drm/radeon/kms: don't default display priority to high on rs4xx
Seems to cause issues with the sound hardware. Fixes kernel
bug 15982:
https://bugzilla.kernel.org/show_bug.cgi?id=15982
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/radeon_display.c b/drivers/gpu/drm/radeon/radeon_display.c
index da85cad..1006549 100644
--- a/drivers/gpu/drm/radeon/radeon_display.c
+++ b/drivers/gpu/drm/radeon/radeon_display.c
@@ -983,8 +983,11 @@
/* set display priority to high for r3xx, rv515 chips
* this avoids flickering due to underflow to the
* display controllers during heavy acceleration.
+ * Don't force high on rs4xx igp chips as it seems to
+ * affect the sound card. See kernel bug 15982.
*/
- if (ASIC_IS_R300(rdev) || (rdev->family == CHIP_RV515))
+ if ((ASIC_IS_R300(rdev) || (rdev->family == CHIP_RV515)) &&
+ !(rdev->flags & RADEON_IS_IGP))
rdev->disp_priority = 2;
else
rdev->disp_priority = 0;