Store the physical base address of the GPU MMIO region in
TyrDrmDeviceData.

This will be used by the Panthor userspace-MMIO mmap path to derive the
physical PFNs inserted into userspace VMAs for USER register page
mappings.

Co-developed-by: Daniel Almeida <daniel.almeida@collabora.com>
Signed-off-by: Daniel Almeida <daniel.almeida@collabora.com>
Signed-off-by: Deborah Brouwer <deborah.brouwer@collabora.com>
---
 drivers/gpu/drm/tyr/driver.rs | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/tyr/driver.rs b/drivers/gpu/drm/tyr/driver.rs
index e20a5978eed6..2ba0a22a225b 100644
--- a/drivers/gpu/drm/tyr/driver.rs
+++ b/drivers/gpu/drm/tyr/driver.rs
@@ -19,7 +19,8 @@
     drm::ioctl,
     io::{
         poll,
-        Io, //
+        Io,
+        PhysAddr, //
     },
     new_mutex,
     of,
@@ -60,6 +61,9 @@ pub(crate) struct TyrPlatformDriverData {
 pub(crate) struct TyrDrmDeviceData {
     pub(crate) pdev: ARef<platform::Device>,
 
+    /// Physical base address of the MMIO region.
+    pub(crate) mmio_phys_addr: PhysAddr,
+
     #[pin]
     clks: Mutex<Clocks>,
 
@@ -119,6 +123,7 @@ fn probe(
         let mali_regulator = Regulator::<regulator::Enabled>::get(pdev.as_ref(), c"mali")?;
         let sram_regulator = Regulator::<regulator::Enabled>::get(pdev.as_ref(), c"sram")?;
 
+        let mmio_phys_addr = pdev.resource_by_index(0).ok_or(ENODEV)?.start();
         let request = pdev.io_request_by_index(0).ok_or(ENODEV)?;
         let iomem = Arc::pin_init(request.iomap_sized::<SZ_2M>(), GFP_KERNEL)?;
 
@@ -140,6 +145,7 @@ fn probe(
 
         let data = try_pin_init!(TyrDrmDeviceData {
                 pdev: platform.clone(),
+                mmio_phys_addr,
                 clks <- new_mutex!(Clocks {
                     core: core_clk,
                     stacks: stacks_clk,

-- 
2.53.0