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         struct drm_property *force_audio_property;
  49 };
  50
  51 static struct intel_hdmi *enc_to_intel_hdmi(struct drm_encoder *encoder)
  52 {
  53         return container_of(encoder, struct intel_hdmi, base.base);
  54 }
  55
  56 static struct intel_hdmi *intel_attached_hdmi(struct drm_connector *connector)
  57 {
  58         return container_of(intel_attached_encoder(connector),
  59                             struct intel_hdmi, base);
  60 }
  61
  62 void intel_dip_infoframe_csum(struct dip_infoframe *avi_if)
  63 {
  64         uint8_t *data = (uint8_t *)avi_if;
  65         uint8_t sum = 0;
  66         unsigned i;
  67
  68         avi_if->checksum = 0;
  69         avi_if->ecc = 0;
  70
  71         for (i = 0; i < sizeof(*avi_if); i++)
  72                 sum += data[i];
  73
  74         avi_if->checksum = 0x100 - sum;
  75 }
  76
  77 static void intel_hdmi_set_avi_infoframe(struct drm_encoder *encoder)
  78 {
  79         struct dip_infoframe avi_if = {
  80                 .type = DIP_TYPE_AVI,
  81                 .ver = DIP_VERSION_AVI,
  82                 .len = DIP_LEN_AVI,
  83         };
  84         uint32_t *data = (uint32_t *)&avi_if;
  85         struct drm_device *dev = encoder->dev;
  86         struct drm_i915_private *dev_priv = dev->dev_private;
  87         struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
  88         u32 port;
  89         unsigned i;
  90
  91         if (!intel_hdmi->has_hdmi_sink)
  92                 return;
  93
  94         /* XXX first guess at handling video port, is this corrent? */
  95         if (intel_hdmi->sdvox_reg == SDVOB)
  96                 port = VIDEO_DIP_PORT_B;
  97         else if (intel_hdmi->sdvox_reg == SDVOC)
  98                 port = VIDEO_DIP_PORT_C;
  99         else
 100                 return;
 101
 102         I915_WRITE(VIDEO_DIP_CTL, VIDEO_DIP_ENABLE | port |
 103                    VIDEO_DIP_SELECT_AVI | VIDEO_DIP_FREQ_VSYNC);
 104
 105         intel_dip_infoframe_csum(&avi_if);
 106         for (i = 0; i < sizeof(avi_if); i += 4) {
 107                 I915_WRITE(VIDEO_DIP_DATA, *data);
 108                 data++;
 109         }
 110
 111         I915_WRITE(VIDEO_DIP_CTL, VIDEO_DIP_ENABLE | port |
 112                    VIDEO_DIP_SELECT_AVI | VIDEO_DIP_FREQ_VSYNC |
 113                    VIDEO_DIP_ENABLE_AVI);
 114 }
 115
 116 static void intel_hdmi_mode_set(struct drm_encoder *encoder,
 117                                 struct drm_display_mode *mode,
 118                                 struct drm_display_mode *adjusted_mode)
 119 {
 120         struct drm_device *dev = encoder->dev;
 121         struct drm_i915_private *dev_priv = dev->dev_private;
 122         struct drm_crtc *crtc = encoder->crtc;
 123         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 124         struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
 125         u32 sdvox;
 126
 127         sdvox = SDVO_ENCODING_HDMI | SDVO_BORDER_ENABLE;
 128         sdvox |= intel_hdmi->color_range;
 129         if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
 130                 sdvox |= SDVO_VSYNC_ACTIVE_HIGH;
 131         if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
 132                 sdvox |= SDVO_HSYNC_ACTIVE_HIGH;
 133
 134         /* Required on CPT */
 135         if (intel_hdmi->has_hdmi_sink && HAS_PCH_CPT(dev))
 136                 sdvox |= HDMI_MODE_SELECT;
 137
 138         if (intel_hdmi->has_audio) {
 139                 sdvox |= SDVO_AUDIO_ENABLE;
 140                 sdvox |= SDVO_NULL_PACKETS_DURING_VSYNC;
 141         }
 142
 143         if (intel_crtc->pipe == 1) {
 144                 if (HAS_PCH_CPT(dev))
 145                         sdvox |= PORT_TRANS_B_SEL_CPT;
 146                 else
 147                         sdvox |= SDVO_PIPE_B_SELECT;
 148         }
 149
 150         I915_WRITE(intel_hdmi->sdvox_reg, sdvox);
 151         POSTING_READ(intel_hdmi->sdvox_reg);
 152
 153         intel_hdmi_set_avi_infoframe(encoder);
 154 }
 155
 156 static void intel_hdmi_dpms(struct drm_encoder *encoder, int mode)
 157 {
 158         struct drm_device *dev = encoder->dev;
 159         struct drm_i915_private *dev_priv = dev->dev_private;
 160         struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
 161         u32 temp;
 162
 163         temp = I915_READ(intel_hdmi->sdvox_reg);
 164
 165         /* HW workaround, need to toggle enable bit off and on for 12bpc, but
 166          * we do this anyway which shows more stable in testing.
 167          */
 168         if (HAS_PCH_SPLIT(dev)) {
 169                 I915_WRITE(intel_hdmi->sdvox_reg, temp & ~SDVO_ENABLE);
 170                 POSTING_READ(intel_hdmi->sdvox_reg);
 171         }
 172
 173         if (mode != DRM_MODE_DPMS_ON) {
 174                 temp &= ~SDVO_ENABLE;
 175         } else {
 176                 temp |= SDVO_ENABLE;
 177         }
 178
 179         I915_WRITE(intel_hdmi->sdvox_reg, temp);
 180         POSTING_READ(intel_hdmi->sdvox_reg);
 181
 182         /* HW workaround, need to write this twice for issue that may result
 183          * in first write getting masked.
 184          */
 185         if (HAS_PCH_SPLIT(dev)) {
 186                 I915_WRITE(intel_hdmi->sdvox_reg, temp);
 187                 POSTING_READ(intel_hdmi->sdvox_reg);
 188         }
 189 }
 190
 191 static int intel_hdmi_mode_valid(struct drm_connector *connector,
 192                                  struct drm_display_mode *mode)
 193 {
 194         if (mode->clock > 165000)
 195                 return MODE_CLOCK_HIGH;
 196         if (mode->clock < 20000)
 197                 return MODE_CLOCK_HIGH;
 198
 199         if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
 200                 return MODE_NO_DBLESCAN;
 201
 202         return MODE_OK;
 203 }
 204
 205 static bool intel_hdmi_mode_fixup(struct drm_encoder *encoder,
 206                                   struct drm_display_mode *mode,
 207                                   struct drm_display_mode *adjusted_mode)
 208 {
 209         return true;
 210 }
 211
 212 static enum drm_connector_status
 213 intel_hdmi_detect(struct drm_connector *connector, bool force)
 214 {
 215         struct intel_hdmi *intel_hdmi = intel_attached_hdmi(connector);
 216         struct drm_i915_private *dev_priv = connector->dev->dev_private;
 217         struct edid *edid;
 218         enum drm_connector_status status = connector_status_disconnected;
 219
 220         intel_hdmi->has_hdmi_sink = false;
 221         intel_hdmi->has_audio = false;
 222         edid = drm_get_edid(connector,
 223                             &dev_priv->gmbus[intel_hdmi->ddc_bus].adapter);
 224
 225         if (edid) {
 226                 if (edid->input & DRM_EDID_INPUT_DIGITAL) {
 227                         status = connector_status_connected;
 228                         intel_hdmi->has_hdmi_sink = drm_detect_hdmi_monitor(edid);
 229                         intel_hdmi->has_audio = drm_detect_monitor_audio(edid);
 230                 }
 231                 connector->display_info.raw_edid = NULL;
 232                 kfree(edid);
 233         }
 234
 235         if (status == connector_status_connected) {
 236                 if (intel_hdmi->force_audio)
 237                         intel_hdmi->has_audio = intel_hdmi->force_audio > 0;
 238         }
 239
 240         return status;
 241 }
 242
 243 static int intel_hdmi_get_modes(struct drm_connector *connector)
 244 {
 245         struct intel_hdmi *intel_hdmi = intel_attached_hdmi(connector);
 246         struct drm_i915_private *dev_priv = connector->dev->dev_private;
 247
 248         /* We should parse the EDID data and find out if it's an HDMI sink so
 249          * we can send audio to it.
 250          */
 251
 252         return intel_ddc_get_modes(connector,
 253                                    &dev_priv->gmbus[intel_hdmi->ddc_bus].adapter);
 254 }
 255
 256 static bool
 257 intel_hdmi_detect_audio(struct drm_connector *connector)
 258 {
 259         struct intel_hdmi *intel_hdmi = intel_attached_hdmi(connector);
 260         struct drm_i915_private *dev_priv = connector->dev->dev_private;
 261         struct edid *edid;
 262         bool has_audio = false;
 263
 264         edid = drm_get_edid(connector,
 265                             &dev_priv->gmbus[intel_hdmi->ddc_bus].adapter);
 266         if (edid) {
 267                 if (edid->input & DRM_EDID_INPUT_DIGITAL)
 268                         has_audio = drm_detect_monitor_audio(edid);
 269
 270                 connector->display_info.raw_edid = NULL;
 271                 kfree(edid);
 272         }
 273
 274         return has_audio;
 275 }
 276
 277 static int
 278 intel_hdmi_set_property(struct drm_connector *connector,
 279                       struct drm_property *property,
 280                       uint64_t val)
 281 {
 282         struct intel_hdmi *intel_hdmi = intel_attached_hdmi(connector);
 283         struct drm_i915_private *dev_priv = connector->dev->dev_private;
 284         int ret;
 285
 286         ret = drm_connector_property_set_value(connector, property, val);
 287         if (ret)
 288                 return ret;
 289
 290         if (property == intel_hdmi->force_audio_property) {
 291                 int i = val;
 292                 bool has_audio;
 293
 294                 if (i == intel_hdmi->force_audio)
 295                         return 0;
 296
 297                 intel_hdmi->force_audio = i;
 298
 299                 if (i == 0)
 300                         has_audio = intel_hdmi_detect_audio(connector);
 301                 else
 302                         has_audio = i > 0;
 303
 304                 if (has_audio == intel_hdmi->has_audio)
 305                         return 0;
 306
 307                 intel_hdmi->has_audio = has_audio;
 308                 goto done;
 309         }
 310
 311         if (property == dev_priv->broadcast_rgb_property) {
 312                 if (val == !!intel_hdmi->color_range)
 313                         return 0;
 314
 315                 intel_hdmi->color_range = val ? SDVO_COLOR_RANGE_16_235 : 0;
 316                 goto done;
 317         }
 318
 319         return -EINVAL;
 320
 321 done:
 322         if (intel_hdmi->base.base.crtc) {
 323                 struct drm_crtc *crtc = intel_hdmi->base.base.crtc;
 324                 drm_crtc_helper_set_mode(crtc, &crtc->mode,
 325                                          crtc->x, crtc->y,
 326                                          crtc->fb);
 327         }
 328
 329         return 0;
 330 }
 331
 332 static void intel_hdmi_destroy(struct drm_connector *connector)
 333 {
 334         drm_sysfs_connector_remove(connector);
 335         drm_connector_cleanup(connector);
 336         kfree(connector);
 337 }
 338
 339 static const struct drm_encoder_helper_funcs intel_hdmi_helper_funcs = {
 340         .dpms = intel_hdmi_dpms,
 341         .mode_fixup = intel_hdmi_mode_fixup,
 342         .prepare = intel_encoder_prepare,
 343         .mode_set = intel_hdmi_mode_set,
 344         .commit = intel_encoder_commit,
 345 };
 346
 347 static const struct drm_connector_funcs intel_hdmi_connector_funcs = {
 348         .dpms = drm_helper_connector_dpms,
 349         .detect = intel_hdmi_detect,
 350         .fill_modes = drm_helper_probe_single_connector_modes,
 351         .set_property = intel_hdmi_set_property,
 352         .destroy = intel_hdmi_destroy,
 353 };
 354
 355 static const struct drm_connector_helper_funcs intel_hdmi_connector_helper_funcs = {
 356         .get_modes = intel_hdmi_get_modes,
 357         .mode_valid = intel_hdmi_mode_valid,
 358         .best_encoder = intel_best_encoder,
 359 };
 360
 361 static const struct drm_encoder_funcs intel_hdmi_enc_funcs = {
 362         .destroy = intel_encoder_destroy,
 363 };
 364
 365 static void
 366 intel_hdmi_add_properties(struct intel_hdmi *intel_hdmi, struct drm_connector *connector)
 367 {
 368         struct drm_device *dev = connector->dev;
 369
 370         intel_hdmi->force_audio_property =
 371                 drm_property_create(dev, DRM_MODE_PROP_RANGE, "force_audio", 2);
 372         if (intel_hdmi->force_audio_property) {
 373                 intel_hdmi->force_audio_property->values[0] = -1;
 374                 intel_hdmi->force_audio_property->values[1] = 1;
 375                 drm_connector_attach_property(connector, intel_hdmi->force_audio_property, 0);
 376         }
 377
 378         intel_attach_broadcast_rgb_property(connector);
 379 }
 380
 381 void intel_hdmi_init(struct drm_device *dev, int sdvox_reg)
 382 {
 383         struct drm_i915_private *dev_priv = dev->dev_private;
 384         struct drm_connector *connector;
 385         struct intel_encoder *intel_encoder;
 386         struct intel_connector *intel_connector;
 387         struct intel_hdmi *intel_hdmi;
 388
 389         intel_hdmi = kzalloc(sizeof(struct intel_hdmi), GFP_KERNEL);
 390         if (!intel_hdmi)
 391                 return;
 392
 393         intel_connector = kzalloc(sizeof(struct intel_connector), GFP_KERNEL);
 394         if (!intel_connector) {
 395                 kfree(intel_hdmi);
 396                 return;
 397         }
 398
 399         intel_encoder = &intel_hdmi->base;
 400         drm_encoder_init(dev, &intel_encoder->base, &intel_hdmi_enc_funcs,
 401                          DRM_MODE_ENCODER_TMDS);
 402
 403         connector = &intel_connector->base;
 404         drm_connector_init(dev, connector, &intel_hdmi_connector_funcs,
 405                            DRM_MODE_CONNECTOR_HDMIA);
 406         drm_connector_helper_add(connector, &intel_hdmi_connector_helper_funcs);
 407
 408         intel_encoder->type = INTEL_OUTPUT_HDMI;
 409
 410         connector->polled = DRM_CONNECTOR_POLL_HPD;
 411         connector->interlace_allowed = 0;
 412         connector->doublescan_allowed = 0;
 413         intel_encoder->crtc_mask = (1 << 0) | (1 << 1);
 414
 415         /* Set up the DDC bus. */
 416         if (sdvox_reg == SDVOB) {
 417                 intel_encoder->clone_mask = (1 << INTEL_HDMIB_CLONE_BIT);
 418                 intel_hdmi->ddc_bus = GMBUS_PORT_DPB;
 419                 dev_priv->hotplug_supported_mask |= HDMIB_HOTPLUG_INT_STATUS;
 420         } else if (sdvox_reg == SDVOC) {
 421                 intel_encoder->clone_mask = (1 << INTEL_HDMIC_CLONE_BIT);
 422                 intel_hdmi->ddc_bus = GMBUS_PORT_DPC;
 423                 dev_priv->hotplug_supported_mask |= HDMIC_HOTPLUG_INT_STATUS;
 424         } else if (sdvox_reg == HDMIB) {
 425                 intel_encoder->clone_mask = (1 << INTEL_HDMID_CLONE_BIT);
 426                 intel_hdmi->ddc_bus = GMBUS_PORT_DPB;
 427                 dev_priv->hotplug_supported_mask |= HDMIB_HOTPLUG_INT_STATUS;
 428         } else if (sdvox_reg == HDMIC) {
 429                 intel_encoder->clone_mask = (1 << INTEL_HDMIE_CLONE_BIT);
 430                 intel_hdmi->ddc_bus = GMBUS_PORT_DPC;
 431                 dev_priv->hotplug_supported_mask |= HDMIC_HOTPLUG_INT_STATUS;
 432         } else if (sdvox_reg == HDMID) {
 433                 intel_encoder->clone_mask = (1 << INTEL_HDMIF_CLONE_BIT);
 434                 intel_hdmi->ddc_bus = GMBUS_PORT_DPD;
 435                 dev_priv->hotplug_supported_mask |= HDMID_HOTPLUG_INT_STATUS;
 436         }
 437
 438         intel_hdmi->sdvox_reg = sdvox_reg;
 439
 440         drm_encoder_helper_add(&intel_encoder->base, &intel_hdmi_helper_funcs);
 441
 442         intel_hdmi_add_properties(intel_hdmi, connector);
 443
 444         intel_connector_attach_encoder(intel_connector, intel_encoder);
 445         drm_sysfs_connector_add(connector);
 446
 447         /* For G4X desktop chip, PEG_BAND_GAP_DATA 3:0 must first be written
 448          * 0xd.  Failure to do so will result in spurious interrupts being
 449          * generated on the port when a cable is not attached.
 450          */
 451         if (IS_G4X(dev) && !IS_GM45(dev)) {
 452                 u32 temp = I915_READ(PEG_BAND_GAP_DATA);
 453                 I915_WRITE(PEG_BAND_GAP_DATA, (temp & ~0xf) | 0xd);
 454         }
 455 }