diff options
| author | Alex Deucher <alexander.deucher@amd.com> | 2017-05-11 13:14:14 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-07-27 15:08:02 -0700 |
| commit | a844f8d2a564d00d0043487d860a82d303b1a313 (patch) | |
| tree | bf65ff84e12ebc02dbb0cd1ed6e6fa6d55cb6029 /drivers | |
| parent | b85007c9114a05c696c46c2aac6da68aeaed7bbc (diff) | |
drm/radeon/ci: disable mclk switching for high refresh rates (v2)
commit ab03d9fe508f4e2914a8f4a9eef1b21051cacd0f upstream.
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
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/radeon/ci_dpm.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/ci_dpm.c b/drivers/gpu/drm/radeon/ci_dpm.c index ea36dc4dd5d2..24810492d2c1 100644 --- a/drivers/gpu/drm/radeon/ci_dpm.c +++ b/drivers/gpu/drm/radeon/ci_dpm.c @@ -782,6 +782,12 @@ bool ci_dpm_vblank_too_short(struct radeon_device *rdev) if (r600_dpm_get_vrefresh(rdev) > 120) return true; + /* disable mclk switching if the refresh is >120Hz, even if the + * blanking period would allow it + */ + if (r600_dpm_get_vrefresh(rdev) > 120) + return true; + if (vblank_time < switch_limit) return true; else |