diff options
| -rw-r--r-- | drivers/gpu/drm/drm_crtc.c | 23 | ||||
| -rw-r--r-- | include/drm/drm_crtc.h | 1 |
2 files changed, 24 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c index 9f970c2d4819..6254942141d3 100644 --- a/drivers/gpu/drm/drm_crtc.c +++ b/drivers/gpu/drm/drm_crtc.c @@ -1286,6 +1286,29 @@ 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 * diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h index adc9ea5acf02..ed769e79c675 100644 --- a/include/drm/drm_crtc.h +++ b/include/drm/drm_crtc.h @@ -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); |