Re: [PATCH v5 7/7] media: rkisp1: Implement s_fmt/try_fmt

[Paul Elder <paul.elder@ideasonboard.com>]

On Wed, Jul 03, 2024 at 06:10:46PM +0200, Jacopo Mondi wrote:
> Implement in the rkisp1 driver support for the s_fmt and try_fmt
> operation to allow userspace to select between the extensible
> and the fixed parameters formats.
> 
> Implement enum_mbus_code to enumerate the fixed and the extensible
> formats and disallow changing the data format while the queue is busy.
> 
> Signed-off-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>

> ---
>  .../platform/rockchip/rkisp1/rkisp1-params.c  | 58 ++++++++++++++++---
>  1 file changed, 50 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-params.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-params.c
> index 3ef410337aa2..ea1ad92d2b21 100644
> --- a/drivers/media/platform/rockchip/rkisp1/rkisp1-params.c
> +++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-params.c
> @@ -75,6 +75,17 @@ static const struct v4l2_meta_format rkisp1_params_formats[] = {
>  	},
>  };
>  
> +static const struct v4l2_meta_format *
> +rkisp1_params_get_format_info(u32 dataformat)
> +{
> +	for (unsigned int i = 0; i < ARRAY_SIZE(rkisp1_params_formats); i++) {
> +		if (rkisp1_params_formats[i].dataformat == dataformat)
> +			return &rkisp1_params_formats[i];
> +	}
> +
> +	return &rkisp1_params_formats[RKISP1_PARAMS_FIXED];
> +}
> +
>  static inline void
>  rkisp1_param_set_bits(struct rkisp1_params *params, u32 reg, u32 bit_mask)
>  {
> @@ -2233,12 +2244,12 @@ static int rkisp1_params_enum_fmt_meta_out(struct file *file, void *priv,
>  					   struct v4l2_fmtdesc *f)
>  {
>  	struct video_device *video = video_devdata(file);
> -	struct rkisp1_params *params = video_get_drvdata(video);
>  
> -	if (f->index > 0 || f->type != video->queue->type)
> +	if (f->index >= ARRAY_SIZE(rkisp1_params_formats) ||
> +	    f->type != video->queue->type)
>  		return -EINVAL;
>  
> -	f->pixelformat = params->metafmt->dataformat;
> +	f->pixelformat = rkisp1_params_formats[f->index].dataformat;
>  
>  	return 0;
>  }
> @@ -2253,9 +2264,40 @@ static int rkisp1_params_g_fmt_meta_out(struct file *file, void *fh,
>  	if (f->type != video->queue->type)
>  		return -EINVAL;
>  
> -	memset(meta, 0, sizeof(*meta));
> -	meta->dataformat = params->metafmt->dataformat;
> -	meta->buffersize = params->metafmt->buffersize;
> +	*meta = *params->metafmt;
> +
> +	return 0;
> +}
> +
> +static int rkisp1_params_try_fmt_meta_out(struct file *file, void *fh,
> +					  struct v4l2_format *f)
> +{
> +	struct video_device *video = video_devdata(file);
> +	struct v4l2_meta_format *meta = &f->fmt.meta;
> +
> +	if (f->type != video->queue->type)
> +		return -EINVAL;
> +
> +	*meta = *rkisp1_params_get_format_info(meta->dataformat);
> +
> +	return 0;
> +}
> +
> +static int rkisp1_params_s_fmt_meta_out(struct file *file, void *fh,
> +					struct v4l2_format *f)
> +{
> +	struct video_device *video = video_devdata(file);
> +	struct rkisp1_params *params = video_get_drvdata(video);
> +	struct v4l2_meta_format *meta = &f->fmt.meta;
> +
> +	if (f->type != video->queue->type)
> +		return -EINVAL;
> +
> +	if (vb2_is_busy(video->queue))
> +		return -EBUSY;
> +
> +	params->metafmt = rkisp1_params_get_format_info(meta->dataformat);
> +	*meta = *params->metafmt;
>  
>  	return 0;
>  }
> @@ -2285,8 +2327,8 @@ static const struct v4l2_ioctl_ops rkisp1_params_ioctl = {
>  	.vidioc_streamoff = vb2_ioctl_streamoff,
>  	.vidioc_enum_fmt_meta_out = rkisp1_params_enum_fmt_meta_out,
>  	.vidioc_g_fmt_meta_out = rkisp1_params_g_fmt_meta_out,
> -	.vidioc_s_fmt_meta_out = rkisp1_params_g_fmt_meta_out,
> -	.vidioc_try_fmt_meta_out = rkisp1_params_g_fmt_meta_out,
> +	.vidioc_s_fmt_meta_out = rkisp1_params_s_fmt_meta_out,
> +	.vidioc_try_fmt_meta_out = rkisp1_params_try_fmt_meta_out,
>  	.vidioc_querycap = rkisp1_params_querycap,
>  	.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
>  	.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
> -- 
> 2.45.2
>