git.oblomov.eu Git - linux-2.6/blob - 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/delay.h>
  31 #include "drmP.h"
  32 #include "drm.h"
  33 #include "drm_crtc.h"
  34 #include "drm_edid.h"
  35 #include "intel_drv.h"
  36 #include "i915_drm.h"
  37 #include "i915_drv.h"
  38
  39 struct intel_hdmi_priv {
  40         u32 sdvox_reg;
  41         u32 save_SDVOX;
  42         bool has_hdmi_sink;
  43 };
  44
  45 static void intel_hdmi_mode_set(struct drm_encoder *encoder,
  46                                 struct drm_display_mode *mode,
  47                                 struct drm_display_mode *adjusted_mode)
  48 {
  49         struct drm_device *dev = encoder->dev;
  50         struct drm_i915_private *dev_priv = dev->dev_private;
  51         struct drm_crtc *crtc = encoder->crtc;
  52         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
  53         struct intel_output *intel_output = enc_to_intel_output(encoder);
  54         struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv;
  55         u32 sdvox;
  56
  57         sdvox = SDVO_ENCODING_HDMI |
  58                 SDVO_BORDER_ENABLE |
  59                 SDVO_VSYNC_ACTIVE_HIGH |
  60                 SDVO_HSYNC_ACTIVE_HIGH |
  61                 SDVO_NULL_PACKETS_DURING_VSYNC;
  62
  63         if (hdmi_priv->has_hdmi_sink)
  64                 sdvox |= SDVO_AUDIO_ENABLE;
  65
  66         if (intel_crtc->pipe == 1)
  67                 sdvox |= SDVO_PIPE_B_SELECT;
  68
  69         I915_WRITE(hdmi_priv->sdvox_reg, sdvox);
  70         POSTING_READ(hdmi_priv->sdvox_reg);
  71 }
  72
  73 static void intel_hdmi_dpms(struct drm_encoder *encoder, int mode)
  74 {
  75         struct drm_device *dev = encoder->dev;
  76         struct drm_i915_private *dev_priv = dev->dev_private;
  77         struct intel_output *intel_output = enc_to_intel_output(encoder);
  78         struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv;
  79         u32 temp;
  80
  81         if (mode != DRM_MODE_DPMS_ON) {
  82                 temp = I915_READ(hdmi_priv->sdvox_reg);
  83                 I915_WRITE(hdmi_priv->sdvox_reg, temp & ~SDVO_ENABLE);
  84         } else {
  85                 temp = I915_READ(hdmi_priv->sdvox_reg);
  86                 I915_WRITE(hdmi_priv->sdvox_reg, temp | SDVO_ENABLE);
  87         }
  88         POSTING_READ(hdmi_priv->sdvox_reg);
  89 }
  90
  91 static void intel_hdmi_save(struct drm_connector *connector)
  92 {
  93         struct drm_device *dev = connector->dev;
  94         struct drm_i915_private *dev_priv = dev->dev_private;
  95         struct intel_output *intel_output = to_intel_output(connector);
  96         struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv;
  97
  98         hdmi_priv->save_SDVOX = I915_READ(hdmi_priv->sdvox_reg);
  99 }
 100
 101 static void intel_hdmi_restore(struct drm_connector *connector)
 102 {
 103         struct drm_device *dev = connector->dev;
 104         struct drm_i915_private *dev_priv = dev->dev_private;
 105         struct intel_output *intel_output = to_intel_output(connector);
 106         struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv;
 107
 108         I915_WRITE(hdmi_priv->sdvox_reg, hdmi_priv->save_SDVOX);
 109         POSTING_READ(hdmi_priv->sdvox_reg);
 110 }
 111
 112 static int intel_hdmi_mode_valid(struct drm_connector *connector,
 113                                  struct drm_display_mode *mode)
 114 {
 115         if (mode->clock > 165000)
 116                 return MODE_CLOCK_HIGH;
 117         if (mode->clock < 20000)
 118                 return MODE_CLOCK_HIGH;
 119
 120         if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
 121                 return MODE_NO_DBLESCAN;
 122
 123         return MODE_OK;
 124 }
 125
 126 static bool intel_hdmi_mode_fixup(struct drm_encoder *encoder,
 127                                   struct drm_display_mode *mode,
 128                                   struct drm_display_mode *adjusted_mode)
 129 {
 130         return true;
 131 }
 132
 133 static enum drm_connector_status
 134 intel_hdmi_edid_detect(struct drm_connector *connector)
 135 {
 136         struct intel_output *intel_output = to_intel_output(connector);
 137         struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv;
 138         struct edid *edid = NULL;
 139         enum drm_connector_status status = connector_status_disconnected;
 140
 141         edid = drm_get_edid(&intel_output->base,
 142                             intel_output->ddc_bus);
 143         hdmi_priv->has_hdmi_sink = false;
 144         if (edid) {
 145                 if (edid->input & DRM_EDID_INPUT_DIGITAL) {
 146                         status = connector_status_connected;
 147                         hdmi_priv->has_hdmi_sink = drm_detect_hdmi_monitor(edid);
 148                 }
 149                 intel_output->base.display_info.raw_edid = NULL;
 150                 kfree(edid);
 151         }
 152         return status;
 153 }
 154
 155 static enum drm_connector_status
 156 igdng_hdmi_detect(struct drm_connector *connector)
 157 {
 158         struct intel_output *intel_output = to_intel_output(connector);
 159         struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv;
 160
 161         /* FIXME hotplug detect */
 162
 163         hdmi_priv->has_hdmi_sink = false;
 164         return intel_hdmi_edid_detect(connector);
 165 }
 166
 167 static enum drm_connector_status
 168 intel_hdmi_detect(struct drm_connector *connector)
 169 {
 170         struct drm_device *dev = connector->dev;
 171         struct drm_i915_private *dev_priv = dev->dev_private;
 172         struct intel_output *intel_output = to_intel_output(connector);
 173         struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv;
 174         u32 temp, bit;
 175
 176         if (IS_IGDNG(dev))
 177                 return igdng_hdmi_detect(connector);
 178
 179         temp = I915_READ(PORT_HOTPLUG_EN);
 180
 181         switch (hdmi_priv->sdvox_reg) {
 182         case SDVOB:
 183                 temp |= HDMIB_HOTPLUG_INT_EN;
 184                 break;
 185         case SDVOC:
 186                 temp |= HDMIC_HOTPLUG_INT_EN;
 187                 break;
 188         default:
 189                 return connector_status_unknown;
 190         }
 191
 192         I915_WRITE(PORT_HOTPLUG_EN, temp);
 193
 194         POSTING_READ(PORT_HOTPLUG_EN);
 195
 196         switch (hdmi_priv->sdvox_reg) {
 197         case SDVOB:
 198                 bit = HDMIB_HOTPLUG_INT_STATUS;
 199                 break;
 200         case SDVOC:
 201                 bit = HDMIC_HOTPLUG_INT_STATUS;
 202                 break;
 203         default:
 204                 return connector_status_unknown;
 205         }
 206
 207         if ((I915_READ(PORT_HOTPLUG_STAT) & bit) != 0)
 208                 return intel_hdmi_edid_detect(connector);
 209         else
 210                 return connector_status_disconnected;
 211 }
 212
 213 static int intel_hdmi_get_modes(struct drm_connector *connector)
 214 {
 215         struct intel_output *intel_output = to_intel_output(connector);
 216
 217         /* We should parse the EDID data and find out if it's an HDMI sink so
 218          * we can send audio to it.
 219          */
 220
 221         return intel_ddc_get_modes(intel_output);
 222 }
 223
 224 static void intel_hdmi_destroy(struct drm_connector *connector)
 225 {
 226         struct intel_output *intel_output = to_intel_output(connector);
 227
 228         if (intel_output->i2c_bus)
 229                 intel_i2c_destroy(intel_output->i2c_bus);
 230         drm_sysfs_connector_remove(connector);
 231         drm_connector_cleanup(connector);
 232         kfree(intel_output);
 233 }
 234
 235 static const struct drm_encoder_helper_funcs intel_hdmi_helper_funcs = {
 236         .dpms = intel_hdmi_dpms,
 237         .mode_fixup = intel_hdmi_mode_fixup,
 238         .prepare = intel_encoder_prepare,
 239         .mode_set = intel_hdmi_mode_set,
 240         .commit = intel_encoder_commit,
 241 };
 242
 243 static const struct drm_connector_funcs intel_hdmi_connector_funcs = {
 244         .dpms = drm_helper_connector_dpms,
 245         .save = intel_hdmi_save,
 246         .restore = intel_hdmi_restore,
 247         .detect = intel_hdmi_detect,
 248         .fill_modes = drm_helper_probe_single_connector_modes,
 249         .destroy = intel_hdmi_destroy,
 250 };
 251
 252 static const struct drm_connector_helper_funcs intel_hdmi_connector_helper_funcs = {
 253         .get_modes = intel_hdmi_get_modes,
 254         .mode_valid = intel_hdmi_mode_valid,
 255         .best_encoder = intel_best_encoder,
 256 };
 257
 258 static void intel_hdmi_enc_destroy(struct drm_encoder *encoder)
 259 {
 260         drm_encoder_cleanup(encoder);
 261 }
 262
 263 static const struct drm_encoder_funcs intel_hdmi_enc_funcs = {
 264         .destroy = intel_hdmi_enc_destroy,
 265 };
 266
 267
 268 void intel_hdmi_init(struct drm_device *dev, int sdvox_reg)
 269 {
 270         struct drm_i915_private *dev_priv = dev->dev_private;
 271         struct drm_connector *connector;
 272         struct intel_output *intel_output;
 273         struct intel_hdmi_priv *hdmi_priv;
 274
 275         intel_output = kcalloc(sizeof(struct intel_output) +
 276                                sizeof(struct intel_hdmi_priv), 1, GFP_KERNEL);
 277         if (!intel_output)
 278                 return;
 279         hdmi_priv = (struct intel_hdmi_priv *)(intel_output + 1);
 280
 281         connector = &intel_output->base;
 282         drm_connector_init(dev, connector, &intel_hdmi_connector_funcs,
 283                            DRM_MODE_CONNECTOR_DVID);
 284         drm_connector_helper_add(connector, &intel_hdmi_connector_helper_funcs);
 285
 286         intel_output->type = INTEL_OUTPUT_HDMI;
 287
 288         connector->interlace_allowed = 0;
 289         connector->doublescan_allowed = 0;
 290
 291         /* Set up the DDC bus. */
 292         if (sdvox_reg == SDVOB)
 293                 intel_output->ddc_bus = intel_i2c_create(dev, GPIOE, "HDMIB");
 294         else if (sdvox_reg == SDVOC)
 295                 intel_output->ddc_bus = intel_i2c_create(dev, GPIOD, "HDMIC");
 296         else if (sdvox_reg == HDMIB)
 297                 intel_output->ddc_bus = intel_i2c_create(dev, PCH_GPIOE,
 298                                                                 "HDMIB");
 299         else if (sdvox_reg == HDMIC)
 300                 intel_output->ddc_bus = intel_i2c_create(dev, PCH_GPIOD,
 301                                                                 "HDMIC");
 302         else if (sdvox_reg == HDMID)
 303                 intel_output->ddc_bus = intel_i2c_create(dev, PCH_GPIOF,
 304                                                                 "HDMID");
 305
 306         if (!intel_output->ddc_bus)
 307                 goto err_connector;
 308
 309         hdmi_priv->sdvox_reg = sdvox_reg;
 310         intel_output->dev_priv = hdmi_priv;
 311
 312         drm_encoder_init(dev, &intel_output->enc, &intel_hdmi_enc_funcs,
 313                          DRM_MODE_ENCODER_TMDS);
 314         drm_encoder_helper_add(&intel_output->enc, &intel_hdmi_helper_funcs);
 315
 316         drm_mode_connector_attach_encoder(&intel_output->base,
 317                                           &intel_output->enc);
 318         drm_sysfs_connector_add(connector);
 319
 320         /* For G4X desktop chip, PEG_BAND_GAP_DATA 3:0 must first be written
 321          * 0xd.  Failure to do so will result in spurious interrupts being
 322          * generated on the port when a cable is not attached.
 323          */
 324         if (IS_G4X(dev) && !IS_GM45(dev)) {
 325                 u32 temp = I915_READ(PEG_BAND_GAP_DATA);
 326                 I915_WRITE(PEG_BAND_GAP_DATA, (temp & ~0xf) | 0xd);
 327         }
 328
 329         return;
 330
 331 err_connector:
 332         drm_connector_cleanup(connector);
 333         kfree(intel_output);
 334
 335         return;
 336 }