Am 23.05.2017 um 23:26 schrieb Alex Deucher: > Even if the vblank period would allow it, it still seems to > be problematic on some cards. > > v2: fix logic inversion (Nils) > > bug: https://bugs.freedesktop.org/show_bug.cgi?id=96868 > > Signed-off-by: Alex Deucher <alexander.deucher at amd.com> Acked-by: Christian König <christian.koenig at amd.com> for the whole series. > --- > drivers/gpu/drm/amd/amdgpu/ci_dpm.c | 6 ++++++ > 1 file changed, 6 insertions(+) > > diff --git a/drivers/gpu/drm/amd/amdgpu/ci_dpm.c b/drivers/gpu/drm/amd/amdgpu/ci_dpm.c > index 6dc1410..ec93714 100644 > --- a/drivers/gpu/drm/amd/amdgpu/ci_dpm.c > +++ b/drivers/gpu/drm/amd/amdgpu/ci_dpm.c > @@ -906,6 +906,12 @@ static bool ci_dpm_vblank_too_short(struct amdgpu_device *adev) > u32 vblank_time = amdgpu_dpm_get_vblank_time(adev); > u32 switch_limit = adev->mc.vram_type == AMDGPU_VRAM_TYPE_GDDR5 ? 450 : 300; > > + /* disable mclk switching if the refresh is >120Hz, even if the > + * blanking period would allow it > + */ > + if (amdgpu_dpm_get_vrefresh(adev) > 120) > + return true; > + > if (vblank_time < switch_limit) > return true; > else
