iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

usb: gadget: uvc: Switch to monotonic clock for buffer timestamps

Browse Source 
The wall time clock isn't useful for applications as it can jump around
due to time adjustement. Switch to the monotonic clock.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Laurent Pinchart 2014-03-23 16:25:09 +01:00 committed by Felipe Balbi
parent 79cb5b533a
commit 16bf900f50
1 changed files with 2 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
drivers/usb/gadget/uvc_queue.c
View File

@ -20,6 +20,7 @@
#include <linux/vmalloc.h> #include <linux/vmalloc.h>
#include <linux/wait.h> #include <linux/wait.h>
#include <media/v4l2-common.h>
#include <media/videobuf2-vmalloc.h> #include <media/videobuf2-vmalloc.h>
#include "uvc.h" #include "uvc.h"
@ -379,14 +380,8 @@ static struct uvc_buffer *uvc_queue_next_buffer(struct uvc_video_queue *queue,
else else
nextbuf = NULL; nextbuf = NULL;
/*
* FIXME: with videobuf2, the sequence number or timestamp fields
* are valid only for video capture devices and the UVC gadget usually
* is a video output device. Keeping these until the specs are clear on
* this aspect.
*/
buf->buf.v4l2_buf.sequence = queue->sequence++; buf->buf.v4l2_buf.sequence = queue->sequence++;
do_gettimeofday(&buf->buf.v4l2_buf.timestamp); v4l2_get_timestamp(&buf->buf.v4l2_buf.timestamp);
vb2_set_plane_payload(&buf->buf, 0, buf->bytesused); vb2_set_plane_payload(&buf->buf, 0, buf->bytesused);
vb2_buffer_done(&buf->buf, VB2_BUF_STATE_DONE); vb2_buffer_done(&buf->buf, VB2_BUF_STATE_DONE);