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[media] V4L: mx3_camera: implement .stop_streaming() 

The .stop_streaming() videobuf2 operation has to be implemented to
guarantee, that video buffers are not written to after a STREAMOFF.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Guennadi Liakhovetski 2011-03-25 05:24:01 -03:00 committed by Mauro Carvalho Chehab
parent 066f786720
commit 08a31b9605
1 changed files with 30 additions and 0 deletions
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30
drivers/media/video/mx3_camera.c
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@ -400,6 +400,35 @@ static int mx3_videobuf_init(struct vb2_buffer *vb)
return 0;
}
static int mx3_stop_streaming(struct vb2_queue *q)
{
struct soc_camera_device *icd = soc_camera_from_vb2q(q);
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
struct mx3_camera_dev *mx3_cam = ici->priv;
struct idmac_channel *ichan = mx3_cam->idmac_channel[0];
struct dma_chan *chan;
struct mx3_camera_buffer *buf, *tmp;
unsigned long flags;
if (ichan) {
chan = &ichan->dma_chan;
chan->device->device_control(chan, DMA_TERMINATE_ALL, 0);
}
spin_lock_irqsave(&mx3_cam->lock, flags);
mx3_cam->active = NULL;
list_for_each_entry_safe(buf, tmp, &mx3_cam->capture, queue) {
buf->state = CSI_BUF_NEEDS_INIT;
list_del_init(&buf->queue);
}
spin_unlock_irqrestore(&mx3_cam->lock, flags);
return 0;
}
static struct vb2_ops mx3_videobuf_ops = {
.queue_setup = mx3_videobuf_setup,
.buf_prepare = mx3_videobuf_prepare,
@ -408,6 +437,7 @@ static struct vb2_ops mx3_videobuf_ops = {
.buf_init = mx3_videobuf_init,
.wait_prepare = soc_camera_unlock,
.wait_finish = soc_camera_lock,
.stop_streaming = mx3_stop_streaming,
};
static int mx3_camera_init_videobuf(struct vb2_queue *q,