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 <drm/drmP.h> 14 15 #include <linux/kernel.h> 16 #include <linux/platform_device.h> 17 18 #include <drm/exynos_drm.h> 19 20 #include <drm/drm_edid.h> 21 #include <drm/drm_crtc_helper.h> 22 23 #include "exynos_drm_drv.h" 24 #include "exynos_drm_crtc.h" 25 #include "exynos_drm_encoder.h" 26 #include "exynos_drm_vidi.h" 27 28 /* vidi has totally three virtual windows. */ 29 #define WINDOWS_NR 3 30 31 #define get_vidi_mgr(dev) platform_get_drvdata(to_platform_device(dev)) 32 #define ctx_from_connector(c) container_of(c, struct vidi_context, \ 33 connector) 34 35 struct vidi_win_data { 36 unsigned int offset_x; 37 unsigned int offset_y; 38 unsigned int ovl_width; 39 unsigned int ovl_height; 40 unsigned int fb_width; 41 unsigned int fb_height; 42 unsigned int bpp; 43 dma_addr_t dma_addr; 44 unsigned int buf_offsize; 45 unsigned int line_size; /* bytes */ 46 bool enabled; 47 }; 48 49 struct vidi_context { 50 struct drm_device *drm_dev; 51 struct drm_crtc *crtc; 52 struct drm_encoder *encoder; 53 struct drm_connector connector; 54 struct exynos_drm_subdrv subdrv; 55 struct vidi_win_data win_data[WINDOWS_NR]; 56 struct edid *raw_edid; 57 unsigned int clkdiv; 58 unsigned int default_win; 59 unsigned long irq_flags; 60 unsigned int connected; 61 bool vblank_on; 62 bool suspended; 63 bool direct_vblank; 64 struct work_struct work; 65 struct mutex lock; 66 int pipe; 67 }; 68 69 static const char fake_edid_info[] = { 70 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x4c, 0x2d, 0x05, 0x05, 71 0x00, 0x00, 0x00, 0x00, 0x30, 0x12, 0x01, 0x03, 0x80, 0x10, 0x09, 0x78, 72 0x0a, 0xee, 0x91, 0xa3, 0x54, 0x4c, 0x99, 0x26, 0x0f, 0x50, 0x54, 0xbd, 73 0xee, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 74 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x66, 0x21, 0x50, 0xb0, 0x51, 0x00, 75 0x1b, 0x30, 0x40, 0x70, 0x36, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 76 0x01, 0x1d, 0x00, 0x72, 0x51, 0xd0, 0x1e, 0x20, 0x6e, 0x28, 0x55, 0x00, 77 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x18, 78 0x4b, 0x1a, 0x44, 0x17, 0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 79 0x00, 0x00, 0x00, 0xfc, 0x00, 0x53, 0x41, 0x4d, 0x53, 0x55, 0x4e, 0x47, 80 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x01, 0xbc, 0x02, 0x03, 0x1e, 0xf1, 81 0x46, 0x84, 0x05, 0x03, 0x10, 0x20, 0x22, 0x23, 0x09, 0x07, 0x07, 0x83, 82 0x01, 0x00, 0x00, 0xe2, 0x00, 0x0f, 0x67, 0x03, 0x0c, 0x00, 0x10, 0x00, 83 0xb8, 0x2d, 0x01, 0x1d, 0x80, 0x18, 0x71, 0x1c, 0x16, 0x20, 0x58, 0x2c, 84 0x25, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x9e, 0x8c, 0x0a, 0xd0, 0x8a, 85 0x20, 0xe0, 0x2d, 0x10, 0x10, 0x3e, 0x96, 0x00, 0xa0, 0x5a, 0x00, 0x00, 86 0x00, 0x18, 0x02, 0x3a, 0x80, 0x18, 0x71, 0x38, 0x2d, 0x40, 0x58, 0x2c, 87 0x45, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0x00, 88 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 89 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 90 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 91 0x00, 0x00, 0x00, 0x06 92 }; 93 94 static void vidi_apply(struct exynos_drm_manager *mgr) 95 { 96 struct vidi_context *ctx = mgr->ctx; 97 struct exynos_drm_manager_ops *mgr_ops = mgr->ops; 98 struct vidi_win_data *win_data; 99 int i; 100 101 for (i = 0; i < WINDOWS_NR; i++) { 102 win_data = &ctx->win_data[i]; 103 if (win_data->enabled && (mgr_ops && mgr_ops->win_commit)) 104 mgr_ops->win_commit(mgr, i); 105 } 106 107 if (mgr_ops && mgr_ops->commit) 108 mgr_ops->commit(mgr); 109 } 110 111 static void vidi_commit(struct exynos_drm_manager *mgr) 112 { 113 struct vidi_context *ctx = mgr->ctx; 114 115 if (ctx->suspended) 116 return; 117 } 118 119 static int vidi_enable_vblank(struct exynos_drm_manager *mgr) 120 { 121 struct vidi_context *ctx = mgr->ctx; 122 123 if (ctx->suspended) 124 return -EPERM; 125 126 if (!test_and_set_bit(0, &ctx->irq_flags)) 127 ctx->vblank_on = true; 128 129 ctx->direct_vblank = true; 130 131 /* 132 * in case of page flip request, vidi_finish_pageflip function 133 * will not be called because direct_vblank is true and then 134 * that function will be called by manager_ops->win_commit callback 135 */ 136 schedule_work(&ctx->work); 137 138 return 0; 139 } 140 141 static void vidi_disable_vblank(struct exynos_drm_manager *mgr) 142 { 143 struct vidi_context *ctx = mgr->ctx; 144 145 if (ctx->suspended) 146 return; 147 148 if (test_and_clear_bit(0, &ctx->irq_flags)) 149 ctx->vblank_on = false; 150 } 151 152 static void vidi_win_mode_set(struct exynos_drm_manager *mgr, 153 struct exynos_drm_overlay *overlay) 154 { 155 struct vidi_context *ctx = mgr->ctx; 156 struct vidi_win_data *win_data; 157 int win; 158 unsigned long offset; 159 160 if (!overlay) { 161 DRM_ERROR("overlay is NULL\n"); 162 return; 163 } 164 165 win = overlay->zpos; 166 if (win == DEFAULT_ZPOS) 167 win = ctx->default_win; 168 169 if (win < 0 || win >= WINDOWS_NR) 170 return; 171 172 offset = overlay->fb_x * (overlay->bpp >> 3); 173 offset += overlay->fb_y * overlay->pitch; 174 175 DRM_DEBUG_KMS("offset = 0x%lx, pitch = %x\n", offset, overlay->pitch); 176 177 win_data = &ctx->win_data[win]; 178 179 win_data->offset_x = overlay->crtc_x; 180 win_data->offset_y = overlay->crtc_y; 181 win_data->ovl_width = overlay->crtc_width; 182 win_data->ovl_height = overlay->crtc_height; 183 win_data->fb_width = overlay->fb_width; 184 win_data->fb_height = overlay->fb_height; 185 win_data->dma_addr = overlay->dma_addr[0] + offset; 186 win_data->bpp = overlay->bpp; 187 win_data->buf_offsize = (overlay->fb_width - overlay->crtc_width) * 188 (overlay->bpp >> 3); 189 win_data->line_size = overlay->crtc_width * (overlay->bpp >> 3); 190 191 /* 192 * some parts of win_data should be transferred to user side 193 * through specific ioctl. 194 */ 195 196 DRM_DEBUG_KMS("offset_x = %d, offset_y = %d\n", 197 win_data->offset_x, win_data->offset_y); 198 DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n", 199 win_data->ovl_width, win_data->ovl_height); 200 DRM_DEBUG_KMS("paddr = 0x%lx\n", (unsigned long)win_data->dma_addr); 201 DRM_DEBUG_KMS("fb_width = %d, crtc_width = %d\n", 202 overlay->fb_width, overlay->crtc_width); 203 } 204 205 static void vidi_win_commit(struct exynos_drm_manager *mgr, int zpos) 206 { 207 struct vidi_context *ctx = mgr->ctx; 208 struct vidi_win_data *win_data; 209 int win = zpos; 210 211 if (ctx->suspended) 212 return; 213 214 if (win == DEFAULT_ZPOS) 215 win = ctx->default_win; 216 217 if (win < 0 || win >= WINDOWS_NR) 218 return; 219 220 win_data = &ctx->win_data[win]; 221 222 win_data->enabled = true; 223 224 DRM_DEBUG_KMS("dma_addr = %pad\n", &win_data->dma_addr); 225 226 if (ctx->vblank_on) 227 schedule_work(&ctx->work); 228 } 229 230 static void vidi_win_disable(struct exynos_drm_manager *mgr, int zpos) 231 { 232 struct vidi_context *ctx = mgr->ctx; 233 struct vidi_win_data *win_data; 234 int win = zpos; 235 236 if (win == DEFAULT_ZPOS) 237 win = ctx->default_win; 238 239 if (win < 0 || win >= WINDOWS_NR) 240 return; 241 242 win_data = &ctx->win_data[win]; 243 win_data->enabled = false; 244 245 /* TODO. */ 246 } 247 248 static int vidi_power_on(struct exynos_drm_manager *mgr, bool enable) 249 { 250 struct vidi_context *ctx = mgr->ctx; 251 252 DRM_DEBUG_KMS("%s\n", __FILE__); 253 254 if (enable != false && enable != true) 255 return -EINVAL; 256 257 if (enable) { 258 ctx->suspended = false; 259 260 /* if vblank was enabled status, enable it again. */ 261 if (test_and_clear_bit(0, &ctx->irq_flags)) 262 vidi_enable_vblank(mgr); 263 264 vidi_apply(mgr); 265 } else { 266 ctx->suspended = true; 267 } 268 269 return 0; 270 } 271 272 static void vidi_dpms(struct exynos_drm_manager *mgr, int mode) 273 { 274 struct vidi_context *ctx = mgr->ctx; 275 276 DRM_DEBUG_KMS("%d\n", mode); 277 278 mutex_lock(&ctx->lock); 279 280 switch (mode) { 281 case DRM_MODE_DPMS_ON: 282 vidi_power_on(mgr, true); 283 break; 284 case DRM_MODE_DPMS_STANDBY: 285 case DRM_MODE_DPMS_SUSPEND: 286 case DRM_MODE_DPMS_OFF: 287 vidi_power_on(mgr, false); 288 break; 289 default: 290 DRM_DEBUG_KMS("unspecified mode %d\n", mode); 291 break; 292 } 293 294 mutex_unlock(&ctx->lock); 295 } 296 297 static int vidi_mgr_initialize(struct exynos_drm_manager *mgr, 298 struct drm_device *drm_dev) 299 { 300 struct vidi_context *ctx = mgr->ctx; 301 struct exynos_drm_private *priv = drm_dev->dev_private; 302 303 mgr->drm_dev = ctx->drm_dev = drm_dev; 304 mgr->pipe = ctx->pipe = priv->pipe++; 305 306 return 0; 307 } 308 309 static struct exynos_drm_manager_ops vidi_manager_ops = { 310 .dpms = vidi_dpms, 311 .commit = vidi_commit, 312 .enable_vblank = vidi_enable_vblank, 313 .disable_vblank = vidi_disable_vblank, 314 .win_mode_set = vidi_win_mode_set, 315 .win_commit = vidi_win_commit, 316 .win_disable = vidi_win_disable, 317 }; 318 319 static struct exynos_drm_manager vidi_manager = { 320 .type = EXYNOS_DISPLAY_TYPE_VIDI, 321 .ops = &vidi_manager_ops, 322 }; 323 324 static void vidi_fake_vblank_handler(struct work_struct *work) 325 { 326 struct vidi_context *ctx = container_of(work, struct vidi_context, 327 work); 328 329 if (ctx->pipe < 0) 330 return; 331 332 /* refresh rate is about 50Hz. */ 333 usleep_range(16000, 20000); 334 335 mutex_lock(&ctx->lock); 336 337 if (ctx->direct_vblank) { 338 drm_handle_vblank(ctx->drm_dev, ctx->pipe); 339 ctx->direct_vblank = false; 340 mutex_unlock(&ctx->lock); 341 return; 342 } 343 344 mutex_unlock(&ctx->lock); 345 346 exynos_drm_crtc_finish_pageflip(ctx->drm_dev, ctx->pipe); 347 } 348 349 static int vidi_show_connection(struct device *dev, 350 struct device_attribute *attr, char *buf) 351 { 352 int rc; 353 struct exynos_drm_manager *mgr = get_vidi_mgr(dev); 354 struct vidi_context *ctx = mgr->ctx; 355 356 mutex_lock(&ctx->lock); 357 358 rc = sprintf(buf, "%d\n", ctx->connected); 359 360 mutex_unlock(&ctx->lock); 361 362 return rc; 363 } 364 365 static int vidi_store_connection(struct device *dev, 366 struct device_attribute *attr, 367 const char *buf, size_t len) 368 { 369 struct exynos_drm_manager *mgr = get_vidi_mgr(dev); 370 struct vidi_context *ctx = mgr->ctx; 371 int ret; 372 373 ret = kstrtoint(buf, 0, &ctx->connected); 374 if (ret) 375 return ret; 376 377 if (ctx->connected > 1) 378 return -EINVAL; 379 380 /* use fake edid data for test. */ 381 if (!ctx->raw_edid) 382 ctx->raw_edid = (struct edid *)fake_edid_info; 383 384 /* if raw_edid isn't same as fake data then it can't be tested. */ 385 if (ctx->raw_edid != (struct edid *)fake_edid_info) { 386 DRM_DEBUG_KMS("edid data is not fake data.\n"); 387 return -EINVAL; 388 } 389 390 DRM_DEBUG_KMS("requested connection.\n"); 391 392 drm_helper_hpd_irq_event(ctx->drm_dev); 393 394 return len; 395 } 396 397 static DEVICE_ATTR(connection, 0644, vidi_show_connection, 398 vidi_store_connection); 399 400 int vidi_connection_ioctl(struct drm_device *drm_dev, void *data, 401 struct drm_file *file_priv) 402 { 403 struct vidi_context *ctx = NULL; 404 struct drm_encoder *encoder; 405 struct exynos_drm_display *display; 406 struct drm_exynos_vidi_connection *vidi = data; 407 408 if (!vidi) { 409 DRM_DEBUG_KMS("user data for vidi is null.\n"); 410 return -EINVAL; 411 } 412 413 if (vidi->connection > 1) { 414 DRM_DEBUG_KMS("connection should be 0 or 1.\n"); 415 return -EINVAL; 416 } 417 418 list_for_each_entry(encoder, &drm_dev->mode_config.encoder_list, 419 head) { 420 display = exynos_drm_get_display(encoder); 421 422 if (display->type == EXYNOS_DISPLAY_TYPE_VIDI) { 423 ctx = display->ctx; 424 break; 425 } 426 } 427 428 if (!ctx) { 429 DRM_DEBUG_KMS("not found virtual device type encoder.\n"); 430 return -EINVAL; 431 } 432 433 if (ctx->connected == vidi->connection) { 434 DRM_DEBUG_KMS("same connection request.\n"); 435 return -EINVAL; 436 } 437 438 if (vidi->connection) { 439 struct edid *raw_edid = (struct edid *)(uint32_t)vidi->edid; 440 if (!drm_edid_is_valid(raw_edid)) { 441 DRM_DEBUG_KMS("edid data is invalid.\n"); 442 return -EINVAL; 443 } 444 ctx->raw_edid = drm_edid_duplicate(raw_edid); 445 if (!ctx->raw_edid) { 446 DRM_DEBUG_KMS("failed to allocate raw_edid.\n"); 447 return -ENOMEM; 448 } 449 } else { 450 /* 451 * with connection = 0, free raw_edid 452 * only if raw edid data isn't same as fake data. 453 */ 454 if (ctx->raw_edid && ctx->raw_edid != 455 (struct edid *)fake_edid_info) { 456 kfree(ctx->raw_edid); 457 ctx->raw_edid = NULL; 458 } 459 } 460 461 ctx->connected = vidi->connection; 462 drm_helper_hpd_irq_event(ctx->drm_dev); 463 464 return 0; 465 } 466 467 static enum drm_connector_status vidi_detect(struct drm_connector *connector, 468 bool force) 469 { 470 struct vidi_context *ctx = ctx_from_connector(connector); 471 472 /* 473 * connection request would come from user side 474 * to do hotplug through specific ioctl. 475 */ 476 return ctx->connected ? connector_status_connected : 477 connector_status_disconnected; 478 } 479 480 static void vidi_connector_destroy(struct drm_connector *connector) 481 { 482 } 483 484 static struct drm_connector_funcs vidi_connector_funcs = { 485 .dpms = drm_helper_connector_dpms, 486 .fill_modes = drm_helper_probe_single_connector_modes, 487 .detect = vidi_detect, 488 .destroy = vidi_connector_destroy, 489 }; 490 491 static int vidi_get_modes(struct drm_connector *connector) 492 { 493 struct vidi_context *ctx = ctx_from_connector(connector); 494 struct edid *edid; 495 int edid_len; 496 497 /* 498 * the edid data comes from user side and it would be set 499 * to ctx->raw_edid through specific ioctl. 500 */ 501 if (!ctx->raw_edid) { 502 DRM_DEBUG_KMS("raw_edid is null.\n"); 503 return -EFAULT; 504 } 505 506 edid_len = (1 + ctx->raw_edid->extensions) * EDID_LENGTH; 507 edid = kmemdup(ctx->raw_edid, edid_len, GFP_KERNEL); 508 if (!edid) { 509 DRM_DEBUG_KMS("failed to allocate edid\n"); 510 return -ENOMEM; 511 } 512 513 drm_mode_connector_update_edid_property(connector, edid); 514 515 return drm_add_edid_modes(connector, edid); 516 } 517 518 static struct drm_encoder *vidi_best_encoder(struct drm_connector *connector) 519 { 520 struct vidi_context *ctx = ctx_from_connector(connector); 521 522 return ctx->encoder; 523 } 524 525 static struct drm_connector_helper_funcs vidi_connector_helper_funcs = { 526 .get_modes = vidi_get_modes, 527 .best_encoder = vidi_best_encoder, 528 }; 529 530 static int vidi_create_connector(struct exynos_drm_display *display, 531 struct drm_encoder *encoder) 532 { 533 struct vidi_context *ctx = display->ctx; 534 struct drm_connector *connector = &ctx->connector; 535 int ret; 536 537 ctx->encoder = encoder; 538 connector->polled = DRM_CONNECTOR_POLL_HPD; 539 540 ret = drm_connector_init(ctx->drm_dev, connector, 541 &vidi_connector_funcs, DRM_MODE_CONNECTOR_VIRTUAL); 542 if (ret) { 543 DRM_ERROR("Failed to initialize connector with drm\n"); 544 return ret; 545 } 546 547 drm_connector_helper_add(connector, &vidi_connector_helper_funcs); 548 drm_connector_register(connector); 549 drm_mode_connector_attach_encoder(connector, encoder); 550 551 return 0; 552 } 553 554 555 static struct exynos_drm_display_ops vidi_display_ops = { 556 .create_connector = vidi_create_connector, 557 }; 558 559 static struct exynos_drm_display vidi_display = { 560 .type = EXYNOS_DISPLAY_TYPE_VIDI, 561 .ops = &vidi_display_ops, 562 }; 563 564 static int vidi_subdrv_probe(struct drm_device *drm_dev, struct device *dev) 565 { 566 struct exynos_drm_manager *mgr = get_vidi_mgr(dev); 567 struct vidi_context *ctx = mgr->ctx; 568 struct drm_crtc *crtc = ctx->crtc; 569 int ret; 570 571 vidi_mgr_initialize(mgr, drm_dev); 572 573 ret = exynos_drm_crtc_create(&vidi_manager); 574 if (ret) { 575 DRM_ERROR("failed to create crtc.\n"); 576 return ret; 577 } 578 579 ret = exynos_drm_create_enc_conn(drm_dev, &vidi_display); 580 if (ret) { 581 crtc->funcs->destroy(crtc); 582 DRM_ERROR("failed to create encoder and connector.\n"); 583 return ret; 584 } 585 586 return 0; 587 } 588 589 static int vidi_probe(struct platform_device *pdev) 590 { 591 struct exynos_drm_subdrv *subdrv; 592 struct vidi_context *ctx; 593 int ret; 594 595 ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL); 596 if (!ctx) 597 return -ENOMEM; 598 599 ctx->default_win = 0; 600 601 INIT_WORK(&ctx->work, vidi_fake_vblank_handler); 602 603 vidi_manager.ctx = ctx; 604 vidi_display.ctx = ctx; 605 606 mutex_init(&ctx->lock); 607 608 platform_set_drvdata(pdev, &vidi_manager); 609 610 subdrv = &ctx->subdrv; 611 subdrv->dev = &pdev->dev; 612 subdrv->probe = vidi_subdrv_probe; 613 614 ret = exynos_drm_subdrv_register(subdrv); 615 if (ret < 0) { 616 dev_err(&pdev->dev, "failed to register drm vidi device\n"); 617 return ret; 618 } 619 620 ret = device_create_file(&pdev->dev, &dev_attr_connection); 621 if (ret < 0) { 622 exynos_drm_subdrv_unregister(subdrv); 623 DRM_INFO("failed to create connection sysfs.\n"); 624 } 625 626 return 0; 627 } 628 629 static int vidi_remove(struct platform_device *pdev) 630 { 631 struct exynos_drm_manager *mgr = platform_get_drvdata(pdev); 632 struct vidi_context *ctx = mgr->ctx; 633 634 if (ctx->raw_edid != (struct edid *)fake_edid_info) { 635 kfree(ctx->raw_edid); 636 ctx->raw_edid = NULL; 637 638 return -EINVAL; 639 } 640 641 return 0; 642 } 643 644 struct platform_driver vidi_driver = { 645 .probe = vidi_probe, 646 .remove = vidi_remove, 647 .driver = { 648 .name = "exynos-drm-vidi", 649 .owner = THIS_MODULE, 650 }, 651 }; 652 653 int exynos_drm_probe_vidi(void) 654 { 655 struct platform_device *pdev; 656 int ret; 657 658 pdev = platform_device_register_simple("exynos-drm-vidi", -1, NULL, 0); 659 if (IS_ERR(pdev)) 660 return PTR_ERR(pdev); 661 662 ret = platform_driver_register(&vidi_driver); 663 if (ret) { 664 platform_device_unregister(pdev); 665 return ret; 666 } 667 668 return ret; 669 } 670 671 void exynos_drm_remove_vidi(void) 672 { 673 struct vidi_context *ctx = vidi_manager.ctx; 674 struct exynos_drm_subdrv *subdrv = &ctx->subdrv; 675 struct platform_device *pdev = to_platform_device(subdrv->dev); 676 677 platform_driver_unregister(&vidi_driver); 678 platform_device_unregister(pdev); 679 } 680