd/include/asic_reg/gc/gc_11_5_0_offset.h-6638-#define regCP_MEC_RS64_INTERRUPT_DATA_20_BASE_IDX 1\n--\ndrivers/gpu/drm/amd/include/asic_reg/gc/gc_12_0_0_offset.h-5055-#define regCP_MEC_RS64_INTERRUPT_DATA_19_BASE_IDX 1\ndrivers/gpu/drm/amd/include/asic_reg/gc/gc_12_0_0_offset.h:5056:#define regCP_MEC_RS64_INTERRUPT_DATA_20 0x293e\ndrivers/gpu/drm/amd/include/asic_reg/gc/gc_12_0_0_offset.h-5057-#define regCP_MEC_RS64_INTERRUPT_DATA_20_BASE_IDX 1\n--\ndrivers/gpu/drm/amd/include/asic_reg/gc/gc_12_1_0_offset.h-4913-#define regCP_MEC_RS64_INTERRUPT_DATA_19_BASE_IDX 1\ndrivers/gpu/drm/amd/include/asic_reg/gc/gc_12_1_0_offset.h:4914:#define regCP_MEC_RS64_INTERRUPT_DATA_20 0x293e\ndrivers/gpu/drm/amd/include/asic_reg/gc/gc_12_1_0_offset.h-4915-#define regCP_MEC_RS64_INTERRUPT_DATA_20_BASE_IDX 1\n--\ninclude/linux/pci_ids.h-2913-#define PCI_DEVICE_ID_INTEL_ICH9_6\t0x2930\ninclude/linux/pci_ids.h:2914:#define PCI_DEVICE_ID_INTEL_HDA_ICH9_0\t0x293e\ninclude/linux/pci_ids.h-2915-#define PCI_DEVICE_ID_INTEL_HDA_ICH9_1\t0x293f\n" }
69/2	2026/10/27 20:08	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 66174 output: 21 thoughts: 29 Thoughts: Here's my attempt at summarizing the thought process, tailored for an expert audience: Tracing a PCI Device ID Match in the Kernel Okay, so I'm diving into the kernel source to understand how a specific PCI device ID, `PCI_DEVICE_ID_INTEL_HDA_ICH9_0`, is handled. My primary goal here is to identify where this specific ID is being matched. This means I'm looking for the code path, within the kernel's device driver and initialization routines, where this ID is used in a comparison. I anticipate that it will likely be within a probe function, or potentially in a table used for matching devices to drivers. I'll be looking for `pci_device_id` structures, or similar mechanisms, where this `PCI_DEVICE_ID_INTEL_HDA_ICH9_0` is listed. I'll need to then trace from that match point to understand which driver gets bound to this specific hardware. I'll be looking for references to this ID within the Intel HDA Audio subsystem, given the name. The key here is to quickly find the exact match and then understand its context within the driver initialization sequence. This will tell me how the kernel identifies and manages this particular device.
70/2	2026/10/27 20:08	tool	grepper	0m Args: { "Expression": "HDA_ICH9_0" } Results: { "Output": "include/linux/pci_ids.h-2913-#define PCI_DEVICE_ID_INTEL_ICH9_6\t0x2930\ninclude/linux/pci_ids.h:2914:#define PCI_DEVICE_ID_INTEL_HDA_ICH9_0\t0x293e\ninclude/linux/pci_ids.h-2915-#define PCI_DEVICE_ID_INTEL_HDA_ICH9_1\t0x293f\n--\nsound/hda/controllers/intel.c=2507=static const struct pci_device_id azx_ids[] = {\n--\nsound/hda/controllers/intel.c-2637-\t/* ICH9 /\nsound/hda/controllers/intel.c:2638:\t{ PCI_DEVICE_DATA(INTEL, HDA_ICH9_0, AZX_DRIVER_ICH \| AZX_DCAPS_INTEL_ICH) },\nsound/hda/controllers/intel.c-2639-\t/ ICH9 */\n" }
71/2	2026/10/27 20:08	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 66756 output: 19 thoughts: 65 Thoughts: Here's my analysis of the provided information, as though it were my own thought process: Diving into the HDA Driver Matching Okay, so `HDA_ICH9_0`... that specific PCI ID is only matched within the legacy HDA driver code, specifically within `sound/hda/controllers/intel.c`, using the `azx_ids` table. That's a clear indication it's the `snd_hda_intel` driver handling it. That's good to know, but doesn't quite get me where I want to be. I wonder if there is an ICH6 device? Let me quickly check the `HDA_ICH6` define. I can compare it to the ICH9 device, to understand the relationship between the devices.
72/2	2026/10/27 20:08	tool	grepper	0m Args: { "Expression": "HDA_ICH6" } Results: { "Output": "include/linux/pci_ids.h-2869-#define PCI_DEVICE_ID_INTEL_ICH6_2\t0x2642\ninclude/linux/pci_ids.h:2870:#define PCI_DEVICE_ID_INTEL_HDA_ICH6\t0x2668\ninclude/linux/pci_ids.h-2871-#define PCI_DEVICE_ID_INTEL_ICH6_16\t0x266a\n--\nsound/hda/controllers/intel.c=2507=static const struct pci_device_id azx_ids[] = {\n--\nsound/hda/controllers/intel.c-2629-\t/* ICH6 /\nsound/hda/controllers/intel.c:2630:\t{ PCI_DEVICE_DATA(INTEL, HDA_ICH6, AZX_DRIVER_ICH \| AZX_DCAPS_INTEL_ICH) },\nsound/hda/controllers/intel.c-2631-\t/ ICH7 */\n" }
73/2	2026/10/27 20:08	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 67272 output: 191 thoughts: 1587 Thoughts: Analysis of the Code and Fuzzing Suitability Okay, here's what I've got. Both `HDA_ICH6` and `HDA_ICH9_0` are only matched by the `intel.c` driver within `sound/hda/controllers/`. Importantly, these controllers aren't handled by the SOF subsystem in `sound/soc/sof/intel/`. When QEMU probes a codec using `intel.c`, it creates a legacy HDA codec device and binds standard legacy drivers, like `realtek` or `generic` from `sound/hda/codecs/`. Critically, the `bus->core.ext_ops` field is never set. Because `bus->core.ext_ops` is null, the `hdev_attach` callback in `sound/hda/common/bind.c` isn't called. This means the code path that would call the `hdac_hda_dev_probe` function (within `sound/soc/codecs/hdac_hda.c`) is never executed. The `hdev_attach` callback is, however, only defined on the SOF bus. So, neither `hdac_hda.c` nor `sound/soc/sof/intel/hda-codec.c` can be touched without an Intel SOF DSP controller, and that, in turn, requires specific Intel hardware like Skylake, Kaby Lake, etc. – hardware that isn't emulated in standard QEMU or GCE. I've checked other potential avenues, like USB audio (`sound/usb/`), virtio-snd (`sound/virtio/`), dummy/loopback (`sound/drivers/`), and ASoC dummy codecs (`sound/soc/generic/` and `sound/soc/codecs/dummy.c`) but none of these even interact with the HDAC-HDA code. I went back and checked the references to `hdac_hda` again. Aside from the driver files themselves (`hdac_hda.c` and `hdac_hda.h`), I found references in board-specific files like `hda_dsp_common.c`, and within the SOF directory. The `hda-codec.c` file is ONLY referenced within the `sound/soc/sof/intel/` directory. The changes in the code are strictly tied to Intel SOF DSP hardware and fall under the "structurally unreachable hardware" category in the fuzzing guidelines. Furthermore, the changes in `hdac_hda.c` explicitly address unbind/rebind handling, which is a key indicator of logic that's executed only during physical PCI hot-unplug or manual sysfs driver unbinding. This is not something typically seen or relevant in QEMU environments. Both criteria – unreachable hardware and unbind/rebind logic – strongly indicate that this isn't WorthFuzzing. There's no exception. So, let's document the conclusion: * WorthFuzzing: `false` * EnableConfigs: `[]` (or null, an empty list) * FocusSymbols: `[]` (or null, an empty list) * Reasoning: "This patch fixes unbind/rebind issues and runtime PM handling in the Intel Sound Open Firmware (SOF) legacy HDA codec driver (`sound/soc/codecs/hdac_hda.c`) and SOF Intel HDA codec initialization (`sound/soc/sof/intel/hda-codec.c`). The affected code is exclusively instantiated and executed by the Intel SOF audio DSP subsystem (`sound/soc/sof/intel/`), which requires physical Intel SoC/chipset DSP hardware (e.g. Skylake, Tiger Lake, Alder Lake, etc.). This hardware is not emulated by standard QEMU or GCE virtualized environments (standard QEMU only emulates legacy ICH6/ICH9 controllers via `sound/hda/controllers/intel.c`, which does not use the SOF or HDAC-HDA ASoC stack), rendering the code structurally unreachable." That's it, thoroughly done.
74/2	2026/10/27 20:09	tool	set-results	0m Args: { "EnableConfigs": [], "FocusSymbols": [], "Reasoning": "The patch modifies runtime PM and unbind/rebind handling in the Intel Sound Open Firmware (SOF) HDA codec driver (sound/soc/codecs/hdac_hda.c) and SOF codec initialization (sound/soc/sof/intel/hda-codec.c). This code is only reachable through the Intel SOF DSP driver stack, which requires physical Intel audio DSP hardware (e.g., Skylake, Tiger Lake, etc.) not emulated in standard QEMU or GCE virtualized environments (QEMU only emulates legacy ICH6/ICH9 controllers, which use the legacy snd-hda-intel driver instead of the SOF ASoC stack). As such, the modified code is structurally unreachable for fuzzing.", "WorthFuzzing": false } Results: { "EnableConfigs": null, "FocusSymbols": [], "Reasoning": "The patch modifies runtime PM and unbind/rebind handling in the Intel Sound Open Firmware (SOF) HDA codec driver (sound/soc/codecs/hdac_hda.c) and SOF codec initialization (sound/soc/sof/intel/hda-codec.c). This code is only reachable through the Intel SOF DSP driver stack, which requires physical Intel audio DSP hardware (e.g., Skylake, Tiger Lake, etc.) not emulated in standard QEMU or GCE virtualized environments (QEMU only emulates legacy ICH6/ICH9 controllers, which use the legacy snd-hda-intel driver instead of the SOF ASoC stack). As such, the modified code is structurally unreachable for fuzzing.", "WorthFuzzing": false }
75/1	2026/10/27 20:09	action	If	0m Args: { "WorthFuzzing": false } Results: null

LLM Calls Summary:
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Tool Calls Summary:
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