media: vivid: fix timestamp and sequence wrapping

The error injection controls that test wrap-around sequence and timestamp
counters were partially broken. Add a menu option for 64 or 32 bit signed
timestamp wrapping. Prevent the timestamp from wrapping around before the
device can be tested.  Remove the sequence count from the timestamp
calculation so that sequence wrapping does not interfere with the
timestamp.  Add consistent time and sequence wrapping to sdr and touch
devices.
Signed-off-by: Deborah Brouwer <deborahbrouwer3563@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/media/test-drivers/vivid/vivid-core.h

@@ -307,7 +307,7 @@ struct vivid_dev {
 	bool				dqbuf_error;
 	bool				req_validate_error;
 	bool				seq_wrap;
-	bool				time_wrap;
+	u64				time_wrap;
 	u64				time_wrap_offset;
 	unsigned			perc_dropped_buffers;
 	enum vivid_signal_mode		std_signal_mode[MAX_INPUTS];
@@ -437,6 +437,7 @@ struct vivid_dev {
 	bool				touch_cap_seq_resync;
 	u32				touch_cap_seq_start;
 	u32				touch_cap_seq_count;
+	u32				touch_cap_with_seq_wrap_count;
 	bool				touch_cap_streaming;
 	struct v4l2_fract		timeperframe_tch_cap;
 	struct v4l2_pix_format		tch_format;
@@ -524,7 +525,9 @@ struct vivid_dev {
 	struct task_struct		*kthread_sdr_cap;
 	unsigned long			jiffies_sdr_cap;
 	u32				sdr_cap_seq_offset;
+	u32				sdr_cap_seq_start;
 	u32				sdr_cap_seq_count;
+	u32				sdr_cap_with_seq_wrap_count;
 	bool				sdr_cap_seq_resync;
 
 	/* RDS generator */

drivers/media/test-drivers/vivid/vivid-ctrls.c

@@ -1084,7 +1084,6 @@ static const struct v4l2_ctrl_config vivid_ctrl_display_present = {
 static int vivid_streaming_s_ctrl(struct v4l2_ctrl *ctrl)
 {
 	struct vivid_dev *dev = container_of(ctrl->handler, struct vivid_dev, ctrl_hdl_streaming);
-	u64 rem;
 
 	switch (ctrl->id) {
 	case VIVID_CID_DQBUF_ERROR:
@@ -1122,20 +1121,10 @@ static int vivid_streaming_s_ctrl(struct v4l2_ctrl *ctrl)
 		break;
 	case VIVID_CID_TIME_WRAP:
 		dev->time_wrap = ctrl->val;
-		if (ctrl->val == 0) {
-			dev->time_wrap_offset = 0;
-			break;
-		}
-		/*
-		 * We want to set the time 16 seconds before the 32 bit tv_sec
-		 * value of struct timeval would wrap around. So first we
-		 * calculate ktime_get_ns() % ((1 << 32) * NSEC_PER_SEC), and
-		 * then we set the offset to ((1 << 32) - 16) * NSEC_PER_SEC).
-		 */
-		div64_u64_rem(ktime_get_ns(),
-			0x100000000ULL * NSEC_PER_SEC, &rem);
-		dev->time_wrap_offset =
-			(0x100000000ULL - 16) * NSEC_PER_SEC - rem;
+		if (dev->time_wrap == 1)
+			dev->time_wrap = (1ULL << 63) - NSEC_PER_SEC * 16ULL;
+		else if (dev->time_wrap == 2)
+			dev->time_wrap = ((1ULL << 31) - 16) * NSEC_PER_SEC;
 		break;
 	}
 	return 0;
@@ -1208,13 +1197,20 @@ static const struct v4l2_ctrl_config vivid_ctrl_seq_wrap = {
 	.step = 1,
 };
 
+static const char * const vivid_ctrl_time_wrap_strings[] = {
+	"None",
+	"64 Bit",
+	"32 Bit",
+	NULL,
+};
+
 static const struct v4l2_ctrl_config vivid_ctrl_time_wrap = {
 	.ops = &vivid_streaming_ctrl_ops,
 	.id = VIVID_CID_TIME_WRAP,
 	.name = "Wrap Timestamp",
-	.type = V4L2_CTRL_TYPE_BOOLEAN,
-	.max = 1,
-	.step = 1,
+	.type = V4L2_CTRL_TYPE_MENU,
+	.max = ARRAY_SIZE(vivid_ctrl_time_wrap_strings) - 2,
+	.qmenu = vivid_ctrl_time_wrap_strings,
 };
 
 

drivers/media/test-drivers/vivid/vivid-kthread-cap.c

@@ -719,8 +719,7 @@ static noinline_for_stack void vivid_thread_vid_cap_tick(struct vivid_dev *dev,
 	if (!vid_cap_buf && !vbi_cap_buf && !meta_cap_buf)
 		goto update_mv;
 
-	f_time = dev->cap_frame_period * dev->vid_cap_seq_count +
-		 dev->cap_stream_start + dev->time_wrap_offset;
+	f_time = ktime_get_ns() + dev->time_wrap_offset;
 
 	if (vid_cap_buf) {
 		v4l2_ctrl_request_setup(vid_cap_buf->vb.vb2_buf.req_obj.req,
@@ -813,6 +812,10 @@ static int vivid_thread_vid_cap(void *data)
 	dev->cap_seq_resync = false;
 	dev->jiffies_vid_cap = jiffies;
 	dev->cap_stream_start = ktime_get_ns();
+	if (dev->time_wrap)
+		dev->time_wrap_offset = dev->time_wrap - dev->cap_stream_start;
+	else
+		dev->time_wrap_offset = 0;
 	vivid_cap_update_frame_period(dev);
 
 	for (;;) {

drivers/media/test-drivers/vivid/vivid-kthread-out.c

@@ -154,12 +154,13 @@ static int vivid_thread_vid_out(void *data)
 
 	/* Resets frame counters */
 	dev->out_seq_offset = 0;
-	if (dev->seq_wrap)
-		dev->out_seq_count = 0xffffff80U;
+	dev->out_seq_count = 0;
 	dev->jiffies_vid_out = jiffies;
-	dev->vid_out_seq_start = dev->vbi_out_seq_start = 0;
-	dev->meta_out_seq_start = 0;
 	dev->out_seq_resync = false;
+	if (dev->time_wrap)
+		dev->time_wrap_offset = dev->time_wrap - ktime_get_ns();
+	else
+		dev->time_wrap_offset = 0;
 
 	for (;;) {
 		try_to_freeze();

drivers/media/test-drivers/vivid/vivid-kthread-touch.c

@@ -62,6 +62,10 @@ static int vivid_thread_touch_cap(void *data)
 	dev->touch_cap_seq_count = 0;
 	dev->touch_cap_seq_resync = false;
 	dev->jiffies_touch_cap = jiffies;
+	if (dev->time_wrap)
+		dev->time_wrap_offset = dev->time_wrap - ktime_get_ns();
+	else
+		dev->time_wrap_offset = 0;
 
 	for (;;) {
 		try_to_freeze();
@@ -102,6 +106,8 @@ static int vivid_thread_touch_cap(void *data)
 		}
 		dropped_bufs = buffers_since_start + dev->touch_cap_seq_offset - dev->touch_cap_seq_count;
 		dev->touch_cap_seq_count = buffers_since_start + dev->touch_cap_seq_offset;
+		dev->touch_cap_with_seq_wrap_count =
+			dev->touch_cap_seq_count - dev->touch_cap_seq_start;
 
 		vivid_thread_tch_cap_tick(dev, dropped_bufs);
 
@@ -143,6 +149,7 @@ int vivid_start_generating_touch_cap(struct vivid_dev *dev)
 		return 0;
 	}
 
+	dev->touch_cap_seq_start = dev->seq_wrap * 128;
 	dev->kthread_touch_cap = kthread_run(vivid_thread_touch_cap, dev,
 					     "%s-tch-cap", dev->v4l2_dev.name);
 

drivers/media/test-drivers/vivid/vivid-sdr-cap.c

@@ -101,7 +101,7 @@ static void vivid_thread_sdr_cap_tick(struct vivid_dev *dev)
 	spin_unlock(&dev->slock);
 
 	if (sdr_cap_buf) {
-		sdr_cap_buf->vb.sequence = dev->sdr_cap_seq_count;
+		sdr_cap_buf->vb.sequence = dev->sdr_cap_with_seq_wrap_count;
 		v4l2_ctrl_request_setup(sdr_cap_buf->vb.vb2_buf.req_obj.req,
 					&dev->ctrl_hdl_sdr_cap);
 		v4l2_ctrl_request_complete(sdr_cap_buf->vb.vb2_buf.req_obj.req,
@@ -131,10 +131,13 @@ static int vivid_thread_sdr_cap(void *data)
 
 	/* Resets frame counters */
 	dev->sdr_cap_seq_offset = 0;
-	if (dev->seq_wrap)
-		dev->sdr_cap_seq_offset = 0xffffff80U;
+	dev->sdr_cap_seq_count = 0;
 	dev->jiffies_sdr_cap = jiffies;
 	dev->sdr_cap_seq_resync = false;
+	if (dev->time_wrap)
+		dev->time_wrap_offset = dev->time_wrap - ktime_get_ns();
+	else
+		dev->time_wrap_offset = 0;
 
 	for (;;) {
 		try_to_freeze();
@@ -174,6 +177,7 @@ static int vivid_thread_sdr_cap(void *data)
 		}
 		dev->sdr_cap_seq_count =
 			buffers_since_start + dev->sdr_cap_seq_offset;
+		dev->sdr_cap_with_seq_wrap_count = dev->sdr_cap_seq_count - dev->sdr_cap_seq_start;
 
 		vivid_thread_sdr_cap_tick(dev);
 		mutex_unlock(&dev->mutex);
@@ -263,7 +267,7 @@ static int sdr_cap_start_streaming(struct vb2_queue *vq, unsigned count)
 	int err = 0;
 
 	dprintk(dev, 1, "%s\n", __func__);
-	dev->sdr_cap_seq_count = 0;
+	dev->sdr_cap_seq_start = dev->seq_wrap * 128;
 	if (dev->start_streaming_error) {
 		dev->start_streaming_error = false;
 		err = -EINVAL;

drivers/media/test-drivers/vivid/vivid-touch-cap.c

@@ -262,7 +262,7 @@ void vivid_fillbuff_tch(struct vivid_dev *dev, struct vivid_buffer *buf)
 
 	__s16 *tch_buf = vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
 
-	buf->vb.sequence = dev->touch_cap_seq_count;
+	buf->vb.sequence = dev->touch_cap_with_seq_wrap_count;
 	test_pattern = (buf->vb.sequence / TCH_SEQ_COUNT) % TEST_CASE_MAX;
 	test_pat_idx = buf->vb.sequence % TCH_SEQ_COUNT;