[PATCH v1] [media] uvcvideo: mark buffer error where overflow

From	Baoyou Xie <baoyou.xie@linaro.org>
Newsgroups	linux.kernel
Subject	[PATCH v1] [media] uvcvideo: mark buffer error where overflow
Date	2017-09-07 05:10 +0200
Message-ID	<umVmx-2sp-9@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

Show all headers | View raw

Some cameras post inaccurate frame where next frame data overlap
it. this results in screen flicker, and it need to be prevented.

So this patch marks the buffer error to discard the frame where
buffer overflow.

Signed-off-by: Baoyou Xie <baoyou.xie@linaro.org>
---
 drivers/media/usb/uvc/uvc_video.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/media/usb/uvc/uvc_video.c b/drivers/media/usb/uvc/uvc_video.c
index fb86d6a..81a3530 100644
--- a/drivers/media/usb/uvc/uvc_video.c
+++ b/drivers/media/usb/uvc/uvc_video.c
@@ -1077,6 +1077,7 @@ static void uvc_video_decode_data(struct uvc_streaming *stream,
 	/* Complete the current frame if the buffer size was exceeded. */
 	if (len > maxlen) {
 		uvc_trace(UVC_TRACE_FRAME, "Frame complete (overflow).\n");
+		buf->error = 1;
 		buf->state = UVC_BUF_STATE_READY;
 	}
 }
-- 
2.7.4

Back to linux.kernel | Previous | Next | Find similar | Unroll thread

Thread

[PATCH v1] [media] uvcvideo: mark buffer error where overflow Baoyou Xie <baoyou.xie@linaro.org> - 2017-09-07 05:10 +0200

csiph-web