drm: Trivial comment grammar cleanups

Most of these are just cases where code comments used contractions
(it's, who's) where they actually mean to use a possessive pronoun (its,
whose) or vice-versa.

Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20190202012326.20096-1-matthew.d.roper@intel.com

include/drm/drm_atomic.h

@@ -192,7 +192,7 @@ struct drm_private_state;
  * private objects. The structure itself is used as a vtable to identify the
  * associated private object type. Each private object type that needs to be
  * added to the atomic states is expected to have an implementation of these
- * hooks and pass a pointer to it's drm_private_state_funcs struct to
+ * hooks and pass a pointer to its drm_private_state_funcs struct to
  * drm_atomic_get_private_obj_state().
  */
 struct drm_private_state_funcs {

include/drm/drm_client.h

@@ -26,7 +26,7 @@ struct drm_client_funcs {
 	 * @unregister:
 	 *
 	 * Called when &drm_device is unregistered. The client should respond by
-	 * releasing it's resources using drm_client_release().
+	 * releasing its resources using drm_client_release().
 	 *
 	 * This callback is optional.
 	 */

include/drm/drm_connector.h

@@ -912,7 +912,7 @@ struct drm_connector {
 	/**
 	 * @ycbcr_420_allowed : This bool indicates if this connector is
 	 * capable of handling YCBCR 420 output. While parsing the EDID
-	 * blocks, its very helpful to know, if the source is capable of
+	 * blocks it's very helpful to know if the source is capable of
 	 * handling YCBCR 420 outputs.
 	 */
 	bool ycbcr_420_allowed;

include/drm/drm_mode_config.h

@@ -361,7 +361,7 @@ struct drm_mode_config {
 	 *
 	 * This is the big scary modeset BKL which protects everything that
 	 * isn't protect otherwise. Scope is unclear and fuzzy, try to remove
-	 * anything from under it's protection and move it into more well-scoped
+	 * anything from under its protection and move it into more well-scoped
 	 * locks.
 	 *
 	 * The one important thing this protects is the use of @acquire_ctx.

include/drm/drm_modeset_helper_vtables.h

@@ -1013,7 +1013,7 @@ struct drm_plane_helper_funcs {
 	 * @prepare_fb:
 	 *
 	 * This hook is to prepare a framebuffer for scanout by e.g. pinning
-	 * it's backing storage or relocating it into a contiguous block of
+	 * its backing storage or relocating it into a contiguous block of
 	 * VRAM. Other possible preparatory work includes flushing caches.
 	 *
 	 * This function must not block for outstanding rendering, since it is

include/drm/drm_modeset_lock.h

@@ -68,7 +68,7 @@ struct drm_modeset_acquire_ctx {
 /**
  * struct drm_modeset_lock - used for locking modeset resources.
  * @mutex: resource locking
- * @head: used to hold it's place on &drm_atomi_state.locked list when
+ * @head: used to hold its place on &drm_atomi_state.locked list when
  *    part of an atomic update
  *
  * Used for locking CRTCs and other modeset resources.

include/drm/ttm/ttm_bo_driver.h

@@ -867,7 +867,7 @@ int ttm_bo_pipeline_move(struct ttm_buffer_object *bo,
  *
  * @bo: A pointer to a struct ttm_buffer_object.
  *
- * Pipelined gutting a BO of it's backing store.
+ * Pipelined gutting a BO of its backing store.
  */
 int ttm_bo_pipeline_gutting(struct ttm_buffer_object *bo);