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media: coda: implement CMD_START to restart decoding

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The CMD_START shall be used to start the processing after a drain that
was initiated with CMD_STOP.

Up until now, a drain on coda could only be finished with a
STREAMOFF-STREAMON, which resulted in a reset of the device.

Signed-off-by: Michael Tretter <m.tretter@pengutronix.de>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Michael Tretter 2019-06-18 12:45:08 -04:00 committed by Mauro Carvalho Chehab
parent 932952e525
commit 60c74167fe
1 changed files with 17 additions and 4 deletions
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21
drivers/media/platform/coda/coda-common.c
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@ -1059,16 +1059,29 @@ static int coda_decoder_cmd(struct file *file, void *fh,
struct v4l2_decoder_cmd *dc)
{
struct coda_ctx *ctx = fh_to_ctx(fh);
struct vb2_queue *dst_vq;
int ret;
ret = coda_try_decoder_cmd(file, fh, dc);
if (ret < 0)
return ret;
/* Set the stream-end flag on this context */
coda_bit_stream_end_flag(ctx);
ctx->hold = false;
v4l2_m2m_try_schedule(ctx->fh.m2m_ctx);
switch (dc->cmd) {
case V4L2_DEC_CMD_START:
dst_vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx,
V4L2_BUF_TYPE_VIDEO_CAPTURE);
vb2_clear_last_buffer_dequeued(dst_vq);
ctx->bit_stream_param &= ~CODA_BIT_STREAM_END_FLAG;
break;
case V4L2_DEC_CMD_STOP:
/* Set the stream-end flag on this context */
coda_bit_stream_end_flag(ctx);
ctx->hold = false;
v4l2_m2m_try_schedule(ctx->fh.m2m_ctx);
break;
default:
return -EINVAL;
}
return 0;
}