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Subject[PATCH v3 2/4] media: vicodec: use v4l2-mem2mem draining, stopped and next-buf-is-last states handling
Date
Use the previously introduced v4l2-mem2mem core APIs to handle the drainig,
stopped and next-buf-is-last states.

With these changes, the v4l2-compliance still passes with the following
commands :
# v4l2-ctl --stream-mmap --stream-out-mmap --stream-to-hdr out.comp --stream-from in.yuv
>>>><><><><><><><><><><><><><><><><>< 15.53 fps
15.53 fps
><><><><><><><><><><><><>< 13.99 fps
13.99 fps
><><><><><><><><><><><>< 13.52 fps
13.52 fps
><><><><><><><><><><><><>< 13.41 fps
13.41 fps
><><><><><><><><><><><><>< 13.21 fps
13.21 fps
><><><><><><><><><><><>< 13.09 fps
13.09 fps
><><><><><><><
STOP ENCODER
<<<
EOS EVENT

# v4l2-compliance --stream-from in.yuv -s
v4l2-compliance SHA: 7ead0e1856b89f2e19369af452bb03fd0cd16793, 64 bits
[...]
Total for vicodec device /dev/video0: 50, Succeeded: 50, Failed: 0, Warnings: 0

The full output is available at [1]

# v4l2-compliance -d1 --stream-from-hdr out.comp -s
v4l2-compliance SHA: 7ead0e1856b89f2e19369af452bb03fd0cd16793, 64 bits
[...]
Total for vicodec device /dev/video1: 50, Succeeded: 50, Failed: 0, Warnings: 0

The full output is available at [2]

No functional changes should be noticed.

[1] https://termbin.com/25nn
[2] https://termbin.com/dza4

Suggested-by: Hans Verkuil <hverkuil@xs4all.nl>
Suggested-by: Maxime Jourdan <mjourdan@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
---
drivers/media/platform/vicodec/vicodec-core.c | 154 +++++-------------
1 file changed, 44 insertions(+), 110 deletions(-)

diff --git a/drivers/media/platform/vicodec/vicodec-core.c b/drivers/media/platform/vicodec/vicodec-core.c
index 82350097503e..5606dbd7cf4d 100644
--- a/drivers/media/platform/vicodec/vicodec-core.c
+++ b/drivers/media/platform/vicodec/vicodec-core.c
@@ -117,15 +117,10 @@ struct vicodec_ctx {
struct vicodec_dev *dev;
bool is_enc;
bool is_stateless;
- bool is_draining;
- bool next_is_last;
- bool has_stopped;
spinlock_t *lock;

struct v4l2_ctrl_handler hdl;

- struct vb2_v4l2_buffer *last_src_buf;
-
/* Source and destination queue data */
struct vicodec_q_data q_data[2];
struct v4l2_fwht_state state;
@@ -431,11 +426,11 @@ static void device_run(void *priv)
v4l2_m2m_buf_copy_metadata(src_buf, dst_buf, false);

spin_lock(ctx->lock);
- if (!ctx->comp_has_next_frame && src_buf == ctx->last_src_buf) {
+ if (!ctx->comp_has_next_frame &&
+ v4l2_m2m_is_last_draining_src_buf(ctx->fh.m2m_ctx, src_buf)) {
dst_buf->flags |= V4L2_BUF_FLAG_LAST;
v4l2_event_queue_fh(&ctx->fh, &vicodec_eos_event);
- ctx->is_draining = false;
- ctx->has_stopped = true;
+ v4l2_m2m_mark_stopped(ctx->fh.m2m_ctx);
}
if (ctx->is_enc || ctx->is_stateless) {
src_buf->sequence = q_src->sequence++;
@@ -586,8 +581,6 @@ static int job_ready(void *priv)
unsigned int max_to_copy;
unsigned int comp_frame_size;

- if (ctx->has_stopped)
- return 0;
if (ctx->source_changed)
return 0;
if (ctx->is_stateless || ctx->is_enc || ctx->comp_has_frame)
@@ -607,7 +600,8 @@ static int job_ready(void *priv)
if (ctx->header_size < sizeof(struct fwht_cframe_hdr)) {
state = get_next_header(ctx, &p, p_src + sz - p);
if (ctx->header_size < sizeof(struct fwht_cframe_hdr)) {
- if (ctx->is_draining && src_buf == ctx->last_src_buf)
+ if (v4l2_m2m_is_last_draining_src_buf(ctx->fh.m2m_ctx,
+ src_buf))
return 1;
job_remove_src_buf(ctx, state);
goto restart;
@@ -636,7 +630,8 @@ static int job_ready(void *priv)
p += copy;
ctx->comp_size += copy;
if (ctx->comp_size < max_to_copy) {
- if (ctx->is_draining && src_buf == ctx->last_src_buf)
+ if (v4l2_m2m_is_last_draining_src_buf(ctx->fh.m2m_ctx,
+ src_buf))
return 1;
job_remove_src_buf(ctx, state);
goto restart;
@@ -1219,41 +1214,6 @@ static int vidioc_s_selection(struct file *file, void *priv,
return 0;
}

-static int vicodec_mark_last_buf(struct vicodec_ctx *ctx)
-{
- struct vb2_v4l2_buffer *next_dst_buf;
- int ret = 0;
-
- spin_lock(ctx->lock);
- if (ctx->is_draining) {
- ret = -EBUSY;
- goto unlock;
- }
- if (ctx->has_stopped)
- goto unlock;
-
- ctx->last_src_buf = v4l2_m2m_last_src_buf(ctx->fh.m2m_ctx);
- ctx->is_draining = true;
- if (ctx->last_src_buf)
- goto unlock;
-
- next_dst_buf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
- if (!next_dst_buf) {
- ctx->next_is_last = true;
- goto unlock;
- }
-
- next_dst_buf->flags |= V4L2_BUF_FLAG_LAST;
- vb2_buffer_done(&next_dst_buf->vb2_buf, VB2_BUF_STATE_DONE);
- ctx->is_draining = false;
- ctx->has_stopped = true;
- v4l2_event_queue_fh(&ctx->fh, &vicodec_eos_event);
-
-unlock:
- spin_unlock(ctx->lock);
- return ret;
-}
-
static int vicodec_encoder_cmd(struct file *file, void *fh,
struct v4l2_encoder_cmd *ec)
{
@@ -1268,18 +1228,15 @@ static int vicodec_encoder_cmd(struct file *file, void *fh,
!vb2_is_streaming(&ctx->fh.m2m_ctx->out_q_ctx.q))
return 0;

- if (ec->cmd == V4L2_ENC_CMD_STOP)
- return vicodec_mark_last_buf(ctx);
- ret = 0;
- spin_lock(ctx->lock);
- if (ctx->is_draining) {
- ret = -EBUSY;
- } else if (ctx->has_stopped) {
- ctx->has_stopped = false;
+ ret = v4l2_m2m_ioctl_encoder_cmd(file, fh, ec);
+ if (ret < 0)
+ return ret;
+
+ if (ec->cmd == V4L2_ENC_CMD_START &&
+ v4l2_m2m_has_stopped(ctx->fh.m2m_ctx))
vb2_clear_last_buffer_dequeued(&ctx->fh.m2m_ctx->cap_q_ctx.q);
- }
- spin_unlock(ctx->lock);
- return ret;
+
+ return 0;
}

static int vicodec_decoder_cmd(struct file *file, void *fh,
@@ -1296,18 +1253,15 @@ static int vicodec_decoder_cmd(struct file *file, void *fh,
!vb2_is_streaming(&ctx->fh.m2m_ctx->out_q_ctx.q))
return 0;

- if (dc->cmd == V4L2_DEC_CMD_STOP)
- return vicodec_mark_last_buf(ctx);
- ret = 0;
- spin_lock(ctx->lock);
- if (ctx->is_draining) {
- ret = -EBUSY;
- } else if (ctx->has_stopped) {
- ctx->has_stopped = false;
+ ret = v4l2_m2m_ioctl_decoder_cmd(file, fh, dc);
+ if (ret < 0)
+ return ret;
+
+ if (dc->cmd == V4L2_DEC_CMD_START &&
+ v4l2_m2m_has_stopped(ctx->fh.m2m_ctx))
vb2_clear_last_buffer_dequeued(&ctx->fh.m2m_ctx->cap_q_ctx.q);
- }
- spin_unlock(ctx->lock);
- return ret;
+
+ return 0;
}

static int vicodec_enum_framesizes(struct file *file, void *fh,
@@ -1480,23 +1434,21 @@ static void vicodec_buf_queue(struct vb2_buffer *vb)
.u.src_change.changes = V4L2_EVENT_SRC_CH_RESOLUTION,
};

- if (vb2_is_streaming(vq_cap)) {
- if (!V4L2_TYPE_IS_OUTPUT(vb->vb2_queue->type) &&
- ctx->next_is_last) {
- unsigned int i;
+ if (!V4L2_TYPE_IS_OUTPUT(vb->vb2_queue->type) &&
+ vb2_is_streaming(vb->vb2_queue) &&
+ v4l2_m2m_dst_buf_is_last(ctx->fh.m2m_ctx)) {
+ unsigned int i;

- for (i = 0; i < vb->num_planes; i++)
- vb->planes[i].bytesused = 0;
- vbuf->flags = V4L2_BUF_FLAG_LAST;
- vbuf->field = V4L2_FIELD_NONE;
- vbuf->sequence = get_q_data(ctx, vb->vb2_queue->type)->sequence++;
- vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
- ctx->is_draining = false;
- ctx->has_stopped = true;
- ctx->next_is_last = false;
- v4l2_event_queue_fh(&ctx->fh, &vicodec_eos_event);
- return;
- }
+ for (i = 0; i < vb->num_planes; i++)
+ vb->planes[i].bytesused = 0;
+
+ vbuf->field = V4L2_FIELD_NONE;
+ vbuf->sequence =
+ get_q_data(ctx, vb->vb2_queue->type)->sequence++;
+
+ v4l2_m2m_last_buffer_done(ctx->fh.m2m_ctx, vbuf);
+ v4l2_event_queue_fh(&ctx->fh, &vicodec_eos_event);
+ return;
}

/* buf_queue handles only the first source change event */
@@ -1609,8 +1561,7 @@ static int vicodec_start_streaming(struct vb2_queue *q,
chroma_div = info->width_div * info->height_div;
q_data->sequence = 0;

- if (V4L2_TYPE_IS_OUTPUT(q->type))
- ctx->last_src_buf = NULL;
+ v4l2_m2m_start_streaming(ctx->fh.m2m_ctx, q);

state->gop_cnt = 0;

@@ -1689,29 +1640,12 @@ static void vicodec_stop_streaming(struct vb2_queue *q)

vicodec_return_bufs(q, VB2_BUF_STATE_ERROR);

- if (V4L2_TYPE_IS_OUTPUT(q->type)) {
- if (ctx->is_draining) {
- struct vb2_v4l2_buffer *next_dst_buf;
-
- spin_lock(ctx->lock);
- ctx->last_src_buf = NULL;
- next_dst_buf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
- if (!next_dst_buf) {
- ctx->next_is_last = true;
- } else {
- next_dst_buf->flags |= V4L2_BUF_FLAG_LAST;
- vb2_buffer_done(&next_dst_buf->vb2_buf, VB2_BUF_STATE_DONE);
- ctx->is_draining = false;
- ctx->has_stopped = true;
- v4l2_event_queue_fh(&ctx->fh, &vicodec_eos_event);
- }
- spin_unlock(ctx->lock);
- }
- } else {
- ctx->is_draining = false;
- ctx->has_stopped = false;
- ctx->next_is_last = false;
- }
+ v4l2_m2m_stop_streaming(ctx->fh.m2m_ctx, q);
+
+ if (V4L2_TYPE_IS_OUTPUT(q->type) &&
+ v4l2_m2m_has_stopped(ctx->fh.m2m_ctx))
+ v4l2_event_queue_fh(&ctx->fh, &vicodec_eos_event);
+
if (!ctx->is_enc && V4L2_TYPE_IS_OUTPUT(q->type))
ctx->first_source_change_sent = false;

--
2.22.0
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