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drm/amdgpu: During s0ix don't wait to signal GFXOFF

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In the rare event when GFX IP suspend coincides with a s0ix entry, don't
schedule a delayed work, instead signal PMFW immediately to allow GFXOFF
entry. GFXOFF is a prerequisite for s0ix entry. PMFW needs to be
signaled about GFXOFF status before amd-pmc module passes OS HINT
to PMFW telling that everything is ready for a safe s0ix entry.

Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1712

Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Mario Limonciello <mario.limonciell@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
This commit is contained in:
Lijo Lazar 2021-10-01 16:49:07 +08:00 committed by Alex Deucher
parent d08ce8c6d2
commit 1d617c029f
1 changed files with 12 additions and 2 deletions
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14
drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c
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@ -31,6 +31,8 @@
/* delay 0.1 second to enable gfx off feature */
#define GFX_OFF_DELAY_ENABLE msecs_to_jiffies(100)
#define GFX_OFF_NO_DELAY 0
/*
* GPU GFX IP block helpers function.
*/
@ -558,6 +560,8 @@ int amdgpu_gfx_enable_kcq(struct amdgpu_device *adev)
void amdgpu_gfx_off_ctrl(struct amdgpu_device *adev, bool enable)
{
unsigned long delay = GFX_OFF_DELAY_ENABLE;
if (!(adev->pm.pp_feature & PP_GFXOFF_MASK))
return;
@ -573,8 +577,14 @@ void amdgpu_gfx_off_ctrl(struct amdgpu_device *adev, bool enable)
adev->gfx.gfx_off_req_count--;
if (adev->gfx.gfx_off_req_count == 0 && !adev->gfx.gfx_off_state)
schedule_delayed_work(&adev->gfx.gfx_off_delay_work, GFX_OFF_DELAY_ENABLE);
if (adev->gfx.gfx_off_req_count == 0 &&
!adev->gfx.gfx_off_state) {
/* If going to s2idle, no need to wait */
if (adev->in_s0ix)
delay = GFX_OFF_NO_DELAY;
schedule_delayed_work(&adev->gfx.gfx_off_delay_work,
delay);
}
} else {
if (adev->gfx.gfx_off_req_count == 0) {
cancel_delayed_work_sync(&adev->gfx.gfx_off_delay_work);