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 int
 255 intel_hdmi_set_property(struct drm_connector *connector,
 256                       struct drm_property *property,
 257                       uint64_t val)
 258 {
 259         struct intel_hdmi *intel_hdmi = intel_attached_hdmi(connector);
 260         int ret;
 261
 262         ret = drm_connector_property_set_value(connector, property, val);
 263         if (ret)
 264                 return ret;
 265
 266         if (property == intel_hdmi->force_audio_property) {
 267                 if (val == intel_hdmi->force_audio)
 268                         return 0;
 269
 270                 intel_hdmi->force_audio = val;
 271
 272                 if (val > 0 && intel_hdmi->has_audio)
 273                         return 0;
 274                 if (val < 0 && !intel_hdmi->has_audio)
 275                         return 0;
 276
 277                 intel_hdmi->has_audio = val > 0;
 278                 goto done;
 279         }
 280
 281         return -EINVAL;
 282
 283 done:
 284         if (intel_hdmi->base.base.crtc) {
 285                 struct drm_crtc *crtc = intel_hdmi->base.base.crtc;
 286                 drm_crtc_helper_set_mode(crtc, &crtc->mode,
 287                                          crtc->x, crtc->y,
 288                                          crtc->fb);
 289         }
 290
 291         return 0;
 292 }
 293
 294 static void intel_hdmi_destroy(struct drm_connector *connector)
 295 {
 296         drm_sysfs_connector_remove(connector);
 297         drm_connector_cleanup(connector);
 298         kfree(connector);
 299 }
 300
 301 static const struct drm_encoder_helper_funcs intel_hdmi_helper_funcs = {
 302         .dpms = intel_hdmi_dpms,
 303         .mode_fixup = intel_hdmi_mode_fixup,
 304         .prepare = intel_encoder_prepare,
 305         .mode_set = intel_hdmi_mode_set,
 306         .commit = intel_encoder_commit,
 307 };
 308
 309 static const struct drm_connector_funcs intel_hdmi_connector_funcs = {
 310         .dpms = drm_helper_connector_dpms,
 311         .detect = intel_hdmi_detect,
 312         .fill_modes = drm_helper_probe_single_connector_modes,
 313         .set_property = intel_hdmi_set_property,
 314         .destroy = intel_hdmi_destroy,
 315 };
 316
 317 static const struct drm_connector_helper_funcs intel_hdmi_connector_helper_funcs = {
 318         .get_modes = intel_hdmi_get_modes,
 319         .mode_valid = intel_hdmi_mode_valid,
 320         .best_encoder = intel_best_encoder,
 321 };
 322
 323 static const struct drm_encoder_funcs intel_hdmi_enc_funcs = {
 324         .destroy = intel_encoder_destroy,
 325 };
 326
 327 static void
 328 intel_hdmi_add_properties(struct intel_hdmi *intel_hdmi, struct drm_connector *connector)
 329 {
 330         struct drm_device *dev = connector->dev;
 331
 332         intel_hdmi->force_audio_property =
 333                 drm_property_create(dev, DRM_MODE_PROP_RANGE, "force_audio", 2);
 334         if (intel_hdmi->force_audio_property) {
 335                 intel_hdmi->force_audio_property->values[0] = -1;
 336                 intel_hdmi->force_audio_property->values[1] = 1;
 337                 drm_connector_attach_property(connector, intel_hdmi->force_audio_property, 0);
 338         }
 339 }
 340
 341 void intel_hdmi_init(struct drm_device *dev, int sdvox_reg)
 342 {
 343         struct drm_i915_private *dev_priv = dev->dev_private;
 344         struct drm_connector *connector;
 345         struct intel_encoder *intel_encoder;
 346         struct intel_connector *intel_connector;
 347         struct intel_hdmi *intel_hdmi;
 348
 349         intel_hdmi = kzalloc(sizeof(struct intel_hdmi), GFP_KERNEL);
 350         if (!intel_hdmi)
 351                 return;
 352
 353         intel_connector = kzalloc(sizeof(struct intel_connector), GFP_KERNEL);
 354         if (!intel_connector) {
 355                 kfree(intel_hdmi);
 356                 return;
 357         }
 358
 359         intel_encoder = &intel_hdmi->base;
 360         drm_encoder_init(dev, &intel_encoder->base, &intel_hdmi_enc_funcs,
 361                          DRM_MODE_ENCODER_TMDS);
 362
 363         connector = &intel_connector->base;
 364         drm_connector_init(dev, connector, &intel_hdmi_connector_funcs,
 365                            DRM_MODE_CONNECTOR_HDMIA);
 366         drm_connector_helper_add(connector, &intel_hdmi_connector_helper_funcs);
 367
 368         intel_encoder->type = INTEL_OUTPUT_HDMI;
 369
 370         connector->polled = DRM_CONNECTOR_POLL_HPD;
 371         connector->interlace_allowed = 0;
 372         connector->doublescan_allowed = 0;
 373         intel_encoder->crtc_mask = (1 << 0) | (1 << 1);
 374
 375         /* Set up the DDC bus. */
 376         if (sdvox_reg == SDVOB) {
 377                 intel_encoder->clone_mask = (1 << INTEL_HDMIB_CLONE_BIT);
 378                 intel_hdmi->ddc_bus = GMBUS_PORT_DPB;
 379                 dev_priv->hotplug_supported_mask |= HDMIB_HOTPLUG_INT_STATUS;
 380         } else if (sdvox_reg == SDVOC) {
 381                 intel_encoder->clone_mask = (1 << INTEL_HDMIC_CLONE_BIT);
 382                 intel_hdmi->ddc_bus = GMBUS_PORT_DPC;
 383                 dev_priv->hotplug_supported_mask |= HDMIC_HOTPLUG_INT_STATUS;
 384         } else if (sdvox_reg == HDMIB) {
 385                 intel_encoder->clone_mask = (1 << INTEL_HDMID_CLONE_BIT);
 386                 intel_hdmi->ddc_bus = GMBUS_PORT_DPB;
 387                 dev_priv->hotplug_supported_mask |= HDMIB_HOTPLUG_INT_STATUS;
 388         } else if (sdvox_reg == HDMIC) {
 389                 intel_encoder->clone_mask = (1 << INTEL_HDMIE_CLONE_BIT);
 390                 intel_hdmi->ddc_bus = GMBUS_PORT_DPC;
 391                 dev_priv->hotplug_supported_mask |= HDMIC_HOTPLUG_INT_STATUS;
 392         } else if (sdvox_reg == HDMID) {
 393                 intel_encoder->clone_mask = (1 << INTEL_HDMIF_CLONE_BIT);
 394                 intel_hdmi->ddc_bus = GMBUS_PORT_DPD;
 395                 dev_priv->hotplug_supported_mask |= HDMID_HOTPLUG_INT_STATUS;
 396         }
 397
 398         intel_hdmi->sdvox_reg = sdvox_reg;
 399
 400         drm_encoder_helper_add(&intel_encoder->base, &intel_hdmi_helper_funcs);
 401
 402         intel_hdmi_add_properties(intel_hdmi, connector);
 403
 404         intel_connector_attach_encoder(intel_connector, intel_encoder);
 405         drm_sysfs_connector_add(connector);
 406
 407         /* For G4X desktop chip, PEG_BAND_GAP_DATA 3:0 must first be written
 408          * 0xd.  Failure to do so will result in spurious interrupts being
 409          * generated on the port when a cable is not attached.
 410          */
 411         if (IS_G4X(dev) && !IS_GM45(dev)) {
 412                 u32 temp = I915_READ(PEG_BAND_GAP_DATA);
 413                 I915_WRITE(PEG_BAND_GAP_DATA, (temp & ~0xf) | 0xd);
 414         }
 415 }