drivers/gpu/drm/i915/intel_hdmi.c

   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/i2c.h>
  30 #include <linux/slab.h>
  31 #include <linux/delay.h>
  32 #include "drmP.h"
  33 #include "drm.h"
  34 #include "drm_crtc.h"
  35 #include "drm_edid.h"
  36 #include "intel_drv.h"
  37 #include "i915_drm.h"
  38 #include "i915_drv.h"
  39
  40 struct intel_hdmi {
  41         struct intel_encoder base;
  42         u32 sdvox_reg;
  43         int ddc_bus;
  44         bool has_hdmi_sink;
  45         bool has_audio;
  46         int force_audio;
  47         struct drm_property *force_audio_property;
  48 };
  49
  50 static struct intel_hdmi *enc_to_intel_hdmi(struct drm_encoder *encoder)
  51 {
  52         return container_of(encoder, struct intel_hdmi, base.base);
  53 }
  54
  55 static struct intel_hdmi *intel_attached_hdmi(struct drm_connector *connector)
  56 {
  57         return container_of(intel_attached_encoder(connector),
  58                             struct intel_hdmi, base);
  59 }
  60
  61 void intel_dip_infoframe_csum(struct dip_infoframe *avi_if)
  62 {
  63         uint8_t *data = (uint8_t *)avi_if;
  64         uint8_t sum = 0;
  65         unsigned i;
  66
  67         avi_if->checksum = 0;
  68         avi_if->ecc = 0;
  69
  70         for (i = 0; i < sizeof(*avi_if); i++)
  71                 sum += data[i];
  72
  73         avi_if->checksum = 0x100 - sum;
  74 }
  75
  76 static void intel_hdmi_set_avi_infoframe(struct drm_encoder *encoder)
  77 {
  78         struct dip_infoframe avi_if = {
  79                 .type = DIP_TYPE_AVI,
  80                 .ver = DIP_VERSION_AVI,
  81                 .len = DIP_LEN_AVI,
  82         };
  83         uint32_t *data = (uint32_t *)&avi_if;
  84         struct drm_device *dev = encoder->dev;
  85         struct drm_i915_private *dev_priv = dev->dev_private;
  86         struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
  87         u32 port;
  88         unsigned i;
  89
  90         if (!intel_hdmi->has_hdmi_sink)
  91                 return;
  92
  93         /* XXX first guess at handling video port, is this corrent? */
  94         if (intel_hdmi->sdvox_reg == SDVOB)
  95                 port = VIDEO_DIP_PORT_B;
  96         else if (intel_hdmi->sdvox_reg == SDVOC)
  97                 port = VIDEO_DIP_PORT_C;
  98         else
  99                 return;
 100
 101         I915_WRITE(VIDEO_DIP_CTL, VIDEO_DIP_ENABLE | port |
 102                    VIDEO_DIP_SELECT_AVI | VIDEO_DIP_FREQ_VSYNC);
 103
 104         intel_dip_infoframe_csum(&avi_if);
 105         for (i = 0; i < sizeof(avi_if); i += 4) {
 106                 I915_WRITE(VIDEO_DIP_DATA, *data);
 107                 data++;
 108         }
 109
 110         I915_WRITE(VIDEO_DIP_CTL, VIDEO_DIP_ENABLE | port |
 111                    VIDEO_DIP_SELECT_AVI | VIDEO_DIP_FREQ_VSYNC |
 112                    VIDEO_DIP_ENABLE_AVI);
 113 }
 114
 115 static void intel_hdmi_mode_set(struct drm_encoder *encoder,
 116                                 struct drm_display_mode *mode,
 117                                 struct drm_display_mode *adjusted_mode)
 118 {
 119         struct drm_device *dev = encoder->dev;
 120         struct drm_i915_private *dev_priv = dev->dev_private;
 121         struct drm_crtc *crtc = encoder->crtc;
 122         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 123         struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
 124         u32 sdvox;
 125
 126         sdvox = SDVO_ENCODING_HDMI | SDVO_BORDER_ENABLE;
 127         if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
 128                 sdvox |= SDVO_VSYNC_ACTIVE_HIGH;
 129         if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
 130                 sdvox |= SDVO_HSYNC_ACTIVE_HIGH;
 131
 132         /* Required on CPT */
 133         if (intel_hdmi->has_hdmi_sink && HAS_PCH_CPT(dev))
 134                 sdvox |= HDMI_MODE_SELECT;
 135
 136         if (intel_hdmi->has_audio) {
 137                 sdvox |= SDVO_AUDIO_ENABLE;
 138                 sdvox |= SDVO_NULL_PACKETS_DURING_VSYNC;
 139         }
 140
 141         if (intel_crtc->pipe == 1) {
 142                 if (HAS_PCH_CPT(dev))
 143                         sdvox |= PORT_TRANS_B_SEL_CPT;
 144                 else
 145                         sdvox |= SDVO_PIPE_B_SELECT;
 146         }
 147
 148         I915_WRITE(intel_hdmi->sdvox_reg, sdvox);
 149         POSTING_READ(intel_hdmi->sdvox_reg);
 150
 151         intel_hdmi_set_avi_infoframe(encoder);
 152 }
 153
 154 static void intel_hdmi_dpms(struct drm_encoder *encoder, int mode)
 155 {
 156         struct drm_device *dev = encoder->dev;
 157         struct drm_i915_private *dev_priv = dev->dev_private;
 158         struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
 159         u32 temp;
 160
 161         temp = I915_READ(intel_hdmi->sdvox_reg);
 162
 163         /* HW workaround, need to toggle enable bit off and on for 12bpc, but
 164          * we do this anyway which shows more stable in testing.
 165          */
 166         if (HAS_PCH_SPLIT(dev)) {
 167                 I915_WRITE(intel_hdmi->sdvox_reg, temp & ~SDVO_ENABLE);
 168                 POSTING_READ(intel_hdmi->sdvox_reg);
 169         }
 170
 171         if (mode != DRM_MODE_DPMS_ON) {
 172                 temp &= ~SDVO_ENABLE;
 173         } else {
 174                 temp |= SDVO_ENABLE;
 175         }
 176
 177         I915_WRITE(intel_hdmi->sdvox_reg, temp);
 178         POSTING_READ(intel_hdmi->sdvox_reg);
 179
 180         /* HW workaround, need to write this twice for issue that may result
 181          * in first write getting masked.
 182          */
 183         if (HAS_PCH_SPLIT(dev)) {
 184                 I915_WRITE(intel_hdmi->sdvox_reg, temp);
 185                 POSTING_READ(intel_hdmi->sdvox_reg);
 186         }
 187 }
 188
 189 static int intel_hdmi_mode_valid(struct drm_connector *connector,
 190                                  struct drm_display_mode *mode)
 191 {
 192         if (mode->clock > 165000)
 193                 return MODE_CLOCK_HIGH;
 194         if (mode->clock < 20000)
 195                 return MODE_CLOCK_HIGH;
 196
 197         if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
 198                 return MODE_NO_DBLESCAN;
 199
 200         return MODE_OK;
 201 }
 202
 203 static bool intel_hdmi_mode_fixup(struct drm_encoder *encoder,
 204                                   struct drm_display_mode *mode,
 205                                   struct drm_display_mode *adjusted_mode)
 206 {
 207         return true;
 208 }
 209
 210 static enum drm_connector_status
 211 intel_hdmi_detect(struct drm_connector *connector, bool force)
 212 {
 213         struct intel_hdmi *intel_hdmi = intel_attached_hdmi(connector);
 214         struct drm_i915_private *dev_priv = connector->dev->dev_private;
 215         struct edid *edid;
 216         enum drm_connector_status status = connector_status_disconnected;
 217
 218         intel_hdmi->has_hdmi_sink = false;
 219         intel_hdmi->has_audio = false;
 220         edid = drm_get_edid(connector,
 221                             &dev_priv->gmbus[intel_hdmi->ddc_bus].adapter);
 222
 223         if (edid) {
 224                 if (edid->input & DRM_EDID_INPUT_DIGITAL) {
 225                         status = connector_status_connected;
 226                         intel_hdmi->has_hdmi_sink = drm_detect_hdmi_monitor(edid);
 227                         intel_hdmi->has_audio = drm_detect_monitor_audio(edid);
 228                 }
 229                 connector->display_info.raw_edid = NULL;
 230                 kfree(edid);
 231         }
 232
 233         if (status == connector_status_connected) {
 234                 if (intel_hdmi->force_audio)
 235                         intel_hdmi->has_audio = intel_hdmi->force_audio > 0;
 236         }
 237
 238         return status;
 239 }
 240
 241 static int intel_hdmi_get_modes(struct drm_connector *connector)
 242 {
 243         struct intel_hdmi *intel_hdmi = intel_attached_hdmi(connector);
 244         struct drm_i915_private *dev_priv = connector->dev->dev_private;
 245
 246         /* We should parse the EDID data and find out if it's an HDMI sink so
 247          * we can send audio to it.
 248          */
 249
 250         return intel_ddc_get_modes(connector,
 251                                    &dev_priv->gmbus[intel_hdmi->ddc_bus].adapter);
 252 }
 253
 254 static bool
 255 intel_hdmi_detect_audio(struct drm_connector *connector)
 256 {
 257         struct intel_hdmi *intel_hdmi = intel_attached_hdmi(connector);
 258         struct drm_i915_private *dev_priv = connector->dev->dev_private;
 259         struct edid *edid;
 260         bool has_audio = false;
 261
 262         edid = drm_get_edid(connector,
 263                             &dev_priv->gmbus[intel_hdmi->ddc_bus].adapter);
 264         if (edid) {
 265                 if (edid->input & DRM_EDID_INPUT_DIGITAL)
 266                         has_audio = drm_detect_monitor_audio(edid);
 267
 268                 connector->display_info.raw_edid = NULL;
 269                 kfree(edid);
 270         }
 271
 272         return has_audio;
 273 }
 274
 275 static int
 276 intel_hdmi_set_property(struct drm_connector *connector,
 277                       struct drm_property *property,
 278                       uint64_t val)
 279 {
 280         struct intel_hdmi *intel_hdmi = intel_attached_hdmi(connector);
 281         int ret;
 282
 283         ret = drm_connector_property_set_value(connector, property, val);
 284         if (ret)
 285                 return ret;
 286
 287         if (property == intel_hdmi->force_audio_property) {
 288                 int i = val;
 289                 bool has_audio;
 290
 291                 if (i == intel_hdmi->force_audio)
 292                         return 0;
 293
 294                 intel_hdmi->force_audio = i;
 295
 296                 if (i == 0)
 297                         has_audio = intel_hdmi_detect_audio(connector);
 298                 else
 299                         has_audio = i > 0;
 300
 301                 if (has_audio == intel_hdmi->has_audio)
 302                         return 0;
 303
 304                 intel_hdmi->has_audio = has_audio;
 305                 goto done;
 306         }
 307
 308         return -EINVAL;
 309
 310 done:
 311         if (intel_hdmi->base.base.crtc) {
 312                 struct drm_crtc *crtc = intel_hdmi->base.base.crtc;
 313                 drm_crtc_helper_set_mode(crtc, &crtc->mode,
 314                                          crtc->x, crtc->y,
 315                                          crtc->fb);
 316         }
 317
 318         return 0;
 319 }
 320
 321 static void intel_hdmi_destroy(struct drm_connector *connector)
 322 {
 323         drm_sysfs_connector_remove(connector);
 324         drm_connector_cleanup(connector);
 325         kfree(connector);
 326 }
 327
 328 static const struct drm_encoder_helper_funcs intel_hdmi_helper_funcs = {
 329         .dpms = intel_hdmi_dpms,
 330         .mode_fixup = intel_hdmi_mode_fixup,
 331         .prepare = intel_encoder_prepare,
 332         .mode_set = intel_hdmi_mode_set,
 333         .commit = intel_encoder_commit,
 334 };
 335
 336 static const struct drm_connector_funcs intel_hdmi_connector_funcs = {
 337         .dpms = drm_helper_connector_dpms,
 338         .detect = intel_hdmi_detect,
 339         .fill_modes = drm_helper_probe_single_connector_modes,
 340         .set_property = intel_hdmi_set_property,
 341         .destroy = intel_hdmi_destroy,
 342 };
 343
 344 static const struct drm_connector_helper_funcs intel_hdmi_connector_helper_funcs = {
 345         .get_modes = intel_hdmi_get_modes,
 346         .mode_valid = intel_hdmi_mode_valid,
 347         .best_encoder = intel_best_encoder,
 348 };
 349
 350 static const struct drm_encoder_funcs intel_hdmi_enc_funcs = {
 351         .destroy = intel_encoder_destroy,
 352 };
 353
 354 static void
 355 intel_hdmi_add_properties(struct intel_hdmi *intel_hdmi, struct drm_connector *connector)
 356 {
 357         struct drm_device *dev = connector->dev;
 358
 359         intel_hdmi->force_audio_property =
 360                 drm_property_create(dev, DRM_MODE_PROP_RANGE, "force_audio", 2);
 361         if (intel_hdmi->force_audio_property) {
 362                 intel_hdmi->force_audio_property->values[0] = -1;
 363                 intel_hdmi->force_audio_property->values[1] = 1;
 364                 drm_connector_attach_property(connector, intel_hdmi->force_audio_property, 0);
 365         }
 366 }
 367
 368 void intel_hdmi_init(struct drm_device *dev, int sdvox_reg)
 369 {
 370         struct drm_i915_private *dev_priv = dev->dev_private;
 371         struct drm_connector *connector;
 372         struct intel_encoder *intel_encoder;
 373         struct intel_connector *intel_connector;
 374         struct intel_hdmi *intel_hdmi;
 375
 376         intel_hdmi = kzalloc(sizeof(struct intel_hdmi), GFP_KERNEL);
 377         if (!intel_hdmi)
 378                 return;
 379
 380         intel_connector = kzalloc(sizeof(struct intel_connector), GFP_KERNEL);
 381         if (!intel_connector) {
 382                 kfree(intel_hdmi);
 383                 return;
 384         }
 385
 386         intel_encoder = &intel_hdmi->base;
 387         drm_encoder_init(dev, &intel_encoder->base, &intel_hdmi_enc_funcs,
 388                          DRM_MODE_ENCODER_TMDS);
 389
 390         connector = &intel_connector->base;
 391         drm_connector_init(dev, connector, &intel_hdmi_connector_funcs,
 392                            DRM_MODE_CONNECTOR_HDMIA);
 393         drm_connector_helper_add(connector, &intel_hdmi_connector_helper_funcs);
 394
 395         intel_encoder->type = INTEL_OUTPUT_HDMI;
 396
 397         connector->polled = DRM_CONNECTOR_POLL_HPD;
 398         connector->interlace_allowed = 0;
 399         connector->doublescan_allowed = 0;
 400         intel_encoder->crtc_mask = (1 << 0) | (1 << 1);
 401
 402         /* Set up the DDC bus. */
 403         if (sdvox_reg == SDVOB) {
 404                 intel_encoder->clone_mask = (1 << INTEL_HDMIB_CLONE_BIT);
 405                 intel_hdmi->ddc_bus = GMBUS_PORT_DPB;
 406                 dev_priv->hotplug_supported_mask |= HDMIB_HOTPLUG_INT_STATUS;
 407         } else if (sdvox_reg == SDVOC) {
 408                 intel_encoder->clone_mask = (1 << INTEL_HDMIC_CLONE_BIT);
 409                 intel_hdmi->ddc_bus = GMBUS_PORT_DPC;
 410                 dev_priv->hotplug_supported_mask |= HDMIC_HOTPLUG_INT_STATUS;
 411         } else if (sdvox_reg == HDMIB) {
 412                 intel_encoder->clone_mask = (1 << INTEL_HDMID_CLONE_BIT);
 413                 intel_hdmi->ddc_bus = GMBUS_PORT_DPB;
 414                 dev_priv->hotplug_supported_mask |= HDMIB_HOTPLUG_INT_STATUS;
 415         } else if (sdvox_reg == HDMIC) {
 416                 intel_encoder->clone_mask = (1 << INTEL_HDMIE_CLONE_BIT);
 417                 intel_hdmi->ddc_bus = GMBUS_PORT_DPC;
 418                 dev_priv->hotplug_supported_mask |= HDMIC_HOTPLUG_INT_STATUS;
 419         } else if (sdvox_reg == HDMID) {
 420                 intel_encoder->clone_mask = (1 << INTEL_HDMIF_CLONE_BIT);
 421                 intel_hdmi->ddc_bus = GMBUS_PORT_DPD;
 422                 dev_priv->hotplug_supported_mask |= HDMID_HOTPLUG_INT_STATUS;
 423         }
 424
 425         intel_hdmi->sdvox_reg = sdvox_reg;
 426
 427         drm_encoder_helper_add(&intel_encoder->base, &intel_hdmi_helper_funcs);
 428
 429         intel_hdmi_add_properties(intel_hdmi, connector);
 430
 431         intel_connector_attach_encoder(intel_connector, intel_encoder);
 432         drm_sysfs_connector_add(connector);
 433
 434         /* For G4X desktop chip, PEG_BAND_GAP_DATA 3:0 must first be written
 435          * 0xd.  Failure to do so will result in spurious interrupts being
 436          * generated on the port when a cable is not attached.
 437          */
 438         if (IS_G4X(dev) && !IS_GM45(dev)) {
 439                 u32 temp = I915_READ(PEG_BAND_GAP_DATA);
 440                 I915_WRITE(PEG_BAND_GAP_DATA, (temp & ~0xf) | 0xd);
 441         }
 442 }