| 1 | /* |
| 2 | * Sony ACX565AKM LCD Panel driver |
| 3 | * |
| 4 | * Copyright (C) 2010 Nokia Corporation |
| 5 | * |
| 6 | * Original Driver Author: Imre Deak <imre.deak@nokia.com> |
| 7 | * Based on panel-generic.c by Tomi Valkeinen <tomi.valkeinen@nokia.com> |
| 8 | * Adapted to new DSS2 framework: Roger Quadros <roger.quadros@nokia.com> |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify it |
| 11 | * under the terms of the GNU General Public License version 2 as published by |
| 12 | * the Free Software Foundation. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, but WITHOUT |
| 15 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 16 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 17 | * more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License along with |
| 20 | * this program. If not, see <http://www.gnu.org/licenses/>. |
| 21 | */ |
| 22 | |
| 23 | #include <linux/kernel.h> |
| 24 | #include <linux/module.h> |
| 25 | #include <linux/platform_device.h> |
| 26 | #include <linux/delay.h> |
| 27 | #include <linux/spi/spi.h> |
| 28 | #include <linux/jiffies.h> |
| 29 | #include <linux/sched.h> |
| 30 | #include <linux/backlight.h> |
| 31 | #include <linux/gpio/consumer.h> |
| 32 | #include <linux/of.h> |
| 33 | #include <linux/of_gpio.h> |
| 34 | |
| 35 | #include <video/omap-panel-data.h> |
| 36 | |
| 37 | #include "../dss/omapdss.h" |
| 38 | |
| 39 | #define MIPID_CMD_READ_DISP_ID 0x04 |
| 40 | #define MIPID_CMD_READ_RED 0x06 |
| 41 | #define MIPID_CMD_READ_GREEN 0x07 |
| 42 | #define MIPID_CMD_READ_BLUE 0x08 |
| 43 | #define MIPID_CMD_READ_DISP_STATUS 0x09 |
| 44 | #define MIPID_CMD_RDDSDR 0x0F |
| 45 | #define MIPID_CMD_SLEEP_IN 0x10 |
| 46 | #define MIPID_CMD_SLEEP_OUT 0x11 |
| 47 | #define MIPID_CMD_DISP_OFF 0x28 |
| 48 | #define MIPID_CMD_DISP_ON 0x29 |
| 49 | #define MIPID_CMD_WRITE_DISP_BRIGHTNESS 0x51 |
| 50 | #define MIPID_CMD_READ_DISP_BRIGHTNESS 0x52 |
| 51 | #define MIPID_CMD_WRITE_CTRL_DISP 0x53 |
| 52 | |
| 53 | #define CTRL_DISP_BRIGHTNESS_CTRL_ON (1 << 5) |
| 54 | #define CTRL_DISP_AMBIENT_LIGHT_CTRL_ON (1 << 4) |
| 55 | #define CTRL_DISP_BACKLIGHT_ON (1 << 2) |
| 56 | #define CTRL_DISP_AUTO_BRIGHTNESS_ON (1 << 1) |
| 57 | |
| 58 | #define MIPID_CMD_READ_CTRL_DISP 0x54 |
| 59 | #define MIPID_CMD_WRITE_CABC 0x55 |
| 60 | #define MIPID_CMD_READ_CABC 0x56 |
| 61 | |
| 62 | #define MIPID_VER_LPH8923 3 |
| 63 | #define MIPID_VER_LS041Y3 4 |
| 64 | #define MIPID_VER_L4F00311 8 |
| 65 | #define MIPID_VER_ACX565AKM 9 |
| 66 | |
| 67 | struct panel_drv_data { |
| 68 | struct omap_dss_device dssdev; |
| 69 | struct omap_dss_device *in; |
| 70 | |
| 71 | int reset_gpio; |
| 72 | int datapairs; |
| 73 | |
| 74 | struct omap_video_timings videomode; |
| 75 | |
| 76 | char *name; |
| 77 | int enabled; |
| 78 | int model; |
| 79 | int revision; |
| 80 | u8 display_id[3]; |
| 81 | unsigned has_bc:1; |
| 82 | unsigned has_cabc:1; |
| 83 | unsigned cabc_mode; |
| 84 | unsigned long hw_guard_end; /* next value of jiffies |
| 85 | when we can issue the |
| 86 | next sleep in/out command */ |
| 87 | unsigned long hw_guard_wait; /* max guard time in jiffies */ |
| 88 | |
| 89 | struct spi_device *spi; |
| 90 | struct mutex mutex; |
| 91 | |
| 92 | struct backlight_device *bl_dev; |
| 93 | }; |
| 94 | |
| 95 | static const struct omap_video_timings acx565akm_panel_timings = { |
| 96 | .x_res = 800, |
| 97 | .y_res = 480, |
| 98 | .pixelclock = 24000000, |
| 99 | .hfp = 28, |
| 100 | .hsw = 4, |
| 101 | .hbp = 24, |
| 102 | .vfp = 3, |
| 103 | .vsw = 3, |
| 104 | .vbp = 4, |
| 105 | |
| 106 | .vsync_level = OMAPDSS_SIG_ACTIVE_LOW, |
| 107 | .hsync_level = OMAPDSS_SIG_ACTIVE_LOW, |
| 108 | |
| 109 | .data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE, |
| 110 | .de_level = OMAPDSS_SIG_ACTIVE_HIGH, |
| 111 | .sync_pclk_edge = OMAPDSS_DRIVE_SIG_FALLING_EDGE, |
| 112 | }; |
| 113 | |
| 114 | #define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev) |
| 115 | |
| 116 | static void acx565akm_transfer(struct panel_drv_data *ddata, int cmd, |
| 117 | const u8 *wbuf, int wlen, u8 *rbuf, int rlen) |
| 118 | { |
| 119 | struct spi_message m; |
| 120 | struct spi_transfer *x, xfer[5]; |
| 121 | int r; |
| 122 | |
| 123 | BUG_ON(ddata->spi == NULL); |
| 124 | |
| 125 | spi_message_init(&m); |
| 126 | |
| 127 | memset(xfer, 0, sizeof(xfer)); |
| 128 | x = &xfer[0]; |
| 129 | |
| 130 | cmd &= 0xff; |
| 131 | x->tx_buf = &cmd; |
| 132 | x->bits_per_word = 9; |
| 133 | x->len = 2; |
| 134 | |
| 135 | if (rlen > 1 && wlen == 0) { |
| 136 | /* |
| 137 | * Between the command and the response data there is a |
| 138 | * dummy clock cycle. Add an extra bit after the command |
| 139 | * word to account for this. |
| 140 | */ |
| 141 | x->bits_per_word = 10; |
| 142 | cmd <<= 1; |
| 143 | } |
| 144 | spi_message_add_tail(x, &m); |
| 145 | |
| 146 | if (wlen) { |
| 147 | x++; |
| 148 | x->tx_buf = wbuf; |
| 149 | x->len = wlen; |
| 150 | x->bits_per_word = 9; |
| 151 | spi_message_add_tail(x, &m); |
| 152 | } |
| 153 | |
| 154 | if (rlen) { |
| 155 | x++; |
| 156 | x->rx_buf = rbuf; |
| 157 | x->len = rlen; |
| 158 | spi_message_add_tail(x, &m); |
| 159 | } |
| 160 | |
| 161 | r = spi_sync(ddata->spi, &m); |
| 162 | if (r < 0) |
| 163 | dev_dbg(&ddata->spi->dev, "spi_sync %d\n", r); |
| 164 | } |
| 165 | |
| 166 | static inline void acx565akm_cmd(struct panel_drv_data *ddata, int cmd) |
| 167 | { |
| 168 | acx565akm_transfer(ddata, cmd, NULL, 0, NULL, 0); |
| 169 | } |
| 170 | |
| 171 | static inline void acx565akm_write(struct panel_drv_data *ddata, |
| 172 | int reg, const u8 *buf, int len) |
| 173 | { |
| 174 | acx565akm_transfer(ddata, reg, buf, len, NULL, 0); |
| 175 | } |
| 176 | |
| 177 | static inline void acx565akm_read(struct panel_drv_data *ddata, |
| 178 | int reg, u8 *buf, int len) |
| 179 | { |
| 180 | acx565akm_transfer(ddata, reg, NULL, 0, buf, len); |
| 181 | } |
| 182 | |
| 183 | static void hw_guard_start(struct panel_drv_data *ddata, int guard_msec) |
| 184 | { |
| 185 | ddata->hw_guard_wait = msecs_to_jiffies(guard_msec); |
| 186 | ddata->hw_guard_end = jiffies + ddata->hw_guard_wait; |
| 187 | } |
| 188 | |
| 189 | static void hw_guard_wait(struct panel_drv_data *ddata) |
| 190 | { |
| 191 | unsigned long wait = ddata->hw_guard_end - jiffies; |
| 192 | |
| 193 | if ((long)wait > 0 && wait <= ddata->hw_guard_wait) { |
| 194 | set_current_state(TASK_UNINTERRUPTIBLE); |
| 195 | schedule_timeout(wait); |
| 196 | } |
| 197 | } |
| 198 | |
| 199 | static void set_sleep_mode(struct panel_drv_data *ddata, int on) |
| 200 | { |
| 201 | int cmd; |
| 202 | |
| 203 | if (on) |
| 204 | cmd = MIPID_CMD_SLEEP_IN; |
| 205 | else |
| 206 | cmd = MIPID_CMD_SLEEP_OUT; |
| 207 | /* |
| 208 | * We have to keep 120msec between sleep in/out commands. |
| 209 | * (8.2.15, 8.2.16). |
| 210 | */ |
| 211 | hw_guard_wait(ddata); |
| 212 | acx565akm_cmd(ddata, cmd); |
| 213 | hw_guard_start(ddata, 120); |
| 214 | } |
| 215 | |
| 216 | static void set_display_state(struct panel_drv_data *ddata, int enabled) |
| 217 | { |
| 218 | int cmd = enabled ? MIPID_CMD_DISP_ON : MIPID_CMD_DISP_OFF; |
| 219 | |
| 220 | acx565akm_cmd(ddata, cmd); |
| 221 | } |
| 222 | |
| 223 | static int panel_enabled(struct panel_drv_data *ddata) |
| 224 | { |
| 225 | u32 disp_status; |
| 226 | int enabled; |
| 227 | |
| 228 | acx565akm_read(ddata, MIPID_CMD_READ_DISP_STATUS, |
| 229 | (u8 *)&disp_status, 4); |
| 230 | disp_status = __be32_to_cpu(disp_status); |
| 231 | enabled = (disp_status & (1 << 17)) && (disp_status & (1 << 10)); |
| 232 | dev_dbg(&ddata->spi->dev, |
| 233 | "LCD panel %senabled by bootloader (status 0x%04x)\n", |
| 234 | enabled ? "" : "not ", disp_status); |
| 235 | return enabled; |
| 236 | } |
| 237 | |
| 238 | static int panel_detect(struct panel_drv_data *ddata) |
| 239 | { |
| 240 | acx565akm_read(ddata, MIPID_CMD_READ_DISP_ID, ddata->display_id, 3); |
| 241 | dev_dbg(&ddata->spi->dev, "MIPI display ID: %02x%02x%02x\n", |
| 242 | ddata->display_id[0], |
| 243 | ddata->display_id[1], |
| 244 | ddata->display_id[2]); |
| 245 | |
| 246 | switch (ddata->display_id[0]) { |
| 247 | case 0x10: |
| 248 | ddata->model = MIPID_VER_ACX565AKM; |
| 249 | ddata->name = "acx565akm"; |
| 250 | ddata->has_bc = 1; |
| 251 | ddata->has_cabc = 1; |
| 252 | break; |
| 253 | case 0x29: |
| 254 | ddata->model = MIPID_VER_L4F00311; |
| 255 | ddata->name = "l4f00311"; |
| 256 | break; |
| 257 | case 0x45: |
| 258 | ddata->model = MIPID_VER_LPH8923; |
| 259 | ddata->name = "lph8923"; |
| 260 | break; |
| 261 | case 0x83: |
| 262 | ddata->model = MIPID_VER_LS041Y3; |
| 263 | ddata->name = "ls041y3"; |
| 264 | break; |
| 265 | default: |
| 266 | ddata->name = "unknown"; |
| 267 | dev_err(&ddata->spi->dev, "invalid display ID\n"); |
| 268 | return -ENODEV; |
| 269 | } |
| 270 | |
| 271 | ddata->revision = ddata->display_id[1]; |
| 272 | |
| 273 | dev_info(&ddata->spi->dev, "omapfb: %s rev %02x LCD detected\n", |
| 274 | ddata->name, ddata->revision); |
| 275 | |
| 276 | return 0; |
| 277 | } |
| 278 | |
| 279 | /*----------------------Backlight Control-------------------------*/ |
| 280 | |
| 281 | static void enable_backlight_ctrl(struct panel_drv_data *ddata, int enable) |
| 282 | { |
| 283 | u16 ctrl; |
| 284 | |
| 285 | acx565akm_read(ddata, MIPID_CMD_READ_CTRL_DISP, (u8 *)&ctrl, 1); |
| 286 | if (enable) { |
| 287 | ctrl |= CTRL_DISP_BRIGHTNESS_CTRL_ON | |
| 288 | CTRL_DISP_BACKLIGHT_ON; |
| 289 | } else { |
| 290 | ctrl &= ~(CTRL_DISP_BRIGHTNESS_CTRL_ON | |
| 291 | CTRL_DISP_BACKLIGHT_ON); |
| 292 | } |
| 293 | |
| 294 | ctrl |= 1 << 8; |
| 295 | acx565akm_write(ddata, MIPID_CMD_WRITE_CTRL_DISP, (u8 *)&ctrl, 2); |
| 296 | } |
| 297 | |
| 298 | static void set_cabc_mode(struct panel_drv_data *ddata, unsigned mode) |
| 299 | { |
| 300 | u16 cabc_ctrl; |
| 301 | |
| 302 | ddata->cabc_mode = mode; |
| 303 | if (!ddata->enabled) |
| 304 | return; |
| 305 | cabc_ctrl = 0; |
| 306 | acx565akm_read(ddata, MIPID_CMD_READ_CABC, (u8 *)&cabc_ctrl, 1); |
| 307 | cabc_ctrl &= ~3; |
| 308 | cabc_ctrl |= (1 << 8) | (mode & 3); |
| 309 | acx565akm_write(ddata, MIPID_CMD_WRITE_CABC, (u8 *)&cabc_ctrl, 2); |
| 310 | } |
| 311 | |
| 312 | static unsigned get_cabc_mode(struct panel_drv_data *ddata) |
| 313 | { |
| 314 | return ddata->cabc_mode; |
| 315 | } |
| 316 | |
| 317 | static unsigned get_hw_cabc_mode(struct panel_drv_data *ddata) |
| 318 | { |
| 319 | u8 cabc_ctrl; |
| 320 | |
| 321 | acx565akm_read(ddata, MIPID_CMD_READ_CABC, &cabc_ctrl, 1); |
| 322 | return cabc_ctrl & 3; |
| 323 | } |
| 324 | |
| 325 | static void acx565akm_set_brightness(struct panel_drv_data *ddata, int level) |
| 326 | { |
| 327 | int bv; |
| 328 | |
| 329 | bv = level | (1 << 8); |
| 330 | acx565akm_write(ddata, MIPID_CMD_WRITE_DISP_BRIGHTNESS, (u8 *)&bv, 2); |
| 331 | |
| 332 | if (level) |
| 333 | enable_backlight_ctrl(ddata, 1); |
| 334 | else |
| 335 | enable_backlight_ctrl(ddata, 0); |
| 336 | } |
| 337 | |
| 338 | static int acx565akm_get_actual_brightness(struct panel_drv_data *ddata) |
| 339 | { |
| 340 | u8 bv; |
| 341 | |
| 342 | acx565akm_read(ddata, MIPID_CMD_READ_DISP_BRIGHTNESS, &bv, 1); |
| 343 | |
| 344 | return bv; |
| 345 | } |
| 346 | |
| 347 | |
| 348 | static int acx565akm_bl_update_status(struct backlight_device *dev) |
| 349 | { |
| 350 | struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev); |
| 351 | int level; |
| 352 | |
| 353 | dev_dbg(&ddata->spi->dev, "%s\n", __func__); |
| 354 | |
| 355 | if (dev->props.fb_blank == FB_BLANK_UNBLANK && |
| 356 | dev->props.power == FB_BLANK_UNBLANK) |
| 357 | level = dev->props.brightness; |
| 358 | else |
| 359 | level = 0; |
| 360 | |
| 361 | if (ddata->has_bc) |
| 362 | acx565akm_set_brightness(ddata, level); |
| 363 | else |
| 364 | return -ENODEV; |
| 365 | |
| 366 | return 0; |
| 367 | } |
| 368 | |
| 369 | static int acx565akm_bl_get_intensity(struct backlight_device *dev) |
| 370 | { |
| 371 | struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev); |
| 372 | |
| 373 | dev_dbg(&dev->dev, "%s\n", __func__); |
| 374 | |
| 375 | if (!ddata->has_bc) |
| 376 | return -ENODEV; |
| 377 | |
| 378 | if (dev->props.fb_blank == FB_BLANK_UNBLANK && |
| 379 | dev->props.power == FB_BLANK_UNBLANK) { |
| 380 | if (ddata->has_bc) |
| 381 | return acx565akm_get_actual_brightness(ddata); |
| 382 | else |
| 383 | return dev->props.brightness; |
| 384 | } |
| 385 | |
| 386 | return 0; |
| 387 | } |
| 388 | |
| 389 | static int acx565akm_bl_update_status_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_update_status(dev); |
| 396 | mutex_unlock(&ddata->mutex); |
| 397 | |
| 398 | return r; |
| 399 | } |
| 400 | |
| 401 | static int acx565akm_bl_get_intensity_locked(struct backlight_device *dev) |
| 402 | { |
| 403 | struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev); |
| 404 | int r; |
| 405 | |
| 406 | mutex_lock(&ddata->mutex); |
| 407 | r = acx565akm_bl_get_intensity(dev); |
| 408 | mutex_unlock(&ddata->mutex); |
| 409 | |
| 410 | return r; |
| 411 | } |
| 412 | |
| 413 | static const struct backlight_ops acx565akm_bl_ops = { |
| 414 | .get_brightness = acx565akm_bl_get_intensity_locked, |
| 415 | .update_status = acx565akm_bl_update_status_locked, |
| 416 | }; |
| 417 | |
| 418 | /*--------------------Auto Brightness control via Sysfs---------------------*/ |
| 419 | |
| 420 | static const char * const cabc_modes[] = { |
| 421 | "off", /* always used when CABC is not supported */ |
| 422 | "ui", |
| 423 | "still-image", |
| 424 | "moving-image", |
| 425 | }; |
| 426 | |
| 427 | static ssize_t show_cabc_mode(struct device *dev, |
| 428 | struct device_attribute *attr, |
| 429 | char *buf) |
| 430 | { |
| 431 | struct panel_drv_data *ddata = dev_get_drvdata(dev); |
| 432 | const char *mode_str; |
| 433 | int mode; |
| 434 | int len; |
| 435 | |
| 436 | if (!ddata->has_cabc) |
| 437 | mode = 0; |
| 438 | else |
| 439 | mode = get_cabc_mode(ddata); |
| 440 | mode_str = "unknown"; |
| 441 | if (mode >= 0 && mode < ARRAY_SIZE(cabc_modes)) |
| 442 | mode_str = cabc_modes[mode]; |
| 443 | len = snprintf(buf, PAGE_SIZE, "%s\n", mode_str); |
| 444 | |
| 445 | return len < PAGE_SIZE - 1 ? len : PAGE_SIZE - 1; |
| 446 | } |
| 447 | |
| 448 | static ssize_t store_cabc_mode(struct device *dev, |
| 449 | struct device_attribute *attr, |
| 450 | const char *buf, size_t count) |
| 451 | { |
| 452 | struct panel_drv_data *ddata = dev_get_drvdata(dev); |
| 453 | int i; |
| 454 | |
| 455 | for (i = 0; i < ARRAY_SIZE(cabc_modes); i++) { |
| 456 | const char *mode_str = cabc_modes[i]; |
| 457 | int cmp_len = strlen(mode_str); |
| 458 | |
| 459 | if (count > 0 && buf[count - 1] == '\n') |
| 460 | count--; |
| 461 | if (count != cmp_len) |
| 462 | continue; |
| 463 | |
| 464 | if (strncmp(buf, mode_str, cmp_len) == 0) |
| 465 | break; |
| 466 | } |
| 467 | |
| 468 | if (i == ARRAY_SIZE(cabc_modes)) |
| 469 | return -EINVAL; |
| 470 | |
| 471 | if (!ddata->has_cabc && i != 0) |
| 472 | return -EINVAL; |
| 473 | |
| 474 | mutex_lock(&ddata->mutex); |
| 475 | set_cabc_mode(ddata, i); |
| 476 | mutex_unlock(&ddata->mutex); |
| 477 | |
| 478 | return count; |
| 479 | } |
| 480 | |
| 481 | static ssize_t show_cabc_available_modes(struct device *dev, |
| 482 | struct device_attribute *attr, |
| 483 | char *buf) |
| 484 | { |
| 485 | struct panel_drv_data *ddata = dev_get_drvdata(dev); |
| 486 | int len; |
| 487 | int i; |
| 488 | |
| 489 | if (!ddata->has_cabc) |
| 490 | return snprintf(buf, PAGE_SIZE, "%s\n", cabc_modes[0]); |
| 491 | |
| 492 | for (i = 0, len = 0; |
| 493 | len < PAGE_SIZE && i < ARRAY_SIZE(cabc_modes); i++) |
| 494 | len += snprintf(&buf[len], PAGE_SIZE - len, "%s%s%s", |
| 495 | i ? " " : "", cabc_modes[i], |
| 496 | i == ARRAY_SIZE(cabc_modes) - 1 ? "\n" : ""); |
| 497 | |
| 498 | return len < PAGE_SIZE ? len : PAGE_SIZE - 1; |
| 499 | } |
| 500 | |
| 501 | static DEVICE_ATTR(cabc_mode, S_IRUGO | S_IWUSR, |
| 502 | show_cabc_mode, store_cabc_mode); |
| 503 | static DEVICE_ATTR(cabc_available_modes, S_IRUGO, |
| 504 | show_cabc_available_modes, NULL); |
| 505 | |
| 506 | static struct attribute *bldev_attrs[] = { |
| 507 | &dev_attr_cabc_mode.attr, |
| 508 | &dev_attr_cabc_available_modes.attr, |
| 509 | NULL, |
| 510 | }; |
| 511 | |
| 512 | static struct attribute_group bldev_attr_group = { |
| 513 | .attrs = bldev_attrs, |
| 514 | }; |
| 515 | |
| 516 | static int acx565akm_connect(struct omap_dss_device *dssdev) |
| 517 | { |
| 518 | struct panel_drv_data *ddata = to_panel_data(dssdev); |
| 519 | struct omap_dss_device *in = ddata->in; |
| 520 | int r; |
| 521 | |
| 522 | if (omapdss_device_is_connected(dssdev)) |
| 523 | return 0; |
| 524 | |
| 525 | r = in->ops.sdi->connect(in, dssdev); |
| 526 | if (r) |
| 527 | return r; |
| 528 | |
| 529 | return 0; |
| 530 | } |
| 531 | |
| 532 | static void acx565akm_disconnect(struct omap_dss_device *dssdev) |
| 533 | { |
| 534 | struct panel_drv_data *ddata = to_panel_data(dssdev); |
| 535 | struct omap_dss_device *in = ddata->in; |
| 536 | |
| 537 | if (!omapdss_device_is_connected(dssdev)) |
| 538 | return; |
| 539 | |
| 540 | in->ops.sdi->disconnect(in, dssdev); |
| 541 | } |
| 542 | |
| 543 | static int acx565akm_panel_power_on(struct omap_dss_device *dssdev) |
| 544 | { |
| 545 | struct panel_drv_data *ddata = to_panel_data(dssdev); |
| 546 | struct omap_dss_device *in = ddata->in; |
| 547 | int r; |
| 548 | |
| 549 | dev_dbg(&ddata->spi->dev, "%s\n", __func__); |
| 550 | |
| 551 | in->ops.sdi->set_timings(in, &ddata->videomode); |
| 552 | |
| 553 | if (ddata->datapairs > 0) |
| 554 | in->ops.sdi->set_datapairs(in, ddata->datapairs); |
| 555 | |
| 556 | r = in->ops.sdi->enable(in); |
| 557 | if (r) { |
| 558 | pr_err("%s sdi enable failed\n", __func__); |
| 559 | return r; |
| 560 | } |
| 561 | |
| 562 | /*FIXME tweak me */ |
| 563 | msleep(50); |
| 564 | |
| 565 | if (gpio_is_valid(ddata->reset_gpio)) |
| 566 | gpio_set_value(ddata->reset_gpio, 1); |
| 567 | |
| 568 | if (ddata->enabled) { |
| 569 | dev_dbg(&ddata->spi->dev, "panel already enabled\n"); |
| 570 | return 0; |
| 571 | } |
| 572 | |
| 573 | /* |
| 574 | * We have to meet all the following delay requirements: |
| 575 | * 1. tRW: reset pulse width 10usec (7.12.1) |
| 576 | * 2. tRT: reset cancel time 5msec (7.12.1) |
| 577 | * 3. Providing PCLK,HS,VS signals for 2 frames = ~50msec worst |
| 578 | * case (7.6.2) |
| 579 | * 4. 120msec before the sleep out command (7.12.1) |
| 580 | */ |
| 581 | msleep(120); |
| 582 | |
| 583 | set_sleep_mode(ddata, 0); |
| 584 | ddata->enabled = 1; |
| 585 | |
| 586 | /* 5msec between sleep out and the next command. (8.2.16) */ |
| 587 | usleep_range(5000, 10000); |
| 588 | set_display_state(ddata, 1); |
| 589 | set_cabc_mode(ddata, ddata->cabc_mode); |
| 590 | |
| 591 | return acx565akm_bl_update_status(ddata->bl_dev); |
| 592 | } |
| 593 | |
| 594 | static void acx565akm_panel_power_off(struct omap_dss_device *dssdev) |
| 595 | { |
| 596 | struct panel_drv_data *ddata = to_panel_data(dssdev); |
| 597 | struct omap_dss_device *in = ddata->in; |
| 598 | |
| 599 | dev_dbg(dssdev->dev, "%s\n", __func__); |
| 600 | |
| 601 | if (!ddata->enabled) |
| 602 | return; |
| 603 | |
| 604 | set_display_state(ddata, 0); |
| 605 | set_sleep_mode(ddata, 1); |
| 606 | ddata->enabled = 0; |
| 607 | /* |
| 608 | * We have to provide PCLK,HS,VS signals for 2 frames (worst case |
| 609 | * ~50msec) after sending the sleep in command and asserting the |
| 610 | * reset signal. We probably could assert the reset w/o the delay |
| 611 | * but we still delay to avoid possible artifacts. (7.6.1) |
| 612 | */ |
| 613 | msleep(50); |
| 614 | |
| 615 | if (gpio_is_valid(ddata->reset_gpio)) |
| 616 | gpio_set_value(ddata->reset_gpio, 0); |
| 617 | |
| 618 | /* FIXME need to tweak this delay */ |
| 619 | msleep(100); |
| 620 | |
| 621 | in->ops.sdi->disable(in); |
| 622 | } |
| 623 | |
| 624 | static int acx565akm_enable(struct omap_dss_device *dssdev) |
| 625 | { |
| 626 | struct panel_drv_data *ddata = to_panel_data(dssdev); |
| 627 | int r; |
| 628 | |
| 629 | dev_dbg(dssdev->dev, "%s\n", __func__); |
| 630 | |
| 631 | if (!omapdss_device_is_connected(dssdev)) |
| 632 | return -ENODEV; |
| 633 | |
| 634 | if (omapdss_device_is_enabled(dssdev)) |
| 635 | return 0; |
| 636 | |
| 637 | mutex_lock(&ddata->mutex); |
| 638 | r = acx565akm_panel_power_on(dssdev); |
| 639 | mutex_unlock(&ddata->mutex); |
| 640 | if (r) |
| 641 | return r; |
| 642 | |
| 643 | dssdev->state = OMAP_DSS_DISPLAY_ACTIVE; |
| 644 | |
| 645 | return 0; |
| 646 | } |
| 647 | |
| 648 | static void acx565akm_disable(struct omap_dss_device *dssdev) |
| 649 | { |
| 650 | struct panel_drv_data *ddata = to_panel_data(dssdev); |
| 651 | |
| 652 | dev_dbg(dssdev->dev, "%s\n", __func__); |
| 653 | |
| 654 | if (!omapdss_device_is_enabled(dssdev)) |
| 655 | return; |
| 656 | |
| 657 | mutex_lock(&ddata->mutex); |
| 658 | acx565akm_panel_power_off(dssdev); |
| 659 | mutex_unlock(&ddata->mutex); |
| 660 | |
| 661 | dssdev->state = OMAP_DSS_DISPLAY_DISABLED; |
| 662 | } |
| 663 | |
| 664 | static void acx565akm_set_timings(struct omap_dss_device *dssdev, |
| 665 | struct omap_video_timings *timings) |
| 666 | { |
| 667 | struct panel_drv_data *ddata = to_panel_data(dssdev); |
| 668 | struct omap_dss_device *in = ddata->in; |
| 669 | |
| 670 | ddata->videomode = *timings; |
| 671 | dssdev->panel.timings = *timings; |
| 672 | |
| 673 | in->ops.sdi->set_timings(in, timings); |
| 674 | } |
| 675 | |
| 676 | static void acx565akm_get_timings(struct omap_dss_device *dssdev, |
| 677 | struct omap_video_timings *timings) |
| 678 | { |
| 679 | struct panel_drv_data *ddata = to_panel_data(dssdev); |
| 680 | |
| 681 | *timings = ddata->videomode; |
| 682 | } |
| 683 | |
| 684 | static int acx565akm_check_timings(struct omap_dss_device *dssdev, |
| 685 | struct omap_video_timings *timings) |
| 686 | { |
| 687 | struct panel_drv_data *ddata = to_panel_data(dssdev); |
| 688 | struct omap_dss_device *in = ddata->in; |
| 689 | |
| 690 | return in->ops.sdi->check_timings(in, timings); |
| 691 | } |
| 692 | |
| 693 | static struct omap_dss_driver acx565akm_ops = { |
| 694 | .connect = acx565akm_connect, |
| 695 | .disconnect = acx565akm_disconnect, |
| 696 | |
| 697 | .enable = acx565akm_enable, |
| 698 | .disable = acx565akm_disable, |
| 699 | |
| 700 | .set_timings = acx565akm_set_timings, |
| 701 | .get_timings = acx565akm_get_timings, |
| 702 | .check_timings = acx565akm_check_timings, |
| 703 | |
| 704 | .get_resolution = omapdss_default_get_resolution, |
| 705 | }; |
| 706 | |
| 707 | static int acx565akm_probe_pdata(struct spi_device *spi) |
| 708 | { |
| 709 | const struct panel_acx565akm_platform_data *pdata; |
| 710 | struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev); |
| 711 | struct omap_dss_device *dssdev, *in; |
| 712 | |
| 713 | pdata = dev_get_platdata(&spi->dev); |
| 714 | |
| 715 | ddata->reset_gpio = pdata->reset_gpio; |
| 716 | |
| 717 | in = omap_dss_find_output(pdata->source); |
| 718 | if (in == NULL) { |
| 719 | dev_err(&spi->dev, "failed to find video source '%s'\n", |
| 720 | pdata->source); |
| 721 | return -EPROBE_DEFER; |
| 722 | } |
| 723 | ddata->in = in; |
| 724 | |
| 725 | ddata->datapairs = pdata->datapairs; |
| 726 | |
| 727 | dssdev = &ddata->dssdev; |
| 728 | dssdev->name = pdata->name; |
| 729 | |
| 730 | return 0; |
| 731 | } |
| 732 | |
| 733 | static int acx565akm_probe_of(struct spi_device *spi) |
| 734 | { |
| 735 | struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev); |
| 736 | struct device_node *np = spi->dev.of_node; |
| 737 | |
| 738 | ddata->reset_gpio = of_get_named_gpio(np, "reset-gpios", 0); |
| 739 | |
| 740 | ddata->in = omapdss_of_find_source_for_first_ep(np); |
| 741 | if (IS_ERR(ddata->in)) { |
| 742 | dev_err(&spi->dev, "failed to find video source\n"); |
| 743 | return PTR_ERR(ddata->in); |
| 744 | } |
| 745 | |
| 746 | return 0; |
| 747 | } |
| 748 | |
| 749 | static int acx565akm_probe(struct spi_device *spi) |
| 750 | { |
| 751 | struct panel_drv_data *ddata; |
| 752 | struct omap_dss_device *dssdev; |
| 753 | struct backlight_device *bldev; |
| 754 | int max_brightness, brightness; |
| 755 | struct backlight_properties props; |
| 756 | int r; |
| 757 | |
| 758 | dev_dbg(&spi->dev, "%s\n", __func__); |
| 759 | |
| 760 | spi->mode = SPI_MODE_3; |
| 761 | |
| 762 | ddata = devm_kzalloc(&spi->dev, sizeof(*ddata), GFP_KERNEL); |
| 763 | if (ddata == NULL) |
| 764 | return -ENOMEM; |
| 765 | |
| 766 | dev_set_drvdata(&spi->dev, ddata); |
| 767 | |
| 768 | ddata->spi = spi; |
| 769 | |
| 770 | mutex_init(&ddata->mutex); |
| 771 | |
| 772 | if (dev_get_platdata(&spi->dev)) { |
| 773 | r = acx565akm_probe_pdata(spi); |
| 774 | if (r) |
| 775 | return r; |
| 776 | } else if (spi->dev.of_node) { |
| 777 | r = acx565akm_probe_of(spi); |
| 778 | if (r) |
| 779 | return r; |
| 780 | } else { |
| 781 | dev_err(&spi->dev, "platform data missing!\n"); |
| 782 | return -ENODEV; |
| 783 | } |
| 784 | |
| 785 | if (gpio_is_valid(ddata->reset_gpio)) { |
| 786 | r = devm_gpio_request_one(&spi->dev, ddata->reset_gpio, |
| 787 | GPIOF_OUT_INIT_LOW, "lcd reset"); |
| 788 | if (r) |
| 789 | goto err_gpio; |
| 790 | } |
| 791 | |
| 792 | if (gpio_is_valid(ddata->reset_gpio)) |
| 793 | gpio_set_value(ddata->reset_gpio, 1); |
| 794 | |
| 795 | /* |
| 796 | * After reset we have to wait 5 msec before the first |
| 797 | * command can be sent. |
| 798 | */ |
| 799 | usleep_range(5000, 10000); |
| 800 | |
| 801 | ddata->enabled = panel_enabled(ddata); |
| 802 | |
| 803 | r = panel_detect(ddata); |
| 804 | |
| 805 | if (!ddata->enabled && gpio_is_valid(ddata->reset_gpio)) |
| 806 | gpio_set_value(ddata->reset_gpio, 0); |
| 807 | |
| 808 | if (r) { |
| 809 | dev_err(&spi->dev, "%s panel detect error\n", __func__); |
| 810 | goto err_detect; |
| 811 | } |
| 812 | |
| 813 | memset(&props, 0, sizeof(props)); |
| 814 | props.fb_blank = FB_BLANK_UNBLANK; |
| 815 | props.power = FB_BLANK_UNBLANK; |
| 816 | props.type = BACKLIGHT_RAW; |
| 817 | |
| 818 | bldev = backlight_device_register("acx565akm", &ddata->spi->dev, |
| 819 | ddata, &acx565akm_bl_ops, &props); |
| 820 | if (IS_ERR(bldev)) { |
| 821 | r = PTR_ERR(bldev); |
| 822 | goto err_reg_bl; |
| 823 | } |
| 824 | ddata->bl_dev = bldev; |
| 825 | if (ddata->has_cabc) { |
| 826 | r = sysfs_create_group(&bldev->dev.kobj, &bldev_attr_group); |
| 827 | if (r) { |
| 828 | dev_err(&bldev->dev, |
| 829 | "%s failed to create sysfs files\n", __func__); |
| 830 | goto err_sysfs; |
| 831 | } |
| 832 | ddata->cabc_mode = get_hw_cabc_mode(ddata); |
| 833 | } |
| 834 | |
| 835 | max_brightness = 255; |
| 836 | |
| 837 | if (ddata->has_bc) |
| 838 | brightness = acx565akm_get_actual_brightness(ddata); |
| 839 | else |
| 840 | brightness = 0; |
| 841 | |
| 842 | bldev->props.max_brightness = max_brightness; |
| 843 | bldev->props.brightness = brightness; |
| 844 | |
| 845 | acx565akm_bl_update_status(bldev); |
| 846 | |
| 847 | |
| 848 | ddata->videomode = acx565akm_panel_timings; |
| 849 | |
| 850 | dssdev = &ddata->dssdev; |
| 851 | dssdev->dev = &spi->dev; |
| 852 | dssdev->driver = &acx565akm_ops; |
| 853 | dssdev->type = OMAP_DISPLAY_TYPE_SDI; |
| 854 | dssdev->owner = THIS_MODULE; |
| 855 | dssdev->panel.timings = ddata->videomode; |
| 856 | |
| 857 | r = omapdss_register_display(dssdev); |
| 858 | if (r) { |
| 859 | dev_err(&spi->dev, "Failed to register panel\n"); |
| 860 | goto err_reg; |
| 861 | } |
| 862 | |
| 863 | return 0; |
| 864 | |
| 865 | err_reg: |
| 866 | sysfs_remove_group(&bldev->dev.kobj, &bldev_attr_group); |
| 867 | err_sysfs: |
| 868 | backlight_device_unregister(bldev); |
| 869 | err_reg_bl: |
| 870 | err_detect: |
| 871 | err_gpio: |
| 872 | omap_dss_put_device(ddata->in); |
| 873 | return r; |
| 874 | } |
| 875 | |
| 876 | static int acx565akm_remove(struct spi_device *spi) |
| 877 | { |
| 878 | struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev); |
| 879 | struct omap_dss_device *dssdev = &ddata->dssdev; |
| 880 | struct omap_dss_device *in = ddata->in; |
| 881 | |
| 882 | dev_dbg(&ddata->spi->dev, "%s\n", __func__); |
| 883 | |
| 884 | sysfs_remove_group(&ddata->bl_dev->dev.kobj, &bldev_attr_group); |
| 885 | backlight_device_unregister(ddata->bl_dev); |
| 886 | |
| 887 | omapdss_unregister_display(dssdev); |
| 888 | |
| 889 | acx565akm_disable(dssdev); |
| 890 | acx565akm_disconnect(dssdev); |
| 891 | |
| 892 | omap_dss_put_device(in); |
| 893 | |
| 894 | return 0; |
| 895 | } |
| 896 | |
| 897 | static const struct of_device_id acx565akm_of_match[] = { |
| 898 | { .compatible = "omapdss,sony,acx565akm", }, |
| 899 | {}, |
| 900 | }; |
| 901 | MODULE_DEVICE_TABLE(of, acx565akm_of_match); |
| 902 | |
| 903 | static struct spi_driver acx565akm_driver = { |
| 904 | .driver = { |
| 905 | .name = "acx565akm", |
| 906 | .of_match_table = acx565akm_of_match, |
| 907 | .suppress_bind_attrs = true, |
| 908 | }, |
| 909 | .probe = acx565akm_probe, |
| 910 | .remove = acx565akm_remove, |
| 911 | }; |
| 912 | |
| 913 | module_spi_driver(acx565akm_driver); |
| 914 | |
| 915 | MODULE_AUTHOR("Nokia Corporation"); |
| 916 | MODULE_DESCRIPTION("acx565akm LCD Driver"); |
| 917 | MODULE_LICENSE("GPL"); |