+#define SKL_MIN_SRC_W 8
+#define SKL_MAX_SRC_W 4096
+#define SKL_MIN_SRC_H 8
+#define SKL_MAX_SRC_H 4096
+#define SKL_MIN_DST_W 8
+#define SKL_MAX_DST_W 4096
+#define SKL_MIN_DST_H 8
+#define SKL_MAX_DST_H 4096
+
+struct intel_scaler {
+ int in_use;
+ uint32_t mode;
+};
+
+struct intel_crtc_scaler_state {
+#define SKL_NUM_SCALERS 2
+ struct intel_scaler scalers[SKL_NUM_SCALERS];
+
+ /*
+ * scaler_users: keeps track of users requesting scalers on this crtc.
+ *
+ * If a bit is set, a user is using a scaler.
+ * Here user can be a plane or crtc as defined below:
+ * bits 0-30 - plane (bit position is index from drm_plane_index)
+ * bit 31 - crtc
+ *
+ * Instead of creating a new index to cover planes and crtc, using
+ * existing drm_plane_index for planes which is well less than 31
+ * planes and bit 31 for crtc. This should be fine to cover all
+ * our platforms.
+ *
+ * intel_atomic_setup_scalers will setup available scalers to users
+ * requesting scalers. It will gracefully fail if request exceeds
+ * avilability.
+ */
+#define SKL_CRTC_INDEX 31
+ unsigned scaler_users;
+
+ /* scaler used by crtc for panel fitting purpose */
+ int scaler_id;
+};
+
+/* drm_mode->private_flags */
+#define I915_MODE_FLAG_INHERITED 1
+