02acb76d72
Add two helpers, mipi_dsi_packet_format_is_{short,long}(), that help in
determining the format of a packet.
Signed-off-by: Thierry Reding <treding@nvidia.com>
181 lines
4.9 KiB
C
181 lines
4.9 KiB
C
/*
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* MIPI DSI Bus
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*
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* Copyright (C) 2012-2013, Samsung Electronics, Co., Ltd.
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* Andrzej Hajda <a.hajda@samsung.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef __DRM_MIPI_DSI_H__
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#define __DRM_MIPI_DSI_H__
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#include <linux/device.h>
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struct mipi_dsi_host;
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struct mipi_dsi_device;
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/* request ACK from peripheral */
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#define MIPI_DSI_MSG_REQ_ACK BIT(0)
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/* use Low Power Mode to transmit message */
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#define MIPI_DSI_MSG_USE_LPM BIT(1)
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/**
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* struct mipi_dsi_msg - read/write DSI buffer
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* @channel: virtual channel id
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* @type: payload data type
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* @tx_len: length of @tx_buf
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* @tx_buf: data to be written
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* @rx_len: length of @rx_buf
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* @rx_buf: data to be read, or NULL
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*/
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struct mipi_dsi_msg {
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u8 channel;
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u8 type;
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u16 flags;
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size_t tx_len;
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const void *tx_buf;
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size_t rx_len;
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void *rx_buf;
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};
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bool mipi_dsi_packet_format_is_short(u8 type);
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bool mipi_dsi_packet_format_is_long(u8 type);
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/**
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* struct mipi_dsi_host_ops - DSI bus operations
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* @attach: attach DSI device to DSI host
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* @detach: detach DSI device from DSI host
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* @transfer: send and/or receive DSI packet, return number of received bytes,
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* or error
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*/
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struct mipi_dsi_host_ops {
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int (*attach)(struct mipi_dsi_host *host,
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struct mipi_dsi_device *dsi);
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int (*detach)(struct mipi_dsi_host *host,
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struct mipi_dsi_device *dsi);
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ssize_t (*transfer)(struct mipi_dsi_host *host,
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struct mipi_dsi_msg *msg);
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};
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/**
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* struct mipi_dsi_host - DSI host device
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* @dev: driver model device node for this DSI host
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* @ops: DSI host operations
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*/
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struct mipi_dsi_host {
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struct device *dev;
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const struct mipi_dsi_host_ops *ops;
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};
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int mipi_dsi_host_register(struct mipi_dsi_host *host);
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void mipi_dsi_host_unregister(struct mipi_dsi_host *host);
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/* DSI mode flags */
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/* video mode */
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#define MIPI_DSI_MODE_VIDEO BIT(0)
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/* video burst mode */
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#define MIPI_DSI_MODE_VIDEO_BURST BIT(1)
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/* video pulse mode */
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#define MIPI_DSI_MODE_VIDEO_SYNC_PULSE BIT(2)
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/* enable auto vertical count mode */
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#define MIPI_DSI_MODE_VIDEO_AUTO_VERT BIT(3)
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/* enable hsync-end packets in vsync-pulse and v-porch area */
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#define MIPI_DSI_MODE_VIDEO_HSE BIT(4)
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/* disable hfront-porch area */
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#define MIPI_DSI_MODE_VIDEO_HFP BIT(5)
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/* disable hback-porch area */
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#define MIPI_DSI_MODE_VIDEO_HBP BIT(6)
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/* disable hsync-active area */
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#define MIPI_DSI_MODE_VIDEO_HSA BIT(7)
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/* flush display FIFO on vsync pulse */
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#define MIPI_DSI_MODE_VSYNC_FLUSH BIT(8)
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/* disable EoT packets in HS mode */
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#define MIPI_DSI_MODE_EOT_PACKET BIT(9)
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/* device supports non-continuous clock behavior (DSI spec 5.6.1) */
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#define MIPI_DSI_CLOCK_NON_CONTINUOUS BIT(10)
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/* transmit data in low power */
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#define MIPI_DSI_MODE_LPM BIT(11)
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enum mipi_dsi_pixel_format {
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MIPI_DSI_FMT_RGB888,
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MIPI_DSI_FMT_RGB666,
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MIPI_DSI_FMT_RGB666_PACKED,
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MIPI_DSI_FMT_RGB565,
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};
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/**
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* struct mipi_dsi_device - DSI peripheral device
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* @host: DSI host for this peripheral
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* @dev: driver model device node for this peripheral
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* @channel: virtual channel assigned to the peripheral
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* @format: pixel format for video mode
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* @lanes: number of active data lanes
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* @mode_flags: DSI operation mode related flags
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*/
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struct mipi_dsi_device {
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struct mipi_dsi_host *host;
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struct device dev;
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unsigned int channel;
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unsigned int lanes;
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enum mipi_dsi_pixel_format format;
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unsigned long mode_flags;
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};
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static inline struct mipi_dsi_device *to_mipi_dsi_device(struct device *dev)
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{
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return container_of(dev, struct mipi_dsi_device, dev);
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}
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int mipi_dsi_attach(struct mipi_dsi_device *dsi);
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int mipi_dsi_detach(struct mipi_dsi_device *dsi);
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ssize_t mipi_dsi_dcs_write(struct mipi_dsi_device *dsi, const void *data,
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size_t len);
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ssize_t mipi_dsi_dcs_read(struct mipi_dsi_device *dsi, u8 cmd, void *data,
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size_t len);
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/**
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* struct mipi_dsi_driver - DSI driver
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* @driver: device driver model driver
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* @probe: callback for device binding
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* @remove: callback for device unbinding
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* @shutdown: called at shutdown time to quiesce the device
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*/
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struct mipi_dsi_driver {
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struct device_driver driver;
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int(*probe)(struct mipi_dsi_device *dsi);
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int(*remove)(struct mipi_dsi_device *dsi);
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void (*shutdown)(struct mipi_dsi_device *dsi);
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};
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static inline struct mipi_dsi_driver *
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to_mipi_dsi_driver(struct device_driver *driver)
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{
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return container_of(driver, struct mipi_dsi_driver, driver);
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}
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static inline void *mipi_dsi_get_drvdata(const struct mipi_dsi_device *dsi)
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{
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return dev_get_drvdata(&dsi->dev);
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}
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static inline void mipi_dsi_set_drvdata(struct mipi_dsi_device *dsi, void *data)
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{
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dev_set_drvdata(&dsi->dev, data);
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}
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int mipi_dsi_driver_register(struct mipi_dsi_driver *driver);
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void mipi_dsi_driver_unregister(struct mipi_dsi_driver *driver);
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#define module_mipi_dsi_driver(__mipi_dsi_driver) \
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module_driver(__mipi_dsi_driver, mipi_dsi_driver_register, \
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mipi_dsi_driver_unregister)
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#endif /* __DRM_MIPI_DSI__ */
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