This is a note to let you know that I've just added the patch titled
drm/amdgpu: Avoid fetching vram vendor information
to the 6.7-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-amdgpu-avoid-fetching-vram-vendor-information.patch
and it can be found in the queue-6.7 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 90751bdeee4e3ac87ebf814bf282b0fa97edfeab Mon Sep 17 00:00:00 2001
From: Lijo Lazar <lijo.lazar@xxxxxxx>
Date: Sat, 20 Jan 2024 13:32:51 +0530
Subject: drm/amdgpu: Avoid fetching vram vendor information
From: Lijo Lazar <lijo.lazar@xxxxxxx>
commit 90751bdeee4e3ac87ebf814bf282b0fa97edfeab upstream.
For GFX 9.4.3 APUs, the current method of fetching vram vendor
information is not reliable. Avoid fetching the information.
Signed-off-by: Lijo Lazar <lijo.lazar@xxxxxxx>
Reviewed-by: Hawking Zhang <Hawking.Zhang@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx # 6.7.x
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
@@ -1950,7 +1950,8 @@ static void gmc_v9_4_3_init_vram_info(st
static const u32 regBIF_BIOS_SCRATCH_4 = 0x50;
u32 vram_info;
- if (!amdgpu_sriov_vf(adev)) {
+ /* Only for dGPU, vendor informaton is reliable */
+ if (!amdgpu_sriov_vf(adev) && !(adev->flags & AMD_IS_APU)) {
vram_info = RREG32(regBIF_BIOS_SCRATCH_4);
adev->gmc.vram_vendor = vram_info & 0xF;
}
Patches currently in stable-queue which might be from lijo.lazar@xxxxxxx are
queue-6.7/drm-amdgpu-show-vram-vendor-only-if-available.patch
queue-6.7/drm-amd-pm-add-error-log-for-smu-v13.0.6-reset.patch
queue-6.7/drm-amdgpu-pm-fix-the-power-source-flag-error.patch
queue-6.7/drm-amd-pm-fix-smuv13.0.6-current-clock-reporting.patch
queue-6.7/drm-amd-pm-fetch-current-power-limit-from-fw.patch
queue-6.7/drm-amdgpu-avoid-fetching-vram-vendor-information.patch
