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