On 11/03/15 11:16, Junghak Sung wrote:
> Move timestamp from struct vb2_v4l2_buffer to struct vb2_buffer
> for common use, and change its type to u64 in order to handling
> y2038 problem. This patch also includes all device drivers' changes related to
> this restructuring.
>
> Signed-off-by: Junghak Sung <[email protected]>
> Signed-off-by: Geunyoung Kim <[email protected]>
> Acked-by: Seung-Woo Kim <[email protected]>
> Acked-by: Inki Dae <[email protected]>
> ---
<snip>
> diff --git a/drivers/media/pci/solo6x10/solo6x10-v4l2-enc.c
> b/drivers/media/pci/solo6x10/solo6x10-v4l2-enc.c
> index 1bd2fd4..61df3e4 100644
> --- a/drivers/media/pci/solo6x10/solo6x10-v4l2-enc.c
> +++ b/drivers/media/pci/solo6x10/solo6x10-v4l2-enc.c
> @@ -531,8 +531,8 @@ static int solo_enc_fillbuf(struct solo_enc_dev *solo_enc,
>
> if (!ret) {
> vbuf->sequence = solo_enc->sequence++;
> - vbuf->timestamp.tv_sec = vop_sec(vh);
> - vbuf->timestamp.tv_usec = vop_usec(vh);
> + vb->timestamp = ((u64) vop_sec(vh) * NSEC_PER_SEC) +
> + (vop_usec(vh) * NSEC_PER_USEC);
This is wrong. Just use ktime_get_ns() here. It is probably best to first make a
single patch to change the solo driver to use v4l2_get_timestamp(), then convert
that to ktime_get_ns() in this patch.
The problem is that the timestamp is taken from the mpeg header, and so it is
not a CLOCK_MONOTONIC timestamp as is signaled to the user. Never noticed this
before, but it is a solo driver bug.
>
> /* Check for motion flags */
> if (solo_is_motion_on(solo_enc) && enc_buf->motion) {
> diff --git a/drivers/media/pci/solo6x10/solo6x10-v4l2.c
> b/drivers/media/pci/solo6x10/solo6x10-v4l2.c
> index 26df903..44b00b8 100644
> --- a/drivers/media/pci/solo6x10/solo6x10-v4l2.c
> +++ b/drivers/media/pci/solo6x10/solo6x10-v4l2.c
> @@ -225,7 +225,7 @@ finish_buf:
> vb2_set_plane_payload(vb, 0,
> solo_vlines(solo_dev) * solo_bytesperline(solo_dev));
> vbuf->sequence = solo_dev->sequence++;
> - v4l2_get_timestamp(&vbuf->timestamp);
> + vb->timestamp = ktime_get_ns();
> }
>
> vb2_buffer_done(vb, error ? VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
<snip>
> diff --git a/drivers/media/platform/vivid/vivid-kthread-cap.c
> b/drivers/media/platform/vivid/vivid-kthread-cap.c
> index 83cc6d3..b0ad054 100644
> --- a/drivers/media/platform/vivid/vivid-kthread-cap.c
> +++ b/drivers/media/platform/vivid/vivid-kthread-cap.c
> @@ -441,7 +441,7 @@ static void vivid_fillbuff(struct vivid_dev *dev, struct
> vivid_buffer *buf)
> * "Start of Exposure".
> */
> if (dev->tstamp_src_is_soe)
> - v4l2_get_timestamp(&buf->vb.timestamp);
> + buf->vb.vb2_buf.timestamp = ktime_get_ns();
> if (dev->field_cap == V4L2_FIELD_ALTERNATE) {
> /*
> * 60 Hz standards start with the bottom field, 50 Hz standards
> @@ -558,8 +558,9 @@ static void vivid_fillbuff(struct vivid_dev *dev, struct
> vivid_buffer *buf)
> * the timestamp now.
> */
> if (!dev->tstamp_src_is_soe)
> - v4l2_get_timestamp(&buf->vb.timestamp);
> - buf->vb.timestamp.tv_sec += dev->time_wrap_offset;
> + buf->vb.vb2_buf.timestamp = ktime_get_ns();
> + buf->vb.vb2_buf.timestamp +=
> + ((u64) dev->time_wrap_offset * NSEC_PER_SEC);
I'd do this differently: make time_wrap_offset of type u64 and assign it
accordingly with nanoseconds. That way you can just do:
timestamp += dev->time_wrap_offset
vivid-ctrls.c also needs to be modified (vivid_streaming_s_ctrl(),
VIVID_CID_TIME_WRAP
case) to:
dev->time_wrap_offset = (0x100000000ULL - 16) * NSEC_PER_SEC -
ktime_get_ns();
The v4l2_get_timestamp() call there can be dropped.
> }
>
> /*
> diff --git a/drivers/media/platform/vivid/vivid-kthread-out.c
> b/drivers/media/platform/vivid/vivid-kthread-out.c
> index c2c46dc..6fd02c9 100644
> --- a/drivers/media/platform/vivid/vivid-kthread-out.c
> +++ b/drivers/media/platform/vivid/vivid-kthread-out.c
> @@ -95,8 +95,9 @@ static void vivid_thread_vid_out_tick(struct vivid_dev *dev)
> */
> vid_out_buf->vb.sequence /= 2;
> }
> - v4l2_get_timestamp(&vid_out_buf->vb.timestamp);
> - vid_out_buf->vb.timestamp.tv_sec += dev->time_wrap_offset;
> + vid_out_buf->vb.vb2_buf.timestamp = ktime_get_ns();
> + vid_out_buf->vb.vb2_buf.timestamp +=
> + ((u64) dev->time_wrap_offset * NSEC_PER_SEC);
> vb2_buffer_done(&vid_out_buf->vb.vb2_buf, dev->dqbuf_error ?
> VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
> dprintk(dev, 2, "vid_out buffer %d done\n",
> @@ -108,8 +109,9 @@ static void vivid_thread_vid_out_tick(struct vivid_dev
> *dev)
> vivid_sliced_vbi_out_process(dev, vbi_out_buf);
>
> vbi_out_buf->vb.sequence = dev->vbi_out_seq_count;
> - v4l2_get_timestamp(&vbi_out_buf->vb.timestamp);
> - vbi_out_buf->vb.timestamp.tv_sec += dev->time_wrap_offset;
> + vbi_out_buf->vb.vb2_buf.timestamp = ktime_get_ns();
> + vbi_out_buf->vb.vb2_buf.timestamp +=
> + ((u64) dev->time_wrap_offset * NSEC_PER_SEC);
> vb2_buffer_done(&vbi_out_buf->vb.vb2_buf, dev->dqbuf_error ?
> VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
> dprintk(dev, 2, "vbi_out buffer %d done\n",
> diff --git a/drivers/media/platform/vivid/vivid-sdr-cap.c
> b/drivers/media/platform/vivid/vivid-sdr-cap.c
> index 082c401..dbdb43d 100644
> --- a/drivers/media/platform/vivid/vivid-sdr-cap.c
> +++ b/drivers/media/platform/vivid/vivid-sdr-cap.c
> @@ -117,8 +117,9 @@ static void vivid_thread_sdr_cap_tick(struct vivid_dev
> *dev)
> if (sdr_cap_buf) {
> sdr_cap_buf->vb.sequence = dev->sdr_cap_seq_count;
> vivid_sdr_cap_process(dev, sdr_cap_buf);
> - v4l2_get_timestamp(&sdr_cap_buf->vb.timestamp);
> - sdr_cap_buf->vb.timestamp.tv_sec += dev->time_wrap_offset;
> + sdr_cap_buf->vb.vb2_buf.timestamp = ktime_get_ns();
> + sdr_cap_buf->vb.vb2_buf.timestamp +=
> + ((u64) dev->time_wrap_offset * NSEC_PER_SEC);
> vb2_buffer_done(&sdr_cap_buf->vb.vb2_buf, dev->dqbuf_error ?
> VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
> dev->dqbuf_error = false;
> diff --git a/drivers/media/platform/vivid/vivid-vbi-cap.c
> b/drivers/media/platform/vivid/vivid-vbi-cap.c
> index e903d02..2f5f330 100644
> --- a/drivers/media/platform/vivid/vivid-vbi-cap.c
> +++ b/drivers/media/platform/vivid/vivid-vbi-cap.c
> @@ -108,8 +108,9 @@ void vivid_raw_vbi_cap_process(struct vivid_dev *dev,
> struct vivid_buffer *buf)
> if (!VIVID_INVALID_SIGNAL(dev->std_signal_mode))
> vivid_vbi_gen_raw(&dev->vbi_gen, &vbi, vbuf);
>
> - v4l2_get_timestamp(&buf->vb.timestamp);
> - buf->vb.timestamp.tv_sec += dev->time_wrap_offset;
> + buf->vb.vb2_buf.timestamp = ktime_get_ns();
> + buf->vb.vb2_buf.timestamp +=
> + ((u64) dev->time_wrap_offset * NSEC_PER_SEC);
> }
>
>
> @@ -133,8 +134,9 @@ void vivid_sliced_vbi_cap_process(struct vivid_dev *dev,
> vbuf[i] = dev->vbi_gen.data[i];
> }
>
> - v4l2_get_timestamp(&buf->vb.timestamp);
> - buf->vb.timestamp.tv_sec += dev->time_wrap_offset;
> + buf->vb.vb2_buf.timestamp = ktime_get_ns();
> + buf->vb.vb2_buf.timestamp +=
> + ((u64) dev->time_wrap_offset * NSEC_PER_SEC);
> }
>
> static int vbi_cap_queue_setup(struct vb2_queue *vq, const void *parg,
<snip>
> diff --git a/drivers/media/v4l2-core/videobuf2-v4l2.c
> b/drivers/media/v4l2-core/videobuf2-v4l2.c
> index 27b4b9e..93e16375 100644
> --- a/drivers/media/v4l2-core/videobuf2-v4l2.c
> +++ b/drivers/media/v4l2-core/videobuf2-v4l2.c
> @@ -119,8 +119,9 @@ static int __set_timestamp(struct vb2_buffer *vb, const
> void *pb)
> * and the timecode field and flag if needed.
> */
> if ((q->timestamp_flags & V4L2_BUF_FLAG_TIMESTAMP_MASK) ==
> - V4L2_BUF_FLAG_TIMESTAMP_COPY)
> - vbuf->timestamp = b->timestamp;
> + V4L2_BUF_FLAG_TIMESTAMP_COPY) {
> + vb->timestamp = timeval_to_ns(&b->timestamp);
> + }
No need to add {} for a one-line statement.
> vbuf->flags |= b->flags & V4L2_BUF_FLAG_TIMECODE;
> if (b->flags & V4L2_BUF_FLAG_TIMECODE)
> vbuf->timecode = b->timecode;
<snip>
> diff --git a/include/media/videobuf2-core.h b/include/media/videobuf2-core.h
> index 647ebfe..6404f81 100644
> --- a/include/media/videobuf2-core.h
> +++ b/include/media/videobuf2-core.h
> @@ -211,6 +211,7 @@ struct vb2_queue;
> * @num_planes: number of planes in the buffer
> * on an internal driver queue
> * @planes: private per-plane information; do not change
> + * @timestamp: frame timestamp
Please mention the unit (ns).
> */
> struct vb2_buffer {
> struct vb2_queue *vb2_queue;
> @@ -219,6 +220,7 @@ struct vb2_buffer {
> unsigned int memory;
> unsigned int num_planes;
> struct vb2_plane planes[VB2_MAX_PLANES];
> + u64 timestamp;
>
> /* private: internal use only
> *
Other than these minor issues it looks good.
Regards,
Hans
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