[3/7] media: rkisp1: Add struct rkisp1_params_buffer

Create the 'struct rkisp1_params_buffer' type that wraps a
vb2_v4l2_buffer to prepare to hold a copy of the parameters buffer that
will be used to cache the user-provided configuration buffer in the
following patches.

Replace usage of 'struct rkisp1_buffer' with 'struct
rkisp1_params_buffer' in rkisp1-params.c to prepare for that.

Signed-off-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
---
 .../platform/rockchip/rkisp1/rkisp1-common.h  | 14 ++++++++++++-
 .../platform/rockchip/rkisp1/rkisp1-params.c  | 21 ++++++++++---------
 2 files changed, 24 insertions(+), 11 deletions(-)

Hi Jacopo,

Thank you for the patch.

On Fri, Jun 21, 2024 at 04:54:01PM +0200, Jacopo Mondi wrote:
> Create the 'struct rkisp1_params_buffer' type that wraps a
> vb2_v4l2_buffer to prepare to hold a copy of the parameters buffer that
> will be used to cache the user-provided configuration buffer in the
> following patches.
> 
> Replace usage of 'struct rkisp1_buffer' with 'struct
> rkisp1_params_buffer' in rkisp1-params.c to prepare for that.
> 
> Signed-off-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
> Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>

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

> ---
>  .../platform/rockchip/rkisp1/rkisp1-common.h  | 14 ++++++++++++-
>  .../platform/rockchip/rkisp1/rkisp1-params.c  | 21 ++++++++++---------
>  2 files changed, 24 insertions(+), 11 deletions(-)
> 
> diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-common.h b/drivers/media/platform/rockchip/rkisp1/rkisp1-common.h
> index 26573f6ae575..a615bbb0255e 100644
> --- a/drivers/media/platform/rockchip/rkisp1/rkisp1-common.h
> +++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-common.h
> @@ -232,7 +232,7 @@ struct rkisp1_vdev_node {
>  
>  /*
>   * struct rkisp1_buffer - A container for the vb2 buffers used by the video devices:
> - *			  params, stats, mainpath, selfpath
> + *			  stats, mainpath, selfpath
>   *
>   * @vb:		vb2 buffer
>   * @queue:	entry of the buffer in the queue
> @@ -244,6 +244,18 @@ struct rkisp1_buffer {
>  	dma_addr_t buff_addr[VIDEO_MAX_PLANES];
>  };
>  
> +/*
> + * struct rkisp1_params_buffer - A container for the vb2 buffers used by the
> + *				 params video device
> + *
> + * @vb:		vb2 buffer
> + * @queue:	entry of the buffer in the queue
> + */
> +struct rkisp1_params_buffer {
> +	struct vb2_v4l2_buffer vb;
> +	struct list_head queue;
> +};
> +
>  /*
>   * struct rkisp1_dummy_buffer - A buffer to write the next frame to in case
>   *				there are no vb2 buffers available.
> diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-params.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-params.c
> index 173d1ea41874..2844e55bc4f2 100644
> --- a/drivers/media/platform/rockchip/rkisp1/rkisp1-params.c
> +++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-params.c
> @@ -1502,20 +1502,21 @@ static void rkisp1_isp_isr_meas_config(struct rkisp1_params *params,
>  }
>  
>  static bool rkisp1_params_get_buffer(struct rkisp1_params *params,
> -				     struct rkisp1_buffer **buf,
> +				     struct rkisp1_params_buffer **buf,
>  				     struct rkisp1_params_cfg **cfg)
>  {
>  	if (list_empty(&params->params))
>  		return false;
>  
> -	*buf = list_first_entry(&params->params, struct rkisp1_buffer, queue);
> +	*buf = list_first_entry(&params->params, struct rkisp1_params_buffer,
> +				queue);
>  	*cfg = vb2_plane_vaddr(&(*buf)->vb.vb2_buf, 0);
>  
>  	return true;
>  }
>  
>  static void rkisp1_params_complete_buffer(struct rkisp1_params *params,
> -					  struct rkisp1_buffer *buf,
> +					  struct rkisp1_params_buffer *buf,
>  					  unsigned int frame_sequence)
>  {
>  	list_del(&buf->queue);
> @@ -1528,7 +1529,7 @@ void rkisp1_params_isr(struct rkisp1_device *rkisp1)
>  {
>  	struct rkisp1_params *params = &rkisp1->params;
>  	struct rkisp1_params_cfg *new_params;
> -	struct rkisp1_buffer *cur_buf;
> +	struct rkisp1_params_buffer *cur_buf;
>  
>  	spin_lock(&params->config_lock);
>  
> @@ -1604,7 +1605,7 @@ void rkisp1_params_pre_configure(struct rkisp1_params *params,
>  {
>  	struct rkisp1_cif_isp_hst_config hst = rkisp1_hst_params_default_config;
>  	struct rkisp1_params_cfg *new_params;
> -	struct rkisp1_buffer *cur_buf;
> +	struct rkisp1_params_buffer *cur_buf;
>  
>  	params->quantization = quantization;
>  	params->ycbcr_encoding = ycbcr_encoding;
> @@ -1650,7 +1651,7 @@ void rkisp1_params_pre_configure(struct rkisp1_params *params,
>  void rkisp1_params_post_configure(struct rkisp1_params *params)
>  {
>  	struct rkisp1_params_cfg *new_params;
> -	struct rkisp1_buffer *cur_buf;
> +	struct rkisp1_params_buffer *cur_buf;
>  
>  	spin_lock_irq(&params->config_lock);
>  
> @@ -1821,8 +1822,8 @@ static int rkisp1_params_vb2_queue_setup(struct vb2_queue *vq,
>  static void rkisp1_params_vb2_buf_queue(struct vb2_buffer *vb)
>  {
>  	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
> -	struct rkisp1_buffer *params_buf =
> -		container_of(vbuf, struct rkisp1_buffer, vb);
> +	struct rkisp1_params_buffer *params_buf =
> +		container_of(vbuf, struct rkisp1_params_buffer, vb);
>  	struct vb2_queue *vq = vb->vb2_queue;
>  	struct rkisp1_params *params = vq->drv_priv;
>  
> @@ -1844,7 +1845,7 @@ static int rkisp1_params_vb2_buf_prepare(struct vb2_buffer *vb)
>  static void rkisp1_params_vb2_stop_streaming(struct vb2_queue *vq)
>  {
>  	struct rkisp1_params *params = vq->drv_priv;
> -	struct rkisp1_buffer *buf;
> +	struct rkisp1_params_buffer *buf;
>  	LIST_HEAD(tmp_list);
>  
>  	/*
> @@ -1890,7 +1891,7 @@ static int rkisp1_params_init_vb2_queue(struct vb2_queue *q,
>  	q->drv_priv = params;
>  	q->ops = &rkisp1_params_vb2_ops;
>  	q->mem_ops = &vb2_vmalloc_memops;
> -	q->buf_struct_size = sizeof(struct rkisp1_buffer);
> +	q->buf_struct_size = sizeof(struct rkisp1_params_buffer);
>  	q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
>  	q->lock = &node->vlock;
>