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Release 4.12 include/drm/drm_mipi_dsi.h

Directory: include/drm
/*
 * MIPI DSI Bus
 *
 * Copyright (C) 2012-2013, Samsung Electronics, Co., Ltd.
 * Andrzej Hajda <a.hajda@samsung.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#ifndef __DRM_MIPI_DSI_H__

#define __DRM_MIPI_DSI_H__

#include <linux/device.h>

struct mipi_dsi_host;
struct mipi_dsi_device;

/* request ACK from peripheral */

#define MIPI_DSI_MSG_REQ_ACK	BIT(0)
/* use Low Power Mode to transmit message */

#define MIPI_DSI_MSG_USE_LPM	BIT(1)

/**
 * struct mipi_dsi_msg - read/write DSI buffer
 * @channel: virtual channel id
 * @type: payload data type
 * @flags: flags controlling this message transmission
 * @tx_len: length of @tx_buf
 * @tx_buf: data to be written
 * @rx_len: length of @rx_buf
 * @rx_buf: data to be read, or NULL
 */

struct mipi_dsi_msg {
	
u8 channel;
	
u8 type;
	
u16 flags;

	
size_t tx_len;
	
const void *tx_buf;

	
size_t rx_len;
	
void *rx_buf;
};

bool mipi_dsi_packet_format_is_short(u8 type);
bool mipi_dsi_packet_format_is_long(u8 type);

/**
 * struct mipi_dsi_packet - represents a MIPI DSI packet in protocol format
 * @size: size (in bytes) of the packet
 * @header: the four bytes that make up the header (Data ID, Word Count or
 *     Packet Data, and ECC)
 * @payload_length: number of bytes in the payload
 * @payload: a pointer to a buffer containing the payload, if any
 */

struct mipi_dsi_packet {
	
size_t size;
	
u8 header[4];
	
size_t payload_length;
	
const u8 *payload;
};

int mipi_dsi_create_packet(struct mipi_dsi_packet *packet,
			   const struct mipi_dsi_msg *msg);

/**
 * struct mipi_dsi_host_ops - DSI bus operations
 * @attach: attach DSI device to DSI host
 * @detach: detach DSI device from DSI host
 * @transfer: transmit a DSI packet
 *
 * DSI packets transmitted by .transfer() are passed in as mipi_dsi_msg
 * structures. This structure contains information about the type of packet
 * being transmitted as well as the transmit and receive buffers. When an
 * error is encountered during transmission, this function will return a
 * negative error code. On success it shall return the number of bytes
 * transmitted for write packets or the number of bytes received for read
 * packets.
 *
 * Note that typically DSI packet transmission is atomic, so the .transfer()
 * function will seldomly return anything other than the number of bytes
 * contained in the transmit buffer on success.
 */

struct mipi_dsi_host_ops {
	
int (*attach)(struct mipi_dsi_host *host,
		      struct mipi_dsi_device *dsi);
	
int (*detach)(struct mipi_dsi_host *host,
		      struct mipi_dsi_device *dsi);
	
ssize_t (*transfer)(struct mipi_dsi_host *host,
			    const struct mipi_dsi_msg *msg);
};

/**
 * struct mipi_dsi_host - DSI host device
 * @dev: driver model device node for this DSI host
 * @ops: DSI host operations
 * @list: list management
 */

struct mipi_dsi_host {
	
struct device *dev;
	
const struct mipi_dsi_host_ops *ops;
	
struct list_head list;
};

int mipi_dsi_host_register(struct mipi_dsi_host *host);
void mipi_dsi_host_unregister(struct mipi_dsi_host *host);
struct mipi_dsi_host *of_find_mipi_dsi_host_by_node(struct device_node *node);

/* DSI mode flags */

/* video mode */

#define MIPI_DSI_MODE_VIDEO		BIT(0)
/* video burst mode */

#define MIPI_DSI_MODE_VIDEO_BURST	BIT(1)
/* video pulse mode */

#define MIPI_DSI_MODE_VIDEO_SYNC_PULSE	BIT(2)
/* enable auto vertical count mode */

#define MIPI_DSI_MODE_VIDEO_AUTO_VERT	BIT(3)
/* enable hsync-end packets in vsync-pulse and v-porch area */

#define MIPI_DSI_MODE_VIDEO_HSE		BIT(4)
/* disable hfront-porch area */

#define MIPI_DSI_MODE_VIDEO_HFP		BIT(5)
/* disable hback-porch area */

#define MIPI_DSI_MODE_VIDEO_HBP		BIT(6)
/* disable hsync-active area */

#define MIPI_DSI_MODE_VIDEO_HSA		BIT(7)
/* flush display FIFO on vsync pulse */

#define MIPI_DSI_MODE_VSYNC_FLUSH	BIT(8)
/* disable EoT packets in HS mode */

#define MIPI_DSI_MODE_EOT_PACKET	BIT(9)
/* device supports non-continuous clock behavior (DSI spec 5.6.1) */

#define MIPI_DSI_CLOCK_NON_CONTINUOUS	BIT(10)
/* transmit data in low power */

#define MIPI_DSI_MODE_LPM		BIT(11)


enum mipi_dsi_pixel_format {
	
MIPI_DSI_FMT_RGB888,
	
MIPI_DSI_FMT_RGB666,
	
MIPI_DSI_FMT_RGB666_PACKED,
	
MIPI_DSI_FMT_RGB565,
};


#define DSI_DEV_NAME_SIZE		20

/**
 * struct mipi_dsi_device_info - template for creating a mipi_dsi_device
 * @type: DSI peripheral chip type
 * @channel: DSI virtual channel assigned to peripheral
 * @node: pointer to OF device node or NULL
 *
 * This is populated and passed to mipi_dsi_device_new to create a new
 * DSI device
 */

struct mipi_dsi_device_info {
	
char type[DSI_DEV_NAME_SIZE];
	
u32 channel;
	
struct device_node *node;
};

/**
 * struct mipi_dsi_device - DSI peripheral device
 * @host: DSI host for this peripheral
 * @dev: driver model device node for this peripheral
 * @name: DSI peripheral chip type
 * @channel: virtual channel assigned to the peripheral
 * @format: pixel format for video mode
 * @lanes: number of active data lanes
 * @mode_flags: DSI operation mode related flags
 */

struct mipi_dsi_device {
	
struct mipi_dsi_host *host;
	
struct device dev;

	
char name[DSI_DEV_NAME_SIZE];
	
unsigned int channel;
	
unsigned int lanes;
	
enum mipi_dsi_pixel_format format;
	
unsigned long mode_flags;
};


#define MIPI_DSI_MODULE_PREFIX "mipi-dsi:"


static inline struct mipi_dsi_device *to_mipi_dsi_device(struct device *dev) { return container_of(dev, struct mipi_dsi_device, dev); }

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/** * mipi_dsi_pixel_format_to_bpp - obtain the number of bits per pixel for any * given pixel format defined by the MIPI DSI * specification * @fmt: MIPI DSI pixel format * * Returns: The number of bits per pixel of the given pixel format. */
static inline int mipi_dsi_pixel_format_to_bpp(enum mipi_dsi_pixel_format fmt) { switch (fmt) { case MIPI_DSI_FMT_RGB888: case MIPI_DSI_FMT_RGB666: return 24; case MIPI_DSI_FMT_RGB666_PACKED: return 18; case MIPI_DSI_FMT_RGB565: return 16; } return -EINVAL; }

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struct mipi_dsi_device * mipi_dsi_device_register_full(struct mipi_dsi_host *host, const struct mipi_dsi_device_info *info); void mipi_dsi_device_unregister(struct mipi_dsi_device *dsi); struct mipi_dsi_device *of_find_mipi_dsi_device_by_node(struct device_node *np); int mipi_dsi_attach(struct mipi_dsi_device *dsi); int mipi_dsi_detach(struct mipi_dsi_device *dsi); int mipi_dsi_shutdown_peripheral(struct mipi_dsi_device *dsi); int mipi_dsi_turn_on_peripheral(struct mipi_dsi_device *dsi); int mipi_dsi_set_maximum_return_packet_size(struct mipi_dsi_device *dsi, u16 value); ssize_t mipi_dsi_generic_write(struct mipi_dsi_device *dsi, const void *payload, size_t size); ssize_t mipi_dsi_generic_read(struct mipi_dsi_device *dsi, const void *params, size_t num_params, void *data, size_t size); /** * enum mipi_dsi_dcs_tear_mode - Tearing Effect Output Line mode * @MIPI_DSI_DCS_TEAR_MODE_VBLANK: the TE output line consists of V-Blanking * information only * @MIPI_DSI_DCS_TEAR_MODE_VHBLANK : the TE output line consists of both * V-Blanking and H-Blanking information */ enum mipi_dsi_dcs_tear_mode { MIPI_DSI_DCS_TEAR_MODE_VBLANK, MIPI_DSI_DCS_TEAR_MODE_VHBLANK, }; #define MIPI_DSI_DCS_POWER_MODE_DISPLAY (1 << 2) #define MIPI_DSI_DCS_POWER_MODE_NORMAL (1 << 3) #define MIPI_DSI_DCS_POWER_MODE_SLEEP (1 << 4) #define MIPI_DSI_DCS_POWER_MODE_PARTIAL (1 << 5) #define MIPI_DSI_DCS_POWER_MODE_IDLE (1 << 6) ssize_t mipi_dsi_dcs_write_buffer(struct mipi_dsi_device *dsi, const void *data, size_t len); ssize_t mipi_dsi_dcs_write(struct mipi_dsi_device *dsi, u8 cmd, const void *data, size_t len); ssize_t mipi_dsi_dcs_read(struct mipi_dsi_device *dsi, u8 cmd, void *data, size_t len); int mipi_dsi_dcs_nop(struct mipi_dsi_device *dsi); int mipi_dsi_dcs_soft_reset(struct mipi_dsi_device *dsi); int mipi_dsi_dcs_get_power_mode(struct mipi_dsi_device *dsi, u8 *mode); int mipi_dsi_dcs_get_pixel_format(struct mipi_dsi_device *dsi, u8 *format); int mipi_dsi_dcs_enter_sleep_mode(struct mipi_dsi_device *dsi); int mipi_dsi_dcs_exit_sleep_mode(struct mipi_dsi_device *dsi); int mipi_dsi_dcs_set_display_off(struct mipi_dsi_device *dsi); int mipi_dsi_dcs_set_display_on(struct mipi_dsi_device *dsi); int mipi_dsi_dcs_set_column_address(struct mipi_dsi_device *dsi, u16 start, u16 end); int mipi_dsi_dcs_set_page_address(struct mipi_dsi_device *dsi, u16 start, u16 end); int mipi_dsi_dcs_set_tear_off(struct mipi_dsi_device *dsi); int mipi_dsi_dcs_set_tear_on(struct mipi_dsi_device *dsi, enum mipi_dsi_dcs_tear_mode mode); int mipi_dsi_dcs_set_pixel_format(struct mipi_dsi_device *dsi, u8 format); int mipi_dsi_dcs_set_tear_scanline(struct mipi_dsi_device *dsi, u16 scanline); int mipi_dsi_dcs_set_display_brightness(struct mipi_dsi_device *dsi, u16 brightness); int mipi_dsi_dcs_get_display_brightness(struct mipi_dsi_device *dsi, u16 *brightness); /** * struct mipi_dsi_driver - DSI driver * @driver: device driver model driver * @probe: callback for device binding * @remove: callback for device unbinding * @shutdown: called at shutdown time to quiesce the device */ struct mipi_dsi_driver { struct device_driver driver; int(*probe)(struct mipi_dsi_device *dsi); int(*remove)(struct mipi_dsi_device *dsi); void (*shutdown)(struct mipi_dsi_device *dsi); };
static inline struct mipi_dsi_driver * to_mipi_dsi_driver(struct device_driver *driver) { return container_of(driver, struct mipi_dsi_driver, driver); }

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static inline void *mipi_dsi_get_drvdata(const struct mipi_dsi_device *dsi) { return dev_get_drvdata(&dsi->dev); }

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static inline void mipi_dsi_set_drvdata(struct mipi_dsi_device *dsi, void *data) { dev_set_drvdata(&dsi->dev, data); }

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int mipi_dsi_driver_register_full(struct mipi_dsi_driver *driver, struct module *owner); void mipi_dsi_driver_unregister(struct mipi_dsi_driver *driver); #define mipi_dsi_driver_register(driver) \ mipi_dsi_driver_register_full(driver, THIS_MODULE) #define module_mipi_dsi_driver(__mipi_dsi_driver) \ module_driver(__mipi_dsi_driver, mipi_dsi_driver_register, \ mipi_dsi_driver_unregister) #endif /* __DRM_MIPI_DSI__ */

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Liu Ying434.41%13.12%
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Werner Johansson181.84%13.12%
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Directory: include/drm
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