From a02dc74b317d78298cb0587b9b1f6f741fd5c139 Mon Sep 17 00:00:00 2001 From: Alex Deucher Date: Tue, 13 Nov 2012 18:03:41 -0500 Subject: [PATCH] drm/radeon/dce32+: use fractional fb dividers for high clocks Fixes flickering with some high res montiors. Signed-off-by: Alex Deucher CC: stable@vger.kernel.org --- drivers/gpu/drm/radeon/atombios_crtc.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/radeon/atombios_crtc.c b/drivers/gpu/drm/radeon/atombios_crtc.c index 24d932f..9175615 100644 --- a/drivers/gpu/drm/radeon/atombios_crtc.c +++ b/drivers/gpu/drm/radeon/atombios_crtc.c @@ -561,6 +561,8 @@ static u32 atombios_adjust_pll(struct drm_crtc *crtc, /* use frac fb div on APUs */ if (ASIC_IS_DCE41(rdev) || ASIC_IS_DCE61(rdev)) radeon_crtc->pll_flags |= RADEON_PLL_USE_FRAC_FB_DIV; + if (ASIC_IS_DCE32(rdev) && mode->clock > 165000) + radeon_crtc->pll_flags |= RADEON_PLL_USE_FRAC_FB_DIV; } else { radeon_crtc->pll_flags |= RADEON_PLL_LEGACY; -- 2.7.4