This is a note to let you know that I've just added the patch titled
drm/admgpu: Skip CG/PG on SOC21 under SRIOV VF
to the 6.0-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-admgpu-skip-cg-pg-on-soc21-under-sriov-vf.patch
and it can be found in the queue-6.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit c47f2cb89da2d1773407b1bee6e0d311f6fe7489
Author: Yifan Zha <Yifan.Zha@xxxxxxx>
Date: Fri Aug 19 11:02:19 2022 +0800
drm/admgpu: Skip CG/PG on SOC21 under SRIOV VF
[ Upstream commit 828418259254863e0af5805bd712284e2bd88e3b ]
[Why]
There is no CG(Clock Gating)/PG(Power Gating) requirement on SRIOV VF.
For multi VF, VF should not enable any CG/PG features.
For one VF, PF will program CG/PG related registers.
[How]
Do not set any cg/pg flag bit at early init under sriov.
Acked-by: Christian König <christian.koenig@xxxxxxx>
Signed-off-by: Yifan Zha <Yifan.Zha@xxxxxxx>
Reviewed-by: Hawking Zhang <Hawking.Zhang@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/amd/amdgpu/soc21.c b/drivers/gpu/drm/amd/amdgpu/soc21.c
index 276ff6709881..9c3463b48139 100644
--- a/drivers/gpu/drm/amd/amdgpu/soc21.c
+++ b/drivers/gpu/drm/amd/amdgpu/soc21.c
@@ -583,6 +583,10 @@ static int soc21_common_early_init(void *handle)
AMD_PG_SUPPORT_JPEG |
AMD_PG_SUPPORT_ATHUB |
AMD_PG_SUPPORT_MMHUB;
+ if (amdgpu_sriov_vf(adev)) {
+ adev->cg_flags = 0;
+ adev->pg_flags = 0;
+ }
adev->external_rev_id = adev->rev_id + 0x1; // TODO: need update
break;
case IP_VERSION(11, 0, 2):
