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Commit ae5b80d2 authored by Christian König's avatar Christian König Committed by Alex Deucher
Browse files

drm/radeon: only apply the SS fractional workaround to RS[78]80 

Looks like some RV6xx have problems with that.

bug:
https://bugs.freedesktop.org/show_bug.cgi?id=97099



Reviewed-by: default avatarAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: default avatarChristian König <christian.koenig@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
parent 91d62d9f

drivers/gpu/drm/radeon/atombios_crtc.c

+3 −1
Original line number Diff line number Diff line
@@ -627,7 +627,9 @@ static u32 atombios_adjust_pll(struct drm_crtc *crtc, 
			if (radeon_crtc->ss.refdiv) {

				radeon_crtc->pll_flags |= RADEON_PLL_USE_REF_DIV;

				radeon_crtc->pll_reference_div = radeon_crtc->ss.refdiv;

				if (rdev->family >= CHIP_RV770)

				if (ASIC_IS_AVIVO(rdev) &&

				    rdev->family != CHIP_RS780 &&

				    rdev->family != CHIP_RS880)

					radeon_crtc->pll_flags |= RADEON_PLL_USE_FRAC_FB_DIV;

			}

		}