Hi Sven,
On Thursday 22 October 2009 12:13:55 Sven Geggus wrote:
> Hello,
>
> starting from recent Kernels my ViMicro Webcam stopped working correctly im
> mjpeg mode.
>
> Looking at the driver sources I came across the UVC_QUIRK_FIX_BANDWIDTH
> which has been activated for this camera:
>
> Bus 002 Device 005: ID 0ac8:3420 Z-Star Microelectronics Corp.
>
> Unfortunately this sems to do more harm than good. I made mjpeg mode work
> fine again by removing the quirks altogether (see attached patch).
Could you please try the following patch ? It disables the quirk for
compressed formats.
diff -r e0354cf2734b linux/drivers/media/video/uvc/uvc_video.c
--- a/linux/drivers/media/video/uvc/uvc_video.c Wed Oct 21 23:36:18 2009 +0200
+++ b/linux/drivers/media/video/uvc/uvc_video.c Wed Oct 28 13:42:24 2009 +0100
@@ -90,7 +90,8 @@
ctrl->dwMaxVideoFrameSize =
frame->dwMaxVideoFrameBufferSize;
- if (stream->dev->quirks & UVC_QUIRK_FIX_BANDWIDTH &&
+ if (!(format->flags & UVC_FMT_FLAG_COMPRESSED) &&
+ stream->dev->quirks & UVC_QUIRK_FIX_BANDWIDTH &&
stream->intf->num_altsetting > 1) {
u32 interval;
u32 bandwidth;
--
Regards,
Laurent Pinchart
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