v4l2 driver patch

mjepg_bandwidth.patch

diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c
index 6a4b0b8..e5e63b2 100644
--- a/drivers/media/usb/uvc/uvc_driver.c
+++ b/drivers/media/usb/uvc/uvc_driver.c
@@ -36,6 +36,7 @@ unsigned int uvc_no_drop_param;
 static unsigned int uvc_quirks_param = -1;
 unsigned int uvc_trace_param;
 unsigned int uvc_timeout_param = UVC_CTRL_STREAMING_TIMEOUT;
+unsigned int uvc_jpeg_comp_param;
 
 /* ------------------------------------------------------------------------
  * Video formats
@@ -403,6 +404,10 @@ static int uvc_parse_format(struct uvc_device *dev,
 		format->fcc = V4L2_PIX_FMT_MJPEG;
 		format->flags = UVC_FMT_FLAG_COMPRESSED;
 		format->bpp = 0;
+               if ((uvc_jpeg_comp_param > 0) && ( 16 >= uvc_jpeg_comp_param))
+                       format->bpp = uvc_jpeg_comp_param;
+               else
+                       format->bpp = 4;
 		ftype = UVC_VS_FRAME_MJPEG;
 		break;
 
@@ -2097,6 +2102,8 @@ module_param_named(trace, uvc_trace_param, uint, S_IRUGO|S_IWUSR);
 MODULE_PARM_DESC(trace, "Trace level bitmask");
 module_param_named(timeout, uvc_timeout_param, uint, S_IRUGO|S_IWUSR);
 MODULE_PARM_DESC(timeout, "Streaming control requests timeout");
+module_param_named(jpg_compression, uvc_jpeg_comp_param, uint, S_IRUGO|S_IWUSR);
+MODULE_PARM_DESC(jpg_compression, "JPG compression ratio for bandwidth quirk");
 
 /* ------------------------------------------------------------------------
  * Driver initialization and cleanup
diff --git a/drivers/media/usb/uvc/uvc_video.c b/drivers/media/usb/uvc/uvc_video.c
index 9637e8b..2aabbc0 100644
--- a/drivers/media/usb/uvc/uvc_video.c
+++ b/drivers/media/usb/uvc/uvc_video.c
@@ -119,8 +119,10 @@ static void uvc_fixup_video_ctrl(struct uvc_streaming *stream,
 		ctrl->dwMaxVideoFrameSize =
 			frame->dwMaxVideoFrameBufferSize;
 
-	if (!(format->flags & UVC_FMT_FLAG_COMPRESSED) &&
-	    stream->dev->quirks & UVC_QUIRK_FIX_BANDWIDTH &&
+       if ((!(format->flags & UVC_FMT_FLAG_COMPRESSED) ||
+             (format->fcc == V4L2_PIX_FMT_MJPEG)) &&
+           (stream->dev->quirks & UVC_QUIRK_FIX_BANDWIDTH ||
+            stream->dev->quirks & UVC_QUIRK_FIX_JPEG_BANDWIDTH) &&
 	    stream->intf->num_altsetting > 1) {
 		u32 interval;
 		u32 bandwidth;
@@ -149,7 +151,8 @@ static void uvc_fixup_video_ctrl(struct uvc_streaming *stream,
 		 * resolutions working while not preventing two simultaneous
 		 * VGA streams at 15 fps.
 		 */
-		bandwidth = max_t(u32, bandwidth, 1024);
+               if(!(stream->dev->quirks & UVC_QUIRK_DISABLE_URB_1024))
+                       bandwidth = max_t(u32, bandwidth, 1024);
 
 		ctrl->dwMaxPayloadTransferSize = bandwidth;
 	}
diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h
index f0a04b5..f6faf08 100644
--- a/drivers/media/usb/uvc/uvcvideo.h
+++ b/drivers/media/usb/uvc/uvcvideo.h
@@ -150,6 +150,9 @@
 #define UVC_QUIRK_RESTORE_CTRLS_ON_INIT	0x00000400
 #define UVC_QUIRK_FORCE_Y8		0x00000800
 
+#define UVC_QUIRK_FIX_JPEG_BANDWIDTH   0x00000040
+#define UVC_QUIRK_DISABLE_URB_1024     0x00004000
+
 /* Format flags */
 #define UVC_FMT_FLAG_COMPRESSED		0x00000001
 #define UVC_FMT_FLAG_STREAM		0x00000002
 
 

@mkassner - the file should be renamed mjpeg_bandwidth.patch (instead of mjepg). Additionally the wiki page for the patch would also need to be updated.