1 /* exynos_drm_vidi.c 2 * 3 * Copyright (C) 2012 Samsung Electronics Co.Ltd 4 * Authors: 5 * Inki Dae <inki.dae@samsung.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 as published by the 9 * Free Software Foundation; either version 2 of the License, or (at your 10 * option) any later version. 11 * 12 */ 13 #include "drmP.h" 14 15 #include <linux/kernel.h> 16 #include <linux/module.h> 17 #include <linux/platform_device.h> 18 19 #include <drm/exynos_drm.h> 20 21 #include "drm_edid.h" 22 #include "drm_crtc_helper.h" 23 24 #include "exynos_drm_drv.h" 25 #include "exynos_drm_crtc.h" 26 #include "exynos_drm_encoder.h" 27 28 /* vidi has totally three virtual windows. */ 29 #define WINDOWS_NR 3 30 31 #define get_vidi_context(dev) platform_get_drvdata(to_platform_device(dev)) 32 33 struct vidi_win_data { 34 unsigned int offset_x; 35 unsigned int offset_y; 36 unsigned int ovl_width; 37 unsigned int ovl_height; 38 unsigned int fb_width; 39 unsigned int fb_height; 40 unsigned int bpp; 41 dma_addr_t dma_addr; 42 void __iomem *vaddr; 43 unsigned int buf_offsize; 44 unsigned int line_size; /* bytes */ 45 bool enabled; 46 }; 47 48 struct vidi_context { 49 struct exynos_drm_subdrv subdrv; 50 struct drm_crtc *crtc; 51 struct vidi_win_data win_data[WINDOWS_NR]; 52 struct edid *raw_edid; 53 unsigned int clkdiv; 54 unsigned int default_win; 55 unsigned long irq_flags; 56 unsigned int connected; 57 bool vblank_on; 58 bool suspended; 59 struct work_struct work; 60 struct mutex lock; 61 }; 62 63 static const char fake_edid_info[] = { 64 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x4c, 0x2d, 0x05, 0x05, 65 0x00, 0x00, 0x00, 0x00, 0x30, 0x12, 0x01, 0x03, 0x80, 0x10, 0x09, 0x78, 66 0x0a, 0xee, 0x91, 0xa3, 0x54, 0x4c, 0x99, 0x26, 0x0f, 0x50, 0x54, 0xbd, 67 0xee, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 68 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x66, 0x21, 0x50, 0xb0, 0x51, 0x00, 69 0x1b, 0x30, 0x40, 0x70, 0x36, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 70 0x01, 0x1d, 0x00, 0x72, 0x51, 0xd0, 0x1e, 0x20, 0x6e, 0x28, 0x55, 0x00, 71 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x18, 72 0x4b, 0x1a, 0x44, 0x17, 0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 73 0x00, 0x00, 0x00, 0xfc, 0x00, 0x53, 0x41, 0x4d, 0x53, 0x55, 0x4e, 0x47, 74 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x01, 0xbc, 0x02, 0x03, 0x1e, 0xf1, 75 0x46, 0x84, 0x05, 0x03, 0x10, 0x20, 0x22, 0x23, 0x09, 0x07, 0x07, 0x83, 76 0x01, 0x00, 0x00, 0xe2, 0x00, 0x0f, 0x67, 0x03, 0x0c, 0x00, 0x10, 0x00, 77 0xb8, 0x2d, 0x01, 0x1d, 0x80, 0x18, 0x71, 0x1c, 0x16, 0x20, 0x58, 0x2c, 78 0x25, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x9e, 0x8c, 0x0a, 0xd0, 0x8a, 79 0x20, 0xe0, 0x2d, 0x10, 0x10, 0x3e, 0x96, 0x00, 0xa0, 0x5a, 0x00, 0x00, 80 0x00, 0x18, 0x02, 0x3a, 0x80, 0x18, 0x71, 0x38, 0x2d, 0x40, 0x58, 0x2c, 81 0x45, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0x00, 82 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 83 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 84 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 85 0x00, 0x00, 0x00, 0x06 86 }; 87 88 static void vidi_fake_vblank_handler(struct work_struct *work); 89 90 static bool vidi_display_is_connected(struct device *dev) 91 { 92 struct vidi_context *ctx = get_vidi_context(dev); 93 94 DRM_DEBUG_KMS("%s\n", __FILE__); 95 96 /* 97 * connection request would come from user side 98 * to do hotplug through specific ioctl. 99 */ 100 return ctx->connected ? true : false; 101 } 102 103 static int vidi_get_edid(struct device *dev, struct drm_connector *connector, 104 u8 *edid, int len) 105 { 106 struct vidi_context *ctx = get_vidi_context(dev); 107 struct edid *raw_edid; 108 109 DRM_DEBUG_KMS("%s\n", __FILE__); 110 111 /* 112 * the edid data comes from user side and it would be set 113 * to ctx->raw_edid through specific ioctl. 114 */ 115 if (!ctx->raw_edid) { 116 DRM_DEBUG_KMS("raw_edid is null.\n"); 117 return -EFAULT; 118 } 119 120 raw_edid = kzalloc(len, GFP_KERNEL); 121 if (!raw_edid) { 122 DRM_DEBUG_KMS("failed to allocate raw_edid.\n"); 123 return -ENOMEM; 124 } 125 126 memcpy(raw_edid, ctx->raw_edid, min((1 + ctx->raw_edid->extensions) 127 * EDID_LENGTH, len)); 128 129 /* attach the edid data to connector. */ 130 connector->display_info.raw_edid = (char *)raw_edid; 131 132 memcpy(edid, ctx->raw_edid, min((1 + ctx->raw_edid->extensions) 133 * EDID_LENGTH, len)); 134 135 return 0; 136 } 137 138 static void *vidi_get_panel(struct device *dev) 139 { 140 DRM_DEBUG_KMS("%s\n", __FILE__); 141 142 /* TODO. */ 143 144 return NULL; 145 } 146 147 static int vidi_check_timing(struct device *dev, void *timing) 148 { 149 DRM_DEBUG_KMS("%s\n", __FILE__); 150 151 /* TODO. */ 152 153 return 0; 154 } 155 156 static int vidi_display_power_on(struct device *dev, int mode) 157 { 158 DRM_DEBUG_KMS("%s\n", __FILE__); 159 160 /* TODO */ 161 162 return 0; 163 } 164 165 static struct exynos_drm_display_ops vidi_display_ops = { 166 .type = EXYNOS_DISPLAY_TYPE_VIDI, 167 .is_connected = vidi_display_is_connected, 168 .get_edid = vidi_get_edid, 169 .get_panel = vidi_get_panel, 170 .check_timing = vidi_check_timing, 171 .power_on = vidi_display_power_on, 172 }; 173 174 static void vidi_dpms(struct device *subdrv_dev, int mode) 175 { 176 struct vidi_context *ctx = get_vidi_context(subdrv_dev); 177 178 DRM_DEBUG_KMS("%s, %d\n", __FILE__, mode); 179 180 mutex_lock(&ctx->lock); 181 182 switch (mode) { 183 case DRM_MODE_DPMS_ON: 184 /* TODO. */ 185 break; 186 case DRM_MODE_DPMS_STANDBY: 187 case DRM_MODE_DPMS_SUSPEND: 188 case DRM_MODE_DPMS_OFF: 189 /* TODO. */ 190 break; 191 default: 192 DRM_DEBUG_KMS("unspecified mode %d\n", mode); 193 break; 194 } 195 196 mutex_unlock(&ctx->lock); 197 } 198 199 static void vidi_apply(struct device *subdrv_dev) 200 { 201 struct vidi_context *ctx = get_vidi_context(subdrv_dev); 202 struct exynos_drm_manager *mgr = ctx->subdrv.manager; 203 struct exynos_drm_manager_ops *mgr_ops = mgr->ops; 204 struct exynos_drm_overlay_ops *ovl_ops = mgr->overlay_ops; 205 struct vidi_win_data *win_data; 206 int i; 207 208 DRM_DEBUG_KMS("%s\n", __FILE__); 209 210 for (i = 0; i < WINDOWS_NR; i++) { 211 win_data = &ctx->win_data[i]; 212 if (win_data->enabled && (ovl_ops && ovl_ops->commit)) 213 ovl_ops->commit(subdrv_dev, i); 214 } 215 216 if (mgr_ops && mgr_ops->commit) 217 mgr_ops->commit(subdrv_dev); 218 } 219 220 static void vidi_commit(struct device *dev) 221 { 222 struct vidi_context *ctx = get_vidi_context(dev); 223 224 DRM_DEBUG_KMS("%s\n", __FILE__); 225 226 if (ctx->suspended) 227 return; 228 } 229 230 static int vidi_enable_vblank(struct device *dev) 231 { 232 struct vidi_context *ctx = get_vidi_context(dev); 233 234 DRM_DEBUG_KMS("%s\n", __FILE__); 235 236 if (ctx->suspended) 237 return -EPERM; 238 239 if (!test_and_set_bit(0, &ctx->irq_flags)) 240 ctx->vblank_on = true; 241 242 return 0; 243 } 244 245 static void vidi_disable_vblank(struct device *dev) 246 { 247 struct vidi_context *ctx = get_vidi_context(dev); 248 249 DRM_DEBUG_KMS("%s\n", __FILE__); 250 251 if (ctx->suspended) 252 return; 253 254 if (test_and_clear_bit(0, &ctx->irq_flags)) 255 ctx->vblank_on = false; 256 } 257 258 static struct exynos_drm_manager_ops vidi_manager_ops = { 259 .dpms = vidi_dpms, 260 .apply = vidi_apply, 261 .commit = vidi_commit, 262 .enable_vblank = vidi_enable_vblank, 263 .disable_vblank = vidi_disable_vblank, 264 }; 265 266 static void vidi_win_mode_set(struct device *dev, 267 struct exynos_drm_overlay *overlay) 268 { 269 struct vidi_context *ctx = get_vidi_context(dev); 270 struct vidi_win_data *win_data; 271 int win; 272 unsigned long offset; 273 274 DRM_DEBUG_KMS("%s\n", __FILE__); 275 276 if (!overlay) { 277 dev_err(dev, "overlay is NULL\n"); 278 return; 279 } 280 281 win = overlay->zpos; 282 if (win == DEFAULT_ZPOS) 283 win = ctx->default_win; 284 285 if (win < 0 || win > WINDOWS_NR) 286 return; 287 288 offset = overlay->fb_x * (overlay->bpp >> 3); 289 offset += overlay->fb_y * overlay->pitch; 290 291 DRM_DEBUG_KMS("offset = 0x%lx, pitch = %x\n", offset, overlay->pitch); 292 293 win_data = &ctx->win_data[win]; 294 295 win_data->offset_x = overlay->crtc_x; 296 win_data->offset_y = overlay->crtc_y; 297 win_data->ovl_width = overlay->crtc_width; 298 win_data->ovl_height = overlay->crtc_height; 299 win_data->fb_width = overlay->fb_width; 300 win_data->fb_height = overlay->fb_height; 301 win_data->dma_addr = overlay->dma_addr[0] + offset; 302 win_data->vaddr = overlay->vaddr[0] + offset; 303 win_data->bpp = overlay->bpp; 304 win_data->buf_offsize = (overlay->fb_width - overlay->crtc_width) * 305 (overlay->bpp >> 3); 306 win_data->line_size = overlay->crtc_width * (overlay->bpp >> 3); 307 308 /* 309 * some parts of win_data should be transferred to user side 310 * through specific ioctl. 311 */ 312 313 DRM_DEBUG_KMS("offset_x = %d, offset_y = %d\n", 314 win_data->offset_x, win_data->offset_y); 315 DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n", 316 win_data->ovl_width, win_data->ovl_height); 317 DRM_DEBUG_KMS("paddr = 0x%lx, vaddr = 0x%lx\n", 318 (unsigned long)win_data->dma_addr, 319 (unsigned long)win_data->vaddr); 320 DRM_DEBUG_KMS("fb_width = %d, crtc_width = %d\n", 321 overlay->fb_width, overlay->crtc_width); 322 } 323 324 static void vidi_win_commit(struct device *dev, int zpos) 325 { 326 struct vidi_context *ctx = get_vidi_context(dev); 327 struct vidi_win_data *win_data; 328 int win = zpos; 329 330 DRM_DEBUG_KMS("%s\n", __FILE__); 331 332 if (ctx->suspended) 333 return; 334 335 if (win == DEFAULT_ZPOS) 336 win = ctx->default_win; 337 338 if (win < 0 || win > WINDOWS_NR) 339 return; 340 341 win_data = &ctx->win_data[win]; 342 343 win_data->enabled = true; 344 345 DRM_DEBUG_KMS("dma_addr = 0x%x\n", win_data->dma_addr); 346 347 if (ctx->vblank_on) 348 schedule_work(&ctx->work); 349 } 350 351 static void vidi_win_disable(struct device *dev, int zpos) 352 { 353 struct vidi_context *ctx = get_vidi_context(dev); 354 struct vidi_win_data *win_data; 355 int win = zpos; 356 357 DRM_DEBUG_KMS("%s\n", __FILE__); 358 359 if (win == DEFAULT_ZPOS) 360 win = ctx->default_win; 361 362 if (win < 0 || win > WINDOWS_NR) 363 return; 364 365 win_data = &ctx->win_data[win]; 366 win_data->enabled = false; 367 368 /* TODO. */ 369 } 370 371 static struct exynos_drm_overlay_ops vidi_overlay_ops = { 372 .mode_set = vidi_win_mode_set, 373 .commit = vidi_win_commit, 374 .disable = vidi_win_disable, 375 }; 376 377 static struct exynos_drm_manager vidi_manager = { 378 .pipe = -1, 379 .ops = &vidi_manager_ops, 380 .overlay_ops = &vidi_overlay_ops, 381 .display_ops = &vidi_display_ops, 382 }; 383 384 static void vidi_finish_pageflip(struct drm_device *drm_dev, int crtc) 385 { 386 struct exynos_drm_private *dev_priv = drm_dev->dev_private; 387 struct drm_pending_vblank_event *e, *t; 388 struct timeval now; 389 unsigned long flags; 390 bool is_checked = false; 391 392 spin_lock_irqsave(&drm_dev->event_lock, flags); 393 394 list_for_each_entry_safe(e, t, &dev_priv->pageflip_event_list, 395 base.link) { 396 /* if event's pipe isn't same as crtc then ignore it. */ 397 if (crtc != e->pipe) 398 continue; 399 400 is_checked = true; 401 402 do_gettimeofday(&now); 403 e->event.sequence = 0; 404 e->event.tv_sec = now.tv_sec; 405 e->event.tv_usec = now.tv_usec; 406 407 list_move_tail(&e->base.link, &e->base.file_priv->event_list); 408 wake_up_interruptible(&e->base.file_priv->event_wait); 409 } 410 411 if (is_checked) { 412 /* 413 * call drm_vblank_put only in case that drm_vblank_get was 414 * called. 415 */ 416 if (atomic_read(&drm_dev->vblank_refcount[crtc]) > 0) 417 drm_vblank_put(drm_dev, crtc); 418 419 /* 420 * don't off vblank if vblank_disable_allowed is 1, 421 * because vblank would be off by timer handler. 422 */ 423 if (!drm_dev->vblank_disable_allowed) 424 drm_vblank_off(drm_dev, crtc); 425 } 426 427 spin_unlock_irqrestore(&drm_dev->event_lock, flags); 428 } 429 430 static void vidi_fake_vblank_handler(struct work_struct *work) 431 { 432 struct vidi_context *ctx = container_of(work, struct vidi_context, 433 work); 434 struct exynos_drm_subdrv *subdrv = &ctx->subdrv; 435 struct exynos_drm_manager *manager = subdrv->manager; 436 437 if (manager->pipe < 0) 438 return; 439 440 /* refresh rate is about 50Hz. */ 441 usleep_range(16000, 20000); 442 443 drm_handle_vblank(subdrv->drm_dev, manager->pipe); 444 vidi_finish_pageflip(subdrv->drm_dev, manager->pipe); 445 } 446 447 static int vidi_subdrv_probe(struct drm_device *drm_dev, struct device *dev) 448 { 449 DRM_DEBUG_KMS("%s\n", __FILE__); 450 451 /* 452 * enable drm irq mode. 453 * - with irq_enabled = 1, we can use the vblank feature. 454 * 455 * P.S. note that we wouldn't use drm irq handler but 456 * just specific driver own one instead because 457 * drm framework supports only one irq handler. 458 */ 459 drm_dev->irq_enabled = 1; 460 461 /* 462 * with vblank_disable_allowed = 1, vblank interrupt will be disabled 463 * by drm timer once a current process gives up ownership of 464 * vblank event.(after drm_vblank_put function is called) 465 */ 466 drm_dev->vblank_disable_allowed = 1; 467 468 return 0; 469 } 470 471 static void vidi_subdrv_remove(struct drm_device *drm_dev) 472 { 473 DRM_DEBUG_KMS("%s\n", __FILE__); 474 475 /* TODO. */ 476 } 477 478 static int vidi_power_on(struct vidi_context *ctx, bool enable) 479 { 480 struct exynos_drm_subdrv *subdrv = &ctx->subdrv; 481 struct device *dev = subdrv->dev; 482 483 DRM_DEBUG_KMS("%s\n", __FILE__); 484 485 if (enable != false && enable != true) 486 return -EINVAL; 487 488 if (enable) { 489 ctx->suspended = false; 490 491 /* if vblank was enabled status, enable it again. */ 492 if (test_and_clear_bit(0, &ctx->irq_flags)) 493 vidi_enable_vblank(dev); 494 495 vidi_apply(dev); 496 } else { 497 ctx->suspended = true; 498 } 499 500 return 0; 501 } 502 503 static int vidi_show_connection(struct device *dev, 504 struct device_attribute *attr, char *buf) 505 { 506 int rc; 507 struct vidi_context *ctx = get_vidi_context(dev); 508 509 mutex_lock(&ctx->lock); 510 511 rc = sprintf(buf, "%d\n", ctx->connected); 512 513 mutex_unlock(&ctx->lock); 514 515 return rc; 516 } 517 518 static int vidi_store_connection(struct device *dev, 519 struct device_attribute *attr, 520 const char *buf, size_t len) 521 { 522 struct vidi_context *ctx = get_vidi_context(dev); 523 int ret; 524 525 DRM_DEBUG_KMS("%s\n", __FILE__); 526 527 ret = kstrtoint(buf, 0, &ctx->connected); 528 if (ret) 529 return ret; 530 531 if (ctx->connected > 1) 532 return -EINVAL; 533 534 DRM_DEBUG_KMS("requested connection.\n"); 535 536 drm_helper_hpd_irq_event(ctx->subdrv.drm_dev); 537 538 return len; 539 } 540 541 static DEVICE_ATTR(connection, 0644, vidi_show_connection, 542 vidi_store_connection); 543 544 int vidi_connection_ioctl(struct drm_device *drm_dev, void *data, 545 struct drm_file *file_priv) 546 { 547 struct vidi_context *ctx = NULL; 548 struct drm_encoder *encoder; 549 struct exynos_drm_manager *manager; 550 struct exynos_drm_display_ops *display_ops; 551 struct drm_exynos_vidi_connection *vidi = data; 552 553 DRM_DEBUG_KMS("%s\n", __FILE__); 554 555 if (!vidi) { 556 DRM_DEBUG_KMS("user data for vidi is null.\n"); 557 return -EINVAL; 558 } 559 560 if (!vidi->edid) { 561 DRM_DEBUG_KMS("edid data is null.\n"); 562 return -EINVAL; 563 } 564 565 if (vidi->connection > 1) { 566 DRM_DEBUG_KMS("connection should be 0 or 1.\n"); 567 return -EINVAL; 568 } 569 570 list_for_each_entry(encoder, &drm_dev->mode_config.encoder_list, 571 head) { 572 manager = exynos_drm_get_manager(encoder); 573 display_ops = manager->display_ops; 574 575 if (display_ops->type == EXYNOS_DISPLAY_TYPE_VIDI) { 576 ctx = get_vidi_context(manager->dev); 577 break; 578 } 579 } 580 581 if (!ctx) { 582 DRM_DEBUG_KMS("not found virtual device type encoder.\n"); 583 return -EINVAL; 584 } 585 586 if (ctx->connected == vidi->connection) { 587 DRM_DEBUG_KMS("same connection request.\n"); 588 return -EINVAL; 589 } 590 591 if (vidi->connection) 592 ctx->raw_edid = (struct edid *)vidi->edid; 593 594 ctx->connected = vidi->connection; 595 drm_helper_hpd_irq_event(ctx->subdrv.drm_dev); 596 597 return 0; 598 } 599 600 static int __devinit vidi_probe(struct platform_device *pdev) 601 { 602 struct device *dev = &pdev->dev; 603 struct vidi_context *ctx; 604 struct exynos_drm_subdrv *subdrv; 605 int ret; 606 607 DRM_DEBUG_KMS("%s\n", __FILE__); 608 609 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); 610 if (!ctx) 611 return -ENOMEM; 612 613 ctx->default_win = 0; 614 615 INIT_WORK(&ctx->work, vidi_fake_vblank_handler); 616 617 /* for test */ 618 ctx->raw_edid = (struct edid *)fake_edid_info; 619 620 subdrv = &ctx->subdrv; 621 subdrv->dev = dev; 622 subdrv->manager = &vidi_manager; 623 subdrv->probe = vidi_subdrv_probe; 624 subdrv->remove = vidi_subdrv_remove; 625 626 mutex_init(&ctx->lock); 627 628 platform_set_drvdata(pdev, ctx); 629 630 ret = device_create_file(&pdev->dev, &dev_attr_connection); 631 if (ret < 0) 632 DRM_INFO("failed to create connection sysfs.\n"); 633 634 exynos_drm_subdrv_register(subdrv); 635 636 return 0; 637 } 638 639 static int __devexit vidi_remove(struct platform_device *pdev) 640 { 641 struct vidi_context *ctx = platform_get_drvdata(pdev); 642 643 DRM_DEBUG_KMS("%s\n", __FILE__); 644 645 exynos_drm_subdrv_unregister(&ctx->subdrv); 646 647 kfree(ctx); 648 649 return 0; 650 } 651 652 #ifdef CONFIG_PM_SLEEP 653 static int vidi_suspend(struct device *dev) 654 { 655 struct vidi_context *ctx = get_vidi_context(dev); 656 657 return vidi_power_on(ctx, false); 658 } 659 660 static int vidi_resume(struct device *dev) 661 { 662 struct vidi_context *ctx = get_vidi_context(dev); 663 664 return vidi_power_on(ctx, true); 665 } 666 #endif 667 668 static const struct dev_pm_ops vidi_pm_ops = { 669 SET_SYSTEM_SLEEP_PM_OPS(vidi_suspend, vidi_resume) 670 }; 671 672 struct platform_driver vidi_driver = { 673 .probe = vidi_probe, 674 .remove = __devexit_p(vidi_remove), 675 .driver = { 676 .name = "exynos-drm-vidi", 677 .owner = THIS_MODULE, 678 .pm = &vidi_pm_ops, 679 }, 680 }; 681