diff options
| author | Timur Kristóf <timur.kristof@gmail.com> | 2025-08-28 17:11:09 +0200 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2025-09-02 15:55:44 -0400 |
| commit | ed3803533c7bf7df88bc3fc9f70bd317e1228ea8 (patch) | |
| tree | 4e10a87af57f804b51945632cec6ce93b54c7fb0 /drivers/gpu/drm/amd | |
| parent | 9003a0746864f39a0ef72bd45f8e1ad85d930d67 (diff) | |
drm/amd/pm: Disable MCLK switching with non-DC at 120 Hz+ (v2)
According to pp_pm_compute_clocks the non-DC display code
has "issues with mclk switching with refresh rates over 120 hz".
The workaround is to disable MCLK switching in this case.
Do the same for legacy DPM.
Fixes: 6ddbd37f1074 ("drm/amd/pm: optimize the amdgpu_pm_compute_clocks() implementations")
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd')
| -rw-r--r-- | drivers/gpu/drm/amd/pm/amdgpu_dpm_internal.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/pm/amdgpu_dpm_internal.c b/drivers/gpu/drm/amd/pm/amdgpu_dpm_internal.c index 42efe838fa85..2d2d2d5e6763 100644 --- a/drivers/gpu/drm/amd/pm/amdgpu_dpm_internal.c +++ b/drivers/gpu/drm/amd/pm/amdgpu_dpm_internal.c @@ -66,6 +66,13 @@ u32 amdgpu_dpm_get_vblank_time(struct amdgpu_device *adev) (amdgpu_crtc->v_border * 2)); vblank_time_us = vblank_in_pixels * 1000 / amdgpu_crtc->hw_mode.clock; + + /* we have issues with mclk switching with + * refresh rates over 120 hz on the non-DC code. + */ + if (drm_mode_vrefresh(&amdgpu_crtc->hw_mode) > 120) + vblank_time_us = 0; + break; } } |