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

ChristianKoenigAMD · alexdeucher · commit ae5b80d2b68e · 2016-08-18T11:17:48.000-04:00
Looks like some RV6xx have problems with that. bug: https://bugs.freedesktop.org/show_bug.cgi?id=97099 Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Cc: stable@vger.kernel.org
diff --git a/drivers/gpu/drm/radeon/atombios_crtc.c b/drivers/gpu/drm/radeon/atombios_crtc.c
@@ -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;
 			}
 		}

Original file line number	Diff line number	Diff line change
`@@ -627,7 +627,9 @@ static u32 atombios_adjust_pll(struct drm_crtc *crtc,`
`627`	`627`	`if (radeon_crtc->ss.refdiv) {`
`628`	`628`	`radeon_crtc->pll_flags \|= RADEON_PLL_USE_REF_DIV;`
`629`	`629`	`radeon_crtc->pll_reference_div = radeon_crtc->ss.refdiv;`
`630`		`- if (rdev->family >= CHIP_RV770)`
	`630`	`+ if (ASIC_IS_AVIVO(rdev) &&`
	`631`	`+ rdev->family != CHIP_RS780 &&`
	`632`	`+ rdev->family != CHIP_RS880)`
`631`	`633`	`radeon_crtc->pll_flags \|= RADEON_PLL_USE_FRAC_FB_DIV;`
`632`	`634`	`}`
`633`	`635`	`}`