From: Alex Deucher Date: Thu, 19 Apr 2012 14:48:38 +0000 (-0400) Subject: drm/radeon/kms: use frac fb div on APUs X-Git-Tag: firefly_0821_release~3680^2~2989^2 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=37d4174d2d252c37dcb3d88cafae488542087848;p=firefly-linux-kernel-4.4.55.git drm/radeon/kms: use frac fb div on APUs Seems to be more stable on certain monitors. Fixes: https://bugs.freedesktop.org/show_bug.cgi?id=48880 Signed-off-by: Alex Deucher Cc: stable@vger.kernel.org Signed-off-by: Dave Airlie --- diff --git a/drivers/gpu/drm/radeon/atombios_crtc.c b/drivers/gpu/drm/radeon/atombios_crtc.c index b5ff1f7b6f7e..c5c31e091a92 100644 --- a/drivers/gpu/drm/radeon/atombios_crtc.c +++ b/drivers/gpu/drm/radeon/atombios_crtc.c @@ -575,6 +575,9 @@ static u32 atombios_adjust_pll(struct drm_crtc *crtc, if (rdev->family < CHIP_RV770) pll->flags |= RADEON_PLL_PREFER_MINM_OVER_MAXP; + /* use frac fb div on APUs */ + if (ASIC_IS_DCE41(rdev) || ASIC_IS_DCE61(rdev)) + pll->flags |= RADEON_PLL_USE_FRAC_FB_DIV; } else { pll->flags |= RADEON_PLL_LEGACY;