@@ -389,14 +389,14 @@ static irqreturn_t iss_isr(int irq, void *_iss)
*
* Return the total number of users of all video device nodes in the pipeline.
*/
-static int iss_pipeline_pm_use_count(struct media_entity *entity)
+static int iss_pipeline_pm_use_count(struct media_entity *entity,
+ struct media_entity_graph *graph)
{
- struct media_entity_graph graph;
int use = 0;
- media_entity_graph_walk_start(&graph, entity);
+ media_entity_graph_walk_start(graph, entity);
- while ((entity = media_entity_graph_walk_next(&graph))) {
+ while ((entity = media_entity_graph_walk_next(graph))) {
if (is_media_entity_v4l2_io(entity))
use += entity->use_count;
}
@@ -449,27 +449,27 @@ static int iss_pipeline_pm_power_one(struct media_entity *entity, int change)
*
* Return 0 on success or a negative error code on failure.
*/
-static int iss_pipeline_pm_power(struct media_entity *entity, int change)
+static int iss_pipeline_pm_power(struct media_entity *entity, int change,
+ struct media_entity_graph *graph)
{
- struct media_entity_graph graph;
struct media_entity *first = entity;
int ret = 0;
if (!change)
return 0;
- media_entity_graph_walk_start(&graph, entity);
+ media_entity_graph_walk_start(graph, entity);
- while (!ret && (entity = media_entity_graph_walk_next(&graph)))
+ 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);
+ media_entity_graph_walk_start(graph, first);
- while ((first = media_entity_graph_walk_next(&graph))
+ while ((first = media_entity_graph_walk_next(graph))
&& first != entity)
if (is_media_entity_v4l2_subdev(first))
iss_pipeline_pm_power_one(first, -change);
@@ -489,7 +489,8 @@ static int iss_pipeline_pm_power(struct media_entity *entity, int change)
* off is assumed to never fail. No failure can occur when the use parameter is
* set to 0.
*/
-int omap4iss_pipeline_pm_use(struct media_entity *entity, int use)
+int omap4iss_pipeline_pm_use(struct media_entity *entity, int use,
+ struct media_entity_graph *graph)
{
int change = use ? 1 : -1;
int ret;
@@ -501,7 +502,7 @@ int omap4iss_pipeline_pm_use(struct media_entity *entity, int use)
WARN_ON(entity->use_count < 0);
/* Apply power change to connected non-nodes. */
- ret = iss_pipeline_pm_power(entity, change);
+ ret = iss_pipeline_pm_power(entity, change, graph);
if (ret < 0)
entity->use_count -= change;
@@ -526,34 +527,48 @@ int omap4iss_pipeline_pm_use(struct media_entity *entity, int use)
static int iss_pipeline_link_notify(struct media_link *link, u32 flags,
unsigned int notification)
{
+ struct media_entity_graph *graph =
+ &container_of(link->graph_obj.mdev, struct iss_device,
+ media_dev)->pm_count_graph;
struct media_entity *source = link->source->entity;
struct media_entity *sink = link->sink->entity;
- int source_use = iss_pipeline_pm_use_count(source);
- int sink_use = iss_pipeline_pm_use_count(sink);
+ int source_use;
+ int sink_use;
int ret;
+ if (notification == MEDIA_DEV_NOTIFY_PRE_LINK_CH) {
+ ret = media_entity_graph_walk_init(graph,
+ link->graph_obj.mdev);
+ if (ret)
+ return ret;
+ }
+
+ source_use = iss_pipeline_pm_use_count(source, graph);
+ sink_use = iss_pipeline_pm_use_count(sink, graph);
+
if (notification == MEDIA_DEV_NOTIFY_POST_LINK_CH &&
!(flags & MEDIA_LNK_FL_ENABLED)) {
/* Powering off entities is assumed to never fail. */
- iss_pipeline_pm_power(source, -sink_use);
- iss_pipeline_pm_power(sink, -source_use);
+ iss_pipeline_pm_power(source, -sink_use, graph);
+ iss_pipeline_pm_power(sink, -source_use, graph);
return 0;
}
if (notification == MEDIA_DEV_NOTIFY_PRE_LINK_CH &&
(flags & MEDIA_LNK_FL_ENABLED)) {
- ret = iss_pipeline_pm_power(source, sink_use);
+ ret = iss_pipeline_pm_power(source, sink_use, graph);
if (ret < 0)
return ret;
- ret = iss_pipeline_pm_power(sink, source_use);
+ ret = iss_pipeline_pm_power(sink, source_use, graph);
if (ret < 0)
- iss_pipeline_pm_power(source, -sink_use);
-
- return ret;
+ iss_pipeline_pm_power(source, -sink_use, graph);
}
- return 0;
+ if (notification == MEDIA_DEV_NOTIFY_POST_LINK_CH)
+ media_entity_graph_walk_cleanup(graph);
+
+ return ret;
}
/* -----------------------------------------------------------------------------
@@ -87,6 +87,7 @@ struct iss_reg {
struct iss_device {
struct v4l2_device v4l2_dev;
struct media_device media_dev;
+ struct media_entity_graph pm_count_graph;
struct device *dev;
u32 revision;
@@ -151,7 +152,8 @@ void omap4iss_isp_subclk_enable(struct iss_device *iss,
void omap4iss_isp_subclk_disable(struct iss_device *iss,
enum iss_isp_subclk_resource res);
-int omap4iss_pipeline_pm_use(struct media_entity *entity, int use);
+int omap4iss_pipeline_pm_use(struct media_entity *entity, int use,
+ struct media_entity_graph *graph);
int omap4iss_register_entities(struct platform_device *pdev,
struct v4l2_device *v4l2_dev);
@@ -210,6 +210,12 @@ iss_video_far_end(struct iss_video *video)
struct iss_video *far_end = NULL;
mutex_lock(&mdev->graph_mutex);
+
+ if (media_entity_graph_walk_init(&graph, mdev)) {
+ mutex_unlock(&mdev->graph_mutex);
+ return NULL;
+ }
+
media_entity_graph_walk_start(&graph, entity);
while ((entity = media_entity_graph_walk_next(&graph))) {
@@ -227,6 +233,9 @@ iss_video_far_end(struct iss_video *video)
}
mutex_unlock(&mdev->graph_mutex);
+
+ media_entity_graph_walk_cleanup(&graph);
+
return far_end;
}
@@ -774,7 +783,11 @@ iss_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
ret = media_entity_enum_init(&pipe->ent_enum, entity->graph_obj.mdev);
if (ret)
- goto err_enum_init;
+ goto err_graph_walk_init;
+
+ ret = media_entity_graph_walk_init(&graph, entity->graph_obj.mdev);
+ if (ret)
+ goto err_graph_walk_init;
if (video->iss->pdata->set_constraints)
video->iss->pdata->set_constraints(video->iss, true);
@@ -855,6 +868,8 @@ iss_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
spin_unlock_irqrestore(&video->qlock, flags);
}
+ media_entity_graph_walk_cleanup(&graph);
+
mutex_unlock(&video->stream_lock);
return 0;
@@ -868,9 +883,11 @@ err_media_entity_pipeline_start:
video->iss->pdata->set_constraints(video->iss, false);
video->queue = NULL;
+ media_entity_graph_walk_cleanup(&graph);
+
+err_graph_walk_init:
media_entity_enum_cleanup(&pipe->ent_enum);
-err_enum_init:
mutex_unlock(&video->stream_lock);
return ret;
@@ -994,7 +1011,13 @@ static int iss_video_open(struct file *file)
goto done;
}
- ret = omap4iss_pipeline_pm_use(&video->video.entity, 1);
+ ret = media_entity_graph_walk_init(&handle->graph,
+ &video->iss->media_dev);
+ if (ret)
+ goto done;
+
+ ret = omap4iss_pipeline_pm_use(&video->video.entity, 1,
+ &handle->graph);
if (ret < 0) {
omap4iss_put(video->iss);
goto done;
@@ -1033,6 +1056,7 @@ static int iss_video_open(struct file *file)
done:
if (ret < 0) {
v4l2_fh_del(&handle->vfh);
+ media_entity_graph_walk_cleanup(&handle->graph);
kfree(handle);
}
@@ -1048,12 +1072,13 @@ static int iss_video_release(struct file *file)
/* Disable streaming and free the buffers queue resources. */
iss_video_streamoff(file, vfh, video->type);
- omap4iss_pipeline_pm_use(&video->video.entity, 0);
+ omap4iss_pipeline_pm_use(&video->video.entity, 0, &handle->graph);
/* Release the videobuf2 queue */
vb2_queue_release(&handle->queue);
/* Release the file handle. */
+ media_entity_graph_walk_cleanup(&handle->graph);
v4l2_fh_del(vfh);
kfree(handle);
file->private_data = NULL;
@@ -183,6 +183,7 @@ struct iss_video_fh {
struct vb2_queue queue;
struct v4l2_format format;
struct v4l2_fract timeperframe;
+ struct media_entity_graph graph;
};
#define to_iss_video_fh(fh) container_of(fh, struct iss_video_fh, vfh)
The media graph walk requires initialisation and cleanup soon. Update the users to perform the soon necessary API calls. Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> --- drivers/staging/media/omap4iss/iss.c | 59 +++++++++++++++++++----------- drivers/staging/media/omap4iss/iss.h | 4 +- drivers/staging/media/omap4iss/iss_video.c | 33 +++++++++++++++-- drivers/staging/media/omap4iss/iss_video.h | 1 + 4 files changed, 70 insertions(+), 27 deletions(-)