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         uint32_t color_range;
  45         bool has_hdmi_sink;
  46         bool has_audio;
  47         int force_audio;
  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         sdvox |= intel_hdmi->color_range;
 128         if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
 129                 sdvox |= SDVO_VSYNC_ACTIVE_HIGH;
 130         if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
 131                 sdvox |= SDVO_HSYNC_ACTIVE_HIGH;
 132
 133         /* Required on CPT */
 134         if (intel_hdmi->has_hdmi_sink && HAS_PCH_CPT(dev))
 135                 sdvox |= HDMI_MODE_SELECT;
 136
 137         if (intel_hdmi->has_audio) {
 138                 sdvox |= SDVO_AUDIO_ENABLE;
 139                 sdvox |= SDVO_NULL_PACKETS_DURING_VSYNC;
 140         }
 141
 142         if (intel_crtc->pipe == 1) {
 143                 if (HAS_PCH_CPT(dev))
 144                         sdvox |= PORT_TRANS_B_SEL_CPT;
 145                 else
 146                         sdvox |= SDVO_PIPE_B_SELECT;
 147         }
 148
 149         I915_WRITE(intel_hdmi->sdvox_reg, sdvox);
 150         POSTING_READ(intel_hdmi->sdvox_reg);
 151
 152         intel_hdmi_set_avi_infoframe(encoder);
 153 }
 154
 155 static void intel_hdmi_dpms(struct drm_encoder *encoder, int mode)
 156 {
 157         struct drm_device *dev = encoder->dev;
 158         struct drm_i915_private *dev_priv = dev->dev_private;
 159         struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
 160         u32 temp;
 161
 162         temp = I915_READ(intel_hdmi->sdvox_reg);
 163
 164         /* HW workaround, need to toggle enable bit off and on for 12bpc, but
 165          * we do this anyway which shows more stable in testing.
 166          */
 167         if (HAS_PCH_SPLIT(dev)) {
 168                 I915_WRITE(intel_hdmi->sdvox_reg, temp & ~SDVO_ENABLE);
 169                 POSTING_READ(intel_hdmi->sdvox_reg);
 170         }
 171
 172         if (mode != DRM_MODE_DPMS_ON) {
 173                 temp &= ~SDVO_ENABLE;
 174         } else {
 175                 temp |= SDVO_ENABLE;
 176         }
 177
 178         I915_WRITE(intel_hdmi->sdvox_reg, temp);
 179         POSTING_READ(intel_hdmi->sdvox_reg);
 180
 181         /* HW workaround, need to write this twice for issue that may result
 182          * in first write getting masked.
 183          */
 184         if (HAS_PCH_SPLIT(dev)) {
 185                 I915_WRITE(intel_hdmi->sdvox_reg, temp);
 186                 POSTING_READ(intel_hdmi->sdvox_reg);
 187         }
 188 }
 189
 190 static int intel_hdmi_mode_valid(struct drm_connector *connector,
 191                                  struct drm_display_mode *mode)
 192 {
 193         if (mode->clock > 165000)
 194                 return MODE_CLOCK_HIGH;
 195         if (mode->clock < 20000)
 196                 return MODE_CLOCK_LOW;
 197
 198         if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
 199                 return MODE_NO_DBLESCAN;
 200
 201         return MODE_OK;
 202 }
 203
 204 static bool intel_hdmi_mode_fixup(struct drm_encoder *encoder,
 205                                   struct drm_display_mode *mode,
 206                                   struct drm_display_mode *adjusted_mode)
 207 {
 208         return true;
 209 }
 210
 211 static enum drm_connector_status
 212 intel_hdmi_detect(struct drm_connector *connector, bool force)
 213 {
 214         struct intel_hdmi *intel_hdmi = intel_attached_hdmi(connector);
 215         struct drm_i915_private *dev_priv = connector->dev->dev_private;
 216         struct edid *edid;
 217         enum drm_connector_status status = connector_status_disconnected;
 218
 219         intel_hdmi->has_hdmi_sink = false;
 220         intel_hdmi->has_audio = false;
 221         edid = drm_get_edid(connector,
 222                             &dev_priv->gmbus[intel_hdmi->ddc_bus].adapter);
 223
 224         if (edid) {
 225                 if (edid->input & DRM_EDID_INPUT_DIGITAL) {
 226                         status = connector_status_connected;
 227                         intel_hdmi->has_hdmi_sink = drm_detect_hdmi_monitor(edid);
 228                         intel_hdmi->has_audio = drm_detect_monitor_audio(edid);
 229                 }
 230                 connector->display_info.raw_edid = NULL;
 231                 kfree(edid);
 232         }
 233
 234         if (status == connector_status_connected) {
 235                 if (intel_hdmi->force_audio)
 236                         intel_hdmi->has_audio = intel_hdmi->force_audio > 0;
 237         }
 238
 239         return status;
 240 }
 241
 242 static int intel_hdmi_get_modes(struct drm_connector *connector)
 243 {
 244         struct intel_hdmi *intel_hdmi = intel_attached_hdmi(connector);
 245         struct drm_i915_private *dev_priv = connector->dev->dev_private;
 246
 247         /* We should parse the EDID data and find out if it's an HDMI sink so
 248          * we can send audio to it.
 249          */
 250
 251         return intel_ddc_get_modes(connector,
 252                                    &dev_priv->gmbus[intel_hdmi->ddc_bus].adapter);
 253 }
 254
 255 static bool
 256 intel_hdmi_detect_audio(struct drm_connector *connector)
 257 {
 258         struct intel_hdmi *intel_hdmi = intel_attached_hdmi(connector);
 259         struct drm_i915_private *dev_priv = connector->dev->dev_private;
 260         struct edid *edid;
 261         bool has_audio = false;
 262
 263         edid = drm_get_edid(connector,
 264                             &dev_priv->gmbus[intel_hdmi->ddc_bus].adapter);
 265         if (edid) {
 266                 if (edid->input & DRM_EDID_INPUT_DIGITAL)
 267                         has_audio = drm_detect_monitor_audio(edid);
 268
 269                 connector->display_info.raw_edid = NULL;
 270                 kfree(edid);
 271         }
 272
 273         return has_audio;
 274 }
 275
 276 static int
 277 intel_hdmi_set_property(struct drm_connector *connector,
 278                       struct drm_property *property,
 279                       uint64_t val)
 280 {
 281         struct intel_hdmi *intel_hdmi = intel_attached_hdmi(connector);
 282         struct drm_i915_private *dev_priv = connector->dev->dev_private;
 283         int ret;
 284
 285         ret = drm_connector_property_set_value(connector, property, val);
 286         if (ret)
 287                 return ret;
 288
 289         if (property == dev_priv->force_audio_property) {
 290                 int i = val;
 291                 bool has_audio;
 292
 293                 if (i == intel_hdmi->force_audio)
 294                         return 0;
 295
 296                 intel_hdmi->force_audio = i;
 297
 298                 if (i == 0)
 299                         has_audio = intel_hdmi_detect_audio(connector);
 300                 else
 301                         has_audio = i > 0;
 302
 303                 if (has_audio == intel_hdmi->has_audio)
 304                         return 0;
 305
 306                 intel_hdmi->has_audio = has_audio;
 307                 goto done;
 308         }
 309
 310         if (property == dev_priv->broadcast_rgb_property) {
 311                 if (val == !!intel_hdmi->color_range)
 312                         return 0;
 313
 314                 intel_hdmi->color_range = val ? SDVO_COLOR_RANGE_16_235 : 0;
 315                 goto done;
 316         }
 317
 318         return -EINVAL;
 319
 320 done:
 321         if (intel_hdmi->base.base.crtc) {
 322                 struct drm_crtc *crtc = intel_hdmi->base.base.crtc;
 323                 drm_crtc_helper_set_mode(crtc, &crtc->mode,
 324                                          crtc->x, crtc->y,
 325                                          crtc->fb);
 326         }
 327
 328         return 0;
 329 }
 330
 331 static void intel_hdmi_destroy(struct drm_connector *connector)
 332 {
 333         drm_sysfs_connector_remove(connector);
 334         drm_connector_cleanup(connector);
 335         kfree(connector);
 336 }
 337
 338 static const struct drm_encoder_helper_funcs intel_hdmi_helper_funcs = {
 339         .dpms = intel_hdmi_dpms,
 340         .mode_fixup = intel_hdmi_mode_fixup,
 341         .prepare = intel_encoder_prepare,
 342         .mode_set = intel_hdmi_mode_set,
 343         .commit = intel_encoder_commit,
 344 };
 345
 346 static const struct drm_connector_funcs intel_hdmi_connector_funcs = {
 347         .dpms = drm_helper_connector_dpms,
 348         .detect = intel_hdmi_detect,
 349         .fill_modes = drm_helper_probe_single_connector_modes,
 350         .set_property = intel_hdmi_set_property,
 351         .destroy = intel_hdmi_destroy,
 352 };
 353
 354 static const struct drm_connector_helper_funcs intel_hdmi_connector_helper_funcs = {
 355         .get_modes = intel_hdmi_get_modes,
 356         .mode_valid = intel_hdmi_mode_valid,
 357         .best_encoder = intel_best_encoder,
 358 };
 359
 360 static const struct drm_encoder_funcs intel_hdmi_enc_funcs = {
 361         .destroy = intel_encoder_destroy,
 362 };
 363
 364 static void
 365 intel_hdmi_add_properties(struct intel_hdmi *intel_hdmi, struct drm_connector *connector)
 366 {
 367         intel_attach_force_audio_property(connector);
 368         intel_attach_broadcast_rgb_property(connector);
 369 }
 370
 371 void intel_hdmi_init(struct drm_device *dev, int sdvox_reg)
 372 {
 373         struct drm_i915_private *dev_priv = dev->dev_private;
 374         struct drm_connector *connector;
 375         struct intel_encoder *intel_encoder;
 376         struct intel_connector *intel_connector;
 377         struct intel_hdmi *intel_hdmi;
 378
 379         intel_hdmi = kzalloc(sizeof(struct intel_hdmi), GFP_KERNEL);
 380         if (!intel_hdmi)
 381                 return;
 382
 383         intel_connector = kzalloc(sizeof(struct intel_connector), GFP_KERNEL);
 384         if (!intel_connector) {
 385                 kfree(intel_hdmi);
 386                 return;
 387         }
 388
 389         intel_encoder = &intel_hdmi->base;
 390         drm_encoder_init(dev, &intel_encoder->base, &intel_hdmi_enc_funcs,
 391                          DRM_MODE_ENCODER_TMDS);
 392
 393         connector = &intel_connector->base;
 394         drm_connector_init(dev, connector, &intel_hdmi_connector_funcs,
 395                            DRM_MODE_CONNECTOR_HDMIA);
 396         drm_connector_helper_add(connector, &intel_hdmi_connector_helper_funcs);
 397
 398         intel_encoder->type = INTEL_OUTPUT_HDMI;
 399
 400         connector->polled = DRM_CONNECTOR_POLL_HPD;
 401         connector->interlace_allowed = 0;
 402         connector->doublescan_allowed = 0;
 403         intel_encoder->crtc_mask = (1 << 0) | (1 << 1);
 404
 405         /* Set up the DDC bus. */
 406         if (sdvox_reg == SDVOB) {
 407                 intel_encoder->clone_mask = (1 << INTEL_HDMIB_CLONE_BIT);
 408                 intel_hdmi->ddc_bus = GMBUS_PORT_DPB;
 409                 dev_priv->hotplug_supported_mask |= HDMIB_HOTPLUG_INT_STATUS;
 410         } else if (sdvox_reg == SDVOC) {
 411                 intel_encoder->clone_mask = (1 << INTEL_HDMIC_CLONE_BIT);
 412                 intel_hdmi->ddc_bus = GMBUS_PORT_DPC;
 413                 dev_priv->hotplug_supported_mask |= HDMIC_HOTPLUG_INT_STATUS;
 414         } else if (sdvox_reg == HDMIB) {
 415                 intel_encoder->clone_mask = (1 << INTEL_HDMID_CLONE_BIT);
 416                 intel_hdmi->ddc_bus = GMBUS_PORT_DPB;
 417                 dev_priv->hotplug_supported_mask |= HDMIB_HOTPLUG_INT_STATUS;
 418         } else if (sdvox_reg == HDMIC) {
 419                 intel_encoder->clone_mask = (1 << INTEL_HDMIE_CLONE_BIT);
 420                 intel_hdmi->ddc_bus = GMBUS_PORT_DPC;
 421                 dev_priv->hotplug_supported_mask |= HDMIC_HOTPLUG_INT_STATUS;
 422         } else if (sdvox_reg == HDMID) {
 423                 intel_encoder->clone_mask = (1 << INTEL_HDMIF_CLONE_BIT);
 424                 intel_hdmi->ddc_bus = GMBUS_PORT_DPD;
 425                 dev_priv->hotplug_supported_mask |= HDMID_HOTPLUG_INT_STATUS;
 426         }
 427
 428         intel_hdmi->sdvox_reg = sdvox_reg;
 429
 430         drm_encoder_helper_add(&intel_encoder->base, &intel_hdmi_helper_funcs);
 431
 432         intel_hdmi_add_properties(intel_hdmi, connector);
 433
 434         intel_connector_attach_encoder(intel_connector, intel_encoder);
 435         drm_sysfs_connector_add(connector);
 436
 437         /* For G4X desktop chip, PEG_BAND_GAP_DATA 3:0 must first be written
 438          * 0xd.  Failure to do so will result in spurious interrupts being
 439          * generated on the port when a cable is not attached.
 440          */
 441         if (IS_G4X(dev) && !IS_GM45(dev)) {
 442                 u32 temp = I915_READ(PEG_BAND_GAP_DATA);
 443                 I915_WRITE(PEG_BAND_GAP_DATA, (temp & ~0xf) | 0xd);
 444         }
 445 }