drm/radeon/kms: pll tweaks for rv6xx
Prefer minm over maxp.
Fixes:
https://bugs.freedesktop.org/show_bug.cgi?id=35994
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Cc: stable@kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/radeon/atombios_crtc.c b/drivers/gpu/drm/radeon/atombios_crtc.c
index b41ec59..9d516a8 100644
--- a/drivers/gpu/drm/radeon/atombios_crtc.c
+++ b/drivers/gpu/drm/radeon/atombios_crtc.c
@@ -531,6 +531,12 @@
pll->flags |= RADEON_PLL_PREFER_HIGH_FB_DIV;
else
pll->flags |= RADEON_PLL_PREFER_LOW_REF_DIV;
+
+ if ((rdev->family == CHIP_R600) ||
+ (rdev->family == CHIP_RV610) ||
+ (rdev->family == CHIP_RV630) ||
+ (rdev->family == CHIP_RV670))
+ pll->flags |= RADEON_PLL_PREFER_MINM_OVER_MAXP;
} else {
pll->flags |= RADEON_PLL_LEGACY;