From: Alex Deucher Date: Sun, 19 Apr 2015 16:01:00 +0000 (-0400) Subject: drm/radeon: adjust pll when audio is not enabled X-Git-Tag: MMI-PSA29.97-13-9~10132^2~2^2~5 X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=7fe04d6fa824ccea704535a597dc417c8687f990;p=GitHub%2FMotorolaMobilityLLC%2Fkernel-slsi.git drm/radeon: adjust pll when audio is not enabled 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 Cc: stable@vger.kernel.org --- diff --git a/drivers/gpu/drm/radeon/atombios_crtc.c b/drivers/gpu/drm/radeon/atombios_crtc.c index dac78ad24b31..42b2ea3fdcf3 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 */