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[media] coda: don't start streaming without queued buffers

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We could support start streaming with an empty output queue for the
BIT decoders due to the bitstream buffer which could still contain
data at this point, but there is really no reason for userspace to
expect this to work. Simplify the code by disallowing it.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Kamil Debski <k.debski@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Philipp Zabel 2015-12-02 14:58:53 -02:00 committed by Mauro Carvalho Chehab
parent bb757d7bd3
commit 49b966fa45
1 changed files with 3 additions and 10 deletions
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13
drivers/media/platform/coda/coda-common.c
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@ -1252,6 +1252,9 @@ static int coda_start_streaming(struct vb2_queue *q, unsigned int count)
struct vb2_v4l2_buffer *buf;
int ret = 0;
if (count < 1)
return -EINVAL;
q_data_src = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);
if (q->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
if (ctx->inst_type == CODA_INST_DECODER && ctx->use_bit) {
@ -1264,20 +1267,10 @@ static int coda_start_streaming(struct vb2_queue *q, unsigned int count)
ret = -EINVAL;
goto err;
}
} else {
if (count < 1) {
ret = -EINVAL;
goto err;
}
}
ctx->streamon_out = 1;
} else {
if (count < 1) {
ret = -EINVAL;
goto err;
}
ctx->streamon_cap = 1;
}