497 lines
17 KiB
C
497 lines
17 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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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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#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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#include <linux/delay.h>
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struct mipi_dsi_host;
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struct mipi_dsi_device;
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struct drm_dsc_picture_parameter_set;
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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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* @flags: flags controlling this message transmission
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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_packet - represents a MIPI DSI packet in protocol format
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* @size: size (in bytes) of the packet
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* @header: the four bytes that make up the header (Data ID, Word Count or
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* Packet Data, and ECC)
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* @payload_length: number of bytes in the payload
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* @payload: a pointer to a buffer containing the payload, if any
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*/
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struct mipi_dsi_packet {
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size_t size;
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u8 header[4];
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size_t payload_length;
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const u8 *payload;
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};
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int mipi_dsi_create_packet(struct mipi_dsi_packet *packet,
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const struct mipi_dsi_msg *msg);
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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: transmit a DSI packet
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*
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* DSI packets transmitted by .transfer() are passed in as mipi_dsi_msg
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* structures. This structure contains information about the type of packet
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* being transmitted as well as the transmit and receive buffers. When an
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* error is encountered during transmission, this function will return a
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* negative error code. On success it shall return the number of bytes
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* transmitted for write packets or the number of bytes received for read
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* packets.
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*
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* Note that typically DSI packet transmission is atomic, so the .transfer()
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* function will seldomly return anything other than the number of bytes
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* contained in the transmit buffer on success.
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*
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* Also note that those callbacks can be called no matter the state the
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* host is in. Drivers that need the underlying device to be powered to
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* perform these operations will first need to make sure it's been
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* properly enabled.
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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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const 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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* @list: list management
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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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struct list_head list;
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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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struct mipi_dsi_host *of_find_mipi_dsi_host_by_node(struct device_node *node);
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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_NO_HFP BIT(5)
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/* disable hback-porch area */
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#define MIPI_DSI_MODE_VIDEO_NO_HBP BIT(6)
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/* disable hsync-active area */
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#define MIPI_DSI_MODE_VIDEO_NO_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_NO_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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/* transmit data ending at the same time for all lanes within one hsync */
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#define MIPI_DSI_HS_PKT_END_ALIGNED BIT(12)
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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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#define DSI_DEV_NAME_SIZE 20
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/**
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* struct mipi_dsi_device_info - template for creating a mipi_dsi_device
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* @type: DSI peripheral chip type
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* @channel: DSI virtual channel assigned to peripheral
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* @node: pointer to OF device node or NULL
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*
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* This is populated and passed to mipi_dsi_device_new to create a new
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* DSI device
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*/
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struct mipi_dsi_device_info {
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char type[DSI_DEV_NAME_SIZE];
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u32 channel;
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struct device_node *node;
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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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* @attached: the DSI device has been successfully attached
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* @name: DSI peripheral chip type
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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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* @hs_rate: maximum lane frequency for high speed mode in hertz, this should
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* be set to the real limits of the hardware, zero is only accepted for
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* legacy drivers
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* @lp_rate: maximum lane frequency for low power mode in hertz, this should
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* be set to the real limits of the hardware, zero is only accepted for
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* legacy drivers
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* @dsc: panel/bridge DSC pps payload to be sent
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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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bool attached;
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char name[DSI_DEV_NAME_SIZE];
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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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unsigned long hs_rate;
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unsigned long lp_rate;
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struct drm_dsc_config *dsc;
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};
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/**
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* struct mipi_dsi_multi_context - Context to call multiple MIPI DSI funcs in a row
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*/
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struct mipi_dsi_multi_context {
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/**
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* @dsi: Pointer to the MIPI DSI device
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*/
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struct mipi_dsi_device *dsi;
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/**
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* @accum_err: Storage for the accumulated error over the multiple calls
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*
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* Init to 0. If a function encounters an error then the error code
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* will be stored here. If you call a function and this points to a
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* non-zero value then the function will be a noop. This allows calling
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* a function many times in a row and just checking the error at the
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* end to see if any of them failed.
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*/
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int accum_err;
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};
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#define MIPI_DSI_MODULE_PREFIX "mipi-dsi:"
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#define to_mipi_dsi_device(__dev) container_of_const(__dev, struct mipi_dsi_device, dev)
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/**
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* mipi_dsi_pixel_format_to_bpp - obtain the number of bits per pixel for any
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* given pixel format defined by the MIPI DSI
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* specification
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* @fmt: MIPI DSI pixel format
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*
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* Returns: The number of bits per pixel of the given pixel format.
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*/
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static inline int mipi_dsi_pixel_format_to_bpp(enum mipi_dsi_pixel_format fmt)
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{
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switch (fmt) {
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case MIPI_DSI_FMT_RGB888:
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case MIPI_DSI_FMT_RGB666:
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return 24;
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case MIPI_DSI_FMT_RGB666_PACKED:
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return 18;
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case MIPI_DSI_FMT_RGB565:
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return 16;
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}
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return -EINVAL;
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}
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enum mipi_dsi_compression_algo {
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MIPI_DSI_COMPRESSION_DSC = 0,
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MIPI_DSI_COMPRESSION_VENDOR = 3,
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/* other two values are reserved, DSI 1.3 */
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};
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struct mipi_dsi_device *
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mipi_dsi_device_register_full(struct mipi_dsi_host *host,
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const struct mipi_dsi_device_info *info);
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void mipi_dsi_device_unregister(struct mipi_dsi_device *dsi);
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struct mipi_dsi_device *
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devm_mipi_dsi_device_register_full(struct device *dev, struct mipi_dsi_host *host,
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const struct mipi_dsi_device_info *info);
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struct mipi_dsi_device *of_find_mipi_dsi_device_by_node(struct device_node *np);
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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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int devm_mipi_dsi_attach(struct device *dev, struct mipi_dsi_device *dsi);
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int mipi_dsi_shutdown_peripheral(struct mipi_dsi_device *dsi);
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int mipi_dsi_turn_on_peripheral(struct mipi_dsi_device *dsi);
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int mipi_dsi_set_maximum_return_packet_size(struct mipi_dsi_device *dsi,
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u16 value);
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int mipi_dsi_compression_mode(struct mipi_dsi_device *dsi, bool enable);
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int mipi_dsi_compression_mode_ext(struct mipi_dsi_device *dsi, bool enable,
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enum mipi_dsi_compression_algo algo,
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unsigned int pps_selector);
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int mipi_dsi_picture_parameter_set(struct mipi_dsi_device *dsi,
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const struct drm_dsc_picture_parameter_set *pps);
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void mipi_dsi_compression_mode_ext_multi(struct mipi_dsi_multi_context *ctx,
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bool enable,
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enum mipi_dsi_compression_algo algo,
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unsigned int pps_selector);
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void mipi_dsi_picture_parameter_set_multi(struct mipi_dsi_multi_context *ctx,
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const struct drm_dsc_picture_parameter_set *pps);
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ssize_t mipi_dsi_generic_write(struct mipi_dsi_device *dsi, const void *payload,
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size_t size);
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int mipi_dsi_generic_write_chatty(struct mipi_dsi_device *dsi,
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const void *payload, size_t size);
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void mipi_dsi_generic_write_multi(struct mipi_dsi_multi_context *ctx,
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const void *payload, size_t size);
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ssize_t mipi_dsi_generic_read(struct mipi_dsi_device *dsi, const void *params,
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size_t num_params, void *data, size_t size);
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#define mipi_dsi_msleep(ctx, delay) \
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do { \
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if (!(ctx)->accum_err) \
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msleep(delay); \
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} while (0)
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#define mipi_dsi_usleep_range(ctx, min, max) \
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do { \
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if (!(ctx)->accum_err) \
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usleep_range(min, max); \
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} while (0)
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/**
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* enum mipi_dsi_dcs_tear_mode - Tearing Effect Output Line mode
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* @MIPI_DSI_DCS_TEAR_MODE_VBLANK: the TE output line consists of V-Blanking
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* information only
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* @MIPI_DSI_DCS_TEAR_MODE_VHBLANK : the TE output line consists of both
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* V-Blanking and H-Blanking information
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*/
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enum mipi_dsi_dcs_tear_mode {
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MIPI_DSI_DCS_TEAR_MODE_VBLANK,
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MIPI_DSI_DCS_TEAR_MODE_VHBLANK,
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};
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#define MIPI_DSI_DCS_POWER_MODE_DISPLAY (1 << 2)
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#define MIPI_DSI_DCS_POWER_MODE_NORMAL (1 << 3)
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#define MIPI_DSI_DCS_POWER_MODE_SLEEP (1 << 4)
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#define MIPI_DSI_DCS_POWER_MODE_PARTIAL (1 << 5)
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#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,
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const void *data, size_t len);
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int mipi_dsi_dcs_write_buffer_chatty(struct mipi_dsi_device *dsi,
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const void *data, size_t len);
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void mipi_dsi_dcs_write_buffer_multi(struct mipi_dsi_multi_context *ctx,
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const void *data, size_t len);
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ssize_t mipi_dsi_dcs_write(struct mipi_dsi_device *dsi, u8 cmd,
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const void *data, 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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int mipi_dsi_dcs_nop(struct mipi_dsi_device *dsi);
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int mipi_dsi_dcs_soft_reset(struct mipi_dsi_device *dsi);
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int mipi_dsi_dcs_get_power_mode(struct mipi_dsi_device *dsi, u8 *mode);
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int mipi_dsi_dcs_get_pixel_format(struct mipi_dsi_device *dsi, u8 *format);
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int mipi_dsi_dcs_enter_sleep_mode(struct mipi_dsi_device *dsi);
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int mipi_dsi_dcs_exit_sleep_mode(struct mipi_dsi_device *dsi);
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int mipi_dsi_dcs_set_display_off(struct mipi_dsi_device *dsi);
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int mipi_dsi_dcs_set_display_on(struct mipi_dsi_device *dsi);
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int mipi_dsi_dcs_set_column_address(struct mipi_dsi_device *dsi, u16 start,
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u16 end);
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int mipi_dsi_dcs_set_page_address(struct mipi_dsi_device *dsi, u16 start,
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u16 end);
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int mipi_dsi_dcs_set_tear_off(struct mipi_dsi_device *dsi);
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int mipi_dsi_dcs_set_tear_on(struct mipi_dsi_device *dsi,
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enum mipi_dsi_dcs_tear_mode mode);
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int mipi_dsi_dcs_set_pixel_format(struct mipi_dsi_device *dsi, u8 format);
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int mipi_dsi_dcs_set_tear_scanline(struct mipi_dsi_device *dsi, u16 scanline);
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int mipi_dsi_dcs_set_display_brightness(struct mipi_dsi_device *dsi,
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u16 brightness);
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int mipi_dsi_dcs_get_display_brightness(struct mipi_dsi_device *dsi,
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u16 *brightness);
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int mipi_dsi_dcs_set_display_brightness_large(struct mipi_dsi_device *dsi,
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u16 brightness);
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int mipi_dsi_dcs_get_display_brightness_large(struct mipi_dsi_device *dsi,
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u16 *brightness);
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void mipi_dsi_dcs_nop_multi(struct mipi_dsi_multi_context *ctx);
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void mipi_dsi_dcs_enter_sleep_mode_multi(struct mipi_dsi_multi_context *ctx);
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void mipi_dsi_dcs_exit_sleep_mode_multi(struct mipi_dsi_multi_context *ctx);
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void mipi_dsi_dcs_set_display_off_multi(struct mipi_dsi_multi_context *ctx);
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void mipi_dsi_dcs_set_display_on_multi(struct mipi_dsi_multi_context *ctx);
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void mipi_dsi_dcs_set_tear_on_multi(struct mipi_dsi_multi_context *ctx,
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enum mipi_dsi_dcs_tear_mode mode);
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void mipi_dsi_turn_on_peripheral_multi(struct mipi_dsi_multi_context *ctx);
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void mipi_dsi_dcs_soft_reset_multi(struct mipi_dsi_multi_context *ctx);
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void mipi_dsi_dcs_set_display_brightness_multi(struct mipi_dsi_multi_context *ctx,
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u16 brightness);
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void mipi_dsi_dcs_set_pixel_format_multi(struct mipi_dsi_multi_context *ctx,
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u8 format);
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void mipi_dsi_dcs_set_column_address_multi(struct mipi_dsi_multi_context *ctx,
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u16 start, u16 end);
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void mipi_dsi_dcs_set_page_address_multi(struct mipi_dsi_multi_context *ctx,
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u16 start, u16 end);
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void mipi_dsi_dcs_set_tear_scanline_multi(struct mipi_dsi_multi_context *ctx,
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u16 scanline);
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/**
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* mipi_dsi_generic_write_seq - transmit data using a generic write packet
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*
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* This macro will print errors for you and will RETURN FROM THE CALLING
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* FUNCTION (yes this is non-intuitive) upon error.
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*
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* Because of the non-intuitive return behavior, THIS MACRO IS DEPRECATED.
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* Please replace calls of it with mipi_dsi_generic_write_seq_multi().
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*
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* @dsi: DSI peripheral device
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* @seq: buffer containing the payload
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*/
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#define mipi_dsi_generic_write_seq(dsi, seq...) \
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do { \
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static const u8 d[] = { seq }; \
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int ret; \
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ret = mipi_dsi_generic_write_chatty(dsi, d, ARRAY_SIZE(d)); \
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if (ret < 0) \
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return ret; \
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} while (0)
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/**
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* mipi_dsi_generic_write_seq_multi - transmit data using a generic write packet
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*
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* This macro will print errors for you and error handling is optimized for
|
|
* callers that call this multiple times in a row.
|
|
*
|
|
* @ctx: Context for multiple DSI transactions
|
|
* @seq: buffer containing the payload
|
|
*/
|
|
#define mipi_dsi_generic_write_seq_multi(ctx, seq...) \
|
|
do { \
|
|
static const u8 d[] = { seq }; \
|
|
mipi_dsi_generic_write_multi(ctx, d, ARRAY_SIZE(d)); \
|
|
} while (0)
|
|
|
|
/**
|
|
* mipi_dsi_dcs_write_seq - transmit a DCS command with payload
|
|
*
|
|
* This macro will print errors for you and will RETURN FROM THE CALLING
|
|
* FUNCTION (yes this is non-intuitive) upon error.
|
|
*
|
|
* Because of the non-intuitive return behavior, THIS MACRO IS DEPRECATED.
|
|
* Please replace calls of it with mipi_dsi_dcs_write_seq_multi().
|
|
*
|
|
* @dsi: DSI peripheral device
|
|
* @cmd: Command
|
|
* @seq: buffer containing data to be transmitted
|
|
*/
|
|
#define mipi_dsi_dcs_write_seq(dsi, cmd, seq...) \
|
|
do { \
|
|
static const u8 d[] = { cmd, seq }; \
|
|
int ret; \
|
|
ret = mipi_dsi_dcs_write_buffer_chatty(dsi, d, ARRAY_SIZE(d)); \
|
|
if (ret < 0) \
|
|
return ret; \
|
|
} while (0)
|
|
|
|
/**
|
|
* mipi_dsi_dcs_write_seq_multi - transmit a DCS command with payload
|
|
*
|
|
* This macro will print errors for you and error handling is optimized for
|
|
* callers that call this multiple times in a row.
|
|
*
|
|
* @ctx: Context for multiple DSI transactions
|
|
* @cmd: Command
|
|
* @seq: buffer containing data to be transmitted
|
|
*/
|
|
#define mipi_dsi_dcs_write_seq_multi(ctx, cmd, seq...) \
|
|
do { \
|
|
static const u8 d[] = { cmd, seq }; \
|
|
mipi_dsi_dcs_write_buffer_multi(ctx, d, ARRAY_SIZE(d)); \
|
|
} while (0)
|
|
|
|
/**
|
|
* 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);
|
|
void (*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__ */
|