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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 * @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 */ 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; unsigned long hs_rate; unsigned long lp_rate; }; #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); } /** * 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; } 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); } 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__ */