From aa3dcb884155e65d984e478a929dc73789b9e966 Mon Sep 17 00:00:00 2001 From: Alex Deucher Date: Thu, 19 Apr 2012 10:42:55 -0400 Subject: [PATCH] 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 --- drivers/gpu/drm/radeon/atombios_crtc.c | 3 +++ 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 b5ff1f7..c5c31e0 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; -- 1.7.7.5