| /* |
| * 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 */ |