| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.0 66/72] drm/radeon: adjust pll when audio is not enabled | Date | Mon, 11 May 2015 10:55:12 -0700 |
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4.0-stable review patch. If anyone has any objections, please let me know.
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From: Alex Deucher <alexander.deucher@amd.com>
commit 7fe04d6fa824ccea704535a597dc417c8687f990 upstream.
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> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- drivers/gpu/drm/radeon/atombios_crtc.c | 3 +++ 1 file changed, 3 insertions(+)
--- 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 dr 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 */
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