Running v4l2-compliance on my usbtv stick revealed two failures:
1) Correct handling of CREATE_BUFS in usbtv_queue_setup was missing. Added this.
2) The sequence counter wasn't reset to 0 when starting streaming.
Signed-off-by: Hans Verkuil <hans.verk...@cisco.com>
Tested-by: Hans Verkuil <hans.verk...@cisco.com>
---
diff --git a/drivers/media/usb/usbtv/usbtv-video.c
b/drivers/media/usb/usbtv/usbtv-video.c
index 9d3525f..08fb0f2 100644
--- a/drivers/media/usb/usbtv/usbtv-video.c
+++ b/drivers/media/usb/usbtv/usbtv-video.c
@@ -599,15 +599,18 @@ static struct v4l2_file_operations usbtv_fops = {
};
static int usbtv_queue_setup(struct vb2_queue *vq,
- const struct v4l2_format *v4l_fmt, unsigned int *nbuffers,
+ const struct v4l2_format *fmt, unsigned int *nbuffers,
unsigned int *nplanes, unsigned int sizes[], void *alloc_ctxs[])
{
struct usbtv *usbtv = vb2_get_drv_priv(vq);
+ unsigned size = USBTV_CHUNK * usbtv->n_chunks * 2 * sizeof(u32);
- if (*nbuffers < 2)
- *nbuffers = 2;
+ if (vq->num_buffers + *nbuffers < 2)
+ *nbuffers = 2 - vq->num_buffers;
*nplanes = 1;
- sizes[0] = USBTV_CHUNK * usbtv->n_chunks * 2 * sizeof(u32);
+ if (fmt && fmt->fmt.pix.sizeimage < size)
+ return -EINVAL;
+ sizes[0] = fmt ? fmt->fmt.pix.sizeimage : size;
return 0;
}
@@ -635,6 +638,7 @@ static int usbtv_start_streaming(struct vb2_queue *vq,
unsigned int count)
if (usbtv->udev == NULL)
return -ENODEV;
+ usbtv->sequence = 0;
return usbtv_start(usbtv);
}
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