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-rw-r--r--include/drm/drm_plane.h88
1 files changed, 64 insertions, 24 deletions
diff --git a/include/drm/drm_plane.h b/include/drm/drm_plane.h
index 1a647f8f5661..8a152dc16ea5 100644
--- a/include/drm/drm_plane.h
+++ b/include/drm/drm_plane.h
@@ -525,30 +525,27 @@ enum drm_plane_type {
/**
* struct drm_plane - central DRM plane control structure
- * @dev: DRM device this plane belongs to
- * @head: for list management
- * @name: human readable name, can be overwritten by the driver
- * @base: base mode object
- * @possible_crtcs: pipes this plane can be bound to
- * @format_types: array of formats supported by this plane
- * @format_count: number of formats supported
- * @format_default: driver hasn't supplied supported formats for the plane
- * @modifiers: array of modifiers supported by this plane
- * @modifier_count: number of modifiers supported
- * @old_fb: Temporary tracking of the old fb while a modeset is ongoing. Used by
- * drm_mode_set_config_internal() to implement correct refcounting.
- * @funcs: helper functions
- * @properties: property tracking for this plane
- * @type: type of plane (overlay, primary, cursor)
- * @alpha_property: alpha property for this plane
- * @zpos_property: zpos property for this plane
- * @rotation_property: rotation property for this plane
- * @helper_private: mid-layer private data
+ *
+ * Planes represent the scanout hardware of a display block. They receive their
+ * input data from a &drm_framebuffer and feed it to a &drm_crtc. Planes control
+ * the color conversion, see `Plane Composition Properties`_ for more details,
+ * and are also involved in the color conversion of input pixels, see `Color
+ * Management Properties`_ for details on that.
*/
struct drm_plane {
+ /** @dev: DRM device this plane belongs to */
struct drm_device *dev;
+
+ /**
+ * @head:
+ *
+ * List of all planes on @dev, linked from &drm_mode_config.plane_list.
+ * Invariant over the lifetime of @dev and therefore does not need
+ * locking.
+ */
struct list_head head;
+ /** @name: human readable name, can be overwritten by the driver */
char *name;
/**
@@ -562,35 +559,62 @@ struct drm_plane {
*/
struct drm_modeset_lock mutex;
+ /** @base: base mode object */
struct drm_mode_object base;
+ /**
+ * @possible_crtcs: pipes this plane can be bound to constructed from
+ * drm_crtc_mask()
+ */
uint32_t possible_crtcs;
+ /** @format_types: array of formats supported by this plane */
uint32_t *format_types;
+ /** @format_count: Size of the array pointed at by @format_types. */
unsigned int format_count;
+ /**
+ * @format_default: driver hasn't supplied supported formats for the
+ * plane. Used by the drm_plane_init compatibility wrapper only.
+ */
bool format_default;
+ /** @modifiers: array of modifiers supported by this plane */
uint64_t *modifiers;
+ /** @modifier_count: Size of the array pointed at by @modifier_count. */
unsigned int modifier_count;
/**
- * @crtc: Currently bound CRTC, only really meaningful for non-atomic
- * drivers. Atomic drivers should instead check &drm_plane_state.crtc.
+ * @crtc:
+ *
+ * Currently bound CRTC, only meaningful for non-atomic drivers. For
+ * atomic drivers this is forced to be NULL, atomic drivers should
+ * instead check &drm_plane_state.crtc.
*/
struct drm_crtc *crtc;
/**
- * @fb: Currently bound framebuffer, only really meaningful for
- * non-atomic drivers. Atomic drivers should instead check
- * &drm_plane_state.fb.
+ * @fb:
+ *
+ * Currently bound framebuffer, only meaningful for non-atomic drivers.
+ * For atomic drivers this is forced to be NULL, atomic drivers should
+ * instead check &drm_plane_state.fb.
*/
struct drm_framebuffer *fb;
+ /**
+ * @old_fb:
+ *
+ * Temporary tracking of the old fb while a modeset is ongoing. Only
+ * used by non-atomic drivers, forced to be NULL for atomic drivers.
+ */
struct drm_framebuffer *old_fb;
+ /** @funcs: plane control functions */
const struct drm_plane_funcs *funcs;
+ /** @properties: property tracking for this plane */
struct drm_object_properties properties;
+ /** @type: Type of plane, see &enum drm_plane_type for details. */
enum drm_plane_type type;
/**
@@ -599,6 +623,7 @@ struct drm_plane {
*/
unsigned index;
+ /** @helper_private: mid-layer private data */
const struct drm_plane_helper_funcs *helper_private;
/**
@@ -616,8 +641,23 @@ struct drm_plane {
*/
struct drm_plane_state *state;
+ /**
+ * @alpha_property:
+ * Optional alpha property for this plane. See
+ * drm_plane_create_alpha_property().
+ */
struct drm_property *alpha_property;
+ /**
+ * @zpos_property:
+ * Optional zpos property for this plane. See
+ * drm_plane_create_zpos_property().
+ */
struct drm_property *zpos_property;
+ /**
+ * @rotation_property:
+ * Optional rotation property for this plane. See
+ * drm_plane_create_rotation_property().
+ */
struct drm_property *rotation_property;
/**