leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

drm/amdgpu: update comments about s0ix suspend/resume

Browse Source 
Provide and explanation as to why we skip GFX and PSP for
S0ix.  GFX goes into gfxoff, same as runtime, so no need
to tear down and re-init.  PSP is part of the always on
state, so no need to touch it.

Acked-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2021-03-16 14:00:36 -04:00
parent 4021229e32
commit 9bb735abcb
1 changed files with 7 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
View File

@ -2737,10 +2737,14 @@ static int amdgpu_device_ip_suspend_phase2(struct amdgpu_device *adev)
continue;
}
/* XXX fix these remaining cases */
/* skip suspend of gfx and psp for S0ix
* gfx is in gfxoff state, so on resume it will exit gfxoff just
* like at runtime. PSP is also part of the always on hardware
* so no need to suspend it.
*/
if (adev->in_s0ix &&
(adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_PSP || /* breaks resume */
adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_GFX)) /* breaks suspend */
(adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_PSP ||
adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_GFX))
continue;
/* XXX handle errors */