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   1// SPDX-License-Identifier: MIT
   2/*
   3 * Copyright © 2022 Intel Corporation
   4 *
   5 * Read out the current hardware modeset state, and sanitize it to the current
   6 * state.
   7 */
   8
   9#include <drm/drm_atomic_uapi.h>
  10#include <drm/drm_atomic_state_helper.h>
  11#include <drm/drm_vblank.h>
  12
  13#include "i915_drv.h"
  14#include "i915_reg.h"
  15#include "i9xx_wm.h"
  16#include "intel_atomic.h"
  17#include "intel_bw.h"
  18#include "intel_color.h"
  19#include "intel_crtc.h"
  20#include "intel_crtc_state_dump.h"
  21#include "intel_ddi.h"
  22#include "intel_de.h"
  23#include "intel_display.h"
  24#include "intel_display_power.h"
  25#include "intel_display_types.h"
  26#include "intel_dmc.h"
  27#include "intel_fifo_underrun.h"
  28#include "intel_modeset_setup.h"
  29#include "intel_pch_display.h"
  30#include "intel_pmdemand.h"
  31#include "intel_tc.h"
  32#include "intel_vblank.h"
  33#include "intel_wm.h"
  34#include "skl_watermark.h"
  35
  36static void intel_crtc_disable_noatomic_begin(struct intel_crtc *crtc,
  37					      struct drm_modeset_acquire_ctx *ctx)
  38{
  39	struct drm_i915_private *i915 = to_i915(crtc->base.dev);
  40	struct intel_crtc_state *crtc_state =
  41		to_intel_crtc_state(crtc->base.state);
  42	struct intel_plane *plane;
  43	struct drm_atomic_state *state;
  44	struct intel_crtc *temp_crtc;
  45	enum pipe pipe = crtc->pipe;
  46
  47	if (!crtc_state->hw.active)
  48		return;
  49
  50	for_each_intel_plane_on_crtc(&i915->drm, crtc, plane) {
  51		const struct intel_plane_state *plane_state =
  52			to_intel_plane_state(plane->base.state);
  53
  54		if (plane_state->uapi.visible)
  55			intel_plane_disable_noatomic(crtc, plane);
  56	}
  57
  58	state = drm_atomic_state_alloc(&i915->drm);
  59	if (!state) {
  60		drm_dbg_kms(&i915->drm,
  61			    "failed to disable [CRTC:%d:%s], out of memory",
  62			    crtc->base.base.id, crtc->base.name);
  63		return;
  64	}
  65
  66	state->acquire_ctx = ctx;
  67	to_intel_atomic_state(state)->internal = true;
  68
  69	/* Everything's already locked, -EDEADLK can't happen. */
  70	for_each_intel_crtc_in_pipe_mask(&i915->drm, temp_crtc,
  71					 BIT(pipe) |
  72					 intel_crtc_joiner_secondary_pipes(crtc_state)) {
  73		struct intel_crtc_state *temp_crtc_state =
  74			intel_atomic_get_crtc_state(state, temp_crtc);
  75		int ret;
  76
  77		ret = drm_atomic_add_affected_connectors(state, &temp_crtc->base);
  78
  79		drm_WARN_ON(&i915->drm, IS_ERR(temp_crtc_state) || ret);
  80	}
  81
  82	i915->display.funcs.display->crtc_disable(to_intel_atomic_state(state), crtc);
  83
  84	drm_atomic_state_put(state);
  85
  86	drm_dbg_kms(&i915->drm,
  87		    "[CRTC:%d:%s] hw state adjusted, was enabled, now disabled\n",
  88		    crtc->base.base.id, crtc->base.name);
  89
  90	crtc->active = false;
  91	crtc->base.enabled = false;
  92
  93	if (crtc_state->shared_dpll)
  94		intel_unreference_shared_dpll_crtc(crtc,
  95						   crtc_state->shared_dpll,
  96						   &crtc_state->shared_dpll->state);
  97}
  98
  99static void set_encoder_for_connector(struct intel_connector *connector,
 100				      struct intel_encoder *encoder)
 101{
 102	struct drm_connector_state *conn_state = connector->base.state;
 103
 104	if (conn_state->crtc)
 105		drm_connector_put(&connector->base);
 106
 107	if (encoder) {
 108		conn_state->best_encoder = &encoder->base;
 109		conn_state->crtc = encoder->base.crtc;
 110		drm_connector_get(&connector->base);
 111	} else {
 112		conn_state->best_encoder = NULL;
 113		conn_state->crtc = NULL;
 114	}
 115}
 116
 117static void reset_encoder_connector_state(struct intel_encoder *encoder)
 118{
 119	struct drm_i915_private *i915 = to_i915(encoder->base.dev);
 120	struct intel_pmdemand_state *pmdemand_state =
 121		to_intel_pmdemand_state(i915->display.pmdemand.obj.state);
 122	struct intel_connector *connector;
 123	struct drm_connector_list_iter conn_iter;
 124
 125	drm_connector_list_iter_begin(&i915->drm, &conn_iter);
 126	for_each_intel_connector_iter(connector, &conn_iter) {
 127		if (connector->base.encoder != &encoder->base)
 128			continue;
 129
 130		/* Clear the corresponding bit in pmdemand active phys mask */
 131		intel_pmdemand_update_phys_mask(i915, encoder,
 132						pmdemand_state, false);
 133
 134		set_encoder_for_connector(connector, NULL);
 135
 136		connector->base.dpms = DRM_MODE_DPMS_OFF;
 137		connector->base.encoder = NULL;
 138	}
 139	drm_connector_list_iter_end(&conn_iter);
 140}
 141
 142static void reset_crtc_encoder_state(struct intel_crtc *crtc)
 143{
 144	struct drm_i915_private *i915 = to_i915(crtc->base.dev);
 145	struct intel_encoder *encoder;
 146
 147	for_each_encoder_on_crtc(&i915->drm, &crtc->base, encoder) {
 148		reset_encoder_connector_state(encoder);
 149		encoder->base.crtc = NULL;
 150	}
 151}
 152
 153static void intel_crtc_disable_noatomic_complete(struct intel_crtc *crtc)
 154{
 155	struct drm_i915_private *i915 = to_i915(crtc->base.dev);
 156	struct intel_bw_state *bw_state =
 157		to_intel_bw_state(i915->display.bw.obj.state);
 158	struct intel_cdclk_state *cdclk_state =
 159		to_intel_cdclk_state(i915->display.cdclk.obj.state);
 160	struct intel_dbuf_state *dbuf_state =
 161		to_intel_dbuf_state(i915->display.dbuf.obj.state);
 162	struct intel_pmdemand_state *pmdemand_state =
 163		to_intel_pmdemand_state(i915->display.pmdemand.obj.state);
 164	struct intel_crtc_state *crtc_state =
 165		to_intel_crtc_state(crtc->base.state);
 166	enum pipe pipe = crtc->pipe;
 167
 168	__drm_atomic_helper_crtc_destroy_state(&crtc_state->uapi);
 169	intel_crtc_free_hw_state(crtc_state);
 170	intel_crtc_state_reset(crtc_state, crtc);
 171
 172	reset_crtc_encoder_state(crtc);
 173
 174	intel_fbc_disable(crtc);
 175	intel_update_watermarks(i915);
 176
 177	intel_display_power_put_all_in_set(i915, &crtc->enabled_power_domains);
 178
 179	cdclk_state->min_cdclk[pipe] = 0;
 180	cdclk_state->min_voltage_level[pipe] = 0;
 181	cdclk_state->active_pipes &= ~BIT(pipe);
 182
 183	dbuf_state->active_pipes &= ~BIT(pipe);
 184
 185	bw_state->data_rate[pipe] = 0;
 186	bw_state->num_active_planes[pipe] = 0;
 187
 188	intel_pmdemand_update_port_clock(i915, pmdemand_state, pipe, 0);
 189}
 190
 191/*
 192 * Return all the pipes using a transcoder in @transcoder_mask.
 193 * For joiner configs return only the joiner primary.
 194 */
 195static u8 get_transcoder_pipes(struct drm_i915_private *i915,
 196			       u8 transcoder_mask)
 197{
 198	struct intel_crtc *temp_crtc;
 199	u8 pipes = 0;
 200
 201	for_each_intel_crtc(&i915->drm, temp_crtc) {
 202		struct intel_crtc_state *temp_crtc_state =
 203			to_intel_crtc_state(temp_crtc->base.state);
 204
 205		if (temp_crtc_state->cpu_transcoder == INVALID_TRANSCODER)
 206			continue;
 207
 208		if (intel_crtc_is_joiner_secondary(temp_crtc_state))
 209			continue;
 210
 211		if (transcoder_mask & BIT(temp_crtc_state->cpu_transcoder))
 212			pipes |= BIT(temp_crtc->pipe);
 213	}
 214
 215	return pipes;
 216}
 217
 218/*
 219 * Return the port sync master and slave pipes linked to @crtc.
 220 * For joiner configs return only the joiner primary pipes.
 221 */
 222static void get_portsync_pipes(struct intel_crtc *crtc,
 223			       u8 *master_pipe_mask, u8 *slave_pipes_mask)
 224{
 225	struct intel_display *display = to_intel_display(crtc);
 226	struct drm_i915_private *i915 = to_i915(crtc->base.dev);
 227	struct intel_crtc_state *crtc_state =
 228		to_intel_crtc_state(crtc->base.state);
 229	struct intel_crtc *master_crtc;
 230	struct intel_crtc_state *master_crtc_state;
 231	enum transcoder master_transcoder;
 232
 233	if (!is_trans_port_sync_mode(crtc_state)) {
 234		*master_pipe_mask = BIT(crtc->pipe);
 235		*slave_pipes_mask = 0;
 236
 237		return;
 238	}
 239
 240	if (is_trans_port_sync_master(crtc_state))
 241		master_transcoder = crtc_state->cpu_transcoder;
 242	else
 243		master_transcoder = crtc_state->master_transcoder;
 244
 245	*master_pipe_mask = get_transcoder_pipes(i915, BIT(master_transcoder));
 246	drm_WARN_ON(&i915->drm, !is_power_of_2(*master_pipe_mask));
 247
 248	master_crtc = intel_crtc_for_pipe(display, ffs(*master_pipe_mask) - 1);
 249	master_crtc_state = to_intel_crtc_state(master_crtc->base.state);
 250	*slave_pipes_mask = get_transcoder_pipes(i915, master_crtc_state->sync_mode_slaves_mask);
 251}
 252
 253static u8 get_joiner_secondary_pipes(struct drm_i915_private *i915, u8 primary_pipes_mask)
 254{
 255	struct intel_crtc *primary_crtc;
 256	u8 pipes = 0;
 257
 258	for_each_intel_crtc_in_pipe_mask(&i915->drm, primary_crtc, primary_pipes_mask) {
 259		struct intel_crtc_state *primary_crtc_state =
 260			to_intel_crtc_state(primary_crtc->base.state);
 261
 262		pipes |= intel_crtc_joiner_secondary_pipes(primary_crtc_state);
 263	}
 264
 265	return pipes;
 266}
 267
 268static void intel_crtc_disable_noatomic(struct intel_crtc *crtc,
 269					struct drm_modeset_acquire_ctx *ctx)
 270{
 271	struct drm_i915_private *i915 = to_i915(crtc->base.dev);
 272	u8 portsync_master_mask;
 273	u8 portsync_slaves_mask;
 274	u8 joiner_secondaries_mask;
 275	struct intel_crtc *temp_crtc;
 276
 277	/* TODO: Add support for MST */
 278	get_portsync_pipes(crtc, &portsync_master_mask, &portsync_slaves_mask);
 279	joiner_secondaries_mask = get_joiner_secondary_pipes(i915,
 280							     portsync_master_mask |
 281							     portsync_slaves_mask);
 282
 283	drm_WARN_ON(&i915->drm,
 284		    portsync_master_mask & portsync_slaves_mask ||
 285		    portsync_master_mask & joiner_secondaries_mask ||
 286		    portsync_slaves_mask & joiner_secondaries_mask);
 287
 288	for_each_intel_crtc_in_pipe_mask(&i915->drm, temp_crtc, joiner_secondaries_mask)
 289		intel_crtc_disable_noatomic_begin(temp_crtc, ctx);
 290
 291	for_each_intel_crtc_in_pipe_mask(&i915->drm, temp_crtc, portsync_slaves_mask)
 292		intel_crtc_disable_noatomic_begin(temp_crtc, ctx);
 293
 294	for_each_intel_crtc_in_pipe_mask(&i915->drm, temp_crtc, portsync_master_mask)
 295		intel_crtc_disable_noatomic_begin(temp_crtc, ctx);
 296
 297	for_each_intel_crtc_in_pipe_mask(&i915->drm, temp_crtc,
 298					 joiner_secondaries_mask |
 299					 portsync_slaves_mask |
 300					 portsync_master_mask)
 301		intel_crtc_disable_noatomic_complete(temp_crtc);
 302}
 303
 304static void intel_modeset_update_connector_atomic_state(struct drm_i915_private *i915)
 305{
 306	struct intel_connector *connector;
 307	struct drm_connector_list_iter conn_iter;
 308
 309	drm_connector_list_iter_begin(&i915->drm, &conn_iter);
 310	for_each_intel_connector_iter(connector, &conn_iter) {
 311		struct drm_connector_state *conn_state = connector->base.state;
 312		struct intel_encoder *encoder =
 313			to_intel_encoder(connector->base.encoder);
 314
 315		set_encoder_for_connector(connector, encoder);
 316
 317		if (encoder) {
 318			struct intel_crtc *crtc =
 319				to_intel_crtc(encoder->base.crtc);
 320			const struct intel_crtc_state *crtc_state =
 321				to_intel_crtc_state(crtc->base.state);
 322
 323			conn_state->max_bpc = (crtc_state->pipe_bpp ?: 24) / 3;
 324		}
 325	}
 326	drm_connector_list_iter_end(&conn_iter);
 327}
 328
 329static void intel_crtc_copy_hw_to_uapi_state(struct intel_crtc_state *crtc_state)
 330{
 331	struct drm_i915_private *i915 = to_i915(crtc_state->uapi.crtc->dev);
 332
 333	if (intel_crtc_is_joiner_secondary(crtc_state))
 334		return;
 335
 336	crtc_state->uapi.enable = crtc_state->hw.enable;
 337	crtc_state->uapi.active = crtc_state->hw.active;
 338	drm_WARN_ON(crtc_state->uapi.crtc->dev,
 339		    drm_atomic_set_mode_for_crtc(&crtc_state->uapi, &crtc_state->hw.mode) < 0);
 340
 341	crtc_state->uapi.adjusted_mode = crtc_state->hw.adjusted_mode;
 342	crtc_state->uapi.scaling_filter = crtc_state->hw.scaling_filter;
 343
 344	if (DISPLAY_INFO(i915)->color.degamma_lut_size) {
 345		/* assume 1:1 mapping */
 346		drm_property_replace_blob(&crtc_state->hw.degamma_lut,
 347					  crtc_state->pre_csc_lut);
 348		drm_property_replace_blob(&crtc_state->hw.gamma_lut,
 349					  crtc_state->post_csc_lut);
 350	} else {
 351		/*
 352		 * ilk/snb hw may be configured for either pre_csc_lut
 353		 * or post_csc_lut, but we don't advertise degamma_lut as
 354		 * being available in the uapi since there is only one
 355		 * hardware LUT. Always assign the result of the readout
 356		 * to gamma_lut as that is the only valid source of LUTs
 357		 * in the uapi.
 358		 */
 359		drm_WARN_ON(&i915->drm, crtc_state->post_csc_lut &&
 360			    crtc_state->pre_csc_lut);
 361
 362		drm_property_replace_blob(&crtc_state->hw.degamma_lut,
 363					  NULL);
 364		drm_property_replace_blob(&crtc_state->hw.gamma_lut,
 365					  crtc_state->post_csc_lut ?:
 366					  crtc_state->pre_csc_lut);
 367	}
 368
 369	drm_property_replace_blob(&crtc_state->uapi.degamma_lut,
 370				  crtc_state->hw.degamma_lut);
 371	drm_property_replace_blob(&crtc_state->uapi.gamma_lut,
 372				  crtc_state->hw.gamma_lut);
 373	drm_property_replace_blob(&crtc_state->uapi.ctm,
 374				  crtc_state->hw.ctm);
 375}
 376
 377static void
 378intel_sanitize_plane_mapping(struct drm_i915_private *i915)
 379{
 380	struct intel_display *display = &i915->display;
 381	struct intel_crtc *crtc;
 382
 383	if (DISPLAY_VER(i915) >= 4)
 384		return;
 385
 386	for_each_intel_crtc(&i915->drm, crtc) {
 387		struct intel_plane *plane =
 388			to_intel_plane(crtc->base.primary);
 389		struct intel_crtc *plane_crtc;
 390		enum pipe pipe;
 391
 392		if (!plane->get_hw_state(plane, &pipe))
 393			continue;
 394
 395		if (pipe == crtc->pipe)
 396			continue;
 397
 398		drm_dbg_kms(&i915->drm,
 399			    "[PLANE:%d:%s] attached to the wrong pipe, disabling plane\n",
 400			    plane->base.base.id, plane->base.name);
 401
 402		plane_crtc = intel_crtc_for_pipe(display, pipe);
 403		intel_plane_disable_noatomic(plane_crtc, plane);
 404	}
 405}
 406
 407static bool intel_crtc_has_encoders(struct intel_crtc *crtc)
 408{
 409	struct drm_device *dev = crtc->base.dev;
 410	struct intel_encoder *encoder;
 411
 412	for_each_encoder_on_crtc(dev, &crtc->base, encoder)
 413		return true;
 414
 415	return false;
 416}
 417
 418static bool intel_crtc_needs_link_reset(struct intel_crtc *crtc)
 419{
 420	struct drm_device *dev = crtc->base.dev;
 421	struct intel_encoder *encoder;
 422
 423	for_each_encoder_on_crtc(dev, &crtc->base, encoder) {
 424		struct intel_digital_port *dig_port = enc_to_dig_port(encoder);
 425
 426		if (dig_port && intel_tc_port_link_needs_reset(dig_port))
 427			return true;
 428	}
 429
 430	return false;
 431}
 432
 433static struct intel_connector *intel_encoder_find_connector(struct intel_encoder *encoder)
 434{
 435	struct drm_i915_private *i915 = to_i915(encoder->base.dev);
 436	struct drm_connector_list_iter conn_iter;
 437	struct intel_connector *connector;
 438	struct intel_connector *found_connector = NULL;
 439
 440	drm_connector_list_iter_begin(&i915->drm, &conn_iter);
 441	for_each_intel_connector_iter(connector, &conn_iter) {
 442		if (&encoder->base == connector->base.encoder) {
 443			found_connector = connector;
 444			break;
 445		}
 446	}
 447	drm_connector_list_iter_end(&conn_iter);
 448
 449	return found_connector;
 450}
 451
 452static void intel_sanitize_fifo_underrun_reporting(const struct intel_crtc_state *crtc_state)
 453{
 454	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
 455	struct drm_i915_private *i915 = to_i915(crtc->base.dev);
 456
 457	/*
 458	 * We start out with underrun reporting disabled on active
 459	 * pipes to avoid races.
 460	 *
 461	 * Also on gmch platforms we dont have any hardware bits to
 462	 * disable the underrun reporting. Which means we need to start
 463	 * out with underrun reporting disabled also on inactive pipes,
 464	 * since otherwise we'll complain about the garbage we read when
 465	 * e.g. coming up after runtime pm.
 466	 *
 467	 * No protection against concurrent access is required - at
 468	 * worst a fifo underrun happens which also sets this to false.
 469	 */
 470	intel_init_fifo_underrun_reporting(i915, crtc,
 471					   !crtc_state->hw.active &&
 472					   !HAS_GMCH(i915));
 473}
 474
 475static bool intel_sanitize_crtc(struct intel_crtc *crtc,
 476				struct drm_modeset_acquire_ctx *ctx)
 477{
 478	struct drm_i915_private *i915 = to_i915(crtc->base.dev);
 479	struct intel_crtc_state *crtc_state = to_intel_crtc_state(crtc->base.state);
 480	bool needs_link_reset;
 481
 482	if (crtc_state->hw.active) {
 483		struct intel_plane *plane;
 484
 485		/* Disable everything but the primary plane */
 486		for_each_intel_plane_on_crtc(&i915->drm, crtc, plane) {
 487			const struct intel_plane_state *plane_state =
 488				to_intel_plane_state(plane->base.state);
 489
 490			if (plane_state->uapi.visible &&
 491			    plane->base.type != DRM_PLANE_TYPE_PRIMARY)
 492				intel_plane_disable_noatomic(crtc, plane);
 493		}
 494
 495		/* Disable any background color/etc. set by the BIOS */
 496		intel_color_commit_noarm(NULL, crtc_state);
 497		intel_color_commit_arm(NULL, crtc_state);
 498	}
 499
 500	if (!crtc_state->hw.active ||
 501	    intel_crtc_is_joiner_secondary(crtc_state))
 502		return false;
 503
 504	needs_link_reset = intel_crtc_needs_link_reset(crtc);
 505
 506	/*
 507	 * Adjust the state of the output pipe according to whether we have
 508	 * active connectors/encoders.
 509	 */
 510	if (!needs_link_reset && intel_crtc_has_encoders(crtc))
 511		return false;
 512
 513	intel_crtc_disable_noatomic(crtc, ctx);
 514
 515	/*
 516	 * The HPD state on other active/disconnected TC ports may be stuck in
 517	 * the connected state until this port is disabled and a ~10ms delay has
 518	 * passed, wait here for that so that sanitizing other CRTCs will see the
 519	 * up-to-date HPD state.
 520	 */
 521	if (needs_link_reset)
 522		msleep(20);
 523
 524	return true;
 525}
 526
 527static void intel_sanitize_all_crtcs(struct drm_i915_private *i915,
 528				     struct drm_modeset_acquire_ctx *ctx)
 529{
 530	struct intel_crtc *crtc;
 531	u32 crtcs_forced_off = 0;
 532
 533	/*
 534	 * An active and disconnected TypeC port prevents the HPD live state
 535	 * to get updated on other active/disconnected TypeC ports, so after
 536	 * a port gets disabled the CRTCs using other TypeC ports must be
 537	 * rechecked wrt. their link status.
 538	 */
 539	for (;;) {
 540		u32 old_mask = crtcs_forced_off;
 541
 542		for_each_intel_crtc(&i915->drm, crtc) {
 543			u32 crtc_mask = drm_crtc_mask(&crtc->base);
 544
 545			if (crtcs_forced_off & crtc_mask)
 546				continue;
 547
 548			if (intel_sanitize_crtc(crtc, ctx))
 549				crtcs_forced_off |= crtc_mask;
 550		}
 551		if (crtcs_forced_off == old_mask)
 552			break;
 553	}
 554
 555	for_each_intel_crtc(&i915->drm, crtc) {
 556		struct intel_crtc_state *crtc_state =
 557			to_intel_crtc_state(crtc->base.state);
 558
 559		intel_crtc_state_dump(crtc_state, NULL, "setup_hw_state");
 560	}
 561}
 562
 563static bool has_bogus_dpll_config(const struct intel_crtc_state *crtc_state)
 564{
 565	struct drm_i915_private *i915 = to_i915(crtc_state->uapi.crtc->dev);
 566
 567	/*
 568	 * Some SNB BIOSen (eg. ASUS K53SV) are known to misprogram
 569	 * the hardware when a high res displays plugged in. DPLL P
 570	 * divider is zero, and the pipe timings are bonkers. We'll
 571	 * try to disable everything in that case.
 572	 *
 573	 * FIXME would be nice to be able to sanitize this state
 574	 * without several WARNs, but for now let's take the easy
 575	 * road.
 576	 */
 577	return IS_SANDYBRIDGE(i915) &&
 578		crtc_state->hw.active &&
 579		crtc_state->shared_dpll &&
 580		crtc_state->port_clock == 0;
 581}
 582
 583static void intel_sanitize_encoder(struct intel_encoder *encoder)
 584{
 585	struct drm_i915_private *i915 = to_i915(encoder->base.dev);
 586	struct intel_connector *connector;
 587	struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
 588	struct intel_crtc_state *crtc_state = crtc ?
 589		to_intel_crtc_state(crtc->base.state) : NULL;
 590	struct intel_pmdemand_state *pmdemand_state =
 591		to_intel_pmdemand_state(i915->display.pmdemand.obj.state);
 592
 593	/*
 594	 * We need to check both for a crtc link (meaning that the encoder is
 595	 * active and trying to read from a pipe) and the pipe itself being
 596	 * active.
 597	 */
 598	bool has_active_crtc = crtc_state &&
 599		crtc_state->hw.active;
 600
 601	if (crtc_state && has_bogus_dpll_config(crtc_state)) {
 602		drm_dbg_kms(&i915->drm,
 603			    "BIOS has misprogrammed the hardware. Disabling pipe %c\n",
 604			    pipe_name(crtc->pipe));
 605		has_active_crtc = false;
 606	}
 607
 608	connector = intel_encoder_find_connector(encoder);
 609	if (connector && !has_active_crtc) {
 610		drm_dbg_kms(&i915->drm,
 611			    "[ENCODER:%d:%s] has active connectors but no active pipe!\n",
 612			    encoder->base.base.id,
 613			    encoder->base.name);
 614
 615		/* Clear the corresponding bit in pmdemand active phys mask */
 616		intel_pmdemand_update_phys_mask(i915, encoder,
 617						pmdemand_state, false);
 618
 619		/*
 620		 * Connector is active, but has no active pipe. This is fallout
 621		 * from our resume register restoring. Disable the encoder
 622		 * manually again.
 623		 */
 624		if (crtc_state) {
 625			struct drm_encoder *best_encoder;
 626
 627			drm_dbg_kms(&i915->drm,
 628				    "[ENCODER:%d:%s] manually disabled\n",
 629				    encoder->base.base.id,
 630				    encoder->base.name);
 631
 632			/* avoid oopsing in case the hooks consult best_encoder */
 633			best_encoder = connector->base.state->best_encoder;
 634			connector->base.state->best_encoder = &encoder->base;
 635
 636			/* FIXME NULL atomic state passed! */
 637			if (encoder->disable)
 638				encoder->disable(NULL, encoder, crtc_state,
 639						 connector->base.state);
 640			if (encoder->post_disable)
 641				encoder->post_disable(NULL, encoder, crtc_state,
 642						      connector->base.state);
 643
 644			connector->base.state->best_encoder = best_encoder;
 645		}
 646		encoder->base.crtc = NULL;
 647
 648		/*
 649		 * Inconsistent output/port/pipe state happens presumably due to
 650		 * a bug in one of the get_hw_state functions. Or someplace else
 651		 * in our code, like the register restore mess on resume. Clamp
 652		 * things to off as a safer default.
 653		 */
 654		connector->base.dpms = DRM_MODE_DPMS_OFF;
 655		connector->base.encoder = NULL;
 656	}
 657
 658	/* notify opregion of the sanitized encoder state */
 659	intel_opregion_notify_encoder(encoder, connector && has_active_crtc);
 660
 661	if (HAS_DDI(i915))
 662		intel_ddi_sanitize_encoder_pll_mapping(encoder);
 663}
 664
 665/* FIXME read out full plane state for all planes */
 666static void readout_plane_state(struct drm_i915_private *i915)
 667{
 668	struct intel_display *display = &i915->display;
 669	struct intel_plane *plane;
 670	struct intel_crtc *crtc;
 671
 672	for_each_intel_plane(&i915->drm, plane) {
 673		struct intel_plane_state *plane_state =
 674			to_intel_plane_state(plane->base.state);
 675		struct intel_crtc_state *crtc_state;
 676		enum pipe pipe = PIPE_A;
 677		bool visible;
 678
 679		visible = plane->get_hw_state(plane, &pipe);
 680
 681		crtc = intel_crtc_for_pipe(display, pipe);
 682		crtc_state = to_intel_crtc_state(crtc->base.state);
 683
 684		intel_set_plane_visible(crtc_state, plane_state, visible);
 685
 686		drm_dbg_kms(&i915->drm,
 687			    "[PLANE:%d:%s] hw state readout: %s, pipe %c\n",
 688			    plane->base.base.id, plane->base.name,
 689			    str_enabled_disabled(visible), pipe_name(pipe));
 690	}
 691
 692	for_each_intel_crtc(&i915->drm, crtc) {
 693		struct intel_crtc_state *crtc_state =
 694			to_intel_crtc_state(crtc->base.state);
 695
 696		intel_plane_fixup_bitmasks(crtc_state);
 697	}
 698}
 699
 700static void intel_modeset_readout_hw_state(struct drm_i915_private *i915)
 701{
 702	struct intel_display *display = &i915->display;
 703	struct intel_cdclk_state *cdclk_state =
 704		to_intel_cdclk_state(i915->display.cdclk.obj.state);
 705	struct intel_dbuf_state *dbuf_state =
 706		to_intel_dbuf_state(i915->display.dbuf.obj.state);
 707	struct intel_pmdemand_state *pmdemand_state =
 708		to_intel_pmdemand_state(i915->display.pmdemand.obj.state);
 709	enum pipe pipe;
 710	struct intel_crtc *crtc;
 711	struct intel_encoder *encoder;
 712	struct intel_connector *connector;
 713	struct drm_connector_list_iter conn_iter;
 714	u8 active_pipes = 0;
 715
 716	for_each_intel_crtc(&i915->drm, crtc) {
 717		struct intel_crtc_state *crtc_state =
 718			to_intel_crtc_state(crtc->base.state);
 719
 720		__drm_atomic_helper_crtc_destroy_state(&crtc_state->uapi);
 721		intel_crtc_free_hw_state(crtc_state);
 722		intel_crtc_state_reset(crtc_state, crtc);
 723
 724		intel_crtc_get_pipe_config(crtc_state);
 725
 726		crtc_state->hw.enable = crtc_state->hw.active;
 727
 728		crtc->base.enabled = crtc_state->hw.enable;
 729		crtc->active = crtc_state->hw.active;
 730
 731		if (crtc_state->hw.active)
 732			active_pipes |= BIT(crtc->pipe);
 733
 734		drm_dbg_kms(&i915->drm,
 735			    "[CRTC:%d:%s] hw state readout: %s\n",
 736			    crtc->base.base.id, crtc->base.name,
 737			    str_enabled_disabled(crtc_state->hw.active));
 738	}
 739
 740	cdclk_state->active_pipes = active_pipes;
 741	dbuf_state->active_pipes = active_pipes;
 742
 743	readout_plane_state(i915);
 744
 745	for_each_intel_encoder(&i915->drm, encoder) {
 746		struct intel_crtc_state *crtc_state = NULL;
 747
 748		pipe = 0;
 749
 750		if (encoder->get_hw_state(encoder, &pipe)) {
 751			crtc = intel_crtc_for_pipe(display, pipe);
 752			crtc_state = to_intel_crtc_state(crtc->base.state);
 753
 754			encoder->base.crtc = &crtc->base;
 755			intel_encoder_get_config(encoder, crtc_state);
 756
 757			/* read out to secondary crtc as well for joiner */
 758			if (crtc_state->joiner_pipes) {
 759				struct intel_crtc *secondary_crtc;
 760
 761				/* encoder should read be linked to joiner primary */
 762				WARN_ON(intel_crtc_is_joiner_secondary(crtc_state));
 763
 764				for_each_intel_crtc_in_pipe_mask(&i915->drm, secondary_crtc,
 765								 intel_crtc_joiner_secondary_pipes(crtc_state)) {
 766					struct intel_crtc_state *secondary_crtc_state;
 767
 768					secondary_crtc_state = to_intel_crtc_state(secondary_crtc->base.state);
 769					intel_encoder_get_config(encoder, secondary_crtc_state);
 770				}
 771			}
 772
 773			intel_pmdemand_update_phys_mask(i915, encoder,
 774							pmdemand_state,
 775							true);
 776		} else {
 777			intel_pmdemand_update_phys_mask(i915, encoder,
 778							pmdemand_state,
 779							false);
 780
 781			encoder->base.crtc = NULL;
 782		}
 783
 784		if (encoder->sync_state)
 785			encoder->sync_state(encoder, crtc_state);
 786
 787		drm_dbg_kms(&i915->drm,
 788			    "[ENCODER:%d:%s] hw state readout: %s, pipe %c\n",
 789			    encoder->base.base.id, encoder->base.name,
 790			    str_enabled_disabled(encoder->base.crtc),
 791			    pipe_name(pipe));
 792	}
 793
 794	intel_dpll_readout_hw_state(i915);
 795
 796	drm_connector_list_iter_begin(&i915->drm, &conn_iter);
 797	for_each_intel_connector_iter(connector, &conn_iter) {
 798		struct intel_crtc_state *crtc_state = NULL;
 799
 800		if (connector->get_hw_state(connector)) {
 801			struct intel_crtc *crtc;
 802
 803			connector->base.dpms = DRM_MODE_DPMS_ON;
 804
 805			encoder = intel_attached_encoder(connector);
 806			connector->base.encoder = &encoder->base;
 807
 808			crtc = to_intel_crtc(encoder->base.crtc);
 809			crtc_state = crtc ? to_intel_crtc_state(crtc->base.state) : NULL;
 810
 811			if (crtc_state && crtc_state->hw.active) {
 812				/*
 813				 * This has to be done during hardware readout
 814				 * because anything calling .crtc_disable may
 815				 * rely on the connector_mask being accurate.
 816				 */
 817				crtc_state->uapi.connector_mask |=
 818					drm_connector_mask(&connector->base);
 819				crtc_state->uapi.encoder_mask |=
 820					drm_encoder_mask(&encoder->base);
 821			}
 822		} else {
 823			connector->base.dpms = DRM_MODE_DPMS_OFF;
 824			connector->base.encoder = NULL;
 825		}
 826
 827		if (connector->sync_state)
 828			connector->sync_state(connector, crtc_state);
 829
 830		drm_dbg_kms(&i915->drm,
 831			    "[CONNECTOR:%d:%s] hw state readout: %s\n",
 832			    connector->base.base.id, connector->base.name,
 833			    str_enabled_disabled(connector->base.encoder));
 834	}
 835	drm_connector_list_iter_end(&conn_iter);
 836
 837	for_each_intel_crtc(&i915->drm, crtc) {
 838		struct intel_bw_state *bw_state =
 839			to_intel_bw_state(i915->display.bw.obj.state);
 840		struct intel_crtc_state *crtc_state =
 841			to_intel_crtc_state(crtc->base.state);
 842		struct intel_plane *plane;
 843		int min_cdclk = 0;
 844
 845		if (crtc_state->hw.active) {
 846			/*
 847			 * The initial mode needs to be set in order to keep
 848			 * the atomic core happy. It wants a valid mode if the
 849			 * crtc's enabled, so we do the above call.
 850			 *
 851			 * But we don't set all the derived state fully, hence
 852			 * set a flag to indicate that a full recalculation is
 853			 * needed on the next commit.
 854			 */
 855			crtc_state->inherited = true;
 856
 857			intel_crtc_update_active_timings(crtc_state,
 858							 crtc_state->vrr.enable);
 859
 860			intel_crtc_copy_hw_to_uapi_state(crtc_state);
 861		}
 862
 863		for_each_intel_plane_on_crtc(&i915->drm, crtc, plane) {
 864			const struct intel_plane_state *plane_state =
 865				to_intel_plane_state(plane->base.state);
 866
 867			/*
 868			 * FIXME don't have the fb yet, so can't
 869			 * use intel_plane_data_rate() :(
 870			 */
 871			if (plane_state->uapi.visible)
 872				crtc_state->data_rate[plane->id] =
 873					4 * crtc_state->pixel_rate;
 874			/*
 875			 * FIXME don't have the fb yet, so can't
 876			 * use plane->min_cdclk() :(
 877			 */
 878			if (plane_state->uapi.visible && plane->min_cdclk) {
 879				if (crtc_state->double_wide || DISPLAY_VER(i915) >= 10)
 880					crtc_state->min_cdclk[plane->id] =
 881						DIV_ROUND_UP(crtc_state->pixel_rate, 2);
 882				else
 883					crtc_state->min_cdclk[plane->id] =
 884						crtc_state->pixel_rate;
 885			}
 886			drm_dbg_kms(&i915->drm,
 887				    "[PLANE:%d:%s] min_cdclk %d kHz\n",
 888				    plane->base.base.id, plane->base.name,
 889				    crtc_state->min_cdclk[plane->id]);
 890		}
 891
 892		if (crtc_state->hw.active) {
 893			min_cdclk = intel_crtc_compute_min_cdclk(crtc_state);
 894			if (drm_WARN_ON(&i915->drm, min_cdclk < 0))
 895				min_cdclk = 0;
 896		}
 897
 898		cdclk_state->min_cdclk[crtc->pipe] = min_cdclk;
 899		cdclk_state->min_voltage_level[crtc->pipe] =
 900			crtc_state->min_voltage_level;
 901
 902		intel_pmdemand_update_port_clock(i915, pmdemand_state, pipe,
 903						 crtc_state->port_clock);
 904
 905		intel_bw_crtc_update(bw_state, crtc_state);
 906	}
 907
 908	intel_pmdemand_init_pmdemand_params(i915, pmdemand_state);
 909}
 910
 911static void
 912get_encoder_power_domains(struct drm_i915_private *i915)
 913{
 914	struct intel_encoder *encoder;
 915
 916	for_each_intel_encoder(&i915->drm, encoder) {
 917		struct intel_crtc_state *crtc_state;
 918
 919		if (!encoder->get_power_domains)
 920			continue;
 921
 922		/*
 923		 * MST-primary and inactive encoders don't have a crtc state
 924		 * and neither of these require any power domain references.
 925		 */
 926		if (!encoder->base.crtc)
 927			continue;
 928
 929		crtc_state = to_intel_crtc_state(encoder->base.crtc->state);
 930		encoder->get_power_domains(encoder, crtc_state);
 931	}
 932}
 933
 934static void intel_early_display_was(struct drm_i915_private *i915)
 935{
 936	/*
 937	 * Display WA #1185 WaDisableDARBFClkGating:glk,icl,ehl,tgl
 938	 * Also known as Wa_14010480278.
 939	 */
 940	if (IS_DISPLAY_VER(i915, 10, 12))
 941		intel_de_rmw(i915, GEN9_CLKGATE_DIS_0, 0, DARBF_GATING_DIS);
 942
 943	/*
 944	 * WaRsPkgCStateDisplayPMReq:hsw
 945	 * System hang if this isn't done before disabling all planes!
 946	 */
 947	if (IS_HASWELL(i915))
 948		intel_de_rmw(i915, CHICKEN_PAR1_1, 0, FORCE_ARB_IDLE_PLANES);
 949
 950	if (IS_KABYLAKE(i915) || IS_COFFEELAKE(i915) || IS_COMETLAKE(i915)) {
 951		/* Display WA #1142:kbl,cfl,cml */
 952		intel_de_rmw(i915, CHICKEN_PAR1_1,
 953			     KBL_ARB_FILL_SPARE_22, KBL_ARB_FILL_SPARE_22);
 954		intel_de_rmw(i915, CHICKEN_MISC_2,
 955			     KBL_ARB_FILL_SPARE_13 | KBL_ARB_FILL_SPARE_14,
 956			     KBL_ARB_FILL_SPARE_14);
 957	}
 958}
 959
 960void intel_modeset_setup_hw_state(struct drm_i915_private *i915,
 961				  struct drm_modeset_acquire_ctx *ctx)
 962{
 963	struct intel_display *display = &i915->display;
 964	struct intel_encoder *encoder;
 965	struct intel_crtc *crtc;
 966	intel_wakeref_t wakeref;
 967
 968	wakeref = intel_display_power_get(i915, POWER_DOMAIN_INIT);
 969
 970	intel_early_display_was(i915);
 971	intel_modeset_readout_hw_state(i915);
 972
 973	/* HW state is read out, now we need to sanitize this mess. */
 974	get_encoder_power_domains(i915);
 975
 976	intel_pch_sanitize(i915);
 977
 978	/*
 979	 * intel_sanitize_plane_mapping() may need to do vblank
 980	 * waits, so we need vblank interrupts restored beforehand.
 981	 */
 982	for_each_intel_crtc(&i915->drm, crtc) {
 983		struct intel_crtc_state *crtc_state =
 984			to_intel_crtc_state(crtc->base.state);
 985
 986		intel_sanitize_fifo_underrun_reporting(crtc_state);
 987
 988		drm_crtc_vblank_reset(&crtc->base);
 989
 990		if (crtc_state->hw.active) {
 991			intel_dmc_enable_pipe(display, crtc->pipe);
 992			intel_crtc_vblank_on(crtc_state);
 993		}
 994	}
 995
 996	intel_fbc_sanitize(&i915->display);
 997
 998	intel_sanitize_plane_mapping(i915);
 999
1000	for_each_intel_encoder(&i915->drm, encoder)
1001		intel_sanitize_encoder(encoder);
1002
1003	/*
1004	 * Sanitizing CRTCs needs their connector atomic state to be
1005	 * up-to-date, so ensure that already here.
1006	 */
1007	intel_modeset_update_connector_atomic_state(i915);
1008
1009	intel_sanitize_all_crtcs(i915, ctx);
1010
1011	intel_dpll_sanitize_state(i915);
1012
1013	intel_wm_get_hw_state(i915);
1014
1015	for_each_intel_crtc(&i915->drm, crtc) {
1016		struct intel_crtc_state *crtc_state =
1017			to_intel_crtc_state(crtc->base.state);
1018		struct intel_power_domain_mask put_domains;
1019
1020		intel_modeset_get_crtc_power_domains(crtc_state, &put_domains);
1021		if (drm_WARN_ON(&i915->drm, !bitmap_empty(put_domains.bits, POWER_DOMAIN_NUM)))
1022			intel_modeset_put_crtc_power_domains(crtc, &put_domains);
1023	}
1024
1025	intel_display_power_put(i915, POWER_DOMAIN_INIT, wakeref);
1026
1027	intel_power_domains_sanitize_state(i915);
1028}