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Subject[PATCH v2 3/3] media: vimc: use v4l2_pipeline_stream_{enable,disable} helpers
Date
Use v4l2_pipeline_stream_{enable,disable} to call .s_stream() subdevice
callbacks through the pipeline.

Tested streaming works with:

media-ctl -d /dev/media0 -V '"Sensor A":0[fmt:SBGGR8_1X8/640x480]'
media-ctl -d /dev/media0 -V '"Debayer A":0[fmt:SBGGR8_1X8/640x480]'
media-ctl -d /dev/media0 -V '"Sensor B":0[fmt:SBGGR8_1X8/640x480]'
media-ctl -d /dev/media0 -V '"Debayer B":0[fmt:SBGGR8_1X8/640x480]'
media-ctl -d /dev/media0 -V '"Scaler":0[fmt:RGB888_1X24/640x480]'
media-ctl -d /dev/media0 -V '"Scaler":0[crop:(100,50)/400x150]'
media-ctl -d /dev/media0 -V '"Scaler":1[fmt:RGB888_1X24/1920x1440]'
v4l2-ctl -d /dev/video2 -v width=1200,height=450
v4l2-ctl -d /dev/video0 -v pixelformat=BA81
v4l2-ctl -d /dev/video1 -v pixelformat=BA81
v4l2-ctl --stream-mmap --stream-count=10 -d /dev/video2 --stream-to=/tmp/test.raw

Signed-off-by: Helen Koike <helen.koike@collabora.com>

---

Changes in v2:
- rebase on top of new helpers prototypes

drivers/media/platform/vimc/vimc-capture.c | 28 +++++++-----
drivers/media/platform/vimc/vimc-streamer.c | 49 +++------------------
2 files changed, 23 insertions(+), 54 deletions(-)

diff --git a/drivers/media/platform/vimc/vimc-capture.c b/drivers/media/platform/vimc/vimc-capture.c
index 23e740c1c5c00..2206bfdec1c32 100644
--- a/drivers/media/platform/vimc/vimc-capture.c
+++ b/drivers/media/platform/vimc/vimc-capture.c
@@ -233,21 +233,27 @@ static int vimc_cap_start_streaming(struct vb2_queue *vq, unsigned int count)

vcap->sequence = 0;

- /* Start the media pipeline */
ret = media_pipeline_start(entity, &vcap->stream.pipe);
- if (ret) {
- vimc_cap_return_all_buffers(vcap, VB2_BUF_STATE_QUEUED);
- return ret;
- }
+ if (ret)
+ goto err_return_all_buffers;
+
+ ret = v4l2_pipeline_stream_enable(&vcap->vdev);
+ if (ret)
+ goto err_stop_media_pipe;

ret = vimc_streamer_s_stream(&vcap->stream, &vcap->ved, 1);
- if (ret) {
- media_pipeline_stop(entity);
- vimc_cap_return_all_buffers(vcap, VB2_BUF_STATE_QUEUED);
- return ret;
- }
+ if (ret)
+ goto err_stop_stream;

return 0;
+
+err_stop_stream:
+ v4l2_pipeline_stream_disable(&vcap->vdev);
+err_stop_media_pipe:
+ media_pipeline_stop(entity);
+err_return_all_buffers:
+ vimc_cap_return_all_buffers(vcap, VB2_BUF_STATE_QUEUED);
+ return ret;
}

/*
@@ -260,6 +266,8 @@ static void vimc_cap_stop_streaming(struct vb2_queue *vq)

vimc_streamer_s_stream(&vcap->stream, &vcap->ved, 0);

+ v4l2_pipeline_stream_disable(&vcap->vdev);
+
/* Stop the media pipeline */
media_pipeline_stop(&vcap->vdev.entity);

diff --git a/drivers/media/platform/vimc/vimc-streamer.c b/drivers/media/platform/vimc/vimc-streamer.c
index 65feb3c596db5..c0085f4695c2f 100644
--- a/drivers/media/platform/vimc/vimc-streamer.c
+++ b/drivers/media/platform/vimc/vimc-streamer.c
@@ -36,33 +36,6 @@ static struct media_entity *vimc_get_source_entity(struct media_entity *ent)
return NULL;
}

-/**
- * vimc_streamer_pipeline_terminate - Disable stream in all ved in stream
- *
- * @stream: the pointer to the stream structure with the pipeline to be
- * disabled.
- *
- * Calls s_stream to disable the stream in each entity of the pipeline
- *
- */
-static void vimc_streamer_pipeline_terminate(struct vimc_stream *stream)
-{
- struct vimc_ent_device *ved;
- struct v4l2_subdev *sd;
-
- while (stream->pipe_size) {
- stream->pipe_size--;
- ved = stream->ved_pipeline[stream->pipe_size];
- stream->ved_pipeline[stream->pipe_size] = NULL;
-
- if (!is_media_entity_v4l2_subdev(ved->ent))
- continue;
-
- sd = media_entity_to_v4l2_subdev(ved->ent);
- v4l2_subdev_call(sd, video, s_stream, 0);
- }
-}
-
/**
* vimc_streamer_pipeline_init - Initializes the stream structure
*
@@ -82,27 +55,15 @@ static int vimc_streamer_pipeline_init(struct vimc_stream *stream,
struct media_entity *entity;
struct video_device *vdev;
struct v4l2_subdev *sd;
- int ret = 0;

stream->pipe_size = 0;
while (stream->pipe_size < VIMC_STREAMER_PIPELINE_MAX_SIZE) {
if (!ved) {
- vimc_streamer_pipeline_terminate(stream);
+ stream->pipe_size = 0;
return -EINVAL;
}
stream->ved_pipeline[stream->pipe_size++] = ved;

- if (is_media_entity_v4l2_subdev(ved->ent)) {
- sd = media_entity_to_v4l2_subdev(ved->ent);
- ret = v4l2_subdev_call(sd, video, s_stream, 1);
- if (ret && ret != -ENOIOCTLCMD) {
- dev_err(ved->dev, "subdev_call error %s\n",
- ved->ent->name);
- vimc_streamer_pipeline_terminate(stream);
- return ret;
- }
- }
-
entity = vimc_get_source_entity(ved->ent);
/* Check if the end of the pipeline was reached */
if (!entity) {
@@ -111,7 +72,7 @@ static int vimc_streamer_pipeline_init(struct vimc_stream *stream,
dev_err(ved->dev,
"first entity in the pipe '%s' is not a source\n",
ved->ent->name);
- vimc_streamer_pipeline_terminate(stream);
+ stream->pipe_size = 0;
return -EPIPE;
}
return 0;
@@ -129,7 +90,7 @@ static int vimc_streamer_pipeline_init(struct vimc_stream *stream,
}
}

- vimc_streamer_pipeline_terminate(stream);
+ stream->pipe_size = 0;
return -EINVAL;
}

@@ -210,7 +171,7 @@ int vimc_streamer_s_stream(struct vimc_stream *stream,
if (IS_ERR(stream->kthread)) {
ret = PTR_ERR(stream->kthread);
dev_err(ved->dev, "kthread_run failed with %d\n", ret);
- vimc_streamer_pipeline_terminate(stream);
+ stream->pipe_size = 0;
stream->kthread = NULL;
return ret;
}
@@ -231,7 +192,7 @@ int vimc_streamer_s_stream(struct vimc_stream *stream,

stream->kthread = NULL;

- vimc_streamer_pipeline_terminate(stream);
+ stream->pipe_size = 0;
}

return 0;
--
2.26.0
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