MAJOR=4
MINOR=53
DEVNAME=tty53
  *   ˆl–Ü4ý( ©³( 	Å€fàB¦-ÿÌƒtM=_†I|¥+ÃË P    /* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * MIPI Display Bus Interface (DBI) LCD controller support
 *
 * Copyright 2016 Noralf TrÃ¸nnes
 */

#ifndef __LINUX_MIPI_DBI_H
#define __LINUX_MIPI_DBI_H

#include <linux/mutex.h>
#include <drm/drm_device.h>
#include <drm/drm_simple_kms_helper.h>

struct drm_format_conv_state;
struct drm_rect;
struct gpio_desc;
struct iosys_map;
struct regulator;
struct spi_device;

/**
 * struct mipi_dbi - MIPI DBI interface
 */
struct mipi_dbi {
	/**
	 * @cmdlock: Command lock
	 */
	struct mutex cmdlock;

	/**
	 * @command: Bus specific callback executing commands.
	 */
	int (*command)(struct mipi_dbi *dbi, u8 *cmd, u8 *param, size_t num);

	/**
	 * @read_commands: Array of read commands terminated by a zero entry.
	 *                 Reading is disabled if this is NULL.
	 */
	const u8 *read_commands;

	/**
	 * @swap_bytes: Swap bytes in buffer before transfer
	 */
	bool swap_bytes;

	/**
	 * @reset: Optional reset gpio
	 */
	struct gpio_desc *reset;

	/* Type C specific */

	/**
	 * @spi: SPI device
	 */
	struct spi_device *spi;

	/**
	 * @write_memory_bpw: Bits per word used on a MIPI_DCS_WRITE_MEMORY_START transfer
	 */
	unsigned int write_memory_bpw;

	/**
	 * @dc: Optional D/C gpio.
	 */
	struct gpio_desc *dc;

	/**
	 * @tx_buf9: Buffer used for Option 1 9-bit conversion
	 */
	void *tx_buf9;

	/**
	 * @tx_buf9_len: Size of tx_buf9.
	 */
	size_t tx_buf9_len;
};

/**
 * struct mipi_dbi_dev - MIPI DBI device
 */
struct mipi_dbi_dev {
	/**
	 * @drm: DRM device
	 */
	struct drm_device drm;

	/**
	 * @pipe: Display pipe structure
	 */
	struct drm_simple_display_pipe pipe;

	/**
	 * @connector: Connector
	 */
	struct drm_connector connector;

	/**
	 * @mode: Fixed display mode
	 */
	struct drm_display_mode mode;

	/**
	 * @pixel_format: Native pixel format (DRM_FORMAT\_\*)
	 */
	u32 pixel_format;

	/**
	 * @tx_buf: Buffer used for transfer (copy clip rect area)
	 */
	u16 *tx_buf;

	/**
	 * @rotation: initial rotation in degrees Counter Clock Wise
	 */
	unsigned int rotation;

	/**
	 * @left_offset: Horizontal offset of the display relative to the
	 *               controller's driver array
	 */
	unsigned int left_offset;

	/**
	 * @top_offset: Vertical offset of the display relative to the
	 *              controller's driver array
	 */
	unsigned int top_offset;

	/**
	 * @backlight: backlight device (optional)
	 */
	struct backlight_device *backlight;

	/**
	 * @regulator: power regulator (Vdd) (optional)
	 */
	struct regulator *regulator;

	/**
	 * @io_regulator: I/O power regulator (Vddi) (optional)
	 */
	struct regulator *io_regulator;

	/**
	 * @dbi: MIPI DBI interface
	 */
	struct mipi_dbi dbi;

	/**
	 * @driver_private: Driver private data.
	 *                  Necessary for drivers with private data since devm_drm_dev_alloc()
	 *                  can't allocate structures that embed a structure which then again
	 *                  embeds drm_device.
	 */
	void *driver_private;
};

static inline struct mipi_dbi_dev *drm_to_mipi_dbi_dev(struct drm_device *drm)
{
	return container_of(drm, struct mipi_dbi_dev, drm);
}

int mipi_dbi_spi_init(struct spi_device *spi, struct mipi_dbi *dbi,
		      struct gpio_desc *dc);
int mipi_dbi_dev_init_with_formats(struct mipi_dbi_dev *dbidev,
				   const struct drm_simple_display_pipe_funcs *funcs,
				   const uint32_t *formats, unsigned int format_count,
				   const struct drm_display_mode *mode,
				   unsigned int rotation, size_t tx_buf_size);
int mipi_dbi_dev_init(struct mipi_dbi_dev *dbidev,
		      const struct drm_simple_display_pipe_funcs *funcs,
		      const struct drm_display_mode *mode, unsigned int rotation);
enum drm_mode_status mipi_dbi_pipe_mode_valid(struct drm_simple_display_pipe *pipe,
					      const struct drm_display_mode *mode);
void mipi_dbi_pipe_update(struct drm_simple_display_pipe *pipe,
			  struct drm_plane_state *old_state);
void mipi_dbi_enable_flush(struct mipi_dbi_dev *dbidev,
			   struct drm_crtc_state *crtc_state,