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drm/tyr: set DMA mask using GPU physical address

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Configure the device DMA mask during probe using the GPU's physical
address capability reported in GpuInfo. This ensures DMA allocations
use an appropriate address mask.

Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com>
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Signed-off-by: Beata Michalska <beata.michalska@arm.com>
Co-developed-by: Deborah Brouwer <deborah.brouwer@collabora.com>
Signed-off-by: Deborah Brouwer <deborah.brouwer@collabora.com>
Link: https://patch.msgid.link/20260428-fw-boot-prerequisites-v1-4-c69af9abe1af@collabora.com
Signed-off-by: Alice Ryhl <aliceryhl@google.com>
This commit is contained in:
Beata Michalska 2026-04-28 12:19:31 -07:00 committed by Alice Ryhl
parent 09a796e706
commit a9bc67761d
1 changed files with 12 additions and 0 deletions
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12
drivers/gpu/drm/tyr/driver.rs
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@ -11,6 +11,10 @@
Device, //
},
devres::Devres,
dma::{
Device as DmaDevice,
DmaMask, //
},
drm,
drm::ioctl,
io::{
@ -124,6 +128,14 @@ fn probe(
let gpu_info = GpuInfo::new(pdev.as_ref(), &iomem)?;
gpu_info.log(pdev.as_ref());
let pa_bits = MMU_FEATURES::from_raw(gpu_info.mmu_features)
.pa_bits()
.get();
// SAFETY: No concurrent DMA allocations or mappings can be made because
// the device is still being probed and therefore isn't being used by
// other threads of execution.
unsafe { pdev.dma_set_mask_and_coherent(DmaMask::try_new(pa_bits)?)? };
let platform: ARef<platform::Device> = pdev.into();
let data = try_pin_init!(TyrDrmDeviceData {