[media] use v4l2_get_timestamp where possible

This is a preparation for a change to the type of v4l2 timestamps.
v4l2_get_timestamp() is a helper function that reads the monotonic
time and stores it into a 'struct timeval'. Multiple drivers implement
the same thing themselves for historic reasons.

Changing them all to use v4l2_get_timestamp() is more consistent
and reduces the amount of code duplication, and most importantly
simplifies the following changes.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
[hans.verkuil@cisco.com: dropped the v4l2-dev.c patch that didn't belong here]
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/media/pci/bt8xx/bttv-driver.c

@@ -3625,13 +3625,10 @@ static void
 bttv_irq_wakeup_vbi(struct bttv *btv, struct bttv_buffer *wakeup,
 		    unsigned int state)
 {
-	struct timeval ts;
-
 	if (NULL == wakeup)
 		return;
 
-	v4l2_get_timestamp(&ts);
+	v4l2_get_timestamp(&wakeup->vb.ts);
-	wakeup->vb.ts = ts;
 	wakeup->vb.field_count = btv->field_count;
 	wakeup->vb.state = state;
 	wake_up(&wakeup->vb.done);

drivers/media/pci/cx18/cx18-mailbox.c

@@ -202,7 +202,7 @@ static void cx18_mdl_send_to_videobuf(struct cx18_stream *s,
 	}
 
 	if (dispatch) {
-		vb_buf->vb.ts = ktime_to_timeval(ktime_get());
+		v4l2_get_timestamp(&vb_buf->vb.ts);
 		list_del(&vb_buf->vb.queue);
 		vb_buf->vb.state = VIDEOBUF_DONE;
 		wake_up(&vb_buf->vb.done);

drivers/media/platform/exynos4-is/fimc-lite.c

@@ -254,8 +254,6 @@ static irqreturn_t flite_irq_handler(int irq, void *priv)
 	struct fimc_lite *fimc = priv;
 	struct flite_buffer *vbuf;
 	unsigned long flags;
-	struct timeval *tv;
-	struct timespec ts;
 	u32 intsrc;
 
 	spin_lock_irqsave(&fimc->slock, flags);
@@ -294,10 +292,7 @@ static irqreturn_t flite_irq_handler(int irq, void *priv)
 	    test_bit(ST_FLITE_RUN, &fimc->state) &&
 	    !list_empty(&fimc->active_buf_q)) {
 		vbuf = fimc_lite_active_queue_pop(fimc);
-		ktime_get_ts(&ts);
+		v4l2_get_timestamp(&vbuf->vb.v4l2_buf.timestamp);
-		tv = &vbuf->vb.v4l2_buf.timestamp;
-		tv->tv_sec = ts.tv_sec;
-		tv->tv_usec = ts.tv_nsec / NSEC_PER_USEC;
 		vbuf->vb.v4l2_buf.sequence = fimc->frame_count++;
 		flite_hw_mask_dma_buffer(fimc, vbuf->index);
 		vb2_buffer_done(&vbuf->vb, VB2_BUF_STATE_DONE);

drivers/media/platform/omap3isp/ispstat.c

@@ -235,7 +235,7 @@ static int isp_stat_buf_queue(struct ispstat *stat)
 	if (!stat->active_buf)
 		return STAT_NO_BUF;
 
-	ktime_get_ts(&stat->active_buf->ts);
+	v4l2_get_timestamp(&stat->active_buf->ts);
 
 	stat->active_buf->buf_size = stat->buf_size;
 	if (isp_stat_buf_check_magic(stat, stat->active_buf)) {
@@ -496,8 +496,7 @@ int omap3isp_stat_request_statistics(struct ispstat *stat,
 		return PTR_ERR(buf);
 	}
 
-	data->ts.tv_sec = buf->ts.tv_sec;
+	data->ts = buf->ts;
-	data->ts.tv_usec = buf->ts.tv_nsec / NSEC_PER_USEC;
 	data->config_counter = buf->config_counter;
 	data->frame_number = buf->frame_number;
 	data->buf_size = buf->buf_size;

drivers/media/platform/omap3isp/ispstat.h

@@ -39,7 +39,7 @@ struct ispstat_buffer {
 	struct sg_table sgt;
 	void *virt_addr;
 	dma_addr_t dma_addr;
-	struct timespec ts;
+	struct timeval ts;
 	u32 buf_size;
 	u32 frame_number;
 	u16 config_counter;

drivers/media/platform/s3c-camif/camif-capture.c

@@ -328,23 +328,17 @@ irqreturn_t s3c_camif_irq_handler(int irq, void *priv)
 	    !list_empty(&vp->active_buf_q)) {
 		unsigned int index;
 		struct camif_buffer *vbuf;
-		struct timeval *tv;
-		struct timespec ts;
 		/*
 		 * Get previous DMA write buffer index:
 		 * 0 => DMA buffer 0, 2;
 		 * 1 => DMA buffer 1, 3.
 		 */
 		index = (CISTATUS_FRAMECNT(status) + 2) & 1;
-
-		ktime_get_ts(&ts);
 		vbuf = camif_active_queue_peek(vp, index);
 
 		if (!WARN_ON(vbuf == NULL)) {
 			/* Dequeue a filled buffer */
-			tv = &vbuf->vb.v4l2_buf.timestamp;
+			v4l2_get_timestamp(&vbuf->vb.v4l2_buf.timestamp);
-			tv->tv_sec = ts.tv_sec;
-			tv->tv_usec = ts.tv_nsec / NSEC_PER_USEC;
 			vbuf->vb.v4l2_buf.sequence = vp->frame_sequence++;
 			vb2_buffer_done(&vbuf->vb, VB2_BUF_STATE_DONE);
 

drivers/media/usb/gspca/gspca.c

@@ -436,7 +436,7 @@ void gspca_frame_add(struct gspca_dev *gspca_dev,
 		}
 		j = gspca_dev->fr_queue[i];
 		frame = &gspca_dev->frame[j];
-		frame->v4l2_buf.timestamp = ktime_to_timeval(ktime_get());
+		v4l2_get_timestamp(&frame->v4l2_buf.timestamp);
 		frame->v4l2_buf.sequence = gspca_dev->sequence++;
 		gspca_dev->image = frame->data;
 		gspca_dev->image_len = 0;
@@ -1909,7 +1909,7 @@ static ssize_t dev_read(struct file *file, char __user *data,
 	}
 
 	/* get a frame */
-	timestamp = ktime_to_timeval(ktime_get());
+	v4l2_get_timestamp(&timestamp);
 	timestamp.tv_sec--;
 	n = 2;
 	for (;;) {

drivers/staging/media/omap4iss/iss_video.c

@@ -420,7 +420,6 @@ struct iss_buffer *omap4iss_video_buffer_next(struct iss_video *video)
 	enum iss_pipeline_state state;
 	struct iss_buffer *buf;
 	unsigned long flags;
-	struct timespec ts;
 
 	spin_lock_irqsave(&video->qlock, flags);
 	if (WARN_ON(list_empty(&video->dmaqueue))) {
@@ -433,9 +432,7 @@ struct iss_buffer *omap4iss_video_buffer_next(struct iss_video *video)
 	list_del(&buf->list);
 	spin_unlock_irqrestore(&video->qlock, flags);
 
-	ktime_get_ts(&ts);
+	v4l2_get_timestamp(&buf->vb.v4l2_buf.timestamp);
-	buf->vb.v4l2_buf.timestamp.tv_sec = ts.tv_sec;
-	buf->vb.v4l2_buf.timestamp.tv_usec = ts.tv_nsec / NSEC_PER_USEC;
 
 	/* Do frame number propagation only if this is the output video node.
 	 * Frame number either comes from the CSI receivers or it gets