1 /* exynos_drm_crtc.c 2 * 3 * Copyright (c) 2011 Samsung Electronics Co., Ltd. 4 * Authors: 5 * Inki Dae <inki.dae@samsung.com> 6 * Joonyoung Shim <jy0922.shim@samsung.com> 7 * Seung-Woo Kim <sw0312.kim@samsung.com> 8 * 9 * This program is free software; you can redistribute it and/or modify it 10 * under the terms of the GNU General Public License as published by the 11 * Free Software Foundation; either version 2 of the License, or (at your 12 * option) any later version. 13 */ 14 15 #include <drm/drmP.h> 16 #include <drm/drm_crtc_helper.h> 17 18 #include "exynos_drm_crtc.h" 19 #include "exynos_drm_drv.h" 20 #include "exynos_drm_encoder.h" 21 #include "exynos_drm_plane.h" 22 23 #define to_exynos_crtc(x) container_of(x, struct exynos_drm_crtc,\ 24 drm_crtc) 25 26 enum exynos_crtc_mode { 27 CRTC_MODE_NORMAL, /* normal mode */ 28 CRTC_MODE_BLANK, /* The private plane of crtc is blank */ 29 }; 30 31 /* 32 * Exynos specific crtc structure. 33 * 34 * @drm_crtc: crtc object. 35 * @manager: the manager associated with this crtc 36 * @pipe: a crtc index created at load() with a new crtc object creation 37 * and the crtc object would be set to private->crtc array 38 * to get a crtc object corresponding to this pipe from private->crtc 39 * array when irq interrupt occurred. the reason of using this pipe is that 40 * drm framework doesn't support multiple irq yet. 41 * we can refer to the crtc to current hardware interrupt occurred through 42 * this pipe value. 43 * @dpms: store the crtc dpms value 44 * @mode: store the crtc mode value 45 */ 46 struct exynos_drm_crtc { 47 struct drm_crtc drm_crtc; 48 struct exynos_drm_manager *manager; 49 unsigned int pipe; 50 unsigned int dpms; 51 enum exynos_crtc_mode mode; 52 wait_queue_head_t pending_flip_queue; 53 atomic_t pending_flip; 54 }; 55 56 static void exynos_drm_crtc_dpms(struct drm_crtc *crtc, int mode) 57 { 58 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 59 struct exynos_drm_manager *manager = exynos_crtc->manager; 60 61 DRM_DEBUG_KMS("crtc[%d] mode[%d]\n", crtc->base.id, mode); 62 63 if (exynos_crtc->dpms == mode) { 64 DRM_DEBUG_KMS("desired dpms mode is same as previous one.\n"); 65 return; 66 } 67 68 if (mode > DRM_MODE_DPMS_ON) { 69 /* wait for the completion of page flip. */ 70 if (!wait_event_timeout(exynos_crtc->pending_flip_queue, 71 !atomic_read(&exynos_crtc->pending_flip), 72 HZ/20)) 73 atomic_set(&exynos_crtc->pending_flip, 0); 74 drm_vblank_off(crtc->dev, exynos_crtc->pipe); 75 } 76 77 if (manager->ops->dpms) 78 manager->ops->dpms(manager, mode); 79 80 exynos_crtc->dpms = mode; 81 } 82 83 static void exynos_drm_crtc_prepare(struct drm_crtc *crtc) 84 { 85 /* drm framework doesn't check NULL. */ 86 } 87 88 static void exynos_drm_crtc_commit(struct drm_crtc *crtc) 89 { 90 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 91 struct exynos_drm_manager *manager = exynos_crtc->manager; 92 93 exynos_drm_crtc_dpms(crtc, DRM_MODE_DPMS_ON); 94 95 exynos_plane_commit(crtc->primary); 96 97 if (manager->ops->commit) 98 manager->ops->commit(manager); 99 100 exynos_plane_dpms(crtc->primary, DRM_MODE_DPMS_ON); 101 } 102 103 static bool 104 exynos_drm_crtc_mode_fixup(struct drm_crtc *crtc, 105 const struct drm_display_mode *mode, 106 struct drm_display_mode *adjusted_mode) 107 { 108 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 109 struct exynos_drm_manager *manager = exynos_crtc->manager; 110 111 if (manager->ops->mode_fixup) 112 return manager->ops->mode_fixup(manager, mode, adjusted_mode); 113 114 return true; 115 } 116 117 static int 118 exynos_drm_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode, 119 struct drm_display_mode *adjusted_mode, int x, int y, 120 struct drm_framebuffer *old_fb) 121 { 122 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 123 struct exynos_drm_manager *manager = exynos_crtc->manager; 124 struct drm_framebuffer *fb = crtc->primary->fb; 125 unsigned int crtc_w; 126 unsigned int crtc_h; 127 128 /* 129 * copy the mode data adjusted by mode_fixup() into crtc->mode 130 * so that hardware can be seet to proper mode. 131 */ 132 memcpy(&crtc->mode, adjusted_mode, sizeof(*adjusted_mode)); 133 134 crtc_w = fb->width - x; 135 crtc_h = fb->height - y; 136 137 if (manager->ops->mode_set) 138 manager->ops->mode_set(manager, &crtc->mode); 139 140 return exynos_plane_mode_set(crtc->primary, crtc, fb, 0, 0, 141 crtc_w, crtc_h, x, y, crtc_w, crtc_h); 142 } 143 144 static int exynos_drm_crtc_mode_set_commit(struct drm_crtc *crtc, int x, int y, 145 struct drm_framebuffer *old_fb) 146 { 147 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 148 struct drm_framebuffer *fb = crtc->primary->fb; 149 unsigned int crtc_w; 150 unsigned int crtc_h; 151 int ret; 152 153 /* when framebuffer changing is requested, crtc's dpms should be on */ 154 if (exynos_crtc->dpms > DRM_MODE_DPMS_ON) { 155 DRM_ERROR("failed framebuffer changing request.\n"); 156 return -EPERM; 157 } 158 159 crtc_w = fb->width - x; 160 crtc_h = fb->height - y; 161 162 ret = exynos_plane_mode_set(crtc->primary, crtc, fb, 0, 0, 163 crtc_w, crtc_h, x, y, crtc_w, crtc_h); 164 if (ret) 165 return ret; 166 167 exynos_drm_crtc_commit(crtc); 168 169 return 0; 170 } 171 172 static int exynos_drm_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y, 173 struct drm_framebuffer *old_fb) 174 { 175 return exynos_drm_crtc_mode_set_commit(crtc, x, y, old_fb); 176 } 177 178 static void exynos_drm_crtc_disable(struct drm_crtc *crtc) 179 { 180 struct drm_plane *plane; 181 int ret; 182 183 exynos_drm_crtc_dpms(crtc, DRM_MODE_DPMS_OFF); 184 185 drm_for_each_legacy_plane(plane, &crtc->dev->mode_config.plane_list) { 186 if (plane->crtc != crtc) 187 continue; 188 189 ret = plane->funcs->disable_plane(plane); 190 if (ret) 191 DRM_ERROR("Failed to disable plane %d\n", ret); 192 } 193 } 194 195 static struct drm_crtc_helper_funcs exynos_crtc_helper_funcs = { 196 .dpms = exynos_drm_crtc_dpms, 197 .prepare = exynos_drm_crtc_prepare, 198 .commit = exynos_drm_crtc_commit, 199 .mode_fixup = exynos_drm_crtc_mode_fixup, 200 .mode_set = exynos_drm_crtc_mode_set, 201 .mode_set_base = exynos_drm_crtc_mode_set_base, 202 .disable = exynos_drm_crtc_disable, 203 }; 204 205 static int exynos_drm_crtc_page_flip(struct drm_crtc *crtc, 206 struct drm_framebuffer *fb, 207 struct drm_pending_vblank_event *event, 208 uint32_t page_flip_flags) 209 { 210 struct drm_device *dev = crtc->dev; 211 struct exynos_drm_private *dev_priv = dev->dev_private; 212 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 213 struct drm_framebuffer *old_fb = crtc->primary->fb; 214 int ret = -EINVAL; 215 216 /* when the page flip is requested, crtc's dpms should be on */ 217 if (exynos_crtc->dpms > DRM_MODE_DPMS_ON) { 218 DRM_ERROR("failed page flip request.\n"); 219 return -EINVAL; 220 } 221 222 mutex_lock(&dev->struct_mutex); 223 224 if (event) { 225 /* 226 * the pipe from user always is 0 so we can set pipe number 227 * of current owner to event. 228 */ 229 event->pipe = exynos_crtc->pipe; 230 231 ret = drm_vblank_get(dev, exynos_crtc->pipe); 232 if (ret) { 233 DRM_DEBUG("failed to acquire vblank counter\n"); 234 235 goto out; 236 } 237 238 spin_lock_irq(&dev->event_lock); 239 list_add_tail(&event->base.link, 240 &dev_priv->pageflip_event_list); 241 atomic_set(&exynos_crtc->pending_flip, 1); 242 spin_unlock_irq(&dev->event_lock); 243 244 crtc->primary->fb = fb; 245 ret = exynos_drm_crtc_mode_set_commit(crtc, crtc->x, crtc->y, 246 NULL); 247 if (ret) { 248 crtc->primary->fb = old_fb; 249 250 spin_lock_irq(&dev->event_lock); 251 drm_vblank_put(dev, exynos_crtc->pipe); 252 list_del(&event->base.link); 253 atomic_set(&exynos_crtc->pending_flip, 0); 254 spin_unlock_irq(&dev->event_lock); 255 256 goto out; 257 } 258 } 259 out: 260 mutex_unlock(&dev->struct_mutex); 261 return ret; 262 } 263 264 static void exynos_drm_crtc_destroy(struct drm_crtc *crtc) 265 { 266 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 267 struct exynos_drm_private *private = crtc->dev->dev_private; 268 269 private->crtc[exynos_crtc->pipe] = NULL; 270 271 drm_crtc_cleanup(crtc); 272 kfree(exynos_crtc); 273 } 274 275 static int exynos_drm_crtc_set_property(struct drm_crtc *crtc, 276 struct drm_property *property, 277 uint64_t val) 278 { 279 struct drm_device *dev = crtc->dev; 280 struct exynos_drm_private *dev_priv = dev->dev_private; 281 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 282 283 if (property == dev_priv->crtc_mode_property) { 284 enum exynos_crtc_mode mode = val; 285 286 if (mode == exynos_crtc->mode) 287 return 0; 288 289 exynos_crtc->mode = mode; 290 291 switch (mode) { 292 case CRTC_MODE_NORMAL: 293 exynos_drm_crtc_commit(crtc); 294 break; 295 case CRTC_MODE_BLANK: 296 exynos_plane_dpms(crtc->primary, DRM_MODE_DPMS_OFF); 297 break; 298 default: 299 break; 300 } 301 302 return 0; 303 } 304 305 return -EINVAL; 306 } 307 308 static struct drm_crtc_funcs exynos_crtc_funcs = { 309 .set_config = drm_crtc_helper_set_config, 310 .page_flip = exynos_drm_crtc_page_flip, 311 .destroy = exynos_drm_crtc_destroy, 312 .set_property = exynos_drm_crtc_set_property, 313 }; 314 315 static const struct drm_prop_enum_list mode_names[] = { 316 { CRTC_MODE_NORMAL, "normal" }, 317 { CRTC_MODE_BLANK, "blank" }, 318 }; 319 320 static void exynos_drm_crtc_attach_mode_property(struct drm_crtc *crtc) 321 { 322 struct drm_device *dev = crtc->dev; 323 struct exynos_drm_private *dev_priv = dev->dev_private; 324 struct drm_property *prop; 325 326 prop = dev_priv->crtc_mode_property; 327 if (!prop) { 328 prop = drm_property_create_enum(dev, 0, "mode", mode_names, 329 ARRAY_SIZE(mode_names)); 330 if (!prop) 331 return; 332 333 dev_priv->crtc_mode_property = prop; 334 } 335 336 drm_object_attach_property(&crtc->base, prop, 0); 337 } 338 339 int exynos_drm_crtc_create(struct exynos_drm_manager *manager) 340 { 341 struct exynos_drm_crtc *exynos_crtc; 342 struct drm_plane *plane; 343 struct exynos_drm_private *private = manager->drm_dev->dev_private; 344 struct drm_crtc *crtc; 345 int ret; 346 347 exynos_crtc = kzalloc(sizeof(*exynos_crtc), GFP_KERNEL); 348 if (!exynos_crtc) 349 return -ENOMEM; 350 351 init_waitqueue_head(&exynos_crtc->pending_flip_queue); 352 atomic_set(&exynos_crtc->pending_flip, 0); 353 354 exynos_crtc->dpms = DRM_MODE_DPMS_OFF; 355 exynos_crtc->manager = manager; 356 exynos_crtc->pipe = manager->pipe; 357 plane = exynos_plane_init(manager->drm_dev, 1 << manager->pipe, 358 DRM_PLANE_TYPE_PRIMARY); 359 if (IS_ERR(plane)) { 360 ret = PTR_ERR(plane); 361 goto err_plane; 362 } 363 364 manager->crtc = &exynos_crtc->drm_crtc; 365 crtc = &exynos_crtc->drm_crtc; 366 367 private->crtc[manager->pipe] = crtc; 368 369 ret = drm_crtc_init_with_planes(manager->drm_dev, crtc, plane, NULL, 370 &exynos_crtc_funcs); 371 if (ret < 0) 372 goto err_crtc; 373 374 drm_crtc_helper_add(crtc, &exynos_crtc_helper_funcs); 375 376 exynos_drm_crtc_attach_mode_property(crtc); 377 378 return 0; 379 380 err_crtc: 381 plane->funcs->destroy(plane); 382 err_plane: 383 kfree(exynos_crtc); 384 return ret; 385 } 386 387 int exynos_drm_crtc_enable_vblank(struct drm_device *dev, int pipe) 388 { 389 struct exynos_drm_private *private = dev->dev_private; 390 struct exynos_drm_crtc *exynos_crtc = 391 to_exynos_crtc(private->crtc[pipe]); 392 struct exynos_drm_manager *manager = exynos_crtc->manager; 393 394 if (exynos_crtc->dpms != DRM_MODE_DPMS_ON) 395 return -EPERM; 396 397 if (manager->ops->enable_vblank) 398 manager->ops->enable_vblank(manager); 399 400 return 0; 401 } 402 403 void exynos_drm_crtc_disable_vblank(struct drm_device *dev, int pipe) 404 { 405 struct exynos_drm_private *private = dev->dev_private; 406 struct exynos_drm_crtc *exynos_crtc = 407 to_exynos_crtc(private->crtc[pipe]); 408 struct exynos_drm_manager *manager = exynos_crtc->manager; 409 410 if (exynos_crtc->dpms != DRM_MODE_DPMS_ON) 411 return; 412 413 if (manager->ops->disable_vblank) 414 manager->ops->disable_vblank(manager); 415 } 416 417 void exynos_drm_crtc_finish_pageflip(struct drm_device *dev, int pipe) 418 { 419 struct exynos_drm_private *dev_priv = dev->dev_private; 420 struct drm_pending_vblank_event *e, *t; 421 struct drm_crtc *drm_crtc = dev_priv->crtc[pipe]; 422 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(drm_crtc); 423 unsigned long flags; 424 425 spin_lock_irqsave(&dev->event_lock, flags); 426 427 list_for_each_entry_safe(e, t, &dev_priv->pageflip_event_list, 428 base.link) { 429 /* if event's pipe isn't same as crtc then ignore it. */ 430 if (pipe != e->pipe) 431 continue; 432 433 list_del(&e->base.link); 434 drm_send_vblank_event(dev, -1, e); 435 drm_vblank_put(dev, pipe); 436 atomic_set(&exynos_crtc->pending_flip, 0); 437 wake_up(&exynos_crtc->pending_flip_queue); 438 } 439 440 spin_unlock_irqrestore(&dev->event_lock, flags); 441 } 442 443 void exynos_drm_crtc_plane_mode_set(struct drm_crtc *crtc, 444 struct exynos_drm_overlay *overlay) 445 { 446 struct exynos_drm_manager *manager = to_exynos_crtc(crtc)->manager; 447 448 if (manager->ops->win_mode_set) 449 manager->ops->win_mode_set(manager, overlay); 450 } 451 452 void exynos_drm_crtc_plane_commit(struct drm_crtc *crtc, int zpos) 453 { 454 struct exynos_drm_manager *manager = to_exynos_crtc(crtc)->manager; 455 456 if (manager->ops->win_commit) 457 manager->ops->win_commit(manager, zpos); 458 } 459 460 void exynos_drm_crtc_plane_enable(struct drm_crtc *crtc, int zpos) 461 { 462 struct exynos_drm_manager *manager = to_exynos_crtc(crtc)->manager; 463 464 if (manager->ops->win_enable) 465 manager->ops->win_enable(manager, zpos); 466 } 467 468 void exynos_drm_crtc_plane_disable(struct drm_crtc *crtc, int zpos) 469 { 470 struct exynos_drm_manager *manager = to_exynos_crtc(crtc)->manager; 471 472 if (manager->ops->win_disable) 473 manager->ops->win_disable(manager, zpos); 474 } 475 476 void exynos_drm_crtc_complete_scanout(struct drm_framebuffer *fb) 477 { 478 struct exynos_drm_manager *manager; 479 struct drm_device *dev = fb->dev; 480 struct drm_crtc *crtc; 481 482 /* 483 * make sure that overlay data are updated to real hardware 484 * for all encoders. 485 */ 486 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { 487 manager = to_exynos_crtc(crtc)->manager; 488 489 /* 490 * wait for vblank interrupt 491 * - this makes sure that overlay data are updated to 492 * real hardware. 493 */ 494 if (manager->ops->wait_for_vblank) 495 manager->ops->wait_for_vblank(manager); 496 } 497 } 498 499 int exynos_drm_crtc_get_pipe_from_type(struct drm_device *drm_dev, 500 unsigned int out_type) 501 { 502 struct drm_crtc *crtc; 503 504 list_for_each_entry(crtc, &drm_dev->mode_config.crtc_list, head) { 505 struct exynos_drm_crtc *exynos_crtc; 506 507 exynos_crtc = to_exynos_crtc(crtc); 508 if (exynos_crtc->manager->type == out_type) 509 return exynos_crtc->manager->pipe; 510 } 511 512 return -EPERM; 513 } 514 515 void exynos_drm_crtc_te_handler(struct drm_crtc *crtc) 516 { 517 struct exynos_drm_manager *manager = to_exynos_crtc(crtc)->manager; 518 519 if (manager->ops->te_handler) 520 manager->ops->te_handler(manager); 521 } 522