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/* |
* 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. |
*/ |
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#ifndef __DRM_MIPI_DSI_H__ |
#define __DRM_MIPI_DSI_H__ |
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#include <linux/device.h> |
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struct mipi_dsi_host; |
struct mipi_dsi_device; |
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/* 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) |
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/** |
* 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; |
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size_t tx_len; |
const void *tx_buf; |
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size_t rx_len; |
void *rx_buf; |
}; |
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bool mipi_dsi_packet_format_is_short(u8 type); |
bool mipi_dsi_packet_format_is_long(u8 type); |
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/** |
* 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; |
}; |
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int mipi_dsi_create_packet(struct mipi_dsi_packet *packet, |
const struct mipi_dsi_msg *msg); |
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/** |
* 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); |
}; |
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/** |
* struct mipi_dsi_host - DSI host device |
* @dev: driver model device node for this DSI host |
* @ops: DSI host operations |
*/ |
struct mipi_dsi_host { |
struct device *dev; |
const struct mipi_dsi_host_ops *ops; |
}; |
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int mipi_dsi_host_register(struct mipi_dsi_host *host); |
void mipi_dsi_host_unregister(struct mipi_dsi_host *host); |
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/* DSI mode flags */ |
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/* 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) |
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enum mipi_dsi_pixel_format { |
MIPI_DSI_FMT_RGB888, |
MIPI_DSI_FMT_RGB666, |
MIPI_DSI_FMT_RGB666_PACKED, |
MIPI_DSI_FMT_RGB565, |
}; |
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/** |
* struct mipi_dsi_device - DSI peripheral device |
* @host: DSI host for this peripheral |
* @dev: driver model device node for this peripheral |
* @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; |
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unsigned int channel; |
unsigned int lanes; |
enum mipi_dsi_pixel_format format; |
unsigned long mode_flags; |
}; |
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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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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_set_maximum_return_packet_size(struct mipi_dsi_device *dsi, |
u16 value); |
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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); |
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/** |
* 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, |
}; |
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#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) |
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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); |
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/** |
* 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); |
}; |
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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); |
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#define mipi_dsi_driver_register(driver) \ |
mipi_dsi_driver_register_full(driver, THIS_MODULE) |
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#define module_mipi_dsi_driver(__mipi_dsi_driver) \ |
module_driver(__mipi_dsi_driver, mipi_dsi_driver_register, \ |
mipi_dsi_driver_unregister) |
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#endif /* __DRM_MIPI_DSI__ */ |