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_ops - DSI host physical operations
101 * @init: initialized host physical part
102 * @get_lane_mbps: get lane bitrate per lane (mbps)
103 * @post_set_mode: operation that should after set mode
105 struct mipi_dsi_phy_ops {
106 int (*init)(void *priv_data);
107 int (*get_lane_mbps)(void *priv_data, struct display_timing *timings,
108 u32 lanes, u32 format, unsigned int *lane_mbps);
109 void (*post_set_mode)(void *priv_data, unsigned long mode_flags);
113 * struct mipi_dsi_host - DSI host device
114 * @dev: driver model device node for this DSI host
115 * @ops: DSI host operations
116 * @list: list management
118 struct mipi_dsi_host {
120 const struct mipi_dsi_host_ops *ops;
121 struct list_head list;
127 #define MIPI_DSI_MODE_VIDEO BIT(0)
128 /* video burst mode */
129 #define MIPI_DSI_MODE_VIDEO_BURST BIT(1)
130 /* video pulse mode */
131 #define MIPI_DSI_MODE_VIDEO_SYNC_PULSE BIT(2)
132 /* enable auto vertical count mode */
133 #define MIPI_DSI_MODE_VIDEO_AUTO_VERT BIT(3)
134 /* enable hsync-end packets in vsync-pulse and v-porch area */
135 #define MIPI_DSI_MODE_VIDEO_HSE BIT(4)
136 /* disable hfront-porch area */
137 #define MIPI_DSI_MODE_VIDEO_HFP BIT(5)
138 /* disable hback-porch area */
139 #define MIPI_DSI_MODE_VIDEO_HBP BIT(6)
140 /* disable hsync-active area */
141 #define MIPI_DSI_MODE_VIDEO_HSA BIT(7)
142 /* flush display FIFO on vsync pulse */
143 #define MIPI_DSI_MODE_VSYNC_FLUSH BIT(8)
144 /* disable EoT packets in HS mode */
145 #define MIPI_DSI_MODE_EOT_PACKET BIT(9)
146 /* device supports non-continuous clock behavior (DSI spec 5.6.1) */
147 #define MIPI_DSI_CLOCK_NON_CONTINUOUS BIT(10)
148 /* transmit data in low power */
149 #define MIPI_DSI_MODE_LPM BIT(11)
151 enum mipi_dsi_pixel_format {
154 MIPI_DSI_FMT_RGB666_PACKED,
158 #define DSI_DEV_NAME_SIZE 20
161 * struct mipi_dsi_device_info - template for creating a mipi_dsi_device
162 * @type: DSI peripheral chip type
163 * @channel: DSI virtual channel assigned to peripheral
164 * @node: pointer to OF device node or NULL
166 * This is populated and passed to mipi_dsi_device_new to create a new
169 struct mipi_dsi_device_info {
170 char type[DSI_DEV_NAME_SIZE];
172 struct device_node *node;
176 * struct mipi_dsi_device - DSI peripheral device
177 * @host: DSI host for this peripheral
178 * @dev: driver model device node for this peripheral
179 * @name: DSI peripheral chip type
180 * @channel: virtual channel assigned to the peripheral
181 * @format: pixel format for video mode
182 * @lanes: number of active data lanes
183 * @mode_flags: DSI operation mode related flags
185 struct mipi_dsi_device {
186 struct mipi_dsi_host *host;
189 char name[DSI_DEV_NAME_SIZE];
190 unsigned int channel;
192 enum mipi_dsi_pixel_format format;
193 unsigned long mode_flags;
197 * mipi_dsi_pixel_format_to_bpp - obtain the number of bits per pixel for any
198 * given pixel format defined by the MIPI DSI
200 * @fmt: MIPI DSI pixel format
202 * Returns: The number of bits per pixel of the given pixel format.
204 static inline int mipi_dsi_pixel_format_to_bpp(enum mipi_dsi_pixel_format fmt)
207 case MIPI_DSI_FMT_RGB888:
208 case MIPI_DSI_FMT_RGB666:
211 case MIPI_DSI_FMT_RGB666_PACKED:
214 case MIPI_DSI_FMT_RGB565:
222 * struct mipi_dsi_panel_plat - DSI panel platform data
223 * @device: DSI peripheral device
225 struct mipi_dsi_panel_plat {
226 struct mipi_dsi_device *device;
230 * mipi_dsi_attach - attach a DSI device to its DSI host
231 * @dsi: DSI peripheral
233 int mipi_dsi_attach(struct mipi_dsi_device *dsi);
236 * mipi_dsi_detach - detach a DSI device from its DSI host
237 * @dsi: DSI peripheral
239 int mipi_dsi_detach(struct mipi_dsi_device *dsi);
240 int mipi_dsi_shutdown_peripheral(struct mipi_dsi_device *dsi);
241 int mipi_dsi_turn_on_peripheral(struct mipi_dsi_device *dsi);
242 int mipi_dsi_set_maximum_return_packet_size(struct mipi_dsi_device *dsi,
245 ssize_t mipi_dsi_generic_write(struct mipi_dsi_device *dsi, const void *payload,
247 ssize_t mipi_dsi_generic_read(struct mipi_dsi_device *dsi, const void *params,
248 size_t num_params, void *data, size_t size);
251 * enum mipi_dsi_dcs_tear_mode - Tearing Effect Output Line mode
252 * @MIPI_DSI_DCS_TEAR_MODE_VBLANK: the TE output line consists of V-Blanking
254 * @MIPI_DSI_DCS_TEAR_MODE_VHBLANK : the TE output line consists of both
255 * V-Blanking and H-Blanking information
257 enum mipi_dsi_dcs_tear_mode {
258 MIPI_DSI_DCS_TEAR_MODE_VBLANK,
259 MIPI_DSI_DCS_TEAR_MODE_VHBLANK,
262 #define MIPI_DSI_DCS_POWER_MODE_DISPLAY BIT(2)
263 #define MIPI_DSI_DCS_POWER_MODE_NORMAL BIT(3)
264 #define MIPI_DSI_DCS_POWER_MODE_SLEEP BIT(4)
265 #define MIPI_DSI_DCS_POWER_MODE_PARTIAL BIT(5)
266 #define MIPI_DSI_DCS_POWER_MODE_IDLE BIT(6)
269 * mipi_dsi_dcs_write_buffer() - transmit a DCS command with payload
270 * @dsi: DSI peripheral device
271 * @data: buffer containing data to be transmitted
272 * @len: size of transmission buffer
274 * This function will automatically choose the right data type depending on
275 * the command payload length.
277 * Return: The number of bytes successfully transmitted or a negative error
280 ssize_t mipi_dsi_dcs_write_buffer(struct mipi_dsi_device *dsi,
281 const void *data, size_t len);
284 * mipi_dsi_dcs_write() - send DCS write command
285 * @dsi: DSI peripheral device
287 * @data: buffer containing the command payload
288 * @len: command payload length
290 * This function will automatically choose the right data type depending on
291 * the command payload length.
295 ssize_t mipi_dsi_dcs_write(struct mipi_dsi_device *dsi, u8 cmd,
296 const void *data, size_t len);
299 * mipi_dsi_dcs_read() - send DCS read request command
300 * @dsi: DSI peripheral device
302 * @data: buffer in which to receive data
303 * @len: size of receive buffer
305 * Return: The number of bytes read or a negative error code on failure.
307 ssize_t mipi_dsi_dcs_read(struct mipi_dsi_device *dsi, u8 cmd, void *data,
311 * mipi_dsi_dcs_nop() - send DCS nop packet
312 * @dsi: DSI peripheral device
314 * Return: 0 on success or a negative error code on failure.
316 int mipi_dsi_dcs_nop(struct mipi_dsi_device *dsi);
319 * mipi_dsi_dcs_soft_reset() - perform a software reset of the display module
320 * @dsi: DSI peripheral device
322 * Return: 0 on success or a negative error code on failure.
324 int mipi_dsi_dcs_soft_reset(struct mipi_dsi_device *dsi);
327 * mipi_dsi_dcs_get_power_mode() - query the display module's current power
329 * @dsi: DSI peripheral device
330 * @mode: return location for the current power mode
332 * Return: 0 on success or a negative error code on failure.
334 int mipi_dsi_dcs_get_power_mode(struct mipi_dsi_device *dsi, u8 *mode);
337 * mipi_dsi_dcs_get_pixel_format() - gets the pixel format for the RGB image
338 * data used by the interface
339 * @dsi: DSI peripheral device
340 * @format: return location for the pixel format
342 * Return: 0 on success or a negative error code on failure.
344 int mipi_dsi_dcs_get_pixel_format(struct mipi_dsi_device *dsi, u8 *format);
347 * mipi_dsi_dcs_enter_sleep_mode() - disable all unnecessary blocks inside the
348 * display module except interface communication
349 * @dsi: DSI peripheral device
351 * Return: 0 on success or a negative error code on failure.
353 int mipi_dsi_dcs_enter_sleep_mode(struct mipi_dsi_device *dsi);
356 * mipi_dsi_dcs_exit_sleep_mode() - enable all blocks inside the display
358 * @dsi: DSI peripheral device
360 * Return: 0 on success or a negative error code on failure.
362 int mipi_dsi_dcs_exit_sleep_mode(struct mipi_dsi_device *dsi);
365 * mipi_dsi_dcs_set_display_off() - stop displaying the image data on the
367 * @dsi: DSI peripheral device
369 * Return: 0 on success or a negative error code on failure.
371 int mipi_dsi_dcs_set_display_off(struct mipi_dsi_device *dsi);
374 * mipi_dsi_dcs_set_display_on() - start displaying the image data on the
376 * @dsi: DSI peripheral device
378 * Return: 0 on success or a negative error code on failure
380 int mipi_dsi_dcs_set_display_on(struct mipi_dsi_device *dsi);
383 * mipi_dsi_dcs_set_column_address() - define the column extent of the frame
384 * memory accessed by the host processor
385 * @dsi: DSI peripheral device
386 * @start: first column of frame memory
387 * @end: last column of frame memory
389 * Return: 0 on success or a negative error code on failure.
391 int mipi_dsi_dcs_set_column_address(struct mipi_dsi_device *dsi, u16 start,
394 * mipi_dsi_dcs_set_page_address() - define the page extent of the frame
395 * memory accessed by the host processor
396 * @dsi: DSI peripheral device
397 * @start: first page of frame memory
398 * @end: last page of frame memory
400 * Return: 0 on success or a negative error code on failure.
402 int mipi_dsi_dcs_set_page_address(struct mipi_dsi_device *dsi, u16 start,
406 * mipi_dsi_dcs_set_tear_off() - turn off the display module's Tearing Effect
407 * output signal on the TE signal line
408 * @dsi: DSI peripheral device
410 * Return: 0 on success or a negative error code on failure
412 int mipi_dsi_dcs_set_tear_off(struct mipi_dsi_device *dsi);
415 * mipi_dsi_dcs_set_tear_on() - turn on the display module's Tearing Effect
416 * output signal on the TE signal line.
417 * @dsi: DSI peripheral device
418 * @mode: the Tearing Effect Output Line mode
420 * Return: 0 on success or a negative error code on failure
422 int mipi_dsi_dcs_set_tear_on(struct mipi_dsi_device *dsi,
423 enum mipi_dsi_dcs_tear_mode mode);
426 * mipi_dsi_dcs_set_pixel_format() - sets the pixel format for the RGB image
427 * data used by the interface
428 * @dsi: DSI peripheral device
429 * @format: pixel format
431 * Return: 0 on success or a negative error code on failure.
433 int mipi_dsi_dcs_set_pixel_format(struct mipi_dsi_device *dsi, u8 format);
436 * mipi_dsi_dcs_set_tear_scanline() - set the scanline to use as trigger for
437 * the Tearing Effect output signal of the display module
438 * @dsi: DSI peripheral device
439 * @scanline: scanline to use as trigger
441 * Return: 0 on success or a negative error code on failure
443 int mipi_dsi_dcs_set_tear_scanline(struct mipi_dsi_device *dsi, u16 scanline);
446 * mipi_dsi_dcs_set_display_brightness() - sets the brightness value of the
448 * @dsi: DSI peripheral device
449 * @brightness: brightness value
451 * Return: 0 on success or a negative error code on failure.
453 int mipi_dsi_dcs_set_display_brightness(struct mipi_dsi_device *dsi,
457 * mipi_dsi_dcs_get_display_brightness() - gets the current brightness value
459 * @dsi: DSI peripheral device
460 * @brightness: brightness value
462 * Return: 0 on success or a negative error code on failure.
464 int mipi_dsi_dcs_get_display_brightness(struct mipi_dsi_device *dsi,
467 #endif /* MIPI_DSI_H */