diff options
Diffstat (limited to 'drivers/media/pci/bt8xx/bttv-driver.c')
| -rw-r--r-- | drivers/media/pci/bt8xx/bttv-driver.c | 29 |
1 files changed, 24 insertions, 5 deletions
diff --git a/drivers/media/pci/bt8xx/bttv-driver.c b/drivers/media/pci/bt8xx/bttv-driver.c index 09a193bb87df..511f013cc338 100644 --- a/drivers/media/pci/bt8xx/bttv-driver.c +++ b/drivers/media/pci/bt8xx/bttv-driver.c @@ -1536,13 +1536,11 @@ static void buf_cleanup(struct vb2_buffer *vb) static int start_streaming(struct vb2_queue *q, unsigned int count) { - int ret = 1; int seqnr = 0; struct bttv_buffer *buf; struct bttv *btv = vb2_get_drv_priv(q); - ret = check_alloc_btres_lock(btv, RESOURCE_VIDEO_STREAM); - if (ret == 0) { + if (!check_alloc_btres_lock(btv, RESOURCE_VIDEO_STREAM)) { if (btv->field_count) seqnr++; while (!list_empty(&btv->capture)) { @@ -1553,7 +1551,7 @@ static int start_streaming(struct vb2_queue *q, unsigned int count) vb2_buffer_done(&buf->vbuf.vb2_buf, VB2_BUF_STATE_QUEUED); } - return !ret; + return -EBUSY; } if (!vb2_is_streaming(&btv->vbiq)) { init_irqreg(btv); @@ -2774,6 +2772,27 @@ bttv_irq_wakeup_vbi(struct bttv *btv, struct bttv_buffer *wakeup, return; wakeup->vbuf.vb2_buf.timestamp = ktime_get_ns(); wakeup->vbuf.sequence = btv->field_count >> 1; + + /* + * Ugly hack for backwards compatibility. + * Some applications expect that the last 4 bytes of + * the VBI data contains the sequence number. + * + * This makes it possible to associate the VBI data + * with the video frame if you use read() to get the + * VBI data. + */ + if (vb2_fileio_is_active(wakeup->vbuf.vb2_buf.vb2_queue)) { + u32 *vaddr = vb2_plane_vaddr(&wakeup->vbuf.vb2_buf, 0); + unsigned long size = + vb2_get_plane_payload(&wakeup->vbuf.vb2_buf, 0) / 4; + + if (vaddr && size) { + vaddr += size - 1; + *vaddr = wakeup->vbuf.sequence; + } + } + vb2_buffer_done(&wakeup->vbuf.vb2_buf, state); if (btv->field_count == 0) btor(BT848_INT_VSYNC, BT848_INT_MASK); @@ -3094,7 +3113,7 @@ static int vdev_init(struct bttv *btv, struct video_device *vfd, q->gfp_flags = __GFP_DMA32; q->buf_struct_size = sizeof(struct bttv_buffer); q->lock = &btv->lock; - q->min_buffers_needed = 2; + q->min_queued_buffers = 2; q->dev = &btv->c.pci->dev; err = vb2_queue_init(q); if (err) |