media: imx-mipi-csis: Use v4l2_subdev_enable_streams()

To support sources that implement the .enable_streams() and
.disable_streams() operations, replace the manual calls to the subdev
.s_stream() operation with the v4l2_subdev_enable_streams() and
v4l2_subdev_disable_streams() helpers. The helpers fall back to
.s_stream() if the source doesn't implement the new operations, so
backward compatibility is preserved.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
 drivers/media/platform/nxp/imx-mipi-csis.c | 22 +++++++++++++++-------
 1 file changed, 15 insertions(+), 7 deletions(-)


base-commit: 6ba59ff4227927d3a8530fc2973b80e94b54d58f

On 20/06/2024 02:24, Laurent Pinchart wrote:
> To support sources that implement the .enable_streams() and
> .disable_streams() operations, replace the manual calls to the subdev
> .s_stream() operation with the v4l2_subdev_enable_streams() and
> v4l2_subdev_disable_streams() helpers. The helpers fall back to
> .s_stream() if the source doesn't implement the new operations, so
> backward compatibility is preserved.
> 
> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> ---
>   drivers/media/platform/nxp/imx-mipi-csis.c | 22 +++++++++++++++-------
>   1 file changed, 15 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/media/platform/nxp/imx-mipi-csis.c b/drivers/media/platform/nxp/imx-mipi-csis.c
> index f49b06978f14..b9729a8883d6 100644
> --- a/drivers/media/platform/nxp/imx-mipi-csis.c
> +++ b/drivers/media/platform/nxp/imx-mipi-csis.c
> @@ -320,7 +320,11 @@ struct mipi_csis_device {
>   	struct v4l2_subdev sd;
>   	struct media_pad pads[CSIS_PADS_NUM];
>   	struct v4l2_async_notifier notifier;
> -	struct v4l2_subdev *src_sd;
> +
> +	struct {
> +		struct v4l2_subdev *sd;
> +		const struct media_pad *pad;
> +	} source;
>   
>   	struct v4l2_mbus_config_mipi_csi2 bus;
>   	u32 clk_frequency;
> @@ -597,7 +601,7 @@ static int mipi_csis_calculate_params(struct mipi_csis_device *csis,
>   	u32 lane_rate;
>   
>   	/* Calculate the line rate from the pixel rate. */
> -	link_freq = v4l2_get_link_freq(csis->src_sd->ctrl_handler,
> +	link_freq = v4l2_get_link_freq(csis->source.sd->ctrl_handler,
>   				       csis_fmt->width,
>   				       csis->bus.num_data_lanes * 2);
>   	if (link_freq < 0) {
> @@ -958,7 +962,8 @@ static int mipi_csis_s_stream(struct v4l2_subdev *sd, int enable)
>   	int ret;
>   
>   	if (!enable) {
> -		v4l2_subdev_call(csis->src_sd, video, s_stream, 0);
> +		v4l2_subdev_disable_streams(csis->source.sd,
> +					    csis->source.pad->index, BIT(0));
>   
>   		mipi_csis_stop_stream(csis);
>   		if (csis->debug.enable)
> @@ -986,7 +991,8 @@ static int mipi_csis_s_stream(struct v4l2_subdev *sd, int enable)
>   
>   	mipi_csis_start_stream(csis, format, csis_fmt);
>   
> -	ret = v4l2_subdev_call(csis->src_sd, video, s_stream, 1);
> +	ret = v4l2_subdev_enable_streams(csis->source.sd,
> +					 csis->source.pad->index, BIT(0));
>   	if (ret < 0)
>   		goto err_stop;
>   
> @@ -1233,12 +1239,14 @@ static int mipi_csis_link_setup(struct media_entity *entity,
>   	remote_sd = media_entity_to_v4l2_subdev(remote_pad->entity);
>   
>   	if (flags & MEDIA_LNK_FL_ENABLED) {
> -		if (csis->src_sd)
> +		if (csis->source.sd)
>   			return -EBUSY;
>   
> -		csis->src_sd = remote_sd;
> +		csis->source.sd = remote_sd;
> +		csis->source.pad = remote_pad;
>   	} else {
> -		csis->src_sd = NULL;
> +		csis->source.sd = NULL;
> +		csis->source.pad = NULL;
>   	}
>   
>   	return 0;
> 
> base-commit: 6ba59ff4227927d3a8530fc2973b80e94b54d58f

Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>

  Tomi

Hey Laurent,
Laurent Pinchart <laurent.pinchart@ideasonboard.com> writes:

> To support sources that implement the .enable_streams() and
> .disable_streams() operations, replace the manual calls to the subdev
> .s_stream() operation with the v4l2_subdev_enable_streams() and
> v4l2_subdev_disable_streams() helpers. The helpers fall back to
> .s_stream() if the source doesn't implement the new operations, so
> backward compatibility is preserved.
>
> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

Thanks for this, LGTM.

Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>

Cheers,
   Rui

> ---
>  drivers/media/platform/nxp/imx-mipi-csis.c | 22 +++++++++++++++-------
>  1 file changed, 15 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/media/platform/nxp/imx-mipi-csis.c b/drivers/media/platform/nxp/imx-mipi-csis.c
> index f49b06978f14..b9729a8883d6 100644
> --- a/drivers/media/platform/nxp/imx-mipi-csis.c
> +++ b/drivers/media/platform/nxp/imx-mipi-csis.c
> @@ -320,7 +320,11 @@ struct mipi_csis_device {
>  	struct v4l2_subdev sd;
>  	struct media_pad pads[CSIS_PADS_NUM];
>  	struct v4l2_async_notifier notifier;
> -	struct v4l2_subdev *src_sd;
> +
> +	struct {
> +		struct v4l2_subdev *sd;
> +		const struct media_pad *pad;
> +	} source;
>  
>  	struct v4l2_mbus_config_mipi_csi2 bus;
>  	u32 clk_frequency;
> @@ -597,7 +601,7 @@ static int mipi_csis_calculate_params(struct mipi_csis_device *csis,
>  	u32 lane_rate;
>  
>  	/* Calculate the line rate from the pixel rate. */
> -	link_freq = v4l2_get_link_freq(csis->src_sd->ctrl_handler,
> +	link_freq = v4l2_get_link_freq(csis->source.sd->ctrl_handler,
>  				       csis_fmt->width,
>  				       csis->bus.num_data_lanes * 2);
>  	if (link_freq < 0) {
> @@ -958,7 +962,8 @@ static int mipi_csis_s_stream(struct v4l2_subdev *sd, int enable)
>  	int ret;
>  
>  	if (!enable) {
> -		v4l2_subdev_call(csis->src_sd, video, s_stream, 0);
> +		v4l2_subdev_disable_streams(csis->source.sd,
> +					    csis->source.pad->index, BIT(0));
>  
>  		mipi_csis_stop_stream(csis);
>  		if (csis->debug.enable)
> @@ -986,7 +991,8 @@ static int mipi_csis_s_stream(struct v4l2_subdev *sd, int enable)
>  
>  	mipi_csis_start_stream(csis, format, csis_fmt);
>  
> -	ret = v4l2_subdev_call(csis->src_sd, video, s_stream, 1);
> +	ret = v4l2_subdev_enable_streams(csis->source.sd,
> +					 csis->source.pad->index, BIT(0));
>  	if (ret < 0)
>  		goto err_stop;
>  
> @@ -1233,12 +1239,14 @@ static int mipi_csis_link_setup(struct media_entity *entity,
>  	remote_sd = media_entity_to_v4l2_subdev(remote_pad->entity);
>  
>  	if (flags & MEDIA_LNK_FL_ENABLED) {
> -		if (csis->src_sd)
> +		if (csis->source.sd)
>  			return -EBUSY;
>  
> -		csis->src_sd = remote_sd;
> +		csis->source.sd = remote_sd;
> +		csis->source.pad = remote_pad;
>  	} else {
> -		csis->src_sd = NULL;
> +		csis->source.sd = NULL;
> +		csis->source.pad = NULL;
>  	}
>  
>  	return 0;
>
> base-commit: 6ba59ff4227927d3a8530fc2973b80e94b54d58f
> -- 
> Regards,
>
> Laurent Pinchart