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authorAlex Deucher <alexander.deucher@amd.com>2012-04-19 18:48:38 +0400
committerDave Airlie <airlied@redhat.com>2012-04-27 11:30:19 +0400
commit37d4174d2d252c37dcb3d88cafae488542087848 (patch)
tree41ecaaf98e3bc615fdb39e7752102b0886da8652 /drivers/gpu/drm/radeon/atombios_crtc.c
parentdf391c0df49560c7fceffbad5b9d083836d9f22f (diff)
downloadlinux-37d4174d2d252c37dcb3d88cafae488542087848.tar.xz
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 <alexander.deucher@amd.com> Cc: stable@vger.kernel.org Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/radeon/atombios_crtc.c')
-rw-r--r--drivers/gpu/drm/radeon/atombios_crtc.c3
1 files changed, 3 insertions, 0 deletions
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;