drivers/gpu/drm/i915/display/intel_audio.c

   1 /*
   2  * Copyright © 2014 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  */
  23
  24 #include <linux/component.h>
  25 #include <linux/kernel.h>
  26
  27 #include <drm/drm_edid.h>
  28 #include <drm/drm_eld.h>
  29 #include <drm/drm_fixed.h>
  30 #include <drm/intel/i915_component.h>
  31
  32 #include "i915_drv.h"
  33 #include "intel_atomic.h"
  34 #include "intel_audio.h"
  35 #include "intel_audio_regs.h"
  36 #include "intel_cdclk.h"
  37 #include "intel_crtc.h"
  38 #include "intel_de.h"
  39 #include "intel_display_types.h"
  40 #include "intel_lpe_audio.h"
  41
  42 /**
  43  * DOC: High Definition Audio over HDMI and Display Port
  44  *
  45  * The graphics and audio drivers together support High Definition Audio over
  46  * HDMI and Display Port. The audio programming sequences are divided into audio
  47  * codec and controller enable and disable sequences. The graphics driver
  48  * handles the audio codec sequences, while the audio driver handles the audio
  49  * controller sequences.
  50  *
  51  * The disable sequences must be performed before disabling the transcoder or
  52  * port. The enable sequences may only be performed after enabling the
  53  * transcoder and port, and after completed link training. Therefore the audio
  54  * enable/disable sequences are part of the modeset sequence.
  55  *
  56  * The codec and controller sequences could be done either parallel or serial,
  57  * but generally the ELDV/PD change in the codec sequence indicates to the audio
  58  * driver that the controller sequence should start. Indeed, most of the
  59  * co-operation between the graphics and audio drivers is handled via audio
  60  * related registers. (The notable exception is the power management, not
  61  * covered here.)
  62  *
  63  * The struct &i915_audio_component is used to interact between the graphics
  64  * and audio drivers. The struct &i915_audio_component_ops @ops in it is
  65  * defined in graphics driver and called in audio driver. The
  66  * struct &i915_audio_component_audio_ops @audio_ops is called from i915 driver.
  67  */
  68
  69 struct intel_audio_funcs {
  70         void (*audio_codec_enable)(struct intel_encoder *encoder,
  71                                    const struct intel_crtc_state *crtc_state,
  72                                    const struct drm_connector_state *conn_state);
  73         void (*audio_codec_disable)(struct intel_encoder *encoder,
  74                                     const struct intel_crtc_state *old_crtc_state,
  75                                     const struct drm_connector_state *old_conn_state);
  76         void (*audio_codec_get_config)(struct intel_encoder *encoder,
  77                                        struct intel_crtc_state *crtc_state);
  78 };
  79
  80 struct hdmi_aud_ncts {
  81         int sample_rate;
  82         int clock;
  83         int n;
  84         int cts;
  85 };
  86
  87 static const struct {
  88         int clock;
  89         u32 config;
  90 } hdmi_audio_clock[] = {
  91         { 25175, AUD_CONFIG_PIXEL_CLOCK_HDMI_25175 },
  92         { 25200, AUD_CONFIG_PIXEL_CLOCK_HDMI_25200 }, /* default per bspec */
  93         { 27000, AUD_CONFIG_PIXEL_CLOCK_HDMI_27000 },
  94         { 27027, AUD_CONFIG_PIXEL_CLOCK_HDMI_27027 },
  95         { 54000, AUD_CONFIG_PIXEL_CLOCK_HDMI_54000 },
  96         { 54054, AUD_CONFIG_PIXEL_CLOCK_HDMI_54054 },
  97         { 74176, AUD_CONFIG_PIXEL_CLOCK_HDMI_74176 },
  98         { 74250, AUD_CONFIG_PIXEL_CLOCK_HDMI_74250 },
  99         { 148352, AUD_CONFIG_PIXEL_CLOCK_HDMI_148352 },
 100         { 148500, AUD_CONFIG_PIXEL_CLOCK_HDMI_148500 },
 101         { 296703, AUD_CONFIG_PIXEL_CLOCK_HDMI_296703 },
 102         { 297000, AUD_CONFIG_PIXEL_CLOCK_HDMI_297000 },
 103         { 593407, AUD_CONFIG_PIXEL_CLOCK_HDMI_593407 },
 104         { 594000, AUD_CONFIG_PIXEL_CLOCK_HDMI_594000 },
 105 };
 106
 107 /* HDMI N/CTS table */
 108 #define TMDS_297M 297000
 109 #define TMDS_296M 296703
 110 #define TMDS_594M 594000
 111 #define TMDS_593M 593407
 112
 113 static const struct hdmi_aud_ncts hdmi_aud_ncts_24bpp[] = {
 114         { 32000, TMDS_296M, 5824, 421875 },
 115         { 32000, TMDS_297M, 3072, 222750 },
 116         { 32000, TMDS_593M, 5824, 843750 },
 117         { 32000, TMDS_594M, 3072, 445500 },
 118         { 44100, TMDS_296M, 4459, 234375 },
 119         { 44100, TMDS_297M, 4704, 247500 },
 120         { 44100, TMDS_593M, 8918, 937500 },
 121         { 44100, TMDS_594M, 9408, 990000 },
 122         { 88200, TMDS_296M, 8918, 234375 },
 123         { 88200, TMDS_297M, 9408, 247500 },
 124         { 88200, TMDS_593M, 17836, 937500 },
 125         { 88200, TMDS_594M, 18816, 990000 },
 126         { 176400, TMDS_296M, 17836, 234375 },
 127         { 176400, TMDS_297M, 18816, 247500 },
 128         { 176400, TMDS_593M, 35672, 937500 },
 129         { 176400, TMDS_594M, 37632, 990000 },
 130         { 48000, TMDS_296M, 5824, 281250 },
 131         { 48000, TMDS_297M, 5120, 247500 },
 132         { 48000, TMDS_593M, 5824, 562500 },
 133         { 48000, TMDS_594M, 6144, 594000 },
 134         { 96000, TMDS_296M, 11648, 281250 },
 135         { 96000, TMDS_297M, 10240, 247500 },
 136         { 96000, TMDS_593M, 11648, 562500 },
 137         { 96000, TMDS_594M, 12288, 594000 },
 138         { 192000, TMDS_296M, 23296, 281250 },
 139         { 192000, TMDS_297M, 20480, 247500 },
 140         { 192000, TMDS_593M, 23296, 562500 },
 141         { 192000, TMDS_594M, 24576, 594000 },
 142 };
 143
 144 /* Appendix C - N & CTS values for deep color from HDMI 2.0 spec*/
 145 /* HDMI N/CTS table for 10 bit deep color(30 bpp)*/
 146 #define TMDS_371M 371250
 147 #define TMDS_370M 370878
 148
 149 static const struct hdmi_aud_ncts hdmi_aud_ncts_30bpp[] = {
 150         { 32000, TMDS_370M, 5824, 527344 },
 151         { 32000, TMDS_371M, 6144, 556875 },
 152         { 44100, TMDS_370M, 8918, 585938 },
 153         { 44100, TMDS_371M, 4704, 309375 },
 154         { 88200, TMDS_370M, 17836, 585938 },
 155         { 88200, TMDS_371M, 9408, 309375 },
 156         { 176400, TMDS_370M, 35672, 585938 },
 157         { 176400, TMDS_371M, 18816, 309375 },
 158         { 48000, TMDS_370M, 11648, 703125 },
 159         { 48000, TMDS_371M, 5120, 309375 },
 160         { 96000, TMDS_370M, 23296, 703125 },
 161         { 96000, TMDS_371M, 10240, 309375 },
 162         { 192000, TMDS_370M, 46592, 703125 },
 163         { 192000, TMDS_371M, 20480, 309375 },
 164 };
 165
 166 /* HDMI N/CTS table for 12 bit deep color(36 bpp)*/
 167 #define TMDS_445_5M 445500
 168 #define TMDS_445M 445054
 169
 170 static const struct hdmi_aud_ncts hdmi_aud_ncts_36bpp[] = {
 171         { 32000, TMDS_445M, 5824, 632813 },
 172         { 32000, TMDS_445_5M, 4096, 445500 },
 173         { 44100, TMDS_445M, 8918, 703125 },
 174         { 44100, TMDS_445_5M, 4704, 371250 },
 175         { 88200, TMDS_445M, 17836, 703125 },
 176         { 88200, TMDS_445_5M, 9408, 371250 },
 177         { 176400, TMDS_445M, 35672, 703125 },
 178         { 176400, TMDS_445_5M, 18816, 371250 },
 179         { 48000, TMDS_445M, 5824, 421875 },
 180         { 48000, TMDS_445_5M, 5120, 371250 },
 181         { 96000, TMDS_445M, 11648, 421875 },
 182         { 96000, TMDS_445_5M, 10240, 371250 },
 183         { 192000, TMDS_445M, 23296, 421875 },
 184         { 192000, TMDS_445_5M, 20480, 371250 },
 185 };
 186
 187 /*
 188  * WA_14020863754: Implement Audio Workaround
 189  * Corner case with Min Hblank Fix can cause audio hang
 190  */
 191 static bool needs_wa_14020863754(struct drm_i915_private *i915)
 192 {
 193         return (DISPLAY_VER(i915) == 20 || IS_BATTLEMAGE(i915));
 194 }
 195
 196 /* get AUD_CONFIG_PIXEL_CLOCK_HDMI_* value for mode */
 197 static u32 audio_config_hdmi_pixel_clock(const struct intel_crtc_state *crtc_state)
 198 {
 199         struct drm_i915_private *i915 = to_i915(crtc_state->uapi.crtc->dev);
 200         const struct drm_display_mode *adjusted_mode =
 201                 &crtc_state->hw.adjusted_mode;
 202         int i;
 203
 204         for (i = 0; i < ARRAY_SIZE(hdmi_audio_clock); i++) {
 205                 if (adjusted_mode->crtc_clock == hdmi_audio_clock[i].clock)
 206                         break;
 207         }
 208
 209         if (DISPLAY_VER(i915) < 12 && adjusted_mode->crtc_clock > 148500)
 210                 i = ARRAY_SIZE(hdmi_audio_clock);
 211
 212         if (i == ARRAY_SIZE(hdmi_audio_clock)) {
 213                 drm_dbg_kms(&i915->drm,
 214                             "HDMI audio pixel clock setting for %d not found, falling back to defaults\n",
 215                             adjusted_mode->crtc_clock);
 216                 i = 1;
 217         }
 218
 219         drm_dbg_kms(&i915->drm,
 220                     "Configuring HDMI audio for pixel clock %d (0x%08x)\n",
 221                     hdmi_audio_clock[i].clock,
 222                     hdmi_audio_clock[i].config);
 223
 224         return hdmi_audio_clock[i].config;
 225 }
 226
 227 static int audio_config_hdmi_get_n(const struct intel_crtc_state *crtc_state,
 228                                    int rate)
 229 {
 230         const struct hdmi_aud_ncts *hdmi_ncts_table;
 231         int i, size;
 232
 233         if (crtc_state->pipe_bpp == 36) {
 234                 hdmi_ncts_table = hdmi_aud_ncts_36bpp;
 235                 size = ARRAY_SIZE(hdmi_aud_ncts_36bpp);
 236         } else if (crtc_state->pipe_bpp == 30) {
 237                 hdmi_ncts_table = hdmi_aud_ncts_30bpp;
 238                 size = ARRAY_SIZE(hdmi_aud_ncts_30bpp);
 239         } else {
 240                 hdmi_ncts_table = hdmi_aud_ncts_24bpp;
 241                 size = ARRAY_SIZE(hdmi_aud_ncts_24bpp);
 242         }
 243
 244         for (i = 0; i < size; i++) {
 245                 if (rate == hdmi_ncts_table[i].sample_rate &&
 246                     crtc_state->port_clock == hdmi_ncts_table[i].clock) {
 247                         return hdmi_ncts_table[i].n;
 248                 }
 249         }
 250         return 0;
 251 }
 252
 253 /* ELD buffer size in dwords */
 254 static int g4x_eld_buffer_size(struct drm_i915_private *i915)
 255 {
 256         u32 tmp;
 257
 258         tmp = intel_de_read(i915, G4X_AUD_CNTL_ST);
 259
 260         return REG_FIELD_GET(G4X_ELD_BUFFER_SIZE_MASK, tmp);
 261 }
 262
 263 static void g4x_audio_codec_get_config(struct intel_encoder *encoder,
 264                                        struct intel_crtc_state *crtc_state)
 265 {
 266         struct drm_i915_private *i915 = to_i915(encoder->base.dev);
 267         u32 *eld = (u32 *)crtc_state->eld;
 268         int eld_buffer_size, len, i;
 269         u32 tmp;
 270
 271         tmp = intel_de_read(i915, G4X_AUD_CNTL_ST);
 272         if ((tmp & G4X_ELD_VALID) == 0)
 273                 return;
 274
 275         intel_de_rmw(i915, G4X_AUD_CNTL_ST, G4X_ELD_ADDRESS_MASK, 0);
 276
 277         eld_buffer_size = g4x_eld_buffer_size(i915);
 278         len = min_t(int, sizeof(crtc_state->eld) / 4, eld_buffer_size);
 279
 280         for (i = 0; i < len; i++)
 281                 eld[i] = intel_de_read(i915, G4X_HDMIW_HDMIEDID);
 282 }
 283
 284 static void g4x_audio_codec_disable(struct intel_encoder *encoder,
 285                                     const struct intel_crtc_state *old_crtc_state,
 286                                     const struct drm_connector_state *old_conn_state)
 287 {
 288         struct drm_i915_private *i915 = to_i915(encoder->base.dev);
 289         struct intel_crtc *crtc = to_intel_crtc(old_crtc_state->uapi.crtc);
 290
 291         /* Invalidate ELD */
 292         intel_de_rmw(i915, G4X_AUD_CNTL_ST,
 293                      G4X_ELD_VALID, 0);
 294
 295         intel_crtc_wait_for_next_vblank(crtc);
 296         intel_crtc_wait_for_next_vblank(crtc);
 297 }
 298
 299 static void g4x_audio_codec_enable(struct intel_encoder *encoder,
 300                                    const struct intel_crtc_state *crtc_state,
 301                                    const struct drm_connector_state *conn_state)
 302 {
 303         struct drm_i915_private *i915 = to_i915(encoder->base.dev);
 304         struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
 305         const u32 *eld = (const u32 *)crtc_state->eld;
 306         int eld_buffer_size, len, i;
 307
 308         intel_crtc_wait_for_next_vblank(crtc);
 309
 310         intel_de_rmw(i915, G4X_AUD_CNTL_ST,
 311                      G4X_ELD_VALID | G4X_ELD_ADDRESS_MASK, 0);
 312
 313         eld_buffer_size = g4x_eld_buffer_size(i915);
 314         len = min(drm_eld_size(crtc_state->eld) / 4, eld_buffer_size);
 315
 316         for (i = 0; i < len; i++)
 317                 intel_de_write(i915, G4X_HDMIW_HDMIEDID, eld[i]);
 318         for (; i < eld_buffer_size; i++)
 319                 intel_de_write(i915, G4X_HDMIW_HDMIEDID, 0);
 320
 321         drm_WARN_ON(&i915->drm,
 322                     (intel_de_read(i915, G4X_AUD_CNTL_ST) & G4X_ELD_ADDRESS_MASK) != 0);
 323
 324         intel_de_rmw(i915, G4X_AUD_CNTL_ST,
 325                      0, G4X_ELD_VALID);
 326 }
 327
 328 static void
 329 hsw_dp_audio_config_update(struct intel_encoder *encoder,
 330                            const struct intel_crtc_state *crtc_state)
 331 {
 332         struct drm_i915_private *i915 = to_i915(encoder->base.dev);
 333         enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
 334
 335         /* Enable time stamps. Let HW calculate Maud/Naud values */
 336         intel_de_rmw(i915, HSW_AUD_CFG(cpu_transcoder),
 337                      AUD_CONFIG_N_VALUE_INDEX |
 338                      AUD_CONFIG_PIXEL_CLOCK_HDMI_MASK |
 339                      AUD_CONFIG_UPPER_N_MASK |
 340                      AUD_CONFIG_LOWER_N_MASK |
 341                      AUD_CONFIG_N_PROG_ENABLE,
 342                      AUD_CONFIG_N_VALUE_INDEX);
 343
 344 }
 345
 346 static void
 347 hsw_hdmi_audio_config_update(struct intel_encoder *encoder,
 348                              const struct intel_crtc_state *crtc_state)
 349 {
 350         struct drm_i915_private *i915 = to_i915(encoder->base.dev);
 351         struct i915_audio_component *acomp = i915->display.audio.component;
 352         enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
 353         enum port port = encoder->port;
 354         int n, rate;
 355         u32 tmp;
 356
 357         rate = acomp ? acomp->aud_sample_rate[port] : 0;
 358
 359         tmp = intel_de_read(i915, HSW_AUD_CFG(cpu_transcoder));
 360         tmp &= ~AUD_CONFIG_N_VALUE_INDEX;
 361         tmp &= ~AUD_CONFIG_PIXEL_CLOCK_HDMI_MASK;
 362         tmp &= ~AUD_CONFIG_N_PROG_ENABLE;
 363         tmp |= audio_config_hdmi_pixel_clock(crtc_state);
 364
 365         n = audio_config_hdmi_get_n(crtc_state, rate);
 366         if (n != 0) {
 367                 drm_dbg_kms(&i915->drm, "using N %d\n", n);
 368
 369                 tmp &= ~AUD_CONFIG_N_MASK;
 370                 tmp |= AUD_CONFIG_N(n);
 371                 tmp |= AUD_CONFIG_N_PROG_ENABLE;
 372         } else {
 373                 drm_dbg_kms(&i915->drm, "using automatic N\n");
 374         }
 375
 376         intel_de_write(i915, HSW_AUD_CFG(cpu_transcoder), tmp);
 377
 378         /*
 379          * Let's disable "Enable CTS or M Prog bit"
 380          * and let HW calculate the value
 381          */
 382         tmp = intel_de_read(i915, HSW_AUD_M_CTS_ENABLE(cpu_transcoder));
 383         tmp &= ~AUD_M_CTS_M_PROG_ENABLE;
 384         tmp &= ~AUD_M_CTS_M_VALUE_INDEX;
 385         intel_de_write(i915, HSW_AUD_M_CTS_ENABLE(cpu_transcoder), tmp);
 386 }
 387
 388 static void
 389 hsw_audio_config_update(struct intel_encoder *encoder,
 390                         const struct intel_crtc_state *crtc_state)
 391 {
 392         if (intel_crtc_has_dp_encoder(crtc_state))
 393                 hsw_dp_audio_config_update(encoder, crtc_state);
 394         else
 395                 hsw_hdmi_audio_config_update(encoder, crtc_state);
 396 }
 397
 398 static void hsw_audio_codec_disable(struct intel_encoder *encoder,
 399                                     const struct intel_crtc_state *old_crtc_state,
 400                                     const struct drm_connector_state *old_conn_state)
 401 {
 402         struct drm_i915_private *i915 = to_i915(encoder->base.dev);
 403         struct intel_crtc *crtc = to_intel_crtc(old_crtc_state->uapi.crtc);
 404         enum transcoder cpu_transcoder = old_crtc_state->cpu_transcoder;
 405
 406         mutex_lock(&i915->display.audio.mutex);
 407
 408         /* Disable timestamps */
 409         intel_de_rmw(i915, HSW_AUD_CFG(cpu_transcoder),
 410                      AUD_CONFIG_N_VALUE_INDEX |
 411                      AUD_CONFIG_UPPER_N_MASK |
 412                      AUD_CONFIG_LOWER_N_MASK,
 413                      AUD_CONFIG_N_PROG_ENABLE |
 414                      (intel_crtc_has_dp_encoder(old_crtc_state) ?
 415                       AUD_CONFIG_N_VALUE_INDEX : 0));
 416
 417         /* Invalidate ELD */
 418         intel_de_rmw(i915, HSW_AUD_PIN_ELD_CP_VLD,
 419                      AUDIO_ELD_VALID(cpu_transcoder), 0);
 420
 421         intel_crtc_wait_for_next_vblank(crtc);
 422         intel_crtc_wait_for_next_vblank(crtc);
 423
 424         /* Disable audio presence detect */
 425         intel_de_rmw(i915, HSW_AUD_PIN_ELD_CP_VLD,
 426                      AUDIO_OUTPUT_ENABLE(cpu_transcoder), 0);
 427
 428         if (needs_wa_14020863754(i915))
 429                 intel_de_rmw(i915, AUD_CHICKENBIT_REG3, DACBE_DISABLE_MIN_HBLANK_FIX, 0);
 430
 431         mutex_unlock(&i915->display.audio.mutex);
 432 }
 433
 434 static unsigned int calc_hblank_early_prog(struct intel_encoder *encoder,
 435                                            const struct intel_crtc_state *crtc_state)
 436 {
 437         struct drm_i915_private *i915 = to_i915(encoder->base.dev);
 438         unsigned int link_clks_available, link_clks_required;
 439         unsigned int tu_data, tu_line, link_clks_active;
 440         unsigned int h_active, h_total, hblank_delta, pixel_clk;
 441         unsigned int fec_coeff, cdclk, vdsc_bppx16;
 442         unsigned int link_clk, lanes;
 443         unsigned int hblank_rise;
 444
 445         h_active = crtc_state->hw.adjusted_mode.crtc_hdisplay;
 446         h_total = crtc_state->hw.adjusted_mode.crtc_htotal;
 447         pixel_clk = crtc_state->hw.adjusted_mode.crtc_clock;
 448         vdsc_bppx16 = crtc_state->dsc.compressed_bpp_x16;
 449         cdclk = i915->display.cdclk.hw.cdclk;
 450         /* fec= 0.972261, using rounding multiplier of 1000000 */
 451         fec_coeff = 972261;
 452         link_clk = crtc_state->port_clock;
 453         lanes = crtc_state->lane_count;
 454
 455         drm_dbg_kms(&i915->drm,
 456                     "h_active = %u link_clk = %u : lanes = %u vdsc_bpp = " FXP_Q4_FMT " cdclk = %u\n",
 457                     h_active, link_clk, lanes, FXP_Q4_ARGS(vdsc_bppx16), cdclk);
 458
 459         if (WARN_ON(!link_clk || !pixel_clk || !lanes || !vdsc_bppx16 || !cdclk))
 460                 return 0;
 461
 462         link_clks_available = (h_total - h_active) * link_clk / pixel_clk - 28;
 463         link_clks_required = DIV_ROUND_UP(192000 * h_total, 1000 * pixel_clk) * (48 / lanes + 2);
 464
 465         if (link_clks_available > link_clks_required)
 466                 hblank_delta = 32;
 467         else
 468                 hblank_delta = DIV64_U64_ROUND_UP(mul_u32_u32(5 * (link_clk + cdclk), pixel_clk),
 469                                                   mul_u32_u32(link_clk, cdclk));
 470
 471         tu_data = div64_u64(mul_u32_u32(pixel_clk * vdsc_bppx16 * 8, 1000000),
 472                             mul_u32_u32(link_clk * lanes * 16, fec_coeff));
 473         tu_line = div64_u64(h_active * mul_u32_u32(link_clk, fec_coeff),
 474                             mul_u32_u32(64 * pixel_clk, 1000000));
 475         link_clks_active  = (tu_line - 1) * 64 + tu_data;
 476
 477         hblank_rise = (link_clks_active + 6 * DIV_ROUND_UP(link_clks_active, 250) + 4) * pixel_clk / link_clk;
 478
 479         return h_active - hblank_rise + hblank_delta;
 480 }
 481
 482 static unsigned int calc_samples_room(const struct intel_crtc_state *crtc_state)
 483 {
 484         unsigned int h_active, h_total, pixel_clk;
 485         unsigned int link_clk, lanes;
 486
 487         h_active = crtc_state->hw.adjusted_mode.hdisplay;
 488         h_total = crtc_state->hw.adjusted_mode.htotal;
 489         pixel_clk = crtc_state->hw.adjusted_mode.clock;
 490         link_clk = crtc_state->port_clock;
 491         lanes = crtc_state->lane_count;
 492
 493         return ((h_total - h_active) * link_clk - 12 * pixel_clk) /
 494                 (pixel_clk * (48 / lanes + 2));
 495 }
 496
 497 static void enable_audio_dsc_wa(struct intel_encoder *encoder,
 498                                 const struct intel_crtc_state *crtc_state)
 499 {
 500         struct drm_i915_private *i915 = to_i915(encoder->base.dev);
 501         enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
 502         unsigned int hblank_early_prog, samples_room;
 503         unsigned int val;
 504
 505         if (DISPLAY_VER(i915) < 11)
 506                 return;
 507
 508         val = intel_de_read(i915, AUD_CONFIG_BE);
 509
 510         if (DISPLAY_VER(i915) == 11)
 511                 val |= HBLANK_EARLY_ENABLE_ICL(cpu_transcoder);
 512         else if (DISPLAY_VER(i915) >= 12)
 513                 val |= HBLANK_EARLY_ENABLE_TGL(cpu_transcoder);
 514
 515         if (crtc_state->dsc.compression_enable &&
 516             crtc_state->hw.adjusted_mode.hdisplay >= 3840 &&
 517             crtc_state->hw.adjusted_mode.vdisplay >= 2160) {
 518                 /* Get hblank early enable value required */
 519                 val &= ~HBLANK_START_COUNT_MASK(cpu_transcoder);
 520                 hblank_early_prog = calc_hblank_early_prog(encoder, crtc_state);
 521                 if (hblank_early_prog < 32)
 522                         val |= HBLANK_START_COUNT(cpu_transcoder, HBLANK_START_COUNT_32);
 523                 else if (hblank_early_prog < 64)
 524                         val |= HBLANK_START_COUNT(cpu_transcoder, HBLANK_START_COUNT_64);
 525                 else if (hblank_early_prog < 96)
 526                         val |= HBLANK_START_COUNT(cpu_transcoder, HBLANK_START_COUNT_96);
 527                 else
 528                         val |= HBLANK_START_COUNT(cpu_transcoder, HBLANK_START_COUNT_128);
 529
 530                 /* Get samples room value required */
 531                 val &= ~NUMBER_SAMPLES_PER_LINE_MASK(cpu_transcoder);
 532                 samples_room = calc_samples_room(crtc_state);
 533                 if (samples_room < 3)
 534                         val |= NUMBER_SAMPLES_PER_LINE(cpu_transcoder, samples_room);
 535                 else /* Program 0 i.e "All Samples available in buffer" */
 536                         val |= NUMBER_SAMPLES_PER_LINE(cpu_transcoder, 0x0);
 537         }
 538
 539         intel_de_write(i915, AUD_CONFIG_BE, val);
 540 }
 541
 542 static void hsw_audio_codec_enable(struct intel_encoder *encoder,
 543                                    const struct intel_crtc_state *crtc_state,
 544                                    const struct drm_connector_state *conn_state)
 545 {
 546         struct drm_i915_private *i915 = to_i915(encoder->base.dev);
 547         struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
 548         enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
 549
 550         mutex_lock(&i915->display.audio.mutex);
 551
 552         /* Enable Audio WA for 4k DSC usecases */
 553         if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_DP))
 554                 enable_audio_dsc_wa(encoder, crtc_state);
 555
 556         if (needs_wa_14020863754(i915))
 557                 intel_de_rmw(i915, AUD_CHICKENBIT_REG3, 0, DACBE_DISABLE_MIN_HBLANK_FIX);
 558
 559         /* Enable audio presence detect */
 560         intel_de_rmw(i915, HSW_AUD_PIN_ELD_CP_VLD,
 561                      0, AUDIO_OUTPUT_ENABLE(cpu_transcoder));
 562
 563         intel_crtc_wait_for_next_vblank(crtc);
 564
 565         /* Invalidate ELD */
 566         intel_de_rmw(i915, HSW_AUD_PIN_ELD_CP_VLD,
 567                      AUDIO_ELD_VALID(cpu_transcoder), 0);
 568
 569         /*
 570          * The audio componenent is used to convey the ELD
 571          * instead using of the hardware ELD buffer.
 572          */
 573
 574         /* Enable timestamps */
 575         hsw_audio_config_update(encoder, crtc_state);
 576
 577         mutex_unlock(&i915->display.audio.mutex);
 578 }
 579
 580 struct ibx_audio_regs {
 581         i915_reg_t hdmiw_hdmiedid, aud_config, aud_cntl_st, aud_cntrl_st2;
 582 };
 583
 584 static void ibx_audio_regs_init(struct drm_i915_private *i915,
 585                                 enum pipe pipe,
 586                                 struct ibx_audio_regs *regs)
 587 {
 588         if (IS_VALLEYVIEW(i915) || IS_CHERRYVIEW(i915)) {
 589                 regs->hdmiw_hdmiedid = VLV_HDMIW_HDMIEDID(pipe);
 590                 regs->aud_config = VLV_AUD_CFG(pipe);
 591                 regs->aud_cntl_st = VLV_AUD_CNTL_ST(pipe);
 592                 regs->aud_cntrl_st2 = VLV_AUD_CNTL_ST2;
 593         } else if (HAS_PCH_CPT(i915)) {
 594                 regs->hdmiw_hdmiedid = CPT_HDMIW_HDMIEDID(pipe);
 595                 regs->aud_config = CPT_AUD_CFG(pipe);
 596                 regs->aud_cntl_st = CPT_AUD_CNTL_ST(pipe);
 597                 regs->aud_cntrl_st2 = CPT_AUD_CNTRL_ST2;
 598         } else if (HAS_PCH_IBX(i915)) {
 599                 regs->hdmiw_hdmiedid = IBX_HDMIW_HDMIEDID(pipe);
 600                 regs->aud_config = IBX_AUD_CFG(pipe);
 601                 regs->aud_cntl_st = IBX_AUD_CNTL_ST(pipe);
 602                 regs->aud_cntrl_st2 = IBX_AUD_CNTL_ST2;
 603         }
 604 }
 605
 606 static void ibx_audio_codec_disable(struct intel_encoder *encoder,
 607                                     const struct intel_crtc_state *old_crtc_state,
 608                                     const struct drm_connector_state *old_conn_state)
 609 {
 610         struct drm_i915_private *i915 = to_i915(encoder->base.dev);
 611         struct intel_crtc *crtc = to_intel_crtc(old_crtc_state->uapi.crtc);
 612         enum port port = encoder->port;
 613         enum pipe pipe = crtc->pipe;
 614         struct ibx_audio_regs regs;
 615
 616         if (drm_WARN_ON(&i915->drm, port == PORT_A))
 617                 return;
 618
 619         ibx_audio_regs_init(i915, pipe, &regs);
 620
 621         mutex_lock(&i915->display.audio.mutex);
 622
 623         /* Disable timestamps */
 624         intel_de_rmw(i915, regs.aud_config,
 625                      AUD_CONFIG_N_VALUE_INDEX |
 626                      AUD_CONFIG_UPPER_N_MASK |
 627                      AUD_CONFIG_LOWER_N_MASK,
 628                      AUD_CONFIG_N_PROG_ENABLE |
 629                      (intel_crtc_has_dp_encoder(old_crtc_state) ?
 630                       AUD_CONFIG_N_VALUE_INDEX : 0));
 631
 632         /* Invalidate ELD */
 633         intel_de_rmw(i915, regs.aud_cntrl_st2,
 634                      IBX_ELD_VALID(port), 0);
 635
 636         mutex_unlock(&i915->display.audio.mutex);
 637
 638         intel_crtc_wait_for_next_vblank(crtc);
 639         intel_crtc_wait_for_next_vblank(crtc);
 640 }
 641
 642 static void ibx_audio_codec_enable(struct intel_encoder *encoder,
 643                                    const struct intel_crtc_state *crtc_state,
 644                                    const struct drm_connector_state *conn_state)
 645 {
 646         struct drm_i915_private *i915 = to_i915(encoder->base.dev);
 647         struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
 648         enum port port = encoder->port;
 649         enum pipe pipe = crtc->pipe;
 650         struct ibx_audio_regs regs;
 651
 652         if (drm_WARN_ON(&i915->drm, port == PORT_A))
 653                 return;
 654
 655         intel_crtc_wait_for_next_vblank(crtc);
 656
 657         ibx_audio_regs_init(i915, pipe, &regs);
 658
 659         mutex_lock(&i915->display.audio.mutex);
 660
 661         /* Invalidate ELD */
 662         intel_de_rmw(i915, regs.aud_cntrl_st2,
 663                      IBX_ELD_VALID(port), 0);
 664
 665         /*
 666          * The audio componenent is used to convey the ELD
 667          * instead using of the hardware ELD buffer.
 668          */
 669
 670         /* Enable timestamps */
 671         intel_de_rmw(i915, regs.aud_config,
 672                      AUD_CONFIG_N_VALUE_INDEX |
 673                      AUD_CONFIG_N_PROG_ENABLE |
 674                      AUD_CONFIG_PIXEL_CLOCK_HDMI_MASK,
 675                      (intel_crtc_has_dp_encoder(crtc_state) ?
 676                       AUD_CONFIG_N_VALUE_INDEX :
 677                       audio_config_hdmi_pixel_clock(crtc_state)));
 678
 679         mutex_unlock(&i915->display.audio.mutex);
 680 }
 681
 682 void intel_audio_sdp_split_update(const struct intel_crtc_state *crtc_state)
 683 {
 684         struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
 685         struct drm_i915_private *i915 = to_i915(crtc->base.dev);
 686         enum transcoder trans = crtc_state->cpu_transcoder;
 687
 688         if (HAS_DP20(i915))
 689                 intel_de_rmw(i915, AUD_DP_2DOT0_CTRL(trans), AUD_ENABLE_SDP_SPLIT,
 690                              crtc_state->sdp_split_enable ? AUD_ENABLE_SDP_SPLIT : 0);
 691 }
 692
 693 bool intel_audio_compute_config(struct intel_encoder *encoder,
 694                                 struct intel_crtc_state *crtc_state,
 695                                 struct drm_connector_state *conn_state)
 696 {
 697         struct drm_i915_private *i915 = to_i915(encoder->base.dev);
 698         struct drm_connector *connector = conn_state->connector;
 699         const struct drm_display_mode *adjusted_mode =
 700                 &crtc_state->hw.adjusted_mode;
 701
 702         if (!connector->eld[0]) {
 703                 drm_dbg_kms(&i915->drm,
 704                             "Bogus ELD on [CONNECTOR:%d:%s]\n",
 705                             connector->base.id, connector->name);
 706                 return false;
 707         }
 708
 709         BUILD_BUG_ON(sizeof(crtc_state->eld) != sizeof(connector->eld));
 710         memcpy(crtc_state->eld, connector->eld, sizeof(crtc_state->eld));
 711
 712         crtc_state->eld[6] = drm_av_sync_delay(connector, adjusted_mode) / 2;
 713
 714         return true;
 715 }
 716
 717 /**
 718  * intel_audio_codec_enable - Enable the audio codec for HD audio
 719  * @encoder: encoder on which to enable audio
 720  * @crtc_state: pointer to the current crtc state.
 721  * @conn_state: pointer to the current connector state.
 722  *
 723  * The enable sequences may only be performed after enabling the transcoder and
 724  * port, and after completed link training.
 725  */
 726 void intel_audio_codec_enable(struct intel_encoder *encoder,
 727                               const struct intel_crtc_state *crtc_state,
 728                               const struct drm_connector_state *conn_state)
 729 {
 730         struct drm_i915_private *i915 = to_i915(encoder->base.dev);
 731         struct i915_audio_component *acomp = i915->display.audio.component;
 732         struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
 733         struct intel_connector *connector = to_intel_connector(conn_state->connector);
 734         enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
 735         struct intel_audio_state *audio_state;
 736         enum port port = encoder->port;
 737
 738         if (!crtc_state->has_audio)
 739                 return;
 740
 741         drm_dbg_kms(&i915->drm, "[CONNECTOR:%d:%s][ENCODER:%d:%s] Enable audio codec on [CRTC:%d:%s], %u bytes ELD\n",
 742                     connector->base.base.id, connector->base.name,
 743                     encoder->base.base.id, encoder->base.name,
 744                     crtc->base.base.id, crtc->base.name,
 745                     drm_eld_size(crtc_state->eld));
 746
 747         if (i915->display.funcs.audio)
 748                 i915->display.funcs.audio->audio_codec_enable(encoder,
 749                                                               crtc_state,
 750                                                               conn_state);
 751
 752         mutex_lock(&i915->display.audio.mutex);
 753
 754         audio_state = &i915->display.audio.state[cpu_transcoder];
 755
 756         audio_state->encoder = encoder;
 757         BUILD_BUG_ON(sizeof(audio_state->eld) != sizeof(crtc_state->eld));
 758         memcpy(audio_state->eld, crtc_state->eld, sizeof(audio_state->eld));
 759
 760         mutex_unlock(&i915->display.audio.mutex);
 761
 762         if (acomp && acomp->base.audio_ops &&
 763             acomp->base.audio_ops->pin_eld_notify) {
 764                 /* audio drivers expect cpu_transcoder = -1 to indicate Non-MST cases */
 765                 if (!intel_crtc_has_type(crtc_state, INTEL_OUTPUT_DP_MST))
 766                         cpu_transcoder = -1;
 767                 acomp->base.audio_ops->pin_eld_notify(acomp->base.audio_ops->audio_ptr,
 768                                                       (int)port, (int)cpu_transcoder);
 769         }
 770
 771         intel_lpe_audio_notify(i915, cpu_transcoder, port, crtc_state->eld,
 772                                crtc_state->port_clock,
 773                                intel_crtc_has_dp_encoder(crtc_state));
 774 }
 775
 776 /**
 777  * intel_audio_codec_disable - Disable the audio codec for HD audio
 778  * @encoder: encoder on which to disable audio
 779  * @old_crtc_state: pointer to the old crtc state.
 780  * @old_conn_state: pointer to the old connector state.
 781  *
 782  * The disable sequences must be performed before disabling the transcoder or
 783  * port.
 784  */
 785 void intel_audio_codec_disable(struct intel_encoder *encoder,
 786                                const struct intel_crtc_state *old_crtc_state,
 787                                const struct drm_connector_state *old_conn_state)
 788 {
 789         struct drm_i915_private *i915 = to_i915(encoder->base.dev);
 790         struct i915_audio_component *acomp = i915->display.audio.component;
 791         struct intel_crtc *crtc = to_intel_crtc(old_crtc_state->uapi.crtc);
 792         struct intel_connector *connector = to_intel_connector(old_conn_state->connector);
 793         enum transcoder cpu_transcoder = old_crtc_state->cpu_transcoder;
 794         struct intel_audio_state *audio_state;
 795         enum port port = encoder->port;
 796
 797         if (!old_crtc_state->has_audio)
 798                 return;
 799
 800         drm_dbg_kms(&i915->drm, "[CONNECTOR:%d:%s][ENCODER:%d:%s] Disable audio codec on [CRTC:%d:%s]\n",
 801                     connector->base.base.id, connector->base.name,
 802                     encoder->base.base.id, encoder->base.name,
 803                     crtc->base.base.id, crtc->base.name);
 804
 805         if (i915->display.funcs.audio)
 806                 i915->display.funcs.audio->audio_codec_disable(encoder,
 807                                                                old_crtc_state,
 808                                                                old_conn_state);
 809
 810         mutex_lock(&i915->display.audio.mutex);
 811
 812         audio_state = &i915->display.audio.state[cpu_transcoder];
 813
 814         audio_state->encoder = NULL;
 815         memset(audio_state->eld, 0, sizeof(audio_state->eld));
 816
 817         mutex_unlock(&i915->display.audio.mutex);
 818
 819         if (acomp && acomp->base.audio_ops &&
 820             acomp->base.audio_ops->pin_eld_notify) {
 821                 /* audio drivers expect cpu_transcoder = -1 to indicate Non-MST cases */
 822                 if (!intel_crtc_has_type(old_crtc_state, INTEL_OUTPUT_DP_MST))
 823                         cpu_transcoder = -1;
 824                 acomp->base.audio_ops->pin_eld_notify(acomp->base.audio_ops->audio_ptr,
 825                                                       (int)port, (int)cpu_transcoder);
 826         }
 827
 828         intel_lpe_audio_notify(i915, cpu_transcoder, port, NULL, 0, false);
 829 }
 830
 831 static void intel_acomp_get_config(struct intel_encoder *encoder,
 832                                    struct intel_crtc_state *crtc_state)
 833 {
 834         struct drm_i915_private *i915 = to_i915(encoder->base.dev);
 835         enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
 836         struct intel_audio_state *audio_state;
 837
 838         mutex_lock(&i915->display.audio.mutex);
 839
 840         audio_state = &i915->display.audio.state[cpu_transcoder];
 841
 842         if (audio_state->encoder)
 843                 memcpy(crtc_state->eld, audio_state->eld, sizeof(audio_state->eld));
 844
 845         mutex_unlock(&i915->display.audio.mutex);
 846 }
 847
 848 void intel_audio_codec_get_config(struct intel_encoder *encoder,
 849                                   struct intel_crtc_state *crtc_state)
 850 {
 851         struct drm_i915_private *i915 = to_i915(encoder->base.dev);
 852
 853         if (!crtc_state->has_audio)
 854                 return;
 855
 856         if (i915->display.funcs.audio)
 857                 i915->display.funcs.audio->audio_codec_get_config(encoder, crtc_state);
 858 }
 859
 860 static const struct intel_audio_funcs g4x_audio_funcs = {
 861         .audio_codec_enable = g4x_audio_codec_enable,
 862         .audio_codec_disable = g4x_audio_codec_disable,
 863         .audio_codec_get_config = g4x_audio_codec_get_config,
 864 };
 865
 866 static const struct intel_audio_funcs ibx_audio_funcs = {
 867         .audio_codec_enable = ibx_audio_codec_enable,
 868         .audio_codec_disable = ibx_audio_codec_disable,
 869         .audio_codec_get_config = intel_acomp_get_config,
 870 };
 871
 872 static const struct intel_audio_funcs hsw_audio_funcs = {
 873         .audio_codec_enable = hsw_audio_codec_enable,
 874         .audio_codec_disable = hsw_audio_codec_disable,
 875         .audio_codec_get_config = intel_acomp_get_config,
 876 };
 877
 878 /**
 879  * intel_audio_hooks_init - Set up chip specific audio hooks
 880  * @i915: device private
 881  */
 882 void intel_audio_hooks_init(struct drm_i915_private *i915)
 883 {
 884         if (IS_G4X(i915))
 885                 i915->display.funcs.audio = &g4x_audio_funcs;
 886         else if (IS_VALLEYVIEW(i915) || IS_CHERRYVIEW(i915) ||
 887                  HAS_PCH_CPT(i915) || HAS_PCH_IBX(i915))
 888                 i915->display.funcs.audio = &ibx_audio_funcs;
 889         else if (IS_HASWELL(i915) || DISPLAY_VER(i915) >= 8)
 890                 i915->display.funcs.audio = &hsw_audio_funcs;
 891 }
 892
 893 struct aud_ts_cdclk_m_n {
 894         u8 m;
 895         u16 n;
 896 };
 897
 898 void intel_audio_cdclk_change_pre(struct drm_i915_private *i915)
 899 {
 900         if (DISPLAY_VER(i915) >= 13)
 901                 intel_de_rmw(i915, AUD_TS_CDCLK_M, AUD_TS_CDCLK_M_EN, 0);
 902 }
 903
 904 static void get_aud_ts_cdclk_m_n(int refclk, int cdclk, struct aud_ts_cdclk_m_n *aud_ts)
 905 {
 906         aud_ts->m = 60;
 907         aud_ts->n = cdclk * aud_ts->m / 24000;
 908 }
 909
 910 void intel_audio_cdclk_change_post(struct drm_i915_private *i915)
 911 {
 912         struct aud_ts_cdclk_m_n aud_ts;
 913
 914         if (DISPLAY_VER(i915) >= 13) {
 915                 get_aud_ts_cdclk_m_n(i915->display.cdclk.hw.ref, i915->display.cdclk.hw.cdclk, &aud_ts);
 916
 917                 intel_de_write(i915, AUD_TS_CDCLK_N, aud_ts.n);
 918                 intel_de_write(i915, AUD_TS_CDCLK_M, aud_ts.m | AUD_TS_CDCLK_M_EN);
 919                 drm_dbg_kms(&i915->drm, "aud_ts_cdclk set to M=%u, N=%u\n", aud_ts.m, aud_ts.n);
 920         }
 921 }
 922
 923 static int glk_force_audio_cdclk_commit(struct intel_atomic_state *state,
 924                                         struct intel_crtc *crtc,
 925                                         bool enable)
 926 {
 927         struct intel_cdclk_state *cdclk_state;
 928         int ret;
 929
 930         /* need to hold at least one crtc lock for the global state */
 931         ret = drm_modeset_lock(&crtc->base.mutex, state->base.acquire_ctx);
 932         if (ret)
 933                 return ret;
 934
 935         cdclk_state = intel_atomic_get_cdclk_state(state);
 936         if (IS_ERR(cdclk_state))
 937                 return PTR_ERR(cdclk_state);
 938
 939         cdclk_state->force_min_cdclk = enable ? 2 * 96000 : 0;
 940
 941         return drm_atomic_commit(&state->base);
 942 }
 943
 944 static void glk_force_audio_cdclk(struct drm_i915_private *i915,
 945                                   bool enable)
 946 {
 947         struct drm_modeset_acquire_ctx ctx;
 948         struct drm_atomic_state *state;
 949         struct intel_crtc *crtc;
 950         int ret;
 951
 952         crtc = intel_first_crtc(i915);
 953         if (!crtc)
 954                 return;
 955
 956         drm_modeset_acquire_init(&ctx, 0);
 957         state = drm_atomic_state_alloc(&i915->drm);
 958         if (drm_WARN_ON(&i915->drm, !state))
 959                 return;
 960
 961         state->acquire_ctx = &ctx;
 962         to_intel_atomic_state(state)->internal = true;
 963
 964 retry:
 965         ret = glk_force_audio_cdclk_commit(to_intel_atomic_state(state), crtc,
 966                                            enable);
 967         if (ret == -EDEADLK) {
 968                 drm_atomic_state_clear(state);
 969                 drm_modeset_backoff(&ctx);
 970                 goto retry;
 971         }
 972
 973         drm_WARN_ON(&i915->drm, ret);
 974
 975         drm_atomic_state_put(state);
 976
 977         drm_modeset_drop_locks(&ctx);
 978         drm_modeset_acquire_fini(&ctx);
 979 }
 980
 981 static unsigned long i915_audio_component_get_power(struct device *kdev)
 982 {
 983         struct intel_display *display = to_intel_display(kdev);
 984         struct drm_i915_private *i915 = to_i915(display->drm);
 985         intel_wakeref_t wakeref;
 986
 987         /* Catch potential impedance mismatches before they occur! */
 988         BUILD_BUG_ON(sizeof(intel_wakeref_t) > sizeof(unsigned long));
 989
 990         wakeref = intel_display_power_get(i915, POWER_DOMAIN_AUDIO_PLAYBACK);
 991
 992         if (i915->display.audio.power_refcount++ == 0) {
 993                 if (DISPLAY_VER(i915) >= 9) {
 994                         intel_de_write(i915, AUD_FREQ_CNTRL,
 995                                        i915->display.audio.freq_cntrl);
 996                         drm_dbg_kms(&i915->drm,
 997                                     "restored AUD_FREQ_CNTRL to 0x%x\n",
 998                                     i915->display.audio.freq_cntrl);
 999                 }
1000
1001                 /* Force CDCLK to 2*BCLK as long as we need audio powered. */
1002                 if (IS_GEMINILAKE(i915))
1003                         glk_force_audio_cdclk(i915, true);
1004
1005                 if (DISPLAY_VER(i915) >= 10)
1006                         intel_de_rmw(i915, AUD_PIN_BUF_CTL,
1007                                      0, AUD_PIN_BUF_ENABLE);
1008         }
1009
1010         return (unsigned long)wakeref;
1011 }
1012
1013 static void i915_audio_component_put_power(struct device *kdev,
1014                                            unsigned long cookie)
1015 {
1016         struct intel_display *display = to_intel_display(kdev);
1017         struct drm_i915_private *i915 = to_i915(display->drm);
1018         intel_wakeref_t wakeref = (intel_wakeref_t)cookie;
1019
1020         /* Stop forcing CDCLK to 2*BCLK if no need for audio to be powered. */
1021         if (--i915->display.audio.power_refcount == 0)
1022                 if (IS_GEMINILAKE(i915))
1023                         glk_force_audio_cdclk(i915, false);
1024
1025         intel_display_power_put(i915, POWER_DOMAIN_AUDIO_PLAYBACK, wakeref);
1026 }
1027
1028 static void i915_audio_component_codec_wake_override(struct device *kdev,
1029                                                      bool enable)
1030 {
1031         struct intel_display *display = to_intel_display(kdev);
1032         struct drm_i915_private *i915 = to_i915(display->drm);
1033         unsigned long cookie;
1034
1035         if (DISPLAY_VER(i915) < 9)
1036                 return;
1037
1038         cookie = i915_audio_component_get_power(kdev);
1039
1040         /*
1041          * Enable/disable generating the codec wake signal, overriding the
1042          * internal logic to generate the codec wake to controller.
1043          */
1044         intel_de_rmw(i915, HSW_AUD_CHICKENBIT,
1045                      SKL_AUD_CODEC_WAKE_SIGNAL, 0);
1046         usleep_range(1000, 1500);
1047
1048         if (enable) {
1049                 intel_de_rmw(i915, HSW_AUD_CHICKENBIT,
1050                              0, SKL_AUD_CODEC_WAKE_SIGNAL);
1051                 usleep_range(1000, 1500);
1052         }
1053
1054         i915_audio_component_put_power(kdev, cookie);
1055 }
1056
1057 /* Get CDCLK in kHz  */
1058 static int i915_audio_component_get_cdclk_freq(struct device *kdev)
1059 {
1060         struct intel_display *display = to_intel_display(kdev);
1061         struct drm_i915_private *i915 = to_i915(display->drm);
1062
1063         if (drm_WARN_ON_ONCE(&i915->drm, !HAS_DDI(i915)))
1064                 return -ENODEV;
1065
1066         return i915->display.cdclk.hw.cdclk;
1067 }
1068
1069 /*
1070  * get the intel audio state according to the parameter port and cpu_transcoder
1071  * MST & (cpu_transcoder >= 0): return the audio.state[cpu_transcoder].encoder],
1072  *   when port is matched
1073  * MST & (cpu_transcoder < 0): this is invalid
1074  * Non-MST & (cpu_transcoder >= 0): only cpu_transcoder = 0 (the first device entry)
1075  *   will get the right intel_encoder with port matched
1076  * Non-MST & (cpu_transcoder < 0): get the right intel_encoder with port matched
1077  */
1078 static struct intel_audio_state *find_audio_state(struct drm_i915_private *i915,
1079                                                   int port, int cpu_transcoder)
1080 {
1081         /* MST */
1082         if (cpu_transcoder >= 0) {
1083                 struct intel_audio_state *audio_state;
1084                 struct intel_encoder *encoder;
1085
1086                 if (drm_WARN_ON(&i915->drm,
1087                                 cpu_transcoder >= ARRAY_SIZE(i915->display.audio.state)))
1088                         return NULL;
1089
1090                 audio_state = &i915->display.audio.state[cpu_transcoder];
1091                 encoder = audio_state->encoder;
1092
1093                 if (encoder && encoder->port == port &&
1094                     encoder->type == INTEL_OUTPUT_DP_MST)
1095                         return audio_state;
1096         }
1097
1098         /* Non-MST */
1099         if (cpu_transcoder > 0)
1100                 return NULL;
1101
1102         for_each_cpu_transcoder(i915, cpu_transcoder) {
1103                 struct intel_audio_state *audio_state;
1104                 struct intel_encoder *encoder;
1105
1106                 audio_state = &i915->display.audio.state[cpu_transcoder];
1107                 encoder = audio_state->encoder;
1108
1109                 if (encoder && encoder->port == port &&
1110                     encoder->type != INTEL_OUTPUT_DP_MST)
1111                         return audio_state;
1112         }
1113
1114         return NULL;
1115 }
1116
1117 static int i915_audio_component_sync_audio_rate(struct device *kdev, int port,
1118                                                 int cpu_transcoder, int rate)
1119 {
1120         struct intel_display *display = to_intel_display(kdev);
1121         struct drm_i915_private *i915 = to_i915(display->drm);
1122         struct i915_audio_component *acomp = i915->display.audio.component;
1123         const struct intel_audio_state *audio_state;
1124         struct intel_encoder *encoder;
1125         struct intel_crtc *crtc;
1126         unsigned long cookie;
1127         int err = 0;
1128
1129         if (!HAS_DDI(i915))
1130                 return 0;
1131
1132         cookie = i915_audio_component_get_power(kdev);
1133         mutex_lock(&i915->display.audio.mutex);
1134
1135         audio_state = find_audio_state(i915, port, cpu_transcoder);
1136         if (!audio_state) {
1137                 drm_dbg_kms(&i915->drm, "Not valid for port %c\n", port_name(port));
1138                 err = -ENODEV;
1139                 goto unlock;
1140         }
1141
1142         encoder = audio_state->encoder;
1143
1144         /* FIXME stop using the legacy crtc pointer */
1145         crtc = to_intel_crtc(encoder->base.crtc);
1146
1147         /* port must be valid now, otherwise the cpu_transcoder will be invalid */
1148         acomp->aud_sample_rate[port] = rate;
1149
1150         /* FIXME get rid of the crtc->config stuff */
1151         hsw_audio_config_update(encoder, crtc->config);
1152
1153  unlock:
1154         mutex_unlock(&i915->display.audio.mutex);
1155         i915_audio_component_put_power(kdev, cookie);
1156         return err;
1157 }
1158
1159 static int i915_audio_component_get_eld(struct device *kdev, int port,
1160                                         int cpu_transcoder, bool *enabled,
1161                                         unsigned char *buf, int max_bytes)
1162 {
1163         struct intel_display *display = to_intel_display(kdev);
1164         struct drm_i915_private *i915 = to_i915(display->drm);
1165         const struct intel_audio_state *audio_state;
1166         int ret = 0;
1167
1168         mutex_lock(&i915->display.audio.mutex);
1169
1170         audio_state = find_audio_state(i915, port, cpu_transcoder);
1171         if (!audio_state) {
1172                 drm_dbg_kms(&i915->drm, "Not valid for port %c\n", port_name(port));
1173                 mutex_unlock(&i915->display.audio.mutex);
1174                 return -EINVAL;
1175         }
1176
1177         *enabled = audio_state->encoder != NULL;
1178         if (*enabled) {
1179                 const u8 *eld = audio_state->eld;
1180
1181                 ret = drm_eld_size(eld);
1182                 memcpy(buf, eld, min(max_bytes, ret));
1183         }
1184
1185         mutex_unlock(&i915->display.audio.mutex);
1186         return ret;
1187 }
1188
1189 static const struct drm_audio_component_ops i915_audio_component_ops = {
1190         .owner          = THIS_MODULE,
1191         .get_power      = i915_audio_component_get_power,
1192         .put_power      = i915_audio_component_put_power,
1193         .codec_wake_override = i915_audio_component_codec_wake_override,
1194         .get_cdclk_freq = i915_audio_component_get_cdclk_freq,
1195         .sync_audio_rate = i915_audio_component_sync_audio_rate,
1196         .get_eld        = i915_audio_component_get_eld,
1197 };
1198
1199 static int i915_audio_component_bind(struct device *drv_kdev,
1200                                      struct device *hda_kdev, void *data)
1201 {
1202         struct intel_display *display = to_intel_display(drv_kdev);
1203         struct drm_i915_private *i915 = to_i915(display->drm);
1204         struct i915_audio_component *acomp = data;
1205         int i;
1206
1207         if (drm_WARN_ON(&i915->drm, acomp->base.ops || acomp->base.dev))
1208                 return -EEXIST;
1209
1210         if (drm_WARN_ON(&i915->drm,
1211                         !device_link_add(hda_kdev, drv_kdev,
1212                                          DL_FLAG_STATELESS)))
1213                 return -ENOMEM;
1214
1215         drm_modeset_lock_all(&i915->drm);
1216         acomp->base.ops = &i915_audio_component_ops;
1217         acomp->base.dev = drv_kdev;
1218         BUILD_BUG_ON(MAX_PORTS != I915_MAX_PORTS);
1219         for (i = 0; i < ARRAY_SIZE(acomp->aud_sample_rate); i++)
1220                 acomp->aud_sample_rate[i] = 0;
1221         i915->display.audio.component = acomp;
1222         drm_modeset_unlock_all(&i915->drm);
1223
1224         return 0;
1225 }
1226
1227 static void i915_audio_component_unbind(struct device *drv_kdev,
1228                                         struct device *hda_kdev, void *data)
1229 {
1230         struct intel_display *display = to_intel_display(drv_kdev);
1231         struct drm_i915_private *i915 = to_i915(display->drm);
1232         struct i915_audio_component *acomp = data;
1233
1234         drm_modeset_lock_all(&i915->drm);
1235         acomp->base.ops = NULL;
1236         acomp->base.dev = NULL;
1237         i915->display.audio.component = NULL;
1238         drm_modeset_unlock_all(&i915->drm);
1239
1240         device_link_remove(hda_kdev, drv_kdev);
1241
1242         if (i915->display.audio.power_refcount)
1243                 drm_err(&i915->drm, "audio power refcount %d after unbind\n",
1244                         i915->display.audio.power_refcount);
1245 }
1246
1247 static const struct component_ops i915_audio_component_bind_ops = {
1248         .bind   = i915_audio_component_bind,
1249         .unbind = i915_audio_component_unbind,
1250 };
1251
1252 #define AUD_FREQ_TMODE_SHIFT    14
1253 #define AUD_FREQ_4T             0
1254 #define AUD_FREQ_8T             (2 << AUD_FREQ_TMODE_SHIFT)
1255 #define AUD_FREQ_PULLCLKS(x)    (((x) & 0x3) << 11)
1256 #define AUD_FREQ_BCLK_96M       BIT(4)
1257
1258 #define AUD_FREQ_GEN12          (AUD_FREQ_8T | AUD_FREQ_PULLCLKS(0) | AUD_FREQ_BCLK_96M)
1259 #define AUD_FREQ_TGL_BROKEN     (AUD_FREQ_8T | AUD_FREQ_PULLCLKS(2) | AUD_FREQ_BCLK_96M)
1260
1261 /**
1262  * i915_audio_component_init - initialize and register the audio component
1263  * @i915: i915 device instance
1264  *
1265  * This will register with the component framework a child component which
1266  * will bind dynamically to the snd_hda_intel driver's corresponding master
1267  * component when the latter is registered. During binding the child
1268  * initializes an instance of struct i915_audio_component which it receives
1269  * from the master. The master can then start to use the interface defined by
1270  * this struct. Each side can break the binding at any point by deregistering
1271  * its own component after which each side's component unbind callback is
1272  * called.
1273  *
1274  * We ignore any error during registration and continue with reduced
1275  * functionality (i.e. without HDMI audio).
1276  */
1277 static void i915_audio_component_init(struct drm_i915_private *i915)
1278 {
1279         u32 aud_freq, aud_freq_init;
1280
1281         if (DISPLAY_VER(i915) >= 9) {
1282                 aud_freq_init = intel_de_read(i915, AUD_FREQ_CNTRL);
1283
1284                 if (DISPLAY_VER(i915) >= 12)
1285                         aud_freq = AUD_FREQ_GEN12;
1286                 else
1287                         aud_freq = aud_freq_init;
1288
1289                 /* use BIOS provided value for TGL and RKL unless it is a known bad value */
1290                 if ((IS_TIGERLAKE(i915) || IS_ROCKETLAKE(i915)) &&
1291                     aud_freq_init != AUD_FREQ_TGL_BROKEN)
1292                         aud_freq = aud_freq_init;
1293
1294                 drm_dbg_kms(&i915->drm, "use AUD_FREQ_CNTRL of 0x%x (init value 0x%x)\n",
1295                             aud_freq, aud_freq_init);
1296
1297                 i915->display.audio.freq_cntrl = aud_freq;
1298         }
1299
1300         /* init with current cdclk */
1301         intel_audio_cdclk_change_post(i915);
1302 }
1303
1304 static void i915_audio_component_register(struct drm_i915_private *i915)
1305 {
1306         int ret;
1307
1308         ret = component_add_typed(i915->drm.dev,
1309                                   &i915_audio_component_bind_ops,
1310                                   I915_COMPONENT_AUDIO);
1311         if (ret < 0) {
1312                 drm_err(&i915->drm,
1313                         "failed to add audio component (%d)\n", ret);
1314                 /* continue with reduced functionality */
1315                 return;
1316         }
1317
1318         i915->display.audio.component_registered = true;
1319 }
1320
1321 /**
1322  * i915_audio_component_cleanup - deregister the audio component
1323  * @i915: i915 device instance
1324  *
1325  * Deregisters the audio component, breaking any existing binding to the
1326  * corresponding snd_hda_intel driver's master component.
1327  */
1328 static void i915_audio_component_cleanup(struct drm_i915_private *i915)
1329 {
1330         if (!i915->display.audio.component_registered)
1331                 return;
1332
1333         component_del(i915->drm.dev, &i915_audio_component_bind_ops);
1334         i915->display.audio.component_registered = false;
1335 }
1336
1337 /**
1338  * intel_audio_init() - Initialize the audio driver either using
1339  * component framework or using lpe audio bridge
1340  * @i915: the i915 drm device private data
1341  *
1342  */
1343 void intel_audio_init(struct drm_i915_private *i915)
1344 {
1345         if (intel_lpe_audio_init(i915) < 0)
1346                 i915_audio_component_init(i915);
1347 }
1348
1349 void intel_audio_register(struct drm_i915_private *i915)
1350 {
1351         if (!i915->display.audio.lpe.platdev)
1352                 i915_audio_component_register(i915);
1353 }
1354
1355 /**
1356  * intel_audio_deinit() - deinitialize the audio driver
1357  * @i915: the i915 drm device private data
1358  *
1359  */
1360 void intel_audio_deinit(struct drm_i915_private *i915)
1361 {
1362         if (i915->display.audio.lpe.platdev != NULL)
1363                 intel_lpe_audio_teardown(i915);
1364         else
1365                 i915_audio_component_cleanup(i915);
1366 }