drm: Add DRM_MODE_ROTATE_ and DRM_MODE_REFLECT_ to UAPI

Add DRM_MODE_ROTATE_ and DRM_MODE_REFLECT_ defines to the UAPI
as a convenience.

Ideally the DRM_ROTATE_ and DRM_REFLECT_ property ids are looked up
through the atomic API, but realizing that userspace is likely to take
shortcuts and assume that the enum values are what is sent over the
wire.

As a result these defines are provided purely as a convenience to
userspace applications.

Changes since v3:
 - Switched away from past tense in comments
 - Add define name change to previously mis-spelled DRM_REFLECT_X comment
 - Improved the comment for the DRM_MODE_REFLECT_<axis> comment

Changes since v2:
 - Changed define prefix from DRM_MODE_PROP_ to DRM_MODE_
 - Fix compilation errors
 - Changed comment formatting
 - Deduplicated comment lines
 - Clarified DRM_MODE_PROP_REFLECT_ comment

Changes since v1:
 - Moved defines from drm.h to drm_mode.h
 - Changed define prefix from DRM_ to DRM_MODE_PROP_
 - Updated uses of the defines to the new prefix
 - Removed include from drm_rect.c
 - Stopped using the BIT() macro

Signed-off-by: Robert Foss <robert.foss@collabora.com>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
Reviewed-by: Sinclair Yeh <syeh@vmware.com>
Acked-by: Liviu Dudau <Liviu.Dudau@arm.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20170519205017.23307-2-robert.foss@collabora.com

2 files changed, 50 insertions, 20 deletions

diff --git a/include/drm/drm_blend.h b/include/drm/drm_blend.h
index bc9e596be4c2..17606026590b 100644
--- a/include/drm/drm_blend.h
+++ b/include/drm/drm_blend.h
@@ -25,32 +25,15 @@
 
 #include <linux/list.h>
 #include <linux/ctype.h>
+#include <drm/drm_mode.h>
 
 struct drm_device;
 struct drm_atomic_state;
 struct drm_plane;
 
-/*
- * Rotation property bits. DRM_ROTATE_<degrees> rotates the image by the
- * specified amount in degrees in counter clockwise direction. DRM_REFLECT_X and
- * DRM_REFLECT_Y reflects the image along the specified axis prior to rotation
- *
- * WARNING: These defines are UABI since they're exposed in the rotation
- * property.
- */
-#define DRM_ROTATE_0	BIT(0)
-#define DRM_ROTATE_90	BIT(1)
-#define DRM_ROTATE_180	BIT(2)
-#define DRM_ROTATE_270	BIT(3)
-#define DRM_ROTATE_MASK (DRM_ROTATE_0   | DRM_ROTATE_90 | \
-			 DRM_ROTATE_180 | DRM_ROTATE_270)
-#define DRM_REFLECT_X	BIT(4)
-#define DRM_REFLECT_Y	BIT(5)
-#define DRM_REFLECT_MASK (DRM_REFLECT_X | DRM_REFLECT_Y)
-
 static inline bool drm_rotation_90_or_270(unsigned int rotation)
 {
-	return rotation & (DRM_ROTATE_90 | DRM_ROTATE_270);
+	return rotation & (DRM_MODE_ROTATE_90 | DRM_MODE_ROTATE_270);
 }
 
 int drm_plane_create_rotation_property(struct drm_plane *plane,
diff --git a/include/uapi/drm/drm_mode.h b/include/uapi/drm/drm_mode.h
index 8c67fc03d53d..403339f98a92 100644
--- a/include/uapi/drm/drm_mode.h
+++ b/include/uapi/drm/drm_mode.h
@@ -75,7 +75,7 @@ extern "C" {
   * (define not exposed to user space).
   */
 #define DRM_MODE_FLAG_3D_MASK			(0x1f<<14)
-#define  DRM_MODE_FLAG_3D_NONE			(0<<14)
+#define  DRM_MODE_FLAG_3D_NONE		(0<<14)
 #define  DRM_MODE_FLAG_3D_FRAME_PACKING		(1<<14)
 #define  DRM_MODE_FLAG_3D_FIELD_ALTERNATIVE	(2<<14)
 #define  DRM_MODE_FLAG_3D_LINE_ALTERNATIVE	(3<<14)
@@ -127,6 +127,53 @@ extern "C" {
 #define DRM_MODE_LINK_STATUS_GOOD	0
 #define DRM_MODE_LINK_STATUS_BAD	1
 
+/*
+ * DRM_MODE_ROTATE_<degrees>
+ *
+ * Signals that a drm plane is been rotated <degrees> degrees in counter
+ * clockwise direction.
+ *
+ * This define is provided as a convenience, looking up the property id
+ * using the name->prop id lookup is the preferred method.
+ */
+#define DRM_MODE_ROTATE_0       (1<<0)
+#define DRM_MODE_ROTATE_90      (1<<1)
+#define DRM_MODE_ROTATE_180     (1<<2)
+#define DRM_MODE_ROTATE_270     (1<<3)
+
+/*
+ * DRM_MODE_ROTATE_MASK
+ *
+ * Bitmask used to look for drm plane rotations.
+ */
+#define DRM_MODE_ROTATE_MASK (\
+		DRM_MODE_ROTATE_0  | \
+		DRM_MODE_ROTATE_90  | \
+		DRM_MODE_ROTATE_180 | \
+		DRM_MODE_ROTATE_270)
+
+/*
+ * DRM_MODE_REFLECT_<axis>
+ *
+ * Signals that the contents of a drm plane is reflected in the <axis> axis,
+ * in the same way as mirroring.
+ *
+ * This define is provided as a convenience, looking up the property id
+ * using the name->prop id lookup is the preferred method.
+ */
+#define DRM_MODE_REFLECT_X      (1<<4)
+#define DRM_MODE_REFLECT_Y      (1<<5)
+
+/*
+ * DRM_MODE_REFLECT_MASK
+ *
+ * Bitmask used to look for drm plane reflections.
+ */
+#define DRM_MODE_REFLECT_MASK (\
+		DRM_MODE_REFLECT_X | \
+		DRM_MODE_REFLECT_Y)
+
+
 struct drm_mode_modeinfo {
 	__u32 clock;
 	__u16 hdisplay;