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authorLaurent Pinchart <laurent.pinchart@ideasonboard.com>2012-08-28 23:38:58 +0200
committerLaurent Pinchart <laurent.pinchart@ideasonboard.com>2012-10-20 22:14:15 +0200
commitf2d22847215a636e6e60fb1b1edd3051c2b984d3 (patch)
tree93fea869e55c9b9adcd181e30f1a8d6fea5767f3
parent02207ada5ca3048b1a62c4fdff4aaa58fa40a793 (diff)
uvcvideo: Don't fail when an unsupported format is requested
Return the default format in that case. This issue was found by the v4l2-compliance tool. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
-rw-r--r--drivers/media/usb/uvc/uvc_v4l2.c11
-rw-r--r--drivers/media/usb/uvc/uvc_video.c1
-rw-r--r--drivers/media/usb/uvc/uvcvideo.h1
3 files changed, 8 insertions, 5 deletions
diff --git a/drivers/media/usb/uvc/uvc_v4l2.c b/drivers/media/usb/uvc/uvc_v4l2.c
index e5817b953938..3bd93736a82a 100644
--- a/drivers/media/usb/uvc/uvc_v4l2.c
+++ b/drivers/media/usb/uvc/uvc_v4l2.c
@@ -165,17 +165,18 @@ static int uvc_v4l2_try_format(struct uvc_streaming *stream,
fcc[0], fcc[1], fcc[2], fcc[3],
fmt->fmt.pix.width, fmt->fmt.pix.height);
- /* Check if the hardware supports the requested format. */
+ /* Check if the hardware supports the requested format, use the default
+ * format otherwise.
+ */
for (i = 0; i < stream->nformats; ++i) {
format = &stream->format[i];
if (format->fcc == fmt->fmt.pix.pixelformat)
break;
}
- if (format == NULL || format->fcc != fmt->fmt.pix.pixelformat) {
- uvc_trace(UVC_TRACE_FORMAT, "Unsupported format 0x%08x.\n",
- fmt->fmt.pix.pixelformat);
- return -EINVAL;
+ if (i == stream->nformats) {
+ format = stream->def_format;
+ fmt->fmt.pix.pixelformat = format->fcc;
}
/* Find the closest image size. The distance between image sizes is
diff --git a/drivers/media/usb/uvc/uvc_video.c b/drivers/media/usb/uvc/uvc_video.c
index 57c3076a4625..3394c3432011 100644
--- a/drivers/media/usb/uvc/uvc_video.c
+++ b/drivers/media/usb/uvc/uvc_video.c
@@ -1812,6 +1812,7 @@ int uvc_video_init(struct uvc_streaming *stream)
probe->bFormatIndex = format->index;
probe->bFrameIndex = frame->bFrameIndex;
+ stream->def_format = format;
stream->cur_format = format;
stream->cur_frame = frame;
diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h
index af216ec45e39..d83b6baf703a 100644
--- a/drivers/media/usb/uvc/uvcvideo.h
+++ b/drivers/media/usb/uvc/uvcvideo.h
@@ -436,6 +436,7 @@ struct uvc_streaming {
struct uvc_format *format;
struct uvc_streaming_control ctrl;
+ struct uvc_format *def_format;
struct uvc_format *cur_format;
struct uvc_frame *cur_frame;
/* Protect access to ctrl, cur_format, cur_frame and hardware video

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