drivers/gpu/drm/i915/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/kernel.h>
  25
  26 #include <drm/drmP.h>
  27 #include <drm/drm_edid.h>
  28 #include "intel_drv.h"
  29 #include "i915_drv.h"
  30
  31 static const struct {
  32         int clock;
  33         u32 config;
  34 } hdmi_audio_clock[] = {
  35         { DIV_ROUND_UP(25200 * 1000, 1001), AUD_CONFIG_PIXEL_CLOCK_HDMI_25175 },
  36         { 25200, AUD_CONFIG_PIXEL_CLOCK_HDMI_25200 }, /* default per bspec */
  37         { 27000, AUD_CONFIG_PIXEL_CLOCK_HDMI_27000 },
  38         { 27000 * 1001 / 1000, AUD_CONFIG_PIXEL_CLOCK_HDMI_27027 },
  39         { 54000, AUD_CONFIG_PIXEL_CLOCK_HDMI_54000 },
  40         { 54000 * 1001 / 1000, AUD_CONFIG_PIXEL_CLOCK_HDMI_54054 },
  41         { DIV_ROUND_UP(74250 * 1000, 1001), AUD_CONFIG_PIXEL_CLOCK_HDMI_74176 },
  42         { 74250, AUD_CONFIG_PIXEL_CLOCK_HDMI_74250 },
  43         { DIV_ROUND_UP(148500 * 1000, 1001), AUD_CONFIG_PIXEL_CLOCK_HDMI_148352 },
  44         { 148500, AUD_CONFIG_PIXEL_CLOCK_HDMI_148500 },
  45 };
  46
  47 /* get AUD_CONFIG_PIXEL_CLOCK_HDMI_* value for mode */
  48 static u32 audio_config_hdmi_pixel_clock(struct drm_display_mode *mode)
  49 {
  50         int i;
  51
  52         for (i = 0; i < ARRAY_SIZE(hdmi_audio_clock); i++) {
  53                 if (mode->clock == hdmi_audio_clock[i].clock)
  54                         break;
  55         }
  56
  57         if (i == ARRAY_SIZE(hdmi_audio_clock)) {
  58                 DRM_DEBUG_KMS("HDMI audio pixel clock setting for %d not found, falling back to defaults\n", mode->clock);
  59                 i = 1;
  60         }
  61
  62         DRM_DEBUG_KMS("Configuring HDMI audio for pixel clock %d (0x%08x)\n",
  63                       hdmi_audio_clock[i].clock,
  64                       hdmi_audio_clock[i].config);
  65
  66         return hdmi_audio_clock[i].config;
  67 }
  68
  69 static bool intel_eld_uptodate(struct drm_connector *connector,
  70                                int reg_eldv, uint32_t bits_eldv,
  71                                int reg_elda, uint32_t bits_elda,
  72                                int reg_edid)
  73 {
  74         struct drm_i915_private *dev_priv = connector->dev->dev_private;
  75         uint8_t *eld = connector->eld;
  76         uint32_t tmp;
  77         int i;
  78
  79         tmp = I915_READ(reg_eldv);
  80         tmp &= bits_eldv;
  81
  82         if (!tmp)
  83                 return false;
  84
  85         tmp = I915_READ(reg_elda);
  86         tmp &= ~bits_elda;
  87         I915_WRITE(reg_elda, tmp);
  88
  89         for (i = 0; i < eld[2]; i++)
  90                 if (I915_READ(reg_edid) != *((uint32_t *)eld + i))
  91                         return false;
  92
  93         return true;
  94 }
  95
  96 static void g4x_audio_codec_disable(struct intel_encoder *encoder)
  97 {
  98         struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
  99         uint32_t eldv, tmp;
 100
 101         DRM_DEBUG_KMS("Disable audio codec\n");
 102
 103         tmp = I915_READ(G4X_AUD_VID_DID);
 104         if (tmp == INTEL_AUDIO_DEVBLC || tmp == INTEL_AUDIO_DEVCL)
 105                 eldv = G4X_ELDV_DEVCL_DEVBLC;
 106         else
 107                 eldv = G4X_ELDV_DEVCTG;
 108
 109         /* Invalidate ELD */
 110         tmp = I915_READ(G4X_AUD_CNTL_ST);
 111         tmp &= ~eldv;
 112         I915_WRITE(G4X_AUD_CNTL_ST, tmp);
 113 }
 114
 115 static void g4x_audio_codec_enable(struct drm_connector *connector,
 116                                    struct intel_encoder *encoder,
 117                                    struct drm_display_mode *mode)
 118 {
 119         struct drm_i915_private *dev_priv = connector->dev->dev_private;
 120         uint8_t *eld = connector->eld;
 121         uint32_t eldv;
 122         uint32_t tmp;
 123         int len, i;
 124
 125         tmp = I915_READ(G4X_AUD_VID_DID);
 126         if (tmp == INTEL_AUDIO_DEVBLC || tmp == INTEL_AUDIO_DEVCL)
 127                 eldv = G4X_ELDV_DEVCL_DEVBLC;
 128         else
 129                 eldv = G4X_ELDV_DEVCTG;
 130
 131         if (intel_eld_uptodate(connector,
 132                                G4X_AUD_CNTL_ST, eldv,
 133                                G4X_AUD_CNTL_ST, G4X_ELD_ADDR_MASK,
 134                                G4X_HDMIW_HDMIEDID))
 135                 return;
 136
 137         tmp = I915_READ(G4X_AUD_CNTL_ST);
 138         tmp &= ~(eldv | G4X_ELD_ADDR_MASK);
 139         len = (tmp >> 9) & 0x1f;                /* ELD buffer size */
 140         I915_WRITE(G4X_AUD_CNTL_ST, tmp);
 141
 142         len = min_t(int, eld[2], len);
 143         DRM_DEBUG_DRIVER("ELD size %d\n", len);
 144         for (i = 0; i < len; i++)
 145                 I915_WRITE(G4X_HDMIW_HDMIEDID, *((uint32_t *)eld + i));
 146
 147         tmp = I915_READ(G4X_AUD_CNTL_ST);
 148         tmp |= eldv;
 149         I915_WRITE(G4X_AUD_CNTL_ST, tmp);
 150 }
 151
 152 static void hsw_audio_codec_disable(struct intel_encoder *encoder)
 153 {
 154         struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
 155         struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
 156         enum pipe pipe = intel_crtc->pipe;
 157         uint32_t tmp;
 158
 159         DRM_DEBUG_KMS("Disable audio codec on pipe %c\n", pipe_name(pipe));
 160
 161         /* Disable timestamps */
 162         tmp = I915_READ(HSW_AUD_CFG(pipe));
 163         tmp &= ~AUD_CONFIG_N_VALUE_INDEX;
 164         tmp |= AUD_CONFIG_N_PROG_ENABLE;
 165         tmp &= ~AUD_CONFIG_UPPER_N_MASK;
 166         tmp &= ~AUD_CONFIG_LOWER_N_MASK;
 167         if (intel_pipe_has_type(intel_crtc, INTEL_OUTPUT_DISPLAYPORT))
 168                 tmp |= AUD_CONFIG_N_VALUE_INDEX;
 169         I915_WRITE(HSW_AUD_CFG(pipe), tmp);
 170
 171         /* Invalidate ELD */
 172         tmp = I915_READ(HSW_AUD_PIN_ELD_CP_VLD);
 173         tmp &= ~(AUDIO_ELD_VALID_A << (pipe * 4));
 174         I915_WRITE(HSW_AUD_PIN_ELD_CP_VLD, tmp);
 175 }
 176
 177 static void hsw_audio_codec_enable(struct drm_connector *connector,
 178                                    struct intel_encoder *encoder,
 179                                    struct drm_display_mode *mode)
 180 {
 181         struct drm_i915_private *dev_priv = connector->dev->dev_private;
 182         struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
 183         enum pipe pipe = intel_crtc->pipe;
 184         const uint8_t *eld = connector->eld;
 185         uint32_t tmp;
 186         int len, i;
 187
 188         DRM_DEBUG_KMS("Enable audio codec on pipe %c, %u bytes ELD\n",
 189                       pipe_name(pipe), eld[2]);
 190
 191         /* Enable audio presence detect, invalidate ELD */
 192         tmp = I915_READ(HSW_AUD_PIN_ELD_CP_VLD);
 193         tmp |= AUDIO_OUTPUT_ENABLE_A << (pipe * 4);
 194         tmp &= ~(AUDIO_ELD_VALID_A << (pipe * 4));
 195         I915_WRITE(HSW_AUD_PIN_ELD_CP_VLD, tmp);
 196
 197         /*
 198          * FIXME: We're supposed to wait for vblank here, but we have vblanks
 199          * disabled during the mode set. The proper fix would be to push the
 200          * rest of the setup into a vblank work item, queued here, but the
 201          * infrastructure is not there yet.
 202          */
 203
 204         /* Reset ELD write address */
 205         tmp = I915_READ(HSW_AUD_DIP_ELD_CTRL(pipe));
 206         tmp &= ~IBX_ELD_ADDRESS_MASK;
 207         I915_WRITE(HSW_AUD_DIP_ELD_CTRL(pipe), tmp);
 208
 209         /* Up to 84 bytes of hw ELD buffer */
 210         len = min_t(int, eld[2], 21);
 211         for (i = 0; i < len; i++)
 212                 I915_WRITE(HSW_AUD_EDID_DATA(pipe), *((uint32_t *)eld + i));
 213
 214         /* ELD valid */
 215         tmp = I915_READ(HSW_AUD_PIN_ELD_CP_VLD);
 216         tmp |= AUDIO_ELD_VALID_A << (pipe * 4);
 217         I915_WRITE(HSW_AUD_PIN_ELD_CP_VLD, tmp);
 218
 219         /* Enable timestamps */
 220         tmp = I915_READ(HSW_AUD_CFG(pipe));
 221         tmp &= ~AUD_CONFIG_N_VALUE_INDEX;
 222         tmp &= ~AUD_CONFIG_N_PROG_ENABLE;
 223         tmp &= ~AUD_CONFIG_PIXEL_CLOCK_HDMI_MASK;
 224         if (intel_pipe_has_type(intel_crtc, INTEL_OUTPUT_DISPLAYPORT))
 225                 tmp |= AUD_CONFIG_N_VALUE_INDEX;
 226         else
 227                 tmp |= audio_config_hdmi_pixel_clock(mode);
 228         I915_WRITE(HSW_AUD_CFG(pipe), tmp);
 229 }
 230
 231 static void ilk_audio_codec_disable(struct intel_encoder *encoder)
 232 {
 233         struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
 234         struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
 235         struct intel_digital_port *intel_dig_port =
 236                 enc_to_dig_port(&encoder->base);
 237         enum port port = intel_dig_port->port;
 238         enum pipe pipe = intel_crtc->pipe;
 239         uint32_t tmp, eldv;
 240         int aud_config;
 241         int aud_cntrl_st2;
 242
 243         DRM_DEBUG_KMS("Disable audio codec on port %c, pipe %c\n",
 244                       port_name(port), pipe_name(pipe));
 245
 246         if (HAS_PCH_IBX(dev_priv->dev)) {
 247                 aud_config = IBX_AUD_CFG(pipe);
 248                 aud_cntrl_st2 = IBX_AUD_CNTL_ST2;
 249         } else if (IS_VALLEYVIEW(dev_priv)) {
 250                 aud_config = VLV_AUD_CFG(pipe);
 251                 aud_cntrl_st2 = VLV_AUD_CNTL_ST2;
 252         } else {
 253                 aud_config = CPT_AUD_CFG(pipe);
 254                 aud_cntrl_st2 = CPT_AUD_CNTRL_ST2;
 255         }
 256
 257         /* Disable timestamps */
 258         tmp = I915_READ(aud_config);
 259         tmp &= ~AUD_CONFIG_N_VALUE_INDEX;
 260         tmp |= AUD_CONFIG_N_PROG_ENABLE;
 261         tmp &= ~AUD_CONFIG_UPPER_N_MASK;
 262         tmp &= ~AUD_CONFIG_LOWER_N_MASK;
 263         if (intel_pipe_has_type(intel_crtc, INTEL_OUTPUT_DISPLAYPORT))
 264                 tmp |= AUD_CONFIG_N_VALUE_INDEX;
 265         I915_WRITE(aud_config, tmp);
 266
 267         if (WARN_ON(!port)) {
 268                 eldv = IBX_ELD_VALIDB;
 269                 eldv |= IBX_ELD_VALIDB << 4;
 270                 eldv |= IBX_ELD_VALIDB << 8;
 271         } else {
 272                 eldv = IBX_ELD_VALIDB << ((port - 1) * 4);
 273         }
 274
 275         /* Invalidate ELD */
 276         tmp = I915_READ(aud_cntrl_st2);
 277         tmp &= ~eldv;
 278         I915_WRITE(aud_cntrl_st2, tmp);
 279 }
 280
 281 static void ilk_audio_codec_enable(struct drm_connector *connector,
 282                                    struct intel_encoder *encoder,
 283                                    struct drm_display_mode *mode)
 284 {
 285         struct drm_i915_private *dev_priv = connector->dev->dev_private;
 286         struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
 287         struct intel_digital_port *intel_dig_port =
 288                 enc_to_dig_port(&encoder->base);
 289         enum port port = intel_dig_port->port;
 290         enum pipe pipe = intel_crtc->pipe;
 291         uint8_t *eld = connector->eld;
 292         uint32_t eldv;
 293         uint32_t tmp;
 294         int len, i;
 295         int hdmiw_hdmiedid;
 296         int aud_config;
 297         int aud_cntl_st;
 298         int aud_cntrl_st2;
 299
 300         DRM_DEBUG_KMS("Enable audio codec on port %c, pipe %c, %u bytes ELD\n",
 301                       port_name(port), pipe_name(pipe), eld[2]);
 302
 303         /*
 304          * FIXME: We're supposed to wait for vblank here, but we have vblanks
 305          * disabled during the mode set. The proper fix would be to push the
 306          * rest of the setup into a vblank work item, queued here, but the
 307          * infrastructure is not there yet.
 308          */
 309
 310         if (HAS_PCH_IBX(connector->dev)) {
 311                 hdmiw_hdmiedid = IBX_HDMIW_HDMIEDID(pipe);
 312                 aud_config = IBX_AUD_CFG(pipe);
 313                 aud_cntl_st = IBX_AUD_CNTL_ST(pipe);
 314                 aud_cntrl_st2 = IBX_AUD_CNTL_ST2;
 315         } else if (IS_VALLEYVIEW(connector->dev)) {
 316                 hdmiw_hdmiedid = VLV_HDMIW_HDMIEDID(pipe);
 317                 aud_config = VLV_AUD_CFG(pipe);
 318                 aud_cntl_st = VLV_AUD_CNTL_ST(pipe);
 319                 aud_cntrl_st2 = VLV_AUD_CNTL_ST2;
 320         } else {
 321                 hdmiw_hdmiedid = CPT_HDMIW_HDMIEDID(pipe);
 322                 aud_config = CPT_AUD_CFG(pipe);
 323                 aud_cntl_st = CPT_AUD_CNTL_ST(pipe);
 324                 aud_cntrl_st2 = CPT_AUD_CNTRL_ST2;
 325         }
 326
 327         if (WARN_ON(!port)) {
 328                 eldv = IBX_ELD_VALIDB;
 329                 eldv |= IBX_ELD_VALIDB << 4;
 330                 eldv |= IBX_ELD_VALIDB << 8;
 331         } else {
 332                 eldv = IBX_ELD_VALIDB << ((port - 1) * 4);
 333         }
 334
 335         /* Invalidate ELD */
 336         tmp = I915_READ(aud_cntrl_st2);
 337         tmp &= ~eldv;
 338         I915_WRITE(aud_cntrl_st2, tmp);
 339
 340         /* Reset ELD write address */
 341         tmp = I915_READ(aud_cntl_st);
 342         tmp &= ~IBX_ELD_ADDRESS_MASK;
 343         I915_WRITE(aud_cntl_st, tmp);
 344
 345         /* Up to 84 bytes of hw ELD buffer */
 346         len = min_t(int, eld[2], 21);
 347         for (i = 0; i < len; i++)
 348                 I915_WRITE(hdmiw_hdmiedid, *((uint32_t *)eld + i));
 349
 350         /* ELD valid */
 351         tmp = I915_READ(aud_cntrl_st2);
 352         tmp |= eldv;
 353         I915_WRITE(aud_cntrl_st2, tmp);
 354
 355         /* Enable timestamps */
 356         tmp = I915_READ(aud_config);
 357         tmp &= ~AUD_CONFIG_N_VALUE_INDEX;
 358         tmp &= ~AUD_CONFIG_N_PROG_ENABLE;
 359         tmp &= ~AUD_CONFIG_PIXEL_CLOCK_HDMI_MASK;
 360         if (intel_pipe_has_type(intel_crtc, INTEL_OUTPUT_DISPLAYPORT))
 361                 tmp |= AUD_CONFIG_N_VALUE_INDEX;
 362         else
 363                 tmp |= audio_config_hdmi_pixel_clock(mode);
 364         I915_WRITE(aud_config, tmp);
 365 }
 366
 367 /**
 368  * intel_audio_codec_enable - Enable the audio codec for HD audio
 369  * @intel_encoder: encoder on which to enable audio
 370  *
 371  * The enable sequences may only be performed after enabling the transcoder and
 372  * port, and after completed link training.
 373  */
 374 void intel_audio_codec_enable(struct intel_encoder *intel_encoder)
 375 {
 376         struct drm_encoder *encoder = &intel_encoder->base;
 377         struct intel_crtc *crtc = to_intel_crtc(encoder->crtc);
 378         struct drm_display_mode *mode = &crtc->config.adjusted_mode;
 379         struct drm_connector *connector;
 380         struct drm_device *dev = encoder->dev;
 381         struct drm_i915_private *dev_priv = dev->dev_private;
 382
 383         connector = drm_select_eld(encoder, mode);
 384         if (!connector)
 385                 return;
 386
 387         DRM_DEBUG_DRIVER("ELD on [CONNECTOR:%d:%s], [ENCODER:%d:%s]\n",
 388                          connector->base.id,
 389                          connector->name,
 390                          connector->encoder->base.id,
 391                          connector->encoder->name);
 392
 393         /* ELD Conn_Type */
 394         connector->eld[5] &= ~(3 << 2);
 395         if (intel_pipe_has_type(crtc, INTEL_OUTPUT_DISPLAYPORT))
 396                 connector->eld[5] |= (1 << 2);
 397
 398         connector->eld[6] = drm_av_sync_delay(connector, mode) / 2;
 399
 400         if (dev_priv->display.audio_codec_enable)
 401                 dev_priv->display.audio_codec_enable(connector, intel_encoder, mode);
 402 }
 403
 404 /**
 405  * intel_audio_codec_disable - Disable the audio codec for HD audio
 406  * @encoder: encoder on which to disable audio
 407  *
 408  * The disable sequences must be performed before disabling the transcoder or
 409  * port.
 410  */
 411 void intel_audio_codec_disable(struct intel_encoder *encoder)
 412 {
 413         struct drm_device *dev = encoder->base.dev;
 414         struct drm_i915_private *dev_priv = dev->dev_private;
 415
 416         if (dev_priv->display.audio_codec_disable)
 417                 dev_priv->display.audio_codec_disable(encoder);
 418 }
 419
 420 /**
 421  * intel_init_audio - Set up chip specific audio functions
 422  * @dev: drm device
 423  */
 424 void intel_init_audio(struct drm_device *dev)
 425 {
 426         struct drm_i915_private *dev_priv = dev->dev_private;
 427
 428         if (IS_G4X(dev)) {
 429                 dev_priv->display.audio_codec_enable = g4x_audio_codec_enable;
 430                 dev_priv->display.audio_codec_disable = g4x_audio_codec_disable;
 431         } else if (IS_VALLEYVIEW(dev)) {
 432                 dev_priv->display.audio_codec_enable = ilk_audio_codec_enable;
 433                 dev_priv->display.audio_codec_disable = ilk_audio_codec_disable;
 434         } else if (IS_HASWELL(dev) || INTEL_INFO(dev)->gen >= 8) {
 435                 dev_priv->display.audio_codec_enable = hsw_audio_codec_enable;
 436                 dev_priv->display.audio_codec_disable = hsw_audio_codec_disable;
 437         } else if (HAS_PCH_SPLIT(dev)) {
 438                 dev_priv->display.audio_codec_enable = ilk_audio_codec_enable;
 439                 dev_priv->display.audio_codec_disable = ilk_audio_codec_disable;
 440         }
 441 }