/* Public domain. */

#ifndef _DRM_MIPI_DSI_H_
#define _DRM_MIPI_DSI_H_

#include <sys/types.h>
#include <linux/errno.h>
#include <linux/types.h>

struct mipi_dsi_host;
struct mipi_dsi_device;
struct mipi_dsi_msg;
struct drm_dsc_picture_parameter_set;

struct mipi_dsi_host_ops {
        int (*attach)(struct mipi_dsi_host *, struct mipi_dsi_device *);
        int (*detach)(struct mipi_dsi_host *, struct mipi_dsi_device *);
        ssize_t (*transfer)(struct mipi_dsi_host *, const struct mipi_dsi_msg *);
};

struct mipi_dsi_host {
        const struct mipi_dsi_host_ops *ops;
};

struct mipi_dsi_device {
        struct mipi_dsi_host *host;
        uint32_t channel;
        uint32_t mode_flags;
#define MIPI_DSI_MODE_LPM       (1 << 0)
        bool attached;
        struct device dev;
};

struct mipi_dsi_msg {
        uint8_t type;
        uint8_t channel;
        uint16_t flags;
#define MIPI_DSI_MSG_USE_LPM    (1 << 0)
        const void *tx_buf;
        size_t tx_len;
        uint8_t *rx_buf;
        size_t rx_len;
};

struct mipi_dsi_packet {
        size_t size;
        size_t payload_length;
        uint8_t header[4];
        const uint8_t *payload;
};

enum mipi_dsi_dcs_tear_mode {
        MIPI_DSI_DCS_TEAR_MODE_UNUSED
};

enum mipi_dsi_pixel_format {
        MIPI_DSI_FMT_RGB888,
        MIPI_DSI_FMT_RGB666,
        MIPI_DSI_FMT_RGB666_PACKED,
        MIPI_DSI_FMT_RGB565,
};

enum mipi_dsi_compression_algo {
        MIPI_DSI_COMPRESSION_DSC
};

struct mipi_dsi_multi_context {
        struct mipi_dsi_device *dsi;
        int accum_err;
};

int mipi_dsi_attach(struct mipi_dsi_device *);
int mipi_dsi_create_packet(struct mipi_dsi_packet *,
    const struct mipi_dsi_msg *);
ssize_t mipi_dsi_generic_write(struct mipi_dsi_device *, const void *, size_t);
ssize_t mipi_dsi_dcs_write_buffer(struct mipi_dsi_device *, const void *,
    size_t);
ssize_t mipi_dsi_dcs_read(struct mipi_dsi_device *, u8, void *, size_t);
ssize_t mipi_dsi_dcs_write(struct mipi_dsi_device *, u8, const void *, size_t);
int mipi_dsi_dcs_nop(struct mipi_dsi_device *);
int mipi_dsi_set_maximum_return_packet_size(struct mipi_dsi_device *, u16);
bool mipi_dsi_packet_format_is_long(u8);
int mipi_dsi_compression_mode(struct mipi_dsi_device *, bool);
int mipi_dsi_picture_parameter_set(struct mipi_dsi_device *,
    const struct drm_dsc_picture_parameter_set *);

static inline int
mipi_dsi_pixel_format_to_bpp(enum mipi_dsi_pixel_format fmt)
{
        switch (fmt) {
        case MIPI_DSI_FMT_RGB888:
        case MIPI_DSI_FMT_RGB666:
                return 24;
        case MIPI_DSI_FMT_RGB666_PACKED:
                return 18;
        case MIPI_DSI_FMT_RGB565:
                return 16;
        }
        return -EINVAL;
}

#endif