release/src-rt-6.x.4708/linux/linux-2.6.36/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         bool has_hdmi_sink;
  44 };
  45
  46 static struct intel_hdmi *enc_to_intel_hdmi(struct drm_encoder *encoder)
  47 {
  48         return container_of(enc_to_intel_encoder(encoder), struct intel_hdmi, base);
  49 }
  50
  51 static void intel_hdmi_mode_set(struct drm_encoder *encoder,
  52                                 struct drm_display_mode *mode,
  53                                 struct drm_display_mode *adjusted_mode)
  54 {
  55         struct drm_device *dev = encoder->dev;
  56         struct drm_i915_private *dev_priv = dev->dev_private;
  57         struct drm_crtc *crtc = encoder->crtc;
  58         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
  59         struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
  60         u32 sdvox;
  61
  62         sdvox = SDVO_ENCODING_HDMI | SDVO_BORDER_ENABLE;
  63         if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
  64                 sdvox |= SDVO_VSYNC_ACTIVE_HIGH;
  65         if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
  66                 sdvox |= SDVO_HSYNC_ACTIVE_HIGH;
  67
  68         if (intel_hdmi->has_hdmi_sink) {
  69                 sdvox |= SDVO_AUDIO_ENABLE;
  70                 if (HAS_PCH_CPT(dev))
  71                         sdvox |= HDMI_MODE_SELECT;
  72         }
  73
  74         if (intel_crtc->pipe == 1) {
  75                 if (HAS_PCH_CPT(dev))
  76                         sdvox |= PORT_TRANS_B_SEL_CPT;
  77                 else
  78                         sdvox |= SDVO_PIPE_B_SELECT;
  79         }
  80
  81         I915_WRITE(intel_hdmi->sdvox_reg, sdvox);
  82         POSTING_READ(intel_hdmi->sdvox_reg);
  83 }
  84
  85 static void intel_hdmi_dpms(struct drm_encoder *encoder, int mode)
  86 {
  87         struct drm_device *dev = encoder->dev;
  88         struct drm_i915_private *dev_priv = dev->dev_private;
  89         struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
  90         u32 temp;
  91
  92         temp = I915_READ(intel_hdmi->sdvox_reg);
  93
  94         if (HAS_PCH_SPLIT(dev)) {
  95                 I915_WRITE(intel_hdmi->sdvox_reg, temp & ~SDVO_ENABLE);
  96                 POSTING_READ(intel_hdmi->sdvox_reg);
  97         }
  98
  99         if (mode != DRM_MODE_DPMS_ON) {
 100                 temp &= ~SDVO_ENABLE;
 101         } else {
 102                 temp |= SDVO_ENABLE;
 103         }
 104
 105         I915_WRITE(intel_hdmi->sdvox_reg, temp);
 106         POSTING_READ(intel_hdmi->sdvox_reg);
 107
 108         if (HAS_PCH_SPLIT(dev)) {
 109                 I915_WRITE(intel_hdmi->sdvox_reg, temp);
 110                 POSTING_READ(intel_hdmi->sdvox_reg);
 111         }
 112 }
 113
 114 static int intel_hdmi_mode_valid(struct drm_connector *connector,
 115                                  struct drm_display_mode *mode)
 116 {
 117         if (mode->clock > 165000)
 118                 return MODE_CLOCK_HIGH;
 119         if (mode->clock < 20000)
 120                 return MODE_CLOCK_HIGH;
 121
 122         if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
 123                 return MODE_NO_DBLESCAN;
 124
 125         return MODE_OK;
 126 }
 127
 128 static bool intel_hdmi_mode_fixup(struct drm_encoder *encoder,
 129                                   struct drm_display_mode *mode,
 130                                   struct drm_display_mode *adjusted_mode)
 131 {
 132         return true;
 133 }
 134
 135 static enum drm_connector_status
 136 intel_hdmi_detect(struct drm_connector *connector, bool force)
 137 {
 138         struct drm_encoder *encoder = intel_attached_encoder(connector);
 139         struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
 140         struct edid *edid = NULL;
 141         enum drm_connector_status status = connector_status_disconnected;
 142
 143         intel_hdmi->has_hdmi_sink = false;
 144         edid = drm_get_edid(connector, intel_hdmi->base.ddc_bus);
 145
 146         if (edid) {
 147                 if (edid->input & DRM_EDID_INPUT_DIGITAL) {
 148                         status = connector_status_connected;
 149                         intel_hdmi->has_hdmi_sink = drm_detect_hdmi_monitor(edid);
 150                 }
 151                 connector->display_info.raw_edid = NULL;
 152                 kfree(edid);
 153         }
 154
 155         return status;
 156 }
 157
 158 static int intel_hdmi_get_modes(struct drm_connector *connector)
 159 {
 160         struct drm_encoder *encoder = intel_attached_encoder(connector);
 161         struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
 162
 163         /* We should parse the EDID data and find out if it's an HDMI sink so
 164          * we can send audio to it.
 165          */
 166
 167         return intel_ddc_get_modes(connector, intel_hdmi->base.ddc_bus);
 168 }
 169
 170 static void intel_hdmi_destroy(struct drm_connector *connector)
 171 {
 172         drm_sysfs_connector_remove(connector);
 173         drm_connector_cleanup(connector);
 174         kfree(connector);
 175 }
 176
 177 static const struct drm_encoder_helper_funcs intel_hdmi_helper_funcs = {
 178         .dpms = intel_hdmi_dpms,
 179         .mode_fixup = intel_hdmi_mode_fixup,
 180         .prepare = intel_encoder_prepare,
 181         .mode_set = intel_hdmi_mode_set,
 182         .commit = intel_encoder_commit,
 183 };
 184
 185 static const struct drm_connector_funcs intel_hdmi_connector_funcs = {
 186         .dpms = drm_helper_connector_dpms,
 187         .detect = intel_hdmi_detect,
 188         .fill_modes = drm_helper_probe_single_connector_modes,
 189         .destroy = intel_hdmi_destroy,
 190 };
 191
 192 static const struct drm_connector_helper_funcs intel_hdmi_connector_helper_funcs = {
 193         .get_modes = intel_hdmi_get_modes,
 194         .mode_valid = intel_hdmi_mode_valid,
 195         .best_encoder = intel_attached_encoder,
 196 };
 197
 198 static const struct drm_encoder_funcs intel_hdmi_enc_funcs = {
 199         .destroy = intel_encoder_destroy,
 200 };
 201
 202 void intel_hdmi_init(struct drm_device *dev, int sdvox_reg)
 203 {
 204         struct drm_i915_private *dev_priv = dev->dev_private;
 205         struct drm_connector *connector;
 206         struct intel_encoder *intel_encoder;
 207         struct intel_connector *intel_connector;
 208         struct intel_hdmi *intel_hdmi;
 209
 210         intel_hdmi = kzalloc(sizeof(struct intel_hdmi), GFP_KERNEL);
 211         if (!intel_hdmi)
 212                 return;
 213
 214         intel_connector = kzalloc(sizeof(struct intel_connector), GFP_KERNEL);
 215         if (!intel_connector) {
 216                 kfree(intel_hdmi);
 217                 return;
 218         }
 219
 220         intel_encoder = &intel_hdmi->base;
 221         connector = &intel_connector->base;
 222         drm_connector_init(dev, connector, &intel_hdmi_connector_funcs,
 223                            DRM_MODE_CONNECTOR_HDMIA);
 224         drm_connector_helper_add(connector, &intel_hdmi_connector_helper_funcs);
 225
 226         intel_encoder->type = INTEL_OUTPUT_HDMI;
 227
 228         connector->polled = DRM_CONNECTOR_POLL_HPD;
 229         connector->interlace_allowed = 0;
 230         connector->doublescan_allowed = 0;
 231         intel_encoder->crtc_mask = (1 << 0) | (1 << 1);
 232
 233         /* Set up the DDC bus. */
 234         if (sdvox_reg == SDVOB) {
 235                 intel_encoder->clone_mask = (1 << INTEL_HDMIB_CLONE_BIT);
 236                 intel_encoder->ddc_bus = intel_i2c_create(dev, GPIOE, "HDMIB");
 237                 dev_priv->hotplug_supported_mask |= HDMIB_HOTPLUG_INT_STATUS;
 238         } else if (sdvox_reg == SDVOC) {
 239                 intel_encoder->clone_mask = (1 << INTEL_HDMIC_CLONE_BIT);
 240                 intel_encoder->ddc_bus = intel_i2c_create(dev, GPIOD, "HDMIC");
 241                 dev_priv->hotplug_supported_mask |= HDMIC_HOTPLUG_INT_STATUS;
 242         } else if (sdvox_reg == HDMIB) {
 243                 intel_encoder->clone_mask = (1 << INTEL_HDMID_CLONE_BIT);
 244                 intel_encoder->ddc_bus = intel_i2c_create(dev, PCH_GPIOE,
 245                                                                 "HDMIB");
 246                 dev_priv->hotplug_supported_mask |= HDMIB_HOTPLUG_INT_STATUS;
 247         } else if (sdvox_reg == HDMIC) {
 248                 intel_encoder->clone_mask = (1 << INTEL_HDMIE_CLONE_BIT);
 249                 intel_encoder->ddc_bus = intel_i2c_create(dev, PCH_GPIOD,
 250                                                                 "HDMIC");
 251                 dev_priv->hotplug_supported_mask |= HDMIC_HOTPLUG_INT_STATUS;
 252         } else if (sdvox_reg == HDMID) {
 253                 intel_encoder->clone_mask = (1 << INTEL_HDMIF_CLONE_BIT);
 254                 intel_encoder->ddc_bus = intel_i2c_create(dev, PCH_GPIOF,
 255                                                                 "HDMID");
 256                 dev_priv->hotplug_supported_mask |= HDMID_HOTPLUG_INT_STATUS;
 257         }
 258         if (!intel_encoder->ddc_bus)
 259                 goto err_connector;
 260
 261         intel_hdmi->sdvox_reg = sdvox_reg;
 262
 263         drm_encoder_init(dev, &intel_encoder->enc, &intel_hdmi_enc_funcs,
 264                          DRM_MODE_ENCODER_TMDS);
 265         drm_encoder_helper_add(&intel_encoder->enc, &intel_hdmi_helper_funcs);
 266
 267         drm_mode_connector_attach_encoder(&intel_connector->base,
 268                                           &intel_encoder->enc);
 269         drm_sysfs_connector_add(connector);
 270
 271         /* For G4X desktop chip, PEG_BAND_GAP_DATA 3:0 must first be written
 272          * 0xd.  Failure to do so will result in spurious interrupts being
 273          * generated on the port when a cable is not attached.
 274          */
 275         if (IS_G4X(dev) && !IS_GM45(dev)) {
 276                 u32 temp = I915_READ(PEG_BAND_GAP_DATA);
 277                 I915_WRITE(PEG_BAND_GAP_DATA, (temp & ~0xf) | 0xd);
 278         }
 279
 280         return;
 281
 282 err_connector:
 283         drm_connector_cleanup(connector);
 284         kfree(intel_hdmi);
 285         kfree(intel_connector);
 286
 287         return;
 288 }