drm/tinydrm: Add MIPI DBI support (02dd95fe) · Commits · 戴 / test

Documentation/gpu/tinydrm.rst

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		@@ -28,3 +28,15 @@ Additional helpers

		.. kernel-doc:: drivers/gpu/drm/tinydrm/core/tinydrm-helpers.c
		:export:

		MIPI DBI Compatible Controllers
		===============================

		.. kernel-doc:: drivers/gpu/drm/tinydrm/mipi-dbi.c
		:doc: overview

		.. kernel-doc:: include/drm/tinydrm/mipi-dbi.h
		:internal:

		.. kernel-doc:: drivers/gpu/drm/tinydrm/mipi-dbi.c
		:export:

drivers/gpu/drm/tinydrm/Kconfig

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		@@ -8,3 +8,6 @@ menuconfig DRM_TINYDRM
		help
		Choose this option if you have a tinydrm supported display.
		If M is selected the module will be called tinydrm.

		config TINYDRM_MIPI_DBI
		tristate

drivers/gpu/drm/tinydrm/Makefile

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		obj-$(CONFIG_DRM_TINYDRM) += core/

		# Controllers
		obj-$(CONFIG_TINYDRM_MIPI_DBI) += mipi-dbi.o

drivers/gpu/drm/tinydrm/mipi-dbi.c

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File added.

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include/drm/tinydrm/mipi-dbi.h

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		/*
		* 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,
		const struct drm_simple_display_pipe_funcs *pipe_funcs,
		struct drm_driver *driver,
		const struct drm_display_mode *mode,
		unsigned int rotation);
		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 */

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