| /* | |
| * 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_pipe_enable(struct drm_simple_display_pipe *pipe, | |
| struct drm_crtc_state *crtc_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_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); | |
| /** | |
| * 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_buf(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 */ |