From: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
This moves the pipe and stream_count fields from struct media_entity to
struct media_pad. Effectively streams become pad-specific rather than
being entity specific, allowing several independent streams to traverse a
single entity and an entity to be part of several streams.
Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@xxxxxxxxxxxx>
Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
- Update documentation to use 'pads'
- Use the media pad iterator in media_entity.c
- Update rcar-dma.c to use the new per-pad stream count
Signed-off-by: Jacopo Mondi <jacopo+renesas@xxxxxxxxxx>
---
drivers/media/media-entity.c | 68 +++++++++++--------
drivers/media/platform/exynos4-is/fimc-isp.c | 2 +-
drivers/media/platform/exynos4-is/fimc-lite.c | 2 +-
drivers/media/platform/omap3isp/isp.c | 2 +-
drivers/media/platform/omap3isp/ispvideo.c | 2 +-
drivers/media/platform/omap3isp/ispvideo.h | 2 +-
drivers/media/platform/rcar-vin/rcar-core.c | 16 +++--
drivers/media/platform/rcar-vin/rcar-dma.c | 2 +-
drivers/media/platform/xilinx/xilinx-dma.c | 2 +-
drivers/media/platform/xilinx/xilinx-dma.h | 2 +-
drivers/staging/media/imx/imx-media-utils.c | 2 +-
drivers/staging/media/omap4iss/iss.c | 2 +-
drivers/staging/media/omap4iss/iss_video.c | 2 +-
drivers/staging/media/omap4iss/iss_video.h | 2 +-
include/media/media-entity.h | 21 +++---
15 files changed, 73 insertions(+), 56 deletions(-)
diff --git a/drivers/media/media-entity.c b/drivers/media/media-entity.c
index b092cbf25ebb..9f7d9125b245 100644
--- a/drivers/media/media-entity.c
+++ b/drivers/media/media-entity.c
@@ -431,24 +431,28 @@ __must_check int __media_pipeline_start(struct media_entity *entity,
while ((pad = media_graph_walk_next(graph))) {
struct media_entity *entity = pad->entity;
+ bool skip_validation = pad->pipe;
+ struct media_pad *iter;
DECLARE_BITMAP(active, MEDIA_ENTITY_MAX_PADS);
DECLARE_BITMAP(has_no_links, MEDIA_ENTITY_MAX_PADS);
- entity->stream_count++;
-
- if (entity->pipe && entity->pipe != pipe) {
- pr_err("Pipe active for %s. Can't start for %s\n",
- entity->name,
- entity_err->name);
- ret = -EBUSY;
- goto error;
+ media_entity_for_each_pad(entity, iter) {
+ if (iter->pipe && iter->pipe != pipe) {
+ pr_err("Pipe active for %s. Can't start for %s\n",
+ entity->name, iter->entity->name);
+ ret = -EBUSY;
+ } else {
+ iter->pipe = pipe;
+ }
+ iter->stream_count++;
}
- entity->pipe = pipe;
+ if (ret)
+ goto error;
- /* Already streaming --- no need to check. */
- if (entity->stream_count > 1)
+ /* Already part of the pipeline, skip validation. */
+ if (skip_validation)
continue;
if (!entity->ops || !entity->ops->link_validate)
@@ -517,20 +521,23 @@ __must_check int __media_pipeline_start(struct media_entity *entity,
media_graph_walk_start(graph, pad_err);
while ((pad_err = media_graph_walk_next(graph))) {
- struct media_entity *entity_err = pad_err->entity;
-
- /* Sanity check for negative stream_count */
- if (!WARN_ON_ONCE(entity_err->stream_count <= 0)) {
- entity_err->stream_count--;
- if (entity_err->stream_count == 0)
- entity_err->pipe = NULL;
+ struct media_entity *entity = pad->entity;
+ struct media_pad *iter;
+
+ media_entity_for_each_pad(entity, iter) {
+ /* Sanity check for negative stream_count */
+ if (!WARN_ON_ONCE(iter->stream_count <= 0)) {
+ --iter->stream_count;
+ if (iter->stream_count == 0)
+ iter->pipe = NULL;
+ }
}
/*
* We haven't increased stream_count further than this
* so we quit here.
*/
- if (pad_err == pad)
+ if (pad_err->entity == pad->entity)
break;
}
@@ -557,7 +564,7 @@ EXPORT_SYMBOL_GPL(media_pipeline_start);
void __media_pipeline_stop(struct media_entity *entity)
{
- struct media_pipeline *pipe = entity->pipe;
+ struct media_pipeline *pipe = entity->pads->pipe;
struct media_graph *graph = &pipe->graph;
struct media_pad *pad;
@@ -572,12 +579,15 @@ void __media_pipeline_stop(struct media_entity *entity)
while ((pad = media_graph_walk_next(graph))) {
struct media_entity *entity = pad->entity;
-
- /* Sanity check for negative stream_count */
- if (!WARN_ON_ONCE(entity->stream_count <= 0)) {
- entity->stream_count--;
- if (entity->stream_count == 0)
- entity->pipe = NULL;
+ struct media_pad *iter;
+
+ media_entity_for_each_pad(entity, iter) {
+ /* Sanity check for negative stream_count */
+ if (!WARN_ON_ONCE(iter->stream_count <= 0)) {
+ iter->stream_count--;
+ if (iter->stream_count == 0)
+ iter->pipe = NULL;
+ }
}
}
@@ -842,7 +852,7 @@ int __media_entity_setup_link(struct media_link *link, u32 flags)
{
const u32 mask = MEDIA_LNK_FL_ENABLED;
struct media_device *mdev;
- struct media_entity *source, *sink;
+ struct media_pad *source, *sink;
int ret = -EBUSY;
if (link == NULL)
@@ -858,8 +868,8 @@ int __media_entity_setup_link(struct media_link *link, u32 flags)
if (link->flags == flags)
return 0;
- source = link->source->entity;
- sink = link->sink->entity;
+ source = link->source;
+ sink = link->sink;
if (!(link->flags & MEDIA_LNK_FL_DYNAMIC) &&
(source->stream_count || sink->stream_count))
diff --git a/drivers/media/platform/exynos4-is/fimc-isp.c b/drivers/media/platform/exynos4-is/fimc-isp.c
index 9a48c0f69320..79d128a57e87 100644
--- a/drivers/media/platform/exynos4-is/fimc-isp.c
+++ b/drivers/media/platform/exynos4-is/fimc-isp.c
@@ -229,7 +229,7 @@ static int fimc_isp_subdev_set_fmt(struct v4l2_subdev *sd,
}
}
} else {
- if (sd->entity.stream_count == 0) {
+ if (sd->entity.pads->stream_count == 0) {
if (fmt->pad == FIMC_ISP_SD_PAD_SINK) {
struct v4l2_subdev_format format = *fmt;
diff --git a/drivers/media/platform/exynos4-is/fimc-lite.c b/drivers/media/platform/exynos4-is/fimc-lite.c
index 96f0a8a0dcae..dbadcba6739a 100644
--- a/drivers/media/platform/exynos4-is/fimc-lite.c
+++ b/drivers/media/platform/exynos4-is/fimc-lite.c
@@ -1096,7 +1096,7 @@ static int fimc_lite_subdev_set_fmt(struct v4l2_subdev *sd,
mutex_lock(&fimc->lock);
if ((atomic_read(&fimc->out_path) == FIMC_IO_ISP &&
- sd->entity.stream_count > 0) ||
+ sd->entity.pads->stream_count > 0) ||
(atomic_read(&fimc->out_path) == FIMC_IO_DMA &&
vb2_is_busy(&fimc->vb_queue))) {
mutex_unlock(&fimc->lock);
diff --git a/drivers/media/platform/omap3isp/isp.c b/drivers/media/platform/omap3isp/isp.c
index bd57174d81a7..322a7ebdaf0d 100644
--- a/drivers/media/platform/omap3isp/isp.c
+++ b/drivers/media/platform/omap3isp/isp.c
@@ -927,7 +927,7 @@ static int isp_pipeline_is_last(struct media_entity *me)
struct isp_pipeline *pipe;
struct media_pad *pad;
- if (!me->pipe)
+ if (!me->pads->pipe)
return 0;
pipe = to_isp_pipeline(me);
if (pipe->stream_state == ISP_PIPELINE_STREAM_STOPPED)
diff --git a/drivers/media/platform/omap3isp/ispvideo.c b/drivers/media/platform/omap3isp/ispvideo.c
index be364eb64e40..aed6c0a08284 100644
--- a/drivers/media/platform/omap3isp/ispvideo.c
+++ b/drivers/media/platform/omap3isp/ispvideo.c
@@ -1102,7 +1102,7 @@ isp_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
/* Start streaming on the pipeline. No link touching an entity in the
* pipeline can be activated or deactivated once streaming is started.
*/
- pipe = video->video.entity.pipe
+ pipe = video->video.entity.pads->pipe
? to_isp_pipeline(&video->video.entity) : &video->pipe;
ret = media_entity_enum_init(&pipe->ent_enum, &video->isp->media_dev);
diff --git a/drivers/media/platform/omap3isp/ispvideo.h b/drivers/media/platform/omap3isp/ispvideo.h
index f6a2082b4a0a..8f4146c25a1b 100644
--- a/drivers/media/platform/omap3isp/ispvideo.h
+++ b/drivers/media/platform/omap3isp/ispvideo.h
@@ -103,7 +103,7 @@ struct isp_pipeline {
};
#define to_isp_pipeline(__e) \
- container_of((__e)->pipe, struct isp_pipeline, pipe)
+ container_of((__e)->pads->pipe, struct isp_pipeline, pipe)
static inline int isp_pipeline_ready(struct isp_pipeline *pipe)
{
diff --git a/drivers/media/platform/rcar-vin/rcar-core.c b/drivers/media/platform/rcar-vin/rcar-core.c
index 64f9cf790445..64519b3097f7 100644
--- a/drivers/media/platform/rcar-vin/rcar-core.c
+++ b/drivers/media/platform/rcar-vin/rcar-core.c
@@ -132,13 +132,17 @@ static int rvin_group_link_notify(struct media_link *link, u32 flags,
return 0;
/*
- * Don't allow link changes if any entity in the graph is
- * streaming, modifying the CHSEL register fields can disrupt
- * running streams.
+ * Don't allow link changes if any stream in the graph is active as
+ * modifying the CHSEL register fields can disrupt running streams.
*/
- media_device_for_each_entity(entity, &group->mdev)
- if (entity->stream_count)
- return -EBUSY;
+ media_device_for_each_entity(entity, &group->mdev) {
+ struct media_pad *iter;
+
+ media_entity_for_each_pad(entity, iter) {
+ if (iter->stream_count)
+ return -EBUSY;
+ }
+ }
mutex_lock(&group->lock);
diff --git a/drivers/media/platform/rcar-vin/rcar-dma.c b/drivers/media/platform/rcar-vin/rcar-dma.c
index 2207a31d355e..c8437810ebf8 100644
--- a/drivers/media/platform/rcar-vin/rcar-dma.c
+++ b/drivers/media/platform/rcar-vin/rcar-dma.c
@@ -1128,7 +1128,7 @@ static int rvin_set_stream(struct rvin_dev *vin, int on)
*/
mdev = vin->vdev.entity.graph_obj.mdev;
mutex_lock(&mdev->graph_mutex);
- pipe = sd->entity.pipe ? sd->entity.pipe : &vin->vdev.pipe;
+ pipe = sd->entity.pads->pipe ? sd->entity.pads->pipe : &vin->vdev.pipe;
ret = __media_pipeline_start(&vin->vdev.entity, pipe);
mutex_unlock(&mdev->graph_mutex);
if (ret)
diff --git a/drivers/media/platform/xilinx/xilinx-dma.c b/drivers/media/platform/xilinx/xilinx-dma.c
index 66063ccbf84d..08ff171d7aac 100644
--- a/drivers/media/platform/xilinx/xilinx-dma.c
+++ b/drivers/media/platform/xilinx/xilinx-dma.c
@@ -403,7 +403,7 @@ static int xvip_dma_start_streaming(struct vb2_queue *vq, unsigned int count)
* Use the pipeline object embedded in the first DMA object that starts
* streaming.
*/
- pipe = dma->video.entity.pipe
+ pipe = dma->video.entity.pads->pipe
? to_xvip_pipeline(&dma->video.entity) : &dma->pipe;
ret = media_pipeline_start(&dma->video.entity, &pipe->pipe);
diff --git a/drivers/media/platform/xilinx/xilinx-dma.h b/drivers/media/platform/xilinx/xilinx-dma.h
index 5aec4d17eb21..45b815e83d69 100644
--- a/drivers/media/platform/xilinx/xilinx-dma.h
+++ b/drivers/media/platform/xilinx/xilinx-dma.h
@@ -47,7 +47,7 @@ struct xvip_pipeline {
static inline struct xvip_pipeline *to_xvip_pipeline(struct media_entity *e)
{
- return container_of(e->pipe, struct xvip_pipeline, pipe);
+ return container_of(e->pads->pipe, struct xvip_pipeline, pipe);
}
/**
diff --git a/drivers/staging/media/imx/imx-media-utils.c b/drivers/staging/media/imx/imx-media-utils.c
index 1c63a2765a81..cc10f2d5b51b 100644
--- a/drivers/staging/media/imx/imx-media-utils.c
+++ b/drivers/staging/media/imx/imx-media-utils.c
@@ -936,7 +936,7 @@ int imx_media_pipeline_set_stream(struct imx_media_dev *imxmd,
__media_pipeline_stop(entity);
} else {
v4l2_subdev_call(sd, video, s_stream, 0);
- if (entity->pipe)
+ if (entity->pads->pipe)
__media_pipeline_stop(entity);
}
diff --git a/drivers/staging/media/omap4iss/iss.c b/drivers/staging/media/omap4iss/iss.c
index c8be1db532ab..030808b222cf 100644
--- a/drivers/staging/media/omap4iss/iss.c
+++ b/drivers/staging/media/omap4iss/iss.c
@@ -543,7 +543,7 @@ static int iss_pipeline_is_last(struct media_entity *me)
struct iss_pipeline *pipe;
struct media_pad *pad;
- if (!me->pipe)
+ if (!me->pads->pipe)
return 0;
pipe = to_iss_pipeline(me);
if (pipe->stream_state == ISS_PIPELINE_STREAM_STOPPED)
diff --git a/drivers/staging/media/omap4iss/iss_video.c b/drivers/staging/media/omap4iss/iss_video.c
index 82095f627d65..2a2f7a7983db 100644
--- a/drivers/staging/media/omap4iss/iss_video.c
+++ b/drivers/staging/media/omap4iss/iss_video.c
@@ -878,7 +878,7 @@ iss_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
* Start streaming on the pipeline. No link touching an entity in the
* pipeline can be activated or deactivated once streaming is started.
*/
- pipe = pad->entity->pipe
+ pipe = pad->pipe
? to_iss_pipeline(pad->entity) : &video->pipe;
pipe->external = NULL;
pipe->external_rate = 0;
diff --git a/drivers/staging/media/omap4iss/iss_video.h b/drivers/staging/media/omap4iss/iss_video.h
index f22489edb562..cdea8543b3f9 100644
--- a/drivers/staging/media/omap4iss/iss_video.h
+++ b/drivers/staging/media/omap4iss/iss_video.h
@@ -94,7 +94,7 @@ struct iss_pipeline {
};
#define to_iss_pipeline(__e) \
- container_of((__e)->pipe, struct iss_pipeline, pipe)
+ container_of((__e)->pads->pipe, struct iss_pipeline, pipe)
static inline int iss_pipeline_ready(struct iss_pipeline *pipe)
{
diff --git a/include/media/media-entity.h b/include/media/media-entity.h
index 76785a6151de..55d48b337b46 100644
--- a/include/media/media-entity.h
+++ b/include/media/media-entity.h
@@ -188,15 +188,24 @@ enum media_pad_signal_type {
*
* @graph_obj: Embedded structure containing the media object common data
* @entity: Entity this pad belongs to
+ * @pipe: Pipeline this pad belongs to.
+ * @stream_count: Stream count for the pad.
* @index: Pad index in the entity pads array, numbered from 0 to n
* @sig_type: Type of the signal inside a media pad
* @flags: Pad flags, as defined in
* :ref:`include/uapi/linux/media.h <media_header>`
* (seek for ``MEDIA_PAD_FL_*``)
+ * .. note::
+ *
+ * @stream_count reference count must never be negative, but is a signed
+ * integer on purpose: a simple ``WARN_ON(<0)`` check can be used to
+ * detect reference count bugs that would make them negative.
*/
struct media_pad {
struct media_gobj graph_obj; /* must be first field in struct */
struct media_entity *entity;
+ struct media_pipeline *pipe;
+ int stream_count;
u16 index;
enum media_pad_signal_type sig_type;
unsigned long flags;
@@ -274,9 +283,7 @@ enum media_entity_type {
* @pads: Pads array with the size defined by @num_pads.
* @links: List of data links.
* @ops: Entity operations.
- * @stream_count: Stream count for the entity.
* @use_count: Use count for the entity.
- * @pipe: Pipeline this entity belongs to.
* @info: Union with devnode information. Kept just for backward
* compatibility.
* @info.dev: Contains device major and minor info.
@@ -289,10 +296,9 @@ enum media_entity_type {
*
* .. note::
*
- * @stream_count and @use_count reference counts must never be
- * negative, but are signed integers on purpose: a simple ``WARN_ON(<0)``
- * check can be used to detect reference count bugs that would make them
- * negative.
+ * @use_count reference count must never be negative, but is a signed
+ * integer on purpose: a simple ``WARN_ON(<0)`` check can be used to
+ * detect reference count bugs that would make them negative.
*/
struct media_entity {
struct media_gobj graph_obj; /* must be first field in struct */
@@ -311,11 +317,8 @@ struct media_entity {
const struct media_entity_operations *ops;
- int stream_count;
int use_count;
- struct media_pipeline *pipe;
-
union {
struct {
u32 major;
--
2.21.0
