[AMD Official Use Only] Reviewed-by: Evan Quan <[email protected]>
> -----Original Message----- > From: amd-gfx <[email protected]> On Behalf Of > Michel Dänzer > Sent: Thursday, August 12, 2021 12:52 AM > To: Deucher, Alexander <[email protected]>; Koenig, Christian > <[email protected]> > Cc: Liu, Leo <[email protected]>; Zhu, James <[email protected]>; amd- > [email protected]; [email protected] > Subject: [PATCH 1/2] drm/amdgpu: Use mod_delayed_work in > amdgpu_gfx_off_ctrl > > From: Michel Dänzer <[email protected]> > > In contrast to schedule_delayed_work, this pushes back the work if it > was already scheduled before. Specific behaviour change: > > Before: > > amdgpu_device_delay_enable_gfx_off ran ~100 ms after the first time > GFXOFF was disabled and re-enabled, even if GFXOFF was disabled and > re-enabled again during those 100 ms. > > After: > > amdgpu_device_delay_enable_gfx_off runs ~100 ms after the last time > GFXOFF is disabled and re-enabled. > > The former resulted in frame drops / stutter with the upcoming mutter > 41 release on Navi 14, due to constantly enabling GFXOFF in the HW and > disabling it again (for getting the GPU clock counter). > > Signed-off-by: Michel Dänzer <[email protected]> > --- > drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c > b/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c > index a0be0772c8b3..9cfef56b2aee 100644 > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c > @@ -569,7 +569,7 @@ void amdgpu_gfx_off_ctrl(struct amdgpu_device > *adev, bool enable) > adev->gfx.gfx_off_req_count--; > > if (enable && !adev->gfx.gfx_off_state && !adev- > >gfx.gfx_off_req_count) { > - schedule_delayed_work(&adev->gfx.gfx_off_delay_work, > GFX_OFF_DELAY_ENABLE); > + mod_delayed_work(system_wq, &adev- > >gfx.gfx_off_delay_work, GFX_OFF_DELAY_ENABLE); > } else if (!enable && adev->gfx.gfx_off_state) { > if (!amdgpu_dpm_set_powergating_by_smu(adev, > AMD_IP_BLOCK_TYPE_GFX, false)) { > adev->gfx.gfx_off_state = false; > -- > 2.32.0
