drm/amd/powerplay: fix bug that get wrong polaris evv voltage.
[linux-2.6-block.git] / include / drm / drm_mipi_dsi.h
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1/*
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
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20/* 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
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25/**
26 * struct mipi_dsi_msg - read/write DSI buffer
27 * @channel: virtual channel id
28 * @type: payload data type
009081e0 29 * @flags: flags controlling this message transmission
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30 * @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;
1d96d4a6 38 u16 flags;
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39
40 size_t tx_len;
41 const void *tx_buf;
42
43 size_t rx_len;
44 void *rx_buf;
45};
46
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47bool mipi_dsi_packet_format_is_short(u8 type);
48bool mipi_dsi_packet_format_is_long(u8 type);
49
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50/**
51 * 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
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68/**
69 * struct mipi_dsi_host_ops - DSI bus operations
70 * @attach: attach DSI device to DSI host
71 * @detach: detach DSI device from DSI host
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72 * @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.
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85 */
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,
ed6ff40e 92 const struct mipi_dsi_msg *msg);
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93};
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
97b6ae50 99 * @list: list management
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100 */
101struct mipi_dsi_host {
102 struct device *dev;
103 const struct mipi_dsi_host_ops *ops;
97b6ae50 104 struct list_head list;
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105};
106
107int mipi_dsi_host_register(struct mipi_dsi_host *host);
108void mipi_dsi_host_unregister(struct mipi_dsi_host *host);
97b6ae50 109struct mipi_dsi_host *of_find_mipi_dsi_host_by_node(struct device_node *node);
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110
111/* DSI mode flags */
112
113/* video mode */
114#define MIPI_DSI_MODE_VIDEO BIT(0)
115/* video burst mode */
116#define MIPI_DSI_MODE_VIDEO_BURST BIT(1)
117/* video pulse mode */
118#define MIPI_DSI_MODE_VIDEO_SYNC_PULSE BIT(2)
119/* enable auto vertical count mode */
120#define MIPI_DSI_MODE_VIDEO_AUTO_VERT BIT(3)
121/* enable hsync-end packets in vsync-pulse and v-porch area */
122#define MIPI_DSI_MODE_VIDEO_HSE BIT(4)
123/* disable hfront-porch area */
124#define MIPI_DSI_MODE_VIDEO_HFP BIT(5)
125/* disable hback-porch area */
126#define MIPI_DSI_MODE_VIDEO_HBP BIT(6)
127/* disable hsync-active area */
128#define MIPI_DSI_MODE_VIDEO_HSA BIT(7)
129/* flush display FIFO on vsync pulse */
130#define MIPI_DSI_MODE_VSYNC_FLUSH BIT(8)
131/* disable EoT packets in HS mode */
132#define MIPI_DSI_MODE_EOT_PACKET BIT(9)
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133/* device supports non-continuous clock behavior (DSI spec 5.6.1) */
134#define MIPI_DSI_CLOCK_NON_CONTINUOUS BIT(10)
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135/* transmit data in low power */
136#define MIPI_DSI_MODE_LPM BIT(11)
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137
138enum mipi_dsi_pixel_format {
139 MIPI_DSI_FMT_RGB888,
140 MIPI_DSI_FMT_RGB666,
141 MIPI_DSI_FMT_RGB666_PACKED,
142 MIPI_DSI_FMT_RGB565,
143};
144
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145#define DSI_DEV_NAME_SIZE 20
146
147/**
c63ae8a9 148 * struct mipi_dsi_device_info - template for creating a mipi_dsi_device
bf4363ce 149 * @type: DSI peripheral chip type
c63ae8a9 150 * @channel: DSI virtual channel assigned to peripheral
bf4363ce 151 * @node: pointer to OF device node or NULL
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152 *
153 * This is populated and passed to mipi_dsi_device_new to create a new
154 * DSI device
155 */
156struct mipi_dsi_device_info {
bf4363ce 157 char type[DSI_DEV_NAME_SIZE];
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158 u32 channel;
159 struct device_node *node;
160};
161
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162/**
163 * struct mipi_dsi_device - DSI peripheral device
164 * @host: DSI host for this peripheral
165 * @dev: driver model device node for this peripheral
bf4363ce 166 * @name: DSI peripheral chip type
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167 * @channel: virtual channel assigned to the peripheral
168 * @format: pixel format for video mode
169 * @lanes: number of active data lanes
170 * @mode_flags: DSI operation mode related flags
171 */
172struct mipi_dsi_device {
173 struct mipi_dsi_host *host;
174 struct device dev;
175
bf4363ce 176 char name[DSI_DEV_NAME_SIZE];
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177 unsigned int channel;
178 unsigned int lanes;
179 enum mipi_dsi_pixel_format format;
180 unsigned long mode_flags;
181};
182
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183static inline struct mipi_dsi_device *to_mipi_dsi_device(struct device *dev)
184{
185 return container_of(dev, struct mipi_dsi_device, dev);
186}
068a0023 187
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188/**
189 * mipi_dsi_pixel_format_to_bpp - obtain the number of bits per pixel for any
190 * given pixel format defined by the MIPI DSI
191 * specification
192 * @fmt: MIPI DSI pixel format
193 *
194 * Returns: The number of bits per pixel of the given pixel format.
195 */
196static inline int mipi_dsi_pixel_format_to_bpp(enum mipi_dsi_pixel_format fmt)
197{
198 switch (fmt) {
199 case MIPI_DSI_FMT_RGB888:
200 case MIPI_DSI_FMT_RGB666:
201 return 24;
202
203 case MIPI_DSI_FMT_RGB666_PACKED:
204 return 18;
205
206 case MIPI_DSI_FMT_RGB565:
207 return 16;
208 }
209
210 return -EINVAL;
211}
212
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213struct mipi_dsi_device *
214mipi_dsi_device_register_full(struct mipi_dsi_host *host,
215 const struct mipi_dsi_device_info *info);
509e42ce 216void mipi_dsi_device_unregister(struct mipi_dsi_device *dsi);
3ef05924 217struct mipi_dsi_device *of_find_mipi_dsi_device_by_node(struct device_node *np);
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218int mipi_dsi_attach(struct mipi_dsi_device *dsi);
219int mipi_dsi_detach(struct mipi_dsi_device *dsi);
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220int mipi_dsi_shutdown_peripheral(struct mipi_dsi_device *dsi);
221int mipi_dsi_turn_on_peripheral(struct mipi_dsi_device *dsi);
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222int mipi_dsi_set_maximum_return_packet_size(struct mipi_dsi_device *dsi,
223 u16 value);
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224
225ssize_t mipi_dsi_generic_write(struct mipi_dsi_device *dsi, const void *payload,
226 size_t size);
227ssize_t mipi_dsi_generic_read(struct mipi_dsi_device *dsi, const void *params,
228 size_t num_params, void *data, size_t size);
229
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230/**
231 * enum mipi_dsi_dcs_tear_mode - Tearing Effect Output Line mode
232 * @MIPI_DSI_DCS_TEAR_MODE_VBLANK: the TE output line consists of V-Blanking
233 * information only
234 * @MIPI_DSI_DCS_TEAR_MODE_VHBLANK : the TE output line consists of both
235 * V-Blanking and H-Blanking information
236 */
237enum mipi_dsi_dcs_tear_mode {
238 MIPI_DSI_DCS_TEAR_MODE_VBLANK,
239 MIPI_DSI_DCS_TEAR_MODE_VHBLANK,
240};
241
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242#define MIPI_DSI_DCS_POWER_MODE_DISPLAY (1 << 2)
243#define MIPI_DSI_DCS_POWER_MODE_NORMAL (1 << 3)
244#define MIPI_DSI_DCS_POWER_MODE_SLEEP (1 << 4)
245#define MIPI_DSI_DCS_POWER_MODE_PARTIAL (1 << 5)
246#define MIPI_DSI_DCS_POWER_MODE_IDLE (1 << 6)
247
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248ssize_t mipi_dsi_dcs_write_buffer(struct mipi_dsi_device *dsi,
249 const void *data, size_t len);
250ssize_t mipi_dsi_dcs_write(struct mipi_dsi_device *dsi, u8 cmd,
251 const void *data, size_t len);
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252ssize_t mipi_dsi_dcs_read(struct mipi_dsi_device *dsi, u8 cmd, void *data,
253 size_t len);
083d573f 254int mipi_dsi_dcs_nop(struct mipi_dsi_device *dsi);
2f16b897 255int mipi_dsi_dcs_soft_reset(struct mipi_dsi_device *dsi);
3d9a8fcf 256int mipi_dsi_dcs_get_power_mode(struct mipi_dsi_device *dsi, u8 *mode);
5cc0af16 257int mipi_dsi_dcs_get_pixel_format(struct mipi_dsi_device *dsi, u8 *format);
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258int mipi_dsi_dcs_enter_sleep_mode(struct mipi_dsi_device *dsi);
259int mipi_dsi_dcs_exit_sleep_mode(struct mipi_dsi_device *dsi);
260int mipi_dsi_dcs_set_display_off(struct mipi_dsi_device *dsi);
261int mipi_dsi_dcs_set_display_on(struct mipi_dsi_device *dsi);
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262int mipi_dsi_dcs_set_column_address(struct mipi_dsi_device *dsi, u16 start,
263 u16 end);
264int mipi_dsi_dcs_set_page_address(struct mipi_dsi_device *dsi, u16 start,
265 u16 end);
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266int mipi_dsi_dcs_set_tear_off(struct mipi_dsi_device *dsi);
267int mipi_dsi_dcs_set_tear_on(struct mipi_dsi_device *dsi,
268 enum mipi_dsi_dcs_tear_mode mode);
5cc0af16 269int mipi_dsi_dcs_set_pixel_format(struct mipi_dsi_device *dsi, u8 format);
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270
271/**
272 * struct mipi_dsi_driver - DSI driver
273 * @driver: device driver model driver
274 * @probe: callback for device binding
275 * @remove: callback for device unbinding
d1621803 276 * @shutdown: called at shutdown time to quiesce the device
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277 */
278struct mipi_dsi_driver {
279 struct device_driver driver;
280 int(*probe)(struct mipi_dsi_device *dsi);
281 int(*remove)(struct mipi_dsi_device *dsi);
d1621803 282 void (*shutdown)(struct mipi_dsi_device *dsi);
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283};
284
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285static inline struct mipi_dsi_driver *
286to_mipi_dsi_driver(struct device_driver *driver)
287{
288 return container_of(driver, struct mipi_dsi_driver, driver);
289}
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290
291static inline void *mipi_dsi_get_drvdata(const struct mipi_dsi_device *dsi)
292{
293 return dev_get_drvdata(&dsi->dev);
294}
295
296static inline void mipi_dsi_set_drvdata(struct mipi_dsi_device *dsi, void *data)
297{
298 dev_set_drvdata(&dsi->dev, data);
299}
300
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301int mipi_dsi_driver_register_full(struct mipi_dsi_driver *driver,
302 struct module *owner);
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303void mipi_dsi_driver_unregister(struct mipi_dsi_driver *driver);
304
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305#define mipi_dsi_driver_register(driver) \
306 mipi_dsi_driver_register_full(driver, THIS_MODULE)
307
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308#define module_mipi_dsi_driver(__mipi_dsi_driver) \
309 module_driver(__mipi_dsi_driver, mipi_dsi_driver_register, \
310 mipi_dsi_driver_unregister)
311
312#endif /* __DRM_MIPI_DSI__ */