@@ -683,14 +683,14 @@ static irqreturn_t isp_isr(int irq, void *_isp)
*
* Return the total number of users of all video device nodes in the pipeline.
*/
-static int isp_pipeline_pm_use_count(struct media_entity *entity)
+static int isp_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;
}
@@ -742,27 +742,27 @@ static int isp_pipeline_pm_power_one(struct media_entity *entity, int change)
*
* Return 0 on success or a negative error code on failure.
*/
-static int isp_pipeline_pm_power(struct media_entity *entity, int change)
+static int isp_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 = isp_pipeline_pm_power_one(entity, change);
if (!ret)
- return 0;
+ return ret;
- 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))
isp_pipeline_pm_power_one(first, -change);
@@ -782,7 +782,8 @@ static int isp_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 omap3isp_pipeline_pm_use(struct media_entity *entity, int use)
+int omap3isp_pipeline_pm_use(struct media_entity *entity, int use,
+ struct media_entity_graph *graph)
{
int change = use ? 1 : -1;
int ret;
@@ -794,7 +795,7 @@ int omap3isp_pipeline_pm_use(struct media_entity *entity, int use)
WARN_ON(entity->use_count < 0);
/* Apply power change to connected non-nodes. */
- ret = isp_pipeline_pm_power(entity, change);
+ ret = isp_pipeline_pm_power(entity, change, graph);
if (ret < 0)
entity->use_count -= change;
@@ -820,35 +821,49 @@ int omap3isp_pipeline_pm_use(struct media_entity *entity, int use)
static int isp_pipeline_link_notify(struct media_link *link, u32 flags,
unsigned int notification)
{
+ struct media_entity_graph *graph =
+ &container_of(link->graph_obj.mdev, struct isp_device,
+ media_dev)->pm_count_graph;
struct media_entity *source = link->source->entity;
struct media_entity *sink = link->sink->entity;
- int source_use = isp_pipeline_pm_use_count(source);
- int sink_use = isp_pipeline_pm_use_count(sink);
- int ret;
+ int source_use;
+ int sink_use;
+ int ret = 0;
+
+ 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 = isp_pipeline_pm_use_count(source, graph);
+ sink_use = isp_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. */
- isp_pipeline_pm_power(source, -sink_use);
- isp_pipeline_pm_power(sink, -source_use);
+ isp_pipeline_pm_power(source, -sink_use, graph);
+ isp_pipeline_pm_power(sink, -source_use, graph);
return 0;
}
if (notification == MEDIA_DEV_NOTIFY_PRE_LINK_CH &&
(flags & MEDIA_LNK_FL_ENABLED)) {
- ret = isp_pipeline_pm_power(source, sink_use);
+ ret = isp_pipeline_pm_power(source, sink_use, graph);
if (ret < 0)
return ret;
- ret = isp_pipeline_pm_power(sink, source_use);
+ ret = isp_pipeline_pm_power(sink, source_use, graph);
if (ret < 0)
- isp_pipeline_pm_power(source, -sink_use);
-
- return ret;
+ isp_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;
}
/* -----------------------------------------------------------------------------
@@ -176,6 +176,7 @@ struct isp_device {
struct v4l2_device v4l2_dev;
struct v4l2_async_notifier notifier;
struct media_device media_dev;
+ struct media_entity_graph pm_count_graph;
struct device *dev;
u32 revision;
@@ -265,7 +266,8 @@ void omap3isp_subclk_enable(struct isp_device *isp,
void omap3isp_subclk_disable(struct isp_device *isp,
enum isp_subclk_resource res);
-int omap3isp_pipeline_pm_use(struct media_entity *entity, int use);
+int omap3isp_pipeline_pm_use(struct media_entity *entity, int use,
+ struct media_entity_graph *graph);
int omap3isp_register_entities(struct platform_device *pdev,
struct v4l2_device *v4l2_dev);
@@ -227,8 +227,15 @@ static int isp_video_get_graph_data(struct isp_video *video,
struct media_entity *entity = &video->video.entity;
struct media_device *mdev = entity->graph_obj.mdev;
struct isp_video *far_end = NULL;
+ int ret;
mutex_lock(&mdev->graph_mutex);
+ ret = media_entity_graph_walk_init(&graph, entity->graph_obj.mdev);
+ if (ret) {
+ mutex_unlock(&mdev->graph_mutex);
+ return ret;
+ }
+
media_entity_graph_walk_start(&graph, entity);
while ((entity = media_entity_graph_walk_next(&graph))) {
@@ -252,6 +259,8 @@ static int isp_video_get_graph_data(struct isp_video *video,
mutex_unlock(&mdev->graph_mutex);
+ media_entity_graph_walk_cleanup(&graph);
+
if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
pipe->input = far_end;
pipe->output = video;
@@ -1242,7 +1251,12 @@ static int isp_video_open(struct file *file)
goto done;
}
- ret = omap3isp_pipeline_pm_use(&video->video.entity, 1);
+ ret = media_entity_graph_walk_init(&handle->graph,
+ &video->isp->media_dev);
+ if (ret)
+ goto done;
+
+ ret = omap3isp_pipeline_pm_use(&video->video.entity, 1, &handle->graph);
if (ret < 0) {
omap3isp_put(video->isp);
goto done;
@@ -1273,6 +1287,7 @@ static int isp_video_open(struct file *file)
done:
if (ret < 0) {
v4l2_fh_del(&handle->vfh);
+ media_entity_graph_walk_cleanup(&handle->graph);
kfree(handle);
}
@@ -1292,7 +1307,7 @@ static int isp_video_release(struct file *file)
vb2_queue_release(&handle->queue);
mutex_unlock(&video->queue_lock);
- omap3isp_pipeline_pm_use(&video->video.entity, 0);
+ omap3isp_pipeline_pm_use(&video->video.entity, 0, &handle->graph);
/* Release the file handle. */
v4l2_fh_del(vfh);
@@ -189,6 +189,7 @@ struct isp_video_fh {
struct vb2_queue queue;
struct v4l2_format format;
struct v4l2_fract timeperframe;
+ struct media_entity_graph graph;
};
#define to_isp_video_fh(fh) container_of(fh, struct isp_video_fh, vfh)
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> --- drivers/media/platform/omap3isp/isp.c | 63 ++++++++++++++++++------------ drivers/media/platform/omap3isp/isp.h | 4 +- drivers/media/platform/omap3isp/ispvideo.c | 19 ++++++++- drivers/media/platform/omap3isp/ispvideo.h | 1 + 4 files changed, 60 insertions(+), 27 deletions(-)