/*
* iss_pipeline_pm_power - Apply power change to all entities in a pipeline
* @entity: The entity
* @change: Use count change
*
* Walk the pipeline to update the use count and the power state of all non-node
* entities.
*
* Return 0 on success or a negative error code on failure.
*/
static int iss_pipeline_pm_power(struct media_entity *entity, int change,
struct media_entity_graph *graph)
{
struct media_entity *first = entity;
int ret = 0;
if (!change)
return 0;
media_entity_graph_walk_start(graph, entity);
while (!ret && (entity = media_entity_graph_walk_next(graph)))
if (is_media_entity_v4l2_subdev(entity))
ret = iss_pipeline_pm_power_one(entity, change);
if (!ret)
return 0;
media_entity_graph_walk_start(graph, first);
while ((first = media_entity_graph_walk_next(graph)) &&
first != entity)
if (is_media_entity_v4l2_subdev(first))
iss_pipeline_pm_power_one(first, -change);
return ret;
}
/*
* iss_pipeline_pm_power - Apply power change to all entities in a pipeline
* @entity: The entity
* @change: Use count change
*
* Walk the pipeline to update the use count and the power state of all non-node
* entities.
*
* Return 0 on success or a negative error code on failure.
*/
static int iss_pipeline_pm_power(struct media_entity *entity, int change)
{
struct media_entity_graph graph;
struct media_entity *first = entity;
int ret = 0;
if (!change)
return 0;
media_entity_graph_walk_start(&graph, entity);
while (!ret && (entity = media_entity_graph_walk_next(&graph)))
if (media_entity_type(entity) != MEDIA_ENT_T_DEVNODE)
ret = iss_pipeline_pm_power_one(entity, change);
if (!ret)
return 0;
media_entity_graph_walk_start(&graph, first);
while ((first = media_entity_graph_walk_next(&graph))
&& first != entity)
if (media_entity_type(first) != MEDIA_ENT_T_DEVNODE)
iss_pipeline_pm_power_one(first, -change);
return ret;
}