Commit 572a8eae authored Apr 19, 2015 by Alex Deucher Committed by Sasha Levin May 17, 2015

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>

parent 742b16a2

drivers/gpu/drm/radeon/atombios_crtc.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -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 */