1// SPDX-License-Identifier: GPL-2.0-only 2/* 3 * Sony ACX565AKM LCD Panel driver 4 * 5 * Copyright (C) 2010 Nokia Corporation 6 * 7 * Original Driver Author: Imre Deak <imre.deak@nokia.com> 8 * Based on panel-generic.c by Tomi Valkeinen <tomi.valkeinen@nokia.com> 9 * Adapted to new DSS2 framework: Roger Quadros <roger.quadros@nokia.com> 10 */ 11 12#include <linux/kernel.h> 13#include <linux/module.h> 14#include <linux/platform_device.h> 15#include <linux/delay.h> 16#include <linux/spi/spi.h> 17#include <linux/jiffies.h> 18#include <linux/sched.h> 19#include <linux/backlight.h> 20#include <linux/fb.h> 21#include <linux/gpio/consumer.h> 22#include <linux/of.h> 23 24#include <video/omapfb_dss.h> 25 26#define MIPID_CMD_READ_DISP_ID 0x04 27#define MIPID_CMD_READ_RED 0x06 28#define MIPID_CMD_READ_GREEN 0x07 29#define MIPID_CMD_READ_BLUE 0x08 30#define MIPID_CMD_READ_DISP_STATUS 0x09 31#define MIPID_CMD_RDDSDR 0x0F 32#define MIPID_CMD_SLEEP_IN 0x10 33#define MIPID_CMD_SLEEP_OUT 0x11 34#define MIPID_CMD_DISP_OFF 0x28 35#define MIPID_CMD_DISP_ON 0x29 36#define MIPID_CMD_WRITE_DISP_BRIGHTNESS 0x51 37#define MIPID_CMD_READ_DISP_BRIGHTNESS 0x52 38#define MIPID_CMD_WRITE_CTRL_DISP 0x53 39 40#define CTRL_DISP_BRIGHTNESS_CTRL_ON (1 << 5) 41#define CTRL_DISP_AMBIENT_LIGHT_CTRL_ON (1 << 4) 42#define CTRL_DISP_BACKLIGHT_ON (1 << 2) 43#define CTRL_DISP_AUTO_BRIGHTNESS_ON (1 << 1) 44 45#define MIPID_CMD_READ_CTRL_DISP 0x54 46#define MIPID_CMD_WRITE_CABC 0x55 47#define MIPID_CMD_READ_CABC 0x56 48 49#define MIPID_VER_LPH8923 3 50#define MIPID_VER_LS041Y3 4 51#define MIPID_VER_L4F00311 8 52#define MIPID_VER_ACX565AKM 9 53 54struct panel_drv_data { 55 struct omap_dss_device dssdev; 56 struct omap_dss_device *in; 57 58 struct gpio_desc *reset_gpio; 59 60 int datapairs; 61 62 struct omap_video_timings videomode; 63 64 char *name; 65 int enabled; 66 int model; 67 int revision; 68 u8 display_id[3]; 69 unsigned has_bc:1; 70 unsigned has_cabc:1; 71 unsigned cabc_mode; 72 unsigned long hw_guard_end; /* next value of jiffies 73 when we can issue the 74 next sleep in/out command */ 75 unsigned long hw_guard_wait; /* max guard time in jiffies */ 76 77 struct spi_device *spi; 78 struct mutex mutex; 79 80 struct backlight_device *bl_dev; 81}; 82 83static const struct omap_video_timings acx565akm_panel_timings = { 84 .x_res = 800, 85 .y_res = 480, 86 .pixelclock = 24000000, 87 .hfp = 28, 88 .hsw = 4, 89 .hbp = 24, 90 .vfp = 3, 91 .vsw = 3, 92 .vbp = 4, 93 94 .vsync_level = OMAPDSS_SIG_ACTIVE_LOW, 95 .hsync_level = OMAPDSS_SIG_ACTIVE_LOW, 96 97 .data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE, 98 .de_level = OMAPDSS_SIG_ACTIVE_HIGH, 99 .sync_pclk_edge = OMAPDSS_DRIVE_SIG_FALLING_EDGE, 100}; 101 102#define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev) 103 104static void acx565akm_transfer(struct panel_drv_data *ddata, int cmd, 105 const u8 *wbuf, int wlen, u8 *rbuf, int rlen) 106{ 107 struct spi_message m; 108 struct spi_transfer *x, xfer[5]; 109 int r; 110 111 BUG_ON(ddata->spi == NULL); 112 113 spi_message_init(&m); 114 115 memset(xfer, 0, sizeof(xfer)); 116 x = &xfer[0]; 117 118 cmd &= 0xff; 119 x->tx_buf = &cmd; 120 x->bits_per_word = 9; 121 x->len = 2; 122 123 if (rlen > 1 && wlen == 0) { 124 /* 125 * Between the command and the response data there is a 126 * dummy clock cycle. Add an extra bit after the command 127 * word to account for this. 128 */ 129 x->bits_per_word = 10; 130 cmd <<= 1; 131 } 132 spi_message_add_tail(x, &m); 133 134 if (wlen) { 135 x++; 136 x->tx_buf = wbuf; 137 x->len = wlen; 138 x->bits_per_word = 9; 139 spi_message_add_tail(x, &m); 140 } 141 142 if (rlen) { 143 x++; 144 x->rx_buf = rbuf; 145 x->len = rlen; 146 spi_message_add_tail(x, &m); 147 } 148 149 r = spi_sync(ddata->spi, &m); 150 if (r < 0) 151 dev_dbg(&ddata->spi->dev, "spi_sync %d\n", r); 152} 153 154static inline void acx565akm_cmd(struct panel_drv_data *ddata, int cmd) 155{ 156 acx565akm_transfer(ddata, cmd, NULL, 0, NULL, 0); 157} 158 159static inline void acx565akm_write(struct panel_drv_data *ddata, 160 int reg, const u8 *buf, int len) 161{ 162 acx565akm_transfer(ddata, reg, buf, len, NULL, 0); 163} 164 165static inline void acx565akm_read(struct panel_drv_data *ddata, 166 int reg, u8 *buf, int len) 167{ 168 acx565akm_transfer(ddata, reg, NULL, 0, buf, len); 169} 170 171static void hw_guard_start(struct panel_drv_data *ddata, int guard_msec) 172{ 173 ddata->hw_guard_wait = msecs_to_jiffies(guard_msec); 174 ddata->hw_guard_end = jiffies + ddata->hw_guard_wait; 175} 176 177static void hw_guard_wait(struct panel_drv_data *ddata) 178{ 179 unsigned long wait = ddata->hw_guard_end - jiffies; 180 181 if ((long)wait > 0 && wait <= ddata->hw_guard_wait) { 182 set_current_state(TASK_UNINTERRUPTIBLE); 183 schedule_timeout(wait); 184 } 185} 186 187static void set_sleep_mode(struct panel_drv_data *ddata, int on) 188{ 189 int cmd; 190 191 if (on) 192 cmd = MIPID_CMD_SLEEP_IN; 193 else 194 cmd = MIPID_CMD_SLEEP_OUT; 195 /* 196 * We have to keep 120msec between sleep in/out commands. 197 * (8.2.15, 8.2.16). 198 */ 199 hw_guard_wait(ddata); 200 acx565akm_cmd(ddata, cmd); 201 hw_guard_start(ddata, 120); 202} 203 204static void set_display_state(struct panel_drv_data *ddata, int enabled) 205{ 206 int cmd = enabled ? MIPID_CMD_DISP_ON : MIPID_CMD_DISP_OFF; 207 208 acx565akm_cmd(ddata, cmd); 209} 210 211static int panel_enabled(struct panel_drv_data *ddata) 212{ 213 u32 disp_status; 214 int enabled; 215 216 acx565akm_read(ddata, MIPID_CMD_READ_DISP_STATUS, 217 (u8 *)&disp_status, 4); 218 disp_status = __be32_to_cpu(disp_status); 219 enabled = (disp_status & (1 << 17)) && (disp_status & (1 << 10)); 220 dev_dbg(&ddata->spi->dev, 221 "LCD panel %senabled by bootloader (status 0x%04x)\n", 222 enabled ? "" : "not ", disp_status); 223 return enabled; 224} 225 226static int panel_detect(struct panel_drv_data *ddata) 227{ 228 acx565akm_read(ddata, MIPID_CMD_READ_DISP_ID, ddata->display_id, 3); 229 dev_dbg(&ddata->spi->dev, "MIPI display ID: %02x%02x%02x\n", 230 ddata->display_id[0], 231 ddata->display_id[1], 232 ddata->display_id[2]); 233 234 switch (ddata->display_id[0]) { 235 case 0x10: 236 ddata->model = MIPID_VER_ACX565AKM; 237 ddata->name = "acx565akm"; 238 ddata->has_bc = 1; 239 ddata->has_cabc = 1; 240 break; 241 case 0x29: 242 ddata->model = MIPID_VER_L4F00311; 243 ddata->name = "l4f00311"; 244 break; 245 case 0x45: 246 ddata->model = MIPID_VER_LPH8923; 247 ddata->name = "lph8923"; 248 break; 249 case 0x83: 250 ddata->model = MIPID_VER_LS041Y3; 251 ddata->name = "ls041y3"; 252 break; 253 default: 254 ddata->name = "unknown"; 255 dev_err(&ddata->spi->dev, "invalid display ID\n"); 256 return -ENODEV; 257 } 258 259 ddata->revision = ddata->display_id[1]; 260 261 dev_info(&ddata->spi->dev, "omapfb: %s rev %02x LCD detected\n", 262 ddata->name, ddata->revision); 263 264 return 0; 265} 266 267/*----------------------Backlight Control-------------------------*/ 268 269static void enable_backlight_ctrl(struct panel_drv_data *ddata, int enable) 270{ 271 u16 ctrl; 272 273 acx565akm_read(ddata, MIPID_CMD_READ_CTRL_DISP, (u8 *)&ctrl, 1); 274 if (enable) { 275 ctrl |= CTRL_DISP_BRIGHTNESS_CTRL_ON | 276 CTRL_DISP_BACKLIGHT_ON; 277 } else { 278 ctrl &= ~(CTRL_DISP_BRIGHTNESS_CTRL_ON | 279 CTRL_DISP_BACKLIGHT_ON); 280 } 281 282 ctrl |= 1 << 8; 283 acx565akm_write(ddata, MIPID_CMD_WRITE_CTRL_DISP, (u8 *)&ctrl, 2); 284} 285 286static void set_cabc_mode(struct panel_drv_data *ddata, unsigned mode) 287{ 288 u16 cabc_ctrl; 289 290 ddata->cabc_mode = mode; 291 if (!ddata->enabled) 292 return; 293 cabc_ctrl = 0; 294 acx565akm_read(ddata, MIPID_CMD_READ_CABC, (u8 *)&cabc_ctrl, 1); 295 cabc_ctrl &= ~3; 296 cabc_ctrl |= (1 << 8) | (mode & 3); 297 acx565akm_write(ddata, MIPID_CMD_WRITE_CABC, (u8 *)&cabc_ctrl, 2); 298} 299 300static unsigned get_cabc_mode(struct panel_drv_data *ddata) 301{ 302 return ddata->cabc_mode; 303} 304 305static unsigned get_hw_cabc_mode(struct panel_drv_data *ddata) 306{ 307 u8 cabc_ctrl; 308 309 acx565akm_read(ddata, MIPID_CMD_READ_CABC, &cabc_ctrl, 1); 310 return cabc_ctrl & 3; 311} 312 313static void acx565akm_set_brightness(struct panel_drv_data *ddata, int level) 314{ 315 int bv; 316 317 bv = level | (1 << 8); 318 acx565akm_write(ddata, MIPID_CMD_WRITE_DISP_BRIGHTNESS, (u8 *)&bv, 2); 319 320 if (level) 321 enable_backlight_ctrl(ddata, 1); 322 else 323 enable_backlight_ctrl(ddata, 0); 324} 325 326static int acx565akm_get_actual_brightness(struct panel_drv_data *ddata) 327{ 328 u8 bv; 329 330 acx565akm_read(ddata, MIPID_CMD_READ_DISP_BRIGHTNESS, &bv, 1); 331 332 return bv; 333} 334 335 336static int acx565akm_bl_update_status(struct backlight_device *dev) 337{ 338 struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev); 339 int level; 340 341 dev_dbg(&ddata->spi->dev, "%s\n", __func__); 342 343 if (dev->props.fb_blank == FB_BLANK_UNBLANK && 344 dev->props.power == FB_BLANK_UNBLANK) 345 level = dev->props.brightness; 346 else 347 level = 0; 348 349 if (ddata->has_bc) 350 acx565akm_set_brightness(ddata, level); 351 else 352 return -ENODEV; 353 354 return 0; 355} 356 357static int acx565akm_bl_get_intensity(struct backlight_device *dev) 358{ 359 struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev); 360 361 dev_dbg(&dev->dev, "%s\n", __func__); 362 363 if (!ddata->has_bc) 364 return -ENODEV; 365 366 if (dev->props.fb_blank == FB_BLANK_UNBLANK && 367 dev->props.power == FB_BLANK_UNBLANK) { 368 if (ddata->has_bc) 369 return acx565akm_get_actual_brightness(ddata); 370 else 371 return dev->props.brightness; 372 } 373 374 return 0; 375} 376 377static int acx565akm_bl_update_status_locked(struct backlight_device *dev) 378{ 379 struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev); 380 int r; 381 382 mutex_lock(&ddata->mutex); 383 r = acx565akm_bl_update_status(dev); 384 mutex_unlock(&ddata->mutex); 385 386 return r; 387} 388 389static int acx565akm_bl_get_intensity_locked(struct backlight_device *dev) 390{ 391 struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev); 392 int r; 393 394 mutex_lock(&ddata->mutex); 395 r = acx565akm_bl_get_intensity(dev); 396 mutex_unlock(&ddata->mutex); 397 398 return r; 399} 400 401static const struct backlight_ops acx565akm_bl_ops = { 402 .get_brightness = acx565akm_bl_get_intensity_locked, 403 .update_status = acx565akm_bl_update_status_locked, 404}; 405 406/*--------------------Auto Brightness control via Sysfs---------------------*/ 407 408static const char * const cabc_modes[] = { 409 "off", /* always used when CABC is not supported */ 410 "ui", 411 "still-image", 412 "moving-image", 413}; 414 415static ssize_t show_cabc_mode(struct device *dev, 416 struct device_attribute *attr, 417 char *buf) 418{ 419 struct panel_drv_data *ddata = dev_get_drvdata(dev); 420 const char *mode_str; 421 int mode; 422 int len; 423 424 if (!ddata->has_cabc) 425 mode = 0; 426 else 427 mode = get_cabc_mode(ddata); 428 mode_str = "unknown"; 429 if (mode >= 0 && mode < ARRAY_SIZE(cabc_modes)) 430 mode_str = cabc_modes[mode]; 431 len = snprintf(buf, PAGE_SIZE, "%s\n", mode_str); 432 433 return len < PAGE_SIZE - 1 ? len : PAGE_SIZE - 1; 434} 435 436static ssize_t store_cabc_mode(struct device *dev, 437 struct device_attribute *attr, 438 const char *buf, size_t count) 439{ 440 struct panel_drv_data *ddata = dev_get_drvdata(dev); 441 int i; 442 443 for (i = 0; i < ARRAY_SIZE(cabc_modes); i++) { 444 const char *mode_str = cabc_modes[i]; 445 int cmp_len = strlen(mode_str); 446 447 if (count > 0 && buf[count - 1] == '\n') 448 count--; 449 if (count != cmp_len) 450 continue; 451 452 if (strncmp(buf, mode_str, cmp_len) == 0) 453 break; 454 } 455 456 if (i == ARRAY_SIZE(cabc_modes)) 457 return -EINVAL; 458 459 if (!ddata->has_cabc && i != 0) 460 return -EINVAL; 461 462 mutex_lock(&ddata->mutex); 463 set_cabc_mode(ddata, i); 464 mutex_unlock(&ddata->mutex); 465 466 return count; 467} 468 469static ssize_t show_cabc_available_modes(struct device *dev, 470 struct device_attribute *attr, 471 char *buf) 472{ 473 struct panel_drv_data *ddata = dev_get_drvdata(dev); 474 int len; 475 int i; 476 477 if (!ddata->has_cabc) 478 return sysfs_emit(buf, "%s\n", cabc_modes[0]); 479 480 for (i = 0, len = 0; 481 len < PAGE_SIZE && i < ARRAY_SIZE(cabc_modes); i++) 482 len += snprintf(&buf[len], PAGE_SIZE - len, "%s%s%s", 483 i ? " " : "", cabc_modes[i], 484 i == ARRAY_SIZE(cabc_modes) - 1 ? "\n" : ""); 485 486 return len < PAGE_SIZE ? len : PAGE_SIZE - 1; 487} 488 489static DEVICE_ATTR(cabc_mode, S_IRUGO | S_IWUSR, 490 show_cabc_mode, store_cabc_mode); 491static DEVICE_ATTR(cabc_available_modes, S_IRUGO, 492 show_cabc_available_modes, NULL); 493 494static struct attribute *bldev_attrs[] = { 495 &dev_attr_cabc_mode.attr, 496 &dev_attr_cabc_available_modes.attr, 497 NULL, 498}; 499 500static const struct attribute_group bldev_attr_group = { 501 .attrs = bldev_attrs, 502}; 503 504static int acx565akm_connect(struct omap_dss_device *dssdev) 505{ 506 struct panel_drv_data *ddata = to_panel_data(dssdev); 507 struct omap_dss_device *in = ddata->in; 508 509 if (omapdss_device_is_connected(dssdev)) 510 return 0; 511 512 return in->ops.sdi->connect(in, dssdev); 513} 514 515static void acx565akm_disconnect(struct omap_dss_device *dssdev) 516{ 517 struct panel_drv_data *ddata = to_panel_data(dssdev); 518 struct omap_dss_device *in = ddata->in; 519 520 if (!omapdss_device_is_connected(dssdev)) 521 return; 522 523 in->ops.sdi->disconnect(in, dssdev); 524} 525 526static int acx565akm_panel_power_on(struct omap_dss_device *dssdev) 527{ 528 struct panel_drv_data *ddata = to_panel_data(dssdev); 529 struct omap_dss_device *in = ddata->in; 530 int r; 531 532 dev_dbg(&ddata->spi->dev, "%s\n", __func__); 533 534 in->ops.sdi->set_timings(in, &ddata->videomode); 535 536 if (ddata->datapairs > 0) 537 in->ops.sdi->set_datapairs(in, ddata->datapairs); 538 539 r = in->ops.sdi->enable(in); 540 if (r) { 541 pr_err("%s sdi enable failed\n", __func__); 542 return r; 543 } 544 545 /*FIXME tweak me */ 546 msleep(50); 547 548 /* 549 * Note that we appear to activate the reset line here. However 550 * existing DTSes specified incorrect polarity for it (active high), 551 * so in fact this deasserts the reset line. 552 */ 553 if (ddata->reset_gpio) 554 gpiod_set_value_cansleep(ddata->reset_gpio, 1); 555 556 if (ddata->enabled) { 557 dev_dbg(&ddata->spi->dev, "panel already enabled\n"); 558 return 0; 559 } 560 561 /* 562 * We have to meet all the following delay requirements: 563 * 1. tRW: reset pulse width 10usec (7.12.1) 564 * 2. tRT: reset cancel time 5msec (7.12.1) 565 * 3. Providing PCLK,HS,VS signals for 2 frames = ~50msec worst 566 * case (7.6.2) 567 * 4. 120msec before the sleep out command (7.12.1) 568 */ 569 msleep(120); 570 571 set_sleep_mode(ddata, 0); 572 ddata->enabled = 1; 573 574 /* 5msec between sleep out and the next command. (8.2.16) */ 575 usleep_range(5000, 10000); 576 set_display_state(ddata, 1); 577 set_cabc_mode(ddata, ddata->cabc_mode); 578 579 return acx565akm_bl_update_status(ddata->bl_dev); 580} 581 582static void acx565akm_panel_power_off(struct omap_dss_device *dssdev) 583{ 584 struct panel_drv_data *ddata = to_panel_data(dssdev); 585 struct omap_dss_device *in = ddata->in; 586 587 dev_dbg(dssdev->dev, "%s\n", __func__); 588 589 if (!ddata->enabled) 590 return; 591 592 set_display_state(ddata, 0); 593 set_sleep_mode(ddata, 1); 594 ddata->enabled = 0; 595 /* 596 * We have to provide PCLK,HS,VS signals for 2 frames (worst case 597 * ~50msec) after sending the sleep in command and asserting the 598 * reset signal. We probably could assert the reset w/o the delay 599 * but we still delay to avoid possible artifacts. (7.6.1) 600 */ 601 msleep(50); 602 603 /* see comment in acx565akm_panel_power_on() */ 604 if (ddata->reset_gpio) 605 gpiod_set_value_cansleep(ddata->reset_gpio, 0); 606 607 /* FIXME need to tweak this delay */ 608 msleep(100); 609 610 in->ops.sdi->disable(in); 611} 612 613static int acx565akm_enable(struct omap_dss_device *dssdev) 614{ 615 struct panel_drv_data *ddata = to_panel_data(dssdev); 616 int r; 617 618 dev_dbg(dssdev->dev, "%s\n", __func__); 619 620 if (!omapdss_device_is_connected(dssdev)) 621 return -ENODEV; 622 623 if (omapdss_device_is_enabled(dssdev)) 624 return 0; 625 626 mutex_lock(&ddata->mutex); 627 r = acx565akm_panel_power_on(dssdev); 628 mutex_unlock(&ddata->mutex); 629 if (r) 630 return r; 631 632 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE; 633 634 return 0; 635} 636 637static void acx565akm_disable(struct omap_dss_device *dssdev) 638{ 639 struct panel_drv_data *ddata = to_panel_data(dssdev); 640 641 dev_dbg(dssdev->dev, "%s\n", __func__); 642 643 if (!omapdss_device_is_enabled(dssdev)) 644 return; 645 646 mutex_lock(&ddata->mutex); 647 acx565akm_panel_power_off(dssdev); 648 mutex_unlock(&ddata->mutex); 649 650 dssdev->state = OMAP_DSS_DISPLAY_DISABLED; 651} 652 653static void acx565akm_set_timings(struct omap_dss_device *dssdev, 654 struct omap_video_timings *timings) 655{ 656 struct panel_drv_data *ddata = to_panel_data(dssdev); 657 struct omap_dss_device *in = ddata->in; 658 659 ddata->videomode = *timings; 660 dssdev->panel.timings = *timings; 661 662 in->ops.sdi->set_timings(in, timings); 663} 664 665static void acx565akm_get_timings(struct omap_dss_device *dssdev, 666 struct omap_video_timings *timings) 667{ 668 struct panel_drv_data *ddata = to_panel_data(dssdev); 669 670 *timings = ddata->videomode; 671} 672 673static int acx565akm_check_timings(struct omap_dss_device *dssdev, 674 struct omap_video_timings *timings) 675{ 676 struct panel_drv_data *ddata = to_panel_data(dssdev); 677 struct omap_dss_device *in = ddata->in; 678 679 return in->ops.sdi->check_timings(in, timings); 680} 681 682static struct omap_dss_driver acx565akm_ops = { 683 .connect = acx565akm_connect, 684 .disconnect = acx565akm_disconnect, 685 686 .enable = acx565akm_enable, 687 .disable = acx565akm_disable, 688 689 .set_timings = acx565akm_set_timings, 690 .get_timings = acx565akm_get_timings, 691 .check_timings = acx565akm_check_timings, 692 693 .get_resolution = omapdss_default_get_resolution, 694}; 695 696static int acx565akm_probe(struct spi_device *spi) 697{ 698 struct panel_drv_data *ddata; 699 struct omap_dss_device *dssdev; 700 struct backlight_device *bldev; 701 int max_brightness, brightness; 702 struct backlight_properties props; 703 int r; 704 705 dev_dbg(&spi->dev, "%s\n", __func__); 706 707 if (!spi->dev.of_node) 708 return -ENODEV; 709 710 spi->mode = SPI_MODE_3; 711 712 ddata = devm_kzalloc(&spi->dev, sizeof(*ddata), GFP_KERNEL); 713 if (ddata == NULL) 714 return -ENOMEM; 715 716 dev_set_drvdata(&spi->dev, ddata); 717 718 ddata->spi = spi; 719 720 mutex_init(&ddata->mutex); 721 722 ddata->in = omapdss_of_find_source_for_first_ep(spi->dev.of_node); 723 r = PTR_ERR_OR_ZERO(ddata->in); 724 if (r) { 725 dev_err(&spi->dev, "failed to find video source\n"); 726 return r; 727 } 728 729 ddata->reset_gpio = devm_gpiod_get_optional(&spi->dev, "reset", 730 GPIOD_OUT_LOW); 731 r = PTR_ERR_OR_ZERO(ddata->reset_gpio); 732 if (r) 733 goto err_gpio; 734 735 if (ddata->reset_gpio) { 736 gpiod_set_consumer_name(ddata->reset_gpio, "lcd reset"); 737 738 /* release the reset line */ 739 gpiod_set_value_cansleep(ddata->reset_gpio, 1); 740 } 741 742 /* 743 * After reset we have to wait 5 msec before the first 744 * command can be sent. 745 */ 746 usleep_range(5000, 10000); 747 748 ddata->enabled = panel_enabled(ddata); 749 750 r = panel_detect(ddata); 751 752 if (!ddata->enabled && ddata->reset_gpio) 753 gpiod_set_value_cansleep(ddata->reset_gpio, 0); 754 755 if (r) { 756 dev_err(&spi->dev, "%s panel detect error\n", __func__); 757 goto err_detect; 758 } 759 760 memset(&props, 0, sizeof(props)); 761 props.fb_blank = FB_BLANK_UNBLANK; 762 props.power = FB_BLANK_UNBLANK; 763 props.type = BACKLIGHT_RAW; 764 765 bldev = backlight_device_register("acx565akm", &ddata->spi->dev, 766 ddata, &acx565akm_bl_ops, &props); 767 if (IS_ERR(bldev)) { 768 r = PTR_ERR(bldev); 769 goto err_reg_bl; 770 } 771 ddata->bl_dev = bldev; 772 if (ddata->has_cabc) { 773 r = sysfs_create_group(&bldev->dev.kobj, &bldev_attr_group); 774 if (r) { 775 dev_err(&bldev->dev, 776 "%s failed to create sysfs files\n", __func__); 777 goto err_sysfs; 778 } 779 ddata->cabc_mode = get_hw_cabc_mode(ddata); 780 } 781 782 max_brightness = 255; 783 784 if (ddata->has_bc) 785 brightness = acx565akm_get_actual_brightness(ddata); 786 else 787 brightness = 0; 788 789 bldev->props.max_brightness = max_brightness; 790 bldev->props.brightness = brightness; 791 792 acx565akm_bl_update_status(bldev); 793 794 795 ddata->videomode = acx565akm_panel_timings; 796 797 dssdev = &ddata->dssdev; 798 dssdev->dev = &spi->dev; 799 dssdev->driver = &acx565akm_ops; 800 dssdev->type = OMAP_DISPLAY_TYPE_SDI; 801 dssdev->owner = THIS_MODULE; 802 dssdev->panel.timings = ddata->videomode; 803 804 r = omapdss_register_display(dssdev); 805 if (r) { 806 dev_err(&spi->dev, "Failed to register panel\n"); 807 goto err_reg; 808 } 809 810 return 0; 811 812err_reg: 813 sysfs_remove_group(&bldev->dev.kobj, &bldev_attr_group); 814err_sysfs: 815 backlight_device_unregister(bldev); 816err_reg_bl: 817err_detect: 818err_gpio: 819 omap_dss_put_device(ddata->in); 820 return r; 821} 822 823static void acx565akm_remove(struct spi_device *spi) 824{ 825 struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev); 826 struct omap_dss_device *dssdev = &ddata->dssdev; 827 struct omap_dss_device *in = ddata->in; 828 829 dev_dbg(&ddata->spi->dev, "%s\n", __func__); 830 831 sysfs_remove_group(&ddata->bl_dev->dev.kobj, &bldev_attr_group); 832 backlight_device_unregister(ddata->bl_dev); 833 834 omapdss_unregister_display(dssdev); 835 836 acx565akm_disable(dssdev); 837 acx565akm_disconnect(dssdev); 838 839 omap_dss_put_device(in); 840} 841 842static const struct of_device_id acx565akm_of_match[] = { 843 { .compatible = "omapdss,sony,acx565akm", }, 844 {}, 845}; 846MODULE_DEVICE_TABLE(of, acx565akm_of_match); 847 848static struct spi_driver acx565akm_driver = { 849 .driver = { 850 .name = "acx565akm", 851 .of_match_table = acx565akm_of_match, 852 .suppress_bind_attrs = true, 853 }, 854 .probe = acx565akm_probe, 855 .remove = acx565akm_remove, 856}; 857 858module_spi_driver(acx565akm_driver); 859 860MODULE_AUTHOR("Nokia Corporation"); 861MODULE_DESCRIPTION("acx565akm LCD Driver"); 862MODULE_LICENSE("GPL"); 863