![Thierry Reding](/assets/img/avatar_default.png)
struct mipi_dsi_msg is a read-only structure, drivers should never need to modify it. Make this explicit by making all references to the struct const. Acked-by: Andrzej Hajda <a.hajda@samsung.com> Reviewed-by: Sean Paul <seanpaul@chromium.org> Signed-off-by: Thierry Reding <treding@nvidia.com>
201 lines
5.6 KiB
C
201 lines
5.6 KiB
C
/*
|
|
* 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
|
|
* @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: send and/or receive DSI packet, return number of received bytes,
|
|
* or error
|
|
*/
|
|
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
|
|
*/
|
|
struct mipi_dsi_host {
|
|
struct device *dev;
|
|
const struct mipi_dsi_host_ops *ops;
|
|
};
|
|
|
|
int mipi_dsi_host_register(struct mipi_dsi_host *host);
|
|
void mipi_dsi_host_unregister(struct mipi_dsi_host *host);
|
|
|
|
/* 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,
|
|
};
|
|
|
|
/**
|
|
* 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;
|
|
|
|
unsigned int channel;
|
|
unsigned int lanes;
|
|
enum mipi_dsi_pixel_format format;
|
|
unsigned long mode_flags;
|
|
};
|
|
|
|
static inline struct mipi_dsi_device *to_mipi_dsi_device(struct device *dev)
|
|
{
|
|
return container_of(dev, struct mipi_dsi_device, dev);
|
|
}
|
|
|
|
int mipi_dsi_attach(struct mipi_dsi_device *dsi);
|
|
int mipi_dsi_detach(struct mipi_dsi_device *dsi);
|
|
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);
|
|
|
|
/**
|
|
* 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);
|
|
}
|
|
|
|
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(struct mipi_dsi_driver *driver);
|
|
void mipi_dsi_driver_unregister(struct mipi_dsi_driver *driver);
|
|
|
|
#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__ */
|