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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* MIPI DSI Bus
*
* Andrzej Hajda <a.hajda@samsung.com>
*/
#ifndef __MIPI_DSI_H__
#define __MIPI_DSI_H__
#include <types.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)
/**
* @brief mipi_dsi_msg - read/write DSI buffer
*/
struct mipi_dsi_msg {
u8 channel; /**< virtual channel id */
u8 type; /**< payload data type */
u16 flags; /**< flags controlling this message transmission */
size_t tx_len; /**< length of tx_buf */
const void *tx_buf; /**< data to be written */
size_t rx_len; /**< length of rx_buf */
void *rx_buf; /**< data to be read, or NULL */
};
/**
* @brief mipi_dsi_host_ops - DSI bus operations
* @var mipi_dsi_host_ops::attach
* attach DSI device to DSI host
* @var mipi_dsi_host_ops::detach
* detach DSI device from DSI host
* @var mipi_dsi_host_ops::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);
};
/**
* @brief mipi_dsi_host - DSI host device
*/
struct mipi_dsi_host {
//struct device *dev;
void *dev; /**< driver model device node for this DSI host */
const struct mipi_dsi_host_ops *ops; /**< DSI host operations */
};
int mipi_dsi_host_register(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)
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_master_ops {
int (*enslave)(struct mipi_dsi_device *master,
struct mipi_dsi_device *slave);
int (*liberate)(struct mipi_dsi_device *master,
struct mipi_dsi_device *slave);
};
/**
* @brief mipi_dsi_device - DSI peripheral device
*
* For dual-channel interfaces, the master interface can be identified by the
* fact that it's .slave field is set to non-NULL. The slave interface will
* have the .master field set to non-NULL.
*/
struct mipi_dsi_device {
struct mipi_dsi_host *host; /**< DSI host for this peripheral */
unsigned int channel; /**< virtual channel assigned to the peripheral */
unsigned int lanes; /**< number of active data lanes */
enum mipi_dsi_pixel_format format; /**< pixel format for video mode */
unsigned long mode_flags; /**< DSI operation mode related flags */
const struct mipi_dsi_master_ops *ops; /**< callbacks for master/slave setup */
struct mipi_dsi_device *master; /**< master interface for dual-channel peripherals */
struct mipi_dsi_device *slave; /**< slave interface for dual-channel peripherals */
};
int mipi_dsi_attach(struct mipi_dsi_device *dsi);
int mipi_dsi_detach(struct mipi_dsi_device *dsi);
int mipi_dsi_enslave(struct mipi_dsi_device *master,
struct mipi_dsi_device *slave);
int mipi_dsi_liberate(struct mipi_dsi_device *master,
struct mipi_dsi_device *slave);
/**
* @brief mipi_dsi_dcs_tear_mode - Tearing Effect Output Line mode
* @var mipi_dsi_dcs_tear_mode::MIPI_DSI_DCS_TEAR_MODE_VBLANK
* The TE output line consists of V-Blanking information only
* @var mipi_dsi_dcs_tear_mode::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(struct mipi_dsi_device *dsi, u8 cmd,
const void *data, size_t len);
int mipi_dsi_dcs_exit_sleep_mode(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_address_mode(struct mipi_dsi_device *dsi,
bool reverse_page_address,
bool reverse_col_address,
bool reverse_page_col_address,
bool refresh_from_bottom,
bool reverse_rgb,
bool latch_right_to_left,
bool flip_horizontal,
bool flip_vertical);
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);
#define MIPI_CAL_CTRL 0x00
#define MIPI_CAL_CTRL_NOISE_FILTER(x) (((x) & 0xf) << 26)
#define MIPI_CAL_CTRL_PRESCALE(x) (((x) & 0x3) << 24)
#define MIPI_CAL_CTRL_CLKEN_OVR (1 << 4)
#define MIPI_CAL_CTRL_START (1 << 0)
#define MIPI_CAL_AUTOCAL_CTRL 0x01
#define MIPI_CAL_STATUS 0x02
#define MIPI_CAL_STATUS_DONE (1 << 16)
#define MIPI_CAL_STATUS_ACTIVE (1 << 0)
#define MIPI_CAL_CONFIG_CSIA 0x05
#define MIPI_CAL_CONFIG_CSIB 0x06
#define MIPI_CAL_CONFIG_CSIC 0x07
#define MIPI_CAL_CONFIG_CSID 0x08
#define MIPI_CAL_CONFIG_CSIE 0x09
#define MIPI_CAL_CONFIG_CSIF 0x0a
#define MIPI_CAL_CONFIG_DSIA 0x0e
#define MIPI_CAL_CONFIG_DSIB 0x0f
#define MIPI_CAL_CONFIG_DSIC 0x10
#define MIPI_CAL_CONFIG_DSID 0x11
#define MIPI_CAL_CONFIG_DSIA_CLK 0x19
#define MIPI_CAL_CONFIG_DSIB_CLK 0x1a
#define MIPI_CAL_CONFIG_CSIAB_CLK 0x1b
#define MIPI_CAL_CONFIG_DSIC_CLK 0x1c
#define MIPI_CAL_CONFIG_CSICD_CLK 0x1c
#define MIPI_CAL_CONFIG_DSID_CLK 0x1d
#define MIPI_CAL_CONFIG_CSIE_CLK 0x1d
/* for data and clock lanes */
#define MIPI_CAL_CONFIG_SELECT (1 << 21)
/* for data lanes */
#define MIPI_CAL_CONFIG_HSPDOS(x) (((x) & 0x1f) << 16)
#define MIPI_CAL_CONFIG_HSPUOS(x) (((x) & 0x1f) << 8)
#define MIPI_CAL_CONFIG_TERMOS(x) (((x) & 0x1f) << 0)
/* for clock lanes */
#define MIPI_CAL_CONFIG_HSCLKPDOSD(x) (((x) & 0x1f) << 8)
#define MIPI_CAL_CONFIG_HSCLKPUOSD(x) (((x) & 0x1f) << 0)
#define MIPI_CAL_BIAS_PAD_CFG0 0x16
#define MIPI_CAL_BIAS_PAD_PDVCLAMP (1 << 1)
#define MIPI_CAL_BIAS_PAD_E_VCLAMP_REF (1 << 0)
#define MIPI_CAL_BIAS_PAD_CFG1 0x17
#define MIPI_CAL_BIAS_PAD_DRV_DN_REF(x) (((x) & 0x7) << 16)
#define MIPI_CAL_BIAS_PAD_DRV_UP_REF(x) (((x) & 0x7) << 8)
#define MIPI_CAL_BIAS_PAD_CFG2 0x18
#define MIPI_CAL_BIAS_PAD_VCLAMP(x) (((x) & 0x7) << 16)
#define MIPI_CAL_BIAS_PAD_VAUXP(x) (((x) & 0x7) << 4)
#define MIPI_CAL_BIAS_PAD_PDVREG (1 << 1)
struct tegra_mipi_pad {
unsigned long data;
unsigned long clk;
};
struct tegra_mipi_soc {
int has_clk_lane;
const struct tegra_mipi_pad *pads;
unsigned int num_pads;
int clock_enable_override;
int needs_vclamp_ref;
/* bias pad configuration settings */
u8 pad_drive_down_ref;
u8 pad_drive_up_ref;
u8 pad_vclamp_level;
u8 pad_vauxp_level;
/* calibration settings for data lanes */
u8 hspdos;
u8 hspuos;
u8 termos;
/* calibration settings for clock lanes */
u8 hsclkpdos;
u8 hsclkpuos;
};
struct tegra_mipi {
const struct tegra_mipi_soc *soc;
void *regs;
};
struct tegra_mipi_device {
struct tegra_mipi *mipi;
unsigned long pads;
};
struct tegra_mipi_device *tegra_mipi_request(struct tegra_mipi_device *device,
int device_index);
int tegra_mipi_calibrate(struct tegra_mipi_device *device);
#endif /* __MIPI_DSI_H__ */
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