diff options
| -rw-r--r-- | drivers/media/video/cx18/cx18-queue.c | 21 |
1 files changed, 18 insertions, 3 deletions
diff --git a/drivers/media/video/cx18/cx18-queue.c b/drivers/media/video/cx18/cx18-queue.c index 98cbf00..f2d539f 100644 --- a/drivers/media/video/cx18/cx18-queue.c +++ b/drivers/media/video/cx18/cx18-queue.c @@ -280,6 +280,7 @@ void cx18_load_queues(struct cx18_stream *s) struct cx18_buffer *buf; int mdl_id; int i; + u32 partial_buf_size; /* * Attach buffers to MDLs, give the MDLs ids, and add MDLs to q_free @@ -308,10 +309,24 @@ void cx18_load_queues(struct cx18_stream *s) &cx->scb->cpu_mdl[mdl_id + i].length); } - if (i == s->bufs_per_mdl) + if (i == s->bufs_per_mdl) { + /* + * The encoder doesn't honor s->mdl_size. So in the + * case of a non-integral number of buffers to meet + * mdl_size, we lie about the size of the last buffer + * in the MDL to get the encoder to really only send + * us mdl_size bytes per MDL transfer. + */ + partial_buf_size = s->mdl_size % s->buf_size; + if (partial_buf_size) { + cx18_writel(cx, partial_buf_size, + &cx->scb->cpu_mdl[mdl_id + i - 1].length); + } cx18_enqueue(s, mdl, &s->q_free); - else - cx18_push(s, mdl, &s->q_idle); /* not enough buffers */ + } else { + /* Not enough buffers for this MDL; we won't use it */ + cx18_push(s, mdl, &s->q_idle); + } mdl_id += i; } } |