drm/radeon/kms: rework scaler handling
Keep requested scaler type in radeon_encoder
and the actual scaler type used in radeon_crtc.
This prevents us from enabling the scaler when it's
not required (i.e., the requested mode is the native
mode). Also, always set the adjusted mode equal
to the native mode for lvds.
Should fix:
https://bugzilla.redhat.com/show_bug.cgi?id=522271
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Acked-by: Jerome Glisse <jglisse@redhat.com>
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 8b117e8..5859109 100644
--- a/drivers/gpu/drm/radeon/radeon_display.c
+++ b/drivers/gpu/drm/radeon/radeon_display.c
@@ -750,9 +750,17 @@
if (encoder->crtc != crtc)
continue;
if (first) {
- radeon_crtc->rmx_type = radeon_encoder->rmx_type;
+ /* set scaling */
+ if (radeon_encoder->rmx_type == RMX_OFF)
+ radeon_crtc->rmx_type = RMX_OFF;
+ else if (mode->hdisplay < radeon_encoder->native_mode.hdisplay ||
+ mode->vdisplay < radeon_encoder->native_mode.vdisplay)
+ radeon_crtc->rmx_type = radeon_encoder->rmx_type;
+ else
+ radeon_crtc->rmx_type = RMX_OFF;
+ /* copy native mode */
memcpy(&radeon_crtc->native_mode,
- &radeon_encoder->native_mode,
+ &radeon_encoder->native_mode,
sizeof(struct drm_display_mode));
first = false;
} else {