1 /* SPDX-License-Identifier: GPL-2.0 */
5 * Copyright (C) 2012-2013, Samsung Electronics, Co., Ltd.
6 * Copyright (C) 2018 STMicroelectronics - All Rights Reserved
7 * Author(s): Andrzej Hajda <a.hajda@samsung.com>
8 * Yannick Fertre <yannick.fertre@st.com>
9 * Philippe Cornu <philippe.cornu@st.com>
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
18 #include <mipi_display.h>
19 #include <linux/bitops.h>
22 struct mipi_dsi_device;
24 /* request ACK from peripheral */
25 #define MIPI_DSI_MSG_REQ_ACK BIT(0)
26 /* use Low Power Mode to transmit message */
27 #define MIPI_DSI_MSG_USE_LPM BIT(1)
30 * struct mipi_dsi_msg - read/write DSI buffer
31 * @channel: virtual channel id
32 * @type: payload data type
33 * @flags: flags controlling this message transmission
34 * @tx_len: length of @tx_buf
35 * @tx_buf: data to be written
36 * @rx_len: length of @rx_buf
37 * @rx_buf: data to be read, or NULL
51 bool mipi_dsi_packet_format_is_short(u8 type);
52 bool mipi_dsi_packet_format_is_long(u8 type);
55 * struct mipi_dsi_packet - represents a MIPI DSI packet in protocol format
56 * @size: size (in bytes) of the packet
57 * @header: the four bytes that make up the header (Data ID, Word Count or
58 * Packet Data, and ECC)
59 * @payload_length: number of bytes in the payload
60 * @payload: a pointer to a buffer containing the payload, if any
62 struct mipi_dsi_packet {
65 size_t payload_length;
69 int mipi_dsi_create_packet(struct mipi_dsi_packet *packet,
70 const struct mipi_dsi_msg *msg);
73 * struct mipi_dsi_host_ops - DSI bus operations
74 * @attach: attach DSI device to DSI host
75 * @detach: detach DSI device from DSI host
76 * @transfer: transmit a DSI packet
78 * DSI packets transmitted by .transfer() are passed in as mipi_dsi_msg
79 * structures. This structure contains information about the type of packet
80 * being transmitted as well as the transmit and receive buffers. When an
81 * error is encountered during transmission, this function will return a
82 * negative error code. On success it shall return the number of bytes
83 * transmitted for write packets or the number of bytes received for read
86 * Note that typically DSI packet transmission is atomic, so the .transfer()
87 * function will seldomly return anything other than the number of bytes
88 * contained in the transmit buffer on success.
90 struct mipi_dsi_host_ops {
91 int (*attach)(struct mipi_dsi_host *host,
92 struct mipi_dsi_device *dsi);
93 int (*detach)(struct mipi_dsi_host *host,
94 struct mipi_dsi_device *dsi);
95 ssize_t (*transfer)(struct mipi_dsi_host *host,
96 const struct mipi_dsi_msg *msg);
100 * struct mipi_dsi_phy_timing - DSI host phy timings
101 * @data_hs2lp: High Speed to Low Speed Data Transition Time
102 * @data_lp2hs: Low Speed to High Speed Data Transition Time
103 * @clk_hs2lp: High Speed to Low Speed Clock Transition Time
104 * @clk_lp2hs: Low Speed to High Speed Clock Transition Time
106 struct mipi_dsi_phy_timing {
114 * struct mipi_dsi_phy_ops - DSI host physical operations
115 * @init: initialized host physical part
116 * @get_lane_mbps: get lane bitrate per lane (mbps)
117 * @post_set_mode: operation that should after set mode
119 struct mipi_dsi_phy_ops {
120 int (*init)(void *priv_data);
121 int (*get_lane_mbps)(void *priv_data, struct display_timing *timings,
122 u32 lanes, u32 format, unsigned int *lane_mbps);
123 void (*post_set_mode)(void *priv_data, unsigned long mode_flags);
124 int (*get_timing)(void *priv_data, unsigned int lane_mbps,
125 struct mipi_dsi_phy_timing *timing);
129 * struct mipi_dsi_host - DSI host device
130 * @dev: driver model device node for this DSI host
131 * @ops: DSI host operations
132 * @list: list management
134 struct mipi_dsi_host {
136 const struct mipi_dsi_host_ops *ops;
137 struct list_head list;
143 #define MIPI_DSI_MODE_VIDEO BIT(0)
144 /* video burst mode */
145 #define MIPI_DSI_MODE_VIDEO_BURST BIT(1)
146 /* video pulse mode */
147 #define MIPI_DSI_MODE_VIDEO_SYNC_PULSE BIT(2)
148 /* enable auto vertical count mode */
149 #define MIPI_DSI_MODE_VIDEO_AUTO_VERT BIT(3)
150 /* enable hsync-end packets in vsync-pulse and v-porch area */
151 #define MIPI_DSI_MODE_VIDEO_HSE BIT(4)
152 /* disable hfront-porch area */
153 #define MIPI_DSI_MODE_VIDEO_HFP BIT(5)
154 /* disable hback-porch area */
155 #define MIPI_DSI_MODE_VIDEO_HBP BIT(6)
156 /* disable hsync-active area */
157 #define MIPI_DSI_MODE_VIDEO_HSA BIT(7)
158 /* flush display FIFO on vsync pulse */
159 #define MIPI_DSI_MODE_VSYNC_FLUSH BIT(8)
160 /* disable EoT packets in HS mode */
161 #define MIPI_DSI_MODE_EOT_PACKET BIT(9)
162 /* device supports non-continuous clock behavior (DSI spec 5.6.1) */
163 #define MIPI_DSI_CLOCK_NON_CONTINUOUS BIT(10)
164 /* transmit data in low power */
165 #define MIPI_DSI_MODE_LPM BIT(11)
167 enum mipi_dsi_pixel_format {
170 MIPI_DSI_FMT_RGB666_PACKED,
174 #define DSI_DEV_NAME_SIZE 20
177 * struct mipi_dsi_device_info - template for creating a mipi_dsi_device
178 * @type: DSI peripheral chip type
179 * @channel: DSI virtual channel assigned to peripheral
180 * @node: pointer to OF device node or NULL
182 * This is populated and passed to mipi_dsi_device_new to create a new
185 struct mipi_dsi_device_info {
186 char type[DSI_DEV_NAME_SIZE];
188 struct device_node *node;
192 * struct mipi_dsi_device - DSI peripheral device
193 * @host: DSI host for this peripheral
194 * @dev: driver model device node for this peripheral
195 * @name: DSI peripheral chip type
196 * @channel: virtual channel assigned to the peripheral
197 * @format: pixel format for video mode
198 * @lanes: number of active data lanes
199 * @mode_flags: DSI operation mode related flags
201 struct mipi_dsi_device {
202 struct mipi_dsi_host *host;
205 char name[DSI_DEV_NAME_SIZE];
206 unsigned int channel;
208 enum mipi_dsi_pixel_format format;
209 unsigned long mode_flags;
213 * mipi_dsi_pixel_format_to_bpp - obtain the number of bits per pixel for any
214 * given pixel format defined by the MIPI DSI
216 * @fmt: MIPI DSI pixel format
218 * Returns: The number of bits per pixel of the given pixel format.
220 static inline int mipi_dsi_pixel_format_to_bpp(enum mipi_dsi_pixel_format fmt)
223 case MIPI_DSI_FMT_RGB888:
224 case MIPI_DSI_FMT_RGB666:
227 case MIPI_DSI_FMT_RGB666_PACKED:
230 case MIPI_DSI_FMT_RGB565:
238 * struct mipi_dsi_panel_plat - DSI panel platform data
239 * @device: DSI peripheral device
240 * @lanes: number of active data lanes
241 * @format: pixel format for video mode
242 * @mode_flags: DSI operation mode related flags
244 struct mipi_dsi_panel_plat {
245 struct mipi_dsi_device *device;
247 enum mipi_dsi_pixel_format format;
248 unsigned long mode_flags;
252 * mipi_dsi_attach - attach a DSI device to its DSI host
253 * @dsi: DSI peripheral
255 int mipi_dsi_attach(struct mipi_dsi_device *dsi);
258 * mipi_dsi_detach - detach a DSI device from its DSI host
259 * @dsi: DSI peripheral
261 int mipi_dsi_detach(struct mipi_dsi_device *dsi);
262 int mipi_dsi_shutdown_peripheral(struct mipi_dsi_device *dsi);
263 int mipi_dsi_turn_on_peripheral(struct mipi_dsi_device *dsi);
264 int mipi_dsi_set_maximum_return_packet_size(struct mipi_dsi_device *dsi,
267 ssize_t mipi_dsi_generic_write(struct mipi_dsi_device *dsi, const void *payload,
269 ssize_t mipi_dsi_generic_read(struct mipi_dsi_device *dsi, const void *params,
270 size_t num_params, void *data, size_t size);
273 * enum mipi_dsi_dcs_tear_mode - Tearing Effect Output Line mode
274 * @MIPI_DSI_DCS_TEAR_MODE_VBLANK: the TE output line consists of V-Blanking
276 * @MIPI_DSI_DCS_TEAR_MODE_VHBLANK : the TE output line consists of both
277 * V-Blanking and H-Blanking information
279 enum mipi_dsi_dcs_tear_mode {
280 MIPI_DSI_DCS_TEAR_MODE_VBLANK,
281 MIPI_DSI_DCS_TEAR_MODE_VHBLANK,
284 #define MIPI_DSI_DCS_POWER_MODE_DISPLAY BIT(2)
285 #define MIPI_DSI_DCS_POWER_MODE_NORMAL BIT(3)
286 #define MIPI_DSI_DCS_POWER_MODE_SLEEP BIT(4)
287 #define MIPI_DSI_DCS_POWER_MODE_PARTIAL BIT(5)
288 #define MIPI_DSI_DCS_POWER_MODE_IDLE BIT(6)
291 * mipi_dsi_dcs_write_buffer() - transmit a DCS command with payload
292 * @dsi: DSI peripheral device
293 * @data: buffer containing data to be transmitted
294 * @len: size of transmission buffer
296 * This function will automatically choose the right data type depending on
297 * the command payload length.
299 * Return: The number of bytes successfully transmitted or a negative error
302 ssize_t mipi_dsi_dcs_write_buffer(struct mipi_dsi_device *dsi,
303 const void *data, size_t len);
306 * mipi_dsi_dcs_write() - send DCS write command
307 * @dsi: DSI peripheral device
309 * @data: buffer containing the command payload
310 * @len: command payload length
312 * This function will automatically choose the right data type depending on
313 * the command payload length.
317 ssize_t mipi_dsi_dcs_write(struct mipi_dsi_device *dsi, u8 cmd,
318 const void *data, size_t len);
321 * mipi_dsi_dcs_read() - send DCS read request command
322 * @dsi: DSI peripheral device
324 * @data: buffer in which to receive data
325 * @len: size of receive buffer
327 * Return: The number of bytes read or a negative error code on failure.
329 ssize_t mipi_dsi_dcs_read(struct mipi_dsi_device *dsi, u8 cmd, void *data,
333 * mipi_dsi_dcs_nop() - send DCS nop packet
334 * @dsi: DSI peripheral device
336 * Return: 0 on success or a negative error code on failure.
338 int mipi_dsi_dcs_nop(struct mipi_dsi_device *dsi);
341 * mipi_dsi_dcs_soft_reset() - perform a software reset of the display module
342 * @dsi: DSI peripheral device
344 * Return: 0 on success or a negative error code on failure.
346 int mipi_dsi_dcs_soft_reset(struct mipi_dsi_device *dsi);
349 * mipi_dsi_dcs_get_power_mode() - query the display module's current power
351 * @dsi: DSI peripheral device
352 * @mode: return location for the current power mode
354 * Return: 0 on success or a negative error code on failure.
356 int mipi_dsi_dcs_get_power_mode(struct mipi_dsi_device *dsi, u8 *mode);
359 * mipi_dsi_dcs_get_pixel_format() - gets the pixel format for the RGB image
360 * data used by the interface
361 * @dsi: DSI peripheral device
362 * @format: return location for the pixel format
364 * Return: 0 on success or a negative error code on failure.
366 int mipi_dsi_dcs_get_pixel_format(struct mipi_dsi_device *dsi, u8 *format);
369 * mipi_dsi_dcs_enter_sleep_mode() - disable all unnecessary blocks inside the
370 * display module except interface communication
371 * @dsi: DSI peripheral device
373 * Return: 0 on success or a negative error code on failure.
375 int mipi_dsi_dcs_enter_sleep_mode(struct mipi_dsi_device *dsi);
378 * mipi_dsi_dcs_exit_sleep_mode() - enable all blocks inside the display
380 * @dsi: DSI peripheral device
382 * Return: 0 on success or a negative error code on failure.
384 int mipi_dsi_dcs_exit_sleep_mode(struct mipi_dsi_device *dsi);
387 * mipi_dsi_dcs_set_display_off() - stop displaying the image data on the
389 * @dsi: DSI peripheral device
391 * Return: 0 on success or a negative error code on failure.
393 int mipi_dsi_dcs_set_display_off(struct mipi_dsi_device *dsi);
396 * mipi_dsi_dcs_set_display_on() - start displaying the image data on the
398 * @dsi: DSI peripheral device
400 * Return: 0 on success or a negative error code on failure
402 int mipi_dsi_dcs_set_display_on(struct mipi_dsi_device *dsi);
405 * mipi_dsi_dcs_set_column_address() - define the column extent of the frame
406 * memory accessed by the host processor
407 * @dsi: DSI peripheral device
408 * @start: first column of frame memory
409 * @end: last column of frame memory
411 * Return: 0 on success or a negative error code on failure.
413 int mipi_dsi_dcs_set_column_address(struct mipi_dsi_device *dsi, u16 start,
416 * mipi_dsi_dcs_set_page_address() - define the page extent of the frame
417 * memory accessed by the host processor
418 * @dsi: DSI peripheral device
419 * @start: first page of frame memory
420 * @end: last page of frame memory
422 * Return: 0 on success or a negative error code on failure.
424 int mipi_dsi_dcs_set_page_address(struct mipi_dsi_device *dsi, u16 start,
428 * mipi_dsi_dcs_set_tear_off() - turn off the display module's Tearing Effect
429 * output signal on the TE signal line
430 * @dsi: DSI peripheral device
432 * Return: 0 on success or a negative error code on failure
434 int mipi_dsi_dcs_set_tear_off(struct mipi_dsi_device *dsi);
437 * mipi_dsi_dcs_set_tear_on() - turn on the display module's Tearing Effect
438 * output signal on the TE signal line.
439 * @dsi: DSI peripheral device
440 * @mode: the Tearing Effect Output Line mode
442 * Return: 0 on success or a negative error code on failure
444 int mipi_dsi_dcs_set_tear_on(struct mipi_dsi_device *dsi,
445 enum mipi_dsi_dcs_tear_mode mode);
448 * mipi_dsi_dcs_set_pixel_format() - sets the pixel format for the RGB image
449 * data used by the interface
450 * @dsi: DSI peripheral device
451 * @format: pixel format
453 * Return: 0 on success or a negative error code on failure.
455 int mipi_dsi_dcs_set_pixel_format(struct mipi_dsi_device *dsi, u8 format);
458 * mipi_dsi_dcs_set_tear_scanline() - set the scanline to use as trigger for
459 * the Tearing Effect output signal of the display module
460 * @dsi: DSI peripheral device
461 * @scanline: scanline to use as trigger
463 * Return: 0 on success or a negative error code on failure
465 int mipi_dsi_dcs_set_tear_scanline(struct mipi_dsi_device *dsi, u16 scanline);
468 * mipi_dsi_dcs_set_display_brightness() - sets the brightness value of the
470 * @dsi: DSI peripheral device
471 * @brightness: brightness value
473 * Return: 0 on success or a negative error code on failure.
475 int mipi_dsi_dcs_set_display_brightness(struct mipi_dsi_device *dsi,
479 * mipi_dsi_dcs_get_display_brightness() - gets the current brightness value
481 * @dsi: DSI peripheral device
482 * @brightness: brightness value
484 * Return: 0 on success or a negative error code on failure.
486 int mipi_dsi_dcs_get_display_brightness(struct mipi_dsi_device *dsi,
489 #endif /* MIPI_DSI_H */