drm/doc: Polish docs for drm_mode_object

I figured an overview section here is overkill, and better
to just document the 2 structures themselves well enough.

v2: Review from Archit:
- Appease checkpatch in moved code.
- Spelling fixes in the kerneldoc.

Reviewed-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20160829082757.17913-5-daniel.vetter@ffwll.ch

1 files changed, 13 insertions, 4 deletions

diff --git a/drivers/gpu/drm/drm_mode_object.c b/drivers/gpu/drm/drm_mode_object.c
index a92aeed51156..6edda8382a4c 100644
--- a/drivers/gpu/drm/drm_mode_object.c
+++ b/drivers/gpu/drm/drm_mode_object.c
@@ -97,7 +97,7 @@ void drm_mode_object_register(struct drm_device *dev,
  * for reference counted modeset objects like framebuffers.
  */
 void drm_mode_object_unregister(struct drm_device *dev,
-			 struct drm_mode_object *object)
+				struct drm_mode_object *object)
 {
 	mutex_lock(&dev->mode_config.idr_mutex);
 	if (object->id) {
@@ -152,7 +152,7 @@ EXPORT_SYMBOL(drm_mode_object_find);
  * drm_mode_object_unreference - decr the object refcnt
  * @obj: mode_object
  *
- * This functions decrements the object's refcount if it is a refcounted modeset
+ * This function decrements the object's refcount if it is a refcounted modeset
  * object. It is a no-op on any other object. This is used to drop references
  * acquired with drm_mode_object_reference().
  */
@@ -169,7 +169,7 @@ EXPORT_SYMBOL(drm_mode_object_unreference);
  * drm_mode_object_reference - incr the object refcnt
  * @obj: mode_object
  *
- * This functions increments the object's refcount if it is a refcounted modeset
+ * This function increments the object's refcount if it is a refcounted modeset
  * object. It is a no-op on any other object. References should be dropped again
  * by calling drm_mode_object_unreference().
  */
@@ -218,10 +218,16 @@ EXPORT_SYMBOL(drm_object_attach_property);
  * @property: property to set
  * @val: value the property should be set to
  *
- * This functions sets a given property on a given object. This function only
+ * This function sets a given property on a given object. This function only
  * changes the software state of the property, it does not call into the
  * driver's ->set_property callback.
  *
+ * Note that atomic drivers should not have any need to call this, the core will
+ * ensure consistency of values reported back to userspace through the
+ * appropriate ->atomic_get_property callback. Only legacy drivers should call
+ * this function to update the tracked value (after clamping and other
+ * restrictions have been applied).
+ *
  * Returns:
  * Zero on success, error code on failure.
  */
@@ -252,6 +258,9 @@ EXPORT_SYMBOL(drm_object_property_set_value);
  * value this might be out of sync with the hardware, depending upon the driver
  * and property.
  *
+ * Atomic drivers should never call this function directly, the core will read
+ * out property values through the various ->atomic_get_property callbacks.
+ *
  * Returns:
  * Zero on success, error code on failure.
  */