/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Copyright (C) Rockchip Electronics Co., Ltd.
 * Author: Jacob Chen <jacob-chen@iotwrt.com>
 */
#ifndef __RGA_H__
#define __RGA_H__

#include <linux/platform_device.h>
#include <media/videobuf2-v4l2.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-device.h>

#define RGA_NAME "rockchip-rga"

struct rga_fmt {
        u32 fourcc;
        int depth;
        u8 uv_factor;
        u8 y_div;
        u8 x_div;
        u8 color_swap;
        u8 hw_format;
};

struct rga_frame {
        /* Original dimensions */
        u32 width;
        u32 height;
        u32 colorspace;

        /* Crop */
        struct v4l2_rect crop;

        /* Image format */
        struct rga_fmt *fmt;
        struct v4l2_pix_format_mplane pix;

        /* Variables that can calculated once and reused */
        u32 stride;
        u32 size;
};

struct rga_dma_desc {
        u32 addr;
};

struct rockchip_rga_version {
        u32 major;
        u32 minor;
};

struct rga_ctx {
        struct v4l2_fh fh;
        struct rockchip_rga *rga;
        struct rga_frame in;
        struct rga_frame out;
        struct v4l2_ctrl_handler ctrl_handler;

        int osequence;
        int csequence;

        /* Control values */
        u32 op;
        u32 hflip;
        u32 vflip;
        u32 rotate;
        u32 fill_color;
};

static inline struct rga_ctx *file_to_rga_ctx(struct file *filp)
{
        return container_of(file_to_v4l2_fh(filp), struct rga_ctx, fh);
}

struct rockchip_rga {
        struct v4l2_device v4l2_dev;
        struct v4l2_m2m_dev *m2m_dev;
        struct video_device *vfd;

        struct device *dev;
        struct regmap *grf;
        void __iomem *regs;
        struct clk *sclk;
        struct clk *aclk;
        struct clk *hclk;
        struct rockchip_rga_version version;

        /* vfd lock */
        struct mutex mutex;
        /* ctrl parm lock */
        spinlock_t ctrl_lock;

        struct rga_ctx *curr;
        dma_addr_t cmdbuf_phy;
        void *cmdbuf_virt;
};

struct rga_addr_offset {
        unsigned int y_off;
        unsigned int u_off;
        unsigned int v_off;
};

struct rga_vb_buffer {
        struct vb2_v4l2_buffer vb_buf;
        struct list_head queue;

        /* RGA MMU mapping for this buffer */
        struct rga_dma_desc *dma_desc;
        dma_addr_t dma_desc_pa;
        size_t n_desc;

        /* Plane offsets of this buffer into the mapping */
        struct rga_addr_offset offset;
};

static inline struct rga_vb_buffer *vb_to_rga(struct vb2_v4l2_buffer *vb)
{
        return container_of(vb, struct rga_vb_buffer, vb_buf);
}

struct rga_frame *rga_get_frame(struct rga_ctx *ctx, enum v4l2_buf_type type);

/* RGA Buffers Manage */
extern const struct vb2_ops rga_qops;

/* RGA Hardware */
static inline void rga_write(struct rockchip_rga *rga, u32 reg, u32 value)
{
        writel(value, rga->regs + reg);
};

static inline u32 rga_read(struct rockchip_rga *rga, u32 reg)
{
        return readl(rga->regs + reg);
};

static inline void rga_mod(struct rockchip_rga *rga, u32 reg, u32 val, u32 mask)
{
        u32 temp = rga_read(rga, reg) & ~(mask);

        temp |= val & mask;
        rga_write(rga, reg, temp);
};

void rga_hw_start(struct rockchip_rga *rga,
                  struct rga_vb_buffer *src, struct rga_vb_buffer *dst);

#endif