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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* MIPI DSI Bus
*
* Copyright (C) 2012-2013, Samsung Electronics, Co., Ltd.
* Andrzej Hajda <a.hajda@samsung.com>
*/
#ifndef __DRM_MIPI_DSI_H__
#define __DRM_MIPI_DSI_H__
#include <linux/device.h>
#include <linux/delay.h>
struct mipi_dsi_host;
struct mipi_dsi_device;
struct drm_dsc_picture_parameter_set;
/* 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.
*
* Also note that those callbacks can be called no matter the state the
* host is in. Drivers that need the underlying device to be powered to
* perform these operations will first need to make sure it's been
* properly enabled.
*/
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_NO_HFP BIT(5)
/* disable hback-porch area */
#define MIPI_DSI_MODE_VIDEO_NO_HBP BIT(6)
/* disable hsync-active area */
#define MIPI_DSI_MODE_VIDEO_NO_HSA BIT(7)
/* disable EoT packets in HS mode */
#define MIPI_DSI_MODE_NO_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)
/* transmit data ending at the same time for all lanes within one hsync */
#define MIPI_DSI_HS_PKT_END_ALIGNED BIT(12)
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
* @attached: the DSI device has been successfully attached
* @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
* @hs_rate: maximum lane frequency for high speed mode in hertz, this should
* be set to the real limits of the hardware, zero is only accepted for
* legacy drivers
* @lp_rate: maximum lane frequency for low power mode in hertz, this should
* be set to the real limits of the hardware, zero is only accepted for
* legacy drivers
* @dsc: panel/bridge DSC pps payload to be sent
*/
struct mipi_dsi_device {
struct mipi_dsi_host *host;
struct device dev;
bool attached;
char name[DSI_DEV_NAME_SIZE];
unsigned int channel;
unsigned int lanes;
enum mipi_dsi_pixel_format format;
unsigned long mode_flags;
unsigned long hs_rate;
unsigned long lp_rate;
struct drm_dsc_config *dsc;
};
/**
* struct mipi_dsi_multi_context - Context to call multiple MIPI DSI funcs in a row
*/
struct mipi_dsi_multi_context {
/**
* @dsi: Pointer to the MIPI DSI device
*/
struct mipi_dsi_device *dsi;
/**
* @accum_err: Storage for the accumulated error over the multiple calls
*
* Init to 0. If a function encounters an error then the error code
* will be stored here. If you call a function and this points to a
* non-zero value then the function will be a noop. This allows calling
* a function many times in a row and just checking the error at the
* end to see if any of them failed.
*/
int accum_err;
};
#define MIPI_DSI_MODULE_PREFIX "mipi-dsi:"
#define to_mipi_dsi_device(__dev) container_of_const(__dev, struct mipi_dsi_device, dev)
extern const struct bus_type mipi_dsi_bus_type;
#define dev_is_mipi_dsi(dev) ((dev)->bus == &mipi_dsi_bus_type)
/**
* 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;
}
enum mipi_dsi_compression_algo {
MIPI_DSI_COMPRESSION_DSC = 0,
MIPI_DSI_COMPRESSION_VENDOR = 3,
/* other two values are reserved, DSI 1.3 */
};
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 *
devm_mipi_dsi_device_register_full(struct device *dev, struct mipi_dsi_host *host,
const struct mipi_dsi_device_info *info);
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 devm_mipi_dsi_attach(struct device *dev, 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);
int mipi_dsi_compression_mode(struct mipi_dsi_device *dsi, bool enable);
int mipi_dsi_compression_mode_ext(struct mipi_dsi_device *dsi, bool enable,
enum mipi_dsi_compression_algo algo,
unsigned int pps_selector);
int mipi_dsi_picture_parameter_set(struct mipi_dsi_device *dsi,
const struct drm_dsc_picture_parameter_set *pps);
void mipi_dsi_compression_mode_ext_multi(struct mipi_dsi_multi_context *ctx,
bool enable,
enum mipi_dsi_compression_algo algo,
unsigned int pps_selector);
void mipi_dsi_compression_mode_multi(struct mipi_dsi_multi_context *ctx,
bool enable);
void mipi_dsi_picture_parameter_set_multi(struct mipi_dsi_multi_context *ctx,
const struct drm_dsc_picture_parameter_set *pps);
ssize_t mipi_dsi_generic_write(struct mipi_dsi_device *dsi, const void *payload,
size_t size);
void mipi_dsi_generic_write_multi(struct mipi_dsi_multi_context *ctx,
const void *payload, size_t size);
void mipi_dsi_dual_generic_write_multi(struct mipi_dsi_multi_context *ctx,
struct mipi_dsi_device *dsi1,
struct mipi_dsi_device *dsi2,
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);
u32 drm_mipi_dsi_get_input_bus_fmt(enum mipi_dsi_pixel_format dsi_format);
#define mipi_dsi_msleep(ctx, delay) \
do { \
if (!(ctx)->accum_err) \
msleep(delay); \
} while (0)
#define mipi_dsi_usleep_range(ctx, min, max) \
do { \
if (!(ctx)->accum_err) \
usleep_range(min, max); \
} while (0)
/**
* 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);
int mipi_dsi_dcs_write_buffer_chatty(struct mipi_dsi_device *dsi,
const void *data, size_t len);
void mipi_dsi_dcs_write_buffer_multi(struct mipi_dsi_multi_context *ctx,
const void *data, size_t len);
void mipi_dsi_dual_dcs_write_buffer_multi(struct mipi_dsi_multi_context *ctx,
struct mipi_dsi_device *dsi1,
struct mipi_dsi_device *dsi2,
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);
void mipi_dsi_dcs_read_multi(struct mipi_dsi_multi_context *ctx, 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_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);
int mipi_dsi_dcs_set_display_brightness_large(struct mipi_dsi_device *dsi,
u16 brightness);
int mipi_dsi_dcs_get_display_brightness_large(struct mipi_dsi_device *dsi,
u16 *brightness);
void mipi_dsi_dcs_nop_multi(struct mipi_dsi_multi_context *ctx);
void mipi_dsi_dcs_enter_sleep_mode_multi(struct mipi_dsi_multi_context *ctx);
void mipi_dsi_dcs_exit_sleep_mode_multi(struct mipi_dsi_multi_context *ctx);
void mipi_dsi_dcs_set_display_off_multi(struct mipi_dsi_multi_context *ctx);
void mipi_dsi_dcs_set_display_on_multi(struct mipi_dsi_multi_context *ctx);
void mipi_dsi_dcs_set_tear_on_multi(struct mipi_dsi_multi_context *ctx,
enum mipi_dsi_dcs_tear_mode mode);
void mipi_dsi_turn_on_peripheral_multi(struct mipi_dsi_multi_context *ctx);
void mipi_dsi_dcs_soft_reset_multi(struct mipi_dsi_multi_context *ctx);
void mipi_dsi_dcs_set_display_brightness_multi(struct mipi_dsi_multi_context *ctx,
u16 brightness);
void mipi_dsi_dcs_set_pixel_format_multi(struct mipi_dsi_multi_context *ctx,
u8 format);
void mipi_dsi_dcs_set_column_address_multi(struct mipi_dsi_multi_context *ctx,
u16 start, u16 end);
void mipi_dsi_dcs_set_page_address_multi(struct mipi_dsi_multi_context *ctx,
u16 start, u16 end);
void mipi_dsi_dcs_set_tear_scanline_multi(struct mipi_dsi_multi_context *ctx,
u16 scanline);
void mipi_dsi_dcs_set_tear_off_multi(struct mipi_dsi_multi_context *ctx);
/**
* mipi_dsi_generic_write_seq_multi - transmit data using a generic write packet
*
* This macro will print errors for you and error handling is optimized for
* callers that call this multiple times in a row.
*
* @ctx: Context for multiple DSI transactions
* @seq: buffer containing the payload
*/
#define mipi_dsi_generic_write_seq_multi(ctx, seq...) \
do { \
static const u8 d[] = { seq }; \
mipi_dsi_generic_write_multi(ctx, d, ARRAY_SIZE(d)); \
} while (0)
/**
* mipi_dsi_generic_write_var_seq_multi - transmit non-constant data using a
* generic write packet
*
* This macro will print errors for you and error handling is optimized for
* callers that call this multiple times in a row.
*
* @ctx: Context for multiple DSI transactions
* @seq: buffer containing the payload
*/
#define mipi_dsi_generic_write_var_seq_multi(ctx, seq...) \
do { \
const u8 d[] = { seq }; \
mipi_dsi_generic_write_multi(ctx, d, ARRAY_SIZE(d)); \
} while (0)
/**
* mipi_dsi_dcs_write_seq_multi - transmit a DCS command with payload
*
* This macro will print errors for you and error handling is optimized for
* callers that call this multiple times in a row.
*
* @ctx: Context for multiple DSI transactions
* @cmd: Command
* @seq: buffer containing data to be transmitted
*/
#define mipi_dsi_dcs_write_seq_multi(ctx, cmd, seq...) \
do { \
static const u8 d[] = { cmd, seq }; \
mipi_dsi_dcs_write_buffer_multi(ctx, d, ARRAY_SIZE(d)); \
} while (0)
/**
* mipi_dsi_dcs_write_var_seq_multi - transmit a DCS command with non-constant
* payload
*
* This macro will print errors for you and error handling is optimized for
* callers that call this multiple times in a row.
*
* @ctx: Context for multiple DSI transactions
* @cmd: Command
* @seq: buffer containing data to be transmitted
*/
#define mipi_dsi_dcs_write_var_seq_multi(ctx, cmd, seq...) \
do { \
const u8 d[] = { cmd, seq }; \
mipi_dsi_dcs_write_buffer_multi(ctx, d, ARRAY_SIZE(d)); \
} while (0)
/**
* mipi_dsi_dual - send the same MIPI DSI command to two interfaces
*
* This macro will send the specified MIPI DSI command twice, once per each of
* the two interfaces supplied. This is useful for reducing duplication of code
* in panel drivers which use two parallel serial interfaces.
*
* Note that the _func parameter cannot accept a macro such as
* mipi_dsi_generic_write_multi() or mipi_dsi_dcs_write_buffer_multi(). See
* mipi_dsi_dual_generic_write_multi() and
* mipi_dsi_dual_dcs_write_buffer_multi() instead.
*
* WARNING: This macro reuses the _func argument and the optional trailing
* arguments twice each, which may cause unintended side effects. For example,
* adding the postfix increment ++ operator to one of the arguments to be
* passed to _func will cause the variable to be incremented twice instead of
* once and the variable will be its original value + 1 when sent to _dsi2.
*
* @_func: MIPI DSI function to pass context and arguments into
* @_ctx: Context for multiple DSI transactions
* @_dsi1: First DSI interface to act as recipient of the MIPI DSI command
* @_dsi2: Second DSI interface to act as recipient of the MIPI DSI command
* @...: Arguments to pass to MIPI DSI function or macro
*/
#define mipi_dsi_dual(_func, _ctx, _dsi1, _dsi2, ...) \
do { \
struct mipi_dsi_multi_context *_ctxcpy = (_ctx); \
_ctxcpy->dsi = (_dsi1); \
(_func)(_ctxcpy, ##__VA_ARGS__); \
_ctxcpy->dsi = (_dsi2); \
(_func)(_ctxcpy, ##__VA_ARGS__); \
} while (0)
/**
* mipi_dsi_dual_generic_write_seq_multi - transmit data using a generic write
* packet to two dsi interfaces, one after the other
*
* This macro will send the specified generic packet twice, once per each of
* the two interfaces supplied. This is useful for reducing duplication of code
* in panel drivers which use two parallel serial interfaces.
*
* Note that if an error occurs while transmitting the packet to the first DSI
* interface, the packet will not be sent to the second DSI interface.
*
* This macro will print errors for you and error handling is optimized for
* callers that call this multiple times in a row.
*
* @_ctx: Context for multiple DSI transactions
* @_dsi1: First DSI interface to act as recipient of packet
* @_dsi2: Second DSI interface to act as recipient of packet
* @_seq: buffer containing the payload
*/
#define mipi_dsi_dual_generic_write_seq_multi(_ctx, _dsi1, _dsi2, _seq...) \
do { \
static const u8 d[] = { _seq }; \
mipi_dsi_dual_generic_write_multi(_ctx, _dsi1, _dsi2, d, \
ARRAY_SIZE(d)); \
} while (0)
/**
* mipi_dsi_dual_dcs_write_seq_multi - transmit a DCS command with payload to
* two dsi interfaces, one after the other
*
* This macro will send the specified DCS command with payload twice, once per
* each of the two interfaces supplied. This is useful for reducing duplication
* of code in panel drivers which use two parallel serial interfaces.
*
* Note that if an error occurs while transmitting the payload to the first DSI
* interface, the payload will not be sent to the second DSI interface.
*
* This macro will print errors for you and error handling is optimized for
* callers that call this multiple times in a row.
*
* @_ctx: Context for multiple DSI transactions
* @_dsi1: First DSI interface to act as recipient of packet
* @_dsi2: Second DSI interface to act as recipient of packet
* @_cmd: Command
* @_seq: buffer containing the payload
*/
#define mipi_dsi_dual_dcs_write_seq_multi(_ctx, _dsi1, _dsi2, _cmd, _seq...) \
do { \
static const u8 d[] = { _cmd, _seq }; \
mipi_dsi_dual_dcs_write_buffer_multi(_ctx, _dsi1, _dsi2, d, \
ARRAY_SIZE(d)); \
} while (0)
/**
* 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);
void (*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);
}
static inline void *mipi_dsi_get_drvdata(const struct mipi_dsi_device *dsi)
{
return dev_get_drvdata(&dsi->dev);
}
static inline void mipi_dsi_set_drvdata(struct mipi_dsi_device *dsi, void *data)
{
dev_set_drvdata(&dsi->dev, data);
}
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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