drm: add object property type
An object property is an id (idr) for a drm mode object. This
will allow a property to be used set/get a framebuffer, CRTC, etc.
Signed-off-by: Rob Clark <robdclark@gmail.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 73f543a..f990d9f 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -370,6 +370,21 @@
mutex_unlock(&dev->mode_config.idr_mutex);
}
+static struct drm_mode_object *_object_find(struct drm_device *dev,
+ uint32_t id, uint32_t type)
+{
+ struct drm_mode_object *obj = NULL;
+
+ mutex_lock(&dev->mode_config.idr_mutex);
+ obj = idr_find(&dev->mode_config.crtc_idr, id);
+ if (!obj || (type != DRM_MODE_OBJECT_ANY && obj->type != type) ||
+ (obj->id != id))
+ obj = NULL;
+ mutex_unlock(&dev->mode_config.idr_mutex);
+
+ return obj;
+}
+
/**
* drm_mode_object_find - look up a drm object with static lifetime
* @dev: drm device
@@ -377,7 +392,9 @@
* @type: type of the mode object
*
* Note that framebuffers cannot be looked up with this functions - since those
- * are reference counted, they need special treatment.
+ * are reference counted, they need special treatment. Even with
+ * DRM_MODE_OBJECT_ANY (although that will simply return NULL
+ * rather than WARN_ON()).
*/
struct drm_mode_object *drm_mode_object_find(struct drm_device *dev,
uint32_t id, uint32_t type)
@@ -387,13 +404,10 @@
/* Framebuffers are reference counted and need their own lookup
* function.*/
WARN_ON(type == DRM_MODE_OBJECT_FB);
-
- mutex_lock(&dev->mode_config.idr_mutex);
- obj = idr_find(&dev->mode_config.crtc_idr, id);
- if (!obj || (obj->type != type) || (obj->id != id))
+ obj = _object_find(dev, id, type);
+ /* don't leak out unref'd fb's */
+ if (obj && (obj->type == DRM_MODE_OBJECT_FB))
obj = NULL;
- mutex_unlock(&dev->mode_config.idr_mutex);
-
return obj;
}
EXPORT_SYMBOL(drm_mode_object_find);
@@ -3074,6 +3088,8 @@
if (!property)
return NULL;
+ property->dev = dev;
+
if (num_values) {
property->values = kzalloc(sizeof(uint64_t)*num_values, GFP_KERNEL);
if (!property->values)
@@ -3234,6 +3250,23 @@
}
EXPORT_SYMBOL(drm_property_create_range);
+struct drm_property *drm_property_create_object(struct drm_device *dev,
+ int flags, const char *name, uint32_t type)
+{
+ struct drm_property *property;
+
+ flags |= DRM_MODE_PROP_OBJECT;
+
+ property = drm_property_create(dev, flags, name, 1);
+ if (!property)
+ return NULL;
+
+ property->values[0] = type;
+
+ return property;
+}
+EXPORT_SYMBOL(drm_property_create_object);
+
/**
* drm_property_add_enum - add a possible value to an enumeration property
* @property: enumeration property to change
@@ -3661,6 +3694,20 @@
} else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) {
/* Only the driver knows */
return true;
+ } else if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) {
+ struct drm_mode_object *obj;
+ /* a zero value for an object property translates to null: */
+ if (value == 0)
+ return true;
+ /*
+ * NOTE: use _object_find() directly to bypass restriction on
+ * looking up refcnt'd objects (ie. fb's). For a refcnt'd
+ * object this could race against object finalization, so it
+ * simply tells us that the object *was* valid. Which is good
+ * enough.
+ */
+ obj = _object_find(property->dev, value, property->values[0]);
+ return obj != NULL;
} else {
int i;
for (i = 0; i < property->num_values; i++)