From 411678288d61ba17afe1f8afed92200be6bbc65d Mon Sep 17 00:00:00 2001 From: Alex Deucher Date: Mon, 1 Apr 2013 16:06:25 -0400 Subject: [PATCH] drm/radeon: use frac fb div on RS780/RS880 Monitors seem to prefer it. Fixes: https://bugs.freedesktop.org/show_bug.cgi?id=37696 Signed-off-by: Alex Deucher Cc: stable@vger.kernel.org --- drivers/gpu/drm/radeon/atombios_crtc.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/radeon/atombios_crtc.c b/drivers/gpu/drm/radeon/atombios_crtc.c index 21a892c6ab9c..6d6fdb3ba0d0 100644 --- a/drivers/gpu/drm/radeon/atombios_crtc.c +++ b/drivers/gpu/drm/radeon/atombios_crtc.c @@ -557,6 +557,9 @@ 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; + /* use frac fb div on RS780/RS880 */ + if ((rdev->family == CHIP_RS780) || (rdev->family == CHIP_RS880)) + 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 { -- 2.20.1