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_plane.h" 28 #include "exynos_drm_vidi.h" 29 30 /* vidi has totally three virtual windows. */ 31 #define WINDOWS_NR 3 32 #define CURSOR_WIN 2 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 int vidi_enable_vblank(struct exynos_drm_crtc *crtc) 93 { 94 struct vidi_context *ctx = crtc->ctx; 95 96 if (ctx->suspended) 97 return -EPERM; 98 99 if (!test_and_set_bit(0, &ctx->irq_flags)) 100 ctx->vblank_on = true; 101 102 ctx->direct_vblank = true; 103 104 /* 105 * in case of page flip request, vidi_finish_pageflip function 106 * will not be called because direct_vblank is true and then 107 * that function will be called by crtc_ops->update_plane callback 108 */ 109 schedule_work(&ctx->work); 110 111 return 0; 112 } 113 114 static void vidi_disable_vblank(struct exynos_drm_crtc *crtc) 115 { 116 struct vidi_context *ctx = crtc->ctx; 117 118 if (ctx->suspended) 119 return; 120 121 if (test_and_clear_bit(0, &ctx->irq_flags)) 122 ctx->vblank_on = false; 123 } 124 125 static void vidi_update_plane(struct exynos_drm_crtc *crtc, 126 struct exynos_drm_plane *plane) 127 { 128 struct vidi_context *ctx = crtc->ctx; 129 130 if (ctx->suspended) 131 return; 132 133 DRM_DEBUG_KMS("dma_addr = %pad\n", plane->dma_addr); 134 135 if (ctx->vblank_on) 136 schedule_work(&ctx->work); 137 } 138 139 static void vidi_enable(struct exynos_drm_crtc *crtc) 140 { 141 struct vidi_context *ctx = crtc->ctx; 142 143 mutex_lock(&ctx->lock); 144 145 ctx->suspended = false; 146 147 /* if vblank was enabled status, enable it again. */ 148 if (test_and_clear_bit(0, &ctx->irq_flags)) 149 vidi_enable_vblank(ctx->crtc); 150 151 mutex_unlock(&ctx->lock); 152 } 153 154 static void vidi_disable(struct exynos_drm_crtc *crtc) 155 { 156 struct vidi_context *ctx = crtc->ctx; 157 158 mutex_lock(&ctx->lock); 159 160 ctx->suspended = true; 161 162 mutex_unlock(&ctx->lock); 163 } 164 165 static int vidi_ctx_initialize(struct vidi_context *ctx, 166 struct drm_device *drm_dev) 167 { 168 struct exynos_drm_private *priv = drm_dev->dev_private; 169 170 ctx->drm_dev = drm_dev; 171 ctx->pipe = priv->pipe++; 172 173 return 0; 174 } 175 176 static const struct exynos_drm_crtc_ops vidi_crtc_ops = { 177 .enable = vidi_enable, 178 .disable = vidi_disable, 179 .enable_vblank = vidi_enable_vblank, 180 .disable_vblank = vidi_disable_vblank, 181 .update_plane = vidi_update_plane, 182 }; 183 184 static void vidi_fake_vblank_handler(struct work_struct *work) 185 { 186 struct vidi_context *ctx = container_of(work, struct vidi_context, 187 work); 188 int win; 189 190 if (ctx->pipe < 0) 191 return; 192 193 /* refresh rate is about 50Hz. */ 194 usleep_range(16000, 20000); 195 196 mutex_lock(&ctx->lock); 197 198 if (ctx->direct_vblank) { 199 drm_crtc_handle_vblank(&ctx->crtc->base); 200 ctx->direct_vblank = false; 201 mutex_unlock(&ctx->lock); 202 return; 203 } 204 205 mutex_unlock(&ctx->lock); 206 207 for (win = 0 ; win < WINDOWS_NR ; win++) { 208 struct exynos_drm_plane *plane = &ctx->planes[win]; 209 210 if (!plane->pending_fb) 211 continue; 212 213 exynos_drm_crtc_finish_update(ctx->crtc, plane); 214 } 215 } 216 217 static int vidi_show_connection(struct device *dev, 218 struct device_attribute *attr, char *buf) 219 { 220 struct vidi_context *ctx = dev_get_drvdata(dev); 221 int rc; 222 223 mutex_lock(&ctx->lock); 224 225 rc = sprintf(buf, "%d\n", ctx->connected); 226 227 mutex_unlock(&ctx->lock); 228 229 return rc; 230 } 231 232 static int vidi_store_connection(struct device *dev, 233 struct device_attribute *attr, 234 const char *buf, size_t len) 235 { 236 struct vidi_context *ctx = dev_get_drvdata(dev); 237 int ret; 238 239 ret = kstrtoint(buf, 0, &ctx->connected); 240 if (ret) 241 return ret; 242 243 if (ctx->connected > 1) 244 return -EINVAL; 245 246 /* use fake edid data for test. */ 247 if (!ctx->raw_edid) 248 ctx->raw_edid = (struct edid *)fake_edid_info; 249 250 /* if raw_edid isn't same as fake data then it can't be tested. */ 251 if (ctx->raw_edid != (struct edid *)fake_edid_info) { 252 DRM_DEBUG_KMS("edid data is not fake data.\n"); 253 return -EINVAL; 254 } 255 256 DRM_DEBUG_KMS("requested connection.\n"); 257 258 drm_helper_hpd_irq_event(ctx->drm_dev); 259 260 return len; 261 } 262 263 static DEVICE_ATTR(connection, 0644, vidi_show_connection, 264 vidi_store_connection); 265 266 int vidi_connection_ioctl(struct drm_device *drm_dev, void *data, 267 struct drm_file *file_priv) 268 { 269 struct vidi_context *ctx = dev_get_drvdata(drm_dev->dev); 270 struct drm_exynos_vidi_connection *vidi = data; 271 272 if (!vidi) { 273 DRM_DEBUG_KMS("user data for vidi is null.\n"); 274 return -EINVAL; 275 } 276 277 if (vidi->connection > 1) { 278 DRM_DEBUG_KMS("connection should be 0 or 1.\n"); 279 return -EINVAL; 280 } 281 282 if (ctx->connected == vidi->connection) { 283 DRM_DEBUG_KMS("same connection request.\n"); 284 return -EINVAL; 285 } 286 287 if (vidi->connection) { 288 struct edid *raw_edid = (struct edid *)(uint32_t)vidi->edid; 289 if (!drm_edid_is_valid(raw_edid)) { 290 DRM_DEBUG_KMS("edid data is invalid.\n"); 291 return -EINVAL; 292 } 293 ctx->raw_edid = drm_edid_duplicate(raw_edid); 294 if (!ctx->raw_edid) { 295 DRM_DEBUG_KMS("failed to allocate raw_edid.\n"); 296 return -ENOMEM; 297 } 298 } else { 299 /* 300 * with connection = 0, free raw_edid 301 * only if raw edid data isn't same as fake data. 302 */ 303 if (ctx->raw_edid && ctx->raw_edid != 304 (struct edid *)fake_edid_info) { 305 kfree(ctx->raw_edid); 306 ctx->raw_edid = NULL; 307 } 308 } 309 310 ctx->connected = vidi->connection; 311 drm_helper_hpd_irq_event(ctx->drm_dev); 312 313 return 0; 314 } 315 316 static enum drm_connector_status vidi_detect(struct drm_connector *connector, 317 bool force) 318 { 319 struct vidi_context *ctx = ctx_from_connector(connector); 320 321 /* 322 * connection request would come from user side 323 * to do hotplug through specific ioctl. 324 */ 325 return ctx->connected ? connector_status_connected : 326 connector_status_disconnected; 327 } 328 329 static void vidi_connector_destroy(struct drm_connector *connector) 330 { 331 } 332 333 static struct drm_connector_funcs vidi_connector_funcs = { 334 .dpms = drm_atomic_helper_connector_dpms, 335 .fill_modes = drm_helper_probe_single_connector_modes, 336 .detect = vidi_detect, 337 .destroy = vidi_connector_destroy, 338 .reset = drm_atomic_helper_connector_reset, 339 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 340 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 341 }; 342 343 static int vidi_get_modes(struct drm_connector *connector) 344 { 345 struct vidi_context *ctx = ctx_from_connector(connector); 346 struct edid *edid; 347 int edid_len; 348 349 /* 350 * the edid data comes from user side and it would be set 351 * to ctx->raw_edid through specific ioctl. 352 */ 353 if (!ctx->raw_edid) { 354 DRM_DEBUG_KMS("raw_edid is null.\n"); 355 return -EFAULT; 356 } 357 358 edid_len = (1 + ctx->raw_edid->extensions) * EDID_LENGTH; 359 edid = kmemdup(ctx->raw_edid, edid_len, GFP_KERNEL); 360 if (!edid) { 361 DRM_DEBUG_KMS("failed to allocate edid\n"); 362 return -ENOMEM; 363 } 364 365 drm_mode_connector_update_edid_property(connector, edid); 366 367 return drm_add_edid_modes(connector, edid); 368 } 369 370 static struct drm_encoder *vidi_best_encoder(struct drm_connector *connector) 371 { 372 struct vidi_context *ctx = ctx_from_connector(connector); 373 374 return &ctx->encoder; 375 } 376 377 static struct drm_connector_helper_funcs vidi_connector_helper_funcs = { 378 .get_modes = vidi_get_modes, 379 .best_encoder = vidi_best_encoder, 380 }; 381 382 static int vidi_create_connector(struct drm_encoder *encoder) 383 { 384 struct vidi_context *ctx = encoder_to_vidi(encoder); 385 struct drm_connector *connector = &ctx->connector; 386 int ret; 387 388 connector->polled = DRM_CONNECTOR_POLL_HPD; 389 390 ret = drm_connector_init(ctx->drm_dev, connector, 391 &vidi_connector_funcs, DRM_MODE_CONNECTOR_VIRTUAL); 392 if (ret) { 393 DRM_ERROR("Failed to initialize connector with drm\n"); 394 return ret; 395 } 396 397 drm_connector_helper_add(connector, &vidi_connector_helper_funcs); 398 drm_connector_register(connector); 399 drm_mode_connector_attach_encoder(connector, encoder); 400 401 return 0; 402 } 403 404 static bool exynos_vidi_mode_fixup(struct drm_encoder *encoder, 405 const struct drm_display_mode *mode, 406 struct drm_display_mode *adjusted_mode) 407 { 408 return true; 409 } 410 411 static void exynos_vidi_mode_set(struct drm_encoder *encoder, 412 struct drm_display_mode *mode, 413 struct drm_display_mode *adjusted_mode) 414 { 415 } 416 417 static void exynos_vidi_enable(struct drm_encoder *encoder) 418 { 419 } 420 421 static void exynos_vidi_disable(struct drm_encoder *encoder) 422 { 423 } 424 425 static struct drm_encoder_helper_funcs exynos_vidi_encoder_helper_funcs = { 426 .mode_fixup = exynos_vidi_mode_fixup, 427 .mode_set = exynos_vidi_mode_set, 428 .enable = exynos_vidi_enable, 429 .disable = exynos_vidi_disable, 430 }; 431 432 static struct drm_encoder_funcs exynos_vidi_encoder_funcs = { 433 .destroy = drm_encoder_cleanup, 434 }; 435 436 static int vidi_bind(struct device *dev, struct device *master, void *data) 437 { 438 struct vidi_context *ctx = dev_get_drvdata(dev); 439 struct drm_device *drm_dev = data; 440 struct drm_encoder *encoder = &ctx->encoder; 441 struct exynos_drm_plane *exynos_plane; 442 enum drm_plane_type type; 443 unsigned int zpos; 444 int pipe, ret; 445 446 vidi_ctx_initialize(ctx, drm_dev); 447 448 for (zpos = 0; zpos < WINDOWS_NR; zpos++) { 449 type = exynos_plane_get_type(zpos, CURSOR_WIN); 450 ret = exynos_plane_init(drm_dev, &ctx->planes[zpos], 451 1 << ctx->pipe, type, formats, 452 ARRAY_SIZE(formats), zpos); 453 if (ret) 454 return ret; 455 } 456 457 exynos_plane = &ctx->planes[DEFAULT_WIN]; 458 ctx->crtc = exynos_drm_crtc_create(drm_dev, &exynos_plane->base, 459 ctx->pipe, EXYNOS_DISPLAY_TYPE_VIDI, 460 &vidi_crtc_ops, ctx); 461 if (IS_ERR(ctx->crtc)) { 462 DRM_ERROR("failed to create crtc.\n"); 463 return PTR_ERR(ctx->crtc); 464 } 465 466 pipe = exynos_drm_crtc_get_pipe_from_type(drm_dev, 467 EXYNOS_DISPLAY_TYPE_VIDI); 468 if (pipe < 0) 469 return pipe; 470 471 encoder->possible_crtcs = 1 << pipe; 472 473 DRM_DEBUG_KMS("possible_crtcs = 0x%x\n", encoder->possible_crtcs); 474 475 drm_encoder_init(drm_dev, encoder, &exynos_vidi_encoder_funcs, 476 DRM_MODE_ENCODER_TMDS); 477 478 drm_encoder_helper_add(encoder, &exynos_vidi_encoder_helper_funcs); 479 480 ret = vidi_create_connector(encoder); 481 if (ret) { 482 DRM_ERROR("failed to create connector ret = %d\n", ret); 483 drm_encoder_cleanup(encoder); 484 return ret; 485 } 486 487 return 0; 488 } 489 490 491 static void vidi_unbind(struct device *dev, struct device *master, void *data) 492 { 493 } 494 495 static const struct component_ops vidi_component_ops = { 496 .bind = vidi_bind, 497 .unbind = vidi_unbind, 498 }; 499 500 static int vidi_probe(struct platform_device *pdev) 501 { 502 struct vidi_context *ctx; 503 int ret; 504 505 ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL); 506 if (!ctx) 507 return -ENOMEM; 508 509 ctx->pdev = pdev; 510 511 INIT_WORK(&ctx->work, vidi_fake_vblank_handler); 512 513 mutex_init(&ctx->lock); 514 515 platform_set_drvdata(pdev, ctx); 516 517 ret = device_create_file(&pdev->dev, &dev_attr_connection); 518 if (ret < 0) { 519 DRM_ERROR("failed to create connection sysfs.\n"); 520 return ret; 521 } 522 523 ret = component_add(&pdev->dev, &vidi_component_ops); 524 if (ret) 525 goto err_remove_file; 526 527 return ret; 528 529 err_remove_file: 530 device_remove_file(&pdev->dev, &dev_attr_connection); 531 532 return ret; 533 } 534 535 static int vidi_remove(struct platform_device *pdev) 536 { 537 struct vidi_context *ctx = platform_get_drvdata(pdev); 538 539 if (ctx->raw_edid != (struct edid *)fake_edid_info) { 540 kfree(ctx->raw_edid); 541 ctx->raw_edid = NULL; 542 543 return -EINVAL; 544 } 545 546 component_del(&pdev->dev, &vidi_component_ops); 547 548 return 0; 549 } 550 551 struct platform_driver vidi_driver = { 552 .probe = vidi_probe, 553 .remove = vidi_remove, 554 .driver = { 555 .name = "exynos-drm-vidi", 556 .owner = THIS_MODULE, 557 }, 558 }; 559