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 15:06:06 -0700 |
| commit | 0157e2a8a71978c58a7d6cfb3616ab17d9726631 (patch) | |
| tree | 2a04b6fe52cd7436e5c62b2b7a91c6f0513a6a9c | |
| parent | ad2efae4613d2090ec7a5654429bf3ff08ea309b (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>
| -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 3c32f095a873..2ccf81168d1e 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 |