| 1 | /* |
| 2 | * Copyright (c) 2006-2008 Intel Corporation |
| 3 | * Copyright (c) 2007 Dave Airlie <airlied@linux.ie> |
| 4 | * Copyright (c) 2008 Red Hat Inc. |
| 5 | * |
| 6 | * DRM core CRTC related functions |
| 7 | * |
| 8 | * Permission to use, copy, modify, distribute, and sell this software and its |
| 9 | * documentation for any purpose is hereby granted without fee, provided that |
| 10 | * the above copyright notice appear in all copies and that both that copyright |
| 11 | * notice and this permission notice appear in supporting documentation, and |
| 12 | * that the name of the copyright holders not be used in advertising or |
| 13 | * publicity pertaining to distribution of the software without specific, |
| 14 | * written prior permission. The copyright holders make no representations |
| 15 | * about the suitability of this software for any purpose. It is provided "as |
| 16 | * is" without express or implied warranty. |
| 17 | * |
| 18 | * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, |
| 19 | * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO |
| 20 | * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR |
| 21 | * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, |
| 22 | * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER |
| 23 | * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE |
| 24 | * OF THIS SOFTWARE. |
| 25 | * |
| 26 | * Authors: |
| 27 | * Keith Packard |
| 28 | * Eric Anholt <eric@anholt.net> |
| 29 | * Dave Airlie <airlied@linux.ie> |
| 30 | * Jesse Barnes <jesse.barnes@intel.com> |
| 31 | */ |
| 32 | #include <linux/ctype.h> |
| 33 | #include <linux/list.h> |
| 34 | #include <linux/slab.h> |
| 35 | #include <linux/export.h> |
| 36 | #include <linux/dma-fence.h> |
| 37 | #include <drm/drmP.h> |
| 38 | #include <drm/drm_crtc.h> |
| 39 | #include <drm/drm_edid.h> |
| 40 | #include <drm/drm_fourcc.h> |
| 41 | #include <drm/drm_modeset_lock.h> |
| 42 | #include <drm/drm_atomic.h> |
| 43 | #include <drm/drm_auth.h> |
| 44 | #include <drm/drm_debugfs_crc.h> |
| 45 | |
| 46 | #include "drm_crtc_internal.h" |
| 47 | #include "drm_internal.h" |
| 48 | |
| 49 | /** |
| 50 | * DOC: overview |
| 51 | * |
| 52 | * A CRTC represents the overall display pipeline. It receives pixel data from |
| 53 | * &drm_plane and blends them together. The &drm_display_mode is also attached |
| 54 | * to the CRTC, specifying display timings. On the output side the data is fed |
| 55 | * to one or more &drm_encoder, which are then each connected to one |
| 56 | * &drm_connector. |
| 57 | * |
| 58 | * To create a CRTC, a KMS drivers allocates and zeroes an instances of |
| 59 | * &struct drm_crtc (possibly as part of a larger structure) and registers it |
| 60 | * with a call to drm_crtc_init_with_planes(). |
| 61 | * |
| 62 | * The CRTC is also the entry point for legacy modeset operations, see |
| 63 | * &drm_crtc_funcs.set_config, legacy plane operations, see |
| 64 | * &drm_crtc_funcs.page_flip and &drm_crtc_funcs.cursor_set2, and other legacy |
| 65 | * operations like &drm_crtc_funcs.gamma_set. For atomic drivers all these |
| 66 | * features are controlled through &drm_property and |
| 67 | * &drm_mode_config_funcs.atomic_check and &drm_mode_config_funcs.atomic_check. |
| 68 | */ |
| 69 | |
| 70 | /** |
| 71 | * drm_crtc_from_index - find the registered CRTC at an index |
| 72 | * @dev: DRM device |
| 73 | * @idx: index of registered CRTC to find for |
| 74 | * |
| 75 | * Given a CRTC index, return the registered CRTC from DRM device's |
| 76 | * list of CRTCs with matching index. This is the inverse of drm_crtc_index(). |
| 77 | * It's useful in the vblank callbacks (like &drm_driver.enable_vblank or |
| 78 | * &drm_driver.disable_vblank), since that still deals with indices instead |
| 79 | * of pointers to &struct drm_crtc." |
| 80 | */ |
| 81 | struct drm_crtc *drm_crtc_from_index(struct drm_device *dev, int idx) |
| 82 | { |
| 83 | struct drm_crtc *crtc; |
| 84 | |
| 85 | drm_for_each_crtc(crtc, dev) |
| 86 | if (idx == crtc->index) |
| 87 | return crtc; |
| 88 | |
| 89 | return NULL; |
| 90 | } |
| 91 | EXPORT_SYMBOL(drm_crtc_from_index); |
| 92 | |
| 93 | /** |
| 94 | * drm_crtc_force_disable - Forcibly turn off a CRTC |
| 95 | * @crtc: CRTC to turn off |
| 96 | * |
| 97 | * Note: This should only be used by non-atomic legacy drivers. |
| 98 | * |
| 99 | * Returns: |
| 100 | * Zero on success, error code on failure. |
| 101 | */ |
| 102 | int drm_crtc_force_disable(struct drm_crtc *crtc) |
| 103 | { |
| 104 | struct drm_mode_set set = { |
| 105 | .crtc = crtc, |
| 106 | }; |
| 107 | |
| 108 | WARN_ON(drm_drv_uses_atomic_modeset(crtc->dev)); |
| 109 | |
| 110 | return drm_mode_set_config_internal(&set); |
| 111 | } |
| 112 | EXPORT_SYMBOL(drm_crtc_force_disable); |
| 113 | |
| 114 | /** |
| 115 | * drm_crtc_force_disable_all - Forcibly turn off all enabled CRTCs |
| 116 | * @dev: DRM device whose CRTCs to turn off |
| 117 | * |
| 118 | * Drivers may want to call this on unload to ensure that all displays are |
| 119 | * unlit and the GPU is in a consistent, low power state. Takes modeset locks. |
| 120 | * |
| 121 | * Note: This should only be used by non-atomic legacy drivers. For an atomic |
| 122 | * version look at drm_atomic_helper_shutdown(). |
| 123 | * |
| 124 | * Returns: |
| 125 | * Zero on success, error code on failure. |
| 126 | */ |
| 127 | int drm_crtc_force_disable_all(struct drm_device *dev) |
| 128 | { |
| 129 | struct drm_crtc *crtc; |
| 130 | int ret = 0; |
| 131 | |
| 132 | drm_modeset_lock_all(dev); |
| 133 | drm_for_each_crtc(crtc, dev) |
| 134 | if (crtc->enabled) { |
| 135 | ret = drm_crtc_force_disable(crtc); |
| 136 | if (ret) |
| 137 | goto out; |
| 138 | } |
| 139 | out: |
| 140 | drm_modeset_unlock_all(dev); |
| 141 | return ret; |
| 142 | } |
| 143 | EXPORT_SYMBOL(drm_crtc_force_disable_all); |
| 144 | |
| 145 | static unsigned int drm_num_crtcs(struct drm_device *dev) |
| 146 | { |
| 147 | unsigned int num = 0; |
| 148 | struct drm_crtc *tmp; |
| 149 | |
| 150 | drm_for_each_crtc(tmp, dev) { |
| 151 | num++; |
| 152 | } |
| 153 | |
| 154 | return num; |
| 155 | } |
| 156 | |
| 157 | int drm_crtc_register_all(struct drm_device *dev) |
| 158 | { |
| 159 | struct drm_crtc *crtc; |
| 160 | int ret = 0; |
| 161 | |
| 162 | drm_for_each_crtc(crtc, dev) { |
| 163 | if (drm_debugfs_crtc_add(crtc)) |
| 164 | DRM_ERROR("Failed to initialize debugfs entry for CRTC '%s'.\n", |
| 165 | crtc->name); |
| 166 | |
| 167 | if (crtc->funcs->late_register) |
| 168 | ret = crtc->funcs->late_register(crtc); |
| 169 | if (ret) |
| 170 | return ret; |
| 171 | } |
| 172 | |
| 173 | return 0; |
| 174 | } |
| 175 | |
| 176 | void drm_crtc_unregister_all(struct drm_device *dev) |
| 177 | { |
| 178 | struct drm_crtc *crtc; |
| 179 | |
| 180 | drm_for_each_crtc(crtc, dev) { |
| 181 | if (crtc->funcs->early_unregister) |
| 182 | crtc->funcs->early_unregister(crtc); |
| 183 | drm_debugfs_crtc_remove(crtc); |
| 184 | } |
| 185 | } |
| 186 | |
| 187 | static int drm_crtc_crc_init(struct drm_crtc *crtc) |
| 188 | { |
| 189 | #ifdef CONFIG_DEBUG_FS |
| 190 | spin_lock_init(&crtc->crc.lock); |
| 191 | init_waitqueue_head(&crtc->crc.wq); |
| 192 | crtc->crc.source = kstrdup("auto", GFP_KERNEL); |
| 193 | if (!crtc->crc.source) |
| 194 | return -ENOMEM; |
| 195 | #endif |
| 196 | return 0; |
| 197 | } |
| 198 | |
| 199 | static void drm_crtc_crc_fini(struct drm_crtc *crtc) |
| 200 | { |
| 201 | #ifdef CONFIG_DEBUG_FS |
| 202 | kfree(crtc->crc.source); |
| 203 | #endif |
| 204 | } |
| 205 | |
| 206 | static const struct dma_fence_ops drm_crtc_fence_ops; |
| 207 | |
| 208 | static struct drm_crtc *fence_to_crtc(struct dma_fence *fence) |
| 209 | { |
| 210 | BUG_ON(fence->ops != &drm_crtc_fence_ops); |
| 211 | return container_of(fence->lock, struct drm_crtc, fence_lock); |
| 212 | } |
| 213 | |
| 214 | static const char *drm_crtc_fence_get_driver_name(struct dma_fence *fence) |
| 215 | { |
| 216 | struct drm_crtc *crtc = fence_to_crtc(fence); |
| 217 | |
| 218 | return crtc->dev->driver->name; |
| 219 | } |
| 220 | |
| 221 | static const char *drm_crtc_fence_get_timeline_name(struct dma_fence *fence) |
| 222 | { |
| 223 | struct drm_crtc *crtc = fence_to_crtc(fence); |
| 224 | |
| 225 | return crtc->timeline_name; |
| 226 | } |
| 227 | |
| 228 | static bool drm_crtc_fence_enable_signaling(struct dma_fence *fence) |
| 229 | { |
| 230 | return true; |
| 231 | } |
| 232 | |
| 233 | static const struct dma_fence_ops drm_crtc_fence_ops = { |
| 234 | .get_driver_name = drm_crtc_fence_get_driver_name, |
| 235 | .get_timeline_name = drm_crtc_fence_get_timeline_name, |
| 236 | .enable_signaling = drm_crtc_fence_enable_signaling, |
| 237 | .wait = dma_fence_default_wait, |
| 238 | }; |
| 239 | |
| 240 | struct dma_fence *drm_crtc_create_fence(struct drm_crtc *crtc) |
| 241 | { |
| 242 | struct dma_fence *fence; |
| 243 | |
| 244 | fence = kzalloc(sizeof(*fence), GFP_KERNEL); |
| 245 | if (!fence) |
| 246 | return NULL; |
| 247 | |
| 248 | dma_fence_init(fence, &drm_crtc_fence_ops, &crtc->fence_lock, |
| 249 | crtc->fence_context, ++crtc->fence_seqno); |
| 250 | |
| 251 | return fence; |
| 252 | } |
| 253 | |
| 254 | /** |
| 255 | * drm_crtc_init_with_planes - Initialise a new CRTC object with |
| 256 | * specified primary and cursor planes. |
| 257 | * @dev: DRM device |
| 258 | * @crtc: CRTC object to init |
| 259 | * @primary: Primary plane for CRTC |
| 260 | * @cursor: Cursor plane for CRTC |
| 261 | * @funcs: callbacks for the new CRTC |
| 262 | * @name: printf style format string for the CRTC name, or NULL for default name |
| 263 | * |
| 264 | * Inits a new object created as base part of a driver crtc object. Drivers |
| 265 | * should use this function instead of drm_crtc_init(), which is only provided |
| 266 | * for backwards compatibility with drivers which do not yet support universal |
| 267 | * planes). For really simple hardware which has only 1 plane look at |
| 268 | * drm_simple_display_pipe_init() instead. |
| 269 | * |
| 270 | * Returns: |
| 271 | * Zero on success, error code on failure. |
| 272 | */ |
| 273 | int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc, |
| 274 | struct drm_plane *primary, |
| 275 | struct drm_plane *cursor, |
| 276 | const struct drm_crtc_funcs *funcs, |
| 277 | const char *name, ...) |
| 278 | { |
| 279 | struct drm_mode_config *config = &dev->mode_config; |
| 280 | int ret; |
| 281 | |
| 282 | WARN_ON(primary && primary->type != DRM_PLANE_TYPE_PRIMARY); |
| 283 | WARN_ON(cursor && cursor->type != DRM_PLANE_TYPE_CURSOR); |
| 284 | |
| 285 | crtc->dev = dev; |
| 286 | crtc->funcs = funcs; |
| 287 | |
| 288 | INIT_LIST_HEAD(&crtc->commit_list); |
| 289 | spin_lock_init(&crtc->commit_lock); |
| 290 | |
| 291 | drm_modeset_lock_init(&crtc->mutex); |
| 292 | ret = drm_mode_object_add(dev, &crtc->base, DRM_MODE_OBJECT_CRTC); |
| 293 | if (ret) |
| 294 | return ret; |
| 295 | |
| 296 | if (name) { |
| 297 | va_list ap; |
| 298 | |
| 299 | va_start(ap, name); |
| 300 | crtc->name = kvasprintf(GFP_KERNEL, name, ap); |
| 301 | va_end(ap); |
| 302 | } else { |
| 303 | crtc->name = kasprintf(GFP_KERNEL, "crtc-%d", |
| 304 | drm_num_crtcs(dev)); |
| 305 | } |
| 306 | if (!crtc->name) { |
| 307 | drm_mode_object_unregister(dev, &crtc->base); |
| 308 | return -ENOMEM; |
| 309 | } |
| 310 | |
| 311 | crtc->fence_context = dma_fence_context_alloc(1); |
| 312 | spin_lock_init(&crtc->fence_lock); |
| 313 | snprintf(crtc->timeline_name, sizeof(crtc->timeline_name), |
| 314 | "CRTC:%d-%s", crtc->base.id, crtc->name); |
| 315 | |
| 316 | crtc->base.properties = &crtc->properties; |
| 317 | |
| 318 | list_add_tail(&crtc->head, &config->crtc_list); |
| 319 | crtc->index = config->num_crtc++; |
| 320 | |
| 321 | crtc->primary = primary; |
| 322 | crtc->cursor = cursor; |
| 323 | if (primary && !primary->possible_crtcs) |
| 324 | primary->possible_crtcs = 1 << drm_crtc_index(crtc); |
| 325 | if (cursor && !cursor->possible_crtcs) |
| 326 | cursor->possible_crtcs = 1 << drm_crtc_index(crtc); |
| 327 | |
| 328 | ret = drm_crtc_crc_init(crtc); |
| 329 | if (ret) { |
| 330 | drm_mode_object_unregister(dev, &crtc->base); |
| 331 | return ret; |
| 332 | } |
| 333 | |
| 334 | if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { |
| 335 | drm_object_attach_property(&crtc->base, config->prop_active, 0); |
| 336 | drm_object_attach_property(&crtc->base, config->prop_mode_id, 0); |
| 337 | drm_object_attach_property(&crtc->base, |
| 338 | config->prop_out_fence_ptr, 0); |
| 339 | } |
| 340 | |
| 341 | return 0; |
| 342 | } |
| 343 | EXPORT_SYMBOL(drm_crtc_init_with_planes); |
| 344 | |
| 345 | /** |
| 346 | * drm_crtc_cleanup - Clean up the core crtc usage |
| 347 | * @crtc: CRTC to cleanup |
| 348 | * |
| 349 | * This function cleans up @crtc and removes it from the DRM mode setting |
| 350 | * core. Note that the function does *not* free the crtc structure itself, |
| 351 | * this is the responsibility of the caller. |
| 352 | */ |
| 353 | void drm_crtc_cleanup(struct drm_crtc *crtc) |
| 354 | { |
| 355 | struct drm_device *dev = crtc->dev; |
| 356 | |
| 357 | /* Note that the crtc_list is considered to be static; should we |
| 358 | * remove the drm_crtc at runtime we would have to decrement all |
| 359 | * the indices on the drm_crtc after us in the crtc_list. |
| 360 | */ |
| 361 | |
| 362 | drm_crtc_crc_fini(crtc); |
| 363 | |
| 364 | kfree(crtc->gamma_store); |
| 365 | crtc->gamma_store = NULL; |
| 366 | |
| 367 | drm_modeset_lock_fini(&crtc->mutex); |
| 368 | |
| 369 | drm_mode_object_unregister(dev, &crtc->base); |
| 370 | list_del(&crtc->head); |
| 371 | dev->mode_config.num_crtc--; |
| 372 | |
| 373 | WARN_ON(crtc->state && !crtc->funcs->atomic_destroy_state); |
| 374 | if (crtc->state && crtc->funcs->atomic_destroy_state) |
| 375 | crtc->funcs->atomic_destroy_state(crtc, crtc->state); |
| 376 | |
| 377 | kfree(crtc->name); |
| 378 | |
| 379 | memset(crtc, 0, sizeof(*crtc)); |
| 380 | } |
| 381 | EXPORT_SYMBOL(drm_crtc_cleanup); |
| 382 | |
| 383 | /** |
| 384 | * drm_mode_getcrtc - get CRTC configuration |
| 385 | * @dev: drm device for the ioctl |
| 386 | * @data: data pointer for the ioctl |
| 387 | * @file_priv: drm file for the ioctl call |
| 388 | * |
| 389 | * Construct a CRTC configuration structure to return to the user. |
| 390 | * |
| 391 | * Called by the user via ioctl. |
| 392 | * |
| 393 | * Returns: |
| 394 | * Zero on success, negative errno on failure. |
| 395 | */ |
| 396 | int drm_mode_getcrtc(struct drm_device *dev, |
| 397 | void *data, struct drm_file *file_priv) |
| 398 | { |
| 399 | struct drm_mode_crtc *crtc_resp = data; |
| 400 | struct drm_crtc *crtc; |
| 401 | |
| 402 | if (!drm_core_check_feature(dev, DRIVER_MODESET)) |
| 403 | return -EINVAL; |
| 404 | |
| 405 | crtc = drm_crtc_find(dev, crtc_resp->crtc_id); |
| 406 | if (!crtc) |
| 407 | return -ENOENT; |
| 408 | |
| 409 | crtc_resp->gamma_size = crtc->gamma_size; |
| 410 | |
| 411 | drm_modeset_lock(&crtc->primary->mutex, NULL); |
| 412 | if (crtc->primary->state && crtc->primary->state->fb) |
| 413 | crtc_resp->fb_id = crtc->primary->state->fb->base.id; |
| 414 | else if (!crtc->primary->state && crtc->primary->fb) |
| 415 | crtc_resp->fb_id = crtc->primary->fb->base.id; |
| 416 | else |
| 417 | crtc_resp->fb_id = 0; |
| 418 | |
| 419 | if (crtc->primary->state) { |
| 420 | crtc_resp->x = crtc->primary->state->src_x >> 16; |
| 421 | crtc_resp->y = crtc->primary->state->src_y >> 16; |
| 422 | } |
| 423 | drm_modeset_unlock(&crtc->primary->mutex); |
| 424 | |
| 425 | drm_modeset_lock(&crtc->mutex, NULL); |
| 426 | if (crtc->state) { |
| 427 | if (crtc->state->enable) { |
| 428 | drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->state->mode); |
| 429 | crtc_resp->mode_valid = 1; |
| 430 | |
| 431 | } else { |
| 432 | crtc_resp->mode_valid = 0; |
| 433 | } |
| 434 | } else { |
| 435 | crtc_resp->x = crtc->x; |
| 436 | crtc_resp->y = crtc->y; |
| 437 | if (crtc->enabled) { |
| 438 | drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->mode); |
| 439 | crtc_resp->mode_valid = 1; |
| 440 | |
| 441 | } else { |
| 442 | crtc_resp->mode_valid = 0; |
| 443 | } |
| 444 | } |
| 445 | drm_modeset_unlock(&crtc->mutex); |
| 446 | |
| 447 | return 0; |
| 448 | } |
| 449 | |
| 450 | static int __drm_mode_set_config_internal(struct drm_mode_set *set, |
| 451 | struct drm_modeset_acquire_ctx *ctx) |
| 452 | { |
| 453 | struct drm_crtc *crtc = set->crtc; |
| 454 | struct drm_framebuffer *fb; |
| 455 | struct drm_crtc *tmp; |
| 456 | int ret; |
| 457 | |
| 458 | /* |
| 459 | * NOTE: ->set_config can also disable other crtcs (if we steal all |
| 460 | * connectors from it), hence we need to refcount the fbs across all |
| 461 | * crtcs. Atomic modeset will have saner semantics ... |
| 462 | */ |
| 463 | drm_for_each_crtc(tmp, crtc->dev) |
| 464 | tmp->primary->old_fb = tmp->primary->fb; |
| 465 | |
| 466 | fb = set->fb; |
| 467 | |
| 468 | ret = crtc->funcs->set_config(set, ctx); |
| 469 | if (ret == 0) { |
| 470 | crtc->primary->crtc = crtc; |
| 471 | crtc->primary->fb = fb; |
| 472 | } |
| 473 | |
| 474 | drm_for_each_crtc(tmp, crtc->dev) { |
| 475 | if (tmp->primary->fb) |
| 476 | drm_framebuffer_get(tmp->primary->fb); |
| 477 | if (tmp->primary->old_fb) |
| 478 | drm_framebuffer_put(tmp->primary->old_fb); |
| 479 | tmp->primary->old_fb = NULL; |
| 480 | } |
| 481 | |
| 482 | return ret; |
| 483 | } |
| 484 | /** |
| 485 | * drm_mode_set_config_internal - helper to call &drm_mode_config_funcs.set_config |
| 486 | * @set: modeset config to set |
| 487 | * |
| 488 | * This is a little helper to wrap internal calls to the |
| 489 | * &drm_mode_config_funcs.set_config driver interface. The only thing it adds is |
| 490 | * correct refcounting dance. |
| 491 | * |
| 492 | * This should only be used by non-atomic legacy drivers. |
| 493 | * |
| 494 | * Returns: |
| 495 | * Zero on success, negative errno on failure. |
| 496 | */ |
| 497 | int drm_mode_set_config_internal(struct drm_mode_set *set) |
| 498 | { |
| 499 | WARN_ON(drm_drv_uses_atomic_modeset(set->crtc->dev)); |
| 500 | |
| 501 | return __drm_mode_set_config_internal(set, NULL); |
| 502 | } |
| 503 | EXPORT_SYMBOL(drm_mode_set_config_internal); |
| 504 | |
| 505 | /** |
| 506 | * drm_crtc_check_viewport - Checks that a framebuffer is big enough for the |
| 507 | * CRTC viewport |
| 508 | * @crtc: CRTC that framebuffer will be displayed on |
| 509 | * @x: x panning |
| 510 | * @y: y panning |
| 511 | * @mode: mode that framebuffer will be displayed under |
| 512 | * @fb: framebuffer to check size of |
| 513 | */ |
| 514 | int drm_crtc_check_viewport(const struct drm_crtc *crtc, |
| 515 | int x, int y, |
| 516 | const struct drm_display_mode *mode, |
| 517 | const struct drm_framebuffer *fb) |
| 518 | |
| 519 | { |
| 520 | int hdisplay, vdisplay; |
| 521 | |
| 522 | drm_mode_get_hv_timing(mode, &hdisplay, &vdisplay); |
| 523 | |
| 524 | if (crtc->state && |
| 525 | drm_rotation_90_or_270(crtc->primary->state->rotation)) |
| 526 | swap(hdisplay, vdisplay); |
| 527 | |
| 528 | return drm_framebuffer_check_src_coords(x << 16, y << 16, |
| 529 | hdisplay << 16, vdisplay << 16, |
| 530 | fb); |
| 531 | } |
| 532 | EXPORT_SYMBOL(drm_crtc_check_viewport); |
| 533 | |
| 534 | /** |
| 535 | * drm_mode_setcrtc - set CRTC configuration |
| 536 | * @dev: drm device for the ioctl |
| 537 | * @data: data pointer for the ioctl |
| 538 | * @file_priv: drm file for the ioctl call |
| 539 | * |
| 540 | * Build a new CRTC configuration based on user request. |
| 541 | * |
| 542 | * Called by the user via ioctl. |
| 543 | * |
| 544 | * Returns: |
| 545 | * Zero on success, negative errno on failure. |
| 546 | */ |
| 547 | int drm_mode_setcrtc(struct drm_device *dev, void *data, |
| 548 | struct drm_file *file_priv) |
| 549 | { |
| 550 | struct drm_mode_config *config = &dev->mode_config; |
| 551 | struct drm_mode_crtc *crtc_req = data; |
| 552 | struct drm_crtc *crtc; |
| 553 | struct drm_connector **connector_set = NULL, *connector; |
| 554 | struct drm_framebuffer *fb = NULL; |
| 555 | struct drm_display_mode *mode = NULL; |
| 556 | struct drm_mode_set set; |
| 557 | uint32_t __user *set_connectors_ptr; |
| 558 | struct drm_modeset_acquire_ctx ctx; |
| 559 | int ret; |
| 560 | int i; |
| 561 | |
| 562 | if (!drm_core_check_feature(dev, DRIVER_MODESET)) |
| 563 | return -EINVAL; |
| 564 | |
| 565 | /* |
| 566 | * Universal plane src offsets are only 16.16, prevent havoc for |
| 567 | * drivers using universal plane code internally. |
| 568 | */ |
| 569 | if (crtc_req->x & 0xffff0000 || crtc_req->y & 0xffff0000) |
| 570 | return -ERANGE; |
| 571 | |
| 572 | crtc = drm_crtc_find(dev, crtc_req->crtc_id); |
| 573 | if (!crtc) { |
| 574 | DRM_DEBUG_KMS("Unknown CRTC ID %d\n", crtc_req->crtc_id); |
| 575 | return -ENOENT; |
| 576 | } |
| 577 | DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name); |
| 578 | |
| 579 | mutex_lock(&crtc->dev->mode_config.mutex); |
| 580 | drm_modeset_acquire_init(&ctx, 0); |
| 581 | retry: |
| 582 | ret = drm_modeset_lock_all_ctx(crtc->dev, &ctx); |
| 583 | if (ret) |
| 584 | goto out; |
| 585 | if (crtc_req->mode_valid) { |
| 586 | /* If we have a mode we need a framebuffer. */ |
| 587 | /* If we pass -1, set the mode with the currently bound fb */ |
| 588 | if (crtc_req->fb_id == -1) { |
| 589 | if (!crtc->primary->fb) { |
| 590 | DRM_DEBUG_KMS("CRTC doesn't have current FB\n"); |
| 591 | ret = -EINVAL; |
| 592 | goto out; |
| 593 | } |
| 594 | fb = crtc->primary->fb; |
| 595 | /* Make refcounting symmetric with the lookup path. */ |
| 596 | drm_framebuffer_get(fb); |
| 597 | } else { |
| 598 | fb = drm_framebuffer_lookup(dev, crtc_req->fb_id); |
| 599 | if (!fb) { |
| 600 | DRM_DEBUG_KMS("Unknown FB ID%d\n", |
| 601 | crtc_req->fb_id); |
| 602 | ret = -ENOENT; |
| 603 | goto out; |
| 604 | } |
| 605 | } |
| 606 | |
| 607 | mode = drm_mode_create(dev); |
| 608 | if (!mode) { |
| 609 | ret = -ENOMEM; |
| 610 | goto out; |
| 611 | } |
| 612 | |
| 613 | ret = drm_mode_convert_umode(mode, &crtc_req->mode); |
| 614 | if (ret) { |
| 615 | DRM_DEBUG_KMS("Invalid mode\n"); |
| 616 | goto out; |
| 617 | } |
| 618 | |
| 619 | /* |
| 620 | * Check whether the primary plane supports the fb pixel format. |
| 621 | * Drivers not implementing the universal planes API use a |
| 622 | * default formats list provided by the DRM core which doesn't |
| 623 | * match real hardware capabilities. Skip the check in that |
| 624 | * case. |
| 625 | */ |
| 626 | if (!crtc->primary->format_default) { |
| 627 | ret = drm_plane_check_pixel_format(crtc->primary, |
| 628 | fb->format->format); |
| 629 | if (ret) { |
| 630 | struct drm_format_name_buf format_name; |
| 631 | DRM_DEBUG_KMS("Invalid pixel format %s\n", |
| 632 | drm_get_format_name(fb->format->format, |
| 633 | &format_name)); |
| 634 | goto out; |
| 635 | } |
| 636 | } |
| 637 | |
| 638 | ret = drm_crtc_check_viewport(crtc, crtc_req->x, crtc_req->y, |
| 639 | mode, fb); |
| 640 | if (ret) |
| 641 | goto out; |
| 642 | |
| 643 | } |
| 644 | |
| 645 | if (crtc_req->count_connectors == 0 && mode) { |
| 646 | DRM_DEBUG_KMS("Count connectors is 0 but mode set\n"); |
| 647 | ret = -EINVAL; |
| 648 | goto out; |
| 649 | } |
| 650 | |
| 651 | if (crtc_req->count_connectors > 0 && (!mode || !fb)) { |
| 652 | DRM_DEBUG_KMS("Count connectors is %d but no mode or fb set\n", |
| 653 | crtc_req->count_connectors); |
| 654 | ret = -EINVAL; |
| 655 | goto out; |
| 656 | } |
| 657 | |
| 658 | if (crtc_req->count_connectors > 0) { |
| 659 | u32 out_id; |
| 660 | |
| 661 | /* Avoid unbounded kernel memory allocation */ |
| 662 | if (crtc_req->count_connectors > config->num_connector) { |
| 663 | ret = -EINVAL; |
| 664 | goto out; |
| 665 | } |
| 666 | |
| 667 | connector_set = kmalloc_array(crtc_req->count_connectors, |
| 668 | sizeof(struct drm_connector *), |
| 669 | GFP_KERNEL); |
| 670 | if (!connector_set) { |
| 671 | ret = -ENOMEM; |
| 672 | goto out; |
| 673 | } |
| 674 | |
| 675 | for (i = 0; i < crtc_req->count_connectors; i++) { |
| 676 | connector_set[i] = NULL; |
| 677 | set_connectors_ptr = (uint32_t __user *)(unsigned long)crtc_req->set_connectors_ptr; |
| 678 | if (get_user(out_id, &set_connectors_ptr[i])) { |
| 679 | ret = -EFAULT; |
| 680 | goto out; |
| 681 | } |
| 682 | |
| 683 | connector = drm_connector_lookup(dev, out_id); |
| 684 | if (!connector) { |
| 685 | DRM_DEBUG_KMS("Connector id %d unknown\n", |
| 686 | out_id); |
| 687 | ret = -ENOENT; |
| 688 | goto out; |
| 689 | } |
| 690 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", |
| 691 | connector->base.id, |
| 692 | connector->name); |
| 693 | |
| 694 | connector_set[i] = connector; |
| 695 | } |
| 696 | } |
| 697 | |
| 698 | set.crtc = crtc; |
| 699 | set.x = crtc_req->x; |
| 700 | set.y = crtc_req->y; |
| 701 | set.mode = mode; |
| 702 | set.connectors = connector_set; |
| 703 | set.num_connectors = crtc_req->count_connectors; |
| 704 | set.fb = fb; |
| 705 | ret = __drm_mode_set_config_internal(&set, &ctx); |
| 706 | |
| 707 | out: |
| 708 | if (fb) |
| 709 | drm_framebuffer_put(fb); |
| 710 | |
| 711 | if (connector_set) { |
| 712 | for (i = 0; i < crtc_req->count_connectors; i++) { |
| 713 | if (connector_set[i]) |
| 714 | drm_connector_put(connector_set[i]); |
| 715 | } |
| 716 | } |
| 717 | kfree(connector_set); |
| 718 | drm_mode_destroy(dev, mode); |
| 719 | if (ret == -EDEADLK) { |
| 720 | drm_modeset_backoff(&ctx); |
| 721 | goto retry; |
| 722 | } |
| 723 | drm_modeset_drop_locks(&ctx); |
| 724 | drm_modeset_acquire_fini(&ctx); |
| 725 | mutex_unlock(&crtc->dev->mode_config.mutex); |
| 726 | |
| 727 | return ret; |
| 728 | } |
| 729 | |
| 730 | int drm_mode_crtc_set_obj_prop(struct drm_mode_object *obj, |
| 731 | struct drm_property *property, |
| 732 | uint64_t value) |
| 733 | { |
| 734 | int ret = -EINVAL; |
| 735 | struct drm_crtc *crtc = obj_to_crtc(obj); |
| 736 | |
| 737 | if (crtc->funcs->set_property) |
| 738 | ret = crtc->funcs->set_property(crtc, property, value); |
| 739 | if (!ret) |
| 740 | drm_object_property_set_value(obj, property, value); |
| 741 | |
| 742 | return ret; |
| 743 | } |