[Intel-gfx] [PATCH 12/21 v2] drm/i915: Ensure colorkey and scaling aren't enabled at same time

[Chandra Konduru]

Plane scaling and colorkey are mutually exclusive. Ensure scaling
isn't active at the time of enabling colorkey.

Signed-off-by: Chandra Konduru <chandra.konduru at intel.com>
---
 drivers/gpu/drm/i915/intel_sprite.c |    6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_sprite.c b/drivers/gpu/drm/i915/intel_sprite.c
index c010528..0194390 100644
--- a/drivers/gpu/drm/i915/intel_sprite.c
+++ b/drivers/gpu/drm/i915/intel_sprite.c
@@ -319,6 +319,12 @@ skl_update_colorkey(struct drm_plane *drm_plane,
 	const int plane = intel_plane->plane;
 	u32 plane_ctl;
 
+	/* plane scaling and colorkey are mutually exclusive */
+	if (to_intel_plane_state(drm_plane->state)->scaler_id >= 0) {
+		DRM_ERROR("colorkey not allowed with scaler\n");
+		return -EINVAL;
+	}
+
 	I915_WRITE(PLANE_KEYVAL(pipe, plane), key->min_value);
 	I915_WRITE(PLANE_KEYMAX(pipe, plane), key->max_value);
 	I915_WRITE(PLANE_KEYMSK(pipe, plane), key->channel_mask);
-- 
1.7.9.5