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 * @drm_plane: pointer of private plane object for this crtc 36 * @manager: the manager associated with this crtc 37 * @pipe: a crtc index created at load() with a new crtc object creation 38 * and the crtc object would be set to private->crtc array 39 * to get a crtc object corresponding to this pipe from private->crtc 40 * array when irq interrupt occurred. the reason of using this pipe is that 41 * drm framework doesn't support multiple irq yet. 42 * we can refer to the crtc to current hardware interrupt occurred through 43 * this pipe value. 44 * @dpms: store the crtc dpms value 45 * @mode: store the crtc mode value 46 */ 47 struct exynos_drm_crtc { 48 struct drm_crtc drm_crtc; 49 struct drm_plane *plane; 50 struct exynos_drm_manager *manager; 51 unsigned int pipe; 52 unsigned int dpms; 53 enum exynos_crtc_mode mode; 54 wait_queue_head_t pending_flip_queue; 55 atomic_t pending_flip; 56 }; 57 58 static void exynos_drm_crtc_dpms(struct drm_crtc *crtc, int mode) 59 { 60 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 61 struct exynos_drm_manager *manager = exynos_crtc->manager; 62 63 DRM_DEBUG_KMS("crtc[%d] mode[%d]\n", crtc->base.id, mode); 64 65 if (exynos_crtc->dpms == mode) { 66 DRM_DEBUG_KMS("desired dpms mode is same as previous one.\n"); 67 return; 68 } 69 70 if (mode > DRM_MODE_DPMS_ON) { 71 /* wait for the completion of page flip. */ 72 wait_event(exynos_crtc->pending_flip_queue, 73 atomic_read(&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(exynos_crtc->plane); 96 97 if (manager->ops->commit) 98 manager->ops->commit(manager); 99 100 exynos_plane_dpms(exynos_crtc->plane, 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_plane *plane = exynos_crtc->plane; 125 unsigned int crtc_w; 126 unsigned int crtc_h; 127 int ret; 128 129 /* 130 * copy the mode data adjusted by mode_fixup() into crtc->mode 131 * so that hardware can be seet to proper mode. 132 */ 133 memcpy(&crtc->mode, adjusted_mode, sizeof(*adjusted_mode)); 134 135 crtc_w = crtc->primary->fb->width - x; 136 crtc_h = crtc->primary->fb->height - y; 137 138 if (manager->ops->mode_set) 139 manager->ops->mode_set(manager, &crtc->mode); 140 141 ret = exynos_plane_mode_set(plane, crtc, crtc->primary->fb, 0, 0, crtc_w, crtc_h, 142 x, y, crtc_w, crtc_h); 143 if (ret) 144 return ret; 145 146 plane->crtc = crtc; 147 plane->fb = crtc->primary->fb; 148 149 return 0; 150 } 151 152 static int exynos_drm_crtc_mode_set_commit(struct drm_crtc *crtc, int x, int y, 153 struct drm_framebuffer *old_fb) 154 { 155 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 156 struct drm_plane *plane = exynos_crtc->plane; 157 unsigned int crtc_w; 158 unsigned int crtc_h; 159 int ret; 160 161 /* when framebuffer changing is requested, crtc's dpms should be on */ 162 if (exynos_crtc->dpms > DRM_MODE_DPMS_ON) { 163 DRM_ERROR("failed framebuffer changing request.\n"); 164 return -EPERM; 165 } 166 167 crtc_w = crtc->primary->fb->width - x; 168 crtc_h = crtc->primary->fb->height - y; 169 170 ret = exynos_plane_mode_set(plane, crtc, crtc->primary->fb, 0, 0, crtc_w, crtc_h, 171 x, y, crtc_w, crtc_h); 172 if (ret) 173 return ret; 174 175 exynos_drm_crtc_commit(crtc); 176 177 return 0; 178 } 179 180 static int exynos_drm_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y, 181 struct drm_framebuffer *old_fb) 182 { 183 return exynos_drm_crtc_mode_set_commit(crtc, x, y, old_fb); 184 } 185 186 static void exynos_drm_crtc_disable(struct drm_crtc *crtc) 187 { 188 struct drm_plane *plane; 189 int ret; 190 191 exynos_drm_crtc_dpms(crtc, DRM_MODE_DPMS_OFF); 192 193 drm_for_each_legacy_plane(plane, &crtc->dev->mode_config.plane_list) { 194 if (plane->crtc != crtc) 195 continue; 196 197 ret = plane->funcs->disable_plane(plane); 198 if (ret) 199 DRM_ERROR("Failed to disable plane %d\n", ret); 200 } 201 } 202 203 static struct drm_crtc_helper_funcs exynos_crtc_helper_funcs = { 204 .dpms = exynos_drm_crtc_dpms, 205 .prepare = exynos_drm_crtc_prepare, 206 .commit = exynos_drm_crtc_commit, 207 .mode_fixup = exynos_drm_crtc_mode_fixup, 208 .mode_set = exynos_drm_crtc_mode_set, 209 .mode_set_base = exynos_drm_crtc_mode_set_base, 210 .disable = exynos_drm_crtc_disable, 211 }; 212 213 static int exynos_drm_crtc_page_flip(struct drm_crtc *crtc, 214 struct drm_framebuffer *fb, 215 struct drm_pending_vblank_event *event, 216 uint32_t page_flip_flags) 217 { 218 struct drm_device *dev = crtc->dev; 219 struct exynos_drm_private *dev_priv = dev->dev_private; 220 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 221 struct drm_framebuffer *old_fb = crtc->primary->fb; 222 int ret = -EINVAL; 223 224 /* when the page flip is requested, crtc's dpms should be on */ 225 if (exynos_crtc->dpms > DRM_MODE_DPMS_ON) { 226 DRM_ERROR("failed page flip request.\n"); 227 return -EINVAL; 228 } 229 230 mutex_lock(&dev->struct_mutex); 231 232 if (event) { 233 /* 234 * the pipe from user always is 0 so we can set pipe number 235 * of current owner to event. 236 */ 237 event->pipe = exynos_crtc->pipe; 238 239 ret = drm_vblank_get(dev, exynos_crtc->pipe); 240 if (ret) { 241 DRM_DEBUG("failed to acquire vblank counter\n"); 242 243 goto out; 244 } 245 246 spin_lock_irq(&dev->event_lock); 247 list_add_tail(&event->base.link, 248 &dev_priv->pageflip_event_list); 249 atomic_set(&exynos_crtc->pending_flip, 1); 250 spin_unlock_irq(&dev->event_lock); 251 252 crtc->primary->fb = fb; 253 ret = exynos_drm_crtc_mode_set_commit(crtc, crtc->x, crtc->y, 254 NULL); 255 if (ret) { 256 crtc->primary->fb = old_fb; 257 258 spin_lock_irq(&dev->event_lock); 259 drm_vblank_put(dev, exynos_crtc->pipe); 260 list_del(&event->base.link); 261 spin_unlock_irq(&dev->event_lock); 262 263 goto out; 264 } 265 } 266 out: 267 mutex_unlock(&dev->struct_mutex); 268 return ret; 269 } 270 271 static void exynos_drm_crtc_destroy(struct drm_crtc *crtc) 272 { 273 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 274 struct exynos_drm_private *private = crtc->dev->dev_private; 275 276 private->crtc[exynos_crtc->pipe] = NULL; 277 278 drm_crtc_cleanup(crtc); 279 kfree(exynos_crtc); 280 } 281 282 static int exynos_drm_crtc_set_property(struct drm_crtc *crtc, 283 struct drm_property *property, 284 uint64_t val) 285 { 286 struct drm_device *dev = crtc->dev; 287 struct exynos_drm_private *dev_priv = dev->dev_private; 288 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 289 290 if (property == dev_priv->crtc_mode_property) { 291 enum exynos_crtc_mode mode = val; 292 293 if (mode == exynos_crtc->mode) 294 return 0; 295 296 exynos_crtc->mode = mode; 297 298 switch (mode) { 299 case CRTC_MODE_NORMAL: 300 exynos_drm_crtc_commit(crtc); 301 break; 302 case CRTC_MODE_BLANK: 303 exynos_plane_dpms(exynos_crtc->plane, 304 DRM_MODE_DPMS_OFF); 305 break; 306 default: 307 break; 308 } 309 310 return 0; 311 } 312 313 return -EINVAL; 314 } 315 316 static struct drm_crtc_funcs exynos_crtc_funcs = { 317 .set_config = drm_crtc_helper_set_config, 318 .page_flip = exynos_drm_crtc_page_flip, 319 .destroy = exynos_drm_crtc_destroy, 320 .set_property = exynos_drm_crtc_set_property, 321 }; 322 323 static const struct drm_prop_enum_list mode_names[] = { 324 { CRTC_MODE_NORMAL, "normal" }, 325 { CRTC_MODE_BLANK, "blank" }, 326 }; 327 328 static void exynos_drm_crtc_attach_mode_property(struct drm_crtc *crtc) 329 { 330 struct drm_device *dev = crtc->dev; 331 struct exynos_drm_private *dev_priv = dev->dev_private; 332 struct drm_property *prop; 333 334 prop = dev_priv->crtc_mode_property; 335 if (!prop) { 336 prop = drm_property_create_enum(dev, 0, "mode", mode_names, 337 ARRAY_SIZE(mode_names)); 338 if (!prop) 339 return; 340 341 dev_priv->crtc_mode_property = prop; 342 } 343 344 drm_object_attach_property(&crtc->base, prop, 0); 345 } 346 347 int exynos_drm_crtc_create(struct exynos_drm_manager *manager) 348 { 349 struct exynos_drm_crtc *exynos_crtc; 350 struct exynos_drm_private *private = manager->drm_dev->dev_private; 351 struct drm_crtc *crtc; 352 353 exynos_crtc = kzalloc(sizeof(*exynos_crtc), GFP_KERNEL); 354 if (!exynos_crtc) 355 return -ENOMEM; 356 357 init_waitqueue_head(&exynos_crtc->pending_flip_queue); 358 atomic_set(&exynos_crtc->pending_flip, 0); 359 360 exynos_crtc->dpms = DRM_MODE_DPMS_OFF; 361 exynos_crtc->manager = manager; 362 exynos_crtc->pipe = manager->pipe; 363 exynos_crtc->plane = exynos_plane_init(manager->drm_dev, 364 1 << manager->pipe, true); 365 if (!exynos_crtc->plane) { 366 kfree(exynos_crtc); 367 return -ENOMEM; 368 } 369 370 crtc = &exynos_crtc->drm_crtc; 371 372 private->crtc[manager->pipe] = crtc; 373 374 drm_crtc_init(manager->drm_dev, crtc, &exynos_crtc_funcs); 375 drm_crtc_helper_add(crtc, &exynos_crtc_helper_funcs); 376 377 exynos_drm_crtc_attach_mode_property(crtc); 378 379 return 0; 380 } 381 382 int exynos_drm_crtc_enable_vblank(struct drm_device *dev, int pipe) 383 { 384 struct exynos_drm_private *private = dev->dev_private; 385 struct exynos_drm_crtc *exynos_crtc = 386 to_exynos_crtc(private->crtc[pipe]); 387 struct exynos_drm_manager *manager = exynos_crtc->manager; 388 389 if (exynos_crtc->dpms != DRM_MODE_DPMS_ON) 390 return -EPERM; 391 392 if (manager->ops->enable_vblank) 393 manager->ops->enable_vblank(manager); 394 395 return 0; 396 } 397 398 void exynos_drm_crtc_disable_vblank(struct drm_device *dev, int pipe) 399 { 400 struct exynos_drm_private *private = dev->dev_private; 401 struct exynos_drm_crtc *exynos_crtc = 402 to_exynos_crtc(private->crtc[pipe]); 403 struct exynos_drm_manager *manager = exynos_crtc->manager; 404 405 if (exynos_crtc->dpms != DRM_MODE_DPMS_ON) 406 return; 407 408 if (manager->ops->disable_vblank) 409 manager->ops->disable_vblank(manager); 410 } 411 412 void exynos_drm_crtc_finish_pageflip(struct drm_device *dev, int pipe) 413 { 414 struct exynos_drm_private *dev_priv = dev->dev_private; 415 struct drm_pending_vblank_event *e, *t; 416 struct drm_crtc *drm_crtc = dev_priv->crtc[pipe]; 417 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(drm_crtc); 418 unsigned long flags; 419 420 spin_lock_irqsave(&dev->event_lock, flags); 421 422 list_for_each_entry_safe(e, t, &dev_priv->pageflip_event_list, 423 base.link) { 424 /* if event's pipe isn't same as crtc then ignore it. */ 425 if (pipe != e->pipe) 426 continue; 427 428 list_del(&e->base.link); 429 drm_send_vblank_event(dev, -1, e); 430 drm_vblank_put(dev, pipe); 431 atomic_set(&exynos_crtc->pending_flip, 0); 432 wake_up(&exynos_crtc->pending_flip_queue); 433 } 434 435 spin_unlock_irqrestore(&dev->event_lock, flags); 436 } 437 438 void exynos_drm_crtc_plane_mode_set(struct drm_crtc *crtc, 439 struct exynos_drm_overlay *overlay) 440 { 441 struct exynos_drm_manager *manager = to_exynos_crtc(crtc)->manager; 442 443 if (manager->ops->win_mode_set) 444 manager->ops->win_mode_set(manager, overlay); 445 } 446 447 void exynos_drm_crtc_plane_commit(struct drm_crtc *crtc, int zpos) 448 { 449 struct exynos_drm_manager *manager = to_exynos_crtc(crtc)->manager; 450 451 if (manager->ops->win_commit) 452 manager->ops->win_commit(manager, zpos); 453 } 454 455 void exynos_drm_crtc_plane_enable(struct drm_crtc *crtc, int zpos) 456 { 457 struct exynos_drm_manager *manager = to_exynos_crtc(crtc)->manager; 458 459 if (manager->ops->win_enable) 460 manager->ops->win_enable(manager, zpos); 461 } 462 463 void exynos_drm_crtc_plane_disable(struct drm_crtc *crtc, int zpos) 464 { 465 struct exynos_drm_manager *manager = to_exynos_crtc(crtc)->manager; 466 467 if (manager->ops->win_disable) 468 manager->ops->win_disable(manager, zpos); 469 } 470 471 void exynos_drm_crtc_complete_scanout(struct drm_framebuffer *fb) 472 { 473 struct exynos_drm_manager *manager; 474 struct drm_device *dev = fb->dev; 475 struct drm_crtc *crtc; 476 477 /* 478 * make sure that overlay data are updated to real hardware 479 * for all encoders. 480 */ 481 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { 482 manager = to_exynos_crtc(crtc)->manager; 483 484 /* 485 * wait for vblank interrupt 486 * - this makes sure that overlay data are updated to 487 * real hardware. 488 */ 489 if (manager->ops->wait_for_vblank) 490 manager->ops->wait_for_vblank(manager); 491 } 492 } 493