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) 141 142 enum mipi_dsi_pixel_format { 143 MIPI_DSI_FMT_RGB888, 144 MIPI_DSI_FMT_RGB666, 145 MIPI_DSI_FMT_RGB666_PACKED, 146 MIPI_DSI_FMT_RGB565, 147 MIPI_DSI_FMT_RGB101010, 148 }; 149 150 #define DSI_DEV_NAME_SIZE 20 151 152 /** 153 * struct mipi_dsi_device_info - template for creating a mipi_dsi_device 154 * @type: DSI peripheral chip type 155 * @channel: DSI virtual channel assigned to peripheral 156 * @node: pointer to OF device node or NULL 157 * 158 * This is populated and passed to mipi_dsi_device_new to create a new 159 * DSI device 160 */ 161 struct mipi_dsi_device_info { 162 char type[DSI_DEV_NAME_SIZE]; 163 u32 channel; 164 struct device_node *node; 165 }; 166 167 /** 168 * struct mipi_dsi_device - DSI peripheral device 169 * @host: DSI host for this peripheral 170 * @dev: driver model device node for this peripheral 171 * @attached: the DSI device has been successfully attached 172 * @name: DSI peripheral chip type 173 * @channel: virtual channel assigned to the peripheral 174 * @format: pixel format for video mode 175 * @lanes: number of active data lanes 176 * @mode_flags: DSI operation mode related flags 177 * @hs_rate: maximum lane frequency for high speed mode in hertz, this should 178 * be set to the real limits of the hardware, zero is only accepted for 179 * legacy drivers 180 * @lp_rate: maximum lane frequency for low power mode in hertz, this should 181 * be set to the real limits of the hardware, zero is only accepted for 182 * legacy drivers 183 * @dsc: panel/bridge DSC pps payload to be sent 184 */ 185 struct mipi_dsi_device { 186 struct mipi_dsi_host *host; 187 struct device dev; 188 bool attached; 189 190 char name[DSI_DEV_NAME_SIZE]; 191 unsigned int channel; 192 unsigned int lanes; 193 enum mipi_dsi_pixel_format format; 194 unsigned long mode_flags; 195 unsigned long hs_rate; 196 unsigned long lp_rate; 197 struct drm_dsc_config *dsc; 198 }; 199 200 /** 201 * struct mipi_dsi_multi_context - Context to call multiple MIPI DSI funcs in a row 202 */ 203 struct mipi_dsi_multi_context { 204 /** 205 * @dsi: Pointer to the MIPI DSI device 206 */ 207 struct mipi_dsi_device *dsi; 208 209 /** 210 * @accum_err: Storage for the accumulated error over the multiple calls 211 * 212 * Init to 0. If a function encounters an error then the error code 213 * will be stored here. If you call a function and this points to a 214 * non-zero value then the function will be a noop. This allows calling 215 * a function many times in a row and just checking the error at the 216 * end to see if any of them failed. 217 */ 218 int accum_err; 219 }; 220 221 #define MIPI_DSI_MODULE_PREFIX "mipi-dsi:" 222 223 #define to_mipi_dsi_device(__dev) container_of_const(__dev, struct mipi_dsi_device, dev) 224 225 extern const struct bus_type mipi_dsi_bus_type; 226 #define dev_is_mipi_dsi(dev) ((dev)->bus == &mipi_dsi_bus_type) 227 228 /** 229 * mipi_dsi_pixel_format_to_bpp - obtain the number of bits per pixel for any 230 * given pixel format defined by the MIPI DSI 231 * specification 232 * @fmt: MIPI DSI pixel format 233 * 234 * Returns: The number of bits per pixel of the given pixel format. 235 */ 236 static inline int mipi_dsi_pixel_format_to_bpp(enum mipi_dsi_pixel_format fmt) 237 { 238 switch (fmt) { 239 case MIPI_DSI_FMT_RGB101010: 240 return 30; 241 242 case MIPI_DSI_FMT_RGB888: 243 case MIPI_DSI_FMT_RGB666: 244 return 24; 245 246 case MIPI_DSI_FMT_RGB666_PACKED: 247 return 18; 248 249 case MIPI_DSI_FMT_RGB565: 250 return 16; 251 } 252 253 return -EINVAL; 254 } 255 256 enum mipi_dsi_compression_algo { 257 MIPI_DSI_COMPRESSION_DSC = 0, 258 MIPI_DSI_COMPRESSION_VENDOR = 3, 259 /* other two values are reserved, DSI 1.3 */ 260 }; 261 262 struct mipi_dsi_device * 263 mipi_dsi_device_register_full(struct mipi_dsi_host *host, 264 const struct mipi_dsi_device_info *info); 265 void mipi_dsi_device_unregister(struct mipi_dsi_device *dsi); 266 struct mipi_dsi_device * 267 devm_mipi_dsi_device_register_full(struct device *dev, struct mipi_dsi_host *host, 268 const struct mipi_dsi_device_info *info); 269 struct mipi_dsi_device *of_find_mipi_dsi_device_by_node(struct device_node *np); 270 int mipi_dsi_attach(struct mipi_dsi_device *dsi); 271 int mipi_dsi_detach(struct mipi_dsi_device *dsi); 272 int devm_mipi_dsi_attach(struct device *dev, struct mipi_dsi_device *dsi); 273 int mipi_dsi_shutdown_peripheral(struct mipi_dsi_device *dsi); 274 int mipi_dsi_turn_on_peripheral(struct mipi_dsi_device *dsi); 275 int mipi_dsi_set_maximum_return_packet_size(struct mipi_dsi_device *dsi, 276 u16 value); 277 int mipi_dsi_compression_mode(struct mipi_dsi_device *dsi, bool enable); 278 int mipi_dsi_compression_mode_ext(struct mipi_dsi_device *dsi, bool enable, 279 enum mipi_dsi_compression_algo algo, 280 unsigned int pps_selector); 281 int mipi_dsi_picture_parameter_set(struct mipi_dsi_device *dsi, 282 const struct drm_dsc_picture_parameter_set *pps); 283 284 void mipi_dsi_compression_mode_ext_multi(struct mipi_dsi_multi_context *ctx, 285 bool enable, 286 enum mipi_dsi_compression_algo algo, 287 unsigned int pps_selector); 288 void mipi_dsi_compression_mode_multi(struct mipi_dsi_multi_context *ctx, 289 bool enable); 290 void mipi_dsi_picture_parameter_set_multi(struct mipi_dsi_multi_context *ctx, 291 const struct drm_dsc_picture_parameter_set *pps); 292 293 ssize_t mipi_dsi_generic_write(struct mipi_dsi_device *dsi, const void *payload, 294 size_t size); 295 void mipi_dsi_generic_write_multi(struct mipi_dsi_multi_context *ctx, 296 const void *payload, size_t size); 297 void mipi_dsi_dual_generic_write_multi(struct mipi_dsi_multi_context *ctx, 298 struct mipi_dsi_device *dsi1, 299 struct mipi_dsi_device *dsi2, 300 const void *payload, size_t size); 301 ssize_t mipi_dsi_generic_read(struct mipi_dsi_device *dsi, const void *params, 302 size_t num_params, void *data, size_t size); 303 u32 drm_mipi_dsi_get_input_bus_fmt(enum mipi_dsi_pixel_format dsi_format); 304 305 #define mipi_dsi_msleep(ctx, delay) \ 306 do { \ 307 if (!(ctx)->accum_err) \ 308 msleep(delay); \ 309 } while (0) 310 311 #define mipi_dsi_usleep_range(ctx, min, max) \ 312 do { \ 313 if (!(ctx)->accum_err) \ 314 usleep_range(min, max); \ 315 } while (0) 316 317 /** 318 * enum mipi_dsi_dcs_tear_mode - Tearing Effect Output Line mode 319 * @MIPI_DSI_DCS_TEAR_MODE_VBLANK: the TE output line consists of V-Blanking 320 * information only 321 * @MIPI_DSI_DCS_TEAR_MODE_VHBLANK : the TE output line consists of both 322 * V-Blanking and H-Blanking information 323 */ 324 enum mipi_dsi_dcs_tear_mode { 325 MIPI_DSI_DCS_TEAR_MODE_VBLANK, 326 MIPI_DSI_DCS_TEAR_MODE_VHBLANK, 327 }; 328 329 #define MIPI_DSI_DCS_POWER_MODE_DISPLAY (1 << 2) 330 #define MIPI_DSI_DCS_POWER_MODE_NORMAL (1 << 3) 331 #define MIPI_DSI_DCS_POWER_MODE_SLEEP (1 << 4) 332 #define MIPI_DSI_DCS_POWER_MODE_PARTIAL (1 << 5) 333 #define MIPI_DSI_DCS_POWER_MODE_IDLE (1 << 6) 334 335 ssize_t mipi_dsi_dcs_write_buffer(struct mipi_dsi_device *dsi, 336 const void *data, size_t len); 337 int mipi_dsi_dcs_write_buffer_chatty(struct mipi_dsi_device *dsi, 338 const void *data, size_t len); 339 void mipi_dsi_dcs_write_buffer_multi(struct mipi_dsi_multi_context *ctx, 340 const void *data, size_t len); 341 void mipi_dsi_dual_dcs_write_buffer_multi(struct mipi_dsi_multi_context *ctx, 342 struct mipi_dsi_device *dsi1, 343 struct mipi_dsi_device *dsi2, 344 const void *data, size_t len); 345 ssize_t mipi_dsi_dcs_write(struct mipi_dsi_device *dsi, u8 cmd, 346 const void *data, size_t len); 347 ssize_t mipi_dsi_dcs_read(struct mipi_dsi_device *dsi, u8 cmd, void *data, 348 size_t len); 349 void mipi_dsi_dcs_read_multi(struct mipi_dsi_multi_context *ctx, u8 cmd, 350 void *data, size_t len); 351 int mipi_dsi_dcs_nop(struct mipi_dsi_device *dsi); 352 int mipi_dsi_dcs_soft_reset(struct mipi_dsi_device *dsi); 353 int mipi_dsi_dcs_get_power_mode(struct mipi_dsi_device *dsi, u8 *mode); 354 int mipi_dsi_dcs_get_pixel_format(struct mipi_dsi_device *dsi, u8 *format); 355 int mipi_dsi_dcs_enter_sleep_mode(struct mipi_dsi_device *dsi); 356 int mipi_dsi_dcs_exit_sleep_mode(struct mipi_dsi_device *dsi); 357 int mipi_dsi_dcs_set_display_off(struct mipi_dsi_device *dsi); 358 int mipi_dsi_dcs_set_display_on(struct mipi_dsi_device *dsi); 359 int mipi_dsi_dcs_set_column_address(struct mipi_dsi_device *dsi, u16 start, 360 u16 end); 361 int mipi_dsi_dcs_set_page_address(struct mipi_dsi_device *dsi, u16 start, 362 u16 end); 363 int mipi_dsi_dcs_set_tear_on(struct mipi_dsi_device *dsi, 364 enum mipi_dsi_dcs_tear_mode mode); 365 int mipi_dsi_dcs_set_pixel_format(struct mipi_dsi_device *dsi, u8 format); 366 int mipi_dsi_dcs_set_tear_scanline(struct mipi_dsi_device *dsi, u16 scanline); 367 int mipi_dsi_dcs_set_display_brightness(struct mipi_dsi_device *dsi, 368 u16 brightness); 369 int mipi_dsi_dcs_get_display_brightness(struct mipi_dsi_device *dsi, 370 u16 *brightness); 371 int mipi_dsi_dcs_set_display_brightness_large(struct mipi_dsi_device *dsi, 372 u16 brightness); 373 int mipi_dsi_dcs_get_display_brightness_large(struct mipi_dsi_device *dsi, 374 u16 *brightness); 375 376 void mipi_dsi_dcs_nop_multi(struct mipi_dsi_multi_context *ctx); 377 void mipi_dsi_dcs_enter_sleep_mode_multi(struct mipi_dsi_multi_context *ctx); 378 void mipi_dsi_dcs_exit_sleep_mode_multi(struct mipi_dsi_multi_context *ctx); 379 void mipi_dsi_dcs_set_display_off_multi(struct mipi_dsi_multi_context *ctx); 380 void mipi_dsi_dcs_set_display_on_multi(struct mipi_dsi_multi_context *ctx); 381 void mipi_dsi_dcs_set_tear_on_multi(struct mipi_dsi_multi_context *ctx, 382 enum mipi_dsi_dcs_tear_mode mode); 383 void mipi_dsi_turn_on_peripheral_multi(struct mipi_dsi_multi_context *ctx); 384 void mipi_dsi_dcs_soft_reset_multi(struct mipi_dsi_multi_context *ctx); 385 void mipi_dsi_dcs_set_display_brightness_multi(struct mipi_dsi_multi_context *ctx, 386 u16 brightness); 387 void mipi_dsi_dcs_set_pixel_format_multi(struct mipi_dsi_multi_context *ctx, 388 u8 format); 389 void mipi_dsi_dcs_set_column_address_multi(struct mipi_dsi_multi_context *ctx, 390 u16 start, u16 end); 391 void mipi_dsi_dcs_set_page_address_multi(struct mipi_dsi_multi_context *ctx, 392 u16 start, u16 end); 393 void mipi_dsi_dcs_set_tear_scanline_multi(struct mipi_dsi_multi_context *ctx, 394 u16 scanline); 395 void mipi_dsi_dcs_set_tear_off_multi(struct mipi_dsi_multi_context *ctx); 396 397 /** 398 * mipi_dsi_generic_write_seq_multi - transmit data using a generic write packet 399 * 400 * This macro will print errors for you and error handling is optimized for 401 * callers that call this multiple times in a row. 402 * 403 * @ctx: Context for multiple DSI transactions 404 * @seq: buffer containing the payload 405 */ 406 #define mipi_dsi_generic_write_seq_multi(ctx, seq...) \ 407 do { \ 408 static const u8 d[] = { seq }; \ 409 mipi_dsi_generic_write_multi(ctx, d, ARRAY_SIZE(d)); \ 410 } while (0) 411 412 /** 413 * mipi_dsi_generic_write_var_seq_multi - transmit non-constant data using a 414 * generic write packet 415 * 416 * This macro will print errors for you and error handling is optimized for 417 * callers that call this multiple times in a row. 418 * 419 * @ctx: Context for multiple DSI transactions 420 * @seq: buffer containing the payload 421 */ 422 #define mipi_dsi_generic_write_var_seq_multi(ctx, seq...) \ 423 do { \ 424 const u8 d[] = { seq }; \ 425 mipi_dsi_generic_write_multi(ctx, d, ARRAY_SIZE(d)); \ 426 } while (0) 427 428 /** 429 * mipi_dsi_dcs_write_seq_multi - transmit a DCS command with payload 430 * 431 * This macro will print errors for you and error handling is optimized for 432 * callers that call this multiple times in a row. 433 * 434 * @ctx: Context for multiple DSI transactions 435 * @cmd: Command 436 * @seq: buffer containing data to be transmitted 437 */ 438 #define mipi_dsi_dcs_write_seq_multi(ctx, cmd, seq...) \ 439 do { \ 440 static const u8 d[] = { cmd, seq }; \ 441 mipi_dsi_dcs_write_buffer_multi(ctx, d, ARRAY_SIZE(d)); \ 442 } while (0) 443 444 /** 445 * mipi_dsi_dcs_write_var_seq_multi - transmit a DCS command with non-constant 446 * payload 447 * 448 * This macro will print errors for you and error handling is optimized for 449 * callers that call this multiple times in a row. 450 * 451 * @ctx: Context for multiple DSI transactions 452 * @cmd: Command 453 * @seq: buffer containing data to be transmitted 454 */ 455 #define mipi_dsi_dcs_write_var_seq_multi(ctx, cmd, seq...) \ 456 do { \ 457 const u8 d[] = { cmd, seq }; \ 458 mipi_dsi_dcs_write_buffer_multi(ctx, d, ARRAY_SIZE(d)); \ 459 } while (0) 460 461 /** 462 * mipi_dsi_dual - send the same MIPI DSI command to two interfaces 463 * 464 * This macro will send the specified MIPI DSI command twice, once per each of 465 * the two interfaces supplied. This is useful for reducing duplication of code 466 * in panel drivers which use two parallel serial interfaces. 467 * 468 * Note that the _func parameter cannot accept a macro such as 469 * mipi_dsi_generic_write_multi() or mipi_dsi_dcs_write_buffer_multi(). See 470 * mipi_dsi_dual_generic_write_multi() and 471 * mipi_dsi_dual_dcs_write_buffer_multi() instead. 472 * 473 * WARNING: This macro reuses the _func argument and the optional trailing 474 * arguments twice each, which may cause unintended side effects. For example, 475 * adding the postfix increment ++ operator to one of the arguments to be 476 * passed to _func will cause the variable to be incremented twice instead of 477 * once and the variable will be its original value + 1 when sent to _dsi2. 478 * 479 * @_func: MIPI DSI function to pass context and arguments into 480 * @_ctx: Context for multiple DSI transactions 481 * @_dsi1: First DSI interface to act as recipient of the MIPI DSI command 482 * @_dsi2: Second DSI interface to act as recipient of the MIPI DSI command 483 * @...: Arguments to pass to MIPI DSI function or macro 484 */ 485 486 #define mipi_dsi_dual(_func, _ctx, _dsi1, _dsi2, ...) \ 487 do { \ 488 struct mipi_dsi_multi_context *_ctxcpy = (_ctx); \ 489 _ctxcpy->dsi = (_dsi1); \ 490 (_func)(_ctxcpy, ##__VA_ARGS__); \ 491 _ctxcpy->dsi = (_dsi2); \ 492 (_func)(_ctxcpy, ##__VA_ARGS__); \ 493 } while (0) 494 495 /** 496 * mipi_dsi_dual_generic_write_seq_multi - transmit data using a generic write 497 * packet to two dsi interfaces, one after the other 498 * 499 * This macro will send the specified generic packet twice, once per each of 500 * the two interfaces supplied. This is useful for reducing duplication of code 501 * in panel drivers which use two parallel serial interfaces. 502 * 503 * Note that if an error occurs while transmitting the packet to the first DSI 504 * interface, the packet will not be sent to the second DSI interface. 505 * 506 * This macro will print errors for you and error handling is optimized for 507 * callers that call this multiple times in a row. 508 * 509 * @_ctx: Context for multiple DSI transactions 510 * @_dsi1: First DSI interface to act as recipient of packet 511 * @_dsi2: Second DSI interface to act as recipient of packet 512 * @_seq: buffer containing the payload 513 */ 514 #define mipi_dsi_dual_generic_write_seq_multi(_ctx, _dsi1, _dsi2, _seq...) \ 515 do { \ 516 static const u8 d[] = { _seq }; \ 517 mipi_dsi_dual_generic_write_multi(_ctx, _dsi1, _dsi2, d, \ 518 ARRAY_SIZE(d)); \ 519 } while (0) 520 521 /** 522 * mipi_dsi_dual_dcs_write_seq_multi - transmit a DCS command with payload to 523 * two dsi interfaces, one after the other 524 * 525 * This macro will send the specified DCS command with payload twice, once per 526 * each of the two interfaces supplied. This is useful for reducing duplication 527 * of code in panel drivers which use two parallel serial interfaces. 528 * 529 * Note that if an error occurs while transmitting the payload to the first DSI 530 * interface, the payload will not be sent to the second DSI interface. 531 * 532 * This macro will print errors for you and error handling is optimized for 533 * callers that call this multiple times in a row. 534 * 535 * @_ctx: Context for multiple DSI transactions 536 * @_dsi1: First DSI interface to act as recipient of packet 537 * @_dsi2: Second DSI interface to act as recipient of packet 538 * @_cmd: Command 539 * @_seq: buffer containing the payload 540 */ 541 #define mipi_dsi_dual_dcs_write_seq_multi(_ctx, _dsi1, _dsi2, _cmd, _seq...) \ 542 do { \ 543 static const u8 d[] = { _cmd, _seq }; \ 544 mipi_dsi_dual_dcs_write_buffer_multi(_ctx, _dsi1, _dsi2, d, \ 545 ARRAY_SIZE(d)); \ 546 } while (0) 547 548 /** 549 * struct mipi_dsi_driver - DSI driver 550 * @driver: device driver model driver 551 * @probe: callback for device binding 552 * @remove: callback for device unbinding 553 * @shutdown: called at shutdown time to quiesce the device 554 */ 555 struct mipi_dsi_driver { 556 struct device_driver driver; 557 int(*probe)(struct mipi_dsi_device *dsi); 558 void (*remove)(struct mipi_dsi_device *dsi); 559 void (*shutdown)(struct mipi_dsi_device *dsi); 560 }; 561 562 static inline struct mipi_dsi_driver * 563 to_mipi_dsi_driver(struct device_driver *driver) 564 { 565 return container_of(driver, struct mipi_dsi_driver, driver); 566 } 567 568 static inline void *mipi_dsi_get_drvdata(const struct mipi_dsi_device *dsi) 569 { 570 return dev_get_drvdata(&dsi->dev); 571 } 572 573 static inline void mipi_dsi_set_drvdata(struct mipi_dsi_device *dsi, void *data) 574 { 575 dev_set_drvdata(&dsi->dev, data); 576 } 577 578 int mipi_dsi_driver_register_full(struct mipi_dsi_driver *driver, 579 struct module *owner); 580 void mipi_dsi_driver_unregister(struct mipi_dsi_driver *driver); 581 582 #define mipi_dsi_driver_register(driver) \ 583 mipi_dsi_driver_register_full(driver, THIS_MODULE) 584 585 #define module_mipi_dsi_driver(__mipi_dsi_driver) \ 586 module_driver(__mipi_dsi_driver, mipi_dsi_driver_register, \ 587 mipi_dsi_driver_unregister) 588 589 #endif /* __DRM_MIPI_DSI__ */ 590