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Subject[PATCH v3 2/9] media: vimc: Add get_frame callback
Date
In the process of making vimc compatible for multiple streams, we need
to create a frame passing process such that two different entities can
get the frame from a common entity. This isn't possible currently without
calling process_frame twice for the common entity, as process_frames
returns the frame which gets passed on.

So, to take care of this, add a get_frame callback to vimc device and
use it to get the frames for an entity from previous entity instead of
returning and passing the frames as an argument in process_frame.

Signed-off-by: Kaaira Gupta <kgupta@es.iitr.ac.in>
---
.../media/test-drivers/vimc/vimc-capture.c | 18 +++++++++++++++---
drivers/media/test-drivers/vimc/vimc-common.h | 7 ++++---
.../media/test-drivers/vimc/vimc-debayer.c | 19 ++++++++++++++++---
drivers/media/test-drivers/vimc/vimc-scaler.c | 18 +++++++++++++++---
drivers/media/test-drivers/vimc/vimc-sensor.c | 11 +++++++++--
.../media/test-drivers/vimc/vimc-streamer.c | 10 ++++++----
6 files changed, 65 insertions(+), 18 deletions(-)

diff --git a/drivers/media/test-drivers/vimc/vimc-capture.c b/drivers/media/test-drivers/vimc/vimc-capture.c
index c63496b17b9a..a8cbb8e4d5ba 100644
--- a/drivers/media/test-drivers/vimc/vimc-capture.c
+++ b/drivers/media/test-drivers/vimc/vimc-capture.c
@@ -355,12 +355,13 @@ static void vimc_cap_unregister(struct vimc_ent_device *ved)
video_unregister_device(&vcap->vdev);
}

-static void *vimc_cap_process_frame(struct vimc_ent_device *ved,
- const void *frame)
+static int vimc_cap_process_frame(struct vimc_ent_device *ved)
{
struct vimc_cap_device *vcap = container_of(ved, struct vimc_cap_device,
ved);
struct vimc_cap_buffer *vimc_buf;
+ struct v4l2_subdev *sd;
+ const void *frame;
void *vbuf;

spin_lock(&vcap->qlock);
@@ -370,7 +371,7 @@ static void *vimc_cap_process_frame(struct vimc_ent_device *ved,
typeof(*vimc_buf), list);
if (!vimc_buf) {
spin_unlock(&vcap->qlock);
- return ERR_PTR(-EAGAIN);
+ return -EAGAIN;
}

/* Remove this entry from the list */
@@ -385,12 +386,22 @@ static void *vimc_cap_process_frame(struct vimc_ent_device *ved,

vbuf = vb2_plane_vaddr(&vimc_buf->vb2.vb2_buf, 0);

+ sd = media_entity_to_v4l2_subdev(vimc_get_source_entity(ved->ent));
+ ved = v4l2_get_subdevdata(sd);
+ frame = ved->get_frame(ved);
+
memcpy(vbuf, frame, vcap->format.sizeimage);

/* Set it as ready */
vb2_set_plane_payload(&vimc_buf->vb2.vb2_buf, 0,
vcap->format.sizeimage);
vb2_buffer_done(&vimc_buf->vb2.vb2_buf, VB2_BUF_STATE_DONE);
+
+ return 0;
+}
+
+static void *vimc_cap_get_frame(struct vimc_ent_device *ved)
+{
return NULL;
}

@@ -455,6 +466,7 @@ static struct vimc_ent_device *vimc_cap_add(struct vimc_device *vimc,
vcap->ved.ent = &vcap->vdev.entity;
vcap->ved.process_frame = vimc_cap_process_frame;
vcap->ved.vdev_get_format = vimc_cap_get_format;
+ vcap->ved.get_frame = vimc_cap_get_frame;
vcap->ved.dev = vimc->mdev.dev;

/* Initialize the video_device struct */
diff --git a/drivers/media/test-drivers/vimc/vimc-common.h b/drivers/media/test-drivers/vimc/vimc-common.h
index 4c580d854007..287d66edff49 100644
--- a/drivers/media/test-drivers/vimc/vimc-common.h
+++ b/drivers/media/test-drivers/vimc/vimc-common.h
@@ -85,7 +85,8 @@ struct vimc_pix_map {
*
* @dev: a pointer of the device struct of the driver
* @ent: the pointer to struct media_entity for the node
- * @process_frame: callback send a frame to that node
+ * @get_frame: callback that sends a frame processed by the entity
+ * @process_frame: callback that processes a frame
* @vdev_get_format: callback that returns the current format a pad, used
* only when is_media_entity_v4l2_video_device(ent) returns
* true
@@ -101,8 +102,8 @@ struct vimc_pix_map {
struct vimc_ent_device {
struct device *dev;
struct media_entity *ent;
- void * (*process_frame)(struct vimc_ent_device *ved,
- const void *frame);
+ void * (*get_frame)(struct vimc_ent_device *ved);
+ int (*process_frame)(struct vimc_ent_device *ved);
void (*vdev_get_format)(struct vimc_ent_device *ved,
struct v4l2_pix_format *fmt);
};
diff --git a/drivers/media/test-drivers/vimc/vimc-debayer.c b/drivers/media/test-drivers/vimc/vimc-debayer.c
index c3f6fef34f68..f61e6e8899ac 100644
--- a/drivers/media/test-drivers/vimc/vimc-debayer.c
+++ b/drivers/media/test-drivers/vimc/vimc-debayer.c
@@ -491,17 +491,22 @@ static void vimc_deb_calc_rgb_sink(struct vimc_deb_device *vdeb,
}
}

-static void *vimc_deb_process_frame(struct vimc_ent_device *ved,
- const void *sink_frame)
+static int vimc_deb_process_frame(struct vimc_ent_device *ved)
{
struct vimc_deb_device *vdeb = container_of(ved, struct vimc_deb_device,
ved);
unsigned int rgb[3];
unsigned int i, j;
+ struct v4l2_subdev *sd;
+ const void *sink_frame;

/* If the stream in this node is not active, just return */
if (!vdeb->src_frame)
- return ERR_PTR(-EINVAL);
+ return -EINVAL;
+
+ sd = media_entity_to_v4l2_subdev(vimc_get_source_entity(ved->ent));
+ ved = v4l2_get_subdevdata(sd);
+ sink_frame = ved->get_frame(ved);

for (i = 0; i < vdeb->sink_fmt.height; i++)
for (j = 0; j < vdeb->sink_fmt.width; j++) {
@@ -509,6 +514,13 @@ static void *vimc_deb_process_frame(struct vimc_ent_device *ved,
vdeb->set_rgb_src(vdeb, i, j, rgb);
}

+ return 0;
+}
+
+static void *vimc_deb_get_frame(struct vimc_ent_device *ved)
+{
+ struct vimc_deb_device *vdeb = container_of(ved, struct vimc_deb_device,
+ ved);
return vdeb->src_frame;
}

@@ -593,6 +605,7 @@ static struct vimc_ent_device *vimc_deb_add(struct vimc_device *vimc,
goto err_free_hdl;

vdeb->ved.process_frame = vimc_deb_process_frame;
+ vdeb->ved.get_frame = vimc_deb_get_frame;
vdeb->ved.dev = vimc->mdev.dev;
vdeb->mean_win_size = vimc_deb_ctrl_mean_win_size.def;

diff --git a/drivers/media/test-drivers/vimc/vimc-scaler.c b/drivers/media/test-drivers/vimc/vimc-scaler.c
index 121fa7d62a2e..347f9cd4a168 100644
--- a/drivers/media/test-drivers/vimc/vimc-scaler.c
+++ b/drivers/media/test-drivers/vimc/vimc-scaler.c
@@ -455,18 +455,29 @@ static void vimc_sca_fill_src_frame(const struct vimc_sca_device *const vsca,
vimc_sca_scale_pix(vsca, i, j, sink_frame);
}

-static void *vimc_sca_process_frame(struct vimc_ent_device *ved,
- const void *sink_frame)
+static int vimc_sca_process_frame(struct vimc_ent_device *ved)
{
struct vimc_sca_device *vsca = container_of(ved, struct vimc_sca_device,
ved);
+ const void *sink_frame;
+ struct v4l2_subdev *sd;

/* If the stream in this node is not active, just return */
if (!vsca->src_frame)
- return ERR_PTR(-EINVAL);
+ return -EINVAL;

+ sd = media_entity_to_v4l2_subdev(vimc_get_source_entity(ved->ent));
+ ved = v4l2_get_subdevdata(sd);
+ sink_frame = ved->get_frame(ved);
vimc_sca_fill_src_frame(vsca, sink_frame);

+ return 0;
+};
+
+static void *vimc_sca_get_frame(struct vimc_ent_device *ved)
+{
+ struct vimc_sca_device *vsca = container_of(ved, struct vimc_sca_device,
+ ved);
return vsca->src_frame;
};

@@ -505,6 +516,7 @@ static struct vimc_ent_device *vimc_sca_add(struct vimc_device *vimc,
}

vsca->ved.process_frame = vimc_sca_process_frame;
+ vsca->ved.get_frame = vimc_sca_get_frame;
vsca->ved.dev = vimc->mdev.dev;

/* Initialize the frame format */
diff --git a/drivers/media/test-drivers/vimc/vimc-sensor.c b/drivers/media/test-drivers/vimc/vimc-sensor.c
index ba5db5a150b4..32a2c39de2cd 100644
--- a/drivers/media/test-drivers/vimc/vimc-sensor.c
+++ b/drivers/media/test-drivers/vimc/vimc-sensor.c
@@ -190,8 +190,7 @@ static const struct v4l2_subdev_pad_ops vimc_sen_pad_ops = {
.set_fmt = vimc_sen_set_fmt,
};

-static void *vimc_sen_process_frame(struct vimc_ent_device *ved,
- const void *sink_frame)
+static int vimc_sen_process_frame(struct vimc_ent_device *ved)
{
struct vimc_sen_device *vsen = container_of(ved, struct vimc_sen_device,
ved);
@@ -238,6 +237,13 @@ static void *vimc_sen_process_frame(struct vimc_ent_device *ved,
break;
}

+ return 0;
+}
+
+static void *vimc_sen_get_frame(struct vimc_ent_device *ved)
+{
+ struct vimc_sen_device *vsen = container_of(ved, struct vimc_sen_device,
+ ved);
return vsen->frame;
}

@@ -429,6 +435,7 @@ static struct vimc_ent_device *vimc_sen_add(struct vimc_device *vimc,
goto err_free_tpg;

vsen->ved.process_frame = vimc_sen_process_frame;
+ vsen->ved.get_frame = vimc_sen_get_frame;
vsen->ved.dev = vimc->mdev.dev;

/* Initialize the frame format */
diff --git a/drivers/media/test-drivers/vimc/vimc-streamer.c b/drivers/media/test-drivers/vimc/vimc-streamer.c
index 4f8384246042..c1644d69686d 100644
--- a/drivers/media/test-drivers/vimc/vimc-streamer.c
+++ b/drivers/media/test-drivers/vimc/vimc-streamer.c
@@ -125,7 +125,8 @@ static int vimc_streamer_pipeline_init(struct vimc_stream *stream,
static int vimc_streamer_thread(void *data)
{
struct vimc_stream *stream = data;
- u8 *frame = NULL;
+ struct vimc_ent_device *ved;
+ int ret;
int i;

set_freezable();
@@ -136,9 +137,10 @@ static int vimc_streamer_thread(void *data)
break;

for (i = stream->pipe_size - 1; i >= 0; i--) {
- frame = stream->ved_pipeline[i]->process_frame(
- stream->ved_pipeline[i], frame);
- if (!frame || IS_ERR(frame))
+ ved = stream->ved_pipeline[i];
+ ret = ved->process_frame(ved);
+
+ if (ret)
break;
}
//wait for 60hz
--
2.17.1
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