1/*
   2 * Copyright 2006 Dave Airlie <airlied@linux.ie>
   3 * Copyright © 2006-2009 Intel Corporation
   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 (including the next
  13 * paragraph) shall be included in all copies or substantial portions of the
  14 * Software.
  15 *
  16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22 * DEALINGS IN THE SOFTWARE.
  23 *
  24 * Authors:
  25 *	Eric Anholt <eric@anholt.net>
  26 *	Jesse Barnes <jesse.barnes@intel.com>
  27 */
  28
  29#include <linux/delay.h>
  30#include <linux/hdmi.h>
  31#include <linux/i2c.h>
  32#include <linux/slab.h>
  33#include <linux/string_helpers.h>
  34
  35#include <drm/display/drm_hdcp_helper.h>
  36#include <drm/display/drm_hdmi_helper.h>
  37#include <drm/display/drm_scdc_helper.h>
  38#include <drm/drm_atomic_helper.h>
  39#include <drm/drm_crtc.h>
  40#include <drm/drm_edid.h>
  41#include <drm/drm_probe_helper.h>
  42#include <drm/intel/intel_lpe_audio.h>
 
  43
  44#include <media/cec-notifier.h>
  45
  46#include "g4x_hdmi.h"
  47#include "i915_drv.h"
  48#include "i915_reg.h"
  49#include "intel_atomic.h"
  50#include "intel_audio.h"
  51#include "intel_connector.h"
  52#include "intel_cx0_phy.h"
  53#include "intel_ddi.h"
  54#include "intel_de.h"
  55#include "intel_display_driver.h"
  56#include "intel_display_types.h"
  57#include "intel_dp.h"
 
 
  58#include "intel_gmbus.h"
  59#include "intel_hdcp.h"
  60#include "intel_hdcp_regs.h"
  61#include "intel_hdcp_shim.h"
  62#include "intel_hdmi.h"
 
  63#include "intel_lspcon.h"
  64#include "intel_panel.h"
  65#include "intel_pfit.h"
  66#include "intel_snps_phy.h"
 
 
 
 
 
  67
  68static void
  69assert_hdmi_port_disabled(struct intel_hdmi *intel_hdmi)
  70{
  71	struct intel_display *display = to_intel_display(intel_hdmi);
 
  72	u32 enabled_bits;
  73
  74	enabled_bits = HAS_DDI(display) ? DDI_BUF_CTL_ENABLE : SDVO_ENABLE;
  75
  76	drm_WARN(display->drm,
  77		 intel_de_read(display, intel_hdmi->hdmi_reg) & enabled_bits,
  78		 "HDMI port enabled, expecting disabled\n");
  79}
  80
  81static void
  82assert_hdmi_transcoder_func_disabled(struct intel_display *display,
  83				     enum transcoder cpu_transcoder)
  84{
  85	drm_WARN(display->drm,
  86		 intel_de_read(display, TRANS_DDI_FUNC_CTL(display, cpu_transcoder)) &
  87		 TRANS_DDI_FUNC_ENABLE,
  88		 "HDMI transcoder function enabled, expecting disabled\n");
  89}
  90
 
 
 
 
 
 
 
 
 
 
 
 
 
  91static u32 g4x_infoframe_index(unsigned int type)
  92{
  93	switch (type) {
  94	case HDMI_PACKET_TYPE_GAMUT_METADATA:
  95		return VIDEO_DIP_SELECT_GAMUT;
  96	case HDMI_INFOFRAME_TYPE_AVI:
  97		return VIDEO_DIP_SELECT_AVI;
  98	case HDMI_INFOFRAME_TYPE_SPD:
  99		return VIDEO_DIP_SELECT_SPD;
 100	case HDMI_INFOFRAME_TYPE_VENDOR:
 101		return VIDEO_DIP_SELECT_VENDOR;
 102	default:
 103		MISSING_CASE(type);
 104		return 0;
 105	}
 106}
 107
 108static u32 g4x_infoframe_enable(unsigned int type)
 109{
 110	switch (type) {
 111	case HDMI_PACKET_TYPE_GENERAL_CONTROL:
 112		return VIDEO_DIP_ENABLE_GCP;
 113	case HDMI_PACKET_TYPE_GAMUT_METADATA:
 114		return VIDEO_DIP_ENABLE_GAMUT;
 115	case DP_SDP_VSC:
 116		return 0;
 117	case DP_SDP_ADAPTIVE_SYNC:
 118		return 0;
 119	case HDMI_INFOFRAME_TYPE_AVI:
 120		return VIDEO_DIP_ENABLE_AVI;
 121	case HDMI_INFOFRAME_TYPE_SPD:
 122		return VIDEO_DIP_ENABLE_SPD;
 123	case HDMI_INFOFRAME_TYPE_VENDOR:
 124		return VIDEO_DIP_ENABLE_VENDOR;
 125	case HDMI_INFOFRAME_TYPE_DRM:
 126		return 0;
 127	default:
 128		MISSING_CASE(type);
 129		return 0;
 130	}
 131}
 132
 133static u32 hsw_infoframe_enable(unsigned int type)
 134{
 135	switch (type) {
 136	case HDMI_PACKET_TYPE_GENERAL_CONTROL:
 137		return VIDEO_DIP_ENABLE_GCP_HSW;
 138	case HDMI_PACKET_TYPE_GAMUT_METADATA:
 139		return VIDEO_DIP_ENABLE_GMP_HSW;
 140	case DP_SDP_VSC:
 141		return VIDEO_DIP_ENABLE_VSC_HSW;
 142	case DP_SDP_ADAPTIVE_SYNC:
 143		return VIDEO_DIP_ENABLE_AS_ADL;
 144	case DP_SDP_PPS:
 145		return VDIP_ENABLE_PPS;
 146	case HDMI_INFOFRAME_TYPE_AVI:
 147		return VIDEO_DIP_ENABLE_AVI_HSW;
 148	case HDMI_INFOFRAME_TYPE_SPD:
 149		return VIDEO_DIP_ENABLE_SPD_HSW;
 150	case HDMI_INFOFRAME_TYPE_VENDOR:
 151		return VIDEO_DIP_ENABLE_VS_HSW;
 152	case HDMI_INFOFRAME_TYPE_DRM:
 153		return VIDEO_DIP_ENABLE_DRM_GLK;
 154	default:
 155		MISSING_CASE(type);
 156		return 0;
 157	}
 158}
 159
 160static i915_reg_t
 161hsw_dip_data_reg(struct intel_display *display,
 162		 enum transcoder cpu_transcoder,
 163		 unsigned int type,
 164		 int i)
 165{
 166	switch (type) {
 167	case HDMI_PACKET_TYPE_GAMUT_METADATA:
 168		return HSW_TVIDEO_DIP_GMP_DATA(display, cpu_transcoder, i);
 169	case DP_SDP_VSC:
 170		return HSW_TVIDEO_DIP_VSC_DATA(display, cpu_transcoder, i);
 171	case DP_SDP_ADAPTIVE_SYNC:
 172		return ADL_TVIDEO_DIP_AS_SDP_DATA(display, cpu_transcoder, i);
 173	case DP_SDP_PPS:
 174		return ICL_VIDEO_DIP_PPS_DATA(display, cpu_transcoder, i);
 175	case HDMI_INFOFRAME_TYPE_AVI:
 176		return HSW_TVIDEO_DIP_AVI_DATA(display, cpu_transcoder, i);
 177	case HDMI_INFOFRAME_TYPE_SPD:
 178		return HSW_TVIDEO_DIP_SPD_DATA(display, cpu_transcoder, i);
 179	case HDMI_INFOFRAME_TYPE_VENDOR:
 180		return HSW_TVIDEO_DIP_VS_DATA(display, cpu_transcoder, i);
 181	case HDMI_INFOFRAME_TYPE_DRM:
 182		return GLK_TVIDEO_DIP_DRM_DATA(display, cpu_transcoder, i);
 183	default:
 184		MISSING_CASE(type);
 185		return INVALID_MMIO_REG;
 186	}
 187}
 188
 189static int hsw_dip_data_size(struct intel_display *display,
 190			     unsigned int type)
 191{
 192	switch (type) {
 193	case DP_SDP_VSC:
 194		return VIDEO_DIP_VSC_DATA_SIZE;
 195	case DP_SDP_ADAPTIVE_SYNC:
 196		return VIDEO_DIP_ASYNC_DATA_SIZE;
 197	case DP_SDP_PPS:
 198		return VIDEO_DIP_PPS_DATA_SIZE;
 199	case HDMI_PACKET_TYPE_GAMUT_METADATA:
 200		if (DISPLAY_VER(display) >= 11)
 201			return VIDEO_DIP_GMP_DATA_SIZE;
 202		else
 203			return VIDEO_DIP_DATA_SIZE;
 204	default:
 205		return VIDEO_DIP_DATA_SIZE;
 206	}
 207}
 208
 209static void g4x_write_infoframe(struct intel_encoder *encoder,
 210				const struct intel_crtc_state *crtc_state,
 211				unsigned int type,
 212				const void *frame, ssize_t len)
 213{
 214	struct intel_display *display = to_intel_display(encoder);
 215	const u32 *data = frame;
 216	u32 val = intel_de_read(display, VIDEO_DIP_CTL);
 
 217	int i;
 218
 219	drm_WARN(display->drm, !(val & VIDEO_DIP_ENABLE),
 220		 "Writing DIP with CTL reg disabled\n");
 221
 222	val &= ~(VIDEO_DIP_SELECT_MASK | 0xf); /* clear DIP data offset */
 223	val |= g4x_infoframe_index(type);
 224
 225	val &= ~g4x_infoframe_enable(type);
 226
 227	intel_de_write(display, VIDEO_DIP_CTL, val);
 228
 229	for (i = 0; i < len; i += 4) {
 230		intel_de_write(display, VIDEO_DIP_DATA, *data);
 231		data++;
 232	}
 233	/* Write every possible data byte to force correct ECC calculation. */
 234	for (; i < VIDEO_DIP_DATA_SIZE; i += 4)
 235		intel_de_write(display, VIDEO_DIP_DATA, 0);
 236
 237	val |= g4x_infoframe_enable(type);
 238	val &= ~VIDEO_DIP_FREQ_MASK;
 239	val |= VIDEO_DIP_FREQ_VSYNC;
 240
 241	intel_de_write(display, VIDEO_DIP_CTL, val);
 242	intel_de_posting_read(display, VIDEO_DIP_CTL);
 243}
 244
 245static void g4x_read_infoframe(struct intel_encoder *encoder,
 246			       const struct intel_crtc_state *crtc_state,
 247			       unsigned int type,
 248			       void *frame, ssize_t len)
 249{
 250	struct intel_display *display = to_intel_display(encoder);
 251	u32 *data = frame;
 252	int i;
 253
 254	intel_de_rmw(display, VIDEO_DIP_CTL,
 255		     VIDEO_DIP_SELECT_MASK | 0xf, g4x_infoframe_index(type));
 
 
 
 
 256
 257	for (i = 0; i < len; i += 4)
 258		*data++ = intel_de_read(display, VIDEO_DIP_DATA);
 259}
 260
 261static u32 g4x_infoframes_enabled(struct intel_encoder *encoder,
 262				  const struct intel_crtc_state *pipe_config)
 263{
 264	struct intel_display *display = to_intel_display(encoder);
 265	u32 val = intel_de_read(display, VIDEO_DIP_CTL);
 266
 267	if ((val & VIDEO_DIP_ENABLE) == 0)
 268		return 0;
 269
 270	if ((val & VIDEO_DIP_PORT_MASK) != VIDEO_DIP_PORT(encoder->port))
 271		return 0;
 272
 273	return val & (VIDEO_DIP_ENABLE_AVI |
 274		      VIDEO_DIP_ENABLE_VENDOR | VIDEO_DIP_ENABLE_SPD);
 275}
 276
 277static void ibx_write_infoframe(struct intel_encoder *encoder,
 278				const struct intel_crtc_state *crtc_state,
 279				unsigned int type,
 280				const void *frame, ssize_t len)
 281{
 282	struct intel_display *display = to_intel_display(encoder);
 283	const u32 *data = frame;
 284	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
 285	i915_reg_t reg = TVIDEO_DIP_CTL(crtc->pipe);
 286	u32 val = intel_de_read(display, reg);
 
 287	int i;
 288
 289	drm_WARN(display->drm, !(val & VIDEO_DIP_ENABLE),
 290		 "Writing DIP with CTL reg disabled\n");
 291
 292	val &= ~(VIDEO_DIP_SELECT_MASK | 0xf); /* clear DIP data offset */
 293	val |= g4x_infoframe_index(type);
 294
 295	val &= ~g4x_infoframe_enable(type);
 296
 297	intel_de_write(display, reg, val);
 298
 299	for (i = 0; i < len; i += 4) {
 300		intel_de_write(display, TVIDEO_DIP_DATA(crtc->pipe),
 301			       *data);
 302		data++;
 303	}
 304	/* Write every possible data byte to force correct ECC calculation. */
 305	for (; i < VIDEO_DIP_DATA_SIZE; i += 4)
 306		intel_de_write(display, TVIDEO_DIP_DATA(crtc->pipe), 0);
 307
 308	val |= g4x_infoframe_enable(type);
 309	val &= ~VIDEO_DIP_FREQ_MASK;
 310	val |= VIDEO_DIP_FREQ_VSYNC;
 311
 312	intel_de_write(display, reg, val);
 313	intel_de_posting_read(display, reg);
 314}
 315
 316static void ibx_read_infoframe(struct intel_encoder *encoder,
 317			       const struct intel_crtc_state *crtc_state,
 318			       unsigned int type,
 319			       void *frame, ssize_t len)
 320{
 321	struct intel_display *display = to_intel_display(encoder);
 322	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
 323	u32 *data = frame;
 324	int i;
 325
 326	intel_de_rmw(display, TVIDEO_DIP_CTL(crtc->pipe),
 327		     VIDEO_DIP_SELECT_MASK | 0xf, g4x_infoframe_index(type));
 
 
 
 
 328
 329	for (i = 0; i < len; i += 4)
 330		*data++ = intel_de_read(display, TVIDEO_DIP_DATA(crtc->pipe));
 331}
 332
 333static u32 ibx_infoframes_enabled(struct intel_encoder *encoder,
 334				  const struct intel_crtc_state *pipe_config)
 335{
 336	struct intel_display *display = to_intel_display(encoder);
 337	enum pipe pipe = to_intel_crtc(pipe_config->uapi.crtc)->pipe;
 338	i915_reg_t reg = TVIDEO_DIP_CTL(pipe);
 339	u32 val = intel_de_read(display, reg);
 340
 341	if ((val & VIDEO_DIP_ENABLE) == 0)
 342		return 0;
 343
 344	if ((val & VIDEO_DIP_PORT_MASK) != VIDEO_DIP_PORT(encoder->port))
 345		return 0;
 346
 347	return val & (VIDEO_DIP_ENABLE_AVI |
 348		      VIDEO_DIP_ENABLE_VENDOR | VIDEO_DIP_ENABLE_GAMUT |
 349		      VIDEO_DIP_ENABLE_SPD | VIDEO_DIP_ENABLE_GCP);
 350}
 351
 352static void cpt_write_infoframe(struct intel_encoder *encoder,
 353				const struct intel_crtc_state *crtc_state,
 354				unsigned int type,
 355				const void *frame, ssize_t len)
 356{
 357	struct intel_display *display = to_intel_display(encoder);
 358	const u32 *data = frame;
 359	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
 360	i915_reg_t reg = TVIDEO_DIP_CTL(crtc->pipe);
 361	u32 val = intel_de_read(display, reg);
 
 362	int i;
 363
 364	drm_WARN(display->drm, !(val & VIDEO_DIP_ENABLE),
 365		 "Writing DIP with CTL reg disabled\n");
 366
 367	val &= ~(VIDEO_DIP_SELECT_MASK | 0xf); /* clear DIP data offset */
 368	val |= g4x_infoframe_index(type);
 369
 370	/* The DIP control register spec says that we need to update the AVI
 371	 * infoframe without clearing its enable bit */
 372	if (type != HDMI_INFOFRAME_TYPE_AVI)
 373		val &= ~g4x_infoframe_enable(type);
 374
 375	intel_de_write(display, reg, val);
 376
 377	for (i = 0; i < len; i += 4) {
 378		intel_de_write(display, TVIDEO_DIP_DATA(crtc->pipe),
 379			       *data);
 380		data++;
 381	}
 382	/* Write every possible data byte to force correct ECC calculation. */
 383	for (; i < VIDEO_DIP_DATA_SIZE; i += 4)
 384		intel_de_write(display, TVIDEO_DIP_DATA(crtc->pipe), 0);
 385
 386	val |= g4x_infoframe_enable(type);
 387	val &= ~VIDEO_DIP_FREQ_MASK;
 388	val |= VIDEO_DIP_FREQ_VSYNC;
 389
 390	intel_de_write(display, reg, val);
 391	intel_de_posting_read(display, reg);
 392}
 393
 394static void cpt_read_infoframe(struct intel_encoder *encoder,
 395			       const struct intel_crtc_state *crtc_state,
 396			       unsigned int type,
 397			       void *frame, ssize_t len)
 398{
 399	struct intel_display *display = to_intel_display(encoder);
 400	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
 401	u32 *data = frame;
 402	int i;
 403
 404	intel_de_rmw(display, TVIDEO_DIP_CTL(crtc->pipe),
 405		     VIDEO_DIP_SELECT_MASK | 0xf, g4x_infoframe_index(type));
 
 
 
 
 406
 407	for (i = 0; i < len; i += 4)
 408		*data++ = intel_de_read(display, TVIDEO_DIP_DATA(crtc->pipe));
 409}
 410
 411static u32 cpt_infoframes_enabled(struct intel_encoder *encoder,
 412				  const struct intel_crtc_state *pipe_config)
 413{
 414	struct intel_display *display = to_intel_display(encoder);
 415	enum pipe pipe = to_intel_crtc(pipe_config->uapi.crtc)->pipe;
 416	u32 val = intel_de_read(display, TVIDEO_DIP_CTL(pipe));
 417
 418	if ((val & VIDEO_DIP_ENABLE) == 0)
 419		return 0;
 420
 421	return val & (VIDEO_DIP_ENABLE_AVI |
 422		      VIDEO_DIP_ENABLE_VENDOR | VIDEO_DIP_ENABLE_GAMUT |
 423		      VIDEO_DIP_ENABLE_SPD | VIDEO_DIP_ENABLE_GCP);
 424}
 425
 426static void vlv_write_infoframe(struct intel_encoder *encoder,
 427				const struct intel_crtc_state *crtc_state,
 428				unsigned int type,
 429				const void *frame, ssize_t len)
 430{
 431	struct intel_display *display = to_intel_display(encoder);
 432	const u32 *data = frame;
 433	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
 434	i915_reg_t reg = VLV_TVIDEO_DIP_CTL(crtc->pipe);
 435	u32 val = intel_de_read(display, reg);
 
 436	int i;
 437
 438	drm_WARN(display->drm, !(val & VIDEO_DIP_ENABLE),
 439		 "Writing DIP with CTL reg disabled\n");
 440
 441	val &= ~(VIDEO_DIP_SELECT_MASK | 0xf); /* clear DIP data offset */
 442	val |= g4x_infoframe_index(type);
 443
 444	val &= ~g4x_infoframe_enable(type);
 445
 446	intel_de_write(display, reg, val);
 447
 448	for (i = 0; i < len; i += 4) {
 449		intel_de_write(display,
 450			       VLV_TVIDEO_DIP_DATA(crtc->pipe), *data);
 451		data++;
 452	}
 453	/* Write every possible data byte to force correct ECC calculation. */
 454	for (; i < VIDEO_DIP_DATA_SIZE; i += 4)
 455		intel_de_write(display,
 456			       VLV_TVIDEO_DIP_DATA(crtc->pipe), 0);
 457
 458	val |= g4x_infoframe_enable(type);
 459	val &= ~VIDEO_DIP_FREQ_MASK;
 460	val |= VIDEO_DIP_FREQ_VSYNC;
 461
 462	intel_de_write(display, reg, val);
 463	intel_de_posting_read(display, reg);
 464}
 465
 466static void vlv_read_infoframe(struct intel_encoder *encoder,
 467			       const struct intel_crtc_state *crtc_state,
 468			       unsigned int type,
 469			       void *frame, ssize_t len)
 470{
 471	struct intel_display *display = to_intel_display(encoder);
 472	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
 473	u32 *data = frame;
 474	int i;
 475
 476	intel_de_rmw(display, VLV_TVIDEO_DIP_CTL(crtc->pipe),
 477		     VIDEO_DIP_SELECT_MASK | 0xf, g4x_infoframe_index(type));
 
 
 
 
 478
 479	for (i = 0; i < len; i += 4)
 480		*data++ = intel_de_read(display,
 481				        VLV_TVIDEO_DIP_DATA(crtc->pipe));
 482}
 483
 484static u32 vlv_infoframes_enabled(struct intel_encoder *encoder,
 485				  const struct intel_crtc_state *pipe_config)
 486{
 487	struct intel_display *display = to_intel_display(encoder);
 488	enum pipe pipe = to_intel_crtc(pipe_config->uapi.crtc)->pipe;
 489	u32 val = intel_de_read(display, VLV_TVIDEO_DIP_CTL(pipe));
 490
 491	if ((val & VIDEO_DIP_ENABLE) == 0)
 492		return 0;
 493
 494	if ((val & VIDEO_DIP_PORT_MASK) != VIDEO_DIP_PORT(encoder->port))
 495		return 0;
 496
 497	return val & (VIDEO_DIP_ENABLE_AVI |
 498		      VIDEO_DIP_ENABLE_VENDOR | VIDEO_DIP_ENABLE_GAMUT |
 499		      VIDEO_DIP_ENABLE_SPD | VIDEO_DIP_ENABLE_GCP);
 500}
 501
 502void hsw_write_infoframe(struct intel_encoder *encoder,
 503			 const struct intel_crtc_state *crtc_state,
 504			 unsigned int type,
 505			 const void *frame, ssize_t len)
 506{
 507	struct intel_display *display = to_intel_display(encoder);
 508	const u32 *data = frame;
 
 509	enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
 510	i915_reg_t ctl_reg = HSW_TVIDEO_DIP_CTL(display, cpu_transcoder);
 511	int data_size;
 512	int i;
 513	u32 val = intel_de_read(display, ctl_reg);
 514
 515	data_size = hsw_dip_data_size(display, type);
 516
 517	drm_WARN_ON(display->drm, len > data_size);
 518
 519	val &= ~hsw_infoframe_enable(type);
 520	intel_de_write(display, ctl_reg, val);
 521
 522	for (i = 0; i < len; i += 4) {
 523		intel_de_write(display,
 524			       hsw_dip_data_reg(display, cpu_transcoder, type, i >> 2),
 525			       *data);
 526		data++;
 527	}
 528	/* Write every possible data byte to force correct ECC calculation. */
 529	for (; i < data_size; i += 4)
 530		intel_de_write(display,
 531			       hsw_dip_data_reg(display, cpu_transcoder, type, i >> 2),
 532			       0);
 533
 534	/* Wa_14013475917 */
 535	if (!(IS_DISPLAY_VER(display, 13, 14) && crtc_state->has_psr &&
 536	      !crtc_state->has_panel_replay && type == DP_SDP_VSC))
 537		val |= hsw_infoframe_enable(type);
 538
 539	if (type == DP_SDP_VSC)
 540		val |= VSC_DIP_HW_DATA_SW_HEA;
 541
 542	intel_de_write(display, ctl_reg, val);
 543	intel_de_posting_read(display, ctl_reg);
 544}
 545
 546void hsw_read_infoframe(struct intel_encoder *encoder,
 547			const struct intel_crtc_state *crtc_state,
 548			unsigned int type, void *frame, ssize_t len)
 
 549{
 550	struct intel_display *display = to_intel_display(encoder);
 551	enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
 552	u32 *data = frame;
 553	int i;
 554
 
 
 555	for (i = 0; i < len; i += 4)
 556		*data++ = intel_de_read(display,
 557					hsw_dip_data_reg(display, cpu_transcoder, type, i >> 2));
 558}
 559
 560static u32 hsw_infoframes_enabled(struct intel_encoder *encoder,
 561				  const struct intel_crtc_state *pipe_config)
 562{
 563	struct intel_display *display = to_intel_display(encoder);
 564	u32 val = intel_de_read(display,
 565				HSW_TVIDEO_DIP_CTL(display, pipe_config->cpu_transcoder));
 566	u32 mask;
 567
 568	mask = (VIDEO_DIP_ENABLE_VSC_HSW | VIDEO_DIP_ENABLE_AVI_HSW |
 569		VIDEO_DIP_ENABLE_GCP_HSW | VIDEO_DIP_ENABLE_VS_HSW |
 570		VIDEO_DIP_ENABLE_GMP_HSW | VIDEO_DIP_ENABLE_SPD_HSW);
 571
 572	if (DISPLAY_VER(display) >= 10)
 573		mask |= VIDEO_DIP_ENABLE_DRM_GLK;
 574
 575	if (HAS_AS_SDP(display))
 576		mask |= VIDEO_DIP_ENABLE_AS_ADL;
 577
 578	return val & mask;
 579}
 580
 581static const u8 infoframe_type_to_idx[] = {
 582	HDMI_PACKET_TYPE_GENERAL_CONTROL,
 583	HDMI_PACKET_TYPE_GAMUT_METADATA,
 584	DP_SDP_VSC,
 585	DP_SDP_ADAPTIVE_SYNC,
 586	HDMI_INFOFRAME_TYPE_AVI,
 587	HDMI_INFOFRAME_TYPE_SPD,
 588	HDMI_INFOFRAME_TYPE_VENDOR,
 589	HDMI_INFOFRAME_TYPE_DRM,
 590};
 591
 592u32 intel_hdmi_infoframe_enable(unsigned int type)
 593{
 594	int i;
 595
 596	for (i = 0; i < ARRAY_SIZE(infoframe_type_to_idx); i++) {
 597		if (infoframe_type_to_idx[i] == type)
 598			return BIT(i);
 599	}
 600
 601	return 0;
 602}
 603
 604u32 intel_hdmi_infoframes_enabled(struct intel_encoder *encoder,
 605				  const struct intel_crtc_state *crtc_state)
 606{
 607	struct intel_display *display = to_intel_display(encoder);
 608	struct intel_digital_port *dig_port = enc_to_dig_port(encoder);
 609	u32 val, ret = 0;
 610	int i;
 611
 612	val = dig_port->infoframes_enabled(encoder, crtc_state);
 613
 614	/* map from hardware bits to dip idx */
 615	for (i = 0; i < ARRAY_SIZE(infoframe_type_to_idx); i++) {
 616		unsigned int type = infoframe_type_to_idx[i];
 617
 618		if (HAS_DDI(display)) {
 619			if (val & hsw_infoframe_enable(type))
 620				ret |= BIT(i);
 621		} else {
 622			if (val & g4x_infoframe_enable(type))
 623				ret |= BIT(i);
 624		}
 625	}
 626
 627	return ret;
 628}
 629
 630/*
 631 * The data we write to the DIP data buffer registers is 1 byte bigger than the
 632 * HDMI infoframe size because of an ECC/reserved byte at position 3 (starting
 633 * at 0). It's also a byte used by DisplayPort so the same DIP registers can be
 634 * used for both technologies.
 635 *
 636 * DW0: Reserved/ECC/DP | HB2 | HB1 | HB0
 637 * DW1:       DB3       | DB2 | DB1 | DB0
 638 * DW2:       DB7       | DB6 | DB5 | DB4
 639 * DW3: ...
 640 *
 641 * (HB is Header Byte, DB is Data Byte)
 642 *
 643 * The hdmi pack() functions don't know about that hardware specific hole so we
 644 * trick them by giving an offset into the buffer and moving back the header
 645 * bytes by one.
 646 */
 647static void intel_write_infoframe(struct intel_encoder *encoder,
 648				  const struct intel_crtc_state *crtc_state,
 649				  enum hdmi_infoframe_type type,
 650				  const union hdmi_infoframe *frame)
 651{
 652	struct intel_digital_port *dig_port = enc_to_dig_port(encoder);
 653	u8 buffer[VIDEO_DIP_DATA_SIZE];
 654	ssize_t len;
 655
 656	if ((crtc_state->infoframes.enable &
 657	     intel_hdmi_infoframe_enable(type)) == 0)
 658		return;
 659
 660	if (drm_WARN_ON(encoder->base.dev, frame->any.type != type))
 661		return;
 662
 663	/* see comment above for the reason for this offset */
 664	len = hdmi_infoframe_pack_only(frame, buffer + 1, sizeof(buffer) - 1);
 665	if (drm_WARN_ON(encoder->base.dev, len < 0))
 666		return;
 667
 668	/* Insert the 'hole' (see big comment above) at position 3 */
 669	memmove(&buffer[0], &buffer[1], 3);
 670	buffer[3] = 0;
 671	len++;
 672
 673	dig_port->write_infoframe(encoder, crtc_state, type, buffer, len);
 674}
 675
 676void intel_read_infoframe(struct intel_encoder *encoder,
 677			  const struct intel_crtc_state *crtc_state,
 678			  enum hdmi_infoframe_type type,
 679			  union hdmi_infoframe *frame)
 680{
 681	struct intel_digital_port *dig_port = enc_to_dig_port(encoder);
 682	u8 buffer[VIDEO_DIP_DATA_SIZE];
 683	int ret;
 684
 685	if ((crtc_state->infoframes.enable &
 686	     intel_hdmi_infoframe_enable(type)) == 0)
 687		return;
 688
 689	dig_port->read_infoframe(encoder, crtc_state,
 690				       type, buffer, sizeof(buffer));
 691
 692	/* Fill the 'hole' (see big comment above) at position 3 */
 693	memmove(&buffer[1], &buffer[0], 3);
 694
 695	/* see comment above for the reason for this offset */
 696	ret = hdmi_infoframe_unpack(frame, buffer + 1, sizeof(buffer) - 1);
 697	if (ret) {
 698		drm_dbg_kms(encoder->base.dev,
 699			    "Failed to unpack infoframe type 0x%02x\n", type);
 700		return;
 701	}
 702
 703	if (frame->any.type != type)
 704		drm_dbg_kms(encoder->base.dev,
 705			    "Found the wrong infoframe type 0x%x (expected 0x%02x)\n",
 706			    frame->any.type, type);
 707}
 708
 709static bool
 710intel_hdmi_compute_avi_infoframe(struct intel_encoder *encoder,
 711				 struct intel_crtc_state *crtc_state,
 712				 struct drm_connector_state *conn_state)
 713{
 714	struct hdmi_avi_infoframe *frame = &crtc_state->infoframes.avi.avi;
 715	const struct drm_display_mode *adjusted_mode =
 716		&crtc_state->hw.adjusted_mode;
 717	struct drm_connector *connector = conn_state->connector;
 718	int ret;
 719
 720	if (!crtc_state->has_infoframe)
 721		return true;
 722
 723	crtc_state->infoframes.enable |=
 724		intel_hdmi_infoframe_enable(HDMI_INFOFRAME_TYPE_AVI);
 725
 726	ret = drm_hdmi_avi_infoframe_from_display_mode(frame, connector,
 727						       adjusted_mode);
 728	if (ret)
 729		return false;
 730
 731	if (crtc_state->output_format == INTEL_OUTPUT_FORMAT_YCBCR420)
 732		frame->colorspace = HDMI_COLORSPACE_YUV420;
 733	else if (crtc_state->output_format == INTEL_OUTPUT_FORMAT_YCBCR444)
 734		frame->colorspace = HDMI_COLORSPACE_YUV444;
 735	else
 736		frame->colorspace = HDMI_COLORSPACE_RGB;
 737
 738	drm_hdmi_avi_infoframe_colorimetry(frame, conn_state);
 739
 740	/* nonsense combination */
 741	drm_WARN_ON(encoder->base.dev, crtc_state->limited_color_range &&
 742		    crtc_state->output_format != INTEL_OUTPUT_FORMAT_RGB);
 743
 744	if (crtc_state->output_format == INTEL_OUTPUT_FORMAT_RGB) {
 745		drm_hdmi_avi_infoframe_quant_range(frame, connector,
 746						   adjusted_mode,
 747						   crtc_state->limited_color_range ?
 748						   HDMI_QUANTIZATION_RANGE_LIMITED :
 749						   HDMI_QUANTIZATION_RANGE_FULL);
 750	} else {
 751		frame->quantization_range = HDMI_QUANTIZATION_RANGE_DEFAULT;
 752		frame->ycc_quantization_range = HDMI_YCC_QUANTIZATION_RANGE_LIMITED;
 753	}
 754
 755	drm_hdmi_avi_infoframe_content_type(frame, conn_state);
 756
 757	/* TODO: handle pixel repetition for YCBCR420 outputs */
 758
 759	ret = hdmi_avi_infoframe_check(frame);
 760	if (drm_WARN_ON(encoder->base.dev, ret))
 761		return false;
 762
 763	return true;
 764}
 765
 766static bool
 767intel_hdmi_compute_spd_infoframe(struct intel_encoder *encoder,
 768				 struct intel_crtc_state *crtc_state,
 769				 struct drm_connector_state *conn_state)
 770{
 771	struct drm_i915_private *i915 = to_i915(encoder->base.dev);
 772	struct hdmi_spd_infoframe *frame = &crtc_state->infoframes.spd.spd;
 773	int ret;
 774
 775	if (!crtc_state->has_infoframe)
 776		return true;
 777
 778	crtc_state->infoframes.enable |=
 779		intel_hdmi_infoframe_enable(HDMI_INFOFRAME_TYPE_SPD);
 780
 781	if (IS_DGFX(i915))
 782		ret = hdmi_spd_infoframe_init(frame, "Intel", "Discrete gfx");
 783	else
 784		ret = hdmi_spd_infoframe_init(frame, "Intel", "Integrated gfx");
 785
 786	if (drm_WARN_ON(encoder->base.dev, ret))
 787		return false;
 788
 789	frame->sdi = HDMI_SPD_SDI_PC;
 790
 791	ret = hdmi_spd_infoframe_check(frame);
 792	if (drm_WARN_ON(encoder->base.dev, ret))
 793		return false;
 794
 795	return true;
 796}
 797
 798static bool
 799intel_hdmi_compute_hdmi_infoframe(struct intel_encoder *encoder,
 800				  struct intel_crtc_state *crtc_state,
 801				  struct drm_connector_state *conn_state)
 802{
 803	struct hdmi_vendor_infoframe *frame =
 804		&crtc_state->infoframes.hdmi.vendor.hdmi;
 805	const struct drm_display_info *info =
 806		&conn_state->connector->display_info;
 807	int ret;
 808
 809	if (!crtc_state->has_infoframe || !info->has_hdmi_infoframe)
 810		return true;
 811
 812	crtc_state->infoframes.enable |=
 813		intel_hdmi_infoframe_enable(HDMI_INFOFRAME_TYPE_VENDOR);
 814
 815	ret = drm_hdmi_vendor_infoframe_from_display_mode(frame,
 816							  conn_state->connector,
 817							  &crtc_state->hw.adjusted_mode);
 818	if (drm_WARN_ON(encoder->base.dev, ret))
 819		return false;
 820
 821	ret = hdmi_vendor_infoframe_check(frame);
 822	if (drm_WARN_ON(encoder->base.dev, ret))
 823		return false;
 824
 825	return true;
 826}
 827
 828static bool
 829intel_hdmi_compute_drm_infoframe(struct intel_encoder *encoder,
 830				 struct intel_crtc_state *crtc_state,
 831				 struct drm_connector_state *conn_state)
 832{
 833	struct intel_display *display = to_intel_display(encoder);
 834	struct hdmi_drm_infoframe *frame = &crtc_state->infoframes.drm.drm;
 
 835	int ret;
 836
 837	if (DISPLAY_VER(display) < 10)
 838		return true;
 839
 840	if (!crtc_state->has_infoframe)
 841		return true;
 842
 843	if (!conn_state->hdr_output_metadata)
 844		return true;
 845
 846	crtc_state->infoframes.enable |=
 847		intel_hdmi_infoframe_enable(HDMI_INFOFRAME_TYPE_DRM);
 848
 849	ret = drm_hdmi_infoframe_set_hdr_metadata(frame, conn_state);
 850	if (ret < 0) {
 851		drm_dbg_kms(display->drm,
 852			    "couldn't set HDR metadata in infoframe\n");
 853		return false;
 854	}
 855
 856	ret = hdmi_drm_infoframe_check(frame);
 857	if (drm_WARN_ON(display->drm, ret))
 858		return false;
 859
 860	return true;
 861}
 862
 863static void g4x_set_infoframes(struct intel_encoder *encoder,
 864			       bool enable,
 865			       const struct intel_crtc_state *crtc_state,
 866			       const struct drm_connector_state *conn_state)
 867{
 868	struct intel_display *display = to_intel_display(encoder);
 869	struct intel_digital_port *dig_port = enc_to_dig_port(encoder);
 870	struct intel_hdmi *intel_hdmi = &dig_port->hdmi;
 871	i915_reg_t reg = VIDEO_DIP_CTL;
 872	u32 val = intel_de_read(display, reg);
 873	u32 port = VIDEO_DIP_PORT(encoder->port);
 874
 875	assert_hdmi_port_disabled(intel_hdmi);
 876
 877	/* If the registers were not initialized yet, they might be zeroes,
 878	 * which means we're selecting the AVI DIP and we're setting its
 879	 * frequency to once. This seems to really confuse the HW and make
 880	 * things stop working (the register spec says the AVI always needs to
 881	 * be sent every VSync). So here we avoid writing to the register more
 882	 * than we need and also explicitly select the AVI DIP and explicitly
 883	 * set its frequency to every VSync. Avoiding to write it twice seems to
 884	 * be enough to solve the problem, but being defensive shouldn't hurt us
 885	 * either. */
 886	val |= VIDEO_DIP_SELECT_AVI | VIDEO_DIP_FREQ_VSYNC;
 887
 888	if (!enable) {
 889		if (!(val & VIDEO_DIP_ENABLE))
 890			return;
 891		if (port != (val & VIDEO_DIP_PORT_MASK)) {
 892			drm_dbg_kms(display->drm,
 893				    "video DIP still enabled on port %c\n",
 894				    (val & VIDEO_DIP_PORT_MASK) >> 29);
 895			return;
 896		}
 897		val &= ~(VIDEO_DIP_ENABLE | VIDEO_DIP_ENABLE_AVI |
 898			 VIDEO_DIP_ENABLE_VENDOR | VIDEO_DIP_ENABLE_SPD);
 899		intel_de_write(display, reg, val);
 900		intel_de_posting_read(display, reg);
 901		return;
 902	}
 903
 904	if (port != (val & VIDEO_DIP_PORT_MASK)) {
 905		if (val & VIDEO_DIP_ENABLE) {
 906			drm_dbg_kms(display->drm,
 907				    "video DIP already enabled on port %c\n",
 908				    (val & VIDEO_DIP_PORT_MASK) >> 29);
 909			return;
 910		}
 911		val &= ~VIDEO_DIP_PORT_MASK;
 912		val |= port;
 913	}
 914
 915	val |= VIDEO_DIP_ENABLE;
 916	val &= ~(VIDEO_DIP_ENABLE_AVI |
 917		 VIDEO_DIP_ENABLE_VENDOR | VIDEO_DIP_ENABLE_SPD);
 918
 919	intel_de_write(display, reg, val);
 920	intel_de_posting_read(display, reg);
 921
 922	intel_write_infoframe(encoder, crtc_state,
 923			      HDMI_INFOFRAME_TYPE_AVI,
 924			      &crtc_state->infoframes.avi);
 925	intel_write_infoframe(encoder, crtc_state,
 926			      HDMI_INFOFRAME_TYPE_SPD,
 927			      &crtc_state->infoframes.spd);
 928	intel_write_infoframe(encoder, crtc_state,
 929			      HDMI_INFOFRAME_TYPE_VENDOR,
 930			      &crtc_state->infoframes.hdmi);
 931}
 932
 933/*
 934 * Determine if default_phase=1 can be indicated in the GCP infoframe.
 935 *
 936 * From HDMI specification 1.4a:
 937 * - The first pixel of each Video Data Period shall always have a pixel packing phase of 0
 938 * - The first pixel following each Video Data Period shall have a pixel packing phase of 0
 939 * - The PP bits shall be constant for all GCPs and will be equal to the last packing phase
 940 * - The first pixel following every transition of HSYNC or VSYNC shall have a pixel packing
 941 *   phase of 0
 942 */
 943static bool gcp_default_phase_possible(int pipe_bpp,
 944				       const struct drm_display_mode *mode)
 945{
 946	unsigned int pixels_per_group;
 947
 948	switch (pipe_bpp) {
 949	case 30:
 950		/* 4 pixels in 5 clocks */
 951		pixels_per_group = 4;
 952		break;
 953	case 36:
 954		/* 2 pixels in 3 clocks */
 955		pixels_per_group = 2;
 956		break;
 957	case 48:
 958		/* 1 pixel in 2 clocks */
 959		pixels_per_group = 1;
 960		break;
 961	default:
 962		/* phase information not relevant for 8bpc */
 963		return false;
 964	}
 965
 966	return mode->crtc_hdisplay % pixels_per_group == 0 &&
 967		mode->crtc_htotal % pixels_per_group == 0 &&
 968		mode->crtc_hblank_start % pixels_per_group == 0 &&
 969		mode->crtc_hblank_end % pixels_per_group == 0 &&
 970		mode->crtc_hsync_start % pixels_per_group == 0 &&
 971		mode->crtc_hsync_end % pixels_per_group == 0 &&
 972		((mode->flags & DRM_MODE_FLAG_INTERLACE) == 0 ||
 973		 mode->crtc_htotal/2 % pixels_per_group == 0);
 974}
 975
 976static bool intel_hdmi_set_gcp_infoframe(struct intel_encoder *encoder,
 977					 const struct intel_crtc_state *crtc_state,
 978					 const struct drm_connector_state *conn_state)
 979{
 980	struct intel_display *display = to_intel_display(encoder);
 981	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 982	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
 983	i915_reg_t reg;
 984
 985	if ((crtc_state->infoframes.enable &
 986	     intel_hdmi_infoframe_enable(HDMI_PACKET_TYPE_GENERAL_CONTROL)) == 0)
 987		return false;
 988
 989	if (HAS_DDI(display))
 990		reg = HSW_TVIDEO_DIP_GCP(display, crtc_state->cpu_transcoder);
 991	else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
 992		reg = VLV_TVIDEO_DIP_GCP(crtc->pipe);
 993	else if (HAS_PCH_SPLIT(dev_priv))
 994		reg = TVIDEO_DIP_GCP(crtc->pipe);
 995	else
 996		return false;
 997
 998	intel_de_write(display, reg, crtc_state->infoframes.gcp);
 999
1000	return true;
1001}
1002
1003void intel_hdmi_read_gcp_infoframe(struct intel_encoder *encoder,
1004				   struct intel_crtc_state *crtc_state)
1005{
1006	struct intel_display *display = to_intel_display(encoder);
1007	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
1008	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
1009	i915_reg_t reg;
1010
1011	if ((crtc_state->infoframes.enable &
1012	     intel_hdmi_infoframe_enable(HDMI_PACKET_TYPE_GENERAL_CONTROL)) == 0)
1013		return;
1014
1015	if (HAS_DDI(display))
1016		reg = HSW_TVIDEO_DIP_GCP(display, crtc_state->cpu_transcoder);
1017	else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
1018		reg = VLV_TVIDEO_DIP_GCP(crtc->pipe);
1019	else if (HAS_PCH_SPLIT(dev_priv))
1020		reg = TVIDEO_DIP_GCP(crtc->pipe);
1021	else
1022		return;
1023
1024	crtc_state->infoframes.gcp = intel_de_read(display, reg);
1025}
1026
1027static void intel_hdmi_compute_gcp_infoframe(struct intel_encoder *encoder,
1028					     struct intel_crtc_state *crtc_state,
1029					     struct drm_connector_state *conn_state)
1030{
1031	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
1032
1033	if (IS_G4X(dev_priv) || !crtc_state->has_infoframe)
1034		return;
1035
1036	crtc_state->infoframes.enable |=
1037		intel_hdmi_infoframe_enable(HDMI_PACKET_TYPE_GENERAL_CONTROL);
1038
1039	/* Indicate color indication for deep color mode */
1040	if (crtc_state->pipe_bpp > 24)
1041		crtc_state->infoframes.gcp |= GCP_COLOR_INDICATION;
1042
1043	/* Enable default_phase whenever the display mode is suitably aligned */
1044	if (gcp_default_phase_possible(crtc_state->pipe_bpp,
1045				       &crtc_state->hw.adjusted_mode))
1046		crtc_state->infoframes.gcp |= GCP_DEFAULT_PHASE_ENABLE;
1047}
1048
1049static void ibx_set_infoframes(struct intel_encoder *encoder,
1050			       bool enable,
1051			       const struct intel_crtc_state *crtc_state,
1052			       const struct drm_connector_state *conn_state)
1053{
1054	struct intel_display *display = to_intel_display(encoder);
1055	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
1056	struct intel_digital_port *dig_port = enc_to_dig_port(encoder);
1057	struct intel_hdmi *intel_hdmi = &dig_port->hdmi;
1058	i915_reg_t reg = TVIDEO_DIP_CTL(crtc->pipe);
1059	u32 val = intel_de_read(display, reg);
1060	u32 port = VIDEO_DIP_PORT(encoder->port);
1061
1062	assert_hdmi_port_disabled(intel_hdmi);
1063
1064	/* See the big comment in g4x_set_infoframes() */
1065	val |= VIDEO_DIP_SELECT_AVI | VIDEO_DIP_FREQ_VSYNC;
1066
1067	if (!enable) {
1068		if (!(val & VIDEO_DIP_ENABLE))
1069			return;
1070		val &= ~(VIDEO_DIP_ENABLE | VIDEO_DIP_ENABLE_AVI |
1071			 VIDEO_DIP_ENABLE_VENDOR | VIDEO_DIP_ENABLE_GAMUT |
1072			 VIDEO_DIP_ENABLE_SPD | VIDEO_DIP_ENABLE_GCP);
1073		intel_de_write(display, reg, val);
1074		intel_de_posting_read(display, reg);
1075		return;
1076	}
1077
1078	if (port != (val & VIDEO_DIP_PORT_MASK)) {
1079		drm_WARN(display->drm, val & VIDEO_DIP_ENABLE,
1080			 "DIP already enabled on port %c\n",
1081			 (val & VIDEO_DIP_PORT_MASK) >> 29);
1082		val &= ~VIDEO_DIP_PORT_MASK;
1083		val |= port;
1084	}
1085
1086	val |= VIDEO_DIP_ENABLE;
1087	val &= ~(VIDEO_DIP_ENABLE_AVI |
1088		 VIDEO_DIP_ENABLE_VENDOR | VIDEO_DIP_ENABLE_GAMUT |
1089		 VIDEO_DIP_ENABLE_SPD | VIDEO_DIP_ENABLE_GCP);
1090
1091	if (intel_hdmi_set_gcp_infoframe(encoder, crtc_state, conn_state))
1092		val |= VIDEO_DIP_ENABLE_GCP;
1093
1094	intel_de_write(display, reg, val);
1095	intel_de_posting_read(display, reg);
1096
1097	intel_write_infoframe(encoder, crtc_state,
1098			      HDMI_INFOFRAME_TYPE_AVI,
1099			      &crtc_state->infoframes.avi);
1100	intel_write_infoframe(encoder, crtc_state,
1101			      HDMI_INFOFRAME_TYPE_SPD,
1102			      &crtc_state->infoframes.spd);
1103	intel_write_infoframe(encoder, crtc_state,
1104			      HDMI_INFOFRAME_TYPE_VENDOR,
1105			      &crtc_state->infoframes.hdmi);
1106}
1107
1108static void cpt_set_infoframes(struct intel_encoder *encoder,
1109			       bool enable,
1110			       const struct intel_crtc_state *crtc_state,
1111			       const struct drm_connector_state *conn_state)
1112{
1113	struct intel_display *display = to_intel_display(encoder);
1114	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
1115	struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
1116	i915_reg_t reg = TVIDEO_DIP_CTL(crtc->pipe);
1117	u32 val = intel_de_read(display, reg);
1118
1119	assert_hdmi_port_disabled(intel_hdmi);
1120
1121	/* See the big comment in g4x_set_infoframes() */
1122	val |= VIDEO_DIP_SELECT_AVI | VIDEO_DIP_FREQ_VSYNC;
1123
1124	if (!enable) {
1125		if (!(val & VIDEO_DIP_ENABLE))
1126			return;
1127		val &= ~(VIDEO_DIP_ENABLE | VIDEO_DIP_ENABLE_AVI |
1128			 VIDEO_DIP_ENABLE_VENDOR | VIDEO_DIP_ENABLE_GAMUT |
1129			 VIDEO_DIP_ENABLE_SPD | VIDEO_DIP_ENABLE_GCP);
1130		intel_de_write(display, reg, val);
1131		intel_de_posting_read(display, reg);
1132		return;
1133	}
1134
1135	/* Set both together, unset both together: see the spec. */
1136	val |= VIDEO_DIP_ENABLE | VIDEO_DIP_ENABLE_AVI;
1137	val &= ~(VIDEO_DIP_ENABLE_VENDOR | VIDEO_DIP_ENABLE_GAMUT |
1138		 VIDEO_DIP_ENABLE_SPD | VIDEO_DIP_ENABLE_GCP);
1139
1140	if (intel_hdmi_set_gcp_infoframe(encoder, crtc_state, conn_state))
1141		val |= VIDEO_DIP_ENABLE_GCP;
1142
1143	intel_de_write(display, reg, val);
1144	intel_de_posting_read(display, reg);
1145
1146	intel_write_infoframe(encoder, crtc_state,
1147			      HDMI_INFOFRAME_TYPE_AVI,
1148			      &crtc_state->infoframes.avi);
1149	intel_write_infoframe(encoder, crtc_state,
1150			      HDMI_INFOFRAME_TYPE_SPD,
1151			      &crtc_state->infoframes.spd);
1152	intel_write_infoframe(encoder, crtc_state,
1153			      HDMI_INFOFRAME_TYPE_VENDOR,
1154			      &crtc_state->infoframes.hdmi);
1155}
1156
1157static void vlv_set_infoframes(struct intel_encoder *encoder,
1158			       bool enable,
1159			       const struct intel_crtc_state *crtc_state,
1160			       const struct drm_connector_state *conn_state)
1161{
1162	struct intel_display *display = to_intel_display(encoder);
1163	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
1164	struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
1165	i915_reg_t reg = VLV_TVIDEO_DIP_CTL(crtc->pipe);
1166	u32 val = intel_de_read(display, reg);
1167	u32 port = VIDEO_DIP_PORT(encoder->port);
1168
1169	assert_hdmi_port_disabled(intel_hdmi);
1170
1171	/* See the big comment in g4x_set_infoframes() */
1172	val |= VIDEO_DIP_SELECT_AVI | VIDEO_DIP_FREQ_VSYNC;
1173
1174	if (!enable) {
1175		if (!(val & VIDEO_DIP_ENABLE))
1176			return;
1177		val &= ~(VIDEO_DIP_ENABLE | VIDEO_DIP_ENABLE_AVI |
1178			 VIDEO_DIP_ENABLE_VENDOR | VIDEO_DIP_ENABLE_GAMUT |
1179			 VIDEO_DIP_ENABLE_SPD | VIDEO_DIP_ENABLE_GCP);
1180		intel_de_write(display, reg, val);
1181		intel_de_posting_read(display, reg);
1182		return;
1183	}
1184
1185	if (port != (val & VIDEO_DIP_PORT_MASK)) {
1186		drm_WARN(display->drm, val & VIDEO_DIP_ENABLE,
1187			 "DIP already enabled on port %c\n",
1188			 (val & VIDEO_DIP_PORT_MASK) >> 29);
1189		val &= ~VIDEO_DIP_PORT_MASK;
1190		val |= port;
1191	}
1192
1193	val |= VIDEO_DIP_ENABLE;
1194	val &= ~(VIDEO_DIP_ENABLE_AVI |
1195		 VIDEO_DIP_ENABLE_VENDOR | VIDEO_DIP_ENABLE_GAMUT |
1196		 VIDEO_DIP_ENABLE_SPD | VIDEO_DIP_ENABLE_GCP);
1197
1198	if (intel_hdmi_set_gcp_infoframe(encoder, crtc_state, conn_state))
1199		val |= VIDEO_DIP_ENABLE_GCP;
1200
1201	intel_de_write(display, reg, val);
1202	intel_de_posting_read(display, reg);
1203
1204	intel_write_infoframe(encoder, crtc_state,
1205			      HDMI_INFOFRAME_TYPE_AVI,
1206			      &crtc_state->infoframes.avi);
1207	intel_write_infoframe(encoder, crtc_state,
1208			      HDMI_INFOFRAME_TYPE_SPD,
1209			      &crtc_state->infoframes.spd);
1210	intel_write_infoframe(encoder, crtc_state,
1211			      HDMI_INFOFRAME_TYPE_VENDOR,
1212			      &crtc_state->infoframes.hdmi);
1213}
1214
1215void intel_hdmi_fastset_infoframes(struct intel_encoder *encoder,
1216				   const struct intel_crtc_state *crtc_state,
1217				   const struct drm_connector_state *conn_state)
1218{
1219	struct intel_display *display = to_intel_display(encoder);
1220	i915_reg_t reg = HSW_TVIDEO_DIP_CTL(display,
1221					    crtc_state->cpu_transcoder);
1222	u32 val = intel_de_read(display, reg);
1223
1224	if ((crtc_state->infoframes.enable &
1225		intel_hdmi_infoframe_enable(HDMI_INFOFRAME_TYPE_DRM)) == 0 &&
1226			(val & VIDEO_DIP_ENABLE_DRM_GLK) == 0)
1227		return;
1228
1229	val &= ~(VIDEO_DIP_ENABLE_DRM_GLK);
1230
1231	intel_de_write(display, reg, val);
1232	intel_de_posting_read(display, reg);
1233
1234	intel_write_infoframe(encoder, crtc_state,
1235			      HDMI_INFOFRAME_TYPE_DRM,
1236			      &crtc_state->infoframes.drm);
1237}
1238
1239static void hsw_set_infoframes(struct intel_encoder *encoder,
1240			       bool enable,
1241			       const struct intel_crtc_state *crtc_state,
1242			       const struct drm_connector_state *conn_state)
1243{
1244	struct intel_display *display = to_intel_display(encoder);
1245	i915_reg_t reg = HSW_TVIDEO_DIP_CTL(display,
1246					    crtc_state->cpu_transcoder);
1247	u32 val = intel_de_read(display, reg);
1248
1249	assert_hdmi_transcoder_func_disabled(display,
1250					     crtc_state->cpu_transcoder);
1251
1252	val &= ~(VIDEO_DIP_ENABLE_VSC_HSW | VIDEO_DIP_ENABLE_AVI_HSW |
1253		 VIDEO_DIP_ENABLE_GCP_HSW | VIDEO_DIP_ENABLE_VS_HSW |
1254		 VIDEO_DIP_ENABLE_GMP_HSW | VIDEO_DIP_ENABLE_SPD_HSW |
1255		 VIDEO_DIP_ENABLE_DRM_GLK | VIDEO_DIP_ENABLE_AS_ADL);
1256
1257	if (!enable) {
1258		intel_de_write(display, reg, val);
1259		intel_de_posting_read(display, reg);
1260		return;
1261	}
1262
1263	if (intel_hdmi_set_gcp_infoframe(encoder, crtc_state, conn_state))
1264		val |= VIDEO_DIP_ENABLE_GCP_HSW;
1265
1266	intel_de_write(display, reg, val);
1267	intel_de_posting_read(display, reg);
1268
1269	intel_write_infoframe(encoder, crtc_state,
1270			      HDMI_INFOFRAME_TYPE_AVI,
1271			      &crtc_state->infoframes.avi);
1272	intel_write_infoframe(encoder, crtc_state,
1273			      HDMI_INFOFRAME_TYPE_SPD,
1274			      &crtc_state->infoframes.spd);
1275	intel_write_infoframe(encoder, crtc_state,
1276			      HDMI_INFOFRAME_TYPE_VENDOR,
1277			      &crtc_state->infoframes.hdmi);
1278	intel_write_infoframe(encoder, crtc_state,
1279			      HDMI_INFOFRAME_TYPE_DRM,
1280			      &crtc_state->infoframes.drm);
1281}
1282
1283void intel_dp_dual_mode_set_tmds_output(struct intel_hdmi *hdmi, bool enable)
1284{
1285	struct intel_display *display = to_intel_display(hdmi);
1286	struct i2c_adapter *ddc = hdmi->attached_connector->base.ddc;
 
1287
1288	if (hdmi->dp_dual_mode.type < DRM_DP_DUAL_MODE_TYPE2_DVI)
1289		return;
1290
1291	drm_dbg_kms(display->drm, "%s DP dual mode adaptor TMDS output\n",
1292		    enable ? "Enabling" : "Disabling");
1293
1294	drm_dp_dual_mode_set_tmds_output(display->drm,
1295					 hdmi->dp_dual_mode.type, ddc, enable);
1296}
1297
1298static int intel_hdmi_hdcp_read(struct intel_digital_port *dig_port,
1299				unsigned int offset, void *buffer, size_t size)
1300{
 
1301	struct intel_hdmi *hdmi = &dig_port->hdmi;
1302	struct i2c_adapter *ddc = hdmi->attached_connector->base.ddc;
 
1303	int ret;
1304	u8 start = offset & 0xff;
1305	struct i2c_msg msgs[] = {
1306		{
1307			.addr = DRM_HDCP_DDC_ADDR,
1308			.flags = 0,
1309			.len = 1,
1310			.buf = &start,
1311		},
1312		{
1313			.addr = DRM_HDCP_DDC_ADDR,
1314			.flags = I2C_M_RD,
1315			.len = size,
1316			.buf = buffer
1317		}
1318	};
1319	ret = i2c_transfer(ddc, msgs, ARRAY_SIZE(msgs));
1320	if (ret == ARRAY_SIZE(msgs))
1321		return 0;
1322	return ret >= 0 ? -EIO : ret;
1323}
1324
1325static int intel_hdmi_hdcp_write(struct intel_digital_port *dig_port,
1326				 unsigned int offset, void *buffer, size_t size)
1327{
 
1328	struct intel_hdmi *hdmi = &dig_port->hdmi;
1329	struct i2c_adapter *ddc = hdmi->attached_connector->base.ddc;
 
1330	int ret;
1331	u8 *write_buf;
1332	struct i2c_msg msg;
1333
1334	write_buf = kzalloc(size + 1, GFP_KERNEL);
1335	if (!write_buf)
1336		return -ENOMEM;
1337
1338	write_buf[0] = offset & 0xff;
1339	memcpy(&write_buf[1], buffer, size);
1340
1341	msg.addr = DRM_HDCP_DDC_ADDR;
1342	msg.flags = 0;
1343	msg.len = size + 1;
1344	msg.buf = write_buf;
1345
1346	ret = i2c_transfer(ddc, &msg, 1);
1347	if (ret == 1)
1348		ret = 0;
1349	else if (ret >= 0)
1350		ret = -EIO;
1351
1352	kfree(write_buf);
1353	return ret;
1354}
1355
1356static
1357int intel_hdmi_hdcp_write_an_aksv(struct intel_digital_port *dig_port,
1358				  u8 *an)
1359{
1360	struct intel_display *display = to_intel_display(dig_port);
1361	struct intel_hdmi *hdmi = &dig_port->hdmi;
1362	struct i2c_adapter *ddc = hdmi->attached_connector->base.ddc;
 
1363	int ret;
1364
1365	ret = intel_hdmi_hdcp_write(dig_port, DRM_HDCP_DDC_AN, an,
1366				    DRM_HDCP_AN_LEN);
1367	if (ret) {
1368		drm_dbg_kms(display->drm, "Write An over DDC failed (%d)\n",
1369			    ret);
1370		return ret;
1371	}
1372
1373	ret = intel_gmbus_output_aksv(ddc);
1374	if (ret < 0) {
1375		drm_dbg_kms(display->drm, "Failed to output aksv (%d)\n", ret);
1376		return ret;
1377	}
1378	return 0;
1379}
1380
1381static int intel_hdmi_hdcp_read_bksv(struct intel_digital_port *dig_port,
1382				     u8 *bksv)
1383{
1384	struct intel_display *display = to_intel_display(dig_port);
1385
1386	int ret;
1387	ret = intel_hdmi_hdcp_read(dig_port, DRM_HDCP_DDC_BKSV, bksv,
1388				   DRM_HDCP_KSV_LEN);
1389	if (ret)
1390		drm_dbg_kms(display->drm, "Read Bksv over DDC failed (%d)\n",
1391			    ret);
1392	return ret;
1393}
1394
1395static
1396int intel_hdmi_hdcp_read_bstatus(struct intel_digital_port *dig_port,
1397				 u8 *bstatus)
1398{
1399	struct intel_display *display = to_intel_display(dig_port);
1400
1401	int ret;
1402	ret = intel_hdmi_hdcp_read(dig_port, DRM_HDCP_DDC_BSTATUS,
1403				   bstatus, DRM_HDCP_BSTATUS_LEN);
1404	if (ret)
1405		drm_dbg_kms(display->drm,
1406			    "Read bstatus over DDC failed (%d)\n",
1407			    ret);
1408	return ret;
1409}
1410
1411static
1412int intel_hdmi_hdcp_repeater_present(struct intel_digital_port *dig_port,
1413				     bool *repeater_present)
1414{
1415	struct intel_display *display = to_intel_display(dig_port);
1416	int ret;
1417	u8 val;
1418
1419	ret = intel_hdmi_hdcp_read(dig_port, DRM_HDCP_DDC_BCAPS, &val, 1);
1420	if (ret) {
1421		drm_dbg_kms(display->drm, "Read bcaps over DDC failed (%d)\n",
1422			    ret);
1423		return ret;
1424	}
1425	*repeater_present = val & DRM_HDCP_DDC_BCAPS_REPEATER_PRESENT;
1426	return 0;
1427}
1428
1429static
1430int intel_hdmi_hdcp_read_ri_prime(struct intel_digital_port *dig_port,
1431				  u8 *ri_prime)
1432{
1433	struct intel_display *display = to_intel_display(dig_port);
1434
1435	int ret;
1436	ret = intel_hdmi_hdcp_read(dig_port, DRM_HDCP_DDC_RI_PRIME,
1437				   ri_prime, DRM_HDCP_RI_LEN);
1438	if (ret)
1439		drm_dbg_kms(display->drm, "Read Ri' over DDC failed (%d)\n",
1440			    ret);
1441	return ret;
1442}
1443
1444static
1445int intel_hdmi_hdcp_read_ksv_ready(struct intel_digital_port *dig_port,
1446				   bool *ksv_ready)
1447{
1448	struct intel_display *display = to_intel_display(dig_port);
1449	int ret;
1450	u8 val;
1451
1452	ret = intel_hdmi_hdcp_read(dig_port, DRM_HDCP_DDC_BCAPS, &val, 1);
1453	if (ret) {
1454		drm_dbg_kms(display->drm, "Read bcaps over DDC failed (%d)\n",
1455			    ret);
1456		return ret;
1457	}
1458	*ksv_ready = val & DRM_HDCP_DDC_BCAPS_KSV_FIFO_READY;
1459	return 0;
1460}
1461
1462static
1463int intel_hdmi_hdcp_read_ksv_fifo(struct intel_digital_port *dig_port,
1464				  int num_downstream, u8 *ksv_fifo)
1465{
1466	struct intel_display *display = to_intel_display(dig_port);
1467	int ret;
1468	ret = intel_hdmi_hdcp_read(dig_port, DRM_HDCP_DDC_KSV_FIFO,
1469				   ksv_fifo, num_downstream * DRM_HDCP_KSV_LEN);
1470	if (ret) {
1471		drm_dbg_kms(display->drm,
1472			    "Read ksv fifo over DDC failed (%d)\n", ret);
1473		return ret;
1474	}
1475	return 0;
1476}
1477
1478static
1479int intel_hdmi_hdcp_read_v_prime_part(struct intel_digital_port *dig_port,
1480				      int i, u32 *part)
1481{
1482	struct intel_display *display = to_intel_display(dig_port);
1483	int ret;
1484
1485	if (i >= DRM_HDCP_V_PRIME_NUM_PARTS)
1486		return -EINVAL;
1487
1488	ret = intel_hdmi_hdcp_read(dig_port, DRM_HDCP_DDC_V_PRIME(i),
1489				   part, DRM_HDCP_V_PRIME_PART_LEN);
1490	if (ret)
1491		drm_dbg_kms(display->drm,
1492			    "Read V'[%d] over DDC failed (%d)\n",
1493			    i, ret);
1494	return ret;
1495}
1496
1497static int kbl_repositioning_enc_en_signal(struct intel_connector *connector,
1498					   enum transcoder cpu_transcoder)
1499{
1500	struct intel_display *display = to_intel_display(connector);
1501	struct intel_digital_port *dig_port = intel_attached_dig_port(connector);
1502	struct intel_crtc *crtc = to_intel_crtc(connector->base.state->crtc);
 
 
1503	u32 scanline;
1504	int ret;
1505
1506	for (;;) {
1507		scanline = intel_de_read(display,
1508					 PIPEDSL(display, crtc->pipe));
1509		if (scanline > 100 && scanline < 200)
1510			break;
1511		usleep_range(25, 50);
1512	}
1513
1514	ret = intel_ddi_toggle_hdcp_bits(&dig_port->base, cpu_transcoder,
1515					 false, TRANS_DDI_HDCP_SIGNALLING);
1516	if (ret) {
1517		drm_err(display->drm,
1518			"Disable HDCP signalling failed (%d)\n", ret);
1519		return ret;
1520	}
1521
1522	ret = intel_ddi_toggle_hdcp_bits(&dig_port->base, cpu_transcoder,
1523					 true, TRANS_DDI_HDCP_SIGNALLING);
1524	if (ret) {
1525		drm_err(display->drm,
1526			"Enable HDCP signalling failed (%d)\n", ret);
1527		return ret;
1528	}
1529
1530	return 0;
1531}
1532
1533static
1534int intel_hdmi_hdcp_toggle_signalling(struct intel_digital_port *dig_port,
1535				      enum transcoder cpu_transcoder,
1536				      bool enable)
1537{
1538	struct intel_display *display = to_intel_display(dig_port);
1539	struct intel_hdmi *hdmi = &dig_port->hdmi;
1540	struct intel_connector *connector = hdmi->attached_connector;
1541	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
1542	int ret;
1543
1544	if (!enable)
1545		usleep_range(6, 60); /* Bspec says >= 6us */
1546
1547	ret = intel_ddi_toggle_hdcp_bits(&dig_port->base,
1548					 cpu_transcoder, enable,
1549					 TRANS_DDI_HDCP_SIGNALLING);
1550	if (ret) {
1551		drm_err(display->drm, "%s HDCP signalling failed (%d)\n",
1552			enable ? "Enable" : "Disable", ret);
1553		return ret;
1554	}
1555
1556	/*
1557	 * WA: To fix incorrect positioning of the window of
1558	 * opportunity and enc_en signalling in KABYLAKE.
1559	 */
1560	if (IS_KABYLAKE(dev_priv) && enable)
1561		return kbl_repositioning_enc_en_signal(connector,
1562						       cpu_transcoder);
1563
1564	return 0;
1565}
1566
1567static
1568bool intel_hdmi_hdcp_check_link_once(struct intel_digital_port *dig_port,
1569				     struct intel_connector *connector)
1570{
1571	struct intel_display *display = to_intel_display(dig_port);
1572	struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev);
 
 
1573	enum port port = dig_port->base.port;
1574	enum transcoder cpu_transcoder = connector->hdcp.cpu_transcoder;
1575	int ret;
1576	union {
1577		u32 reg;
1578		u8 shim[DRM_HDCP_RI_LEN];
1579	} ri;
1580
1581	ret = intel_hdmi_hdcp_read_ri_prime(dig_port, ri.shim);
1582	if (ret)
1583		return false;
1584
1585	intel_de_write(i915, HDCP_RPRIME(i915, cpu_transcoder, port), ri.reg);
1586
1587	/* Wait for Ri prime match */
1588	if (wait_for((intel_de_read(i915, HDCP_STATUS(i915, cpu_transcoder, port)) &
1589		      (HDCP_STATUS_RI_MATCH | HDCP_STATUS_ENC)) ==
1590		     (HDCP_STATUS_RI_MATCH | HDCP_STATUS_ENC), 1)) {
1591		drm_dbg_kms(display->drm, "Ri' mismatch detected (%x)\n",
1592			    intel_de_read(i915, HDCP_STATUS(i915, cpu_transcoder,
1593							    port)));
1594		return false;
1595	}
1596	return true;
1597}
1598
1599static
1600bool intel_hdmi_hdcp_check_link(struct intel_digital_port *dig_port,
1601				struct intel_connector *connector)
1602{
1603	struct intel_display *display = to_intel_display(dig_port);
1604	int retry;
1605
1606	for (retry = 0; retry < 3; retry++)
1607		if (intel_hdmi_hdcp_check_link_once(dig_port, connector))
1608			return true;
1609
1610	drm_err(display->drm, "Link check failed\n");
1611	return false;
1612}
1613
1614struct hdcp2_hdmi_msg_timeout {
1615	u8 msg_id;
1616	u16 timeout;
1617};
1618
1619static const struct hdcp2_hdmi_msg_timeout hdcp2_msg_timeout[] = {
1620	{ HDCP_2_2_AKE_SEND_CERT, HDCP_2_2_CERT_TIMEOUT_MS, },
1621	{ HDCP_2_2_AKE_SEND_PAIRING_INFO, HDCP_2_2_PAIRING_TIMEOUT_MS, },
1622	{ HDCP_2_2_LC_SEND_LPRIME, HDCP_2_2_HDMI_LPRIME_TIMEOUT_MS, },
1623	{ HDCP_2_2_REP_SEND_RECVID_LIST, HDCP_2_2_RECVID_LIST_TIMEOUT_MS, },
1624	{ HDCP_2_2_REP_STREAM_READY, HDCP_2_2_STREAM_READY_TIMEOUT_MS, },
1625};
1626
1627static
1628int intel_hdmi_hdcp2_read_rx_status(struct intel_digital_port *dig_port,
1629				    u8 *rx_status)
1630{
1631	return intel_hdmi_hdcp_read(dig_port,
1632				    HDCP_2_2_HDMI_REG_RXSTATUS_OFFSET,
1633				    rx_status,
1634				    HDCP_2_2_HDMI_RXSTATUS_LEN);
1635}
1636
1637static int get_hdcp2_msg_timeout(u8 msg_id, bool is_paired)
1638{
1639	int i;
1640
1641	if (msg_id == HDCP_2_2_AKE_SEND_HPRIME) {
1642		if (is_paired)
1643			return HDCP_2_2_HPRIME_PAIRED_TIMEOUT_MS;
1644		else
1645			return HDCP_2_2_HPRIME_NO_PAIRED_TIMEOUT_MS;
1646	}
1647
1648	for (i = 0; i < ARRAY_SIZE(hdcp2_msg_timeout); i++) {
1649		if (hdcp2_msg_timeout[i].msg_id == msg_id)
1650			return hdcp2_msg_timeout[i].timeout;
1651	}
1652
1653	return -EINVAL;
1654}
1655
1656static int
1657hdcp2_detect_msg_availability(struct intel_digital_port *dig_port,
1658			      u8 msg_id, bool *msg_ready,
1659			      ssize_t *msg_sz)
1660{
1661	struct intel_display *display = to_intel_display(dig_port);
1662	u8 rx_status[HDCP_2_2_HDMI_RXSTATUS_LEN];
1663	int ret;
1664
1665	ret = intel_hdmi_hdcp2_read_rx_status(dig_port, rx_status);
1666	if (ret < 0) {
1667		drm_dbg_kms(display->drm, "rx_status read failed. Err %d\n",
1668			    ret);
1669		return ret;
1670	}
1671
1672	*msg_sz = ((HDCP_2_2_HDMI_RXSTATUS_MSG_SZ_HI(rx_status[1]) << 8) |
1673		  rx_status[0]);
1674
1675	if (msg_id == HDCP_2_2_REP_SEND_RECVID_LIST)
1676		*msg_ready = (HDCP_2_2_HDMI_RXSTATUS_READY(rx_status[1]) &&
1677			     *msg_sz);
1678	else
1679		*msg_ready = *msg_sz;
1680
1681	return 0;
1682}
1683
1684static ssize_t
1685intel_hdmi_hdcp2_wait_for_msg(struct intel_digital_port *dig_port,
1686			      u8 msg_id, bool paired)
1687{
1688	struct intel_display *display = to_intel_display(dig_port);
1689	bool msg_ready = false;
1690	int timeout, ret;
1691	ssize_t msg_sz = 0;
1692
1693	timeout = get_hdcp2_msg_timeout(msg_id, paired);
1694	if (timeout < 0)
1695		return timeout;
1696
1697	ret = __wait_for(ret = hdcp2_detect_msg_availability(dig_port,
1698							     msg_id, &msg_ready,
1699							     &msg_sz),
1700			 !ret && msg_ready && msg_sz, timeout * 1000,
1701			 1000, 5 * 1000);
1702	if (ret)
1703		drm_dbg_kms(display->drm,
1704			    "msg_id: %d, ret: %d, timeout: %d\n",
1705			    msg_id, ret, timeout);
1706
1707	return ret ? ret : msg_sz;
1708}
1709
1710static
1711int intel_hdmi_hdcp2_write_msg(struct intel_connector *connector,
1712			       void *buf, size_t size)
1713{
1714	struct intel_digital_port *dig_port = intel_attached_dig_port(connector);
1715	unsigned int offset;
1716
1717	offset = HDCP_2_2_HDMI_REG_WR_MSG_OFFSET;
1718	return intel_hdmi_hdcp_write(dig_port, offset, buf, size);
1719}
1720
1721static
1722int intel_hdmi_hdcp2_read_msg(struct intel_connector *connector,
1723			      u8 msg_id, void *buf, size_t size)
1724{
1725	struct intel_display *display = to_intel_display(connector);
1726	struct intel_digital_port *dig_port = intel_attached_dig_port(connector);
1727	struct intel_hdmi *hdmi = &dig_port->hdmi;
1728	struct intel_hdcp *hdcp = &hdmi->attached_connector->hdcp;
1729	unsigned int offset;
1730	ssize_t ret;
1731
1732	ret = intel_hdmi_hdcp2_wait_for_msg(dig_port, msg_id,
1733					    hdcp->is_paired);
1734	if (ret < 0)
1735		return ret;
1736
1737	/*
1738	 * Available msg size should be equal to or lesser than the
1739	 * available buffer.
1740	 */
1741	if (ret > size) {
1742		drm_dbg_kms(display->drm,
1743			    "msg_sz(%zd) is more than exp size(%zu)\n",
1744			    ret, size);
1745		return -EINVAL;
1746	}
1747
1748	offset = HDCP_2_2_HDMI_REG_RD_MSG_OFFSET;
1749	ret = intel_hdmi_hdcp_read(dig_port, offset, buf, ret);
1750	if (ret)
1751		drm_dbg_kms(display->drm, "Failed to read msg_id: %d(%zd)\n",
1752			    msg_id, ret);
1753
1754	return ret;
1755}
1756
1757static
1758int intel_hdmi_hdcp2_check_link(struct intel_digital_port *dig_port,
1759				struct intel_connector *connector)
1760{
1761	u8 rx_status[HDCP_2_2_HDMI_RXSTATUS_LEN];
1762	int ret;
1763
1764	ret = intel_hdmi_hdcp2_read_rx_status(dig_port, rx_status);
1765	if (ret)
1766		return ret;
1767
1768	/*
1769	 * Re-auth request and Link Integrity Failures are represented by
1770	 * same bit. i.e reauth_req.
1771	 */
1772	if (HDCP_2_2_HDMI_RXSTATUS_REAUTH_REQ(rx_status[1]))
1773		ret = HDCP_REAUTH_REQUEST;
1774	else if (HDCP_2_2_HDMI_RXSTATUS_READY(rx_status[1]))
1775		ret = HDCP_TOPOLOGY_CHANGE;
1776
1777	return ret;
1778}
1779
1780static
1781int intel_hdmi_hdcp2_get_capability(struct intel_connector *connector,
1782				    bool *capable)
1783{
1784	struct intel_digital_port *dig_port = intel_attached_dig_port(connector);
1785	u8 hdcp2_version;
1786	int ret;
1787
1788	*capable = false;
1789	ret = intel_hdmi_hdcp_read(dig_port, HDCP_2_2_HDMI_REG_VER_OFFSET,
1790				   &hdcp2_version, sizeof(hdcp2_version));
1791	if (!ret && hdcp2_version & HDCP_2_2_HDMI_SUPPORT_MASK)
1792		*capable = true;
1793
1794	return ret;
1795}
1796
1797static const struct intel_hdcp_shim intel_hdmi_hdcp_shim = {
1798	.write_an_aksv = intel_hdmi_hdcp_write_an_aksv,
1799	.read_bksv = intel_hdmi_hdcp_read_bksv,
1800	.read_bstatus = intel_hdmi_hdcp_read_bstatus,
1801	.repeater_present = intel_hdmi_hdcp_repeater_present,
1802	.read_ri_prime = intel_hdmi_hdcp_read_ri_prime,
1803	.read_ksv_ready = intel_hdmi_hdcp_read_ksv_ready,
1804	.read_ksv_fifo = intel_hdmi_hdcp_read_ksv_fifo,
1805	.read_v_prime_part = intel_hdmi_hdcp_read_v_prime_part,
1806	.toggle_signalling = intel_hdmi_hdcp_toggle_signalling,
1807	.check_link = intel_hdmi_hdcp_check_link,
1808	.write_2_2_msg = intel_hdmi_hdcp2_write_msg,
1809	.read_2_2_msg = intel_hdmi_hdcp2_read_msg,
1810	.check_2_2_link	= intel_hdmi_hdcp2_check_link,
1811	.hdcp_2_2_get_capability = intel_hdmi_hdcp2_get_capability,
1812	.protocol = HDCP_PROTOCOL_HDMI,
1813};
1814
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1815static int intel_hdmi_source_max_tmds_clock(struct intel_encoder *encoder)
1816{
1817	struct intel_display *display = to_intel_display(encoder);
1818	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
1819	int max_tmds_clock, vbt_max_tmds_clock;
1820
1821	if (DISPLAY_VER(display) >= 13 || IS_ALDERLAKE_S(dev_priv))
1822		max_tmds_clock = 600000;
1823	else if (DISPLAY_VER(display) >= 10)
1824		max_tmds_clock = 594000;
1825	else if (DISPLAY_VER(display) >= 8 || IS_HASWELL(dev_priv))
1826		max_tmds_clock = 300000;
1827	else if (DISPLAY_VER(display) >= 5)
1828		max_tmds_clock = 225000;
1829	else
1830		max_tmds_clock = 165000;
1831
1832	vbt_max_tmds_clock = intel_bios_hdmi_max_tmds_clock(encoder->devdata);
1833	if (vbt_max_tmds_clock)
1834		max_tmds_clock = min(max_tmds_clock, vbt_max_tmds_clock);
1835
1836	return max_tmds_clock;
1837}
1838
1839static bool intel_has_hdmi_sink(struct intel_hdmi *hdmi,
1840				const struct drm_connector_state *conn_state)
1841{
1842	struct intel_connector *connector = hdmi->attached_connector;
1843
1844	return connector->base.display_info.is_hdmi &&
1845		READ_ONCE(to_intel_digital_connector_state(conn_state)->force_audio) != HDMI_AUDIO_OFF_DVI;
1846}
1847
1848static bool intel_hdmi_is_ycbcr420(const struct intel_crtc_state *crtc_state)
1849{
1850	return crtc_state->output_format == INTEL_OUTPUT_FORMAT_YCBCR420;
1851}
1852
1853static int hdmi_port_clock_limit(struct intel_hdmi *hdmi,
1854				 bool respect_downstream_limits,
1855				 bool has_hdmi_sink)
1856{
1857	struct intel_encoder *encoder = &hdmi_to_dig_port(hdmi)->base;
1858	int max_tmds_clock = intel_hdmi_source_max_tmds_clock(encoder);
1859
1860	if (respect_downstream_limits) {
1861		struct intel_connector *connector = hdmi->attached_connector;
1862		const struct drm_display_info *info = &connector->base.display_info;
1863
1864		if (hdmi->dp_dual_mode.max_tmds_clock)
1865			max_tmds_clock = min(max_tmds_clock,
1866					     hdmi->dp_dual_mode.max_tmds_clock);
1867
1868		if (info->max_tmds_clock)
1869			max_tmds_clock = min(max_tmds_clock,
1870					     info->max_tmds_clock);
1871		else if (!has_hdmi_sink)
1872			max_tmds_clock = min(max_tmds_clock, 165000);
1873	}
1874
1875	return max_tmds_clock;
1876}
1877
1878static enum drm_mode_status
1879hdmi_port_clock_valid(struct intel_hdmi *hdmi,
1880		      int clock, bool respect_downstream_limits,
1881		      bool has_hdmi_sink)
1882{
1883	struct intel_display *display = to_intel_display(hdmi);
1884	struct drm_i915_private *dev_priv = to_i915(display->drm);
1885	struct intel_encoder *encoder = &hdmi_to_dig_port(hdmi)->base;
1886
1887	if (clock < 25000)
1888		return MODE_CLOCK_LOW;
1889	if (clock > hdmi_port_clock_limit(hdmi, respect_downstream_limits,
1890					  has_hdmi_sink))
1891		return MODE_CLOCK_HIGH;
1892
1893	/* GLK DPLL can't generate 446-480 MHz */
1894	if (IS_GEMINILAKE(dev_priv) && clock > 446666 && clock < 480000)
1895		return MODE_CLOCK_RANGE;
1896
1897	/* BXT/GLK DPLL can't generate 223-240 MHz */
1898	if ((IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv)) &&
1899	    clock > 223333 && clock < 240000)
1900		return MODE_CLOCK_RANGE;
1901
1902	/* CHV DPLL can't generate 216-240 MHz */
1903	if (IS_CHERRYVIEW(dev_priv) && clock > 216000 && clock < 240000)
1904		return MODE_CLOCK_RANGE;
1905
1906	/* ICL+ combo PHY PLL can't generate 500-533.2 MHz */
1907	if (intel_encoder_is_combo(encoder) && clock > 500000 && clock < 533200)
1908		return MODE_CLOCK_RANGE;
1909
1910	/* ICL+ TC PHY PLL can't generate 500-532.8 MHz */
1911	if (intel_encoder_is_tc(encoder) && clock > 500000 && clock < 532800)
1912		return MODE_CLOCK_RANGE;
1913
1914	/*
1915	 * SNPS PHYs' MPLLB table-based programming can only handle a fixed
1916	 * set of link rates.
1917	 *
1918	 * FIXME: We will hopefully get an algorithmic way of programming
1919	 * the MPLLB for HDMI in the future.
1920	 */
1921	if (DISPLAY_VER(display) >= 14)
1922		return intel_cx0_phy_check_hdmi_link_rate(hdmi, clock);
1923	else if (IS_DG2(dev_priv))
1924		return intel_snps_phy_check_hdmi_link_rate(clock);
1925
1926	return MODE_OK;
1927}
1928
1929int intel_hdmi_tmds_clock(int clock, int bpc,
1930			  enum intel_output_format sink_format)
1931{
1932	/* YCBCR420 TMDS rate requirement is half the pixel clock */
1933	if (sink_format == INTEL_OUTPUT_FORMAT_YCBCR420)
1934		clock /= 2;
1935
1936	/*
1937	 * Need to adjust the port link by:
1938	 *  1.5x for 12bpc
1939	 *  1.25x for 10bpc
1940	 */
1941	return DIV_ROUND_CLOSEST(clock * bpc, 8);
1942}
1943
1944static bool intel_hdmi_source_bpc_possible(struct intel_display *display, int bpc)
1945{
1946	switch (bpc) {
1947	case 12:
1948		return !HAS_GMCH(display);
1949	case 10:
1950		return DISPLAY_VER(display) >= 11;
1951	case 8:
1952		return true;
1953	default:
1954		MISSING_CASE(bpc);
1955		return false;
1956	}
1957}
1958
1959static bool intel_hdmi_sink_bpc_possible(struct drm_connector *connector,
1960					 int bpc, bool has_hdmi_sink,
1961					 enum intel_output_format sink_format)
1962{
1963	const struct drm_display_info *info = &connector->display_info;
1964	const struct drm_hdmi_info *hdmi = &info->hdmi;
1965
1966	switch (bpc) {
1967	case 12:
1968		if (!has_hdmi_sink)
1969			return false;
1970
1971		if (sink_format == INTEL_OUTPUT_FORMAT_YCBCR420)
1972			return hdmi->y420_dc_modes & DRM_EDID_YCBCR420_DC_36;
1973		else
1974			return info->edid_hdmi_rgb444_dc_modes & DRM_EDID_HDMI_DC_36;
1975	case 10:
1976		if (!has_hdmi_sink)
1977			return false;
1978
1979		if (sink_format == INTEL_OUTPUT_FORMAT_YCBCR420)
1980			return hdmi->y420_dc_modes & DRM_EDID_YCBCR420_DC_30;
1981		else
1982			return info->edid_hdmi_rgb444_dc_modes & DRM_EDID_HDMI_DC_30;
1983	case 8:
1984		return true;
1985	default:
1986		MISSING_CASE(bpc);
1987		return false;
1988	}
1989}
1990
1991static enum drm_mode_status
1992intel_hdmi_mode_clock_valid(struct drm_connector *connector, int clock,
1993			    bool has_hdmi_sink,
1994			    enum intel_output_format sink_format)
1995{
1996	struct intel_display *display = to_intel_display(connector->dev);
1997	struct intel_hdmi *hdmi = intel_attached_hdmi(to_intel_connector(connector));
1998	enum drm_mode_status status = MODE_OK;
1999	int bpc;
2000
2001	/*
2002	 * Try all color depths since valid port clock range
2003	 * can have holes. Any mode that can be used with at
2004	 * least one color depth is accepted.
2005	 */
2006	for (bpc = 12; bpc >= 8; bpc -= 2) {
2007		int tmds_clock = intel_hdmi_tmds_clock(clock, bpc, sink_format);
2008
2009		if (!intel_hdmi_source_bpc_possible(display, bpc))
2010			continue;
2011
2012		if (!intel_hdmi_sink_bpc_possible(connector, bpc, has_hdmi_sink, sink_format))
2013			continue;
2014
2015		status = hdmi_port_clock_valid(hdmi, tmds_clock, true, has_hdmi_sink);
2016		if (status == MODE_OK)
2017			return MODE_OK;
2018	}
2019
2020	/* can never happen */
2021	drm_WARN_ON(display->drm, status == MODE_OK);
2022
2023	return status;
2024}
2025
2026static enum drm_mode_status
2027intel_hdmi_mode_valid(struct drm_connector *connector,
2028		      struct drm_display_mode *mode)
2029{
2030	struct intel_display *display = to_intel_display(connector->dev);
2031	struct intel_hdmi *hdmi = intel_attached_hdmi(to_intel_connector(connector));
2032	struct drm_i915_private *dev_priv = to_i915(display->drm);
 
2033	enum drm_mode_status status;
2034	int clock = mode->clock;
2035	int max_dotclk = to_i915(connector->dev)->display.cdclk.max_dotclk_freq;
2036	bool has_hdmi_sink = intel_has_hdmi_sink(hdmi, connector->state);
2037	bool ycbcr_420_only;
2038	enum intel_output_format sink_format;
2039
2040	status = intel_cpu_transcoder_mode_valid(dev_priv, mode);
2041	if (status != MODE_OK)
2042		return status;
2043
2044	if ((mode->flags & DRM_MODE_FLAG_3D_MASK) == DRM_MODE_FLAG_3D_FRAME_PACKING)
2045		clock *= 2;
2046
2047	if (clock > max_dotclk)
2048		return MODE_CLOCK_HIGH;
2049
2050	if (mode->flags & DRM_MODE_FLAG_DBLCLK) {
2051		if (!has_hdmi_sink)
2052			return MODE_CLOCK_LOW;
2053		clock *= 2;
2054	}
2055
2056	/*
2057	 * HDMI2.1 requires higher resolution modes like 8k60, 4K120 to be
2058	 * enumerated only if FRL is supported. Current platforms do not support
2059	 * FRL so prune the higher resolution modes that require doctclock more
2060	 * than 600MHz.
2061	 */
2062	if (clock > 600000)
2063		return MODE_CLOCK_HIGH;
2064
2065	ycbcr_420_only = drm_mode_is_420_only(&connector->display_info, mode);
2066
2067	if (ycbcr_420_only)
2068		sink_format = INTEL_OUTPUT_FORMAT_YCBCR420;
2069	else
2070		sink_format = INTEL_OUTPUT_FORMAT_RGB;
2071
2072	status = intel_hdmi_mode_clock_valid(connector, clock, has_hdmi_sink, sink_format);
2073	if (status != MODE_OK) {
2074		if (ycbcr_420_only ||
2075		    !connector->ycbcr_420_allowed ||
2076		    !drm_mode_is_420_also(&connector->display_info, mode))
2077			return status;
2078
2079		sink_format = INTEL_OUTPUT_FORMAT_YCBCR420;
2080		status = intel_hdmi_mode_clock_valid(connector, clock, has_hdmi_sink, sink_format);
2081		if (status != MODE_OK)
2082			return status;
 
 
 
 
 
 
2083	}
 
 
2084
2085	return intel_mode_valid_max_plane_size(dev_priv, mode, 1);
2086}
2087
2088bool intel_hdmi_bpc_possible(const struct intel_crtc_state *crtc_state,
2089			     int bpc, bool has_hdmi_sink)
2090{
 
 
2091	struct drm_atomic_state *state = crtc_state->uapi.state;
2092	struct drm_connector_state *connector_state;
2093	struct drm_connector *connector;
 
 
2094	int i;
2095
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2096	for_each_new_connector_in_state(state, connector, connector_state, i) {
 
 
2097		if (connector_state->crtc != crtc_state->uapi.crtc)
2098			continue;
2099
2100		if (!intel_hdmi_sink_bpc_possible(connector, bpc, has_hdmi_sink,
2101						  crtc_state->sink_format))
2102			return false;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2103	}
2104
 
 
 
 
 
 
 
2105	return true;
2106}
2107
2108static bool hdmi_bpc_possible(const struct intel_crtc_state *crtc_state, int bpc)
 
 
2109{
2110	struct intel_display *display = to_intel_display(crtc_state);
 
2111	const struct drm_display_mode *adjusted_mode =
2112		&crtc_state->hw.adjusted_mode;
2113
2114	if (!intel_hdmi_source_bpc_possible(display, bpc))
2115		return false;
2116
2117	/* Display Wa_1405510057:icl,ehl */
2118	if (intel_hdmi_is_ycbcr420(crtc_state) &&
2119	    bpc == 10 && DISPLAY_VER(display) == 11 &&
2120	    (adjusted_mode->crtc_hblank_end -
2121	     adjusted_mode->crtc_hblank_start) % 8 == 2)
2122		return false;
 
2123
2124	return intel_hdmi_bpc_possible(crtc_state, bpc, crtc_state->has_hdmi_sink);
 
 
 
 
 
 
 
 
 
 
2125}
2126
2127static int intel_hdmi_compute_bpc(struct intel_encoder *encoder,
2128				  struct intel_crtc_state *crtc_state,
2129				  int clock, bool respect_downstream_limits)
2130{
2131	struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
2132	int bpc;
2133
2134	/*
2135	 * pipe_bpp could already be below 8bpc due to FDI
2136	 * bandwidth constraints. HDMI minimum is 8bpc however.
2137	 */
2138	bpc = max(crtc_state->pipe_bpp / 3, 8);
2139
2140	/*
2141	 * We will never exceed downstream TMDS clock limits while
2142	 * attempting deep color. If the user insists on forcing an
2143	 * out of spec mode they will have to be satisfied with 8bpc.
2144	 */
2145	if (!respect_downstream_limits)
2146		bpc = 8;
2147
2148	for (; bpc >= 8; bpc -= 2) {
2149		int tmds_clock = intel_hdmi_tmds_clock(clock, bpc,
2150						       crtc_state->sink_format);
2151
2152		if (hdmi_bpc_possible(crtc_state, bpc) &&
2153		    hdmi_port_clock_valid(intel_hdmi, tmds_clock,
2154					  respect_downstream_limits,
2155					  crtc_state->has_hdmi_sink) == MODE_OK)
2156			return bpc;
2157	}
2158
2159	return -EINVAL;
2160}
2161
2162static int intel_hdmi_compute_clock(struct intel_encoder *encoder,
2163				    struct intel_crtc_state *crtc_state,
2164				    bool respect_downstream_limits)
2165{
2166	struct intel_display *display = to_intel_display(encoder);
 
2167	const struct drm_display_mode *adjusted_mode =
2168		&crtc_state->hw.adjusted_mode;
2169	int bpc, clock = adjusted_mode->crtc_clock;
2170
2171	if (adjusted_mode->flags & DRM_MODE_FLAG_DBLCLK)
2172		clock *= 2;
2173
2174	bpc = intel_hdmi_compute_bpc(encoder, crtc_state, clock,
2175				     respect_downstream_limits);
2176	if (bpc < 0)
2177		return bpc;
 
2178
2179	crtc_state->port_clock =
2180		intel_hdmi_tmds_clock(clock, bpc, crtc_state->sink_format);
2181
2182	/*
2183	 * pipe_bpp could already be below 8bpc due to
2184	 * FDI bandwidth constraints. We shouldn't bump it
2185	 * back up to the HDMI minimum 8bpc in that case.
2186	 */
2187	crtc_state->pipe_bpp = min(crtc_state->pipe_bpp, bpc * 3);
 
2188
2189	drm_dbg_kms(display->drm,
2190		    "picking %d bpc for HDMI output (pipe bpp: %d)\n",
2191		    bpc, crtc_state->pipe_bpp);
2192
 
 
 
 
 
 
 
 
2193	return 0;
2194}
2195
2196bool intel_hdmi_limited_color_range(const struct intel_crtc_state *crtc_state,
2197				    const struct drm_connector_state *conn_state)
2198{
2199	const struct intel_digital_connector_state *intel_conn_state =
2200		to_intel_digital_connector_state(conn_state);
2201	const struct drm_display_mode *adjusted_mode =
2202		&crtc_state->hw.adjusted_mode;
2203
2204	/*
2205	 * Our YCbCr output is always limited range.
2206	 * crtc_state->limited_color_range only applies to RGB,
2207	 * and it must never be set for YCbCr or we risk setting
2208	 * some conflicting bits in TRANSCONF which will mess up
2209	 * the colors on the monitor.
2210	 */
2211	if (crtc_state->output_format != INTEL_OUTPUT_FORMAT_RGB)
2212		return false;
2213
2214	if (intel_conn_state->broadcast_rgb == INTEL_BROADCAST_RGB_AUTO) {
2215		/* See CEA-861-E - 5.1 Default Encoding Parameters */
2216		return crtc_state->has_hdmi_sink &&
2217			drm_default_rgb_quant_range(adjusted_mode) ==
2218			HDMI_QUANTIZATION_RANGE_LIMITED;
2219	} else {
2220		return intel_conn_state->broadcast_rgb == INTEL_BROADCAST_RGB_LIMITED;
2221	}
2222}
2223
2224static bool intel_hdmi_has_audio(struct intel_encoder *encoder,
2225				 const struct intel_crtc_state *crtc_state,
2226				 const struct drm_connector_state *conn_state)
2227{
2228	struct drm_connector *connector = conn_state->connector;
2229	const struct intel_digital_connector_state *intel_conn_state =
2230		to_intel_digital_connector_state(conn_state);
2231
2232	if (!crtc_state->has_hdmi_sink)
2233		return false;
2234
2235	if (intel_conn_state->force_audio == HDMI_AUDIO_AUTO)
2236		return connector->display_info.has_audio;
2237	else
2238		return intel_conn_state->force_audio == HDMI_AUDIO_ON;
2239}
2240
2241static enum intel_output_format
2242intel_hdmi_sink_format(const struct intel_crtc_state *crtc_state,
2243		       struct intel_connector *connector,
2244		       bool ycbcr_420_output)
2245{
2246	if (!crtc_state->has_hdmi_sink)
2247		return INTEL_OUTPUT_FORMAT_RGB;
2248
2249	if (connector->base.ycbcr_420_allowed && ycbcr_420_output)
2250		return INTEL_OUTPUT_FORMAT_YCBCR420;
2251	else
2252		return INTEL_OUTPUT_FORMAT_RGB;
2253}
2254
2255static enum intel_output_format
2256intel_hdmi_output_format(const struct intel_crtc_state *crtc_state)
2257{
2258	return crtc_state->sink_format;
2259}
2260
2261static int intel_hdmi_compute_output_format(struct intel_encoder *encoder,
2262					    struct intel_crtc_state *crtc_state,
2263					    const struct drm_connector_state *conn_state,
2264					    bool respect_downstream_limits)
2265{
2266	struct intel_display *display = to_intel_display(encoder);
2267	struct intel_connector *connector = to_intel_connector(conn_state->connector);
2268	const struct drm_display_mode *adjusted_mode = &crtc_state->hw.adjusted_mode;
2269	const struct drm_display_info *info = &connector->base.display_info;
2270	bool ycbcr_420_only = drm_mode_is_420_only(info, adjusted_mode);
2271	int ret;
2272
2273	crtc_state->sink_format =
2274		intel_hdmi_sink_format(crtc_state, connector, ycbcr_420_only);
2275
2276	if (ycbcr_420_only && crtc_state->sink_format != INTEL_OUTPUT_FORMAT_YCBCR420) {
2277		drm_dbg_kms(display->drm,
2278			    "YCbCr 4:2:0 mode but YCbCr 4:2:0 output not possible. Falling back to RGB.\n");
2279		crtc_state->sink_format = INTEL_OUTPUT_FORMAT_RGB;
2280	}
2281
2282	crtc_state->output_format = intel_hdmi_output_format(crtc_state);
2283	ret = intel_hdmi_compute_clock(encoder, crtc_state, respect_downstream_limits);
2284	if (ret) {
2285		if (crtc_state->sink_format == INTEL_OUTPUT_FORMAT_YCBCR420 ||
2286		    !crtc_state->has_hdmi_sink ||
2287		    !connector->base.ycbcr_420_allowed ||
2288		    !drm_mode_is_420_also(info, adjusted_mode))
2289			return ret;
2290
2291		crtc_state->sink_format = INTEL_OUTPUT_FORMAT_YCBCR420;
2292		crtc_state->output_format = intel_hdmi_output_format(crtc_state);
2293		ret = intel_hdmi_compute_clock(encoder, crtc_state, respect_downstream_limits);
2294	}
2295
2296	return ret;
2297}
2298
2299static bool intel_hdmi_is_cloned(const struct intel_crtc_state *crtc_state)
2300{
2301	return crtc_state->uapi.encoder_mask &&
2302		!is_power_of_2(crtc_state->uapi.encoder_mask);
2303}
2304
2305static bool source_supports_scrambling(struct intel_encoder *encoder)
2306{
2307	/*
2308	 * Gen 10+ support HDMI 2.0 : the max tmds clock is 594MHz, and
2309	 * scrambling is supported.
2310	 * But there seem to be cases where certain platforms that support
2311	 * HDMI 2.0, have an HDMI1.4 retimer chip, and the max tmds clock is
2312	 * capped by VBT to less than 340MHz.
2313	 *
2314	 * In such cases when an HDMI2.0 sink is connected, it creates a
2315	 * problem : the platform and the sink both support scrambling but the
2316	 * HDMI 1.4 retimer chip doesn't.
2317	 *
2318	 * So go for scrambling, based on the max tmds clock taking into account,
2319	 * restrictions coming from VBT.
2320	 */
2321	return intel_hdmi_source_max_tmds_clock(encoder) > 340000;
2322}
2323
2324bool intel_hdmi_compute_has_hdmi_sink(struct intel_encoder *encoder,
2325				      const struct intel_crtc_state *crtc_state,
2326				      const struct drm_connector_state *conn_state)
2327{
2328	struct intel_hdmi *hdmi = enc_to_intel_hdmi(encoder);
2329
2330	return intel_has_hdmi_sink(hdmi, conn_state) &&
2331		!intel_hdmi_is_cloned(crtc_state);
2332}
2333
2334int intel_hdmi_compute_config(struct intel_encoder *encoder,
2335			      struct intel_crtc_state *pipe_config,
2336			      struct drm_connector_state *conn_state)
2337{
2338	struct intel_display *display = to_intel_display(encoder);
 
2339	struct drm_display_mode *adjusted_mode = &pipe_config->hw.adjusted_mode;
2340	struct drm_connector *connector = conn_state->connector;
2341	struct drm_scdc *scdc = &connector->display_info.hdmi.scdc;
 
 
2342	int ret;
2343
2344	if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN)
2345		return -EINVAL;
2346
2347	if (!connector->interlace_allowed &&
2348	    adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE)
2349		return -EINVAL;
2350
2351	pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB;
 
 
2352
2353	if (pipe_config->has_hdmi_sink)
2354		pipe_config->has_infoframe = true;
2355
2356	if (adjusted_mode->flags & DRM_MODE_FLAG_DBLCLK)
2357		pipe_config->pixel_multiplier = 2;
2358
2359	pipe_config->has_audio =
2360		intel_hdmi_has_audio(encoder, pipe_config, conn_state) &&
2361		intel_audio_compute_config(encoder, pipe_config, conn_state);
2362
2363	/*
2364	 * Try to respect downstream TMDS clock limits first, if
2365	 * that fails assume the user might know something we don't.
2366	 */
2367	ret = intel_hdmi_compute_output_format(encoder, pipe_config, conn_state, true);
2368	if (ret)
2369		ret = intel_hdmi_compute_output_format(encoder, pipe_config, conn_state, false);
2370	if (ret) {
2371		drm_dbg_kms(display->drm,
2372			    "unsupported HDMI clock (%d kHz), rejecting mode\n",
2373			    pipe_config->hw.adjusted_mode.crtc_clock);
2374		return ret;
2375	}
2376
2377	if (intel_hdmi_is_ycbcr420(pipe_config)) {
2378		ret = intel_panel_fitting(pipe_config, conn_state);
2379		if (ret)
2380			return ret;
2381	}
2382
2383	pipe_config->limited_color_range =
2384		intel_hdmi_limited_color_range(pipe_config, conn_state);
2385
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2386	if (conn_state->picture_aspect_ratio)
2387		adjusted_mode->picture_aspect_ratio =
2388			conn_state->picture_aspect_ratio;
2389
2390	pipe_config->lane_count = 4;
2391
2392	if (scdc->scrambling.supported && source_supports_scrambling(encoder)) {
 
2393		if (scdc->scrambling.low_rates)
2394			pipe_config->hdmi_scrambling = true;
2395
2396		if (pipe_config->port_clock > 340000) {
2397			pipe_config->hdmi_scrambling = true;
2398			pipe_config->hdmi_high_tmds_clock_ratio = true;
2399		}
2400	}
2401
2402	intel_hdmi_compute_gcp_infoframe(encoder, pipe_config,
2403					 conn_state);
2404
2405	if (!intel_hdmi_compute_avi_infoframe(encoder, pipe_config, conn_state)) {
2406		drm_dbg_kms(display->drm, "bad AVI infoframe\n");
2407		return -EINVAL;
2408	}
2409
2410	if (!intel_hdmi_compute_spd_infoframe(encoder, pipe_config, conn_state)) {
2411		drm_dbg_kms(display->drm, "bad SPD infoframe\n");
2412		return -EINVAL;
2413	}
2414
2415	if (!intel_hdmi_compute_hdmi_infoframe(encoder, pipe_config, conn_state)) {
2416		drm_dbg_kms(display->drm, "bad HDMI infoframe\n");
2417		return -EINVAL;
2418	}
2419
2420	if (!intel_hdmi_compute_drm_infoframe(encoder, pipe_config, conn_state)) {
2421		drm_dbg_kms(display->drm, "bad DRM infoframe\n");
2422		return -EINVAL;
2423	}
2424
2425	return 0;
2426}
2427
2428void intel_hdmi_encoder_shutdown(struct intel_encoder *encoder)
2429{
2430	struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
2431
2432	/*
2433	 * Give a hand to buggy BIOSen which forget to turn
2434	 * the TMDS output buffers back on after a reboot.
2435	 */
2436	intel_dp_dual_mode_set_tmds_output(intel_hdmi, true);
2437}
2438
2439static void
2440intel_hdmi_unset_edid(struct drm_connector *connector)
2441{
2442	struct intel_hdmi *intel_hdmi = intel_attached_hdmi(to_intel_connector(connector));
2443
 
 
 
2444	intel_hdmi->dp_dual_mode.type = DRM_DP_DUAL_MODE_NONE;
2445	intel_hdmi->dp_dual_mode.max_tmds_clock = 0;
2446
2447	drm_edid_free(to_intel_connector(connector)->detect_edid);
2448	to_intel_connector(connector)->detect_edid = NULL;
2449}
2450
2451static void
2452intel_hdmi_dp_dual_mode_detect(struct drm_connector *connector)
2453{
2454	struct intel_display *display = to_intel_display(connector->dev);
2455	struct drm_i915_private *dev_priv = to_i915(connector->dev);
2456	struct intel_hdmi *hdmi = intel_attached_hdmi(to_intel_connector(connector));
2457	struct intel_encoder *encoder = &hdmi_to_dig_port(hdmi)->base;
2458	struct i2c_adapter *ddc = connector->ddc;
2459	enum drm_dp_dual_mode_type type;
2460
2461	type = drm_dp_dual_mode_detect(display->drm, ddc);
2462
2463	/*
2464	 * Type 1 DVI adaptors are not required to implement any
2465	 * registers, so we can't always detect their presence.
2466	 * Ideally we should be able to check the state of the
2467	 * CONFIG1 pin, but no such luck on our hardware.
2468	 *
2469	 * The only method left to us is to check the VBT to see
2470	 * if the port is a dual mode capable DP port.
 
 
 
2471	 */
2472	if (type == DRM_DP_DUAL_MODE_UNKNOWN) {
2473		if (!connector->force &&
2474		    intel_bios_encoder_supports_dp_dual_mode(encoder->devdata)) {
2475			drm_dbg_kms(display->drm,
 
 
 
2476				    "Assuming DP dual mode adaptor presence based on VBT\n");
2477			type = DRM_DP_DUAL_MODE_TYPE1_DVI;
2478		} else {
2479			type = DRM_DP_DUAL_MODE_NONE;
2480		}
2481	}
2482
2483	if (type == DRM_DP_DUAL_MODE_NONE)
2484		return;
2485
2486	hdmi->dp_dual_mode.type = type;
2487	hdmi->dp_dual_mode.max_tmds_clock =
2488		drm_dp_dual_mode_max_tmds_clock(display->drm, type, ddc);
2489
2490	drm_dbg_kms(display->drm,
2491		    "DP dual mode adaptor (%s) detected (max TMDS clock: %d kHz)\n",
2492		    drm_dp_get_dual_mode_type_name(type),
2493		    hdmi->dp_dual_mode.max_tmds_clock);
2494
2495	/* Older VBTs are often buggy and can't be trusted :( Play it safe. */
2496	if ((DISPLAY_VER(display) >= 8 || IS_HASWELL(dev_priv)) &&
2497	    !intel_bios_encoder_supports_dp_dual_mode(encoder->devdata)) {
2498		drm_dbg_kms(display->drm,
2499			    "Ignoring DP dual mode adaptor max TMDS clock for native HDMI port\n");
2500		hdmi->dp_dual_mode.max_tmds_clock = 0;
2501	}
2502}
2503
2504static bool
2505intel_hdmi_set_edid(struct drm_connector *connector)
2506{
2507	struct intel_display *display = to_intel_display(connector->dev);
2508	struct drm_i915_private *dev_priv = to_i915(connector->dev);
2509	struct intel_hdmi *intel_hdmi = intel_attached_hdmi(to_intel_connector(connector));
2510	struct i2c_adapter *ddc = connector->ddc;
2511	intel_wakeref_t wakeref;
2512	const struct drm_edid *drm_edid;
2513	bool connected = false;
 
2514
2515	wakeref = intel_display_power_get(dev_priv, POWER_DOMAIN_GMBUS);
2516
2517	drm_edid = drm_edid_read_ddc(connector, ddc);
 
 
2518
2519	if (!drm_edid && !intel_gmbus_is_forced_bit(ddc)) {
2520		drm_dbg_kms(display->drm,
2521			    "HDMI GMBUS EDID read failed, retry using GPIO bit-banging\n");
2522		intel_gmbus_force_bit(ddc, true);
2523		drm_edid = drm_edid_read_ddc(connector, ddc);
2524		intel_gmbus_force_bit(ddc, false);
2525	}
2526
2527	/* Below we depend on display info having been updated */
2528	drm_edid_connector_update(connector, drm_edid);
2529
2530	to_intel_connector(connector)->detect_edid = drm_edid;
2531
2532	if (drm_edid_is_digital(drm_edid)) {
2533		intel_hdmi_dp_dual_mode_detect(connector);
 
 
2534
2535		connected = true;
2536	}
2537
2538	intel_display_power_put(dev_priv, POWER_DOMAIN_GMBUS, wakeref);
2539
2540	cec_notifier_set_phys_addr(intel_hdmi->cec_notifier,
2541				   connector->display_info.source_physical_address);
2542
2543	return connected;
2544}
2545
2546static enum drm_connector_status
2547intel_hdmi_detect(struct drm_connector *connector, bool force)
2548{
2549	struct intel_display *display = to_intel_display(connector->dev);
2550	enum drm_connector_status status = connector_status_disconnected;
2551	struct drm_i915_private *dev_priv = to_i915(connector->dev);
2552	struct intel_hdmi *intel_hdmi = intel_attached_hdmi(to_intel_connector(connector));
2553	struct intel_encoder *encoder = &hdmi_to_dig_port(intel_hdmi)->base;
2554	intel_wakeref_t wakeref;
2555
2556	drm_dbg_kms(display->drm, "[CONNECTOR:%d:%s]\n",
2557		    connector->base.id, connector->name);
2558
2559	if (!intel_display_device_enabled(dev_priv))
2560		return connector_status_disconnected;
2561
2562	if (!intel_display_driver_check_access(dev_priv))
2563		return connector->status;
2564
2565	wakeref = intel_display_power_get(dev_priv, POWER_DOMAIN_GMBUS);
2566
2567	if (DISPLAY_VER(display) >= 11 &&
2568	    !intel_digital_port_connected(encoder))
2569		goto out;
2570
2571	intel_hdmi_unset_edid(connector);
2572
2573	if (intel_hdmi_set_edid(connector))
2574		status = connector_status_connected;
2575
2576out:
2577	intel_display_power_put(dev_priv, POWER_DOMAIN_GMBUS, wakeref);
2578
2579	if (status != connector_status_connected)
2580		cec_notifier_phys_addr_invalidate(intel_hdmi->cec_notifier);
2581
 
 
 
 
 
 
2582	return status;
2583}
2584
2585static void
2586intel_hdmi_force(struct drm_connector *connector)
2587{
2588	struct intel_display *display = to_intel_display(connector->dev);
2589	struct drm_i915_private *i915 = to_i915(connector->dev);
2590
2591	drm_dbg_kms(display->drm, "[CONNECTOR:%d:%s]\n",
2592		    connector->base.id, connector->name);
2593
2594	if (!intel_display_driver_check_access(i915))
2595		return;
2596
2597	intel_hdmi_unset_edid(connector);
2598
2599	if (connector->status != connector_status_connected)
2600		return;
2601
2602	intel_hdmi_set_edid(connector);
2603}
2604
2605static int intel_hdmi_get_modes(struct drm_connector *connector)
2606{
2607	/* drm_edid_connector_update() done in ->detect() or ->force() */
2608	return drm_edid_connector_add_modes(connector);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2609}
2610
2611static int
2612intel_hdmi_connector_register(struct drm_connector *connector)
2613{
2614	int ret;
2615
2616	ret = intel_connector_register(connector);
2617	if (ret)
2618		return ret;
2619
 
 
2620	return ret;
2621}
2622
2623static void intel_hdmi_connector_unregister(struct drm_connector *connector)
2624{
2625	struct cec_notifier *n = intel_attached_hdmi(to_intel_connector(connector))->cec_notifier;
2626
2627	cec_notifier_conn_unregister(n);
2628
 
2629	intel_connector_unregister(connector);
2630}
2631
2632static const struct drm_connector_funcs intel_hdmi_connector_funcs = {
2633	.detect = intel_hdmi_detect,
2634	.force = intel_hdmi_force,
2635	.fill_modes = drm_helper_probe_single_connector_modes,
2636	.atomic_get_property = intel_digital_connector_atomic_get_property,
2637	.atomic_set_property = intel_digital_connector_atomic_set_property,
2638	.late_register = intel_hdmi_connector_register,
2639	.early_unregister = intel_hdmi_connector_unregister,
2640	.destroy = intel_connector_destroy,
2641	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
2642	.atomic_duplicate_state = intel_digital_connector_duplicate_state,
2643};
2644
2645static int intel_hdmi_connector_atomic_check(struct drm_connector *connector,
2646					     struct drm_atomic_state *state)
2647{
2648	struct intel_display *display = to_intel_display(connector->dev);
2649
2650	if (HAS_DDI(display))
2651		return intel_digital_connector_atomic_check(connector, state);
2652	else
2653		return g4x_hdmi_connector_atomic_check(connector, state);
2654}
2655
2656static const struct drm_connector_helper_funcs intel_hdmi_connector_helper_funcs = {
2657	.get_modes = intel_hdmi_get_modes,
2658	.mode_valid = intel_hdmi_mode_valid,
2659	.atomic_check = intel_hdmi_connector_atomic_check,
 
 
 
 
2660};
2661
2662static void
2663intel_hdmi_add_properties(struct intel_hdmi *intel_hdmi, struct drm_connector *connector)
2664{
2665	struct intel_display *display = to_intel_display(intel_hdmi);
 
 
2666
2667	intel_attach_force_audio_property(connector);
2668	intel_attach_broadcast_rgb_property(connector);
2669	intel_attach_aspect_ratio_property(connector);
2670
2671	intel_attach_hdmi_colorspace_property(connector);
 
 
 
 
 
 
 
2672	drm_connector_attach_content_type_property(connector);
2673
2674	if (DISPLAY_VER(display) >= 10)
2675		drm_connector_attach_hdr_output_metadata_property(connector);
 
2676
2677	if (!HAS_GMCH(display))
2678		drm_connector_attach_max_bpc_property(connector, 8, 12);
2679}
2680
2681/*
2682 * intel_hdmi_handle_sink_scrambling: handle sink scrambling/clock ratio setup
2683 * @encoder: intel_encoder
2684 * @connector: drm_connector
2685 * @high_tmds_clock_ratio = bool to indicate if the function needs to set
2686 *  or reset the high tmds clock ratio for scrambling
2687 * @scrambling: bool to Indicate if the function needs to set or reset
2688 *  sink scrambling
2689 *
2690 * This function handles scrambling on HDMI 2.0 capable sinks.
2691 * If required clock rate is > 340 Mhz && scrambling is supported by sink
2692 * it enables scrambling. This should be called before enabling the HDMI
2693 * 2.0 port, as the sink can choose to disable the scrambling if it doesn't
2694 * detect a scrambled clock within 100 ms.
2695 *
2696 * Returns:
2697 * True on success, false on failure.
2698 */
2699bool intel_hdmi_handle_sink_scrambling(struct intel_encoder *encoder,
2700				       struct drm_connector *connector,
2701				       bool high_tmds_clock_ratio,
2702				       bool scrambling)
2703{
2704	struct intel_display *display = to_intel_display(encoder);
 
2705	struct drm_scrambling *sink_scrambling =
2706		&connector->display_info.hdmi.scdc.scrambling;
 
 
2707
2708	if (!sink_scrambling->supported)
2709		return true;
2710
2711	drm_dbg_kms(display->drm,
2712		    "[CONNECTOR:%d:%s] scrambling=%s, TMDS bit clock ratio=1/%d\n",
2713		    connector->base.id, connector->name,
2714		    str_yes_no(scrambling), high_tmds_clock_ratio ? 40 : 10);
2715
2716	/* Set TMDS bit clock ratio to 1/40 or 1/10, and enable/disable scrambling */
2717	return drm_scdc_set_high_tmds_clock_ratio(connector, high_tmds_clock_ratio) &&
2718		drm_scdc_set_scrambling(connector, scrambling);
 
2719}
2720
2721static u8 chv_encoder_to_ddc_pin(struct intel_encoder *encoder)
2722{
2723	enum port port = encoder->port;
2724	u8 ddc_pin;
2725
2726	switch (port) {
2727	case PORT_B:
2728		ddc_pin = GMBUS_PIN_DPB;
2729		break;
2730	case PORT_C:
2731		ddc_pin = GMBUS_PIN_DPC;
2732		break;
2733	case PORT_D:
2734		ddc_pin = GMBUS_PIN_DPD_CHV;
2735		break;
2736	default:
2737		MISSING_CASE(port);
2738		ddc_pin = GMBUS_PIN_DPB;
2739		break;
2740	}
2741	return ddc_pin;
2742}
2743
2744static u8 bxt_encoder_to_ddc_pin(struct intel_encoder *encoder)
2745{
2746	enum port port = encoder->port;
2747	u8 ddc_pin;
2748
2749	switch (port) {
2750	case PORT_B:
2751		ddc_pin = GMBUS_PIN_1_BXT;
2752		break;
2753	case PORT_C:
2754		ddc_pin = GMBUS_PIN_2_BXT;
2755		break;
2756	default:
2757		MISSING_CASE(port);
2758		ddc_pin = GMBUS_PIN_1_BXT;
2759		break;
2760	}
2761	return ddc_pin;
2762}
2763
2764static u8 cnp_encoder_to_ddc_pin(struct intel_encoder *encoder)
 
2765{
2766	enum port port = encoder->port;
2767	u8 ddc_pin;
2768
2769	switch (port) {
2770	case PORT_B:
2771		ddc_pin = GMBUS_PIN_1_BXT;
2772		break;
2773	case PORT_C:
2774		ddc_pin = GMBUS_PIN_2_BXT;
2775		break;
2776	case PORT_D:
2777		ddc_pin = GMBUS_PIN_4_CNP;
2778		break;
2779	case PORT_F:
2780		ddc_pin = GMBUS_PIN_3_BXT;
2781		break;
2782	default:
2783		MISSING_CASE(port);
2784		ddc_pin = GMBUS_PIN_1_BXT;
2785		break;
2786	}
2787	return ddc_pin;
2788}
2789
2790static u8 icl_encoder_to_ddc_pin(struct intel_encoder *encoder)
2791{
2792	struct intel_display *display = to_intel_display(encoder);
2793	enum port port = encoder->port;
2794
2795	if (intel_encoder_is_combo(encoder))
2796		return GMBUS_PIN_1_BXT + port;
2797	else if (intel_encoder_is_tc(encoder))
2798		return GMBUS_PIN_9_TC1_ICP + intel_encoder_to_tc(encoder);
2799
2800	drm_WARN(display->drm, 1, "Unknown port:%c\n", port_name(port));
2801	return GMBUS_PIN_2_BXT;
2802}
2803
2804static u8 mcc_encoder_to_ddc_pin(struct intel_encoder *encoder)
2805{
2806	enum phy phy = intel_encoder_to_phy(encoder);
2807	u8 ddc_pin;
2808
2809	switch (phy) {
2810	case PHY_A:
2811		ddc_pin = GMBUS_PIN_1_BXT;
2812		break;
2813	case PHY_B:
2814		ddc_pin = GMBUS_PIN_2_BXT;
2815		break;
2816	case PHY_C:
2817		ddc_pin = GMBUS_PIN_9_TC1_ICP;
2818		break;
2819	default:
2820		MISSING_CASE(phy);
2821		ddc_pin = GMBUS_PIN_1_BXT;
2822		break;
2823	}
2824	return ddc_pin;
2825}
2826
2827static u8 rkl_encoder_to_ddc_pin(struct intel_encoder *encoder)
2828{
2829	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
2830	enum phy phy = intel_encoder_to_phy(encoder);
2831
2832	WARN_ON(encoder->port == PORT_C);
2833
2834	/*
2835	 * Pin mapping for RKL depends on which PCH is present.  With TGP, the
2836	 * final two outputs use type-c pins, even though they're actually
2837	 * combo outputs.  With CMP, the traditional DDI A-D pins are used for
2838	 * all outputs.
2839	 */
2840	if (INTEL_PCH_TYPE(dev_priv) >= PCH_TGP && phy >= PHY_C)
2841		return GMBUS_PIN_9_TC1_ICP + phy - PHY_C;
2842
2843	return GMBUS_PIN_1_BXT + phy;
2844}
2845
2846static u8 gen9bc_tgp_encoder_to_ddc_pin(struct intel_encoder *encoder)
 
2847{
2848	struct intel_display *display = to_intel_display(encoder);
2849	struct drm_i915_private *i915 = to_i915(encoder->base.dev);
2850	enum phy phy = intel_encoder_to_phy(encoder);
2851
2852	drm_WARN_ON(display->drm, encoder->port == PORT_A);
2853
2854	/*
2855	 * Pin mapping for GEN9 BC depends on which PCH is present.  With TGP,
2856	 * final two outputs use type-c pins, even though they're actually
2857	 * combo outputs.  With CMP, the traditional DDI A-D pins are used for
2858	 * all outputs.
2859	 */
2860	if (INTEL_PCH_TYPE(i915) >= PCH_TGP && phy >= PHY_C)
2861		return GMBUS_PIN_9_TC1_ICP + phy - PHY_C;
2862
2863	return GMBUS_PIN_1_BXT + phy;
2864}
2865
2866static u8 dg1_encoder_to_ddc_pin(struct intel_encoder *encoder)
2867{
2868	return intel_encoder_to_phy(encoder) + 1;
2869}
2870
2871static u8 adls_encoder_to_ddc_pin(struct intel_encoder *encoder)
2872{
2873	enum phy phy = intel_encoder_to_phy(encoder);
2874
2875	WARN_ON(encoder->port == PORT_B || encoder->port == PORT_C);
2876
2877	/*
2878	 * Pin mapping for ADL-S requires TC pins for all combo phy outputs
2879	 * except first combo output.
2880	 */
2881	if (phy == PHY_A)
2882		return GMBUS_PIN_1_BXT;
2883
2884	return GMBUS_PIN_9_TC1_ICP + phy - PHY_B;
2885}
2886
2887static u8 g4x_encoder_to_ddc_pin(struct intel_encoder *encoder)
2888{
2889	enum port port = encoder->port;
2890	u8 ddc_pin;
2891
2892	switch (port) {
2893	case PORT_B:
2894		ddc_pin = GMBUS_PIN_DPB;
2895		break;
2896	case PORT_C:
2897		ddc_pin = GMBUS_PIN_DPC;
2898		break;
2899	case PORT_D:
2900		ddc_pin = GMBUS_PIN_DPD;
2901		break;
2902	default:
2903		MISSING_CASE(port);
2904		ddc_pin = GMBUS_PIN_DPB;
2905		break;
2906	}
2907	return ddc_pin;
2908}
2909
2910static u8 intel_hdmi_default_ddc_pin(struct intel_encoder *encoder)
2911{
2912	struct intel_display *display = to_intel_display(encoder);
2913	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 
2914	u8 ddc_pin;
2915
2916	if (IS_ALDERLAKE_S(dev_priv))
2917		ddc_pin = adls_encoder_to_ddc_pin(encoder);
2918	else if (INTEL_PCH_TYPE(dev_priv) >= PCH_DG1)
2919		ddc_pin = dg1_encoder_to_ddc_pin(encoder);
2920	else if (IS_ROCKETLAKE(dev_priv))
2921		ddc_pin = rkl_encoder_to_ddc_pin(encoder);
2922	else if (DISPLAY_VER(display) == 9 && HAS_PCH_TGP(dev_priv))
2923		ddc_pin = gen9bc_tgp_encoder_to_ddc_pin(encoder);
2924	else if ((IS_JASPERLAKE(dev_priv) || IS_ELKHARTLAKE(dev_priv)) &&
2925		 HAS_PCH_TGP(dev_priv))
2926		ddc_pin = mcc_encoder_to_ddc_pin(encoder);
 
2927	else if (INTEL_PCH_TYPE(dev_priv) >= PCH_ICP)
2928		ddc_pin = icl_encoder_to_ddc_pin(encoder);
2929	else if (HAS_PCH_CNP(dev_priv))
2930		ddc_pin = cnp_encoder_to_ddc_pin(encoder);
2931	else if (IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv))
2932		ddc_pin = bxt_encoder_to_ddc_pin(encoder);
2933	else if (IS_CHERRYVIEW(dev_priv))
2934		ddc_pin = chv_encoder_to_ddc_pin(encoder);
2935	else
2936		ddc_pin = g4x_encoder_to_ddc_pin(encoder);
2937
2938	return ddc_pin;
2939}
2940
2941static struct intel_encoder *
2942get_encoder_by_ddc_pin(struct intel_encoder *encoder, u8 ddc_pin)
2943{
2944	struct intel_display *display = to_intel_display(encoder);
2945	struct intel_encoder *other;
2946
2947	for_each_intel_encoder(display->drm, other) {
2948		struct intel_connector *connector;
2949
2950		if (other == encoder)
2951			continue;
2952
2953		if (!intel_encoder_is_dig_port(other))
2954			continue;
2955
2956		connector = enc_to_dig_port(other)->hdmi.attached_connector;
2957
2958		if (connector && connector->base.ddc == intel_gmbus_get_adapter(display, ddc_pin))
2959			return other;
2960	}
2961
2962	return NULL;
2963}
2964
2965static u8 intel_hdmi_ddc_pin(struct intel_encoder *encoder)
2966{
2967	struct intel_display *display = to_intel_display(encoder);
2968	struct intel_encoder *other;
2969	const char *source;
2970	u8 ddc_pin;
2971
2972	ddc_pin = intel_bios_hdmi_ddc_pin(encoder->devdata);
2973	source = "VBT";
2974
2975	if (!ddc_pin) {
2976		ddc_pin = intel_hdmi_default_ddc_pin(encoder);
2977		source = "platform default";
2978	}
2979
2980	if (!intel_gmbus_is_valid_pin(display, ddc_pin)) {
2981		drm_dbg_kms(display->drm,
2982			    "[ENCODER:%d:%s] Invalid DDC pin %d\n",
2983			    encoder->base.base.id, encoder->base.name, ddc_pin);
2984		return 0;
2985	}
2986
2987	other = get_encoder_by_ddc_pin(encoder, ddc_pin);
2988	if (other) {
2989		drm_dbg_kms(display->drm,
2990			    "[ENCODER:%d:%s] DDC pin %d already claimed by [ENCODER:%d:%s]\n",
2991			    encoder->base.base.id, encoder->base.name, ddc_pin,
2992			    other->base.base.id, other->base.name);
2993		return 0;
2994	}
2995
2996	drm_dbg_kms(display->drm,
2997		    "[ENCODER:%d:%s] Using DDC pin 0x%x (%s)\n",
2998		    encoder->base.base.id, encoder->base.name,
2999		    ddc_pin, source);
3000
3001	return ddc_pin;
3002}
3003
3004void intel_infoframe_init(struct intel_digital_port *dig_port)
3005{
3006	struct intel_display *display = to_intel_display(dig_port);
3007	struct drm_i915_private *dev_priv =
3008		to_i915(dig_port->base.base.dev);
3009
3010	if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
3011		dig_port->write_infoframe = vlv_write_infoframe;
3012		dig_port->read_infoframe = vlv_read_infoframe;
3013		dig_port->set_infoframes = vlv_set_infoframes;
3014		dig_port->infoframes_enabled = vlv_infoframes_enabled;
3015	} else if (IS_G4X(dev_priv)) {
3016		dig_port->write_infoframe = g4x_write_infoframe;
3017		dig_port->read_infoframe = g4x_read_infoframe;
3018		dig_port->set_infoframes = g4x_set_infoframes;
3019		dig_port->infoframes_enabled = g4x_infoframes_enabled;
3020	} else if (HAS_DDI(display)) {
3021		if (intel_bios_encoder_is_lspcon(dig_port->base.devdata)) {
3022			dig_port->write_infoframe = lspcon_write_infoframe;
3023			dig_port->read_infoframe = lspcon_read_infoframe;
3024			dig_port->set_infoframes = lspcon_set_infoframes;
3025			dig_port->infoframes_enabled = lspcon_infoframes_enabled;
3026		} else {
3027			dig_port->write_infoframe = hsw_write_infoframe;
3028			dig_port->read_infoframe = hsw_read_infoframe;
3029			dig_port->set_infoframes = hsw_set_infoframes;
3030			dig_port->infoframes_enabled = hsw_infoframes_enabled;
3031		}
3032	} else if (HAS_PCH_IBX(dev_priv)) {
3033		dig_port->write_infoframe = ibx_write_infoframe;
3034		dig_port->read_infoframe = ibx_read_infoframe;
3035		dig_port->set_infoframes = ibx_set_infoframes;
3036		dig_port->infoframes_enabled = ibx_infoframes_enabled;
3037	} else {
3038		dig_port->write_infoframe = cpt_write_infoframe;
3039		dig_port->read_infoframe = cpt_read_infoframe;
3040		dig_port->set_infoframes = cpt_set_infoframes;
3041		dig_port->infoframes_enabled = cpt_infoframes_enabled;
3042	}
3043}
3044
3045void intel_hdmi_init_connector(struct intel_digital_port *dig_port,
3046			       struct intel_connector *intel_connector)
3047{
3048	struct intel_display *display = to_intel_display(dig_port);
3049	struct drm_connector *connector = &intel_connector->base;
3050	struct intel_hdmi *intel_hdmi = &dig_port->hdmi;
3051	struct intel_encoder *intel_encoder = &dig_port->base;
3052	struct drm_device *dev = intel_encoder->base.dev;
 
 
3053	enum port port = intel_encoder->port;
3054	struct cec_connector_info conn_info;
3055	u8 ddc_pin;
3056
3057	drm_dbg_kms(display->drm,
3058		    "Adding HDMI connector on [ENCODER:%d:%s]\n",
3059		    intel_encoder->base.base.id, intel_encoder->base.name);
3060
3061	if (DISPLAY_VER(display) < 12 && drm_WARN_ON(dev, port == PORT_A))
3062		return;
3063
3064	if (drm_WARN(dev, dig_port->max_lanes < 4,
3065		     "Not enough lanes (%d) for HDMI on [ENCODER:%d:%s]\n",
3066		     dig_port->max_lanes, intel_encoder->base.base.id,
3067		     intel_encoder->base.name))
3068		return;
3069
3070	ddc_pin = intel_hdmi_ddc_pin(intel_encoder);
3071	if (!ddc_pin)
3072		return;
3073
3074	drm_connector_init_with_ddc(dev, connector,
3075				    &intel_hdmi_connector_funcs,
3076				    DRM_MODE_CONNECTOR_HDMIA,
3077				    intel_gmbus_get_adapter(display, ddc_pin));
3078
3079	drm_connector_helper_add(connector, &intel_hdmi_connector_helper_funcs);
3080
3081	if (DISPLAY_VER(display) < 12)
3082		connector->interlace_allowed = true;
3083
3084	connector->stereo_allowed = true;
3085
3086	if (DISPLAY_VER(display) >= 10)
3087		connector->ycbcr_420_allowed = true;
3088
 
3089	intel_connector->polled = DRM_CONNECTOR_POLL_HPD;
3090	intel_connector->base.polled = intel_connector->polled;
3091
3092	if (HAS_DDI(display))
3093		intel_connector->get_hw_state = intel_ddi_connector_get_hw_state;
3094	else
3095		intel_connector->get_hw_state = intel_connector_get_hw_state;
3096
3097	intel_hdmi_add_properties(intel_hdmi, connector);
3098
3099	intel_connector_attach_encoder(intel_connector, intel_encoder);
3100	intel_hdmi->attached_connector = intel_connector;
3101
3102	if (is_hdcp_supported(display, port)) {
3103		int ret = intel_hdcp_init(intel_connector, dig_port,
3104					  &intel_hdmi_hdcp_shim);
3105		if (ret)
3106			drm_dbg_kms(display->drm,
3107				    "HDCP init failed, skipping.\n");
3108	}
3109
 
 
 
 
 
 
 
 
 
 
3110	cec_fill_conn_info_from_drm(&conn_info, connector);
3111
3112	intel_hdmi->cec_notifier =
3113		cec_notifier_conn_register(dev->dev, port_identifier(port),
3114					   &conn_info);
3115	if (!intel_hdmi->cec_notifier)
3116		drm_dbg_kms(display->drm, "CEC notifier get failed\n");
3117}
3118
3119/*
3120 * intel_hdmi_dsc_get_slice_height - get the dsc slice_height
3121 * @vactive: Vactive of a display mode
3122 *
3123 * @return: appropriate dsc slice height for a given mode.
3124 */
3125int intel_hdmi_dsc_get_slice_height(int vactive)
3126{
3127	int slice_height;
 
 
3128
3129	/*
3130	 * Slice Height determination : HDMI2.1 Section 7.7.5.2
3131	 * Select smallest slice height >=96, that results in a valid PPS and
3132	 * requires minimum padding lines required for final slice.
3133	 *
3134	 * Assumption : Vactive is even.
 
 
 
 
 
3135	 */
3136	for (slice_height = 96; slice_height <= vactive; slice_height += 2)
3137		if (vactive % slice_height == 0)
3138			return slice_height;
3139
3140	return 0;
3141}
3142
3143/*
3144 * intel_hdmi_dsc_get_num_slices - get no. of dsc slices based on dsc encoder
3145 * and dsc decoder capabilities
3146 *
3147 * @crtc_state: intel crtc_state
3148 * @src_max_slices: maximum slices supported by the DSC encoder
3149 * @src_max_slice_width: maximum slice width supported by DSC encoder
3150 * @hdmi_max_slices: maximum slices supported by sink DSC decoder
3151 * @hdmi_throughput: maximum clock per slice (MHz) supported by HDMI sink
3152 *
3153 * @return: num of dsc slices that can be supported by the dsc encoder
3154 * and decoder.
3155 */
3156int
3157intel_hdmi_dsc_get_num_slices(const struct intel_crtc_state *crtc_state,
3158			      int src_max_slices, int src_max_slice_width,
3159			      int hdmi_max_slices, int hdmi_throughput)
3160{
3161/* Pixel rates in KPixels/sec */
3162#define HDMI_DSC_PEAK_PIXEL_RATE		2720000
3163/*
3164 * Rates at which the source and sink are required to process pixels in each
3165 * slice, can be two levels: either atleast 340000KHz or atleast 40000KHz.
3166 */
3167#define HDMI_DSC_MAX_ENC_THROUGHPUT_0		340000
3168#define HDMI_DSC_MAX_ENC_THROUGHPUT_1		400000
3169
3170/* Spec limits the slice width to 2720 pixels */
3171#define MAX_HDMI_SLICE_WIDTH			2720
3172	int kslice_adjust;
3173	int adjusted_clk_khz;
3174	int min_slices;
3175	int target_slices;
3176	int max_throughput; /* max clock freq. in khz per slice */
3177	int max_slice_width;
3178	int slice_width;
3179	int pixel_clock = crtc_state->hw.adjusted_mode.crtc_clock;
3180
3181	if (!hdmi_throughput)
3182		return 0;
3183
3184	/*
3185	 * Slice Width determination : HDMI2.1 Section 7.7.5.1
3186	 * kslice_adjust factor for 4:2:0, and 4:2:2 formats is 0.5, where as
3187	 * for 4:4:4 is 1.0. Multiplying these factors by 10 and later
3188	 * dividing adjusted clock value by 10.
3189	 */
3190	if (crtc_state->output_format == INTEL_OUTPUT_FORMAT_YCBCR444 ||
3191	    crtc_state->output_format == INTEL_OUTPUT_FORMAT_RGB)
3192		kslice_adjust = 10;
3193	else
3194		kslice_adjust = 5;
3195
3196	/*
3197	 * As per spec, the rate at which the source and the sink process
3198	 * the pixels per slice are at two levels: atleast 340Mhz or 400Mhz.
3199	 * This depends upon the pixel clock rate and output formats
3200	 * (kslice adjust).
3201	 * If pixel clock * kslice adjust >= 2720MHz slices can be processed
3202	 * at max 340MHz, otherwise they can be processed at max 400MHz.
3203	 */
3204
3205	adjusted_clk_khz = DIV_ROUND_UP(kslice_adjust * pixel_clock, 10);
3206
3207	if (adjusted_clk_khz <= HDMI_DSC_PEAK_PIXEL_RATE)
3208		max_throughput = HDMI_DSC_MAX_ENC_THROUGHPUT_0;
3209	else
3210		max_throughput = HDMI_DSC_MAX_ENC_THROUGHPUT_1;
3211
3212	/*
3213	 * Taking into account the sink's capability for maximum
3214	 * clock per slice (in MHz) as read from HF-VSDB.
3215	 */
3216	max_throughput = min(max_throughput, hdmi_throughput * 1000);
3217
3218	min_slices = DIV_ROUND_UP(adjusted_clk_khz, max_throughput);
3219	max_slice_width = min(MAX_HDMI_SLICE_WIDTH, src_max_slice_width);
3220
3221	/*
3222	 * Keep on increasing the num of slices/line, starting from min_slices
3223	 * per line till we get such a number, for which the slice_width is
3224	 * just less than max_slice_width. The slices/line selected should be
3225	 * less than or equal to the max horizontal slices that the combination
3226	 * of PCON encoder and HDMI decoder can support.
3227	 */
3228	slice_width = max_slice_width;
3229
3230	do {
3231		if (min_slices <= 1 && src_max_slices >= 1 && hdmi_max_slices >= 1)
3232			target_slices = 1;
3233		else if (min_slices <= 2 && src_max_slices >= 2 && hdmi_max_slices >= 2)
3234			target_slices = 2;
3235		else if (min_slices <= 4 && src_max_slices >= 4 && hdmi_max_slices >= 4)
3236			target_slices = 4;
3237		else if (min_slices <= 8 && src_max_slices >= 8 && hdmi_max_slices >= 8)
3238			target_slices = 8;
3239		else if (min_slices <= 12 && src_max_slices >= 12 && hdmi_max_slices >= 12)
3240			target_slices = 12;
3241		else if (min_slices <= 16 && src_max_slices >= 16 && hdmi_max_slices >= 16)
3242			target_slices = 16;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
3243		else
3244			return 0;
3245
3246		slice_width = DIV_ROUND_UP(crtc_state->hw.adjusted_mode.hdisplay, target_slices);
3247		if (slice_width >= max_slice_width)
3248			min_slices = target_slices + 1;
3249	} while (slice_width >= max_slice_width);
3250
3251	return target_slices;
3252}
3253
3254/*
3255 * intel_hdmi_dsc_get_bpp - get the appropriate compressed bits_per_pixel based on
3256 * source and sink capabilities.
3257 *
3258 * @src_fraction_bpp: fractional bpp supported by the source
3259 * @slice_width: dsc slice width supported by the source and sink
3260 * @num_slices: num of slices supported by the source and sink
3261 * @output_format: video output format
3262 * @hdmi_all_bpp: sink supports decoding of 1/16th bpp setting
3263 * @hdmi_max_chunk_bytes: max bytes in a line of chunks supported by sink
3264 *
3265 * @return: compressed bits_per_pixel in step of 1/16 of bits_per_pixel
3266 */
3267int
3268intel_hdmi_dsc_get_bpp(int src_fractional_bpp, int slice_width, int num_slices,
3269		       int output_format, bool hdmi_all_bpp,
3270		       int hdmi_max_chunk_bytes)
3271{
3272	int max_dsc_bpp, min_dsc_bpp;
3273	int target_bytes;
3274	bool bpp_found = false;
3275	int bpp_decrement_x16;
3276	int bpp_target;
3277	int bpp_target_x16;
3278
3279	/*
3280	 * Get min bpp and max bpp as per Table 7.23, in HDMI2.1 spec
3281	 * Start with the max bpp and keep on decrementing with
3282	 * fractional bpp, if supported by PCON DSC encoder
3283	 *
3284	 * for each bpp we check if no of bytes can be supported by HDMI sink
3285	 */
3286
3287	/* Assuming: bpc as 8*/
3288	if (output_format == INTEL_OUTPUT_FORMAT_YCBCR420) {
3289		min_dsc_bpp = 6;
3290		max_dsc_bpp = 3 * 4; /* 3*bpc/2 */
3291	} else if (output_format == INTEL_OUTPUT_FORMAT_YCBCR444 ||
3292		   output_format == INTEL_OUTPUT_FORMAT_RGB) {
3293		min_dsc_bpp = 8;
3294		max_dsc_bpp = 3 * 8; /* 3*bpc */
3295	} else {
3296		/* Assuming 4:2:2 encoding */
3297		min_dsc_bpp = 7;
3298		max_dsc_bpp = 2 * 8; /* 2*bpc */
3299	}
3300
3301	/*
3302	 * Taking into account if all dsc_all_bpp supported by HDMI2.1 sink
3303	 * Section 7.7.34 : Source shall not enable compressed Video
3304	 * Transport with bpp_target settings above 12 bpp unless
3305	 * DSC_all_bpp is set to 1.
3306	 */
3307	if (!hdmi_all_bpp)
3308		max_dsc_bpp = min(max_dsc_bpp, 12);
3309
3310	/*
3311	 * The Sink has a limit of compressed data in bytes for a scanline,
3312	 * as described in max_chunk_bytes field in HFVSDB block of edid.
3313	 * The no. of bytes depend on the target bits per pixel that the
3314	 * source configures. So we start with the max_bpp and calculate
3315	 * the target_chunk_bytes. We keep on decrementing the target_bpp,
3316	 * till we get the target_chunk_bytes just less than what the sink's
3317	 * max_chunk_bytes, or else till we reach the min_dsc_bpp.
3318	 *
3319	 * The decrement is according to the fractional support from PCON DSC
3320	 * encoder. For fractional BPP we use bpp_target as a multiple of 16.
3321	 *
3322	 * bpp_target_x16 = bpp_target * 16
3323	 * So we need to decrement by {1, 2, 4, 8, 16} for fractional bpps
3324	 * {1/16, 1/8, 1/4, 1/2, 1} respectively.
3325	 */
 
 
3326
3327	bpp_target = max_dsc_bpp;
 
 
3328
3329	/* src does not support fractional bpp implies decrement by 16 for bppx16 */
3330	if (!src_fractional_bpp)
3331		src_fractional_bpp = 1;
3332	bpp_decrement_x16 = DIV_ROUND_UP(16, src_fractional_bpp);
3333	bpp_target_x16 = (bpp_target * 16) - bpp_decrement_x16;
3334
3335	while (bpp_target_x16 > (min_dsc_bpp * 16)) {
3336		int bpp;
3337
3338		bpp = DIV_ROUND_UP(bpp_target_x16, 16);
3339		target_bytes = DIV_ROUND_UP((num_slices * slice_width * bpp), 8);
3340		if (target_bytes <= hdmi_max_chunk_bytes) {
3341			bpp_found = true;
3342			break;
3343		}
3344		bpp_target_x16 -= bpp_decrement_x16;
3345	}
3346	if (bpp_found)
3347		return bpp_target_x16;
3348
3349	return 0;
 
3350}