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drm/amdgpu: skipping SDMA hw_init and hw_fini for S0ix.

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commit f8f4e2a518 upstream.

[Why]
SDMA ring buffer test failed if suspend is aborted during
S0i3 resume.

[How]
If suspend is aborted for some reason during S0i3 resume
cycle, it follows SDMA ring test failing and errors in amdgpu
resume. For RN/CZN/Picasso, SMU saves and restores SDMA
registers during S0ix cycle. So, skipping SDMA suspend and
resume from driver solves the issue. This time, the system
is able to resume gracefully even the suspend is aborted.

Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Rajib Mahapatra <rajib.mahapatra@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Rajib Mahapatra
2022-02-10 18:46:40 +05:30
committed by Greg Kroah-Hartman
parent 3851046599
commit 960c8a5501
1 changed files with 8 additions and 0 deletions
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8
drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
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@@ -2062,6 +2062,10 @@ static int sdma_v4_0_suspend(void *handle)
{
struct amdgpu_device *adev = (struct amdgpu_device *)handle;
/* SMU saves SDMA state for us */
if (adev->in_s0ix)
return 0;
return sdma_v4_0_hw_fini(adev);
}
@@ -2069,6 +2073,10 @@ static int sdma_v4_0_resume(void *handle)
{
struct amdgpu_device *adev = (struct amdgpu_device *)handle;
/* SMU restores SDMA state for us */
if (adev->in_s0ix)
return 0;
return sdma_v4_0_hw_init(adev);
}