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Commit 7fe04d6f authored by Alex Deucher's avatar Alex Deucher
Browse files

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: default avatarAlex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
parent 38aef154

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 */