Hi Archit,
On 03/04/14 09:49, Archit Taneja wrote:
> Add selection ioctl ops. For VPE, cropping makes sense only for the input to
> VPE(or V4L2_BUF_TYPE_VIDEO_OUTPUT/MPLANE buffers) and composing makes sense
> only for the output of VPE(or V4L2_BUF_TYPE_VIDEO_CAPTURE/MPLANE buffers).
>
> For the CAPTURE type, V4L2_SEL_TGT_COMPOSE results in VPE writing the output
> in a rectangle within the capture buffer. For the OUTPUT type, V4L2_SEL_TGT_CROP
> results in selecting a rectangle region within the source buffer.
>
> Setting the crop/compose rectangles should successfully result in
> re-configuration of registers which are affected when either source or
> destination dimensions change, set_srcdst_params() is called for this purpose.
>
> Signed-off-by: Archit Taneja <archit@xxxxxx>
> ---
> drivers/media/platform/ti-vpe/vpe.c | 142 ++++++++++++++++++++++++++++++++++++
> 1 file changed, 142 insertions(+)
>
> diff --git a/drivers/media/platform/ti-vpe/vpe.c b/drivers/media/platform/ti-vpe/vpe.c
> index 03a6846..b938590 100644
> --- a/drivers/media/platform/ti-vpe/vpe.c
> +++ b/drivers/media/platform/ti-vpe/vpe.c
> @@ -410,8 +410,10 @@ static struct vpe_q_data *get_q_data(struct vpe_ctx *ctx,
> {
> switch (type) {
> case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
> + case V4L2_BUF_TYPE_VIDEO_OUTPUT:
> return &ctx->q_data[Q_DATA_SRC];
> case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
> + case V4L2_BUF_TYPE_VIDEO_CAPTURE:
I noticed that the querycap implementation is wrong. It reports
V4L2_CAP_VIDEO_M2M instead of V4L2_CAP_VIDEO_M2M_MPLANE.
This driver is using the multiplanar formats, so the M2M_MPLANE cap should
be set.
This should be a separate patch.
BTW, did you test the driver with the v4l2-compliance tool? The latest version
(http://git.linuxtv.org/v4l-utils.git) has m2m support.
However, if you want to test streaming (the -s option), then you will probably
need to base your kernel on this tree:
http://git.linuxtv.org/hverkuil/media_tree.git/shortlog/refs/heads/vb2-part1
That branch contains a pile of fixes for vb2 and without that v4l2-compliance -s
will fail a number of tests.
> return &ctx->q_data[Q_DATA_DST];
> default:
> BUG();
> @@ -1585,6 +1587,143 @@ static int vpe_s_fmt(struct file *file, void *priv, struct v4l2_format *f)
> return set_srcdst_params(ctx);
> }
>
> +static int __vpe_try_selection(struct vpe_ctx *ctx, struct v4l2_selection *s)
> +{
> + struct vpe_q_data *q_data;
> +
> + if ((s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) &&
> + (s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT))
> + return -EINVAL;
> +
> + q_data = get_q_data(ctx, s->type);
> + if (!q_data)
> + return -EINVAL;
> +
> + switch (s->target) {
> + case V4L2_SEL_TGT_COMPOSE:
> + case V4L2_SEL_TGT_COMPOSE_DEFAULT:
> + case V4L2_SEL_TGT_COMPOSE_BOUNDS:
> + /*
> + * COMPOSE target is only valid for capture buffer type, for
> + * output buffer type, assign existing crop parameters to the
> + * selection rectangle
> + */
> + if (s->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
> + break;
> + } else {
No need for the 'else' keywork here.
> + s->r = q_data->c_rect;
> + return 0;
> + }
> +
> + case V4L2_SEL_TGT_CROP:
> + case V4L2_SEL_TGT_CROP_DEFAULT:
> + case V4L2_SEL_TGT_CROP_BOUNDS:
> + /*
> + * CROP target is only valid for output buffer type, for capture
> + * buffer type, assign existing compose parameters to the
> + * selection rectangle
> + */
> + if (s->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
> + break;
> + } else {
Ditto.
> + s->r = q_data->c_rect;
> + return 0;
> + }
> + default:
> + return -EINVAL;
> + }
> +
> + if (s->r.top < 0 || s->r.left < 0) {
> + vpe_err(ctx->dev, "negative values for top and left\n");
> + s->r.top = s->r.left = 0;
> + }
> +
> + v4l_bound_align_image(&s->r.width, MIN_W, q_data->width, 1,
> + &s->r.height, MIN_H, q_data->height, H_ALIGN, S_ALIGN);
> +
> + /* adjust left/top if cropping rectangle is out of bounds */
> + if (s->r.left + s->r.width > q_data->width)
> + s->r.left = q_data->width - s->r.width;
> + if (s->r.top + s->r.height > q_data->height)
> + s->r.top = q_data->height - s->r.height;
> +
> + return 0;
> +}
> +
> +static int vpe_g_selection(struct file *file, void *fh,
> + struct v4l2_selection *s)
> +{
> + struct vpe_ctx *ctx = file2ctx(file);
> + struct vpe_q_data *q_data;
> +
> + if ((s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) &&
> + (s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT))
> + return -EINVAL;
> +
> + q_data = get_q_data(ctx, s->type);
> + if (!q_data)
> + return -EINVAL;
> +
> + switch (s->target) {
> + /* return width and height from S_FMT of the respective buffer type */
> + case V4L2_SEL_TGT_COMPOSE_DEFAULT:
> + case V4L2_SEL_TGT_COMPOSE_BOUNDS:
> + case V4L2_SEL_TGT_CROP_BOUNDS:
> + case V4L2_SEL_TGT_CROP_DEFAULT:
> + s->r.left = 0;
> + s->r.top = 0;
> + s->r.width = q_data->width;
> + s->r.height = q_data->height;
> + return 0;
> +
> + /*
> + * CROP target holds for the output buffer type, and COMPOSE target
> + * holds for the capture buffer type. We still return the c_rect params
> + * for both the target types.
> + */
> + case V4L2_SEL_TGT_COMPOSE:
> + case V4L2_SEL_TGT_CROP:
> + s->r.left = q_data->c_rect.left;
> + s->r.top = q_data->c_rect.top;
> + s->r.width = q_data->c_rect.width;
> + s->r.height = q_data->c_rect.height;
> + return 0;
> + }
> +
> + return -EINVAL;
> +}
> +
> +
> +static int vpe_s_selection(struct file *file, void *fh,
> + struct v4l2_selection *s)
> +{
> + struct vpe_ctx *ctx = file2ctx(file);
> + struct vpe_q_data *q_data;
> + struct v4l2_selection sel = *s;
> + int ret;
> +
> + ret = __vpe_try_selection(ctx, &sel);
> + if (ret)
> + return ret;
> +
> + q_data = get_q_data(ctx, sel.type);
> + if (!q_data)
> + return -EINVAL;
> +
> + if ((q_data->c_rect.left == sel.r.left) &&
> + (q_data->c_rect.top == sel.r.top) &&
> + (q_data->c_rect.width == sel.r.width) &&
> + (q_data->c_rect.height == sel.r.height)) {
> + vpe_dbg(ctx->dev,
> + "requested crop/compose values are already set\n");
> + return 0;
> + }
> +
> + q_data->c_rect = sel.r;
> +
> + return set_srcdst_params(ctx);
> +}
> +
> static int vpe_reqbufs(struct file *file, void *priv,
> struct v4l2_requestbuffers *reqbufs)
> {
> @@ -1672,6 +1811,9 @@ static const struct v4l2_ioctl_ops vpe_ioctl_ops = {
> .vidioc_try_fmt_vid_out_mplane = vpe_try_fmt,
> .vidioc_s_fmt_vid_out_mplane = vpe_s_fmt,
>
> + .vidioc_g_selection = vpe_g_selection,
> + .vidioc_s_selection = vpe_s_selection,
> +
> .vidioc_reqbufs = vpe_reqbufs,
> .vidioc_querybuf = vpe_querybuf,
>
>
Regards,
Hans
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