mirrors/linux
2
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2026-08-31 14:04:27 -04:00
Code Issues Packages Projects Releases Wiki Activity

drm/amdgpu: Prefer default discovery offset

Browse Source 
If a valid signature is seen at the default offset, use the default
size/offset for discovery.

Fixes: 01bdc7e219 ("drm/amdgpu: New interface to get IP discovery binary v3")
Closes: https://gitlab.freedesktop.org/drm/amd/-/work_items/5447
Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 46a0df99a0)
Cc: stable@vger.kernel.org
This commit is contained in:
Lijo Lazar
2026-07-13 16:34:24 +05:30
committed by Alex Deucher
parent 9fca434208
commit ac828b94e0
1 changed files with 13 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c
View File

@@ -311,6 +311,19 @@ static int amdgpu_discovery_get_tmr_info(struct amdgpu_device *adev,
goto out;
}
} else {
if (adev->discovery.offset) {
u32 signature;
/* If VRAM holds a valid discovery signature at the default
* discovery offset, use it as-is.
*/
amdgpu_device_vram_access(adev, adev->discovery.offset,
&signature, sizeof(signature),
false);
if (le32_to_cpu(signature) == BINARY_SIGNATURE)
goto out;
}
tmr_size = RREG32(mmDRIVER_SCRATCH_2);
if (tmr_size) {
/* It's preferred to transition to PSP mailbox reg interface