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