Hi Fabio,
On Thu, 2021-10-07 at 09:57 -0300, Fabio Estevam wrote:
> PXP allows clockwise rotation of 0°, 90°, 180° and 270°.
>
> Add support for it.
>
> Tested on a imx6ull-evk.
>
> For example, to rotate 90° the following Gstreamer pipeline can
> be used:
>
> gst-launch-1.0 videotestsrc ! video/x-raw,width=640,height=480 ! \
> v4l2convert extra-controls=cid,rotate=90 ! \
> video/x-raw,width=120,height=160 ! fbdevsink
>
> Signed-off-by: Fabio Estevam <festevam@xxxxxxx>
> ---
> Changes since v2:
> - Move the swap prior to the first usage of dst_height.
>
> drivers/media/platform/imx-pxp.c | 38 ++++++++++++++++++++++++++++++--
> 1 file changed, 36 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/media/platform/imx-pxp.c b/drivers/media/platform/imx-pxp.c
> index 723b096fedd1..acfc77f9d58f 100644
> --- a/drivers/media/platform/imx-pxp.c
> +++ b/drivers/media/platform/imx-pxp.c
> @@ -168,6 +168,13 @@ enum {
> V4L2_M2M_DST = 1,
> };
>
> +enum pxp_rotation_modes {
> + PXP_ROTATE_0,
> + PXP_ROTATE_90,
> + PXP_ROTATE_180,
> + PXP_ROTATE_270,
These values are already defined in the imx-pxp.h header:
#define BV_PXP_CTRL_ROTATE0__ROT_0 0x0
#define BV_PXP_CTRL_ROTATE0__ROT_90 0x1
#define BV_PXP_CTRL_ROTATE0__ROT_180 0x2
#define BV_PXP_CTRL_ROTATE0__ROT_270 0x3
I'd use those instead.
> +};
> +
> static struct pxp_fmt *find_format(struct v4l2_format *f)
> {
> struct pxp_fmt *fmt;
> @@ -211,6 +218,7 @@ struct pxp_ctx {
> /* Processing mode */
> int mode;
> u8 alpha_component;
> + u8 rotation;
>
> enum v4l2_colorspace colorspace;
> enum v4l2_xfer_func xfer_func;
> @@ -767,14 +775,19 @@ static int pxp_start(struct pxp_ctx *ctx, struct vb2_v4l2_buffer *in_vb,
> V4L2_BUF_FLAG_BFRAME |
> V4L2_BUF_FLAG_TSTAMP_SRC_MASK);
>
> - /* Rotation disabled, 8x8 block size */
> + /* 8x8 block size */
> ctrl = BF_PXP_CTRL_VFLIP0(!!(ctx->mode & MEM2MEM_VFLIP)) |
> - BF_PXP_CTRL_HFLIP0(!!(ctx->mode & MEM2MEM_HFLIP));
> + BF_PXP_CTRL_HFLIP0(!!(ctx->mode & MEM2MEM_HFLIP)) |
> + BF_PXP_CTRL_ROTATE0(ctx->rotation);
> /* Always write alpha value as V4L2_CID_ALPHA_COMPONENT */
> out_ctrl = BF_PXP_OUT_CTRL_ALPHA(ctx->alpha_component) |
> BF_PXP_OUT_CTRL_ALPHA_OUTPUT(1) |
> pxp_v4l2_pix_fmt_to_out_format(dst_fourcc);
> out_buf = p_out;
> +
> + if (ctx->rotation == PXP_ROTATE_90 || ctx->rotation == PXP_ROTATE_270)
> + swap(dst_width, dst_height);
> +
> switch (dst_fourcc) {
> case V4L2_PIX_FMT_NV12:
> case V4L2_PIX_FMT_NV21:
> @@ -1297,6 +1310,22 @@ static int pxp_s_fmt_vid_out(struct file *file, void *priv,
> return 0;
> }
>
> +static u8 pxp_degrees_to_rot_mode(u32 degrees)
> +{
> + switch (degrees) {
> + case 0:
> + return PXP_ROTATE_0;
> + case 90:
> + return PXP_ROTATE_90;
> + case 180:
> + return PXP_ROTATE_180;
> + case 270:
> + return PXP_ROTATE_270;
> + default:
> + return PXP_ROTATE_0;
You can combine the 0° and default cases.
> + }
> +}
> +
> static int pxp_s_ctrl(struct v4l2_ctrl *ctrl)
> {
> struct pxp_ctx *ctx =
> @@ -1317,6 +1346,10 @@ static int pxp_s_ctrl(struct v4l2_ctrl *ctrl)
> ctx->mode &= ~MEM2MEM_VFLIP;
> break;
>
> + case V4L2_CID_ROTATE:
> + ctx->rotation = pxp_degrees_to_rot_mode(ctrl->val);
> + break;
> +
> case V4L2_CID_ALPHA_COMPONENT:
> ctx->alpha_component = ctrl->val;
> break;
> @@ -1524,6 +1557,7 @@ static int pxp_open(struct file *file)
> v4l2_ctrl_handler_init(hdl, 4);
> v4l2_ctrl_new_std(hdl, &pxp_ctrl_ops, V4L2_CID_HFLIP, 0, 1, 1, 0);
> v4l2_ctrl_new_std(hdl, &pxp_ctrl_ops, V4L2_CID_VFLIP, 0, 1, 1, 0);
> + v4l2_ctrl_new_std(hdl, &pxp_ctrl_ops, V4L2_CID_ROTATE, 0, 270, 90, 0);
> v4l2_ctrl_new_std(hdl, &pxp_ctrl_ops, V4L2_CID_ALPHA_COMPONENT,
> 0, 255, 1, 255);
> if (hdl->error) {
regards
Philipp
