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Commit f81338a5 authored by Chandra Konduru's avatar Chandra Konduru Committed by Daniel Vetter
Browse files

drm: Adding drm helper function drm_plane_from_index(). 



Adding drm helper function to return plane pointer from index where
index is a returned by drm_plane_index.

v2:
-avoided nested loop by adding loop count (Daniel)

v3:
-updated patch header prefix to 'drm' (Matt)

v4:
-fixed a kerneldoc issue (kbuild-internal)

Cc: dri-devel@lists.freedesktop.org
Signed-off-by: default avatarChandra Konduru <chandra.konduru@intel.com>
Reviewed-by: default avatarMatt Roper <matthew.d.roper@intel.com>
Acked-by: default avatarDave Airlie <airlied@redhat.com>
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent 595e1eeb

drivers/gpu/drm/drm_crtc.c

+23 −0
Original line number Diff line number Diff line
@@ -1285,6 +1285,29 @@ unsigned int drm_plane_index(struct drm_plane *plane) 
}

EXPORT_SYMBOL(drm_plane_index);



/**

 * drm_plane_from_index - find the registered plane at an index

 * @dev: DRM device

 * @idx: index of registered plane to find for

 *

 * Given a plane index, return the registered plane from DRM device's

 * list of planes with matching index.

 */

struct drm_plane *

drm_plane_from_index(struct drm_device *dev, int idx)

{

	struct drm_plane *plane;

	unsigned int i = 0;



	list_for_each_entry(plane, &dev->mode_config.plane_list, head) {

		if (i == idx)

			return plane;

		i++;

	}

	return NULL;

}

EXPORT_SYMBOL(drm_plane_from_index);



/**

 * drm_plane_force_disable - Forcibly disable a plane

 * @plane: plane to disable

include/drm/drm_crtc.h

+1 −0
Original line number Diff line number Diff line
@@ -1264,6 +1264,7 @@ extern int drm_plane_init(struct drm_device *dev, 
			  bool is_primary);

extern void drm_plane_cleanup(struct drm_plane *plane);

extern unsigned int drm_plane_index(struct drm_plane *plane);

extern struct drm_plane * drm_plane_from_index(struct drm_device *dev, int idx);

extern void drm_plane_force_disable(struct drm_plane *plane);

extern int drm_plane_check_pixel_format(const struct drm_plane *plane,

					u32 format);