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 static void intel_hdmi_mode_set(struct drm_encoder *encoder,
  62                                 struct drm_display_mode *mode,
  63                                 struct drm_display_mode *adjusted_mode)
  64 {
  65         struct drm_device *dev = encoder->dev;
  66         struct drm_i915_private *dev_priv = dev->dev_private;
  67         struct drm_crtc *crtc = encoder->crtc;
  68         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
  69         struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
  70         u32 sdvox;
  71
  72         sdvox = SDVO_ENCODING_HDMI | SDVO_BORDER_ENABLE;
  73         if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
  74                 sdvox |= SDVO_VSYNC_ACTIVE_HIGH;
  75         if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
  76                 sdvox |= SDVO_HSYNC_ACTIVE_HIGH;
  77
  78         /* Required on CPT */
  79         if (intel_hdmi->has_hdmi_sink && HAS_PCH_CPT(dev))
  80                 sdvox |= HDMI_MODE_SELECT;
  81
  82         if (intel_hdmi->has_audio)
  83                 sdvox |= SDVO_AUDIO_ENABLE;
  84
  85         if (intel_crtc->pipe == 1) {
  86                 if (HAS_PCH_CPT(dev))
  87                         sdvox |= PORT_TRANS_B_SEL_CPT;
  88                 else
  89                         sdvox |= SDVO_PIPE_B_SELECT;
  90         }
  91
  92         I915_WRITE(intel_hdmi->sdvox_reg, sdvox);
  93         POSTING_READ(intel_hdmi->sdvox_reg);
  94 }
  95
  96 static void intel_hdmi_dpms(struct drm_encoder *encoder, int mode)
  97 {
  98         struct drm_device *dev = encoder->dev;
  99         struct drm_i915_private *dev_priv = dev->dev_private;
 100         struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
 101         u32 temp;
 102
 103         temp = I915_READ(intel_hdmi->sdvox_reg);
 104
 105         /* HW workaround, need to toggle enable bit off and on for 12bpc, but
 106          * we do this anyway which shows more stable in testing.
 107          */
 108         if (HAS_PCH_SPLIT(dev)) {
 109                 I915_WRITE(intel_hdmi->sdvox_reg, temp & ~SDVO_ENABLE);
 110                 POSTING_READ(intel_hdmi->sdvox_reg);
 111         }
 112
 113         if (mode != DRM_MODE_DPMS_ON) {
 114                 temp &= ~SDVO_ENABLE;
 115         } else {
 116                 temp |= SDVO_ENABLE;
 117         }
 118
 119         I915_WRITE(intel_hdmi->sdvox_reg, temp);
 120         POSTING_READ(intel_hdmi->sdvox_reg);
 121
 122         /* HW workaround, need to write this twice for issue that may result
 123          * in first write getting masked.
 124          */
 125         if (HAS_PCH_SPLIT(dev)) {
 126                 I915_WRITE(intel_hdmi->sdvox_reg, temp);
 127                 POSTING_READ(intel_hdmi->sdvox_reg);
 128         }
 129 }
 130
 131 static int intel_hdmi_mode_valid(struct drm_connector *connector,
 132                                  struct drm_display_mode *mode)
 133 {
 134         if (mode->clock > 165000)
 135                 return MODE_CLOCK_HIGH;
 136         if (mode->clock < 20000)
 137                 return MODE_CLOCK_HIGH;
 138
 139         if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
 140                 return MODE_NO_DBLESCAN;
 141
 142         return MODE_OK;
 143 }
 144
 145 static bool intel_hdmi_mode_fixup(struct drm_encoder *encoder,
 146                                   struct drm_display_mode *mode,
 147                                   struct drm_display_mode *adjusted_mode)
 148 {
 149         return true;
 150 }
 151
 152 static enum drm_connector_status
 153 intel_hdmi_detect(struct drm_connector *connector, bool force)
 154 {
 155         struct intel_hdmi *intel_hdmi = intel_attached_hdmi(connector);
 156         struct drm_i915_private *dev_priv = connector->dev->dev_private;
 157         struct edid *edid;
 158         enum drm_connector_status status = connector_status_disconnected;
 159
 160         intel_hdmi->has_hdmi_sink = false;
 161         intel_hdmi->has_audio = false;
 162         edid = drm_get_edid(connector,
 163                             &dev_priv->gmbus[intel_hdmi->ddc_bus].adapter);
 164
 165         if (edid) {
 166                 if (edid->input & DRM_EDID_INPUT_DIGITAL) {
 167                         status = connector_status_connected;
 168                         intel_hdmi->has_hdmi_sink = drm_detect_hdmi_monitor(edid);
 169                         intel_hdmi->has_audio = drm_detect_monitor_audio(edid);
 170                 }
 171                 connector->display_info.raw_edid = NULL;
 172                 kfree(edid);
 173         }
 174
 175         if (status == connector_status_connected) {
 176                 if (intel_hdmi->force_audio)
 177                         intel_hdmi->has_audio = intel_hdmi->force_audio > 0;
 178         }
 179
 180         return status;
 181 }
 182
 183 static int intel_hdmi_get_modes(struct drm_connector *connector)
 184 {
 185         struct intel_hdmi *intel_hdmi = intel_attached_hdmi(connector);
 186         struct drm_i915_private *dev_priv = connector->dev->dev_private;
 187
 188         /* We should parse the EDID data and find out if it's an HDMI sink so
 189          * we can send audio to it.
 190          */
 191
 192         return intel_ddc_get_modes(connector,
 193                                    &dev_priv->gmbus[intel_hdmi->ddc_bus].adapter);
 194 }
 195
 196 static int
 197 intel_hdmi_set_property(struct drm_connector *connector,
 198                       struct drm_property *property,
 199                       uint64_t val)
 200 {
 201         struct intel_hdmi *intel_hdmi = intel_attached_hdmi(connector);
 202         int ret;
 203
 204         ret = drm_connector_property_set_value(connector, property, val);
 205         if (ret)
 206                 return ret;
 207
 208         if (property == intel_hdmi->force_audio_property) {
 209                 if (val == intel_hdmi->force_audio)
 210                         return 0;
 211
 212                 intel_hdmi->force_audio = val;
 213
 214                 if (val > 0 && intel_hdmi->has_audio)
 215                         return 0;
 216                 if (val < 0 && !intel_hdmi->has_audio)
 217                         return 0;
 218
 219                 intel_hdmi->has_audio = val > 0;
 220                 goto done;
 221         }
 222
 223         return -EINVAL;
 224
 225 done:
 226         if (intel_hdmi->base.base.crtc) {
 227                 struct drm_crtc *crtc = intel_hdmi->base.base.crtc;
 228                 drm_crtc_helper_set_mode(crtc, &crtc->mode,
 229                                          crtc->x, crtc->y,
 230                                          crtc->fb);
 231         }
 232
 233         return 0;
 234 }
 235
 236 static void intel_hdmi_destroy(struct drm_connector *connector)
 237 {
 238         drm_sysfs_connector_remove(connector);
 239         drm_connector_cleanup(connector);
 240         kfree(connector);
 241 }
 242
 243 static const struct drm_encoder_helper_funcs intel_hdmi_helper_funcs = {
 244         .dpms = intel_hdmi_dpms,
 245         .mode_fixup = intel_hdmi_mode_fixup,
 246         .prepare = intel_encoder_prepare,
 247         .mode_set = intel_hdmi_mode_set,
 248         .commit = intel_encoder_commit,
 249 };
 250
 251 static const struct drm_connector_funcs intel_hdmi_connector_funcs = {
 252         .dpms = drm_helper_connector_dpms,
 253         .detect = intel_hdmi_detect,
 254         .fill_modes = drm_helper_probe_single_connector_modes,
 255         .set_property = intel_hdmi_set_property,
 256         .destroy = intel_hdmi_destroy,
 257 };
 258
 259 static const struct drm_connector_helper_funcs intel_hdmi_connector_helper_funcs = {
 260         .get_modes = intel_hdmi_get_modes,
 261         .mode_valid = intel_hdmi_mode_valid,
 262         .best_encoder = intel_best_encoder,
 263 };
 264
 265 static const struct drm_encoder_funcs intel_hdmi_enc_funcs = {
 266         .destroy = intel_encoder_destroy,
 267 };
 268
 269 static void
 270 intel_hdmi_add_properties(struct intel_hdmi *intel_hdmi, struct drm_connector *connector)
 271 {
 272         struct drm_device *dev = connector->dev;
 273
 274         intel_hdmi->force_audio_property =
 275                 drm_property_create(dev, DRM_MODE_PROP_RANGE, "force_audio", 2);
 276         if (intel_hdmi->force_audio_property) {
 277                 intel_hdmi->force_audio_property->values[0] = -1;
 278                 intel_hdmi->force_audio_property->values[1] = 1;
 279                 drm_connector_attach_property(connector, intel_hdmi->force_audio_property, 0);
 280         }
 281 }
 282
 283 void intel_hdmi_init(struct drm_device *dev, int sdvox_reg)
 284 {
 285         struct drm_i915_private *dev_priv = dev->dev_private;
 286         struct drm_connector *connector;
 287         struct intel_encoder *intel_encoder;
 288         struct intel_connector *intel_connector;
 289         struct intel_hdmi *intel_hdmi;
 290
 291         intel_hdmi = kzalloc(sizeof(struct intel_hdmi), GFP_KERNEL);
 292         if (!intel_hdmi)
 293                 return;
 294
 295         intel_connector = kzalloc(sizeof(struct intel_connector), GFP_KERNEL);
 296         if (!intel_connector) {
 297                 kfree(intel_hdmi);
 298                 return;
 299         }
 300
 301         intel_encoder = &intel_hdmi->base;
 302         drm_encoder_init(dev, &intel_encoder->base, &intel_hdmi_enc_funcs,
 303                          DRM_MODE_ENCODER_TMDS);
 304
 305         connector = &intel_connector->base;
 306         drm_connector_init(dev, connector, &intel_hdmi_connector_funcs,
 307                            DRM_MODE_CONNECTOR_HDMIA);
 308         drm_connector_helper_add(connector, &intel_hdmi_connector_helper_funcs);
 309
 310         intel_encoder->type = INTEL_OUTPUT_HDMI;
 311
 312         connector->polled = DRM_CONNECTOR_POLL_HPD;
 313         connector->interlace_allowed = 0;
 314         connector->doublescan_allowed = 0;
 315         intel_encoder->crtc_mask = (1 << 0) | (1 << 1);
 316
 317         /* Set up the DDC bus. */
 318         if (sdvox_reg == SDVOB) {
 319                 intel_encoder->clone_mask = (1 << INTEL_HDMIB_CLONE_BIT);
 320                 intel_hdmi->ddc_bus = GMBUS_PORT_DPB;
 321                 dev_priv->hotplug_supported_mask |= HDMIB_HOTPLUG_INT_STATUS;
 322         } else if (sdvox_reg == SDVOC) {
 323                 intel_encoder->clone_mask = (1 << INTEL_HDMIC_CLONE_BIT);
 324                 intel_hdmi->ddc_bus = GMBUS_PORT_DPC;
 325                 dev_priv->hotplug_supported_mask |= HDMIC_HOTPLUG_INT_STATUS;
 326         } else if (sdvox_reg == HDMIB) {
 327                 intel_encoder->clone_mask = (1 << INTEL_HDMID_CLONE_BIT);
 328                 intel_hdmi->ddc_bus = GMBUS_PORT_DPB;
 329                 dev_priv->hotplug_supported_mask |= HDMIB_HOTPLUG_INT_STATUS;
 330         } else if (sdvox_reg == HDMIC) {
 331                 intel_encoder->clone_mask = (1 << INTEL_HDMIE_CLONE_BIT);
 332                 intel_hdmi->ddc_bus = GMBUS_PORT_DPC;
 333                 dev_priv->hotplug_supported_mask |= HDMIC_HOTPLUG_INT_STATUS;
 334         } else if (sdvox_reg == HDMID) {
 335                 intel_encoder->clone_mask = (1 << INTEL_HDMIF_CLONE_BIT);
 336                 intel_hdmi->ddc_bus = GMBUS_PORT_DPD;
 337                 dev_priv->hotplug_supported_mask |= HDMID_HOTPLUG_INT_STATUS;
 338         }
 339
 340         intel_hdmi->sdvox_reg = sdvox_reg;
 341
 342         drm_encoder_helper_add(&intel_encoder->base, &intel_hdmi_helper_funcs);
 343
 344         intel_hdmi_add_properties(intel_hdmi, connector);
 345
 346         intel_connector_attach_encoder(intel_connector, intel_encoder);
 347         drm_sysfs_connector_add(connector);
 348
 349         /* For G4X desktop chip, PEG_BAND_GAP_DATA 3:0 must first be written
 350          * 0xd.  Failure to do so will result in spurious interrupts being
 351          * generated on the port when a cable is not attached.
 352          */
 353         if (IS_G4X(dev) && !IS_GM45(dev)) {
 354                 u32 temp = I915_READ(PEG_BAND_GAP_DATA);
 355                 I915_WRITE(PEG_BAND_GAP_DATA, (temp & ~0xf) | 0xd);
 356         }
 357 }