Tomi Valkeinen | f76ee89 | 2015-12-09 18:28:28 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Generic DSI Command Mode panel driver |
| 3 | * |
| 4 | * Copyright (C) 2013 Texas Instruments |
| 5 | * Author: Tomi Valkeinen <tomi.valkeinen@ti.com> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify it |
| 8 | * under the terms of the GNU General Public License version 2 as published by |
| 9 | * the Free Software Foundation. |
| 10 | */ |
| 11 | |
| 12 | /* #define DEBUG */ |
| 13 | |
| 14 | #include <linux/backlight.h> |
| 15 | #include <linux/delay.h> |
| 16 | #include <linux/fb.h> |
| 17 | #include <linux/gpio.h> |
| 18 | #include <linux/interrupt.h> |
| 19 | #include <linux/jiffies.h> |
| 20 | #include <linux/module.h> |
| 21 | #include <linux/platform_device.h> |
Ingo Molnar | 174cd4b | 2017-02-02 19:15:33 +0100 | [diff] [blame] | 22 | #include <linux/sched/signal.h> |
Tomi Valkeinen | f76ee89 | 2015-12-09 18:28:28 +0200 | [diff] [blame] | 23 | #include <linux/slab.h> |
| 24 | #include <linux/workqueue.h> |
| 25 | #include <linux/of_device.h> |
| 26 | #include <linux/of_gpio.h> |
| 27 | |
Peter Ujfalusi | 62d9e44 | 2016-05-31 11:43:12 +0300 | [diff] [blame] | 28 | #include <video/omapfb_dss.h> |
Tomi Valkeinen | f76ee89 | 2015-12-09 18:28:28 +0200 | [diff] [blame] | 29 | #include <video/mipi_display.h> |
| 30 | |
| 31 | /* DSI Virtual channel. Hardcoded for now. */ |
| 32 | #define TCH 0 |
| 33 | |
| 34 | #define DCS_READ_NUM_ERRORS 0x05 |
| 35 | #define DCS_BRIGHTNESS 0x51 |
| 36 | #define DCS_CTRL_DISPLAY 0x53 |
| 37 | #define DCS_GET_ID1 0xda |
| 38 | #define DCS_GET_ID2 0xdb |
| 39 | #define DCS_GET_ID3 0xdc |
| 40 | |
| 41 | struct panel_drv_data { |
| 42 | struct omap_dss_device dssdev; |
| 43 | struct omap_dss_device *in; |
| 44 | |
| 45 | struct omap_video_timings timings; |
| 46 | |
| 47 | struct platform_device *pdev; |
| 48 | |
| 49 | struct mutex lock; |
| 50 | |
| 51 | struct backlight_device *bldev; |
| 52 | |
| 53 | unsigned long hw_guard_end; /* next value of jiffies when we can |
| 54 | * issue the next sleep in/out command |
| 55 | */ |
| 56 | unsigned long hw_guard_wait; /* max guard time in jiffies */ |
| 57 | |
| 58 | /* panel HW configuration from DT or platform data */ |
| 59 | int reset_gpio; |
| 60 | int ext_te_gpio; |
| 61 | |
| 62 | bool use_dsi_backlight; |
| 63 | |
| 64 | struct omap_dsi_pin_config pin_config; |
| 65 | |
| 66 | /* runtime variables */ |
| 67 | bool enabled; |
| 68 | |
| 69 | bool te_enabled; |
| 70 | |
| 71 | atomic_t do_update; |
| 72 | int channel; |
| 73 | |
| 74 | struct delayed_work te_timeout_work; |
| 75 | |
| 76 | bool intro_printed; |
| 77 | |
Tomi Valkeinen | f76ee89 | 2015-12-09 18:28:28 +0200 | [diff] [blame] | 78 | bool ulps_enabled; |
| 79 | unsigned ulps_timeout; |
| 80 | struct delayed_work ulps_work; |
| 81 | }; |
| 82 | |
| 83 | #define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev) |
| 84 | |
| 85 | static irqreturn_t dsicm_te_isr(int irq, void *data); |
| 86 | static void dsicm_te_timeout_work_callback(struct work_struct *work); |
| 87 | static int _dsicm_enable_te(struct panel_drv_data *ddata, bool enable); |
| 88 | |
| 89 | static int dsicm_panel_reset(struct panel_drv_data *ddata); |
| 90 | |
| 91 | static void dsicm_ulps_work(struct work_struct *work); |
| 92 | |
| 93 | static void hw_guard_start(struct panel_drv_data *ddata, int guard_msec) |
| 94 | { |
| 95 | ddata->hw_guard_wait = msecs_to_jiffies(guard_msec); |
| 96 | ddata->hw_guard_end = jiffies + ddata->hw_guard_wait; |
| 97 | } |
| 98 | |
| 99 | static void hw_guard_wait(struct panel_drv_data *ddata) |
| 100 | { |
| 101 | unsigned long wait = ddata->hw_guard_end - jiffies; |
| 102 | |
| 103 | if ((long)wait > 0 && wait <= ddata->hw_guard_wait) { |
| 104 | set_current_state(TASK_UNINTERRUPTIBLE); |
| 105 | schedule_timeout(wait); |
| 106 | } |
| 107 | } |
| 108 | |
| 109 | static int dsicm_dcs_read_1(struct panel_drv_data *ddata, u8 dcs_cmd, u8 *data) |
| 110 | { |
| 111 | struct omap_dss_device *in = ddata->in; |
| 112 | int r; |
| 113 | u8 buf[1]; |
| 114 | |
| 115 | r = in->ops.dsi->dcs_read(in, ddata->channel, dcs_cmd, buf, 1); |
| 116 | |
| 117 | if (r < 0) |
| 118 | return r; |
| 119 | |
| 120 | *data = buf[0]; |
| 121 | |
| 122 | return 0; |
| 123 | } |
| 124 | |
| 125 | static int dsicm_dcs_write_0(struct panel_drv_data *ddata, u8 dcs_cmd) |
| 126 | { |
| 127 | struct omap_dss_device *in = ddata->in; |
| 128 | return in->ops.dsi->dcs_write(in, ddata->channel, &dcs_cmd, 1); |
| 129 | } |
| 130 | |
| 131 | static int dsicm_dcs_write_1(struct panel_drv_data *ddata, u8 dcs_cmd, u8 param) |
| 132 | { |
| 133 | struct omap_dss_device *in = ddata->in; |
| 134 | u8 buf[2] = { dcs_cmd, param }; |
| 135 | |
| 136 | return in->ops.dsi->dcs_write(in, ddata->channel, buf, 2); |
| 137 | } |
| 138 | |
| 139 | static int dsicm_sleep_in(struct panel_drv_data *ddata) |
| 140 | |
| 141 | { |
| 142 | struct omap_dss_device *in = ddata->in; |
| 143 | u8 cmd; |
| 144 | int r; |
| 145 | |
| 146 | hw_guard_wait(ddata); |
| 147 | |
| 148 | cmd = MIPI_DCS_ENTER_SLEEP_MODE; |
| 149 | r = in->ops.dsi->dcs_write_nosync(in, ddata->channel, &cmd, 1); |
| 150 | if (r) |
| 151 | return r; |
| 152 | |
| 153 | hw_guard_start(ddata, 120); |
| 154 | |
| 155 | usleep_range(5000, 10000); |
| 156 | |
| 157 | return 0; |
| 158 | } |
| 159 | |
| 160 | static int dsicm_sleep_out(struct panel_drv_data *ddata) |
| 161 | { |
| 162 | int r; |
| 163 | |
| 164 | hw_guard_wait(ddata); |
| 165 | |
| 166 | r = dsicm_dcs_write_0(ddata, MIPI_DCS_EXIT_SLEEP_MODE); |
| 167 | if (r) |
| 168 | return r; |
| 169 | |
| 170 | hw_guard_start(ddata, 120); |
| 171 | |
| 172 | usleep_range(5000, 10000); |
| 173 | |
| 174 | return 0; |
| 175 | } |
| 176 | |
| 177 | static int dsicm_get_id(struct panel_drv_data *ddata, u8 *id1, u8 *id2, u8 *id3) |
| 178 | { |
| 179 | int r; |
| 180 | |
| 181 | r = dsicm_dcs_read_1(ddata, DCS_GET_ID1, id1); |
| 182 | if (r) |
| 183 | return r; |
| 184 | r = dsicm_dcs_read_1(ddata, DCS_GET_ID2, id2); |
| 185 | if (r) |
| 186 | return r; |
| 187 | r = dsicm_dcs_read_1(ddata, DCS_GET_ID3, id3); |
| 188 | if (r) |
| 189 | return r; |
| 190 | |
| 191 | return 0; |
| 192 | } |
| 193 | |
| 194 | static int dsicm_set_update_window(struct panel_drv_data *ddata, |
| 195 | u16 x, u16 y, u16 w, u16 h) |
| 196 | { |
| 197 | struct omap_dss_device *in = ddata->in; |
| 198 | int r; |
| 199 | u16 x1 = x; |
| 200 | u16 x2 = x + w - 1; |
| 201 | u16 y1 = y; |
| 202 | u16 y2 = y + h - 1; |
| 203 | |
| 204 | u8 buf[5]; |
| 205 | buf[0] = MIPI_DCS_SET_COLUMN_ADDRESS; |
| 206 | buf[1] = (x1 >> 8) & 0xff; |
| 207 | buf[2] = (x1 >> 0) & 0xff; |
| 208 | buf[3] = (x2 >> 8) & 0xff; |
| 209 | buf[4] = (x2 >> 0) & 0xff; |
| 210 | |
| 211 | r = in->ops.dsi->dcs_write_nosync(in, ddata->channel, buf, sizeof(buf)); |
| 212 | if (r) |
| 213 | return r; |
| 214 | |
| 215 | buf[0] = MIPI_DCS_SET_PAGE_ADDRESS; |
| 216 | buf[1] = (y1 >> 8) & 0xff; |
| 217 | buf[2] = (y1 >> 0) & 0xff; |
| 218 | buf[3] = (y2 >> 8) & 0xff; |
| 219 | buf[4] = (y2 >> 0) & 0xff; |
| 220 | |
| 221 | r = in->ops.dsi->dcs_write_nosync(in, ddata->channel, buf, sizeof(buf)); |
| 222 | if (r) |
| 223 | return r; |
| 224 | |
| 225 | in->ops.dsi->bta_sync(in, ddata->channel); |
| 226 | |
| 227 | return r; |
| 228 | } |
| 229 | |
| 230 | static void dsicm_queue_ulps_work(struct panel_drv_data *ddata) |
| 231 | { |
| 232 | if (ddata->ulps_timeout > 0) |
Bhaktipriya Shridhar | b59ac9a | 2016-07-02 13:55:40 +0530 | [diff] [blame] | 233 | schedule_delayed_work(&ddata->ulps_work, |
Tomi Valkeinen | f76ee89 | 2015-12-09 18:28:28 +0200 | [diff] [blame] | 234 | msecs_to_jiffies(ddata->ulps_timeout)); |
| 235 | } |
| 236 | |
| 237 | static void dsicm_cancel_ulps_work(struct panel_drv_data *ddata) |
| 238 | { |
| 239 | cancel_delayed_work(&ddata->ulps_work); |
| 240 | } |
| 241 | |
| 242 | static int dsicm_enter_ulps(struct panel_drv_data *ddata) |
| 243 | { |
| 244 | struct omap_dss_device *in = ddata->in; |
| 245 | int r; |
| 246 | |
| 247 | if (ddata->ulps_enabled) |
| 248 | return 0; |
| 249 | |
| 250 | dsicm_cancel_ulps_work(ddata); |
| 251 | |
| 252 | r = _dsicm_enable_te(ddata, false); |
| 253 | if (r) |
| 254 | goto err; |
| 255 | |
| 256 | if (gpio_is_valid(ddata->ext_te_gpio)) |
| 257 | disable_irq(gpio_to_irq(ddata->ext_te_gpio)); |
| 258 | |
| 259 | in->ops.dsi->disable(in, false, true); |
| 260 | |
| 261 | ddata->ulps_enabled = true; |
| 262 | |
| 263 | return 0; |
| 264 | |
| 265 | err: |
| 266 | dev_err(&ddata->pdev->dev, "enter ULPS failed"); |
| 267 | dsicm_panel_reset(ddata); |
| 268 | |
| 269 | ddata->ulps_enabled = false; |
| 270 | |
| 271 | dsicm_queue_ulps_work(ddata); |
| 272 | |
| 273 | return r; |
| 274 | } |
| 275 | |
| 276 | static int dsicm_exit_ulps(struct panel_drv_data *ddata) |
| 277 | { |
| 278 | struct omap_dss_device *in = ddata->in; |
| 279 | int r; |
| 280 | |
| 281 | if (!ddata->ulps_enabled) |
| 282 | return 0; |
| 283 | |
| 284 | r = in->ops.dsi->enable(in); |
| 285 | if (r) { |
| 286 | dev_err(&ddata->pdev->dev, "failed to enable DSI\n"); |
| 287 | goto err1; |
| 288 | } |
| 289 | |
| 290 | in->ops.dsi->enable_hs(in, ddata->channel, true); |
| 291 | |
| 292 | r = _dsicm_enable_te(ddata, true); |
| 293 | if (r) { |
| 294 | dev_err(&ddata->pdev->dev, "failed to re-enable TE"); |
| 295 | goto err2; |
| 296 | } |
| 297 | |
| 298 | if (gpio_is_valid(ddata->ext_te_gpio)) |
| 299 | enable_irq(gpio_to_irq(ddata->ext_te_gpio)); |
| 300 | |
| 301 | dsicm_queue_ulps_work(ddata); |
| 302 | |
| 303 | ddata->ulps_enabled = false; |
| 304 | |
| 305 | return 0; |
| 306 | |
| 307 | err2: |
| 308 | dev_err(&ddata->pdev->dev, "failed to exit ULPS"); |
| 309 | |
| 310 | r = dsicm_panel_reset(ddata); |
| 311 | if (!r) { |
| 312 | if (gpio_is_valid(ddata->ext_te_gpio)) |
| 313 | enable_irq(gpio_to_irq(ddata->ext_te_gpio)); |
| 314 | ddata->ulps_enabled = false; |
| 315 | } |
| 316 | err1: |
| 317 | dsicm_queue_ulps_work(ddata); |
| 318 | |
| 319 | return r; |
| 320 | } |
| 321 | |
| 322 | static int dsicm_wake_up(struct panel_drv_data *ddata) |
| 323 | { |
| 324 | if (ddata->ulps_enabled) |
| 325 | return dsicm_exit_ulps(ddata); |
| 326 | |
| 327 | dsicm_cancel_ulps_work(ddata); |
| 328 | dsicm_queue_ulps_work(ddata); |
| 329 | return 0; |
| 330 | } |
| 331 | |
| 332 | static int dsicm_bl_update_status(struct backlight_device *dev) |
| 333 | { |
| 334 | struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev); |
| 335 | struct omap_dss_device *in = ddata->in; |
| 336 | int r; |
| 337 | int level; |
| 338 | |
| 339 | if (dev->props.fb_blank == FB_BLANK_UNBLANK && |
| 340 | dev->props.power == FB_BLANK_UNBLANK) |
| 341 | level = dev->props.brightness; |
| 342 | else |
| 343 | level = 0; |
| 344 | |
| 345 | dev_dbg(&ddata->pdev->dev, "update brightness to %d\n", level); |
| 346 | |
| 347 | mutex_lock(&ddata->lock); |
| 348 | |
| 349 | if (ddata->enabled) { |
| 350 | in->ops.dsi->bus_lock(in); |
| 351 | |
| 352 | r = dsicm_wake_up(ddata); |
| 353 | if (!r) |
| 354 | r = dsicm_dcs_write_1(ddata, DCS_BRIGHTNESS, level); |
| 355 | |
| 356 | in->ops.dsi->bus_unlock(in); |
| 357 | } else { |
| 358 | r = 0; |
| 359 | } |
| 360 | |
| 361 | mutex_unlock(&ddata->lock); |
| 362 | |
| 363 | return r; |
| 364 | } |
| 365 | |
| 366 | static int dsicm_bl_get_intensity(struct backlight_device *dev) |
| 367 | { |
| 368 | if (dev->props.fb_blank == FB_BLANK_UNBLANK && |
| 369 | dev->props.power == FB_BLANK_UNBLANK) |
| 370 | return dev->props.brightness; |
| 371 | |
| 372 | return 0; |
| 373 | } |
| 374 | |
| 375 | static const struct backlight_ops dsicm_bl_ops = { |
| 376 | .get_brightness = dsicm_bl_get_intensity, |
| 377 | .update_status = dsicm_bl_update_status, |
| 378 | }; |
| 379 | |
| 380 | static void dsicm_get_resolution(struct omap_dss_device *dssdev, |
| 381 | u16 *xres, u16 *yres) |
| 382 | { |
| 383 | *xres = dssdev->panel.timings.x_res; |
| 384 | *yres = dssdev->panel.timings.y_res; |
| 385 | } |
| 386 | |
| 387 | static ssize_t dsicm_num_errors_show(struct device *dev, |
| 388 | struct device_attribute *attr, char *buf) |
| 389 | { |
| 390 | struct platform_device *pdev = to_platform_device(dev); |
| 391 | struct panel_drv_data *ddata = platform_get_drvdata(pdev); |
| 392 | struct omap_dss_device *in = ddata->in; |
| 393 | u8 errors = 0; |
| 394 | int r; |
| 395 | |
| 396 | mutex_lock(&ddata->lock); |
| 397 | |
| 398 | if (ddata->enabled) { |
| 399 | in->ops.dsi->bus_lock(in); |
| 400 | |
| 401 | r = dsicm_wake_up(ddata); |
| 402 | if (!r) |
| 403 | r = dsicm_dcs_read_1(ddata, DCS_READ_NUM_ERRORS, |
| 404 | &errors); |
| 405 | |
| 406 | in->ops.dsi->bus_unlock(in); |
| 407 | } else { |
| 408 | r = -ENODEV; |
| 409 | } |
| 410 | |
| 411 | mutex_unlock(&ddata->lock); |
| 412 | |
| 413 | if (r) |
| 414 | return r; |
| 415 | |
| 416 | return snprintf(buf, PAGE_SIZE, "%d\n", errors); |
| 417 | } |
| 418 | |
| 419 | static ssize_t dsicm_hw_revision_show(struct device *dev, |
| 420 | struct device_attribute *attr, char *buf) |
| 421 | { |
| 422 | struct platform_device *pdev = to_platform_device(dev); |
| 423 | struct panel_drv_data *ddata = platform_get_drvdata(pdev); |
| 424 | struct omap_dss_device *in = ddata->in; |
| 425 | u8 id1, id2, id3; |
| 426 | int r; |
| 427 | |
| 428 | mutex_lock(&ddata->lock); |
| 429 | |
| 430 | if (ddata->enabled) { |
| 431 | in->ops.dsi->bus_lock(in); |
| 432 | |
| 433 | r = dsicm_wake_up(ddata); |
| 434 | if (!r) |
| 435 | r = dsicm_get_id(ddata, &id1, &id2, &id3); |
| 436 | |
| 437 | in->ops.dsi->bus_unlock(in); |
| 438 | } else { |
| 439 | r = -ENODEV; |
| 440 | } |
| 441 | |
| 442 | mutex_unlock(&ddata->lock); |
| 443 | |
| 444 | if (r) |
| 445 | return r; |
| 446 | |
| 447 | return snprintf(buf, PAGE_SIZE, "%02x.%02x.%02x\n", id1, id2, id3); |
| 448 | } |
| 449 | |
| 450 | static ssize_t dsicm_store_ulps(struct device *dev, |
| 451 | struct device_attribute *attr, |
| 452 | const char *buf, size_t count) |
| 453 | { |
| 454 | struct platform_device *pdev = to_platform_device(dev); |
| 455 | struct panel_drv_data *ddata = platform_get_drvdata(pdev); |
| 456 | struct omap_dss_device *in = ddata->in; |
| 457 | unsigned long t; |
| 458 | int r; |
| 459 | |
| 460 | r = kstrtoul(buf, 0, &t); |
| 461 | if (r) |
| 462 | return r; |
| 463 | |
| 464 | mutex_lock(&ddata->lock); |
| 465 | |
| 466 | if (ddata->enabled) { |
| 467 | in->ops.dsi->bus_lock(in); |
| 468 | |
| 469 | if (t) |
| 470 | r = dsicm_enter_ulps(ddata); |
| 471 | else |
| 472 | r = dsicm_wake_up(ddata); |
| 473 | |
| 474 | in->ops.dsi->bus_unlock(in); |
| 475 | } |
| 476 | |
| 477 | mutex_unlock(&ddata->lock); |
| 478 | |
| 479 | if (r) |
| 480 | return r; |
| 481 | |
| 482 | return count; |
| 483 | } |
| 484 | |
| 485 | static ssize_t dsicm_show_ulps(struct device *dev, |
| 486 | struct device_attribute *attr, |
| 487 | char *buf) |
| 488 | { |
| 489 | struct platform_device *pdev = to_platform_device(dev); |
| 490 | struct panel_drv_data *ddata = platform_get_drvdata(pdev); |
| 491 | unsigned t; |
| 492 | |
| 493 | mutex_lock(&ddata->lock); |
| 494 | t = ddata->ulps_enabled; |
| 495 | mutex_unlock(&ddata->lock); |
| 496 | |
| 497 | return snprintf(buf, PAGE_SIZE, "%u\n", t); |
| 498 | } |
| 499 | |
| 500 | static ssize_t dsicm_store_ulps_timeout(struct device *dev, |
| 501 | struct device_attribute *attr, |
| 502 | const char *buf, size_t count) |
| 503 | { |
| 504 | struct platform_device *pdev = to_platform_device(dev); |
| 505 | struct panel_drv_data *ddata = platform_get_drvdata(pdev); |
| 506 | struct omap_dss_device *in = ddata->in; |
| 507 | unsigned long t; |
| 508 | int r; |
| 509 | |
| 510 | r = kstrtoul(buf, 0, &t); |
| 511 | if (r) |
| 512 | return r; |
| 513 | |
| 514 | mutex_lock(&ddata->lock); |
| 515 | ddata->ulps_timeout = t; |
| 516 | |
| 517 | if (ddata->enabled) { |
| 518 | /* dsicm_wake_up will restart the timer */ |
| 519 | in->ops.dsi->bus_lock(in); |
| 520 | r = dsicm_wake_up(ddata); |
| 521 | in->ops.dsi->bus_unlock(in); |
| 522 | } |
| 523 | |
| 524 | mutex_unlock(&ddata->lock); |
| 525 | |
| 526 | if (r) |
| 527 | return r; |
| 528 | |
| 529 | return count; |
| 530 | } |
| 531 | |
| 532 | static ssize_t dsicm_show_ulps_timeout(struct device *dev, |
| 533 | struct device_attribute *attr, |
| 534 | char *buf) |
| 535 | { |
| 536 | struct platform_device *pdev = to_platform_device(dev); |
| 537 | struct panel_drv_data *ddata = platform_get_drvdata(pdev); |
| 538 | unsigned t; |
| 539 | |
| 540 | mutex_lock(&ddata->lock); |
| 541 | t = ddata->ulps_timeout; |
| 542 | mutex_unlock(&ddata->lock); |
| 543 | |
| 544 | return snprintf(buf, PAGE_SIZE, "%u\n", t); |
| 545 | } |
| 546 | |
| 547 | static DEVICE_ATTR(num_dsi_errors, S_IRUGO, dsicm_num_errors_show, NULL); |
| 548 | static DEVICE_ATTR(hw_revision, S_IRUGO, dsicm_hw_revision_show, NULL); |
| 549 | static DEVICE_ATTR(ulps, S_IRUGO | S_IWUSR, |
| 550 | dsicm_show_ulps, dsicm_store_ulps); |
| 551 | static DEVICE_ATTR(ulps_timeout, S_IRUGO | S_IWUSR, |
| 552 | dsicm_show_ulps_timeout, dsicm_store_ulps_timeout); |
| 553 | |
| 554 | static struct attribute *dsicm_attrs[] = { |
| 555 | &dev_attr_num_dsi_errors.attr, |
| 556 | &dev_attr_hw_revision.attr, |
| 557 | &dev_attr_ulps.attr, |
| 558 | &dev_attr_ulps_timeout.attr, |
| 559 | NULL, |
| 560 | }; |
| 561 | |
| 562 | static struct attribute_group dsicm_attr_group = { |
| 563 | .attrs = dsicm_attrs, |
| 564 | }; |
| 565 | |
| 566 | static void dsicm_hw_reset(struct panel_drv_data *ddata) |
| 567 | { |
| 568 | if (!gpio_is_valid(ddata->reset_gpio)) |
| 569 | return; |
| 570 | |
| 571 | gpio_set_value(ddata->reset_gpio, 1); |
| 572 | udelay(10); |
| 573 | /* reset the panel */ |
| 574 | gpio_set_value(ddata->reset_gpio, 0); |
| 575 | /* assert reset */ |
| 576 | udelay(10); |
| 577 | gpio_set_value(ddata->reset_gpio, 1); |
| 578 | /* wait after releasing reset */ |
| 579 | usleep_range(5000, 10000); |
| 580 | } |
| 581 | |
| 582 | static int dsicm_power_on(struct panel_drv_data *ddata) |
| 583 | { |
| 584 | struct omap_dss_device *in = ddata->in; |
| 585 | u8 id1, id2, id3; |
| 586 | int r; |
| 587 | struct omap_dss_dsi_config dsi_config = { |
| 588 | .mode = OMAP_DSS_DSI_CMD_MODE, |
| 589 | .pixel_format = OMAP_DSS_DSI_FMT_RGB888, |
| 590 | .timings = &ddata->timings, |
| 591 | .hs_clk_min = 150000000, |
| 592 | .hs_clk_max = 300000000, |
| 593 | .lp_clk_min = 7000000, |
| 594 | .lp_clk_max = 10000000, |
| 595 | }; |
| 596 | |
| 597 | if (ddata->pin_config.num_pins > 0) { |
| 598 | r = in->ops.dsi->configure_pins(in, &ddata->pin_config); |
| 599 | if (r) { |
| 600 | dev_err(&ddata->pdev->dev, |
| 601 | "failed to configure DSI pins\n"); |
| 602 | goto err0; |
| 603 | } |
| 604 | } |
| 605 | |
| 606 | r = in->ops.dsi->set_config(in, &dsi_config); |
| 607 | if (r) { |
| 608 | dev_err(&ddata->pdev->dev, "failed to configure DSI\n"); |
| 609 | goto err0; |
| 610 | } |
| 611 | |
| 612 | r = in->ops.dsi->enable(in); |
| 613 | if (r) { |
| 614 | dev_err(&ddata->pdev->dev, "failed to enable DSI\n"); |
| 615 | goto err0; |
| 616 | } |
| 617 | |
| 618 | dsicm_hw_reset(ddata); |
| 619 | |
| 620 | in->ops.dsi->enable_hs(in, ddata->channel, false); |
| 621 | |
| 622 | r = dsicm_sleep_out(ddata); |
| 623 | if (r) |
| 624 | goto err; |
| 625 | |
| 626 | r = dsicm_get_id(ddata, &id1, &id2, &id3); |
| 627 | if (r) |
| 628 | goto err; |
| 629 | |
| 630 | r = dsicm_dcs_write_1(ddata, DCS_BRIGHTNESS, 0xff); |
| 631 | if (r) |
| 632 | goto err; |
| 633 | |
| 634 | r = dsicm_dcs_write_1(ddata, DCS_CTRL_DISPLAY, |
| 635 | (1<<2) | (1<<5)); /* BL | BCTRL */ |
| 636 | if (r) |
| 637 | goto err; |
| 638 | |
| 639 | r = dsicm_dcs_write_1(ddata, MIPI_DCS_SET_PIXEL_FORMAT, |
| 640 | MIPI_DCS_PIXEL_FMT_24BIT); |
| 641 | if (r) |
| 642 | goto err; |
| 643 | |
| 644 | r = dsicm_dcs_write_0(ddata, MIPI_DCS_SET_DISPLAY_ON); |
| 645 | if (r) |
| 646 | goto err; |
| 647 | |
| 648 | r = _dsicm_enable_te(ddata, ddata->te_enabled); |
| 649 | if (r) |
| 650 | goto err; |
| 651 | |
| 652 | r = in->ops.dsi->enable_video_output(in, ddata->channel); |
| 653 | if (r) |
| 654 | goto err; |
| 655 | |
| 656 | ddata->enabled = 1; |
| 657 | |
| 658 | if (!ddata->intro_printed) { |
| 659 | dev_info(&ddata->pdev->dev, "panel revision %02x.%02x.%02x\n", |
| 660 | id1, id2, id3); |
| 661 | ddata->intro_printed = true; |
| 662 | } |
| 663 | |
| 664 | in->ops.dsi->enable_hs(in, ddata->channel, true); |
| 665 | |
| 666 | return 0; |
| 667 | err: |
| 668 | dev_err(&ddata->pdev->dev, "error while enabling panel, issuing HW reset\n"); |
| 669 | |
| 670 | dsicm_hw_reset(ddata); |
| 671 | |
| 672 | in->ops.dsi->disable(in, true, false); |
| 673 | err0: |
| 674 | return r; |
| 675 | } |
| 676 | |
| 677 | static void dsicm_power_off(struct panel_drv_data *ddata) |
| 678 | { |
| 679 | struct omap_dss_device *in = ddata->in; |
| 680 | int r; |
| 681 | |
| 682 | in->ops.dsi->disable_video_output(in, ddata->channel); |
| 683 | |
| 684 | r = dsicm_dcs_write_0(ddata, MIPI_DCS_SET_DISPLAY_OFF); |
| 685 | if (!r) |
| 686 | r = dsicm_sleep_in(ddata); |
| 687 | |
| 688 | if (r) { |
| 689 | dev_err(&ddata->pdev->dev, |
| 690 | "error disabling panel, issuing HW reset\n"); |
| 691 | dsicm_hw_reset(ddata); |
| 692 | } |
| 693 | |
| 694 | in->ops.dsi->disable(in, true, false); |
| 695 | |
| 696 | ddata->enabled = 0; |
| 697 | } |
| 698 | |
| 699 | static int dsicm_panel_reset(struct panel_drv_data *ddata) |
| 700 | { |
| 701 | dev_err(&ddata->pdev->dev, "performing LCD reset\n"); |
| 702 | |
| 703 | dsicm_power_off(ddata); |
| 704 | dsicm_hw_reset(ddata); |
| 705 | return dsicm_power_on(ddata); |
| 706 | } |
| 707 | |
| 708 | static int dsicm_connect(struct omap_dss_device *dssdev) |
| 709 | { |
| 710 | struct panel_drv_data *ddata = to_panel_data(dssdev); |
| 711 | struct omap_dss_device *in = ddata->in; |
| 712 | struct device *dev = &ddata->pdev->dev; |
| 713 | int r; |
| 714 | |
| 715 | if (omapdss_device_is_connected(dssdev)) |
| 716 | return 0; |
| 717 | |
| 718 | r = in->ops.dsi->connect(in, dssdev); |
| 719 | if (r) { |
| 720 | dev_err(dev, "Failed to connect to video source\n"); |
| 721 | return r; |
| 722 | } |
| 723 | |
| 724 | r = in->ops.dsi->request_vc(ddata->in, &ddata->channel); |
| 725 | if (r) { |
| 726 | dev_err(dev, "failed to get virtual channel\n"); |
| 727 | goto err_req_vc; |
| 728 | } |
| 729 | |
| 730 | r = in->ops.dsi->set_vc_id(ddata->in, ddata->channel, TCH); |
| 731 | if (r) { |
| 732 | dev_err(dev, "failed to set VC_ID\n"); |
| 733 | goto err_vc_id; |
| 734 | } |
| 735 | |
| 736 | return 0; |
| 737 | |
| 738 | err_vc_id: |
| 739 | in->ops.dsi->release_vc(ddata->in, ddata->channel); |
| 740 | err_req_vc: |
| 741 | in->ops.dsi->disconnect(in, dssdev); |
| 742 | return r; |
| 743 | } |
| 744 | |
| 745 | static void dsicm_disconnect(struct omap_dss_device *dssdev) |
| 746 | { |
| 747 | struct panel_drv_data *ddata = to_panel_data(dssdev); |
| 748 | struct omap_dss_device *in = ddata->in; |
| 749 | |
| 750 | if (!omapdss_device_is_connected(dssdev)) |
| 751 | return; |
| 752 | |
| 753 | in->ops.dsi->release_vc(in, ddata->channel); |
| 754 | in->ops.dsi->disconnect(in, dssdev); |
| 755 | } |
| 756 | |
| 757 | static int dsicm_enable(struct omap_dss_device *dssdev) |
| 758 | { |
| 759 | struct panel_drv_data *ddata = to_panel_data(dssdev); |
| 760 | struct omap_dss_device *in = ddata->in; |
| 761 | int r; |
| 762 | |
| 763 | dev_dbg(&ddata->pdev->dev, "enable\n"); |
| 764 | |
| 765 | mutex_lock(&ddata->lock); |
| 766 | |
| 767 | if (!omapdss_device_is_connected(dssdev)) { |
| 768 | r = -ENODEV; |
| 769 | goto err; |
| 770 | } |
| 771 | |
| 772 | if (omapdss_device_is_enabled(dssdev)) { |
| 773 | r = 0; |
| 774 | goto err; |
| 775 | } |
| 776 | |
| 777 | in->ops.dsi->bus_lock(in); |
| 778 | |
| 779 | r = dsicm_power_on(ddata); |
| 780 | |
| 781 | in->ops.dsi->bus_unlock(in); |
| 782 | |
| 783 | if (r) |
| 784 | goto err; |
| 785 | |
| 786 | dssdev->state = OMAP_DSS_DISPLAY_ACTIVE; |
| 787 | |
| 788 | mutex_unlock(&ddata->lock); |
| 789 | |
| 790 | return 0; |
| 791 | err: |
| 792 | dev_dbg(&ddata->pdev->dev, "enable failed\n"); |
| 793 | mutex_unlock(&ddata->lock); |
| 794 | return r; |
| 795 | } |
| 796 | |
| 797 | static void dsicm_disable(struct omap_dss_device *dssdev) |
| 798 | { |
| 799 | struct panel_drv_data *ddata = to_panel_data(dssdev); |
| 800 | struct omap_dss_device *in = ddata->in; |
| 801 | int r; |
| 802 | |
| 803 | dev_dbg(&ddata->pdev->dev, "disable\n"); |
| 804 | |
| 805 | mutex_lock(&ddata->lock); |
| 806 | |
| 807 | dsicm_cancel_ulps_work(ddata); |
| 808 | |
| 809 | in->ops.dsi->bus_lock(in); |
| 810 | |
| 811 | if (omapdss_device_is_enabled(dssdev)) { |
| 812 | r = dsicm_wake_up(ddata); |
| 813 | if (!r) |
| 814 | dsicm_power_off(ddata); |
| 815 | } |
| 816 | |
| 817 | in->ops.dsi->bus_unlock(in); |
| 818 | |
| 819 | dssdev->state = OMAP_DSS_DISPLAY_DISABLED; |
| 820 | |
| 821 | mutex_unlock(&ddata->lock); |
| 822 | } |
| 823 | |
| 824 | static void dsicm_framedone_cb(int err, void *data) |
| 825 | { |
| 826 | struct panel_drv_data *ddata = data; |
| 827 | struct omap_dss_device *in = ddata->in; |
| 828 | |
| 829 | dev_dbg(&ddata->pdev->dev, "framedone, err %d\n", err); |
| 830 | in->ops.dsi->bus_unlock(ddata->in); |
| 831 | } |
| 832 | |
| 833 | static irqreturn_t dsicm_te_isr(int irq, void *data) |
| 834 | { |
| 835 | struct panel_drv_data *ddata = data; |
| 836 | struct omap_dss_device *in = ddata->in; |
| 837 | int old; |
| 838 | int r; |
| 839 | |
| 840 | old = atomic_cmpxchg(&ddata->do_update, 1, 0); |
| 841 | |
| 842 | if (old) { |
| 843 | cancel_delayed_work(&ddata->te_timeout_work); |
| 844 | |
| 845 | r = in->ops.dsi->update(in, ddata->channel, dsicm_framedone_cb, |
| 846 | ddata); |
| 847 | if (r) |
| 848 | goto err; |
| 849 | } |
| 850 | |
| 851 | return IRQ_HANDLED; |
| 852 | err: |
| 853 | dev_err(&ddata->pdev->dev, "start update failed\n"); |
| 854 | in->ops.dsi->bus_unlock(in); |
| 855 | return IRQ_HANDLED; |
| 856 | } |
| 857 | |
| 858 | static void dsicm_te_timeout_work_callback(struct work_struct *work) |
| 859 | { |
| 860 | struct panel_drv_data *ddata = container_of(work, struct panel_drv_data, |
| 861 | te_timeout_work.work); |
| 862 | struct omap_dss_device *in = ddata->in; |
| 863 | |
| 864 | dev_err(&ddata->pdev->dev, "TE not received for 250ms!\n"); |
| 865 | |
| 866 | atomic_set(&ddata->do_update, 0); |
| 867 | in->ops.dsi->bus_unlock(in); |
| 868 | } |
| 869 | |
| 870 | static int dsicm_update(struct omap_dss_device *dssdev, |
| 871 | u16 x, u16 y, u16 w, u16 h) |
| 872 | { |
| 873 | struct panel_drv_data *ddata = to_panel_data(dssdev); |
| 874 | struct omap_dss_device *in = ddata->in; |
| 875 | int r; |
| 876 | |
| 877 | dev_dbg(&ddata->pdev->dev, "update %d, %d, %d x %d\n", x, y, w, h); |
| 878 | |
| 879 | mutex_lock(&ddata->lock); |
| 880 | in->ops.dsi->bus_lock(in); |
| 881 | |
| 882 | r = dsicm_wake_up(ddata); |
| 883 | if (r) |
| 884 | goto err; |
| 885 | |
| 886 | if (!ddata->enabled) { |
| 887 | r = 0; |
| 888 | goto err; |
| 889 | } |
| 890 | |
| 891 | /* XXX no need to send this every frame, but dsi break if not done */ |
| 892 | r = dsicm_set_update_window(ddata, 0, 0, |
| 893 | dssdev->panel.timings.x_res, |
| 894 | dssdev->panel.timings.y_res); |
| 895 | if (r) |
| 896 | goto err; |
| 897 | |
| 898 | if (ddata->te_enabled && gpio_is_valid(ddata->ext_te_gpio)) { |
| 899 | schedule_delayed_work(&ddata->te_timeout_work, |
| 900 | msecs_to_jiffies(250)); |
| 901 | atomic_set(&ddata->do_update, 1); |
| 902 | } else { |
| 903 | r = in->ops.dsi->update(in, ddata->channel, dsicm_framedone_cb, |
| 904 | ddata); |
| 905 | if (r) |
| 906 | goto err; |
| 907 | } |
| 908 | |
| 909 | /* note: no bus_unlock here. unlock is in framedone_cb */ |
| 910 | mutex_unlock(&ddata->lock); |
| 911 | return 0; |
| 912 | err: |
| 913 | in->ops.dsi->bus_unlock(in); |
| 914 | mutex_unlock(&ddata->lock); |
| 915 | return r; |
| 916 | } |
| 917 | |
| 918 | static int dsicm_sync(struct omap_dss_device *dssdev) |
| 919 | { |
| 920 | struct panel_drv_data *ddata = to_panel_data(dssdev); |
| 921 | struct omap_dss_device *in = ddata->in; |
| 922 | |
| 923 | dev_dbg(&ddata->pdev->dev, "sync\n"); |
| 924 | |
| 925 | mutex_lock(&ddata->lock); |
| 926 | in->ops.dsi->bus_lock(in); |
| 927 | in->ops.dsi->bus_unlock(in); |
| 928 | mutex_unlock(&ddata->lock); |
| 929 | |
| 930 | dev_dbg(&ddata->pdev->dev, "sync done\n"); |
| 931 | |
| 932 | return 0; |
| 933 | } |
| 934 | |
| 935 | static int _dsicm_enable_te(struct panel_drv_data *ddata, bool enable) |
| 936 | { |
| 937 | struct omap_dss_device *in = ddata->in; |
| 938 | int r; |
| 939 | |
| 940 | if (enable) |
| 941 | r = dsicm_dcs_write_1(ddata, MIPI_DCS_SET_TEAR_ON, 0); |
| 942 | else |
| 943 | r = dsicm_dcs_write_0(ddata, MIPI_DCS_SET_TEAR_OFF); |
| 944 | |
| 945 | if (!gpio_is_valid(ddata->ext_te_gpio)) |
| 946 | in->ops.dsi->enable_te(in, enable); |
| 947 | |
| 948 | /* possible panel bug */ |
| 949 | msleep(100); |
| 950 | |
| 951 | return r; |
| 952 | } |
| 953 | |
| 954 | static int dsicm_enable_te(struct omap_dss_device *dssdev, bool enable) |
| 955 | { |
| 956 | struct panel_drv_data *ddata = to_panel_data(dssdev); |
| 957 | struct omap_dss_device *in = ddata->in; |
| 958 | int r; |
| 959 | |
| 960 | mutex_lock(&ddata->lock); |
| 961 | |
| 962 | if (ddata->te_enabled == enable) |
| 963 | goto end; |
| 964 | |
| 965 | in->ops.dsi->bus_lock(in); |
| 966 | |
| 967 | if (ddata->enabled) { |
| 968 | r = dsicm_wake_up(ddata); |
| 969 | if (r) |
| 970 | goto err; |
| 971 | |
| 972 | r = _dsicm_enable_te(ddata, enable); |
| 973 | if (r) |
| 974 | goto err; |
| 975 | } |
| 976 | |
| 977 | ddata->te_enabled = enable; |
| 978 | |
| 979 | in->ops.dsi->bus_unlock(in); |
| 980 | end: |
| 981 | mutex_unlock(&ddata->lock); |
| 982 | |
| 983 | return 0; |
| 984 | err: |
| 985 | in->ops.dsi->bus_unlock(in); |
| 986 | mutex_unlock(&ddata->lock); |
| 987 | |
| 988 | return r; |
| 989 | } |
| 990 | |
| 991 | static int dsicm_get_te(struct omap_dss_device *dssdev) |
| 992 | { |
| 993 | struct panel_drv_data *ddata = to_panel_data(dssdev); |
| 994 | int r; |
| 995 | |
| 996 | mutex_lock(&ddata->lock); |
| 997 | r = ddata->te_enabled; |
| 998 | mutex_unlock(&ddata->lock); |
| 999 | |
| 1000 | return r; |
| 1001 | } |
| 1002 | |
| 1003 | static int dsicm_memory_read(struct omap_dss_device *dssdev, |
| 1004 | void *buf, size_t size, |
| 1005 | u16 x, u16 y, u16 w, u16 h) |
| 1006 | { |
| 1007 | struct panel_drv_data *ddata = to_panel_data(dssdev); |
| 1008 | struct omap_dss_device *in = ddata->in; |
| 1009 | int r; |
| 1010 | int first = 1; |
| 1011 | int plen; |
| 1012 | unsigned buf_used = 0; |
| 1013 | |
| 1014 | if (size < w * h * 3) |
| 1015 | return -ENOMEM; |
| 1016 | |
| 1017 | mutex_lock(&ddata->lock); |
| 1018 | |
| 1019 | if (!ddata->enabled) { |
| 1020 | r = -ENODEV; |
| 1021 | goto err1; |
| 1022 | } |
| 1023 | |
| 1024 | size = min(w * h * 3, |
| 1025 | dssdev->panel.timings.x_res * |
| 1026 | dssdev->panel.timings.y_res * 3); |
| 1027 | |
| 1028 | in->ops.dsi->bus_lock(in); |
| 1029 | |
| 1030 | r = dsicm_wake_up(ddata); |
| 1031 | if (r) |
| 1032 | goto err2; |
| 1033 | |
| 1034 | /* plen 1 or 2 goes into short packet. until checksum error is fixed, |
| 1035 | * use short packets. plen 32 works, but bigger packets seem to cause |
| 1036 | * an error. */ |
| 1037 | if (size % 2) |
| 1038 | plen = 1; |
| 1039 | else |
| 1040 | plen = 2; |
| 1041 | |
| 1042 | dsicm_set_update_window(ddata, x, y, w, h); |
| 1043 | |
| 1044 | r = in->ops.dsi->set_max_rx_packet_size(in, ddata->channel, plen); |
| 1045 | if (r) |
| 1046 | goto err2; |
| 1047 | |
| 1048 | while (buf_used < size) { |
| 1049 | u8 dcs_cmd = first ? 0x2e : 0x3e; |
| 1050 | first = 0; |
| 1051 | |
| 1052 | r = in->ops.dsi->dcs_read(in, ddata->channel, dcs_cmd, |
| 1053 | buf + buf_used, size - buf_used); |
| 1054 | |
| 1055 | if (r < 0) { |
| 1056 | dev_err(dssdev->dev, "read error\n"); |
| 1057 | goto err3; |
| 1058 | } |
| 1059 | |
| 1060 | buf_used += r; |
| 1061 | |
| 1062 | if (r < plen) { |
| 1063 | dev_err(&ddata->pdev->dev, "short read\n"); |
| 1064 | break; |
| 1065 | } |
| 1066 | |
| 1067 | if (signal_pending(current)) { |
| 1068 | dev_err(&ddata->pdev->dev, "signal pending, " |
| 1069 | "aborting memory read\n"); |
| 1070 | r = -ERESTARTSYS; |
| 1071 | goto err3; |
| 1072 | } |
| 1073 | } |
| 1074 | |
| 1075 | r = buf_used; |
| 1076 | |
| 1077 | err3: |
| 1078 | in->ops.dsi->set_max_rx_packet_size(in, ddata->channel, 1); |
| 1079 | err2: |
| 1080 | in->ops.dsi->bus_unlock(in); |
| 1081 | err1: |
| 1082 | mutex_unlock(&ddata->lock); |
| 1083 | return r; |
| 1084 | } |
| 1085 | |
| 1086 | static void dsicm_ulps_work(struct work_struct *work) |
| 1087 | { |
| 1088 | struct panel_drv_data *ddata = container_of(work, struct panel_drv_data, |
| 1089 | ulps_work.work); |
| 1090 | struct omap_dss_device *dssdev = &ddata->dssdev; |
| 1091 | struct omap_dss_device *in = ddata->in; |
| 1092 | |
| 1093 | mutex_lock(&ddata->lock); |
| 1094 | |
| 1095 | if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE || !ddata->enabled) { |
| 1096 | mutex_unlock(&ddata->lock); |
| 1097 | return; |
| 1098 | } |
| 1099 | |
| 1100 | in->ops.dsi->bus_lock(in); |
| 1101 | |
| 1102 | dsicm_enter_ulps(ddata); |
| 1103 | |
| 1104 | in->ops.dsi->bus_unlock(in); |
| 1105 | mutex_unlock(&ddata->lock); |
| 1106 | } |
| 1107 | |
| 1108 | static struct omap_dss_driver dsicm_ops = { |
| 1109 | .connect = dsicm_connect, |
| 1110 | .disconnect = dsicm_disconnect, |
| 1111 | |
| 1112 | .enable = dsicm_enable, |
| 1113 | .disable = dsicm_disable, |
| 1114 | |
| 1115 | .update = dsicm_update, |
| 1116 | .sync = dsicm_sync, |
| 1117 | |
| 1118 | .get_resolution = dsicm_get_resolution, |
| 1119 | .get_recommended_bpp = omapdss_default_get_recommended_bpp, |
| 1120 | |
| 1121 | .enable_te = dsicm_enable_te, |
| 1122 | .get_te = dsicm_get_te, |
| 1123 | |
| 1124 | .memory_read = dsicm_memory_read, |
| 1125 | }; |
| 1126 | |
Tomi Valkeinen | f76ee89 | 2015-12-09 18:28:28 +0200 | [diff] [blame] | 1127 | static int dsicm_probe_of(struct platform_device *pdev) |
| 1128 | { |
| 1129 | struct device_node *node = pdev->dev.of_node; |
| 1130 | struct panel_drv_data *ddata = platform_get_drvdata(pdev); |
| 1131 | struct omap_dss_device *in; |
| 1132 | int gpio; |
| 1133 | |
| 1134 | gpio = of_get_named_gpio(node, "reset-gpios", 0); |
| 1135 | if (!gpio_is_valid(gpio)) { |
| 1136 | dev_err(&pdev->dev, "failed to parse reset gpio\n"); |
| 1137 | return gpio; |
| 1138 | } |
| 1139 | ddata->reset_gpio = gpio; |
| 1140 | |
| 1141 | gpio = of_get_named_gpio(node, "te-gpios", 0); |
| 1142 | if (gpio_is_valid(gpio) || gpio == -ENOENT) { |
| 1143 | ddata->ext_te_gpio = gpio; |
| 1144 | } else { |
| 1145 | dev_err(&pdev->dev, "failed to parse TE gpio\n"); |
| 1146 | return gpio; |
| 1147 | } |
| 1148 | |
| 1149 | in = omapdss_of_find_source_for_first_ep(node); |
| 1150 | if (IS_ERR(in)) { |
| 1151 | dev_err(&pdev->dev, "failed to find video source\n"); |
| 1152 | return PTR_ERR(in); |
| 1153 | } |
| 1154 | |
| 1155 | ddata->in = in; |
| 1156 | |
| 1157 | /* TODO: ulps, backlight */ |
| 1158 | |
| 1159 | return 0; |
| 1160 | } |
| 1161 | |
| 1162 | static int dsicm_probe(struct platform_device *pdev) |
| 1163 | { |
| 1164 | struct backlight_properties props; |
| 1165 | struct panel_drv_data *ddata; |
| 1166 | struct backlight_device *bldev = NULL; |
| 1167 | struct device *dev = &pdev->dev; |
| 1168 | struct omap_dss_device *dssdev; |
| 1169 | int r; |
| 1170 | |
| 1171 | dev_dbg(dev, "probe\n"); |
| 1172 | |
Peter Ujfalusi | 0984097c | 2016-05-26 16:32:06 +0300 | [diff] [blame] | 1173 | if (!pdev->dev.of_node) |
| 1174 | return -ENODEV; |
| 1175 | |
Tomi Valkeinen | f76ee89 | 2015-12-09 18:28:28 +0200 | [diff] [blame] | 1176 | ddata = devm_kzalloc(dev, sizeof(*ddata), GFP_KERNEL); |
| 1177 | if (!ddata) |
| 1178 | return -ENOMEM; |
| 1179 | |
| 1180 | platform_set_drvdata(pdev, ddata); |
| 1181 | ddata->pdev = pdev; |
| 1182 | |
Peter Ujfalusi | 0984097c | 2016-05-26 16:32:06 +0300 | [diff] [blame] | 1183 | r = dsicm_probe_of(pdev); |
| 1184 | if (r) |
| 1185 | return r; |
Tomi Valkeinen | f76ee89 | 2015-12-09 18:28:28 +0200 | [diff] [blame] | 1186 | |
| 1187 | ddata->timings.x_res = 864; |
| 1188 | ddata->timings.y_res = 480; |
| 1189 | ddata->timings.pixelclock = 864 * 480 * 60; |
| 1190 | |
| 1191 | dssdev = &ddata->dssdev; |
| 1192 | dssdev->dev = dev; |
| 1193 | dssdev->driver = &dsicm_ops; |
| 1194 | dssdev->panel.timings = ddata->timings; |
| 1195 | dssdev->type = OMAP_DISPLAY_TYPE_DSI; |
| 1196 | dssdev->owner = THIS_MODULE; |
| 1197 | |
| 1198 | dssdev->panel.dsi_pix_fmt = OMAP_DSS_DSI_FMT_RGB888; |
| 1199 | dssdev->caps = OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE | |
| 1200 | OMAP_DSS_DISPLAY_CAP_TEAR_ELIM; |
| 1201 | |
| 1202 | r = omapdss_register_display(dssdev); |
| 1203 | if (r) { |
| 1204 | dev_err(dev, "Failed to register panel\n"); |
| 1205 | goto err_reg; |
| 1206 | } |
| 1207 | |
| 1208 | mutex_init(&ddata->lock); |
| 1209 | |
| 1210 | atomic_set(&ddata->do_update, 0); |
| 1211 | |
| 1212 | if (gpio_is_valid(ddata->reset_gpio)) { |
| 1213 | r = devm_gpio_request_one(dev, ddata->reset_gpio, |
| 1214 | GPIOF_OUT_INIT_LOW, "taal rst"); |
| 1215 | if (r) { |
| 1216 | dev_err(dev, "failed to request reset gpio\n"); |
| 1217 | return r; |
| 1218 | } |
| 1219 | } |
| 1220 | |
| 1221 | if (gpio_is_valid(ddata->ext_te_gpio)) { |
| 1222 | r = devm_gpio_request_one(dev, ddata->ext_te_gpio, |
| 1223 | GPIOF_IN, "taal irq"); |
| 1224 | if (r) { |
| 1225 | dev_err(dev, "GPIO request failed\n"); |
| 1226 | return r; |
| 1227 | } |
| 1228 | |
| 1229 | r = devm_request_irq(dev, gpio_to_irq(ddata->ext_te_gpio), |
| 1230 | dsicm_te_isr, |
| 1231 | IRQF_TRIGGER_RISING, |
| 1232 | "taal vsync", ddata); |
| 1233 | |
| 1234 | if (r) { |
| 1235 | dev_err(dev, "IRQ request failed\n"); |
| 1236 | return r; |
| 1237 | } |
| 1238 | |
| 1239 | INIT_DEFERRABLE_WORK(&ddata->te_timeout_work, |
| 1240 | dsicm_te_timeout_work_callback); |
| 1241 | |
| 1242 | dev_dbg(dev, "Using GPIO TE\n"); |
| 1243 | } |
| 1244 | |
Tomi Valkeinen | f76ee89 | 2015-12-09 18:28:28 +0200 | [diff] [blame] | 1245 | INIT_DELAYED_WORK(&ddata->ulps_work, dsicm_ulps_work); |
| 1246 | |
| 1247 | dsicm_hw_reset(ddata); |
| 1248 | |
| 1249 | if (ddata->use_dsi_backlight) { |
| 1250 | memset(&props, 0, sizeof(struct backlight_properties)); |
| 1251 | props.max_brightness = 255; |
| 1252 | |
| 1253 | props.type = BACKLIGHT_RAW; |
| 1254 | bldev = backlight_device_register(dev_name(dev), |
| 1255 | dev, ddata, &dsicm_bl_ops, &props); |
| 1256 | if (IS_ERR(bldev)) { |
| 1257 | r = PTR_ERR(bldev); |
Bhaktipriya Shridhar | b59ac9a | 2016-07-02 13:55:40 +0530 | [diff] [blame] | 1258 | goto err_reg; |
Tomi Valkeinen | f76ee89 | 2015-12-09 18:28:28 +0200 | [diff] [blame] | 1259 | } |
| 1260 | |
| 1261 | ddata->bldev = bldev; |
| 1262 | |
| 1263 | bldev->props.fb_blank = FB_BLANK_UNBLANK; |
| 1264 | bldev->props.power = FB_BLANK_UNBLANK; |
| 1265 | bldev->props.brightness = 255; |
| 1266 | |
| 1267 | dsicm_bl_update_status(bldev); |
| 1268 | } |
| 1269 | |
| 1270 | r = sysfs_create_group(&dev->kobj, &dsicm_attr_group); |
| 1271 | if (r) { |
| 1272 | dev_err(dev, "failed to create sysfs files\n"); |
| 1273 | goto err_sysfs_create; |
| 1274 | } |
| 1275 | |
| 1276 | return 0; |
| 1277 | |
| 1278 | err_sysfs_create: |
| 1279 | if (bldev != NULL) |
| 1280 | backlight_device_unregister(bldev); |
Tomi Valkeinen | f76ee89 | 2015-12-09 18:28:28 +0200 | [diff] [blame] | 1281 | err_reg: |
| 1282 | return r; |
| 1283 | } |
| 1284 | |
| 1285 | static int __exit dsicm_remove(struct platform_device *pdev) |
| 1286 | { |
| 1287 | struct panel_drv_data *ddata = platform_get_drvdata(pdev); |
| 1288 | struct omap_dss_device *dssdev = &ddata->dssdev; |
| 1289 | struct backlight_device *bldev; |
| 1290 | |
| 1291 | dev_dbg(&pdev->dev, "remove\n"); |
| 1292 | |
| 1293 | omapdss_unregister_display(dssdev); |
| 1294 | |
| 1295 | dsicm_disable(dssdev); |
| 1296 | dsicm_disconnect(dssdev); |
| 1297 | |
| 1298 | sysfs_remove_group(&pdev->dev.kobj, &dsicm_attr_group); |
| 1299 | |
| 1300 | bldev = ddata->bldev; |
| 1301 | if (bldev != NULL) { |
| 1302 | bldev->props.power = FB_BLANK_POWERDOWN; |
| 1303 | dsicm_bl_update_status(bldev); |
| 1304 | backlight_device_unregister(bldev); |
| 1305 | } |
| 1306 | |
| 1307 | omap_dss_put_device(ddata->in); |
| 1308 | |
| 1309 | dsicm_cancel_ulps_work(ddata); |
Tomi Valkeinen | f76ee89 | 2015-12-09 18:28:28 +0200 | [diff] [blame] | 1310 | |
| 1311 | /* reset, to be sure that the panel is in a valid state */ |
| 1312 | dsicm_hw_reset(ddata); |
| 1313 | |
| 1314 | return 0; |
| 1315 | } |
| 1316 | |
| 1317 | static const struct of_device_id dsicm_of_match[] = { |
| 1318 | { .compatible = "omapdss,panel-dsi-cm", }, |
| 1319 | {}, |
| 1320 | }; |
| 1321 | |
| 1322 | MODULE_DEVICE_TABLE(of, dsicm_of_match); |
| 1323 | |
| 1324 | static struct platform_driver dsicm_driver = { |
| 1325 | .probe = dsicm_probe, |
| 1326 | .remove = __exit_p(dsicm_remove), |
| 1327 | .driver = { |
| 1328 | .name = "panel-dsi-cm", |
| 1329 | .of_match_table = dsicm_of_match, |
| 1330 | .suppress_bind_attrs = true, |
| 1331 | }, |
| 1332 | }; |
| 1333 | |
| 1334 | module_platform_driver(dsicm_driver); |
| 1335 | |
| 1336 | MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>"); |
| 1337 | MODULE_DESCRIPTION("Generic DSI Command Mode Panel Driver"); |
| 1338 | MODULE_LICENSE("GPL"); |