110 lines
3.5 KiB
C
110 lines
3.5 KiB
C
|
/*
|
||
|
|
* MIPI Display Bus Interface (DBI) LCD controller support
|
||
|
|
*
|
||
|
|
* Copyright 2016 Noralf Trønnes
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or modify
|
||
|
|
* it under the terms of the GNU General Public License as published by
|
||
|
|
* the Free Software Foundation; either version 2 of the License, or
|
||
|
|
* (at your option) any later version.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef __LINUX_MIPI_DBI_H
|
||
|
|
#define __LINUX_MIPI_DBI_H
|
||
|
|
|
||
|
|
#include <drm/tinydrm/tinydrm.h>
|
||
|
|
|
||
|
|
struct spi_device;
|
||
|
|
struct gpio_desc;
|
||
|
|
struct regulator;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* struct mipi_dbi - MIPI DBI controller
|
||
|
|
* @tinydrm: tinydrm base
|
||
|
|
* @spi: SPI device
|
||
|
|
* @enabled: Pipeline is enabled
|
||
|
|
* @cmdlock: Command lock
|
||
|
|
* @command: Bus specific callback executing commands.
|
||
|
|
* @read_commands: Array of read commands terminated by a zero entry.
|
||
|
|
* Reading is disabled if this is NULL.
|
||
|
|
* @dc: Optional D/C gpio.
|
||
|
|
* @tx_buf: Buffer used for transfer (copy clip rect area)
|
||
|
|
* @tx_buf9: Buffer used for Option 1 9-bit conversion
|
||
|
|
* @tx_buf9_len: Size of tx_buf9.
|
||
|
|
* @swap_bytes: Swap bytes in buffer before transfer
|
||
|
|
* @reset: Optional reset gpio
|
||
|
|
* @rotation: initial rotation in degrees Counter Clock Wise
|
||
|
|
* @backlight: backlight device (optional)
|
||
|
|
* @regulator: power regulator (optional)
|
||
|
|
*/
|
||
|
|
struct mipi_dbi {
|
||
|
|
struct tinydrm_device tinydrm;
|
||
|
|
struct spi_device *spi;
|
||
|
|
bool enabled;
|
||
|
|
struct mutex cmdlock;
|
||
|
|
int (*command)(struct mipi_dbi *mipi, u8 *cmd, u8 *param, size_t num);
|
||
|
|
const u8 *read_commands;
|
||
|
|
struct gpio_desc *dc;
|
||
|
|
u16 *tx_buf;
|
||
|
|
void *tx_buf9;
|
||
|
|
size_t tx_buf9_len;
|
||
|
|
bool swap_bytes;
|
||
|
|
struct gpio_desc *reset;
|
||
|
|
unsigned int rotation;
|
||
|
|
struct backlight_device *backlight;
|
||
|
|
struct regulator *regulator;
|
||
|
|
};
|
||
|
|
|
||
|
|
static inline struct mipi_dbi *
|
||
|
|
mipi_dbi_from_tinydrm(struct tinydrm_device *tdev)
|
||
|
|
{
|
||
|
|
return container_of(tdev, struct mipi_dbi, tinydrm);
|
||
|
|
}
|
||
|
|
|
||
|
|
int mipi_dbi_spi_init(struct spi_device *spi, struct mipi_dbi *mipi,
|
||
|
|
struct gpio_desc *dc);
|
||
|
|
int mipi_dbi_init(struct device *dev, struct mipi_dbi *mipi,
|
||
|
|
const struct drm_simple_display_pipe_funcs *pipe_funcs,
|
||
|
|
struct drm_driver *driver,
|
||
|
|
const struct drm_display_mode *mode, unsigned int rotation);
|
||
|
|
void mipi_dbi_enable_flush(struct mipi_dbi *mipi,
|
||
|
|
struct drm_crtc_state *crtc_state,
|
||
|
|
struct drm_plane_state *plan_state);
|
||
|
|
void mipi_dbi_pipe_disable(struct drm_simple_display_pipe *pipe);
|
||
|
|
void mipi_dbi_hw_reset(struct mipi_dbi *mipi);
|
||
|
|
bool mipi_dbi_display_is_on(struct mipi_dbi *mipi);
|
||
|
|
int mipi_dbi_poweron_reset(struct mipi_dbi *mipi);
|
||
|
|
int mipi_dbi_poweron_conditional_reset(struct mipi_dbi *mipi);
|
||
|
|
u32 mipi_dbi_spi_cmd_max_speed(struct spi_device *spi, size_t len);
|
||
|
|
|
||
|
|
int mipi_dbi_command_read(struct mipi_dbi *mipi, u8 cmd, u8 *val);
|
||
|
|
int mipi_dbi_command_buf(struct mipi_dbi *mipi, u8 cmd, u8 *data, size_t len);
|
||
|
|
int mipi_dbi_command_stackbuf(struct mipi_dbi *mipi, u8 cmd, u8 *data, size_t len);
|
||
|
|
int mipi_dbi_buf_copy(void *dst, struct drm_framebuffer *fb,
|
||
|
|
struct drm_clip_rect *clip, bool swap);
|
||
|
|
/**
|
||
|
|
* mipi_dbi_command - MIPI DCS command with optional parameter(s)
|
||
|
|
* @mipi: MIPI structure
|
||
|
|
* @cmd: Command
|
||
|
|
* @seq...: Optional parameter(s)
|
||
|
|
*
|
||
|
|
* Send MIPI DCS command to the controller. Use mipi_dbi_command_read() for
|
||
|
|
* get/read.
|
||
|
|
*
|
||
|
|
* Returns:
|
||
|
|
* Zero on success, negative error code on failure.
|
||
|
|
*/
|
||
|
|
#define mipi_dbi_command(mipi, cmd, seq...) \
|
||
|
|
({ \
|
||
|
|
u8 d[] = { seq }; \
|
||
|
|
mipi_dbi_command_stackbuf(mipi, cmd, d, ARRAY_SIZE(d)); \
|
||
|
|
})
|
||
|
|
|
||
|
|
#ifdef CONFIG_DEBUG_FS
|
||
|
|
int mipi_dbi_debugfs_init(struct drm_minor *minor);
|
||
|
|
#else
|
||
|
|
#define mipi_dbi_debugfs_init NULL
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif /* __LINUX_MIPI_DBI_H */
|