1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * MIPI DSI Bus 4 * 5 * Copyright (C) 2012-2013, Samsung Electronics, Co., Ltd. 6 * Andrzej Hajda <a.hajda@samsung.com> 7 */ 8 9 #ifndef __DRM_MIPI_DSI_H__ 10 #define __DRM_MIPI_DSI_H__ 11 12 #include <linux/device.h> 13 #include <linux/delay.h> 14 15 struct mipi_dsi_host; 16 struct mipi_dsi_device; 17 struct drm_dsc_picture_parameter_set; 18 19 /* request ACK from peripheral */ 20 #define MIPI_DSI_MSG_REQ_ACK BIT(0) 21 /* use Low Power Mode to transmit message */ 22 #define MIPI_DSI_MSG_USE_LPM BIT(1) 23 24 /** 25 * struct mipi_dsi_msg - read/write DSI buffer 26 * @channel: virtual channel id 27 * @type: payload data type 28 * @flags: flags controlling this message transmission 29 * @tx_len: length of @tx_buf 30 * @tx_buf: data to be written 31 * @rx_len: length of @rx_buf 32 * @rx_buf: data to be read, or NULL 33 */ 34 struct mipi_dsi_msg { 35 u8 channel; 36 u8 type; 37 u16 flags; 38 39 size_t tx_len; 40 const void *tx_buf; 41 42 size_t rx_len; 43 void *rx_buf; 44 }; 45 46 bool mipi_dsi_packet_format_is_short(u8 type); 47 bool mipi_dsi_packet_format_is_long(u8 type); 48 49 /** 50 * struct mipi_dsi_packet - represents a MIPI DSI packet in protocol format 51 * @size: size (in bytes) of the packet 52 * @header: the four bytes that make up the header (Data ID, Word Count or 53 * Packet Data, and ECC) 54 * @payload_length: number of bytes in the payload 55 * @payload: a pointer to a buffer containing the payload, if any 56 */ 57 struct mipi_dsi_packet { 58 size_t size; 59 u8 header[4]; 60 size_t payload_length; 61 const u8 *payload; 62 }; 63 64 int mipi_dsi_create_packet(struct mipi_dsi_packet *packet, 65 const struct mipi_dsi_msg *msg); 66 67 /** 68 * struct mipi_dsi_host_ops - DSI bus operations 69 * @attach: attach DSI device to DSI host 70 * @detach: detach DSI device from DSI host 71 * @transfer: transmit a DSI packet 72 * 73 * DSI packets transmitted by .transfer() are passed in as mipi_dsi_msg 74 * structures. This structure contains information about the type of packet 75 * being transmitted as well as the transmit and receive buffers. When an 76 * error is encountered during transmission, this function will return a 77 * negative error code. On success it shall return the number of bytes 78 * transmitted for write packets or the number of bytes received for read 79 * packets. 80 * 81 * Note that typically DSI packet transmission is atomic, so the .transfer() 82 * function will seldomly return anything other than the number of bytes 83 * contained in the transmit buffer on success. 84 * 85 * Also note that those callbacks can be called no matter the state the 86 * host is in. Drivers that need the underlying device to be powered to 87 * perform these operations will first need to make sure it's been 88 * properly enabled. 89 */ 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); 97 }; 98 99 /** 100 * struct mipi_dsi_host - DSI host device 101 * @dev: driver model device node for this DSI host 102 * @ops: DSI host operations 103 * @list: list management 104 */ 105 struct mipi_dsi_host { 106 struct device *dev; 107 const struct mipi_dsi_host_ops *ops; 108 struct list_head list; 109 }; 110 111 int mipi_dsi_host_register(struct mipi_dsi_host *host); 112 void mipi_dsi_host_unregister(struct mipi_dsi_host *host); 113 struct mipi_dsi_host *of_find_mipi_dsi_host_by_node(struct device_node *node); 114 115 /* DSI mode flags */ 116 117 /* video mode */ 118 #define MIPI_DSI_MODE_VIDEO BIT(0) 119 /* video burst mode */ 120 #define MIPI_DSI_MODE_VIDEO_BURST BIT(1) 121 /* video pulse mode */ 122 #define MIPI_DSI_MODE_VIDEO_SYNC_PULSE BIT(2) 123 /* enable auto vertical count mode */ 124 #define MIPI_DSI_MODE_VIDEO_AUTO_VERT BIT(3) 125 /* enable hsync-end packets in vsync-pulse and v-porch area */ 126 #define MIPI_DSI_MODE_VIDEO_HSE BIT(4) 127 /* disable hfront-porch area */ 128 #define MIPI_DSI_MODE_VIDEO_NO_HFP BIT(5) 129 /* disable hback-porch area */ 130 #define MIPI_DSI_MODE_VIDEO_NO_HBP BIT(6) 131 /* disable hsync-active area */ 132 #define MIPI_DSI_MODE_VIDEO_NO_HSA BIT(7) 133 /* disable EoT packets in HS mode */ 134 #define MIPI_DSI_MODE_NO_EOT_PACKET BIT(9) 135 /* device supports non-continuous clock behavior (DSI spec 5.6.1) */ 136 #define MIPI_DSI_CLOCK_NON_CONTINUOUS BIT(10) 137 /* transmit data in low power */ 138 #define MIPI_DSI_MODE_LPM BIT(11) 139 /* transmit data ending at the same time for all lanes within one hsync */ 140 #define MIPI_DSI_HS_PKT_END_ALIGNED BIT(12) 141 /* pack all DSC slices for a line into a single packet */ 142 #define MIPI_DSI_MODE_DSC_ALL_SLICES_IN_PKT BIT(13) 143 144 enum mipi_dsi_pixel_format { 145 MIPI_DSI_FMT_RGB888, 146 MIPI_DSI_FMT_RGB666, 147 MIPI_DSI_FMT_RGB666_PACKED, 148 MIPI_DSI_FMT_RGB565, 149 MIPI_DSI_FMT_RGB101010, 150 }; 151 152 #define DSI_DEV_NAME_SIZE 20 153 154 /** 155 * struct mipi_dsi_device_info - template for creating a mipi_dsi_device 156 * @type: DSI peripheral chip type 157 * @channel: DSI virtual channel assigned to peripheral 158 * @node: pointer to OF device node or NULL 159 * 160 * This is populated and passed to mipi_dsi_device_new to create a new 161 * DSI device 162 */ 163 struct mipi_dsi_device_info { 164 char type[DSI_DEV_NAME_SIZE]; 165 u32 channel; 166 struct device_node *node; 167 }; 168 169 /** 170 * struct mipi_dsi_device - DSI peripheral device 171 * @host: DSI host for this peripheral 172 * @dev: driver model device node for this peripheral 173 * @attached: the DSI device has been successfully attached 174 * @name: DSI peripheral chip type 175 * @channel: virtual channel assigned to the peripheral 176 * @format: pixel format for video mode 177 * @lanes: number of active data lanes 178 * @mode_flags: DSI operation mode related flags 179 * @hs_rate: maximum lane frequency for high speed mode in hertz, this should 180 * be set to the real limits of the hardware, zero is only accepted for 181 * legacy drivers 182 * @lp_rate: maximum lane frequency for low power mode in hertz, this should 183 * be set to the real limits of the hardware, zero is only accepted for 184 * legacy drivers 185 * @dsc: panel/bridge DSC pps payload to be sent 186 */ 187 struct mipi_dsi_device { 188 struct mipi_dsi_host *host; 189 struct device dev; 190 bool attached; 191 192 char name[DSI_DEV_NAME_SIZE]; 193 unsigned int channel; 194 unsigned int lanes; 195 enum mipi_dsi_pixel_format format; 196 unsigned long mode_flags; 197 unsigned long hs_rate; 198 unsigned long lp_rate; 199 struct drm_dsc_config *dsc; 200 }; 201 202 /** 203 * struct mipi_dsi_multi_context - Context to call multiple MIPI DSI funcs in a row 204 */ 205 struct mipi_dsi_multi_context { 206 /** 207 * @dsi: Pointer to the MIPI DSI device 208 */ 209 struct mipi_dsi_device *dsi; 210 211 /** 212 * @accum_err: Storage for the accumulated error over the multiple calls 213 * 214 * Init to 0. If a function encounters an error then the error code 215 * will be stored here. If you call a function and this points to a 216 * non-zero value then the function will be a noop. This allows calling 217 * a function many times in a row and just checking the error at the 218 * end to see if any of them failed. 219 */ 220 int accum_err; 221 }; 222 223 #define MIPI_DSI_MODULE_PREFIX "mipi-dsi:" 224 225 #define to_mipi_dsi_device(__dev) container_of_const(__dev, struct mipi_dsi_device, dev) 226 227 extern const struct bus_type mipi_dsi_bus_type; 228 #define dev_is_mipi_dsi(dev) ((dev)->bus == &mipi_dsi_bus_type) 229 230 /** 231 * mipi_dsi_pixel_format_to_bpp - obtain the number of bits per pixel for any 232 * given pixel format defined by the MIPI DSI 233 * specification 234 * @fmt: MIPI DSI pixel format 235 * 236 * Returns: The number of bits per pixel of the given pixel format. 237 */ 238 static inline int mipi_dsi_pixel_format_to_bpp(enum mipi_dsi_pixel_format fmt) 239 { 240 switch (fmt) { 241 case MIPI_DSI_FMT_RGB101010: 242 return 30; 243 244 case MIPI_DSI_FMT_RGB888: 245 case MIPI_DSI_FMT_RGB666: 246 return 24; 247 248 case MIPI_DSI_FMT_RGB666_PACKED: 249 return 18; 250 251 case MIPI_DSI_FMT_RGB565: 252 return 16; 253 } 254 255 return -EINVAL; 256 } 257 258 enum mipi_dsi_compression_algo { 259 MIPI_DSI_COMPRESSION_DSC = 0, 260 MIPI_DSI_COMPRESSION_VENDOR = 3, 261 /* other two values are reserved, DSI 1.3 */ 262 }; 263 264 struct mipi_dsi_device * 265 mipi_dsi_device_register_full(struct mipi_dsi_host *host, 266 const struct mipi_dsi_device_info *info); 267 void mipi_dsi_device_unregister(struct mipi_dsi_device *dsi); 268 struct mipi_dsi_device * 269 devm_mipi_dsi_device_register_full(struct device *dev, struct mipi_dsi_host *host, 270 const struct mipi_dsi_device_info *info); 271 struct mipi_dsi_device *of_find_mipi_dsi_device_by_node(struct device_node *np); 272 int mipi_dsi_attach(struct mipi_dsi_device *dsi); 273 int mipi_dsi_detach(struct mipi_dsi_device *dsi); 274 int devm_mipi_dsi_attach(struct device *dev, struct mipi_dsi_device *dsi); 275 int mipi_dsi_shutdown_peripheral(struct mipi_dsi_device *dsi); 276 int mipi_dsi_turn_on_peripheral(struct mipi_dsi_device *dsi); 277 int mipi_dsi_set_maximum_return_packet_size(struct mipi_dsi_device *dsi, 278 u16 value); 279 int mipi_dsi_compression_mode(struct mipi_dsi_device *dsi, bool enable); 280 int mipi_dsi_compression_mode_ext(struct mipi_dsi_device *dsi, bool enable, 281 enum mipi_dsi_compression_algo algo, 282 unsigned int pps_selector); 283 int mipi_dsi_picture_parameter_set(struct mipi_dsi_device *dsi, 284 const struct drm_dsc_picture_parameter_set *pps); 285 286 void mipi_dsi_compression_mode_ext_multi(struct mipi_dsi_multi_context *ctx, 287 bool enable, 288 enum mipi_dsi_compression_algo algo, 289 unsigned int pps_selector); 290 void mipi_dsi_compression_mode_multi(struct mipi_dsi_multi_context *ctx, 291 bool enable); 292 void mipi_dsi_picture_parameter_set_multi(struct mipi_dsi_multi_context *ctx, 293 const struct drm_dsc_picture_parameter_set *pps); 294 295 ssize_t mipi_dsi_generic_write(struct mipi_dsi_device *dsi, const void *payload, 296 size_t size); 297 void mipi_dsi_generic_write_multi(struct mipi_dsi_multi_context *ctx, 298 const void *payload, size_t size); 299 void mipi_dsi_dual_generic_write_multi(struct mipi_dsi_multi_context *ctx, 300 struct mipi_dsi_device *dsi1, 301 struct mipi_dsi_device *dsi2, 302 const void *payload, size_t size); 303 ssize_t mipi_dsi_generic_read(struct mipi_dsi_device *dsi, const void *params, 304 size_t num_params, void *data, size_t size); 305 u32 drm_mipi_dsi_get_input_bus_fmt(enum mipi_dsi_pixel_format dsi_format); 306 307 #define mipi_dsi_msleep(ctx, delay) \ 308 do { \ 309 if (!(ctx)->accum_err) \ 310 msleep(delay); \ 311 } while (0) 312 313 #define mipi_dsi_usleep_range(ctx, min, max) \ 314 do { \ 315 if (!(ctx)->accum_err) \ 316 usleep_range(min, max); \ 317 } while (0) 318 319 /** 320 * enum mipi_dsi_dcs_tear_mode - Tearing Effect Output Line mode 321 * @MIPI_DSI_DCS_TEAR_MODE_VBLANK: the TE output line consists of V-Blanking 322 * information only 323 * @MIPI_DSI_DCS_TEAR_MODE_VHBLANK : the TE output line consists of both 324 * V-Blanking and H-Blanking information 325 */ 326 enum mipi_dsi_dcs_tear_mode { 327 MIPI_DSI_DCS_TEAR_MODE_VBLANK, 328 MIPI_DSI_DCS_TEAR_MODE_VHBLANK, 329 }; 330 331 #define MIPI_DSI_DCS_POWER_MODE_DISPLAY (1 << 2) 332 #define MIPI_DSI_DCS_POWER_MODE_NORMAL (1 << 3) 333 #define MIPI_DSI_DCS_POWER_MODE_SLEEP (1 << 4) 334 #define MIPI_DSI_DCS_POWER_MODE_PARTIAL (1 << 5) 335 #define MIPI_DSI_DCS_POWER_MODE_IDLE (1 << 6) 336 337 ssize_t mipi_dsi_dcs_write_buffer(struct mipi_dsi_device *dsi, 338 const void *data, size_t len); 339 int mipi_dsi_dcs_write_buffer_chatty(struct mipi_dsi_device *dsi, 340 const void *data, size_t len); 341 void mipi_dsi_dcs_write_buffer_multi(struct mipi_dsi_multi_context *ctx, 342 const void *data, size_t len); 343 void mipi_dsi_dual_dcs_write_buffer_multi(struct mipi_dsi_multi_context *ctx, 344 struct mipi_dsi_device *dsi1, 345 struct mipi_dsi_device *dsi2, 346 const void *data, size_t len); 347 ssize_t mipi_dsi_dcs_write(struct mipi_dsi_device *dsi, u8 cmd, 348 const void *data, size_t len); 349 ssize_t mipi_dsi_dcs_read(struct mipi_dsi_device *dsi, u8 cmd, void *data, 350 size_t len); 351 void mipi_dsi_dcs_read_multi(struct mipi_dsi_multi_context *ctx, u8 cmd, 352 void *data, size_t len); 353 int mipi_dsi_dcs_nop(struct mipi_dsi_device *dsi); 354 int mipi_dsi_dcs_soft_reset(struct mipi_dsi_device *dsi); 355 int mipi_dsi_dcs_get_power_mode(struct mipi_dsi_device *dsi, u8 *mode); 356 int mipi_dsi_dcs_get_pixel_format(struct mipi_dsi_device *dsi, u8 *format); 357 int mipi_dsi_dcs_enter_sleep_mode(struct mipi_dsi_device *dsi); 358 int mipi_dsi_dcs_exit_sleep_mode(struct mipi_dsi_device *dsi); 359 int mipi_dsi_dcs_set_display_off(struct mipi_dsi_device *dsi); 360 int mipi_dsi_dcs_set_display_on(struct mipi_dsi_device *dsi); 361 int mipi_dsi_dcs_set_column_address(struct mipi_dsi_device *dsi, u16 start, 362 u16 end); 363 int mipi_dsi_dcs_set_page_address(struct mipi_dsi_device *dsi, u16 start, 364 u16 end); 365 int mipi_dsi_dcs_set_tear_on(struct mipi_dsi_device *dsi, 366 enum mipi_dsi_dcs_tear_mode mode); 367 int mipi_dsi_dcs_set_pixel_format(struct mipi_dsi_device *dsi, u8 format); 368 int mipi_dsi_dcs_set_tear_scanline(struct mipi_dsi_device *dsi, u16 scanline); 369 int mipi_dsi_dcs_set_display_brightness(struct mipi_dsi_device *dsi, 370 u16 brightness); 371 int mipi_dsi_dcs_get_display_brightness(struct mipi_dsi_device *dsi, 372 u16 *brightness); 373 int mipi_dsi_dcs_set_display_brightness_large(struct mipi_dsi_device *dsi, 374 u16 brightness); 375 int mipi_dsi_dcs_get_display_brightness_large(struct mipi_dsi_device *dsi, 376 u16 *brightness); 377 378 void mipi_dsi_dcs_nop_multi(struct mipi_dsi_multi_context *ctx); 379 void mipi_dsi_dcs_enter_sleep_mode_multi(struct mipi_dsi_multi_context *ctx); 380 void mipi_dsi_dcs_exit_sleep_mode_multi(struct mipi_dsi_multi_context *ctx); 381 void mipi_dsi_dcs_set_display_off_multi(struct mipi_dsi_multi_context *ctx); 382 void mipi_dsi_dcs_set_display_on_multi(struct mipi_dsi_multi_context *ctx); 383 void mipi_dsi_dcs_set_tear_on_multi(struct mipi_dsi_multi_context *ctx, 384 enum mipi_dsi_dcs_tear_mode mode); 385 void mipi_dsi_turn_on_peripheral_multi(struct mipi_dsi_multi_context *ctx); 386 void mipi_dsi_dcs_soft_reset_multi(struct mipi_dsi_multi_context *ctx); 387 void mipi_dsi_dcs_set_display_brightness_multi(struct mipi_dsi_multi_context *ctx, 388 u16 brightness); 389 void mipi_dsi_dcs_set_pixel_format_multi(struct mipi_dsi_multi_context *ctx, 390 u8 format); 391 void mipi_dsi_dcs_set_column_address_multi(struct mipi_dsi_multi_context *ctx, 392 u16 start, u16 end); 393 void mipi_dsi_dcs_set_page_address_multi(struct mipi_dsi_multi_context *ctx, 394 u16 start, u16 end); 395 void mipi_dsi_dcs_set_tear_scanline_multi(struct mipi_dsi_multi_context *ctx, 396 u16 scanline); 397 void mipi_dsi_dcs_set_tear_off_multi(struct mipi_dsi_multi_context *ctx); 398 void mipi_dsi_shutdown_peripheral_multi(struct mipi_dsi_multi_context *ctx); 399 400 /** 401 * mipi_dsi_generic_write_seq_multi - transmit data using a generic write packet 402 * 403 * This macro will print errors for you and error handling is optimized for 404 * callers that call this multiple times in a row. 405 * 406 * @ctx: Context for multiple DSI transactions 407 * @seq: buffer containing the payload 408 */ 409 #define mipi_dsi_generic_write_seq_multi(ctx, seq...) \ 410 do { \ 411 static const u8 d[] = { seq }; \ 412 mipi_dsi_generic_write_multi(ctx, d, ARRAY_SIZE(d)); \ 413 } while (0) 414 415 /** 416 * mipi_dsi_generic_write_var_seq_multi - transmit non-constant data using a 417 * generic write packet 418 * 419 * This macro will print errors for you and error handling is optimized for 420 * callers that call this multiple times in a row. 421 * 422 * @ctx: Context for multiple DSI transactions 423 * @seq: buffer containing the payload 424 */ 425 #define mipi_dsi_generic_write_var_seq_multi(ctx, seq...) \ 426 do { \ 427 const u8 d[] = { seq }; \ 428 mipi_dsi_generic_write_multi(ctx, d, ARRAY_SIZE(d)); \ 429 } while (0) 430 431 /** 432 * mipi_dsi_dcs_write_seq_multi - transmit a DCS command with payload 433 * 434 * This macro will print errors for you and error handling is optimized for 435 * callers that call this multiple times in a row. 436 * 437 * @ctx: Context for multiple DSI transactions 438 * @cmd: Command 439 * @seq: buffer containing data to be transmitted 440 */ 441 #define mipi_dsi_dcs_write_seq_multi(ctx, cmd, seq...) \ 442 do { \ 443 static const u8 d[] = { cmd, seq }; \ 444 mipi_dsi_dcs_write_buffer_multi(ctx, d, ARRAY_SIZE(d)); \ 445 } while (0) 446 447 /** 448 * mipi_dsi_dcs_write_var_seq_multi - transmit a DCS command with non-constant 449 * payload 450 * 451 * This macro will print errors for you and error handling is optimized for 452 * callers that call this multiple times in a row. 453 * 454 * @ctx: Context for multiple DSI transactions 455 * @cmd: Command 456 * @seq: buffer containing data to be transmitted 457 */ 458 #define mipi_dsi_dcs_write_var_seq_multi(ctx, cmd, seq...) \ 459 do { \ 460 const u8 d[] = { cmd, seq }; \ 461 mipi_dsi_dcs_write_buffer_multi(ctx, d, ARRAY_SIZE(d)); \ 462 } while (0) 463 464 /** 465 * mipi_dsi_dual - send the same MIPI DSI command to two interfaces 466 * 467 * This macro will send the specified MIPI DSI command twice, once per each of 468 * the two interfaces supplied. This is useful for reducing duplication of code 469 * in panel drivers which use two parallel serial interfaces. 470 * 471 * Note that the _func parameter cannot accept a macro such as 472 * mipi_dsi_generic_write_multi() or mipi_dsi_dcs_write_buffer_multi(). See 473 * mipi_dsi_dual_generic_write_multi() and 474 * mipi_dsi_dual_dcs_write_buffer_multi() instead. 475 * 476 * WARNING: This macro reuses the _func argument and the optional trailing 477 * arguments twice each, which may cause unintended side effects. For example, 478 * adding the postfix increment ++ operator to one of the arguments to be 479 * passed to _func will cause the variable to be incremented twice instead of 480 * once and the variable will be its original value + 1 when sent to _dsi2. 481 * 482 * @_func: MIPI DSI function to pass context and arguments into 483 * @_ctx: Context for multiple DSI transactions 484 * @_dsi1: First DSI interface to act as recipient of the MIPI DSI command 485 * @_dsi2: Second DSI interface to act as recipient of the MIPI DSI command 486 * @...: Arguments to pass to MIPI DSI function or macro 487 */ 488 489 #define mipi_dsi_dual(_func, _ctx, _dsi1, _dsi2, ...) \ 490 do { \ 491 struct mipi_dsi_multi_context *_ctxcpy = (_ctx); \ 492 _ctxcpy->dsi = (_dsi1); \ 493 (_func)(_ctxcpy, ##__VA_ARGS__); \ 494 _ctxcpy->dsi = (_dsi2); \ 495 (_func)(_ctxcpy, ##__VA_ARGS__); \ 496 } while (0) 497 498 /** 499 * mipi_dsi_dual_generic_write_seq_multi - transmit data using a generic write 500 * packet to two dsi interfaces, one after the other 501 * 502 * This macro will send the specified generic packet twice, once per each of 503 * the two interfaces supplied. This is useful for reducing duplication of code 504 * in panel drivers which use two parallel serial interfaces. 505 * 506 * Note that if an error occurs while transmitting the packet to the first DSI 507 * interface, the packet will not be sent to the second DSI interface. 508 * 509 * This macro will print errors for you and error handling is optimized for 510 * callers that call this multiple times in a row. 511 * 512 * @_ctx: Context for multiple DSI transactions 513 * @_dsi1: First DSI interface to act as recipient of packet 514 * @_dsi2: Second DSI interface to act as recipient of packet 515 * @_seq: buffer containing the payload 516 */ 517 #define mipi_dsi_dual_generic_write_seq_multi(_ctx, _dsi1, _dsi2, _seq...) \ 518 do { \ 519 static const u8 d[] = { _seq }; \ 520 mipi_dsi_dual_generic_write_multi(_ctx, _dsi1, _dsi2, d, \ 521 ARRAY_SIZE(d)); \ 522 } while (0) 523 524 /** 525 * mipi_dsi_dual_dcs_write_seq_multi - transmit a DCS command with payload to 526 * two dsi interfaces, one after the other 527 * 528 * This macro will send the specified DCS command with payload twice, once per 529 * each of the two interfaces supplied. This is useful for reducing duplication 530 * of code in panel drivers which use two parallel serial interfaces. 531 * 532 * Note that if an error occurs while transmitting the payload to the first DSI 533 * interface, the payload will not be sent to the second DSI interface. 534 * 535 * This macro will print errors for you and error handling is optimized for 536 * callers that call this multiple times in a row. 537 * 538 * @_ctx: Context for multiple DSI transactions 539 * @_dsi1: First DSI interface to act as recipient of packet 540 * @_dsi2: Second DSI interface to act as recipient of packet 541 * @_cmd: Command 542 * @_seq: buffer containing the payload 543 */ 544 #define mipi_dsi_dual_dcs_write_seq_multi(_ctx, _dsi1, _dsi2, _cmd, _seq...) \ 545 do { \ 546 static const u8 d[] = { _cmd, _seq }; \ 547 mipi_dsi_dual_dcs_write_buffer_multi(_ctx, _dsi1, _dsi2, d, \ 548 ARRAY_SIZE(d)); \ 549 } while (0) 550 551 /** 552 * struct mipi_dsi_driver - DSI driver 553 * @driver: device driver model driver 554 * @probe: callback for device binding 555 * @remove: callback for device unbinding 556 * @shutdown: called at shutdown time to quiesce the device 557 */ 558 struct mipi_dsi_driver { 559 struct device_driver driver; 560 int(*probe)(struct mipi_dsi_device *dsi); 561 void (*remove)(struct mipi_dsi_device *dsi); 562 void (*shutdown)(struct mipi_dsi_device *dsi); 563 }; 564 565 static inline struct mipi_dsi_driver * 566 to_mipi_dsi_driver(struct device_driver *driver) 567 { 568 return container_of(driver, struct mipi_dsi_driver, driver); 569 } 570 571 static inline void *mipi_dsi_get_drvdata(const struct mipi_dsi_device *dsi) 572 { 573 return dev_get_drvdata(&dsi->dev); 574 } 575 576 static inline void mipi_dsi_set_drvdata(struct mipi_dsi_device *dsi, void *data) 577 { 578 dev_set_drvdata(&dsi->dev, data); 579 } 580 581 int mipi_dsi_driver_register_full(struct mipi_dsi_driver *driver, 582 struct module *owner); 583 void mipi_dsi_driver_unregister(struct mipi_dsi_driver *driver); 584 585 #define mipi_dsi_driver_register(driver) \ 586 mipi_dsi_driver_register_full(driver, THIS_MODULE) 587 588 #define module_mipi_dsi_driver(__mipi_dsi_driver) \ 589 module_driver(__mipi_dsi_driver, mipi_dsi_driver_register, \ 590 mipi_dsi_driver_unregister) 591 592 #endif /* __DRM_MIPI_DSI__ */ 593