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media: venus: reimplement decoder stop command

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This addresses the wrong behavior of decoder stop command by
rewriting it. These new implementation enqueue an empty buffer
on the decoder input buffer queue to signal end-of-stream. The
client should stop queuing buffers on the V4L2 Output queue
and continue queuing/dequeuing buffers on Capture queue. This
process will continue until the client receives a buffer with
V4L2_BUF_FLAG_LAST flag raised, which means that this is last
decoded buffer with data.

Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
Tested-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Cc: <stable@vger.kernel.org>      # for v4.13 and up
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Stanimir Varbanov 2017-10-13 16:13:17 +02:00 committed by Mauro Carvalho Chehab
parent 3863360c15
commit e69b987a97
4 changed files with 25 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/media/platform/qcom/venus/core.h
View File

@ -194,7 +194,6 @@ struct venus_buffer {
* @fh: a holder of v4l file handle structure
* @streamon_cap: stream on flag for capture queue
* @streamon_out: stream on flag for output queue
* @cmd_stop: a flag to signal encoder/decoder commands
* @width: current capture width
* @height: current capture height
* @out_width: current output width
@ -258,7 +257,6 @@ struct venus_inst {
} controls;
struct v4l2_fh fh;
unsigned int streamon_cap, streamon_out;
bool cmd_stop;
u32 width;
u32 height;
u32 out_width;

7
drivers/media/platform/qcom/venus/helpers.c
View File

@ -623,13 +623,6 @@ void venus_helper_vb2_buf_queue(struct vb2_buffer *vb)
mutex_lock(&inst->lock);
if (inst->cmd_stop) {
vbuf->flags |= V4L2_BUF_FLAG_LAST;
v4l2_m2m_buf_done(vbuf, VB2_BUF_STATE_DONE);
inst->cmd_stop = false;
goto unlock;
}
v4l2_m2m_buf_queue(m2m_ctx, vbuf);
if (!(inst->streamon_out & inst->streamon_cap))

1
drivers/media/platform/qcom/venus/hfi.c
View File

@ -484,6 +484,7 @@ int hfi_session_process_buf(struct venus_inst *inst, struct hfi_frame_data *fd)
return -EINVAL;
}
EXPORT_SYMBOL_GPL(hfi_session_process_buf);
irqreturn_t hfi_isr_thread(int irq, void *dev_id)
{

36
drivers/media/platform/qcom/venus/vdec.c
View File

@ -469,8 +469,14 @@ static int vdec_subscribe_event(struct v4l2_fh *fh,
static int
vdec_try_decoder_cmd(struct file *file, void *fh, struct v4l2_decoder_cmd *cmd)
{
if (cmd->cmd != V4L2_DEC_CMD_STOP)
switch (cmd->cmd) {
case V4L2_DEC_CMD_STOP:
if (cmd->flags & V4L2_DEC_CMD_STOP_TO_BLACK)
return -EINVAL;
break;
default:
return -EINVAL;
}
return 0;
}
@ -479,6 +485,7 @@ static int
vdec_decoder_cmd(struct file *file, void *fh, struct v4l2_decoder_cmd *cmd)
{
struct venus_inst *inst = to_inst(file);
struct hfi_frame_data fdata = {0};
int ret;
ret = vdec_try_decoder_cmd(file, fh, cmd);
@ -486,12 +493,23 @@ vdec_decoder_cmd(struct file *file, void *fh, struct v4l2_decoder_cmd *cmd)
return ret;
mutex_lock(&inst->lock);
inst->cmd_stop = true;
/*
* Implement V4L2_DEC_CMD_STOP by enqueue an empty buffer on decoder
* input to signal EOS.
*/
if (!(inst->streamon_out & inst->streamon_cap))
goto unlock;
fdata.buffer_type = HFI_BUFFER_INPUT;
fdata.flags |= HFI_BUFFERFLAG_EOS;
fdata.device_addr = 0xdeadbeef;
ret = hfi_session_process_buf(inst, &fdata);
unlock:
mutex_unlock(&inst->lock);
hfi_session_flush(inst);
return 0;
return ret;
}
static const struct v4l2_ioctl_ops vdec_ioctl_ops = {
@ -718,7 +736,6 @@ static int vdec_start_streaming(struct vb2_queue *q, unsigned int count)
inst->reconfig = false;
inst->sequence_cap = 0;
inst->sequence_out = 0;
inst->cmd_stop = false;
ret = vdec_init_session(inst);
if (ret)
@ -807,11 +824,6 @@ static void vdec_buf_done(struct venus_inst *inst, unsigned int buf_type,
vb->timestamp = timestamp_us * NSEC_PER_USEC;
vbuf->sequence = inst->sequence_cap++;
if (inst->cmd_stop) {
vbuf->flags |= V4L2_BUF_FLAG_LAST;
inst->cmd_stop = false;
}
if (vbuf->flags & V4L2_BUF_FLAG_LAST) {
const struct v4l2_event ev = { .type = V4L2_EVENT_EOS };