From: Sakari Ailus <sakari.ai...@linux.intel.com>
This moves the pipe and stream_count fields from struct media_entity to
struct media_pad. Effectively streams become pad-specific rather than
being stream specific, allowing several independent streams to traverse a
single entity.
Signed-off-by: Sakari Ailus <sakari.ai...@linux.intel.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund+rene...@ragnatech.se>
---
drivers/media/media-entity.c | 61 ++++++++++++-------
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-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 | 17 ++++--
14 files changed, 61 insertions(+), 41 deletions(-)
diff --git a/drivers/media/media-entity.c b/drivers/media/media-entity.c
index 70db03fa33a21db1..13260149c4dfc90c 100644
--- a/drivers/media/media-entity.c
+++ b/drivers/media/media-entity.c
@@ -419,7 +419,7 @@ __must_check int __media_pipeline_start(struct media_entity
*entity,
struct media_pad *pad = entity->pads;
struct media_pad *pad_err = pad;
struct media_link *link;
- int ret;
+ int ret = 0;
if (!pipe->streaming_count++) {
ret = media_graph_walk_init(&pipe->graph, mdev);
@@ -431,21 +431,27 @@ __must_check int __media_pipeline_start(struct
media_entity *entity,
while ((pad = media_graph_walk_next(graph))) {
struct media_entity *entity = pad->entity;
+ unsigned int i;
+ bool skip_validation = pad->pipe;
DECLARE_BITMAP(active, MEDIA_ENTITY_MAX_PADS);
DECLARE_BITMAP(has_no_links, MEDIA_ENTITY_MAX_PADS);
- entity->stream_count++;
+ for (i = 0; i < entity->num_pads; i++) {
+ struct media_pad *iter = &entity->pads[i];
- if (WARN_ON(entity->pipe && entity->pipe != pipe)) {
- ret = -EBUSY;
- goto error;
+ if (iter->pipe && WARN_ON(iter->pipe != pipe))
+ 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)
+ if (skip_validation)
continue;
if (!entity->ops || !entity->ops->link_validate)
@@ -514,19 +520,24 @@ __must_check int __media_pipeline_start(struct
media_entity *entity,
while ((pad_err = media_graph_walk_next(graph))) {
struct media_entity *entity_err = pad_err->entity;
+ unsigned int i;
+
+ for (i = 0; i < entity_err->num_pads; i++) {
+ struct media_pad *iter = &entity_err->pads[i];
- /* 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;
+ /* 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;
}
@@ -553,7 +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;
@@ -567,13 +578,17 @@ void __media_pipeline_stop(struct media_entity *entity)
media_graph_walk_start(graph, entity->pads);
while ((pad = media_graph_walk_next(graph))) {
- struct media_entity *entity = pad->entity;
+ unsigned int i;
- /* 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;
+ for (i = 0; i < entity->num_pads; i++) {
+ struct media_pad *iter = &entity->pads[i];
+
+ /* 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;
+ }
}
}
@@ -865,7 +880,7 @@ 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)
@@ -881,8 +896,8 @@ 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 9a48c0f69320ba35..79d128a57e87fd58 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 96f0a8a0dcae591f..dbadcba6739a286b 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 77fb7987b42f33cd..3663dfd00cadc2f0 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 dc11b732dc05b00b..f354cd7ceb8ffce5 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 f6a2082b4a0a7708..8f4146c25a1b1293 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-dma.c
b/drivers/media/platform/rcar-vin/rcar-dma.c
index 92323310f7352147..e749096926f34d4a 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 a2a329336243bdc7..f27a7be5f5d0f0b5 100644
--- a/drivers/media/platform/xilinx/xilinx-dma.c
+++ b/drivers/media/platform/xilinx/xilinx-dma.c
@@ -406,7 +406,7 @@ 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 e95d136c153a8f5f..c12e053ff41eed1c 100644
--- a/drivers/media/platform/xilinx/xilinx-dma.h
+++ b/drivers/media/platform/xilinx/xilinx-dma.h
@@ -50,7 +50,7 @@ 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 0eaa353d5cb39768..ba9d9a8337cb159e 100644
--- a/drivers/staging/media/imx/imx-media-utils.c
+++ b/drivers/staging/media/imx/imx-media-utils.c
@@ -917,7 +917,7 @@ 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 c8be1db532ab2555..030808b222cf3ae5 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 1271bbacf9e7bdeb..65f1e358271b3743 100644
--- a/drivers/staging/media/omap4iss/iss_video.c
+++ b/drivers/staging/media/omap4iss/iss_video.c
@@ -877,7 +877,7 @@ 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 f22489edb5624af2..cdea8543b3f93ecf 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 cde6350d752bb0ae..ca0b79288ea7fd11 100644
--- a/include/media/media-entity.h
+++ b/include/media/media-entity.h
@@ -188,15 +188,25 @@ enum media_pad_signal_type {
*
* @graph_obj: Embedded structure containing the media object common data
* @entity: Entity this pad belongs to
+ * @pipe: Pipeline this entity belongs to.
+ * @stream_count: Stream count for the entity.
* @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 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.
*/
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 +284,7 @@ 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.
@@ -289,7 +297,7 @@ enum media_entity_type {
*
* .. note::
*
- * @stream_count and @use_count reference counts must never be
+ * @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.
@@ -311,11 +319,8 @@ struct media_entity {
const struct media_entity_operations *ops;
- int stream_count;
int use_count;
- struct media_pipeline *pipe;
-
union {
struct {
u32 major;
--
2.19.1
