1 /* 2 * (C) Copyright 2020 Rockchip Electronics Co., Ltd 3 * 4 * SPDX-License-Identifier: GPL-2.0+ 5 * Author: Wenping Zhang <wenping.zhang@rock-chips.com> 6 */ 7 #include <common.h> 8 #include <dm.h> 9 #include <stdio.h> 10 #include <errno.h> 11 #include <mapmem.h> 12 #include <stdlib.h> 13 #include <asm/arch/vendor.h> 14 #include <dm/of_access.h> 15 #include <dm/uclass.h> 16 #include <dm/uclass-id.h> 17 #include <boot_rkimg.h> 18 #include <rk_eink.h> 19 #include <backlight.h> 20 #include "rk_ebc.h" 21 #include "epdlut/epd_lut.h" 22 23 #define PART_WAVEFORM "waveform" 24 #define EINK_LOGO_PART_MAGIC "RKEL" 25 #define EINK_LOGO_IMAGE_MAGIC "GR04" 26 /* 27 * grayscale logo partition format: 28 * block0: 29 * struct logo_part_header part_header; 30 * struct grayscale_header logo1_header; 31 * struct grayscale_header logo2_header; 32 * struct grayscale_header logo3_header; 33 * struct grayscale_header logo4_header; 34 * .... 35 * 36 * block 1: 37 * logo1_image 38 * 39 * ..... 40 * block m: 41 * logo2_image 42 * 43 * ........ 44 * block n: 45 * logo3_image 46 * 47 * ........ 48 * block i: 49 * logoi_image 50 */ 51 52 //logo partition Header, 64byte 53 struct logo_part_header { 54 char magic[4]; /* must be "RKEL" */ 55 u32 totoal_size; 56 u32 screen_width; 57 u32 screen_height; 58 u32 logo_count; 59 u8 version[4]; 60 u32 rsv[10]; 61 } __packed; 62 63 // logo image header,32 byte 64 struct grayscale_header { 65 char magic[4]; /* must be "GR04" */ 66 u16 x; 67 u16 y; 68 u16 w; 69 u16 h; 70 u32 logo_type; 71 u32 data_offset; /* image offset in byte */ 72 u32 data_size; /* image size in byte */ 73 u32 rsv[2]; 74 } __packed; 75 76 /* 77 * The start address of logo image in logo.img must be aligned in 512 bytes, 78 * so the header size must be times of 512 bytes. Here we fix the size to 512 79 * bytes, so the count of logo image can only support up to 14. 80 */ 81 struct logo_info { 82 struct logo_part_header part_hdr; 83 struct grayscale_header img_hdr[14]; 84 } __packed; 85 86 struct rockchip_eink_display_priv { 87 struct udevice *dev; 88 struct udevice *ebc_tcon_dev; 89 struct udevice *ebc_pwr_dev; 90 int vcom; 91 struct udevice *backlight; 92 }; 93 94 enum { 95 EBC_PWR_DOWN = 0, 96 EBC_PWR_ON = 1, 97 }; 98 99 #define EINK_VCOM_ID 17 100 #define EINK_VCOM_MAX 64 101 #define VCOM_DEFAULT_VALUE 1650 102 103 static struct logo_info eink_logo_info; 104 static struct udevice *eink_dev; 105 static volatile int last_logo_type = -1; 106 static int read_vcom_from_vendor(void) 107 { 108 int ret = 0; 109 char vcom_str[EINK_VCOM_MAX] = {0}; 110 char vcom_args[EINK_VCOM_MAX] = {0}; 111 112 /* Read vcom value from vendor storage part */ 113 ret = vendor_storage_read(EINK_VCOM_ID, vcom_str, (EINK_VCOM_MAX - 1)); 114 if (ret > 0) { 115 snprintf(vcom_args, strlen(vcom_str) + 15, "ebc_pmic.vcom=%s", vcom_str); 116 printf("eink update bootargs: %s\n", vcom_args); 117 env_update("bootargs", vcom_args); 118 } else { 119 return ret; 120 } 121 122 return atoi(vcom_str); 123 } 124 125 static int read_waveform(struct udevice *dev) 126 { 127 int cnt, start, ret; 128 disk_partition_t part; 129 struct blk_desc *dev_desc; 130 struct ebc_panel *plat = dev_get_platdata(dev); 131 132 dev_desc = rockchip_get_bootdev(); 133 if (!dev_desc) { 134 printf("%s: Could not find device\n", __func__); 135 return -EIO; 136 } 137 if (part_get_info_by_name(dev_desc, PART_WAVEFORM, &part) < 0) { 138 printf("Get waveform partition failed\n"); 139 return -ENODEV; 140 } 141 cnt = plat->lut_pbuf_size / RK_BLK_SIZE; 142 start = part.start; 143 ret = blk_dread(dev_desc, start, cnt, (void *)plat->lut_pbuf); 144 if (ret != cnt) 145 printf("Try to read %d blocks failed, only read %d\n", 146 cnt, ret); 147 148 flush_dcache_range((ulong)plat->lut_pbuf, 149 ALIGN((ulong)plat->lut_pbuf + cnt, 150 CONFIG_SYS_CACHELINE_SIZE)); 151 ret = epd_lut_from_mem_init(plat->lut_pbuf, &plat->lut_ops); 152 if (ret < 0) { 153 printf("lut init failed\n"); 154 return -EINVAL; 155 } 156 157 return 0; 158 } 159 160 static u32 aligned_image_size_4k(struct udevice *dev) 161 { 162 struct ebc_panel *plat = dev_get_platdata(dev); 163 u32 w = plat->vir_width; 164 u32 h = plat->vir_height; 165 166 return ALIGN((w * h) >> 1, 4096); 167 } 168 169 /* 170 * This driver load the grayscale image from flash, 171 * and put it in the reserve memory which define in dts: 172 * display_reserved: framebuffer@10000000 { 173 * reg = <0x0 0x10000000 0x0 0x2000000>; 174 * no-map; 175 * }; 176 * Every image logo size must be aligned in 4K, make sure 177 * kernel can use it rightly, the buffer of LOGO image is 178 * put in order of below map: 179 * |---reset logo ---| 180 * |---uboot logo ---| 181 * |---kernel logo ---| 182 * |---charge_0 logo ---| 183 * |---charge_1 logo ---| 184 * |---charge_2 logo ---| 185 * |---charge_3 logo ---| 186 * |---charge_4 logo ---| 187 * |---charge_5 logo ---| 188 * |---battery low logo---| 189 * |---temp un-mirror buffer--| 190 */ 191 static int get_addr_by_type(struct udevice *dev, u32 logo_type) 192 { 193 u32 offset, indx, img_size; 194 struct ebc_panel *plat = dev_get_platdata(dev); 195 196 if (plat->disp_pbuf_size == 0 || !plat->disp_pbuf) { 197 printf("invalid display buffer, please check dts\n"); 198 return -EINVAL; 199 } 200 indx = ffs(logo_type); 201 img_size = aligned_image_size_4k(dev); 202 offset = img_size * indx; 203 if (offset + img_size > plat->disp_pbuf_size) { 204 printf("reserve display memory size is not enough\n"); 205 return -EINVAL; 206 } 207 208 switch (logo_type) { 209 case EINK_LOGO_RESET: 210 case EINK_LOGO_UBOOT: 211 case EINK_LOGO_KERNEL: 212 case EINK_LOGO_CHARGING_0: 213 case EINK_LOGO_CHARGING_1: 214 case EINK_LOGO_CHARGING_2: 215 case EINK_LOGO_CHARGING_3: 216 case EINK_LOGO_CHARGING_4: 217 case EINK_LOGO_CHARGING_5: 218 case EINK_LOGO_CHARGING_LOWPOWER: 219 /* 220 * The MIRROR_TEMP_BUF is used to save the 221 * non-mirror image data. 222 */ 223 case EINK_LOGO_UNMIRROR_TEMP_BUF: 224 return (plat->disp_pbuf + offset); 225 default: 226 printf("invalid logo type[%d]\n", logo_type); 227 } 228 229 return -EINVAL; 230 } 231 232 static int read_header(struct blk_desc *dev_desc, 233 disk_partition_t *part, 234 struct logo_info *header) 235 { 236 int i; 237 struct logo_part_header *part_hdr = &header->part_hdr; 238 239 if (blk_dread(dev_desc, part->start, 1, header) != 1) 240 return -EIO; 241 242 if (memcmp(part_hdr->magic, EINK_LOGO_PART_MAGIC, 4)) { 243 printf("partition header is invalid\n"); 244 return -EINVAL; 245 } 246 if (part_hdr->logo_count == 0) { 247 printf("the count of logo image is 0\n"); 248 return -EINVAL; 249 } 250 for (i = 0; i < part_hdr->logo_count; i++) { 251 struct grayscale_header *img_hdr = &header->img_hdr[i]; 252 253 if (memcmp(img_hdr->magic, EINK_LOGO_IMAGE_MAGIC, 4)) { 254 printf("image[%d] header '%s' is invalid\n", i, 255 img_hdr->magic); 256 return -EINVAL; 257 } 258 } 259 260 return 0; 261 } 262 263 static int read_grayscale(struct blk_desc *dev_desc, 264 disk_partition_t *part, u32 offset, 265 u32 size, void *buf) 266 { 267 u32 blk_start, blk_offset, blk_count; 268 269 blk_offset = DIV_ROUND_UP(offset, dev_desc->blksz); 270 blk_start = part->start + blk_offset; 271 blk_count = DIV_ROUND_UP(size, dev_desc->blksz); 272 273 debug("blk_offset=%d, blk_start=%d,blk_count=%d,out buf=%p\n", 274 blk_offset, blk_start, blk_count, buf); 275 if (blk_dread(dev_desc, blk_start, blk_count, buf) != blk_count) { 276 printf("read grayscale data failed\n"); 277 return -EIO; 278 } 279 280 return 0; 281 } 282 283 static int image_mirror(u8 *in_buf, u8 *out_buf, u16 w, u16 h) 284 { 285 int i; 286 287 if (!in_buf || !out_buf) { 288 printf("mirror in buffer or out buffer is NULL\n"); 289 return -EINVAL; 290 } 291 292 for (i = 0; i < h; i++) { 293 u16 column_len = w / 2; 294 u8 *column_in = in_buf + i * column_len; 295 u8 *column_out = out_buf + (h - i - 1) * column_len; 296 297 memcpy(column_out, column_in, column_len); 298 } 299 300 return 0; 301 } 302 303 /* 304 * The eink kernel driver need last frame to do part refresh, 305 * so we need to transfer two images to kernel, which is kernel 306 * logo and the logo displayed in uboot. 307 * 308 * this function use logo type bitmap to indicate several logo. 309 * u32 needed_logo: we only load needed logo image into ram, such as 310 * uboot logo + kernel logo or charger logo + kernel 311 * logo 312 * u32 *loaded_logo: because the needed logo may not exist in logo.img, 313 * store the really loaded logo in para loaded_logo. 314 */ 315 static int read_needed_logo_from_partition(struct udevice *dev, 316 u32 needed_logo, 317 u32 *loaded_logo) 318 { 319 int ret, i; 320 disk_partition_t part; 321 struct blk_desc *dev_desc; 322 struct logo_info *hdr = &eink_logo_info; 323 struct logo_part_header *part_hdr = &hdr->part_hdr; 324 struct ebc_panel *panel = dev_get_platdata(dev); 325 326 if (*loaded_logo & needed_logo) { 327 printf("logo[0x%x] is already loaded, just return!\n", 328 needed_logo); 329 return 0; 330 } 331 dev_desc = rockchip_get_bootdev(); 332 if (!dev_desc) { 333 printf("%s: Could not find device\n", __func__); 334 return -EIO; 335 } 336 337 if (part_get_info_by_name(dev_desc, PART_LOGO, &part) < 0) 338 return -ENODEV; 339 340 ret = read_header(dev_desc, &part, hdr); 341 if (ret < 0) { 342 printf("eink logo read header failed,ret = %d\n", ret); 343 return -EINVAL; 344 } 345 if (part_hdr->screen_width != panel->vir_width || 346 part_hdr->screen_height != panel->vir_height){ 347 printf("logo size(%dx%d) is not same as screen size(%dx%d)\n", 348 part_hdr->screen_width, part_hdr->screen_height, 349 panel->vir_width, panel->vir_height); 350 return -EINVAL; 351 } 352 353 for (i = 0; i < part_hdr->logo_count; i++) { 354 struct grayscale_header *img_hdr = &hdr->img_hdr[i]; 355 int pic_buf; 356 u32 offset = img_hdr->data_offset; 357 u32 size = img_hdr->data_size; 358 u32 logo_type = img_hdr->logo_type; 359 360 debug("offset=0x%x, size=%d,logo_type=%d,w=%d,h=%d\n", 361 offset, size, logo_type, img_hdr->w, img_hdr->h); 362 363 if (needed_logo & logo_type) { 364 pic_buf = get_addr_by_type(dev, logo_type); 365 366 if (pic_buf <= 0) { 367 printf("Get buffer failed for image %d\n", 368 img_hdr->logo_type); 369 return -EIO; 370 } 371 if (!IS_ALIGNED((ulong)pic_buf, 372 ARCH_DMA_MINALIGN)) { 373 printf("disp buffer is not dma aligned\n"); 374 return -EINVAL; 375 } 376 /* 377 * kernel logo is transmitted to kernel to display, and 378 * kernel will do the mirror operation, so skip kernel 379 * logo here. 380 */ 381 if (panel->mirror && needed_logo != EINK_LOGO_KERNEL) { 382 u32 w = panel->vir_width; 383 u32 h = panel->vir_height; 384 u32 mirror_buf = 0; 385 386 mirror_buf = get_addr_by_type(dev, 387 EINK_LOGO_UNMIRROR_TEMP_BUF); 388 if (mirror_buf <= 0) { 389 printf("get mirror buffer failed\n"); 390 return -EIO; 391 } 392 read_grayscale(dev_desc, &part, offset, size, 393 (void *)((ulong)mirror_buf)); 394 image_mirror((u8 *)((ulong)mirror_buf), 395 (u8 *)((ulong)pic_buf), w, h); 396 } else { 397 read_grayscale(dev_desc, &part, offset, size, 398 (void *)((ulong)pic_buf)); 399 } 400 flush_dcache_range((ulong)pic_buf, 401 ALIGN((ulong)pic_buf + size, 402 CONFIG_SYS_CACHELINE_SIZE)); 403 *loaded_logo |= logo_type; 404 } 405 } 406 407 return 0; 408 } 409 410 static int ebc_power_set(struct udevice *dev, int is_on) 411 { 412 int ret; 413 struct rockchip_eink_display_priv *priv = dev_get_priv(dev); 414 struct ebc_panel *panel = dev_get_platdata(dev); 415 struct udevice *ebc_tcon_dev = priv->ebc_tcon_dev; 416 struct rk_ebc_tcon_ops *ebc_tcon_ops = ebc_tcon_get_ops(ebc_tcon_dev); 417 struct udevice *ebc_pwr_dev = priv->ebc_pwr_dev; 418 struct rk_ebc_pwr_ops *pwr_ops = ebc_pwr_get_ops(ebc_pwr_dev); 419 420 if (is_on) { 421 ret = ebc_tcon_ops->enable(ebc_tcon_dev, panel); 422 if (ret) { 423 printf("%s, ebc tcon enabled failed\n", __func__); 424 return -1; 425 } 426 ret = pwr_ops->power_on(ebc_pwr_dev); 427 if (ret) { 428 printf("%s, power on failed\n", __func__); 429 return -1; 430 } 431 } else { 432 ret = pwr_ops->power_down(ebc_pwr_dev); 433 if (ret) { 434 printf("%s, power_down failed\n", __func__); 435 return -1; 436 } 437 ret = ebc_tcon_ops->disable(ebc_tcon_dev); 438 if (ret) { 439 printf("%s, ebc tcon disable failed\n", __func__); 440 return -1; 441 } 442 } 443 return 0; 444 } 445 446 static int eink_display(struct udevice *dev, u32 pre_img_buf, 447 u32 cur_img_buf, u32 lut_type, int update_mode) 448 { 449 u32 temperature, frame_num; 450 struct rockchip_eink_display_priv *priv = dev_get_priv(dev); 451 struct ebc_panel *plat = dev_get_platdata(dev); 452 struct epd_lut_ops *lut_ops = &plat->lut_ops; 453 struct udevice *ebc_pwr_dev = priv->ebc_pwr_dev; 454 struct rk_ebc_pwr_ops *pwr_ops = ebc_pwr_get_ops(ebc_pwr_dev); 455 struct udevice *ebc_tcon_dev = priv->ebc_tcon_dev; 456 struct rk_ebc_tcon_ops *ebc_tcon_ops = ebc_tcon_get_ops(ebc_tcon_dev); 457 458 pwr_ops->temp_get(ebc_pwr_dev, &temperature); 459 if (temperature <= 0 || temperature > 50) { 460 printf("temperature = %d, out of range0~50 ,use 25\n", 461 temperature); 462 temperature = 25; 463 } 464 465 if (!lut_ops->lut_get) { 466 printf("get lut ops failed\n"); 467 return -EIO; 468 } 469 lut_ops->lut_get(&plat->lut_data, lut_type, temperature); 470 frame_num = plat->lut_data.frame_num; 471 debug("lut_type=%d, frame num=%d, temp=%d\n", lut_type, 472 frame_num, temperature); 473 474 ebc_tcon_ops->lut_data_set(ebc_tcon_dev, plat->lut_data.data, 475 frame_num, 0); 476 ebc_tcon_ops->dsp_mode_set(ebc_tcon_dev, update_mode, 477 LUT_MODE, !THREE_WIN_MODE, !EINK_MODE); 478 ebc_tcon_ops->image_addr_set(ebc_tcon_dev, pre_img_buf, cur_img_buf); 479 ebc_tcon_ops->frame_start(ebc_tcon_dev, frame_num); 480 ebc_tcon_ops->wait_for_last_frame_complete(ebc_tcon_dev); 481 482 return 0; 483 } 484 485 static int rk_eink_display_init(void) 486 { 487 int ret; 488 struct uclass *uc; 489 struct udevice *dev; 490 491 if (eink_dev) { 492 printf("ebc-dev is already initialized!\n"); 493 return 0; 494 } 495 496 ret = uclass_get(UCLASS_EINK_DISPLAY, &uc); 497 if (ret) { 498 printf("can't find uclass eink\n"); 499 return -ENODEV; 500 } 501 for (uclass_first_device(UCLASS_EINK_DISPLAY, &dev); 502 dev; uclass_next_device(&dev)) 503 ; 504 505 if (eink_dev) { 506 printf("ebc-dev is probed success!\n"); 507 return 0; 508 } 509 printf("Can't find ebc-dev\n"); 510 return -ENODEV; 511 } 512 513 /* 514 * Eink display need current and previous image buffer, We assume 515 * every type of logo has only one image, so just tell this function 516 * last logo type and current logo type, it will find the right images. 517 * last_logo_type: -1 means it's first displaying. 518 */ 519 static int rockchip_eink_show_logo(int cur_logo_type, int update_mode) 520 { 521 int ret = 0; 522 u32 logo_addr; 523 u32 last_logo_addr; 524 struct ebc_panel *plat; 525 struct udevice *dev; 526 static u32 loaded_logo; 527 struct rockchip_eink_display_priv *priv; 528 529 if (!eink_dev) { 530 static bool first_init = true; 531 532 if (first_init) { 533 first_init = false; 534 ret = rk_eink_display_init(); 535 if (ret) { 536 printf("Get ebc dev failed, check dts\n"); 537 return -ENODEV; 538 } 539 } else { 540 return -ENODEV; 541 } 542 } 543 dev = eink_dev; 544 545 /*Don't need to update display*/ 546 if (last_logo_type == cur_logo_type) { 547 debug("Same as last picture, Don't need to display\n"); 548 return 0; 549 } 550 551 plat = dev_get_platdata(dev); 552 priv = dev_get_priv(dev); 553 554 ret = ebc_power_set(dev, EBC_PWR_ON); 555 if (ret) { 556 printf("Eink power on failed\n"); 557 return -1; 558 } 559 /* 560 * The last_logo_type is -1 means it's first displaying 561 */ 562 if (last_logo_type == -1) { 563 int size = (plat->vir_width * plat->vir_height) >> 1; 564 565 logo_addr = get_addr_by_type(dev, EINK_LOGO_RESET); 566 memset((u32 *)(u64)logo_addr, 0xff, size); 567 flush_dcache_range((ulong)logo_addr, 568 ALIGN((ulong)logo_addr + size, 569 CONFIG_SYS_CACHELINE_SIZE)); 570 eink_display(dev, logo_addr, logo_addr, 571 WF_TYPE_RESET, 0); 572 last_logo_type = 0; 573 last_logo_addr = logo_addr; 574 } else { 575 last_logo_addr = get_addr_by_type(dev, last_logo_type); 576 if (last_logo_addr < 0) { 577 printf("Invalid last logo addr, exit!\n"); 578 goto out; 579 } 580 if (cur_logo_type == EINK_LOGO_RESET) { 581 logo_addr = get_addr_by_type(dev, EINK_LOGO_RESET); 582 eink_display(dev, last_logo_addr, 583 logo_addr, 584 WF_TYPE_GC16, update_mode); 585 last_logo_type = -1; 586 goto out; 587 } 588 } 589 ret = read_needed_logo_from_partition(dev, cur_logo_type, 590 &loaded_logo); 591 if (ret || !(loaded_logo & cur_logo_type)) { 592 printf("read logo[0x%x] failed, loaded_logo=0x%x\n", 593 cur_logo_type, loaded_logo); 594 ret = -EIO; 595 goto out; 596 } 597 logo_addr = get_addr_by_type(dev, cur_logo_type); 598 debug("logo_addr=%x, logo_type=%d\n", logo_addr, cur_logo_type); 599 if (logo_addr <= 0) { 600 printf("get logo buffer failed\n"); 601 ret = -EIO; 602 goto out; 603 } 604 605 eink_display(dev, last_logo_addr, logo_addr, WF_TYPE_GC16, update_mode); 606 607 if (priv->backlight) 608 backlight_enable(priv->backlight); 609 610 last_logo_type = cur_logo_type; 611 /* 612 * System will boot up to kernel only when the 613 * logo is uboot logo 614 */ 615 if (cur_logo_type == EINK_LOGO_UBOOT) { 616 char logo_args[64] = {0}; 617 u32 uboot_logo_buf; 618 619 if (plat->mirror) 620 uboot_logo_buf = get_addr_by_type(dev, 621 EINK_LOGO_UNMIRROR_TEMP_BUF); 622 else 623 uboot_logo_buf = logo_addr; 624 printf("Transmit uboot logo addr(0x%x) to kernel\n", 625 uboot_logo_buf); 626 sprintf(logo_args, "ulogo_addr=0x%x", uboot_logo_buf); 627 env_update("bootargs", logo_args); 628 ret = read_needed_logo_from_partition(dev, EINK_LOGO_KERNEL, 629 &loaded_logo); 630 if (ret || !(loaded_logo & EINK_LOGO_KERNEL)) { 631 printf("No invalid kernel logo in logo.img\n"); 632 } else { 633 int klogo_addr = get_addr_by_type(dev, 634 EINK_LOGO_KERNEL); 635 636 if (klogo_addr <= 0) { 637 printf("get kernel logo buffer failed\n"); 638 ret = -EIO; 639 goto out; 640 } 641 printf("Transmit kernel logo addr(0x%x) to kernel\n", 642 klogo_addr); 643 sprintf(logo_args, "klogo_addr=0x%x", klogo_addr); 644 env_update("bootargs", logo_args); 645 } 646 } 647 648 out: 649 ret = ebc_power_set(dev, EBC_PWR_DOWN); 650 if (ret) 651 printf("Eink power down failed\n"); 652 return ret; 653 } 654 655 int rockchip_eink_show_uboot_logo(void) 656 { 657 return rockchip_eink_show_logo(EINK_LOGO_UBOOT, EINK_UPDATE_DIFF); 658 } 659 660 int rockchip_eink_show_charge_logo(int logo_type) 661 { 662 return rockchip_eink_show_logo(logo_type, EINK_UPDATE_DIFF); 663 } 664 665 static int rockchip_eink_display_probe(struct udevice *dev) 666 { 667 int ret, vcom; 668 struct rockchip_eink_display_priv *priv = dev_get_priv(dev); 669 670 /* Before relocation we don't need to do anything */ 671 if (!(gd->flags & GD_FLG_RELOC)) 672 return 0; 673 674 ret = uclass_get_device_by_phandle(UCLASS_EBC, dev, 675 "ebc_tcon", 676 &priv->ebc_tcon_dev); 677 if (ret) { 678 dev_err(dev, "Cannot get ebc_tcon: %d\n", ret); 679 return ret; 680 } 681 682 ret = uclass_get_device_by_phandle(UCLASS_I2C_GENERIC, dev, 683 "pmic", 684 &priv->ebc_pwr_dev); 685 if (ret) { 686 dev_err(dev, "Cannot get pmic: %d\n", ret); 687 return ret; 688 } 689 690 ret = uclass_get_device_by_phandle(UCLASS_PANEL_BACKLIGHT, dev, 691 "backlight", &priv->backlight); 692 if (ret && ret != -ENOENT) { 693 printf("%s: Cannot get backlight: %d\n", __func__, ret); 694 } 695 696 vcom = read_vcom_from_vendor(); 697 if (vcom <= 0) { 698 printf("read vcom from vendor failed, use default vcom\n"); 699 priv->vcom = VCOM_DEFAULT_VALUE; 700 } else { 701 priv->vcom = vcom; 702 } 703 704 if (priv->ebc_pwr_dev) { 705 struct rk_ebc_pwr_ops *pwr_ops; 706 707 pwr_ops = ebc_pwr_get_ops(priv->ebc_pwr_dev); 708 ret = pwr_ops->vcom_set(priv->ebc_pwr_dev, priv->vcom); 709 if (ret) { 710 printf("%s, vcom_set failed\n", __func__); 711 return -EIO; 712 } 713 } 714 715 // read lut to ram, and get lut ops 716 ret = read_waveform(dev); 717 if (ret < 0) { 718 printf("read wavform failed\n"); 719 return -EIO; 720 } 721 722 eink_dev = dev; 723 724 return 0; 725 } 726 727 static int rockchip_eink_display_ofdata_to_platdata(struct udevice *dev) 728 { 729 fdt_size_t size; 730 fdt_addr_t tmp_addr; 731 struct device_node *disp_mem; 732 struct device_node *waveform_mem; 733 struct ebc_panel *plat = dev_get_platdata(dev); 734 735 plat->width = dev_read_u32_default(dev, "panel,width", 0); 736 plat->height = dev_read_u32_default(dev, "panel,height", 0); 737 plat->vir_width = dev_read_u32_default(dev, "panel,vir_width", plat->width); 738 plat->vir_height = dev_read_u32_default(dev, "panel,vir_height", plat->height); 739 plat->sdck = dev_read_u32_default(dev, "panel,sdck", 0); 740 plat->lsl = dev_read_u32_default(dev, "panel,lsl", 0); 741 plat->lbl = dev_read_u32_default(dev, "panel,lbl", 0); 742 plat->ldl = dev_read_u32_default(dev, "panel,ldl", 0); 743 plat->lel = dev_read_u32_default(dev, "panel,lel", 0); 744 plat->gdck_sta = dev_read_u32_default(dev, "panel,gdck-sta", 0); 745 plat->lgonl = dev_read_u32_default(dev, "panel,lgonl", 0); 746 plat->fsl = dev_read_u32_default(dev, "panel,fsl", 0); 747 plat->fbl = dev_read_u32_default(dev, "panel,fbl", 0); 748 plat->fdl = dev_read_u32_default(dev, "panel,fdl", 0); 749 plat->fel = dev_read_u32_default(dev, "panel,fel", 0); 750 plat->panel_16bit = dev_read_u32_default(dev, "panel,panel_16bit", 0); 751 plat->panel_color = dev_read_u32_default(dev, "panel,panel_color", 0); 752 plat->mirror = dev_read_u32_default(dev, "panel,mirror", 0); 753 plat->width_mm = dev_read_u32_default(dev, "panel,width-mm", 0); 754 plat->height_mm = dev_read_u32_default(dev, "panel,height-mm", 0); 755 756 disp_mem = of_parse_phandle(ofnode_to_np(dev_ofnode(dev)), 757 "memory-region", 0); 758 if (!disp_mem) { 759 dev_err(dev, "Cannot get memory-region from dts\n"); 760 return -ENODEV; 761 } 762 tmp_addr = ofnode_get_addr_size(np_to_ofnode(disp_mem), "reg", &size); 763 if (tmp_addr == FDT_ADDR_T_NONE) { 764 printf("get display memory address failed\n"); 765 return -ENODEV; 766 } 767 768 plat->disp_pbuf = (u64)map_sysmem(tmp_addr, 0); 769 plat->disp_pbuf_size = size; 770 debug("display mem=0x%x, size=%x\n", plat->disp_pbuf, 771 plat->disp_pbuf_size); 772 waveform_mem = of_parse_phandle(ofnode_to_np(dev_ofnode(dev)), 773 "waveform-region", 0); 774 if (!waveform_mem) { 775 printf("Cannot get waveform-region from dts\n"); 776 return -ENODEV; 777 } 778 tmp_addr = ofnode_get_addr_size(np_to_ofnode(waveform_mem), 779 "reg", &size); 780 if (tmp_addr == FDT_ADDR_T_NONE) { 781 printf("get waveform memory address failed\n"); 782 return -ENODEV; 783 } 784 785 plat->lut_pbuf = map_sysmem(tmp_addr, 0); 786 plat->lut_pbuf_size = size; 787 debug("lut mem=0x%p, size=%x\n", plat->lut_pbuf, plat->lut_pbuf_size); 788 return 0; 789 } 790 791 static const struct udevice_id rockchip_eink_display_ids[] = { 792 { .compatible = "rockchip,ebc-dev", }, 793 {} 794 }; 795 796 U_BOOT_DRIVER(rk_eink_display) = { 797 .name = "rockchip_eink_display", 798 .id = UCLASS_EINK_DISPLAY, 799 .of_match = rockchip_eink_display_ids, 800 .ofdata_to_platdata = rockchip_eink_display_ofdata_to_platdata, 801 .probe = rockchip_eink_display_probe, 802 .priv_auto_alloc_size = sizeof(struct rockchip_eink_display_priv), 803 .platdata_auto_alloc_size = sizeof(struct ebc_panel), 804 }; 805 806 UCLASS_DRIVER(rk_eink) = { 807 .id = UCLASS_EINK_DISPLAY, 808 .name = "rk_eink", 809 }; 810 811