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Andrzej Hajda068a0022013-12-04 16:35:12 +01001/*
2 * MIPI DSI Bus
3 *
4 * Copyright (C) 2012-2013, Samsung Electronics, Co., Ltd.
5 * Andrzej Hajda <a.hajda@samsung.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11
12#ifndef __DRM_MIPI_DSI_H__
13#define __DRM_MIPI_DSI_H__
14
15#include <linux/device.h>
16
17struct mipi_dsi_host;
18struct mipi_dsi_device;
19
Andrzej Hajda1d96d4a2014-03-28 12:52:36 +010020/* request ACK from peripheral */
21#define MIPI_DSI_MSG_REQ_ACK BIT(0)
22/* use Low Power Mode to transmit message */
23#define MIPI_DSI_MSG_USE_LPM BIT(1)
24
Andrzej Hajda068a0022013-12-04 16:35:12 +010025/**
26 * struct mipi_dsi_msg - read/write DSI buffer
27 * @channel: virtual channel id
28 * @type: payload data type
Thierry Reding009081e2014-08-05 10:41:13 +020029 * @flags: flags controlling this message transmission
Andrzej Hajda068a0022013-12-04 16:35:12 +010030 * @tx_len: length of @tx_buf
31 * @tx_buf: data to be written
32 * @rx_len: length of @rx_buf
33 * @rx_buf: data to be read, or NULL
34 */
35struct mipi_dsi_msg {
36 u8 channel;
37 u8 type;
Andrzej Hajda1d96d4a2014-03-28 12:52:36 +010038 u16 flags;
Andrzej Hajda068a0022013-12-04 16:35:12 +010039
40 size_t tx_len;
41 const void *tx_buf;
42
43 size_t rx_len;
44 void *rx_buf;
45};
46
Thierry Reding02acb762014-11-04 14:59:14 +010047bool mipi_dsi_packet_format_is_short(u8 type);
48bool mipi_dsi_packet_format_is_long(u8 type);
49
Andrzej Hajda068a0022013-12-04 16:35:12 +010050/**
Thierry Redinga52879e2014-10-16 13:44:02 +020051 * struct mipi_dsi_packet - represents a MIPI DSI packet in protocol format
52 * @size: size (in bytes) of the packet
53 * @header: the four bytes that make up the header (Data ID, Word Count or
54 * Packet Data, and ECC)
55 * @payload_length: number of bytes in the payload
56 * @payload: a pointer to a buffer containing the payload, if any
57 */
58struct mipi_dsi_packet {
59 size_t size;
60 u8 header[4];
61 size_t payload_length;
62 const u8 *payload;
63};
64
65int mipi_dsi_create_packet(struct mipi_dsi_packet *packet,
66 const struct mipi_dsi_msg *msg);
67
68/**
Andrzej Hajda068a0022013-12-04 16:35:12 +010069 * struct mipi_dsi_host_ops - DSI bus operations
70 * @attach: attach DSI device to DSI host
71 * @detach: detach DSI device from DSI host
Thierry Reding009081e2014-08-05 10:41:13 +020072 * @transfer: transmit a DSI packet
73 *
74 * DSI packets transmitted by .transfer() are passed in as mipi_dsi_msg
75 * structures. This structure contains information about the type of packet
76 * being transmitted as well as the transmit and receive buffers. When an
77 * error is encountered during transmission, this function will return a
78 * negative error code. On success it shall return the number of bytes
79 * transmitted for write packets or the number of bytes received for read
80 * packets.
81 *
82 * Note that typically DSI packet transmission is atomic, so the .transfer()
83 * function will seldomly return anything other than the number of bytes
84 * contained in the transmit buffer on success.
Andrzej Hajda068a0022013-12-04 16:35:12 +010085 */
86struct mipi_dsi_host_ops {
87 int (*attach)(struct mipi_dsi_host *host,
88 struct mipi_dsi_device *dsi);
89 int (*detach)(struct mipi_dsi_host *host,
90 struct mipi_dsi_device *dsi);
91 ssize_t (*transfer)(struct mipi_dsi_host *host,
Thierry Redinged6ff402014-08-05 11:27:56 +020092 const struct mipi_dsi_msg *msg);
Andrzej Hajda068a0022013-12-04 16:35:12 +010093};
94
95/**
96 * struct mipi_dsi_host - DSI host device
97 * @dev: driver model device node for this DSI host
98 * @ops: DSI host operations
99 */
100struct mipi_dsi_host {
101 struct device *dev;
102 const struct mipi_dsi_host_ops *ops;
103};
104
105int mipi_dsi_host_register(struct mipi_dsi_host *host);
106void mipi_dsi_host_unregister(struct mipi_dsi_host *host);
107
108/* DSI mode flags */
109
110/* video mode */
111#define MIPI_DSI_MODE_VIDEO BIT(0)
112/* video burst mode */
113#define MIPI_DSI_MODE_VIDEO_BURST BIT(1)
114/* video pulse mode */
115#define MIPI_DSI_MODE_VIDEO_SYNC_PULSE BIT(2)
116/* enable auto vertical count mode */
117#define MIPI_DSI_MODE_VIDEO_AUTO_VERT BIT(3)
118/* enable hsync-end packets in vsync-pulse and v-porch area */
119#define MIPI_DSI_MODE_VIDEO_HSE BIT(4)
120/* disable hfront-porch area */
121#define MIPI_DSI_MODE_VIDEO_HFP BIT(5)
122/* disable hback-porch area */
123#define MIPI_DSI_MODE_VIDEO_HBP BIT(6)
124/* disable hsync-active area */
125#define MIPI_DSI_MODE_VIDEO_HSA BIT(7)
126/* flush display FIFO on vsync pulse */
127#define MIPI_DSI_MODE_VSYNC_FLUSH BIT(8)
128/* disable EoT packets in HS mode */
129#define MIPI_DSI_MODE_EOT_PACKET BIT(9)
Alexandre Courbot884d6a02014-07-08 21:32:11 +0900130/* device supports non-continuous clock behavior (DSI spec 5.6.1) */
131#define MIPI_DSI_CLOCK_NON_CONTINUOUS BIT(10)
Inki Daed87f09a2014-08-13 16:38:23 +0900132/* transmit data in low power */
133#define MIPI_DSI_MODE_LPM BIT(11)
Andrzej Hajda068a0022013-12-04 16:35:12 +0100134
135enum mipi_dsi_pixel_format {
136 MIPI_DSI_FMT_RGB888,
137 MIPI_DSI_FMT_RGB666,
138 MIPI_DSI_FMT_RGB666_PACKED,
139 MIPI_DSI_FMT_RGB565,
140};
141
142/**
143 * struct mipi_dsi_device - DSI peripheral device
144 * @host: DSI host for this peripheral
145 * @dev: driver model device node for this peripheral
146 * @channel: virtual channel assigned to the peripheral
147 * @format: pixel format for video mode
148 * @lanes: number of active data lanes
149 * @mode_flags: DSI operation mode related flags
150 */
151struct mipi_dsi_device {
152 struct mipi_dsi_host *host;
153 struct device dev;
154
155 unsigned int channel;
156 unsigned int lanes;
157 enum mipi_dsi_pixel_format format;
158 unsigned long mode_flags;
159};
160
Thierry Reding77df01d2014-08-05 09:01:32 +0200161static inline struct mipi_dsi_device *to_mipi_dsi_device(struct device *dev)
162{
163 return container_of(dev, struct mipi_dsi_device, dev);
164}
Andrzej Hajda068a0022013-12-04 16:35:12 +0100165
Thierry Reding3ef05922014-08-06 08:53:39 +0200166struct mipi_dsi_device *of_find_mipi_dsi_device_by_node(struct device_node *np);
Andrzej Hajda068a0022013-12-04 16:35:12 +0100167int mipi_dsi_attach(struct mipi_dsi_device *dsi);
168int mipi_dsi_detach(struct mipi_dsi_device *dsi);
YoungJun Chodbf30b62014-08-05 09:27:15 +0200169int mipi_dsi_set_maximum_return_packet_size(struct mipi_dsi_device *dsi,
170 u16 value);
Thierry Reding550ab842014-08-05 10:36:21 +0200171
172ssize_t mipi_dsi_generic_write(struct mipi_dsi_device *dsi, const void *payload,
173 size_t size);
174ssize_t mipi_dsi_generic_read(struct mipi_dsi_device *dsi, const void *params,
175 size_t num_params, void *data, size_t size);
176
YoungJun Cho42fe1e72014-08-05 10:38:31 +0200177/**
178 * enum mipi_dsi_dcs_tear_mode - Tearing Effect Output Line mode
179 * @MIPI_DSI_DCS_TEAR_MODE_VBLANK: the TE output line consists of V-Blanking
180 * information only
181 * @MIPI_DSI_DCS_TEAR_MODE_VHBLANK : the TE output line consists of both
182 * V-Blanking and H-Blanking information
183 */
184enum mipi_dsi_dcs_tear_mode {
185 MIPI_DSI_DCS_TEAR_MODE_VBLANK,
186 MIPI_DSI_DCS_TEAR_MODE_VHBLANK,
187};
188
Thierry Reding3d9a8fc2014-08-05 11:17:06 +0200189#define MIPI_DSI_DCS_POWER_MODE_DISPLAY (1 << 2)
190#define MIPI_DSI_DCS_POWER_MODE_NORMAL (1 << 3)
191#define MIPI_DSI_DCS_POWER_MODE_SLEEP (1 << 4)
192#define MIPI_DSI_DCS_POWER_MODE_PARTIAL (1 << 5)
193#define MIPI_DSI_DCS_POWER_MODE_IDLE (1 << 6)
194
Thierry Reding960dd612014-07-21 15:47:10 +0200195ssize_t mipi_dsi_dcs_write_buffer(struct mipi_dsi_device *dsi,
196 const void *data, size_t len);
197ssize_t mipi_dsi_dcs_write(struct mipi_dsi_device *dsi, u8 cmd,
198 const void *data, size_t len);
Thierry Reding3c523d72014-07-21 12:28:25 +0200199ssize_t mipi_dsi_dcs_read(struct mipi_dsi_device *dsi, u8 cmd, void *data,
200 size_t len);
Thierry Reding083d5732014-08-05 11:14:02 +0200201int mipi_dsi_dcs_nop(struct mipi_dsi_device *dsi);
Thierry Reding2f16b892014-08-05 11:15:15 +0200202int mipi_dsi_dcs_soft_reset(struct mipi_dsi_device *dsi);
Thierry Reding3d9a8fc2014-08-05 11:17:06 +0200203int mipi_dsi_dcs_get_power_mode(struct mipi_dsi_device *dsi, u8 *mode);
Thierry Reding5cc0af12014-08-05 11:18:46 +0200204int mipi_dsi_dcs_get_pixel_format(struct mipi_dsi_device *dsi, u8 *format);
YoungJun Cho42fe1e72014-08-05 10:38:31 +0200205int mipi_dsi_dcs_enter_sleep_mode(struct mipi_dsi_device *dsi);
206int mipi_dsi_dcs_exit_sleep_mode(struct mipi_dsi_device *dsi);
207int mipi_dsi_dcs_set_display_off(struct mipi_dsi_device *dsi);
208int mipi_dsi_dcs_set_display_on(struct mipi_dsi_device *dsi);
Thierry Reding3b46d4a2014-08-05 11:20:25 +0200209int mipi_dsi_dcs_set_column_address(struct mipi_dsi_device *dsi, u16 start,
210 u16 end);
211int mipi_dsi_dcs_set_page_address(struct mipi_dsi_device *dsi, u16 start,
212 u16 end);
YoungJun Cho42fe1e72014-08-05 10:38:31 +0200213int mipi_dsi_dcs_set_tear_off(struct mipi_dsi_device *dsi);
214int mipi_dsi_dcs_set_tear_on(struct mipi_dsi_device *dsi,
215 enum mipi_dsi_dcs_tear_mode mode);
Thierry Reding5cc0af12014-08-05 11:18:46 +0200216int mipi_dsi_dcs_set_pixel_format(struct mipi_dsi_device *dsi, u8 format);
Andrzej Hajda068a0022013-12-04 16:35:12 +0100217
218/**
219 * struct mipi_dsi_driver - DSI driver
220 * @driver: device driver model driver
221 * @probe: callback for device binding
222 * @remove: callback for device unbinding
Thierry Redingd1621802014-04-29 17:19:57 +0200223 * @shutdown: called at shutdown time to quiesce the device
Andrzej Hajda068a0022013-12-04 16:35:12 +0100224 */
225struct mipi_dsi_driver {
226 struct device_driver driver;
227 int(*probe)(struct mipi_dsi_device *dsi);
228 int(*remove)(struct mipi_dsi_device *dsi);
Thierry Redingd1621802014-04-29 17:19:57 +0200229 void (*shutdown)(struct mipi_dsi_device *dsi);
Andrzej Hajda068a0022013-12-04 16:35:12 +0100230};
231
Thierry Reding77df01d2014-08-05 09:01:32 +0200232static inline struct mipi_dsi_driver *
233to_mipi_dsi_driver(struct device_driver *driver)
234{
235 return container_of(driver, struct mipi_dsi_driver, driver);
236}
Andrzej Hajda068a0022013-12-04 16:35:12 +0100237
238static inline void *mipi_dsi_get_drvdata(const struct mipi_dsi_device *dsi)
239{
240 return dev_get_drvdata(&dsi->dev);
241}
242
243static inline void mipi_dsi_set_drvdata(struct mipi_dsi_device *dsi, void *data)
244{
245 dev_set_drvdata(&dsi->dev, data);
246}
247
Thierry Reding99035e92014-11-04 16:09:56 +0100248int mipi_dsi_driver_register_full(struct mipi_dsi_driver *driver,
249 struct module *owner);
Andrzej Hajda068a0022013-12-04 16:35:12 +0100250void mipi_dsi_driver_unregister(struct mipi_dsi_driver *driver);
251
Thierry Reding99035e92014-11-04 16:09:56 +0100252#define mipi_dsi_driver_register(driver) \
253 mipi_dsi_driver_register_full(driver, THIS_MODULE)
254
Andrzej Hajda068a0022013-12-04 16:35:12 +0100255#define module_mipi_dsi_driver(__mipi_dsi_driver) \
256 module_driver(__mipi_dsi_driver, mipi_dsi_driver_register, \
257 mipi_dsi_driver_unregister)
258
259#endif /* __DRM_MIPI_DSI__ */