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 #include <drm/drm_atomic_helper.h> 24 25 #include "exynos_drm_drv.h" 26 #include "exynos_drm_crtc.h" 27 #include "exynos_drm_fb.h" 28 #include "exynos_drm_plane.h" 29 #include "exynos_drm_vidi.h" 30 31 /* vidi has totally three virtual windows. */ 32 #define WINDOWS_NR 3 33 34 #define ctx_from_connector(c) container_of(c, struct vidi_context, \ 35 connector) 36 37 struct vidi_context { 38 struct drm_encoder encoder; 39 struct platform_device *pdev; 40 struct drm_device *drm_dev; 41 struct exynos_drm_crtc *crtc; 42 struct drm_connector connector; 43 struct exynos_drm_plane planes[WINDOWS_NR]; 44 struct edid *raw_edid; 45 unsigned int clkdiv; 46 unsigned long irq_flags; 47 unsigned int connected; 48 bool vblank_on; 49 bool suspended; 50 bool direct_vblank; 51 struct work_struct work; 52 struct mutex lock; 53 int pipe; 54 }; 55 56 static inline struct vidi_context *encoder_to_vidi(struct drm_encoder *e) 57 { 58 return container_of(e, struct vidi_context, encoder); 59 } 60 61 static const char fake_edid_info[] = { 62 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x4c, 0x2d, 0x05, 0x05, 63 0x00, 0x00, 0x00, 0x00, 0x30, 0x12, 0x01, 0x03, 0x80, 0x10, 0x09, 0x78, 64 0x0a, 0xee, 0x91, 0xa3, 0x54, 0x4c, 0x99, 0x26, 0x0f, 0x50, 0x54, 0xbd, 65 0xee, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 66 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x66, 0x21, 0x50, 0xb0, 0x51, 0x00, 67 0x1b, 0x30, 0x40, 0x70, 0x36, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 68 0x01, 0x1d, 0x00, 0x72, 0x51, 0xd0, 0x1e, 0x20, 0x6e, 0x28, 0x55, 0x00, 69 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x18, 70 0x4b, 0x1a, 0x44, 0x17, 0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 71 0x00, 0x00, 0x00, 0xfc, 0x00, 0x53, 0x41, 0x4d, 0x53, 0x55, 0x4e, 0x47, 72 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x01, 0xbc, 0x02, 0x03, 0x1e, 0xf1, 73 0x46, 0x84, 0x05, 0x03, 0x10, 0x20, 0x22, 0x23, 0x09, 0x07, 0x07, 0x83, 74 0x01, 0x00, 0x00, 0xe2, 0x00, 0x0f, 0x67, 0x03, 0x0c, 0x00, 0x10, 0x00, 75 0xb8, 0x2d, 0x01, 0x1d, 0x80, 0x18, 0x71, 0x1c, 0x16, 0x20, 0x58, 0x2c, 76 0x25, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x9e, 0x8c, 0x0a, 0xd0, 0x8a, 77 0x20, 0xe0, 0x2d, 0x10, 0x10, 0x3e, 0x96, 0x00, 0xa0, 0x5a, 0x00, 0x00, 78 0x00, 0x18, 0x02, 0x3a, 0x80, 0x18, 0x71, 0x38, 0x2d, 0x40, 0x58, 0x2c, 79 0x45, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0x00, 80 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 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, 0x06 84 }; 85 86 static const uint32_t formats[] = { 87 DRM_FORMAT_XRGB8888, 88 DRM_FORMAT_ARGB8888, 89 DRM_FORMAT_NV12, 90 }; 91 92 static const enum drm_plane_type vidi_win_types[WINDOWS_NR] = { 93 DRM_PLANE_TYPE_PRIMARY, 94 DRM_PLANE_TYPE_OVERLAY, 95 DRM_PLANE_TYPE_CURSOR, 96 }; 97 98 static int vidi_enable_vblank(struct exynos_drm_crtc *crtc) 99 { 100 struct vidi_context *ctx = crtc->ctx; 101 102 if (ctx->suspended) 103 return -EPERM; 104 105 if (!test_and_set_bit(0, &ctx->irq_flags)) 106 ctx->vblank_on = true; 107 108 ctx->direct_vblank = true; 109 110 /* 111 * in case of page flip request, vidi_finish_pageflip function 112 * will not be called because direct_vblank is true and then 113 * that function will be called by crtc_ops->update_plane callback 114 */ 115 schedule_work(&ctx->work); 116 117 return 0; 118 } 119 120 static void vidi_disable_vblank(struct exynos_drm_crtc *crtc) 121 { 122 struct vidi_context *ctx = crtc->ctx; 123 124 if (ctx->suspended) 125 return; 126 127 if (test_and_clear_bit(0, &ctx->irq_flags)) 128 ctx->vblank_on = false; 129 } 130 131 static void vidi_update_plane(struct exynos_drm_crtc *crtc, 132 struct exynos_drm_plane *plane) 133 { 134 struct drm_plane_state *state = plane->base.state; 135 struct vidi_context *ctx = crtc->ctx; 136 dma_addr_t addr; 137 138 if (ctx->suspended) 139 return; 140 141 addr = exynos_drm_fb_dma_addr(state->fb, 0); 142 DRM_DEBUG_KMS("dma_addr = %pad\n", &addr); 143 144 if (ctx->vblank_on) 145 schedule_work(&ctx->work); 146 } 147 148 static void vidi_enable(struct exynos_drm_crtc *crtc) 149 { 150 struct vidi_context *ctx = crtc->ctx; 151 152 mutex_lock(&ctx->lock); 153 154 ctx->suspended = false; 155 156 /* if vblank was enabled status, enable it again. */ 157 if (test_and_clear_bit(0, &ctx->irq_flags)) 158 vidi_enable_vblank(ctx->crtc); 159 160 mutex_unlock(&ctx->lock); 161 } 162 163 static void vidi_disable(struct exynos_drm_crtc *crtc) 164 { 165 struct vidi_context *ctx = crtc->ctx; 166 167 mutex_lock(&ctx->lock); 168 169 ctx->suspended = true; 170 171 mutex_unlock(&ctx->lock); 172 } 173 174 static int vidi_ctx_initialize(struct vidi_context *ctx, 175 struct drm_device *drm_dev) 176 { 177 struct exynos_drm_private *priv = drm_dev->dev_private; 178 179 ctx->drm_dev = drm_dev; 180 ctx->pipe = priv->pipe++; 181 182 return 0; 183 } 184 185 static const struct exynos_drm_crtc_ops vidi_crtc_ops = { 186 .enable = vidi_enable, 187 .disable = vidi_disable, 188 .enable_vblank = vidi_enable_vblank, 189 .disable_vblank = vidi_disable_vblank, 190 .update_plane = vidi_update_plane, 191 }; 192 193 static void vidi_fake_vblank_handler(struct work_struct *work) 194 { 195 struct vidi_context *ctx = container_of(work, struct vidi_context, 196 work); 197 int win; 198 199 if (ctx->pipe < 0) 200 return; 201 202 /* refresh rate is about 50Hz. */ 203 usleep_range(16000, 20000); 204 205 mutex_lock(&ctx->lock); 206 207 if (ctx->direct_vblank) { 208 drm_crtc_handle_vblank(&ctx->crtc->base); 209 ctx->direct_vblank = false; 210 mutex_unlock(&ctx->lock); 211 return; 212 } 213 214 mutex_unlock(&ctx->lock); 215 216 for (win = 0 ; win < WINDOWS_NR ; win++) { 217 struct exynos_drm_plane *plane = &ctx->planes[win]; 218 219 if (!plane->pending_fb) 220 continue; 221 222 exynos_drm_crtc_finish_update(ctx->crtc, plane); 223 } 224 } 225 226 static ssize_t vidi_show_connection(struct device *dev, 227 struct device_attribute *attr, char *buf) 228 { 229 struct vidi_context *ctx = dev_get_drvdata(dev); 230 int rc; 231 232 mutex_lock(&ctx->lock); 233 234 rc = sprintf(buf, "%d\n", ctx->connected); 235 236 mutex_unlock(&ctx->lock); 237 238 return rc; 239 } 240 241 static ssize_t vidi_store_connection(struct device *dev, 242 struct device_attribute *attr, 243 const char *buf, size_t len) 244 { 245 struct vidi_context *ctx = dev_get_drvdata(dev); 246 int ret; 247 248 ret = kstrtoint(buf, 0, &ctx->connected); 249 if (ret) 250 return ret; 251 252 if (ctx->connected > 1) 253 return -EINVAL; 254 255 /* use fake edid data for test. */ 256 if (!ctx->raw_edid) 257 ctx->raw_edid = (struct edid *)fake_edid_info; 258 259 /* if raw_edid isn't same as fake data then it can't be tested. */ 260 if (ctx->raw_edid != (struct edid *)fake_edid_info) { 261 DRM_DEBUG_KMS("edid data is not fake data.\n"); 262 return -EINVAL; 263 } 264 265 DRM_DEBUG_KMS("requested connection.\n"); 266 267 drm_helper_hpd_irq_event(ctx->drm_dev); 268 269 return len; 270 } 271 272 static DEVICE_ATTR(connection, 0644, vidi_show_connection, 273 vidi_store_connection); 274 275 int vidi_connection_ioctl(struct drm_device *drm_dev, void *data, 276 struct drm_file *file_priv) 277 { 278 struct vidi_context *ctx = dev_get_drvdata(drm_dev->dev); 279 struct drm_exynos_vidi_connection *vidi = data; 280 281 if (!vidi) { 282 DRM_DEBUG_KMS("user data for vidi is null.\n"); 283 return -EINVAL; 284 } 285 286 if (vidi->connection > 1) { 287 DRM_DEBUG_KMS("connection should be 0 or 1.\n"); 288 return -EINVAL; 289 } 290 291 if (ctx->connected == vidi->connection) { 292 DRM_DEBUG_KMS("same connection request.\n"); 293 return -EINVAL; 294 } 295 296 if (vidi->connection) { 297 struct edid *raw_edid; 298 299 raw_edid = (struct edid *)(unsigned long)vidi->edid; 300 if (!drm_edid_is_valid(raw_edid)) { 301 DRM_DEBUG_KMS("edid data is invalid.\n"); 302 return -EINVAL; 303 } 304 ctx->raw_edid = drm_edid_duplicate(raw_edid); 305 if (!ctx->raw_edid) { 306 DRM_DEBUG_KMS("failed to allocate raw_edid.\n"); 307 return -ENOMEM; 308 } 309 } else { 310 /* 311 * with connection = 0, free raw_edid 312 * only if raw edid data isn't same as fake data. 313 */ 314 if (ctx->raw_edid && ctx->raw_edid != 315 (struct edid *)fake_edid_info) { 316 kfree(ctx->raw_edid); 317 ctx->raw_edid = NULL; 318 } 319 } 320 321 ctx->connected = vidi->connection; 322 drm_helper_hpd_irq_event(ctx->drm_dev); 323 324 return 0; 325 } 326 327 static enum drm_connector_status vidi_detect(struct drm_connector *connector, 328 bool force) 329 { 330 struct vidi_context *ctx = ctx_from_connector(connector); 331 332 /* 333 * connection request would come from user side 334 * to do hotplug through specific ioctl. 335 */ 336 return ctx->connected ? connector_status_connected : 337 connector_status_disconnected; 338 } 339 340 static void vidi_connector_destroy(struct drm_connector *connector) 341 { 342 } 343 344 static const struct drm_connector_funcs vidi_connector_funcs = { 345 .dpms = drm_atomic_helper_connector_dpms, 346 .fill_modes = drm_helper_probe_single_connector_modes, 347 .detect = vidi_detect, 348 .destroy = vidi_connector_destroy, 349 .reset = drm_atomic_helper_connector_reset, 350 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 351 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 352 }; 353 354 static int vidi_get_modes(struct drm_connector *connector) 355 { 356 struct vidi_context *ctx = ctx_from_connector(connector); 357 struct edid *edid; 358 int edid_len; 359 360 /* 361 * the edid data comes from user side and it would be set 362 * to ctx->raw_edid through specific ioctl. 363 */ 364 if (!ctx->raw_edid) { 365 DRM_DEBUG_KMS("raw_edid is null.\n"); 366 return -EFAULT; 367 } 368 369 edid_len = (1 + ctx->raw_edid->extensions) * EDID_LENGTH; 370 edid = kmemdup(ctx->raw_edid, edid_len, GFP_KERNEL); 371 if (!edid) { 372 DRM_DEBUG_KMS("failed to allocate edid\n"); 373 return -ENOMEM; 374 } 375 376 drm_mode_connector_update_edid_property(connector, edid); 377 378 return drm_add_edid_modes(connector, edid); 379 } 380 381 static struct drm_encoder *vidi_best_encoder(struct drm_connector *connector) 382 { 383 struct vidi_context *ctx = ctx_from_connector(connector); 384 385 return &ctx->encoder; 386 } 387 388 static const struct drm_connector_helper_funcs vidi_connector_helper_funcs = { 389 .get_modes = vidi_get_modes, 390 .best_encoder = vidi_best_encoder, 391 }; 392 393 static int vidi_create_connector(struct drm_encoder *encoder) 394 { 395 struct vidi_context *ctx = encoder_to_vidi(encoder); 396 struct drm_connector *connector = &ctx->connector; 397 int ret; 398 399 connector->polled = DRM_CONNECTOR_POLL_HPD; 400 401 ret = drm_connector_init(ctx->drm_dev, connector, 402 &vidi_connector_funcs, DRM_MODE_CONNECTOR_VIRTUAL); 403 if (ret) { 404 DRM_ERROR("Failed to initialize connector with drm\n"); 405 return ret; 406 } 407 408 drm_connector_helper_add(connector, &vidi_connector_helper_funcs); 409 drm_connector_register(connector); 410 drm_mode_connector_attach_encoder(connector, encoder); 411 412 return 0; 413 } 414 415 static void exynos_vidi_mode_set(struct drm_encoder *encoder, 416 struct drm_display_mode *mode, 417 struct drm_display_mode *adjusted_mode) 418 { 419 } 420 421 static void exynos_vidi_enable(struct drm_encoder *encoder) 422 { 423 } 424 425 static void exynos_vidi_disable(struct drm_encoder *encoder) 426 { 427 } 428 429 static const struct drm_encoder_helper_funcs exynos_vidi_encoder_helper_funcs = { 430 .mode_set = exynos_vidi_mode_set, 431 .enable = exynos_vidi_enable, 432 .disable = exynos_vidi_disable, 433 }; 434 435 static const struct drm_encoder_funcs exynos_vidi_encoder_funcs = { 436 .destroy = drm_encoder_cleanup, 437 }; 438 439 static int vidi_bind(struct device *dev, struct device *master, void *data) 440 { 441 struct vidi_context *ctx = dev_get_drvdata(dev); 442 struct drm_device *drm_dev = data; 443 struct drm_encoder *encoder = &ctx->encoder; 444 struct exynos_drm_plane *exynos_plane; 445 struct exynos_drm_plane_config plane_config = { 0 }; 446 unsigned int i; 447 int pipe, ret; 448 449 vidi_ctx_initialize(ctx, drm_dev); 450 451 plane_config.pixel_formats = formats; 452 plane_config.num_pixel_formats = ARRAY_SIZE(formats); 453 454 for (i = 0; i < WINDOWS_NR; i++) { 455 plane_config.zpos = i; 456 plane_config.type = vidi_win_types[i]; 457 458 ret = exynos_plane_init(drm_dev, &ctx->planes[i], i, 459 1 << ctx->pipe, &plane_config); 460 if (ret) 461 return ret; 462 } 463 464 exynos_plane = &ctx->planes[DEFAULT_WIN]; 465 ctx->crtc = exynos_drm_crtc_create(drm_dev, &exynos_plane->base, 466 ctx->pipe, EXYNOS_DISPLAY_TYPE_VIDI, 467 &vidi_crtc_ops, ctx); 468 if (IS_ERR(ctx->crtc)) { 469 DRM_ERROR("failed to create crtc.\n"); 470 return PTR_ERR(ctx->crtc); 471 } 472 473 pipe = exynos_drm_crtc_get_pipe_from_type(drm_dev, 474 EXYNOS_DISPLAY_TYPE_VIDI); 475 if (pipe < 0) 476 return pipe; 477 478 encoder->possible_crtcs = 1 << pipe; 479 480 DRM_DEBUG_KMS("possible_crtcs = 0x%x\n", encoder->possible_crtcs); 481 482 drm_encoder_init(drm_dev, encoder, &exynos_vidi_encoder_funcs, 483 DRM_MODE_ENCODER_TMDS, NULL); 484 485 drm_encoder_helper_add(encoder, &exynos_vidi_encoder_helper_funcs); 486 487 ret = vidi_create_connector(encoder); 488 if (ret) { 489 DRM_ERROR("failed to create connector ret = %d\n", ret); 490 drm_encoder_cleanup(encoder); 491 return ret; 492 } 493 494 return 0; 495 } 496 497 498 static void vidi_unbind(struct device *dev, struct device *master, void *data) 499 { 500 } 501 502 static const struct component_ops vidi_component_ops = { 503 .bind = vidi_bind, 504 .unbind = vidi_unbind, 505 }; 506 507 static int vidi_probe(struct platform_device *pdev) 508 { 509 struct vidi_context *ctx; 510 int ret; 511 512 ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL); 513 if (!ctx) 514 return -ENOMEM; 515 516 ctx->pdev = pdev; 517 518 INIT_WORK(&ctx->work, vidi_fake_vblank_handler); 519 520 mutex_init(&ctx->lock); 521 522 platform_set_drvdata(pdev, ctx); 523 524 ret = device_create_file(&pdev->dev, &dev_attr_connection); 525 if (ret < 0) { 526 DRM_ERROR("failed to create connection sysfs.\n"); 527 return ret; 528 } 529 530 ret = component_add(&pdev->dev, &vidi_component_ops); 531 if (ret) 532 goto err_remove_file; 533 534 return ret; 535 536 err_remove_file: 537 device_remove_file(&pdev->dev, &dev_attr_connection); 538 539 return ret; 540 } 541 542 static int vidi_remove(struct platform_device *pdev) 543 { 544 struct vidi_context *ctx = platform_get_drvdata(pdev); 545 546 if (ctx->raw_edid != (struct edid *)fake_edid_info) { 547 kfree(ctx->raw_edid); 548 ctx->raw_edid = NULL; 549 550 return -EINVAL; 551 } 552 553 component_del(&pdev->dev, &vidi_component_ops); 554 555 return 0; 556 } 557 558 struct platform_driver vidi_driver = { 559 .probe = vidi_probe, 560 .remove = vidi_remove, 561 .driver = { 562 .name = "exynos-drm-vidi", 563 .owner = THIS_MODULE, 564 }, 565 }; 566