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| author | Alex Deucher <alexander.deucher@amd.com> | 2015-04-19 12:01:00 -0400 |
|---|---|---|
| committer | Sasha Levin <sasha.levin@oracle.com> | 2015-05-17 19:12:42 -0400 |
| commit | 572a8eae2a3ecef257da83e511528c58271d2031 (patch) | |
| tree | 3f4c47aad71fc8a0c123a4472f760a0092fe4cdb | |
| parent | 742b16a2694dbb9a218306e72579a0174698ce96 (diff) | |
| download | lwn-572a8eae2a3ecef257da83e511528c58271d2031.tar.gz lwn-572a8eae2a3ecef257da83e511528c58271d2031.zip | |
drm/radeon: adjust pll when audio is not enabled
[ Upstream commit 7fe04d6fa824ccea704535a597dc417c8687f990 ]
Fixes display problems with some monitors when audio
is not enabled.
Bugs:
https://bugs.freedesktop.org/show_bug.cgi?id=89505
https://bugzilla.kernel.org/show_bug.cgi?id=94171
Plus several reports on IRC.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
| -rw-r--r-- | drivers/gpu/drm/radeon/atombios_crtc.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/atombios_crtc.c b/drivers/gpu/drm/radeon/atombios_crtc.c index ce8cab52285b..5d73e5f3845d 100644 --- a/drivers/gpu/drm/radeon/atombios_crtc.c +++ b/drivers/gpu/drm/radeon/atombios_crtc.c @@ -580,6 +580,9 @@ static u32 atombios_adjust_pll(struct drm_crtc *crtc, else radeon_crtc->pll_flags |= RADEON_PLL_PREFER_LOW_REF_DIV; + /* if there is no audio, set MINM_OVER_MAXP */ + if (!drm_detect_monitor_audio(radeon_connector_edid(connector))) + radeon_crtc->pll_flags |= RADEON_PLL_PREFER_MINM_OVER_MAXP; if (rdev->family < CHIP_RV770) radeon_crtc->pll_flags |= RADEON_PLL_PREFER_MINM_OVER_MAXP; /* use frac fb div on APUs */ |