1/*
   2 * Copyright (C) 2014 Red Hat
   3 * Copyright (C) 2014 Intel Corp.
 
   4 *
   5 * Permission is hereby granted, free of charge, to any person obtaining a
   6 * copy of this software and associated documentation files (the "Software"),
   7 * to deal in the Software without restriction, including without limitation
   8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9 * and/or sell copies of the Software, and to permit persons to whom the
  10 * Software is furnished to do so, subject to the following conditions:
  11 *
  12 * The above copyright notice and this permission notice shall be included in
  13 * all copies or substantial portions of the Software.
  14 *
  15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  19 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  20 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  21 * OTHER DEALINGS IN THE SOFTWARE.
  22 *
  23 * Authors:
  24 * Rob Clark <robdclark@gmail.com>
  25 * Daniel Vetter <daniel.vetter@ffwll.ch>
  26 */
  27
  28
  29#include <linux/sync_file.h>
  30
  31#include <drm/drm_atomic.h>
  32#include <drm/drm_atomic_uapi.h>
 
 
  33#include <drm/drm_debugfs.h>
  34#include <drm/drm_device.h>
  35#include <drm/drm_drv.h>
  36#include <drm/drm_file.h>
  37#include <drm/drm_fourcc.h>
 
  38#include <drm/drm_mode.h>
  39#include <drm/drm_print.h>
  40#include <drm/drm_writeback.h>
  41
  42#include "drm_crtc_internal.h"
  43#include "drm_internal.h"
  44
  45void __drm_crtc_commit_free(struct kref *kref)
  46{
  47	struct drm_crtc_commit *commit =
  48		container_of(kref, struct drm_crtc_commit, ref);
  49
  50	kfree(commit);
  51}
  52EXPORT_SYMBOL(__drm_crtc_commit_free);
  53
  54/**
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  55 * drm_atomic_state_default_release -
  56 * release memory initialized by drm_atomic_state_init
  57 * @state: atomic state
  58 *
  59 * Free all the memory allocated by drm_atomic_state_init.
  60 * This should only be used by drivers which are still subclassing
  61 * &drm_atomic_state and haven't switched to &drm_private_state yet.
  62 */
  63void drm_atomic_state_default_release(struct drm_atomic_state *state)
  64{
  65	kfree(state->connectors);
  66	kfree(state->crtcs);
  67	kfree(state->planes);
  68	kfree(state->private_objs);
  69}
  70EXPORT_SYMBOL(drm_atomic_state_default_release);
  71
  72/**
  73 * drm_atomic_state_init - init new atomic state
  74 * @dev: DRM device
  75 * @state: atomic state
  76 *
  77 * Default implementation for filling in a new atomic state.
  78 * This should only be used by drivers which are still subclassing
  79 * &drm_atomic_state and haven't switched to &drm_private_state yet.
  80 */
  81int
  82drm_atomic_state_init(struct drm_device *dev, struct drm_atomic_state *state)
  83{
  84	kref_init(&state->ref);
  85
  86	/* TODO legacy paths should maybe do a better job about
  87	 * setting this appropriately?
  88	 */
  89	state->allow_modeset = true;
  90
  91	state->crtcs = kcalloc(dev->mode_config.num_crtc,
  92			       sizeof(*state->crtcs), GFP_KERNEL);
  93	if (!state->crtcs)
  94		goto fail;
  95	state->planes = kcalloc(dev->mode_config.num_total_plane,
  96				sizeof(*state->planes), GFP_KERNEL);
  97	if (!state->planes)
  98		goto fail;
  99
 100	state->dev = dev;
 101
 102	DRM_DEBUG_ATOMIC("Allocated atomic state %p\n", state);
 103
 104	return 0;
 105fail:
 106	drm_atomic_state_default_release(state);
 107	return -ENOMEM;
 108}
 109EXPORT_SYMBOL(drm_atomic_state_init);
 110
 111/**
 112 * drm_atomic_state_alloc - allocate atomic state
 113 * @dev: DRM device
 114 *
 115 * This allocates an empty atomic state to track updates.
 116 */
 117struct drm_atomic_state *
 118drm_atomic_state_alloc(struct drm_device *dev)
 119{
 120	struct drm_mode_config *config = &dev->mode_config;
 121
 122	if (!config->funcs->atomic_state_alloc) {
 123		struct drm_atomic_state *state;
 124
 125		state = kzalloc(sizeof(*state), GFP_KERNEL);
 126		if (!state)
 127			return NULL;
 128		if (drm_atomic_state_init(dev, state) < 0) {
 129			kfree(state);
 130			return NULL;
 131		}
 132		return state;
 133	}
 134
 135	return config->funcs->atomic_state_alloc(dev);
 136}
 137EXPORT_SYMBOL(drm_atomic_state_alloc);
 138
 139/**
 140 * drm_atomic_state_default_clear - clear base atomic state
 141 * @state: atomic state
 142 *
 143 * Default implementation for clearing atomic state.
 144 * This should only be used by drivers which are still subclassing
 145 * &drm_atomic_state and haven't switched to &drm_private_state yet.
 146 */
 147void drm_atomic_state_default_clear(struct drm_atomic_state *state)
 148{
 149	struct drm_device *dev = state->dev;
 150	struct drm_mode_config *config = &dev->mode_config;
 151	int i;
 152
 153	DRM_DEBUG_ATOMIC("Clearing atomic state %p\n", state);
 154
 155	for (i = 0; i < state->num_connector; i++) {
 156		struct drm_connector *connector = state->connectors[i].ptr;
 157
 158		if (!connector)
 159			continue;
 160
 161		connector->funcs->atomic_destroy_state(connector,
 162						       state->connectors[i].state);
 163		state->connectors[i].ptr = NULL;
 164		state->connectors[i].state = NULL;
 165		state->connectors[i].old_state = NULL;
 166		state->connectors[i].new_state = NULL;
 167		drm_connector_put(connector);
 168	}
 169
 170	for (i = 0; i < config->num_crtc; i++) {
 171		struct drm_crtc *crtc = state->crtcs[i].ptr;
 172
 173		if (!crtc)
 174			continue;
 175
 176		crtc->funcs->atomic_destroy_state(crtc,
 177						  state->crtcs[i].state);
 178
 179		state->crtcs[i].ptr = NULL;
 180		state->crtcs[i].state = NULL;
 181		state->crtcs[i].old_state = NULL;
 182		state->crtcs[i].new_state = NULL;
 183
 184		if (state->crtcs[i].commit) {
 185			drm_crtc_commit_put(state->crtcs[i].commit);
 186			state->crtcs[i].commit = NULL;
 187		}
 188	}
 189
 190	for (i = 0; i < config->num_total_plane; i++) {
 191		struct drm_plane *plane = state->planes[i].ptr;
 192
 193		if (!plane)
 194			continue;
 195
 196		plane->funcs->atomic_destroy_state(plane,
 197						   state->planes[i].state);
 198		state->planes[i].ptr = NULL;
 199		state->planes[i].state = NULL;
 200		state->planes[i].old_state = NULL;
 201		state->planes[i].new_state = NULL;
 202	}
 203
 204	for (i = 0; i < state->num_private_objs; i++) {
 205		struct drm_private_obj *obj = state->private_objs[i].ptr;
 206
 207		obj->funcs->atomic_destroy_state(obj,
 208						 state->private_objs[i].state);
 209		state->private_objs[i].ptr = NULL;
 210		state->private_objs[i].state = NULL;
 211		state->private_objs[i].old_state = NULL;
 212		state->private_objs[i].new_state = NULL;
 213	}
 214	state->num_private_objs = 0;
 215
 216	if (state->fake_commit) {
 217		drm_crtc_commit_put(state->fake_commit);
 218		state->fake_commit = NULL;
 219	}
 220}
 221EXPORT_SYMBOL(drm_atomic_state_default_clear);
 222
 223/**
 224 * drm_atomic_state_clear - clear state object
 225 * @state: atomic state
 226 *
 227 * When the w/w mutex algorithm detects a deadlock we need to back off and drop
 228 * all locks. So someone else could sneak in and change the current modeset
 229 * configuration. Which means that all the state assembled in @state is no
 230 * longer an atomic update to the current state, but to some arbitrary earlier
 231 * state. Which could break assumptions the driver's
 232 * &drm_mode_config_funcs.atomic_check likely relies on.
 233 *
 234 * Hence we must clear all cached state and completely start over, using this
 235 * function.
 236 */
 237void drm_atomic_state_clear(struct drm_atomic_state *state)
 238{
 239	struct drm_device *dev = state->dev;
 240	struct drm_mode_config *config = &dev->mode_config;
 241
 242	if (config->funcs->atomic_state_clear)
 243		config->funcs->atomic_state_clear(state);
 244	else
 245		drm_atomic_state_default_clear(state);
 246}
 247EXPORT_SYMBOL(drm_atomic_state_clear);
 248
 249/**
 250 * __drm_atomic_state_free - free all memory for an atomic state
 251 * @ref: This atomic state to deallocate
 252 *
 253 * This frees all memory associated with an atomic state, including all the
 254 * per-object state for planes, crtcs and connectors.
 255 */
 256void __drm_atomic_state_free(struct kref *ref)
 257{
 258	struct drm_atomic_state *state = container_of(ref, typeof(*state), ref);
 259	struct drm_mode_config *config = &state->dev->mode_config;
 260
 261	drm_atomic_state_clear(state);
 262
 263	DRM_DEBUG_ATOMIC("Freeing atomic state %p\n", state);
 264
 265	if (config->funcs->atomic_state_free) {
 266		config->funcs->atomic_state_free(state);
 267	} else {
 268		drm_atomic_state_default_release(state);
 269		kfree(state);
 270	}
 271}
 272EXPORT_SYMBOL(__drm_atomic_state_free);
 273
 274/**
 275 * drm_atomic_get_crtc_state - get crtc state
 276 * @state: global atomic state object
 277 * @crtc: crtc to get state object for
 278 *
 279 * This function returns the crtc state for the given crtc, allocating it if
 280 * needed. It will also grab the relevant crtc lock to make sure that the state
 281 * is consistent.
 282 *
 
 
 
 
 283 * Returns:
 284 *
 285 * Either the allocated state or the error code encoded into the pointer. When
 286 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
 287 * entire atomic sequence must be restarted. All other errors are fatal.
 288 */
 289struct drm_crtc_state *
 290drm_atomic_get_crtc_state(struct drm_atomic_state *state,
 291			  struct drm_crtc *crtc)
 292{
 293	int ret, index = drm_crtc_index(crtc);
 294	struct drm_crtc_state *crtc_state;
 295
 296	WARN_ON(!state->acquire_ctx);
 297
 298	crtc_state = drm_atomic_get_existing_crtc_state(state, crtc);
 299	if (crtc_state)
 300		return crtc_state;
 301
 302	ret = drm_modeset_lock(&crtc->mutex, state->acquire_ctx);
 303	if (ret)
 304		return ERR_PTR(ret);
 305
 306	crtc_state = crtc->funcs->atomic_duplicate_state(crtc);
 307	if (!crtc_state)
 308		return ERR_PTR(-ENOMEM);
 309
 310	state->crtcs[index].state = crtc_state;
 311	state->crtcs[index].old_state = crtc->state;
 312	state->crtcs[index].new_state = crtc_state;
 313	state->crtcs[index].ptr = crtc;
 314	crtc_state->state = state;
 315
 316	DRM_DEBUG_ATOMIC("Added [CRTC:%d:%s] %p state to %p\n",
 317			 crtc->base.id, crtc->name, crtc_state, state);
 318
 319	return crtc_state;
 320}
 321EXPORT_SYMBOL(drm_atomic_get_crtc_state);
 322
 323static int drm_atomic_crtc_check(const struct drm_crtc_state *old_crtc_state,
 324				 const struct drm_crtc_state *new_crtc_state)
 325{
 326	struct drm_crtc *crtc = new_crtc_state->crtc;
 327
 328	/* NOTE: we explicitly don't enforce constraints such as primary
 329	 * layer covering entire screen, since that is something we want
 330	 * to allow (on hw that supports it).  For hw that does not, it
 331	 * should be checked in driver's crtc->atomic_check() vfunc.
 332	 *
 333	 * TODO: Add generic modeset state checks once we support those.
 334	 */
 335
 336	if (new_crtc_state->active && !new_crtc_state->enable) {
 337		DRM_DEBUG_ATOMIC("[CRTC:%d:%s] active without enabled\n",
 338				 crtc->base.id, crtc->name);
 
 339		return -EINVAL;
 340	}
 341
 342	/* The state->enable vs. state->mode_blob checks can be WARN_ON,
 343	 * as this is a kernel-internal detail that userspace should never
 344	 * be able to trigger. */
 
 345	if (drm_core_check_feature(crtc->dev, DRIVER_ATOMIC) &&
 346	    WARN_ON(new_crtc_state->enable && !new_crtc_state->mode_blob)) {
 347		DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enabled without mode blob\n",
 348				 crtc->base.id, crtc->name);
 
 349		return -EINVAL;
 350	}
 351
 352	if (drm_core_check_feature(crtc->dev, DRIVER_ATOMIC) &&
 353	    WARN_ON(!new_crtc_state->enable && new_crtc_state->mode_blob)) {
 354		DRM_DEBUG_ATOMIC("[CRTC:%d:%s] disabled with mode blob\n",
 355				 crtc->base.id, crtc->name);
 
 356		return -EINVAL;
 357	}
 358
 359	/*
 360	 * Reject event generation for when a CRTC is off and stays off.
 361	 * It wouldn't be hard to implement this, but userspace has a track
 362	 * record of happily burning through 100% cpu (or worse, crash) when the
 363	 * display pipe is suspended. To avoid all that fun just reject updates
 364	 * that ask for events since likely that indicates a bug in the
 365	 * compositor's drawing loop. This is consistent with the vblank IOCTL
 366	 * and legacy page_flip IOCTL which also reject service on a disabled
 367	 * pipe.
 368	 */
 369	if (new_crtc_state->event &&
 370	    !new_crtc_state->active && !old_crtc_state->active) {
 371		DRM_DEBUG_ATOMIC("[CRTC:%d:%s] requesting event but off\n",
 372				 crtc->base.id, crtc->name);
 
 373		return -EINVAL;
 374	}
 375
 376	return 0;
 377}
 378
 379static void drm_atomic_crtc_print_state(struct drm_printer *p,
 380		const struct drm_crtc_state *state)
 381{
 382	struct drm_crtc *crtc = state->crtc;
 383
 384	drm_printf(p, "crtc[%u]: %s\n", crtc->base.id, crtc->name);
 385	drm_printf(p, "\tenable=%d\n", state->enable);
 386	drm_printf(p, "\tactive=%d\n", state->active);
 387	drm_printf(p, "\tself_refresh_active=%d\n", state->self_refresh_active);
 388	drm_printf(p, "\tplanes_changed=%d\n", state->planes_changed);
 389	drm_printf(p, "\tmode_changed=%d\n", state->mode_changed);
 390	drm_printf(p, "\tactive_changed=%d\n", state->active_changed);
 391	drm_printf(p, "\tconnectors_changed=%d\n", state->connectors_changed);
 392	drm_printf(p, "\tcolor_mgmt_changed=%d\n", state->color_mgmt_changed);
 393	drm_printf(p, "\tplane_mask=%x\n", state->plane_mask);
 394	drm_printf(p, "\tconnector_mask=%x\n", state->connector_mask);
 395	drm_printf(p, "\tencoder_mask=%x\n", state->encoder_mask);
 396	drm_printf(p, "\tmode: " DRM_MODE_FMT "\n", DRM_MODE_ARG(&state->mode));
 397
 398	if (crtc->funcs->atomic_print_state)
 399		crtc->funcs->atomic_print_state(p, state);
 400}
 401
 402static int drm_atomic_connector_check(struct drm_connector *connector,
 403		struct drm_connector_state *state)
 404{
 405	struct drm_crtc_state *crtc_state;
 406	struct drm_writeback_job *writeback_job = state->writeback_job;
 407	const struct drm_display_info *info = &connector->display_info;
 408
 409	state->max_bpc = info->bpc ? info->bpc : 8;
 410	if (connector->max_bpc_property)
 411		state->max_bpc = min(state->max_bpc, state->max_requested_bpc);
 412
 413	if ((connector->connector_type != DRM_MODE_CONNECTOR_WRITEBACK) || !writeback_job)
 414		return 0;
 415
 416	if (writeback_job->fb && !state->crtc) {
 417		DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] framebuffer without CRTC\n",
 418				 connector->base.id, connector->name);
 
 419		return -EINVAL;
 420	}
 421
 422	if (state->crtc)
 423		crtc_state = drm_atomic_get_existing_crtc_state(state->state,
 424								state->crtc);
 425
 426	if (writeback_job->fb && !crtc_state->active) {
 427		DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] has framebuffer, but [CRTC:%d] is off\n",
 428				 connector->base.id, connector->name,
 429				 state->crtc->base.id);
 
 430		return -EINVAL;
 431	}
 432
 433	if (!writeback_job->fb) {
 434		if (writeback_job->out_fence) {
 435			DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] requesting out-fence without framebuffer\n",
 436					 connector->base.id, connector->name);
 
 437			return -EINVAL;
 438		}
 439
 440		drm_writeback_cleanup_job(writeback_job);
 441		state->writeback_job = NULL;
 442	}
 443
 444	return 0;
 445}
 446
 447/**
 448 * drm_atomic_get_plane_state - get plane state
 449 * @state: global atomic state object
 450 * @plane: plane to get state object for
 451 *
 452 * This function returns the plane state for the given plane, allocating it if
 453 * needed. It will also grab the relevant plane lock to make sure that the state
 454 * is consistent.
 455 *
 456 * Returns:
 457 *
 458 * Either the allocated state or the error code encoded into the pointer. When
 459 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
 460 * entire atomic sequence must be restarted. All other errors are fatal.
 461 */
 462struct drm_plane_state *
 463drm_atomic_get_plane_state(struct drm_atomic_state *state,
 464			  struct drm_plane *plane)
 465{
 466	int ret, index = drm_plane_index(plane);
 467	struct drm_plane_state *plane_state;
 468
 469	WARN_ON(!state->acquire_ctx);
 470
 471	/* the legacy pointers should never be set */
 472	WARN_ON(plane->fb);
 473	WARN_ON(plane->old_fb);
 474	WARN_ON(plane->crtc);
 475
 476	plane_state = drm_atomic_get_existing_plane_state(state, plane);
 477	if (plane_state)
 478		return plane_state;
 479
 480	ret = drm_modeset_lock(&plane->mutex, state->acquire_ctx);
 481	if (ret)
 482		return ERR_PTR(ret);
 483
 484	plane_state = plane->funcs->atomic_duplicate_state(plane);
 485	if (!plane_state)
 486		return ERR_PTR(-ENOMEM);
 487
 488	state->planes[index].state = plane_state;
 489	state->planes[index].ptr = plane;
 490	state->planes[index].old_state = plane->state;
 491	state->planes[index].new_state = plane_state;
 492	plane_state->state = state;
 493
 494	DRM_DEBUG_ATOMIC("Added [PLANE:%d:%s] %p state to %p\n",
 495			 plane->base.id, plane->name, plane_state, state);
 496
 497	if (plane_state->crtc) {
 498		struct drm_crtc_state *crtc_state;
 499
 500		crtc_state = drm_atomic_get_crtc_state(state,
 501						       plane_state->crtc);
 502		if (IS_ERR(crtc_state))
 503			return ERR_CAST(crtc_state);
 504	}
 505
 506	return plane_state;
 507}
 508EXPORT_SYMBOL(drm_atomic_get_plane_state);
 509
 510static bool
 511plane_switching_crtc(const struct drm_plane_state *old_plane_state,
 512		     const struct drm_plane_state *new_plane_state)
 513{
 514	if (!old_plane_state->crtc || !new_plane_state->crtc)
 515		return false;
 516
 517	if (old_plane_state->crtc == new_plane_state->crtc)
 518		return false;
 519
 520	/* This could be refined, but currently there's no helper or driver code
 521	 * to implement direct switching of active planes nor userspace to take
 522	 * advantage of more direct plane switching without the intermediate
 523	 * full OFF state.
 524	 */
 525	return true;
 526}
 527
 528/**
 529 * drm_atomic_plane_check - check plane state
 530 * @old_plane_state: old plane state to check
 531 * @new_plane_state: new plane state to check
 532 *
 533 * Provides core sanity checks for plane state.
 534 *
 535 * RETURNS:
 536 * Zero on success, error code on failure
 537 */
 538static int drm_atomic_plane_check(const struct drm_plane_state *old_plane_state,
 539				  const struct drm_plane_state *new_plane_state)
 540{
 541	struct drm_plane *plane = new_plane_state->plane;
 542	struct drm_crtc *crtc = new_plane_state->crtc;
 543	const struct drm_framebuffer *fb = new_plane_state->fb;
 544	unsigned int fb_width, fb_height;
 545	struct drm_mode_rect *clips;
 546	uint32_t num_clips;
 547	int ret;
 548
 549	/* either *both* CRTC and FB must be set, or neither */
 550	if (crtc && !fb) {
 551		DRM_DEBUG_ATOMIC("[PLANE:%d:%s] CRTC set but no FB\n",
 552				 plane->base.id, plane->name);
 553		return -EINVAL;
 554	} else if (fb && !crtc) {
 555		DRM_DEBUG_ATOMIC("[PLANE:%d:%s] FB set but no CRTC\n",
 556				 plane->base.id, plane->name);
 557		return -EINVAL;
 558	}
 559
 560	/* if disabled, we don't care about the rest of the state: */
 561	if (!crtc)
 562		return 0;
 563
 564	/* Check whether this plane is usable on this CRTC */
 565	if (!(plane->possible_crtcs & drm_crtc_mask(crtc))) {
 566		DRM_DEBUG_ATOMIC("Invalid [CRTC:%d:%s] for [PLANE:%d:%s]\n",
 567				 crtc->base.id, crtc->name,
 568				 plane->base.id, plane->name);
 
 569		return -EINVAL;
 570	}
 571
 572	/* Check whether this plane supports the fb pixel format. */
 573	ret = drm_plane_check_pixel_format(plane, fb->format->format,
 574					   fb->modifier);
 575	if (ret) {
 576		struct drm_format_name_buf format_name;
 577		DRM_DEBUG_ATOMIC("[PLANE:%d:%s] invalid pixel format %s, modifier 0x%llx\n",
 578				 plane->base.id, plane->name,
 579				 drm_get_format_name(fb->format->format,
 580						     &format_name),
 581				 fb->modifier);
 582		return ret;
 583	}
 584
 585	/* Give drivers some help against integer overflows */
 586	if (new_plane_state->crtc_w > INT_MAX ||
 587	    new_plane_state->crtc_x > INT_MAX - (int32_t) new_plane_state->crtc_w ||
 588	    new_plane_state->crtc_h > INT_MAX ||
 589	    new_plane_state->crtc_y > INT_MAX - (int32_t) new_plane_state->crtc_h) {
 590		DRM_DEBUG_ATOMIC("[PLANE:%d:%s] invalid CRTC coordinates %ux%u+%d+%d\n",
 591				 plane->base.id, plane->name,
 592				 new_plane_state->crtc_w, new_plane_state->crtc_h,
 593				 new_plane_state->crtc_x, new_plane_state->crtc_y);
 
 594		return -ERANGE;
 595	}
 596
 597	fb_width = fb->width << 16;
 598	fb_height = fb->height << 16;
 599
 600	/* Make sure source coordinates are inside the fb. */
 601	if (new_plane_state->src_w > fb_width ||
 602	    new_plane_state->src_x > fb_width - new_plane_state->src_w ||
 603	    new_plane_state->src_h > fb_height ||
 604	    new_plane_state->src_y > fb_height - new_plane_state->src_h) {
 605		DRM_DEBUG_ATOMIC("[PLANE:%d:%s] invalid source coordinates "
 606				 "%u.%06ux%u.%06u+%u.%06u+%u.%06u (fb %ux%u)\n",
 607				 plane->base.id, plane->name,
 608				 new_plane_state->src_w >> 16,
 609				 ((new_plane_state->src_w & 0xffff) * 15625) >> 10,
 610				 new_plane_state->src_h >> 16,
 611				 ((new_plane_state->src_h & 0xffff) * 15625) >> 10,
 612				 new_plane_state->src_x >> 16,
 613				 ((new_plane_state->src_x & 0xffff) * 15625) >> 10,
 614				 new_plane_state->src_y >> 16,
 615				 ((new_plane_state->src_y & 0xffff) * 15625) >> 10,
 616				 fb->width, fb->height);
 
 617		return -ENOSPC;
 618	}
 619
 620	clips = drm_plane_get_damage_clips(new_plane_state);
 621	num_clips = drm_plane_get_damage_clips_count(new_plane_state);
 622
 623	/* Make sure damage clips are valid and inside the fb. */
 624	while (num_clips > 0) {
 625		if (clips->x1 >= clips->x2 ||
 626		    clips->y1 >= clips->y2 ||
 627		    clips->x1 < 0 ||
 628		    clips->y1 < 0 ||
 629		    clips->x2 > fb_width ||
 630		    clips->y2 > fb_height) {
 631			DRM_DEBUG_ATOMIC("[PLANE:%d:%s] invalid damage clip %d %d %d %d\n",
 632					 plane->base.id, plane->name, clips->x1,
 633					 clips->y1, clips->x2, clips->y2);
 
 634			return -EINVAL;
 635		}
 636		clips++;
 637		num_clips--;
 638	}
 639
 640	if (plane_switching_crtc(old_plane_state, new_plane_state)) {
 641		DRM_DEBUG_ATOMIC("[PLANE:%d:%s] switching CRTC directly\n",
 642				 plane->base.id, plane->name);
 
 643		return -EINVAL;
 644	}
 645
 646	return 0;
 647}
 648
 649static void drm_atomic_plane_print_state(struct drm_printer *p,
 650		const struct drm_plane_state *state)
 651{
 652	struct drm_plane *plane = state->plane;
 653	struct drm_rect src  = drm_plane_state_src(state);
 654	struct drm_rect dest = drm_plane_state_dest(state);
 655
 656	drm_printf(p, "plane[%u]: %s\n", plane->base.id, plane->name);
 657	drm_printf(p, "\tcrtc=%s\n", state->crtc ? state->crtc->name : "(null)");
 658	drm_printf(p, "\tfb=%u\n", state->fb ? state->fb->base.id : 0);
 659	if (state->fb)
 660		drm_framebuffer_print_info(p, 2, state->fb);
 661	drm_printf(p, "\tcrtc-pos=" DRM_RECT_FMT "\n", DRM_RECT_ARG(&dest));
 662	drm_printf(p, "\tsrc-pos=" DRM_RECT_FP_FMT "\n", DRM_RECT_FP_ARG(&src));
 663	drm_printf(p, "\trotation=%x\n", state->rotation);
 664	drm_printf(p, "\tnormalized-zpos=%x\n", state->normalized_zpos);
 665	drm_printf(p, "\tcolor-encoding=%s\n",
 666		   drm_get_color_encoding_name(state->color_encoding));
 667	drm_printf(p, "\tcolor-range=%s\n",
 668		   drm_get_color_range_name(state->color_range));
 669
 670	if (plane->funcs->atomic_print_state)
 671		plane->funcs->atomic_print_state(p, state);
 672}
 673
 674/**
 675 * DOC: handling driver private state
 676 *
 677 * Very often the DRM objects exposed to userspace in the atomic modeset api
 678 * (&drm_connector, &drm_crtc and &drm_plane) do not map neatly to the
 679 * underlying hardware. Especially for any kind of shared resources (e.g. shared
 680 * clocks, scaler units, bandwidth and fifo limits shared among a group of
 681 * planes or CRTCs, and so on) it makes sense to model these as independent
 682 * objects. Drivers then need to do similar state tracking and commit ordering for
 683 * such private (since not exposed to userpace) objects as the atomic core and
 684 * helpers already provide for connectors, planes and CRTCs.
 685 *
 686 * To make this easier on drivers the atomic core provides some support to track
 687 * driver private state objects using struct &drm_private_obj, with the
 688 * associated state struct &drm_private_state.
 689 *
 690 * Similar to userspace-exposed objects, private state structures can be
 691 * acquired by calling drm_atomic_get_private_obj_state(). Since this function
 692 * does not take care of locking, drivers should wrap it for each type of
 693 * private state object they have with the required call to drm_modeset_lock()
 694 * for the corresponding &drm_modeset_lock.
 
 
 695 *
 696 * All private state structures contained in a &drm_atomic_state update can be
 697 * iterated using for_each_oldnew_private_obj_in_state(),
 698 * for_each_new_private_obj_in_state() and for_each_old_private_obj_in_state().
 699 * Drivers are recommended to wrap these for each type of driver private state
 700 * object they have, filtering on &drm_private_obj.funcs using for_each_if(), at
 701 * least if they want to iterate over all objects of a given type.
 702 *
 703 * An earlier way to handle driver private state was by subclassing struct
 704 * &drm_atomic_state. But since that encourages non-standard ways to implement
 705 * the check/commit split atomic requires (by using e.g. "check and rollback or
 706 * commit instead" of "duplicate state, check, then either commit or release
 707 * duplicated state) it is deprecated in favour of using &drm_private_state.
 708 */
 709
 710/**
 711 * drm_atomic_private_obj_init - initialize private object
 712 * @dev: DRM device this object will be attached to
 713 * @obj: private object
 714 * @state: initial private object state
 715 * @funcs: pointer to the struct of function pointers that identify the object
 716 * type
 717 *
 718 * Initialize the private object, which can be embedded into any
 719 * driver private object that needs its own atomic state.
 720 */
 721void
 722drm_atomic_private_obj_init(struct drm_device *dev,
 723			    struct drm_private_obj *obj,
 724			    struct drm_private_state *state,
 725			    const struct drm_private_state_funcs *funcs)
 726{
 727	memset(obj, 0, sizeof(*obj));
 728
 729	drm_modeset_lock_init(&obj->lock);
 730
 731	obj->state = state;
 732	obj->funcs = funcs;
 733	list_add_tail(&obj->head, &dev->mode_config.privobj_list);
 
 
 734}
 735EXPORT_SYMBOL(drm_atomic_private_obj_init);
 736
 737/**
 738 * drm_atomic_private_obj_fini - finalize private object
 739 * @obj: private object
 740 *
 741 * Finalize the private object.
 742 */
 743void
 744drm_atomic_private_obj_fini(struct drm_private_obj *obj)
 745{
 746	list_del(&obj->head);
 747	obj->funcs->atomic_destroy_state(obj, obj->state);
 748	drm_modeset_lock_fini(&obj->lock);
 749}
 750EXPORT_SYMBOL(drm_atomic_private_obj_fini);
 751
 752/**
 753 * drm_atomic_get_private_obj_state - get private object state
 754 * @state: global atomic state
 755 * @obj: private object to get the state for
 756 *
 757 * This function returns the private object state for the given private object,
 758 * allocating the state if needed. It will also grab the relevant private
 759 * object lock to make sure that the state is consistent.
 760 *
 761 * RETURNS:
 762 *
 763 * Either the allocated state or the error code encoded into a pointer.
 764 */
 765struct drm_private_state *
 766drm_atomic_get_private_obj_state(struct drm_atomic_state *state,
 767				 struct drm_private_obj *obj)
 768{
 769	int index, num_objs, i, ret;
 770	size_t size;
 771	struct __drm_private_objs_state *arr;
 772	struct drm_private_state *obj_state;
 773
 774	for (i = 0; i < state->num_private_objs; i++)
 775		if (obj == state->private_objs[i].ptr)
 776			return state->private_objs[i].state;
 777
 778	ret = drm_modeset_lock(&obj->lock, state->acquire_ctx);
 779	if (ret)
 780		return ERR_PTR(ret);
 781
 782	num_objs = state->num_private_objs + 1;
 783	size = sizeof(*state->private_objs) * num_objs;
 784	arr = krealloc(state->private_objs, size, GFP_KERNEL);
 785	if (!arr)
 786		return ERR_PTR(-ENOMEM);
 787
 788	state->private_objs = arr;
 789	index = state->num_private_objs;
 790	memset(&state->private_objs[index], 0, sizeof(*state->private_objs));
 791
 792	obj_state = obj->funcs->atomic_duplicate_state(obj);
 793	if (!obj_state)
 794		return ERR_PTR(-ENOMEM);
 795
 796	state->private_objs[index].state = obj_state;
 797	state->private_objs[index].old_state = obj->state;
 798	state->private_objs[index].new_state = obj_state;
 799	state->private_objs[index].ptr = obj;
 800	obj_state->state = state;
 801
 802	state->num_private_objs = num_objs;
 803
 804	DRM_DEBUG_ATOMIC("Added new private object %p state %p to %p\n",
 805			 obj, obj_state, state);
 
 806
 807	return obj_state;
 808}
 809EXPORT_SYMBOL(drm_atomic_get_private_obj_state);
 810
 811/**
 812 * drm_atomic_get_old_private_obj_state
 813 * @state: global atomic state object
 814 * @obj: private_obj to grab
 815 *
 816 * This function returns the old private object state for the given private_obj,
 817 * or NULL if the private_obj is not part of the global atomic state.
 818 */
 819struct drm_private_state *
 820drm_atomic_get_old_private_obj_state(struct drm_atomic_state *state,
 821				     struct drm_private_obj *obj)
 822{
 823	int i;
 824
 825	for (i = 0; i < state->num_private_objs; i++)
 826		if (obj == state->private_objs[i].ptr)
 827			return state->private_objs[i].old_state;
 828
 829	return NULL;
 830}
 831EXPORT_SYMBOL(drm_atomic_get_old_private_obj_state);
 832
 833/**
 834 * drm_atomic_get_new_private_obj_state
 835 * @state: global atomic state object
 836 * @obj: private_obj to grab
 837 *
 838 * This function returns the new private object state for the given private_obj,
 839 * or NULL if the private_obj is not part of the global atomic state.
 840 */
 841struct drm_private_state *
 842drm_atomic_get_new_private_obj_state(struct drm_atomic_state *state,
 843				     struct drm_private_obj *obj)
 844{
 845	int i;
 846
 847	for (i = 0; i < state->num_private_objs; i++)
 848		if (obj == state->private_objs[i].ptr)
 849			return state->private_objs[i].new_state;
 850
 851	return NULL;
 852}
 853EXPORT_SYMBOL(drm_atomic_get_new_private_obj_state);
 854
 855/**
 856 * drm_atomic_get_old_connector_for_encoder - Get old connector for an encoder
 857 * @state: Atomic state
 858 * @encoder: The encoder to fetch the connector state for
 859 *
 860 * This function finds and returns the connector that was connected to @encoder
 861 * as specified by the @state.
 862 *
 863 * If there is no connector in @state which previously had @encoder connected to
 864 * it, this function will return NULL. While this may seem like an invalid use
 865 * case, it is sometimes useful to differentiate commits which had no prior
 866 * connectors attached to @encoder vs ones that did (and to inspect their
 867 * state). This is especially true in enable hooks because the pipeline has
 868 * changed.
 869 *
 870 * Returns: The old connector connected to @encoder, or NULL if the encoder is
 871 * not connected.
 872 */
 873struct drm_connector *
 874drm_atomic_get_old_connector_for_encoder(struct drm_atomic_state *state,
 875					 struct drm_encoder *encoder)
 876{
 877	struct drm_connector_state *conn_state;
 878	struct drm_connector *connector;
 879	unsigned int i;
 880
 881	for_each_old_connector_in_state(state, connector, conn_state, i) {
 882		if (conn_state->best_encoder == encoder)
 883			return connector;
 884	}
 885
 886	return NULL;
 887}
 888EXPORT_SYMBOL(drm_atomic_get_old_connector_for_encoder);
 889
 890/**
 891 * drm_atomic_get_new_connector_for_encoder - Get new connector for an encoder
 892 * @state: Atomic state
 893 * @encoder: The encoder to fetch the connector state for
 894 *
 895 * This function finds and returns the connector that will be connected to
 896 * @encoder as specified by the @state.
 897 *
 898 * If there is no connector in @state which will have @encoder connected to it,
 899 * this function will return NULL. While this may seem like an invalid use case,
 900 * it is sometimes useful to differentiate commits which have no connectors
 901 * attached to @encoder vs ones that do (and to inspect their state). This is
 902 * especially true in disable hooks because the pipeline will change.
 903 *
 904 * Returns: The new connector connected to @encoder, or NULL if the encoder is
 905 * not connected.
 906 */
 907struct drm_connector *
 908drm_atomic_get_new_connector_for_encoder(struct drm_atomic_state *state,
 909					 struct drm_encoder *encoder)
 910{
 911	struct drm_connector_state *conn_state;
 912	struct drm_connector *connector;
 913	unsigned int i;
 914
 915	for_each_new_connector_in_state(state, connector, conn_state, i) {
 916		if (conn_state->best_encoder == encoder)
 917			return connector;
 918	}
 919
 920	return NULL;
 921}
 922EXPORT_SYMBOL(drm_atomic_get_new_connector_for_encoder);
 923
 924/**
 925 * drm_atomic_get_connector_state - get connector state
 926 * @state: global atomic state object
 927 * @connector: connector to get state object for
 928 *
 929 * This function returns the connector state for the given connector,
 930 * allocating it if needed. It will also grab the relevant connector lock to
 931 * make sure that the state is consistent.
 932 *
 933 * Returns:
 934 *
 935 * Either the allocated state or the error code encoded into the pointer. When
 936 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
 937 * entire atomic sequence must be restarted. All other errors are fatal.
 938 */
 939struct drm_connector_state *
 940drm_atomic_get_connector_state(struct drm_atomic_state *state,
 941			  struct drm_connector *connector)
 942{
 943	int ret, index;
 944	struct drm_mode_config *config = &connector->dev->mode_config;
 945	struct drm_connector_state *connector_state;
 946
 947	WARN_ON(!state->acquire_ctx);
 948
 949	ret = drm_modeset_lock(&config->connection_mutex, state->acquire_ctx);
 950	if (ret)
 951		return ERR_PTR(ret);
 952
 953	index = drm_connector_index(connector);
 954
 955	if (index >= state->num_connector) {
 956		struct __drm_connnectors_state *c;
 957		int alloc = max(index + 1, config->num_connector);
 958
 959		c = krealloc(state->connectors, alloc * sizeof(*state->connectors), GFP_KERNEL);
 
 960		if (!c)
 961			return ERR_PTR(-ENOMEM);
 962
 963		state->connectors = c;
 964		memset(&state->connectors[state->num_connector], 0,
 965		       sizeof(*state->connectors) * (alloc - state->num_connector));
 966
 967		state->num_connector = alloc;
 968	}
 969
 970	if (state->connectors[index].state)
 971		return state->connectors[index].state;
 972
 973	connector_state = connector->funcs->atomic_duplicate_state(connector);
 974	if (!connector_state)
 975		return ERR_PTR(-ENOMEM);
 976
 977	drm_connector_get(connector);
 978	state->connectors[index].state = connector_state;
 979	state->connectors[index].old_state = connector->state;
 980	state->connectors[index].new_state = connector_state;
 981	state->connectors[index].ptr = connector;
 982	connector_state->state = state;
 983
 984	DRM_DEBUG_ATOMIC("Added [CONNECTOR:%d:%s] %p state to %p\n",
 985			 connector->base.id, connector->name,
 986			 connector_state, state);
 987
 988	if (connector_state->crtc) {
 989		struct drm_crtc_state *crtc_state;
 990
 991		crtc_state = drm_atomic_get_crtc_state(state,
 992						       connector_state->crtc);
 993		if (IS_ERR(crtc_state))
 994			return ERR_CAST(crtc_state);
 995	}
 996
 997	return connector_state;
 998}
 999EXPORT_SYMBOL(drm_atomic_get_connector_state);
1000
1001static void drm_atomic_connector_print_state(struct drm_printer *p,
1002		const struct drm_connector_state *state)
1003{
1004	struct drm_connector *connector = state->connector;
1005
1006	drm_printf(p, "connector[%u]: %s\n", connector->base.id, connector->name);
1007	drm_printf(p, "\tcrtc=%s\n", state->crtc ? state->crtc->name : "(null)");
1008	drm_printf(p, "\tself_refresh_aware=%d\n", state->self_refresh_aware);
1009
1010	if (connector->connector_type == DRM_MODE_CONNECTOR_WRITEBACK)
1011		if (state->writeback_job && state->writeback_job->fb)
1012			drm_printf(p, "\tfb=%d\n", state->writeback_job->fb->base.id);
1013
1014	if (connector->funcs->atomic_print_state)
1015		connector->funcs->atomic_print_state(p, state);
1016}
1017
1018/**
1019 * drm_atomic_add_affected_connectors - add connectors for crtc
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1020 * @state: atomic state
1021 * @crtc: DRM crtc
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1022 *
1023 * This function walks the current configuration and adds all connectors
1024 * currently using @crtc to the atomic configuration @state. Note that this
1025 * function must acquire the connection mutex. This can potentially cause
1026 * unneeded seralization if the update is just for the planes on one crtc. Hence
1027 * drivers and helpers should only call this when really needed (e.g. when a
1028 * full modeset needs to happen due to some change).
1029 *
1030 * Returns:
1031 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1032 * then the w/w mutex code has detected a deadlock and the entire atomic
1033 * sequence must be restarted. All other errors are fatal.
1034 */
1035int
1036drm_atomic_add_affected_connectors(struct drm_atomic_state *state,
1037				   struct drm_crtc *crtc)
1038{
1039	struct drm_mode_config *config = &state->dev->mode_config;
1040	struct drm_connector *connector;
1041	struct drm_connector_state *conn_state;
1042	struct drm_connector_list_iter conn_iter;
1043	struct drm_crtc_state *crtc_state;
1044	int ret;
1045
1046	crtc_state = drm_atomic_get_crtc_state(state, crtc);
1047	if (IS_ERR(crtc_state))
1048		return PTR_ERR(crtc_state);
1049
1050	ret = drm_modeset_lock(&config->connection_mutex, state->acquire_ctx);
1051	if (ret)
1052		return ret;
1053
1054	DRM_DEBUG_ATOMIC("Adding all current connectors for [CRTC:%d:%s] to %p\n",
1055			 crtc->base.id, crtc->name, state);
 
1056
1057	/*
1058	 * Changed connectors are already in @state, so only need to look
1059	 * at the connector_mask in crtc_state.
1060	 */
1061	drm_connector_list_iter_begin(state->dev, &conn_iter);
1062	drm_for_each_connector_iter(connector, &conn_iter) {
1063		if (!(crtc_state->connector_mask & drm_connector_mask(connector)))
1064			continue;
1065
1066		conn_state = drm_atomic_get_connector_state(state, connector);
1067		if (IS_ERR(conn_state)) {
1068			drm_connector_list_iter_end(&conn_iter);
1069			return PTR_ERR(conn_state);
1070		}
1071	}
1072	drm_connector_list_iter_end(&conn_iter);
1073
1074	return 0;
1075}
1076EXPORT_SYMBOL(drm_atomic_add_affected_connectors);
1077
1078/**
1079 * drm_atomic_add_affected_planes - add planes for crtc
1080 * @state: atomic state
1081 * @crtc: DRM crtc
1082 *
1083 * This function walks the current configuration and adds all planes
1084 * currently used by @crtc to the atomic configuration @state. This is useful
1085 * when an atomic commit also needs to check all currently enabled plane on
1086 * @crtc, e.g. when changing the mode. It's also useful when re-enabling a CRTC
1087 * to avoid special code to force-enable all planes.
1088 *
1089 * Since acquiring a plane state will always also acquire the w/w mutex of the
1090 * current CRTC for that plane (if there is any) adding all the plane states for
1091 * a CRTC will not reduce parallism of atomic updates.
1092 *
1093 * Returns:
1094 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1095 * then the w/w mutex code has detected a deadlock and the entire atomic
1096 * sequence must be restarted. All other errors are fatal.
1097 */
1098int
1099drm_atomic_add_affected_planes(struct drm_atomic_state *state,
1100			       struct drm_crtc *crtc)
1101{
1102	const struct drm_crtc_state *old_crtc_state =
1103		drm_atomic_get_old_crtc_state(state, crtc);
1104	struct drm_plane *plane;
1105
1106	WARN_ON(!drm_atomic_get_new_crtc_state(state, crtc));
1107
1108	DRM_DEBUG_ATOMIC("Adding all current planes for [CRTC:%d:%s] to %p\n",
1109			 crtc->base.id, crtc->name, state);
 
1110
1111	drm_for_each_plane_mask(plane, state->dev, old_crtc_state->plane_mask) {
1112		struct drm_plane_state *plane_state =
1113			drm_atomic_get_plane_state(state, plane);
1114
1115		if (IS_ERR(plane_state))
1116			return PTR_ERR(plane_state);
1117	}
1118	return 0;
1119}
1120EXPORT_SYMBOL(drm_atomic_add_affected_planes);
1121
1122/**
1123 * drm_atomic_check_only - check whether a given config would work
1124 * @state: atomic configuration to check
1125 *
1126 * Note that this function can return -EDEADLK if the driver needed to acquire
1127 * more locks but encountered a deadlock. The caller must then do the usual w/w
1128 * backoff dance and restart. All other errors are fatal.
1129 *
1130 * Returns:
1131 * 0 on success, negative error code on failure.
1132 */
1133int drm_atomic_check_only(struct drm_atomic_state *state)
1134{
1135	struct drm_device *dev = state->dev;
1136	struct drm_mode_config *config = &dev->mode_config;
1137	struct drm_plane *plane;
1138	struct drm_plane_state *old_plane_state;
1139	struct drm_plane_state *new_plane_state;
1140	struct drm_crtc *crtc;
1141	struct drm_crtc_state *old_crtc_state;
1142	struct drm_crtc_state *new_crtc_state;
1143	struct drm_connector *conn;
1144	struct drm_connector_state *conn_state;
 
 
1145	int i, ret = 0;
1146
1147	DRM_DEBUG_ATOMIC("checking %p\n", state);
 
 
 
 
 
1148
1149	for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) {
1150		ret = drm_atomic_plane_check(old_plane_state, new_plane_state);
1151		if (ret) {
1152			DRM_DEBUG_ATOMIC("[PLANE:%d:%s] atomic core check failed\n",
1153					 plane->base.id, plane->name);
1154			return ret;
1155		}
1156	}
1157
1158	for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
1159		ret = drm_atomic_crtc_check(old_crtc_state, new_crtc_state);
1160		if (ret) {
1161			DRM_DEBUG_ATOMIC("[CRTC:%d:%s] atomic core check failed\n",
1162					 crtc->base.id, crtc->name);
1163			return ret;
1164		}
1165	}
1166
1167	for_each_new_connector_in_state(state, conn, conn_state, i) {
1168		ret = drm_atomic_connector_check(conn, conn_state);
1169		if (ret) {
1170			DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] atomic core check failed\n",
1171					 conn->base.id, conn->name);
1172			return ret;
1173		}
1174	}
1175
1176	if (config->funcs->atomic_check) {
1177		ret = config->funcs->atomic_check(state->dev, state);
1178
1179		if (ret) {
1180			DRM_DEBUG_ATOMIC("atomic driver check for %p failed: %d\n",
1181					 state, ret);
1182			return ret;
1183		}
1184	}
1185
1186	if (!state->allow_modeset) {
1187		for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
1188			if (drm_atomic_crtc_needs_modeset(new_crtc_state)) {
1189				DRM_DEBUG_ATOMIC("[CRTC:%d:%s] requires full modeset\n",
1190						 crtc->base.id, crtc->name);
1191				return -EINVAL;
1192			}
1193		}
1194	}
1195
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1196	return 0;
1197}
1198EXPORT_SYMBOL(drm_atomic_check_only);
1199
1200/**
1201 * drm_atomic_commit - commit configuration atomically
1202 * @state: atomic configuration to check
1203 *
1204 * Note that this function can return -EDEADLK if the driver needed to acquire
1205 * more locks but encountered a deadlock. The caller must then do the usual w/w
1206 * backoff dance and restart. All other errors are fatal.
1207 *
1208 * This function will take its own reference on @state.
1209 * Callers should always release their reference with drm_atomic_state_put().
1210 *
1211 * Returns:
1212 * 0 on success, negative error code on failure.
1213 */
1214int drm_atomic_commit(struct drm_atomic_state *state)
1215{
1216	struct drm_mode_config *config = &state->dev->mode_config;
 
1217	int ret;
1218
 
 
 
1219	ret = drm_atomic_check_only(state);
1220	if (ret)
1221		return ret;
1222
1223	DRM_DEBUG_ATOMIC("committing %p\n", state);
1224
1225	return config->funcs->atomic_commit(state->dev, state, false);
1226}
1227EXPORT_SYMBOL(drm_atomic_commit);
1228
1229/**
1230 * drm_atomic_nonblocking_commit - atomic nonblocking commit
1231 * @state: atomic configuration to check
1232 *
1233 * Note that this function can return -EDEADLK if the driver needed to acquire
1234 * more locks but encountered a deadlock. The caller must then do the usual w/w
1235 * backoff dance and restart. All other errors are fatal.
1236 *
1237 * This function will take its own reference on @state.
1238 * Callers should always release their reference with drm_atomic_state_put().
1239 *
1240 * Returns:
1241 * 0 on success, negative error code on failure.
1242 */
1243int drm_atomic_nonblocking_commit(struct drm_atomic_state *state)
1244{
1245	struct drm_mode_config *config = &state->dev->mode_config;
1246	int ret;
1247
1248	ret = drm_atomic_check_only(state);
1249	if (ret)
1250		return ret;
1251
1252	DRM_DEBUG_ATOMIC("committing %p nonblocking\n", state);
1253
1254	return config->funcs->atomic_commit(state->dev, state, true);
1255}
1256EXPORT_SYMBOL(drm_atomic_nonblocking_commit);
1257
1258/* just used from drm-client and atomic-helper: */
1259int __drm_atomic_helper_disable_plane(struct drm_plane *plane,
1260				      struct drm_plane_state *plane_state)
1261{
1262	int ret;
1263
1264	ret = drm_atomic_set_crtc_for_plane(plane_state, NULL);
1265	if (ret != 0)
1266		return ret;
1267
1268	drm_atomic_set_fb_for_plane(plane_state, NULL);
1269	plane_state->crtc_x = 0;
1270	plane_state->crtc_y = 0;
1271	plane_state->crtc_w = 0;
1272	plane_state->crtc_h = 0;
1273	plane_state->src_x = 0;
1274	plane_state->src_y = 0;
1275	plane_state->src_w = 0;
1276	plane_state->src_h = 0;
1277
1278	return 0;
1279}
1280EXPORT_SYMBOL(__drm_atomic_helper_disable_plane);
1281
1282static int update_output_state(struct drm_atomic_state *state,
1283			       struct drm_mode_set *set)
1284{
1285	struct drm_device *dev = set->crtc->dev;
1286	struct drm_crtc *crtc;
1287	struct drm_crtc_state *new_crtc_state;
1288	struct drm_connector *connector;
1289	struct drm_connector_state *new_conn_state;
1290	int ret, i;
1291
1292	ret = drm_modeset_lock(&dev->mode_config.connection_mutex,
1293			       state->acquire_ctx);
1294	if (ret)
1295		return ret;
1296
1297	/* First disable all connectors on the target crtc. */
1298	ret = drm_atomic_add_affected_connectors(state, set->crtc);
1299	if (ret)
1300		return ret;
1301
1302	for_each_new_connector_in_state(state, connector, new_conn_state, i) {
1303		if (new_conn_state->crtc == set->crtc) {
1304			ret = drm_atomic_set_crtc_for_connector(new_conn_state,
1305								NULL);
1306			if (ret)
1307				return ret;
1308
1309			/* Make sure legacy setCrtc always re-trains */
1310			new_conn_state->link_status = DRM_LINK_STATUS_GOOD;
1311		}
1312	}
1313
1314	/* Then set all connectors from set->connectors on the target crtc */
1315	for (i = 0; i < set->num_connectors; i++) {
1316		new_conn_state = drm_atomic_get_connector_state(state,
1317								set->connectors[i]);
1318		if (IS_ERR(new_conn_state))
1319			return PTR_ERR(new_conn_state);
1320
1321		ret = drm_atomic_set_crtc_for_connector(new_conn_state,
1322							set->crtc);
1323		if (ret)
1324			return ret;
1325	}
1326
1327	for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
1328		/*
1329		 * Don't update ->enable for the CRTC in the set_config request,
1330		 * since a mismatch would indicate a bug in the upper layers.
1331		 * The actual modeset code later on will catch any
1332		 * inconsistencies here.
1333		 */
1334		if (crtc == set->crtc)
1335			continue;
1336
1337		if (!new_crtc_state->connector_mask) {
1338			ret = drm_atomic_set_mode_prop_for_crtc(new_crtc_state,
1339								NULL);
1340			if (ret < 0)
1341				return ret;
1342
1343			new_crtc_state->active = false;
1344		}
1345	}
1346
1347	return 0;
1348}
1349
1350/* just used from drm-client and atomic-helper: */
1351int __drm_atomic_helper_set_config(struct drm_mode_set *set,
1352				   struct drm_atomic_state *state)
1353{
1354	struct drm_crtc_state *crtc_state;
1355	struct drm_plane_state *primary_state;
1356	struct drm_crtc *crtc = set->crtc;
1357	int hdisplay, vdisplay;
1358	int ret;
1359
1360	crtc_state = drm_atomic_get_crtc_state(state, crtc);
1361	if (IS_ERR(crtc_state))
1362		return PTR_ERR(crtc_state);
1363
1364	primary_state = drm_atomic_get_plane_state(state, crtc->primary);
1365	if (IS_ERR(primary_state))
1366		return PTR_ERR(primary_state);
1367
1368	if (!set->mode) {
1369		WARN_ON(set->fb);
1370		WARN_ON(set->num_connectors);
1371
1372		ret = drm_atomic_set_mode_for_crtc(crtc_state, NULL);
1373		if (ret != 0)
1374			return ret;
1375
1376		crtc_state->active = false;
1377
1378		ret = drm_atomic_set_crtc_for_plane(primary_state, NULL);
1379		if (ret != 0)
1380			return ret;
1381
1382		drm_atomic_set_fb_for_plane(primary_state, NULL);
1383
1384		goto commit;
1385	}
1386
1387	WARN_ON(!set->fb);
1388	WARN_ON(!set->num_connectors);
1389
1390	ret = drm_atomic_set_mode_for_crtc(crtc_state, set->mode);
1391	if (ret != 0)
1392		return ret;
1393
1394	crtc_state->active = true;
1395
1396	ret = drm_atomic_set_crtc_for_plane(primary_state, crtc);
1397	if (ret != 0)
1398		return ret;
1399
1400	drm_mode_get_hv_timing(set->mode, &hdisplay, &vdisplay);
1401
1402	drm_atomic_set_fb_for_plane(primary_state, set->fb);
1403	primary_state->crtc_x = 0;
1404	primary_state->crtc_y = 0;
1405	primary_state->crtc_w = hdisplay;
1406	primary_state->crtc_h = vdisplay;
1407	primary_state->src_x = set->x << 16;
1408	primary_state->src_y = set->y << 16;
1409	if (drm_rotation_90_or_270(primary_state->rotation)) {
1410		primary_state->src_w = vdisplay << 16;
1411		primary_state->src_h = hdisplay << 16;
1412	} else {
1413		primary_state->src_w = hdisplay << 16;
1414		primary_state->src_h = vdisplay << 16;
1415	}
1416
1417commit:
1418	ret = update_output_state(state, set);
1419	if (ret)
1420		return ret;
1421
1422	return 0;
1423}
1424EXPORT_SYMBOL(__drm_atomic_helper_set_config);
1425
1426void drm_atomic_print_state(const struct drm_atomic_state *state)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1427{
1428	struct drm_printer p = drm_info_printer(state->dev->dev);
1429	struct drm_plane *plane;
1430	struct drm_plane_state *plane_state;
1431	struct drm_crtc *crtc;
1432	struct drm_crtc_state *crtc_state;
1433	struct drm_connector *connector;
1434	struct drm_connector_state *connector_state;
 
 
1435	int i;
1436
1437	DRM_DEBUG_ATOMIC("checking %p\n", state);
 
 
 
 
 
1438
1439	for_each_new_plane_in_state(state, plane, plane_state, i)
1440		drm_atomic_plane_print_state(&p, plane_state);
1441
1442	for_each_new_crtc_in_state(state, crtc, crtc_state, i)
1443		drm_atomic_crtc_print_state(&p, crtc_state);
1444
1445	for_each_new_connector_in_state(state, connector, connector_state, i)
1446		drm_atomic_connector_print_state(&p, connector_state);
 
 
 
1447}
 
1448
1449static void __drm_state_dump(struct drm_device *dev, struct drm_printer *p,
1450			     bool take_locks)
1451{
1452	struct drm_mode_config *config = &dev->mode_config;
1453	struct drm_plane *plane;
1454	struct drm_crtc *crtc;
1455	struct drm_connector *connector;
1456	struct drm_connector_list_iter conn_iter;
1457
1458	if (!drm_drv_uses_atomic_modeset(dev))
1459		return;
1460
1461	list_for_each_entry(plane, &config->plane_list, head) {
1462		if (take_locks)
1463			drm_modeset_lock(&plane->mutex, NULL);
1464		drm_atomic_plane_print_state(p, plane->state);
1465		if (take_locks)
1466			drm_modeset_unlock(&plane->mutex);
1467	}
1468
1469	list_for_each_entry(crtc, &config->crtc_list, head) {
1470		if (take_locks)
1471			drm_modeset_lock(&crtc->mutex, NULL);
1472		drm_atomic_crtc_print_state(p, crtc->state);
1473		if (take_locks)
1474			drm_modeset_unlock(&crtc->mutex);
1475	}
1476
1477	drm_connector_list_iter_begin(dev, &conn_iter);
1478	if (take_locks)
1479		drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
1480	drm_for_each_connector_iter(connector, &conn_iter)
1481		drm_atomic_connector_print_state(p, connector->state);
1482	if (take_locks)
1483		drm_modeset_unlock(&dev->mode_config.connection_mutex);
1484	drm_connector_list_iter_end(&conn_iter);
1485}
1486
1487/**
1488 * drm_state_dump - dump entire device atomic state
1489 * @dev: the drm device
1490 * @p: where to print the state to
1491 *
1492 * Just for debugging.  Drivers might want an option to dump state
1493 * to dmesg in case of error irq's.  (Hint, you probably want to
1494 * ratelimit this!)
1495 *
1496 * The caller must drm_modeset_lock_all(), or if this is called
1497 * from error irq handler, it should not be enabled by default.
1498 * (Ie. if you are debugging errors you might not care that this
1499 * is racey.  But calling this without all modeset locks held is
1500 * not inherently safe.)
1501 */
1502void drm_state_dump(struct drm_device *dev, struct drm_printer *p)
1503{
1504	__drm_state_dump(dev, p, false);
1505}
1506EXPORT_SYMBOL(drm_state_dump);
1507
1508#ifdef CONFIG_DEBUG_FS
1509static int drm_state_info(struct seq_file *m, void *data)
1510{
1511	struct drm_info_node *node = (struct drm_info_node *) m->private;
1512	struct drm_device *dev = node->minor->dev;
1513	struct drm_printer p = drm_seq_file_printer(m);
1514
1515	__drm_state_dump(dev, &p, true);
1516
1517	return 0;
1518}
1519
1520/* any use in debugfs files to dump individual planes/crtc/etc? */
1521static const struct drm_info_list drm_atomic_debugfs_list[] = {
1522	{"state", drm_state_info, 0},
1523};
1524
1525int drm_atomic_debugfs_init(struct drm_minor *minor)
1526{
1527	return drm_debugfs_create_files(drm_atomic_debugfs_list,
1528			ARRAY_SIZE(drm_atomic_debugfs_list),
1529			minor->debugfs_root, minor);
1530}
1531#endif