Re: [PATCH v5 05/10] media: rcar-isp: Switch to Streams API

[Laurent Pinchart <laurent.pinchart@ideasonboard.com>]

On Wed, Mar 11, 2026 at 03:53:18PM +0200, Tomi Valkeinen wrote:
> Switch to Streams API with a single hardcoded route.
> 
> For single-stream use case there should be no change in behavior.
> 
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen+renesas@ideasonboard.com>

Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>

> ---
>  drivers/media/platform/renesas/rcar-isp/csisp.c | 69 ++++++++++++++++++++++---
>  1 file changed, 62 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/media/platform/renesas/rcar-isp/csisp.c b/drivers/media/platform/renesas/rcar-isp/csisp.c
> index 58a9a3bd9f75..8ac45516aa39 100644
> --- a/drivers/media/platform/renesas/rcar-isp/csisp.c
> +++ b/drivers/media/platform/renesas/rcar-isp/csisp.c
> @@ -124,6 +124,17 @@ static const struct rcar_isp_format rcar_isp_formats[] = {
>  	},
>  };
>  
> +static const struct v4l2_mbus_framefmt risp_default_fmt = {
> +	.width = 1920,
> +	.height = 1080,
> +	.code = MEDIA_BUS_FMT_RGB888_1X24,
> +	.colorspace = V4L2_COLORSPACE_SRGB,
> +	.field = V4L2_FIELD_NONE,
> +	.ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT,
> +	.quantization = V4L2_QUANTIZATION_DEFAULT,
> +	.xfer_func = V4L2_XFER_FUNC_DEFAULT,
> +};
> +
>  static const struct rcar_isp_format *risp_code_to_fmt(unsigned int code)
>  {
>  	unsigned int i;
> @@ -216,13 +227,20 @@ static void risp_power_off(struct rcar_isp *isp)
>  
>  static int risp_start(struct rcar_isp *isp, struct v4l2_subdev_state *state)
>  {
> +	const struct v4l2_subdev_route *route;
>  	const struct v4l2_mbus_framefmt *fmt;
>  	const struct rcar_isp_format *format;
>  	unsigned int vc;
>  	u32 sel_csi = 0;
>  	int ret;
>  
> -	fmt = v4l2_subdev_state_get_format(state, RCAR_ISP_SINK);
> +	if (state->routing.num_routes != 1)
> +		return -EINVAL;
> +
> +	route = &state->routing.routes[0];
> +
> +	fmt = v4l2_subdev_state_get_format(state, route->sink_pad,
> +					   route->sink_stream);
>  	if (!fmt)
>  		return -EINVAL;
>  
> @@ -341,7 +359,7 @@ static int risp_set_pad_format(struct v4l2_subdev *sd,
>  			       struct v4l2_subdev_state *state,
>  			       struct v4l2_subdev_format *format)
>  {
> -	struct v4l2_mbus_framefmt *framefmt;
> +	struct v4l2_mbus_framefmt *fmt;
>  
>  	if (format->pad > RCAR_ISP_SINK)
>  		return v4l2_subdev_get_fmt(sd, state, format);
> @@ -349,10 +367,20 @@ static int risp_set_pad_format(struct v4l2_subdev *sd,
>  	if (!risp_code_to_fmt(format->format.code))
>  		format->format.code = rcar_isp_formats[0].code;
>  
> -	for (unsigned int i = 0; i < RCAR_ISP_NUM_PADS; i++) {
> -		framefmt = v4l2_subdev_state_get_format(state, i);
> -		*framefmt = format->format;
> -	}
> +	/* Set sink format. */
> +	fmt = v4l2_subdev_state_get_format(state, format->pad, format->stream);
> +	if (!fmt)
> +		return -EINVAL;
> +
> +	*fmt = format->format;
> +
> +	/* Propagate the format to the source pad. */
> +	fmt = v4l2_subdev_state_get_opposite_stream_format(state, format->pad,
> +							   format->stream);
> +	if (!fmt)
> +		return -EINVAL;
> +
> +	*fmt = format->format;
>  
>  	return 0;
>  }
> @@ -369,6 +397,32 @@ static const struct v4l2_subdev_ops rcar_isp_subdev_ops = {
>  	.pad	= &risp_pad_ops,
>  };
>  
> +static int risp_init_state(struct v4l2_subdev *sd,
> +			   struct v4l2_subdev_state *state)
> +{
> +	static struct v4l2_subdev_route routes[] = {
> +		{
> +			.sink_pad = RCAR_ISP_SINK,
> +			.sink_stream = 0,
> +			.source_pad = RCAR_ISP_PORT0,
> +			.source_stream = 0,
> +			.flags = V4L2_SUBDEV_ROUTE_FL_ACTIVE,
> +		},
> +	};
> +
> +	static const struct v4l2_subdev_krouting routing = {
> +		.num_routes = ARRAY_SIZE(routes),
> +		.routes = routes,
> +	};
> +
> +	return v4l2_subdev_set_routing_with_fmt(sd, state, &routing,
> +						&risp_default_fmt);
> +}
> +
> +static const struct v4l2_subdev_internal_ops risp_internal_ops = {
> +	.init_state = risp_init_state,
> +};
> +
>  /* -----------------------------------------------------------------------------
>   * Async handling and registration of subdevices and links
>   */
> @@ -526,11 +580,12 @@ static int risp_probe(struct platform_device *pdev)
>  
>  	isp->subdev.owner = THIS_MODULE;
>  	isp->subdev.dev = &pdev->dev;
> +	isp->subdev.internal_ops = &risp_internal_ops;
>  	v4l2_subdev_init(&isp->subdev, &rcar_isp_subdev_ops);
>  	v4l2_set_subdevdata(&isp->subdev, &pdev->dev);
>  	snprintf(isp->subdev.name, sizeof(isp->subdev.name), "%s %s",
>  		 KBUILD_MODNAME, dev_name(&pdev->dev));
> -	isp->subdev.flags = V4L2_SUBDEV_FL_HAS_DEVNODE;
> +	isp->subdev.flags = V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_STREAMS;
>  
>  	isp->subdev.entity.function = MEDIA_ENT_F_VID_MUX;
>  	isp->subdev.entity.ops = &risp_entity_ops;
> 

-- 
Regards,

Laurent Pinchart