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path: root/drivers/media/video/uvc/uvc_video.c
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Diffstat (limited to 'drivers/media/video/uvc/uvc_video.c')
-rw-r--r--drivers/media/video/uvc/uvc_video.c26
1 files changed, 18 insertions, 8 deletions
diff --git a/drivers/media/video/uvc/uvc_video.c b/drivers/media/video/uvc/uvc_video.c
index a6e41d12b22..05139a4f14f 100644
--- a/drivers/media/video/uvc/uvc_video.c
+++ b/drivers/media/video/uvc/uvc_video.c
@@ -135,7 +135,7 @@ static int uvc_get_video_ctrl(struct uvc_streaming *stream,
ret = __uvc_query_ctrl(stream->dev, query, 0, stream->intfnum,
probe ? UVC_VS_PROBE_CONTROL : UVC_VS_COMMIT_CONTROL, data,
- size, UVC_CTRL_STREAMING_TIMEOUT);
+ size, uvc_timeout_param);
if ((query == UVC_GET_MIN || query == UVC_GET_MAX) && ret == 2) {
/* Some cameras, mostly based on Bison Electronics chipsets,
@@ -239,7 +239,7 @@ static int uvc_set_video_ctrl(struct uvc_streaming *stream,
ret = __uvc_query_ctrl(stream->dev, UVC_SET_CUR, 0, stream->intfnum,
probe ? UVC_VS_PROBE_CONTROL : UVC_VS_COMMIT_CONTROL, data,
- size, UVC_CTRL_STREAMING_TIMEOUT);
+ size, uvc_timeout_param);
if (ret != size) {
uvc_printk(KERN_ERR, "Failed to set UVC %s control : "
"%d (exp. %u).\n", probe ? "probe" : "commit",
@@ -770,8 +770,9 @@ static int uvc_alloc_urb_buffers(struct uvc_streaming *stream,
/* Retry allocations until one succeed. */
for (; npackets > 1; npackets /= 2) {
for (i = 0; i < UVC_URBS; ++i) {
+ stream->urb_size = psize * npackets;
stream->urb_buffer[i] = usb_buffer_alloc(
- stream->dev->udev, psize * npackets,
+ stream->dev->udev, stream->urb_size,
gfp_flags | __GFP_NOWARN, &stream->urb_dma[i]);
if (!stream->urb_buffer[i]) {
uvc_free_urb_buffers(stream);
@@ -780,11 +781,15 @@ static int uvc_alloc_urb_buffers(struct uvc_streaming *stream,
}
if (i == UVC_URBS) {
- stream->urb_size = psize * npackets;
+ uvc_trace(UVC_TRACE_VIDEO, "Allocated %u URB buffers "
+ "of %ux%u bytes each.\n", UVC_URBS, npackets,
+ psize);
return npackets;
}
}
+ uvc_trace(UVC_TRACE_VIDEO, "Failed to allocate URB buffers (%u bytes "
+ "per packet).\n", psize);
return 0;
}
@@ -935,10 +940,12 @@ static int uvc_init_video(struct uvc_streaming *stream, gfp_t gfp_flags)
bandwidth = stream->ctrl.dwMaxPayloadTransferSize;
if (bandwidth == 0) {
- uvc_printk(KERN_WARNING, "device %s requested null "
- "bandwidth, defaulting to lowest.\n",
- stream->dev->name);
+ uvc_trace(UVC_TRACE_VIDEO, "Device requested null "
+ "bandwidth, defaulting to lowest.\n");
bandwidth = 1;
+ } else {
+ uvc_trace(UVC_TRACE_VIDEO, "Device requested %u "
+ "B/frame bandwidth.\n", bandwidth);
}
for (i = 0; i < intf->num_altsetting; ++i) {
@@ -955,8 +962,11 @@ static int uvc_init_video(struct uvc_streaming *stream, gfp_t gfp_flags)
break;
}
- if (i >= intf->num_altsetting)
+ if (i >= intf->num_altsetting) {
+ uvc_trace(UVC_TRACE_VIDEO, "No fast enough alt setting "
+ "for requested bandwidth.\n");
return -EIO;
+ }
ret = usb_set_interface(stream->dev->udev, intfnum, i);
if (ret < 0)