[PATCH v2 03/15] drm: Add support for optional per-plane rotation property

[ville.syrjala at linux.intel.com]

From: Ville Syrjälä <ville.syrjala at linux.intel.com>

Not all planes on the ssytem may support the same rotations/reflections,
so make it possible to create a separate property for each plane.
This way userspace gets told exactly which rotations/reflections are
possible for each plane.

v2: Add drm_plane_create_rotation_property() helper

Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk> (v1)
---
 drivers/gpu/drm/drm_atomic.c    |  6 ++++--
 drivers/gpu/drm/drm_crtc.c      | 33 +++++++++++++++++++++++++++++++++
 drivers/gpu/drm/drm_fb_helper.c |  6 +++++-
 include/drm/drm_crtc.h          | 10 +++++++++-
 4 files changed, 51 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
index c425bd39a210..116f940a9267 100644
--- a/drivers/gpu/drm/drm_atomic.c
+++ b/drivers/gpu/drm/drm_atomic.c
@@ -709,7 +709,8 @@ int drm_atomic_plane_set_property(struct drm_plane *plane,
 		state->src_w = val;
 	} else if (property == config->prop_src_h) {
 		state->src_h = val;
-	} else if (property == config->rotation_property) {
+	} else if (property == config->rotation_property ||
+		   property == plane->rotation_property) {
 		if (!is_power_of_2(val & DRM_ROTATE_MASK))
 			return -EINVAL;
 		state->rotation = val;
@@ -767,7 +768,8 @@ drm_atomic_plane_get_property(struct drm_plane *plane,
 		*val = state->src_w;
 	} else if (property == config->prop_src_h) {
 		*val = state->src_h;
-	} else if (property == config->rotation_property) {
+	} else if (property == config->rotation_property ||
+		   property == plane->rotation_property) {
 		*val = state->rotation;
 	} else if (plane->funcs->atomic_get_property) {
 		return plane->funcs->atomic_get_property(plane, state, property, val);
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 986de180e6c2..9e20a52ece7c 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -5801,6 +5801,39 @@ struct drm_property *drm_mode_create_rotation_property(struct drm_device *dev,
 }
 EXPORT_SYMBOL(drm_mode_create_rotation_property);
 
+int drm_plane_create_rotation_property(struct drm_plane *plane,
+				       unsigned int rotation,
+				       unsigned int supported_rotations)
+{
+	static const struct drm_prop_enum_list props[] = {
+		{ DRM_ROTATE_0,   "rotate-0" },
+		{ DRM_ROTATE_90,  "rotate-90" },
+		{ DRM_ROTATE_180, "rotate-180" },
+		{ DRM_ROTATE_270, "rotate-270" },
+		{ DRM_REFLECT_X,  "reflect-x" },
+		{ DRM_REFLECT_Y,  "reflect-y" },
+	};
+	struct drm_property *prop;
+
+	WARN_ON((supported_rotations & rotation) == 0);
+
+	prop = drm_property_create_bitmask(plane->dev, 0, "rotation",
+					   props, ARRAY_SIZE(props),
+					   supported_rotations);
+	if (!prop)
+		return -ENOMEM;
+
+	drm_object_attach_property(&plane->base, prop, rotation);
+
+	if (plane->state)
+		plane->state->rotation = rotation;
+
+	plane->rotation_property = prop;
+
+	return 0;
+}
+EXPORT_SYMBOL(drm_plane_create_rotation_property);
+
 /**
  * DOC: Tile group
  *
diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
index ce54e985d91b..ce536c0553e5 100644
--- a/drivers/gpu/drm/drm_fb_helper.c
+++ b/drivers/gpu/drm/drm_fb_helper.c
@@ -392,7 +392,11 @@ static int restore_fbdev_mode(struct drm_fb_helper *fb_helper)
 		if (plane->type != DRM_PLANE_TYPE_PRIMARY)
 			drm_plane_force_disable(plane);
 
-		if (dev->mode_config.rotation_property) {
+		if (plane->rotation_property) {
+			drm_mode_plane_set_obj_prop(plane,
+						    plane->rotation_property,
+						    BIT(DRM_ROTATE_0));
+		} else if (dev->mode_config.rotation_property) {
 			drm_mode_plane_set_obj_prop(plane,
 						    dev->mode_config.rotation_property,
 						    BIT(DRM_ROTATE_0));
diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index b7ac7dcf52db..01cf0673f6c8 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -1737,6 +1737,11 @@ struct drm_plane {
 	const struct drm_plane_helper_funcs *helper_private;
 
 	struct drm_plane_state *state;
+
+	/**
+	 * @rotation_property: Optional property for planes to specify rotation.
+	 */
+	struct drm_property *rotation_property;
 };
 
 /**
@@ -2475,7 +2480,7 @@ struct drm_mode_config {
 	 */
 	struct drm_property *plane_type_property;
 	/**
-	 * @rotation_property: Optional property for planes or CRTCs to specifiy
+	 * @rotation_property: Optional property for planes or CRTCs to specify
 	 * rotation.
 	 */
 	struct drm_property *rotation_property;
@@ -2957,6 +2962,9 @@ extern int drm_mode_plane_set_obj_prop(struct drm_plane *plane,
 
 extern struct drm_property *drm_mode_create_rotation_property(struct drm_device *dev,
 							      unsigned int supported_rotations);
+extern int drm_plane_create_rotation_property(struct drm_plane *plane,
+					      unsigned int rotation,
+					      unsigned int supported_rotations);
 extern unsigned int drm_rotation_simplify(unsigned int rotation,
 					  unsigned int supported_rotations);
 extern void drm_crtc_enable_color_mgmt(struct drm_crtc *crtc,
-- 
2.7.4