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Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0500-media-v4l2-mem2mem-allow-request-job-buffer-processi.patch')
-rw-r--r--target/linux/bcm27xx/patches-5.4/950-0500-media-v4l2-mem2mem-allow-request-job-buffer-processi.patch274
1 files changed, 0 insertions, 274 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0500-media-v4l2-mem2mem-allow-request-job-buffer-processi.patch b/target/linux/bcm27xx/patches-5.4/950-0500-media-v4l2-mem2mem-allow-request-job-buffer-processi.patch
deleted file mode 100644
index b43a4d534a..0000000000
--- a/target/linux/bcm27xx/patches-5.4/950-0500-media-v4l2-mem2mem-allow-request-job-buffer-processi.patch
+++ /dev/null
@@ -1,274 +0,0 @@
-From b8ae9d55d468a9f55524296247dba93531c29c99 Mon Sep 17 00:00:00 2001
-From: John Cox <jc@kynesim.co.uk>
-Date: Thu, 5 Mar 2020 14:46:54 +0000
-Subject: [PATCH] media: v4l2-mem2mem: allow request job buffer
- processing after job finish
-
-Allow the capture buffer to be detached from a v4l2 request job such
-that another job can start before the capture buffer is returned. This
-allows h/w codecs that can process multiple requests at the same time
-to operate more efficiently.
-
-Signed-off-by: John Cox <jc@kynesim.co.uk>
----
- drivers/media/v4l2-core/v4l2-mem2mem.c | 105 +++++++++++++++++++++++--
- include/media/v4l2-mem2mem.h | 47 +++++++++++
- include/media/videobuf2-v4l2.h | 3 +
- 3 files changed, 149 insertions(+), 6 deletions(-)
-
---- a/drivers/media/v4l2-core/v4l2-mem2mem.c
-+++ b/drivers/media/v4l2-core/v4l2-mem2mem.c
-@@ -399,15 +399,18 @@ static void v4l2_m2m_cancel_job(struct v
- {
- struct v4l2_m2m_dev *m2m_dev;
- unsigned long flags;
-+ bool det_abort_req;
-
- m2m_dev = m2m_ctx->m2m_dev;
- spin_lock_irqsave(&m2m_dev->job_spinlock, flags);
-
-+ det_abort_req = !list_empty(&m2m_ctx->det_list);
- m2m_ctx->job_flags |= TRANS_ABORT;
- if (m2m_ctx->job_flags & TRANS_RUNNING) {
- spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags);
- if (m2m_dev->m2m_ops->job_abort)
- m2m_dev->m2m_ops->job_abort(m2m_ctx->priv);
-+ det_abort_req = false;
- dprintk("m2m_ctx %p running, will wait to complete\n", m2m_ctx);
- wait_event(m2m_ctx->finished,
- !(m2m_ctx->job_flags & TRANS_RUNNING));
-@@ -421,6 +424,11 @@ static void v4l2_m2m_cancel_job(struct v
- /* Do nothing, was not on queue/running */
- spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags);
- }
-+
-+ /* Wait for detached buffers to come back too */
-+ if (det_abort_req && m2m_dev->m2m_ops->job_abort)
-+ m2m_dev->m2m_ops->job_abort(m2m_ctx->priv);
-+ wait_event(m2m_ctx->det_empty, list_empty(&m2m_ctx->det_list));
- }
-
- /*
-@@ -458,6 +466,7 @@ static bool _v4l2_m2m_job_finish(struct
-
- list_del(&m2m_dev->curr_ctx->queue);
- m2m_dev->curr_ctx->job_flags &= ~(TRANS_QUEUED | TRANS_RUNNING);
-+ m2m_ctx->cap_detached = false;
- wake_up(&m2m_dev->curr_ctx->finished);
- m2m_dev->curr_ctx = NULL;
- return true;
-@@ -485,6 +494,80 @@ void v4l2_m2m_job_finish(struct v4l2_m2m
- }
- EXPORT_SYMBOL(v4l2_m2m_job_finish);
-
-+struct vb2_v4l2_buffer *_v4l2_m2m_cap_buf_detach(struct v4l2_m2m_ctx *m2m_ctx)
-+{
-+ struct vb2_v4l2_buffer *buf;
-+
-+ buf = v4l2_m2m_dst_buf_remove(m2m_ctx);
-+ list_add_tail(&container_of(buf, struct v4l2_m2m_buffer, vb)->list,
-+ &m2m_ctx->det_list);
-+ m2m_ctx->cap_detached = true;
-+ buf->is_held = true;
-+ buf->det_state = VB2_BUF_STATE_ACTIVE;
-+
-+ return buf;
-+}
-+
-+struct vb2_v4l2_buffer *v4l2_m2m_cap_buf_detach(struct v4l2_m2m_dev *m2m_dev,
-+ struct v4l2_m2m_ctx *m2m_ctx)
-+{
-+ unsigned long flags;
-+ struct vb2_v4l2_buffer *src_buf, *dst_buf;
-+
-+ spin_lock_irqsave(&m2m_dev->job_spinlock, flags);
-+
-+ dst_buf = NULL;
-+ src_buf = v4l2_m2m_next_src_buf(m2m_ctx);
-+
-+ if (!(src_buf->flags & V4L2_BUF_FLAG_M2M_HOLD_CAPTURE_BUF) &&
-+ !m2m_ctx->cap_detached)
-+ dst_buf = _v4l2_m2m_cap_buf_detach(m2m_ctx);
-+
-+ spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags);
-+ return dst_buf;
-+}
-+EXPORT_SYMBOL(v4l2_m2m_cap_buf_detach);
-+
-+static void _v4l2_m2m_cap_buf_return(struct v4l2_m2m_ctx *m2m_ctx,
-+ struct vb2_v4l2_buffer *buf,
-+ enum vb2_buffer_state state)
-+{
-+ buf->det_state = state;
-+
-+ /*
-+ * Always signal done in the order we got stuff
-+ * Stop if we find a buf that is still in use
-+ */
-+ while (!list_empty(&m2m_ctx->det_list)) {
-+ buf = &list_first_entry(&m2m_ctx->det_list,
-+ struct v4l2_m2m_buffer, list)->vb;
-+ state = buf->det_state;
-+ if (state != VB2_BUF_STATE_DONE &&
-+ state != VB2_BUF_STATE_ERROR)
-+ return;
-+ list_del(&container_of(buf, struct v4l2_m2m_buffer, vb)->list);
-+ buf->det_state = VB2_BUF_STATE_DEQUEUED;
-+ v4l2_m2m_buf_done(buf, state);
-+ }
-+ wake_up(&m2m_ctx->det_empty);
-+}
-+
-+void v4l2_m2m_cap_buf_return(struct v4l2_m2m_dev *m2m_dev,
-+ struct v4l2_m2m_ctx *m2m_ctx,
-+ struct vb2_v4l2_buffer *buf,
-+ enum vb2_buffer_state state)
-+{
-+ unsigned long flags;
-+
-+ if (!buf)
-+ return;
-+
-+ spin_lock_irqsave(&m2m_dev->job_spinlock, flags);
-+ _v4l2_m2m_cap_buf_return(m2m_ctx, buf, state);
-+ spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags);
-+}
-+EXPORT_SYMBOL(v4l2_m2m_cap_buf_return);
-+
- void v4l2_m2m_buf_done_and_job_finish(struct v4l2_m2m_dev *m2m_dev,
- struct v4l2_m2m_ctx *m2m_ctx,
- enum vb2_buffer_state state)
-@@ -495,15 +578,23 @@ void v4l2_m2m_buf_done_and_job_finish(st
-
- spin_lock_irqsave(&m2m_dev->job_spinlock, flags);
- src_buf = v4l2_m2m_src_buf_remove(m2m_ctx);
-- dst_buf = v4l2_m2m_next_dst_buf(m2m_ctx);
-
-- if (WARN_ON(!src_buf || !dst_buf))
-+ if (WARN_ON(!src_buf))
- goto unlock;
- v4l2_m2m_buf_done(src_buf, state);
-- dst_buf->is_held = src_buf->flags & V4L2_BUF_FLAG_M2M_HOLD_CAPTURE_BUF;
-- if (!dst_buf->is_held) {
-- v4l2_m2m_dst_buf_remove(m2m_ctx);
-- v4l2_m2m_buf_done(dst_buf, state);
-+
-+ if (!m2m_ctx->cap_detached) {
-+ dst_buf = v4l2_m2m_next_dst_buf(m2m_ctx);
-+ if (WARN_ON(!dst_buf))
-+ goto unlock;
-+
-+ dst_buf->is_held = src_buf->flags
-+ & V4L2_BUF_FLAG_M2M_HOLD_CAPTURE_BUF;
-+
-+ if (!dst_buf->is_held) {
-+ dst_buf = _v4l2_m2m_cap_buf_detach(m2m_ctx);
-+ _v4l2_m2m_cap_buf_return(m2m_ctx, dst_buf, state);
-+ }
- }
- schedule_next = _v4l2_m2m_job_finish(m2m_dev, m2m_ctx);
- unlock:
-@@ -981,12 +1072,14 @@ struct v4l2_m2m_ctx *v4l2_m2m_ctx_init(s
- m2m_ctx->priv = drv_priv;
- m2m_ctx->m2m_dev = m2m_dev;
- init_waitqueue_head(&m2m_ctx->finished);
-+ init_waitqueue_head(&m2m_ctx->det_empty);
-
- out_q_ctx = &m2m_ctx->out_q_ctx;
- cap_q_ctx = &m2m_ctx->cap_q_ctx;
-
- INIT_LIST_HEAD(&out_q_ctx->rdy_queue);
- INIT_LIST_HEAD(&cap_q_ctx->rdy_queue);
-+ INIT_LIST_HEAD(&m2m_ctx->det_list);
- spin_lock_init(&out_q_ctx->rdy_spinlock);
- spin_lock_init(&cap_q_ctx->rdy_spinlock);
-
---- a/include/media/v4l2-mem2mem.h
-+++ b/include/media/v4l2-mem2mem.h
-@@ -88,6 +88,9 @@ struct v4l2_m2m_queue_ctx {
- * %TRANS_QUEUED, %TRANS_RUNNING and %TRANS_ABORT.
- * @finished: Wait queue used to signalize when a job queue finished.
- * @priv: Instance private data
-+ * @cap_detached: Current job's capture buffer has been detached
-+ * @det_list: List of detached (post-job but still in flight) capture buffers
-+ * @det_empty: Wait queue signalled when det_list goes empty
- *
- * The memory to memory context is specific to a file handle, NOT to e.g.
- * a device.
-@@ -111,6 +114,11 @@ struct v4l2_m2m_ctx {
- wait_queue_head_t finished;
-
- void *priv;
-+
-+ /* Detached buffer handling */
-+ bool cap_detached;
-+ struct list_head det_list;
-+ wait_queue_head_t det_empty;
- };
-
- /**
-@@ -216,6 +224,45 @@ v4l2_m2m_buf_done(struct vb2_v4l2_buffer
- }
-
- /**
-+ * v4l2_m2m_cap_buf_detach() - detach the capture buffer from the job and
-+ * return it.
-+ *
-+ * @m2m_dev: opaque pointer to the internal data to handle M2M context
-+ * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx
-+ *
-+ * This function is designed to be used in conjunction with
-+ * v4l2_m2m_buf_done_and_job_finish(). It allows the next job to start
-+ * execution before the capture buffer is returned to the user which can be
-+ * important if the underlying processing has multiple phases that are more
-+ * efficiently executed in parallel.
-+ *
-+ * If used then it must be called before v4l2_m2m_buf_done_and_job_finish()
-+ * as otherwise the buffer will have already gone.
-+ *
-+ * It is the callers reponsibilty to ensure that all detached buffers are
-+ * returned.
-+ */
-+struct vb2_v4l2_buffer *v4l2_m2m_cap_buf_detach(struct v4l2_m2m_dev *m2m_dev,
-+ struct v4l2_m2m_ctx *m2m_ctx);
-+
-+/**
-+ * v4l2_m2m_cap_buf_return() - return a capture buffer, previously detached
-+ * with v4l2_m2m_cap_buf_detach() to the user.
-+ *
-+ * @m2m_dev: opaque pointer to the internal data to handle M2M context
-+ * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx
-+ * @buf: the buffer to return
-+ * @state: vb2 buffer state passed to v4l2_m2m_buf_done().
-+ *
-+ * Buffers returned by this function will be returned to the user in the order
-+ * of the original jobs rather than the order in which this function is called.
-+ */
-+void v4l2_m2m_cap_buf_return(struct v4l2_m2m_dev *m2m_dev,
-+ struct v4l2_m2m_ctx *m2m_ctx,
-+ struct vb2_v4l2_buffer *buf,
-+ enum vb2_buffer_state state);
-+
-+/**
- * v4l2_m2m_reqbufs() - multi-queue-aware REQBUFS multiplexer
- *
- * @file: pointer to struct &file
---- a/include/media/videobuf2-v4l2.h
-+++ b/include/media/videobuf2-v4l2.h
-@@ -35,6 +35,8 @@
- * @request_fd: the request_fd associated with this buffer
- * @is_held: if true, then this capture buffer was held
- * @planes: plane information (userptr/fd, length, bytesused, data_offset).
-+ * @det_state: if a detached request capture buffer then this contains its
-+ * current state
- *
- * Should contain enough information to be able to cover all the fields
- * of &struct v4l2_buffer at ``videodev2.h``.
-@@ -49,6 +51,7 @@ struct vb2_v4l2_buffer {
- __s32 request_fd;
- bool is_held;
- struct vb2_plane planes[VB2_MAX_PLANES];
-+ enum vb2_buffer_state det_state;
- };
-
- /* VB2 V4L2 flags as set in vb2_queue.subsystem_flags */
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-23 02:58:44 +0000