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  1. /*
  2.  * Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
  3.  * Copyright (c) 2007, 2010 Intel Corporation
  4.  *   Jesse Barnes <jesse.barnes@intel.com>
  5.  *
  6.  * Permission is hereby granted, free of charge, to any person obtaining a
  7.  * copy of this software and associated documentation files (the "Software"),
  8.  * to deal in the Software without restriction, including without limitation
  9.  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10.  * and/or sell copies of the Software, and to permit persons to whom the
  11.  * Software is furnished to do so, subject to the following conditions:
  12.  *
  13.  * The above copyright notice and this permission notice (including the next
  14.  * paragraph) shall be included in all copies or substantial portions of the
  15.  * Software.
  16.  *
  17.  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18.  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19.  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20.  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21.  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  22.  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  23.  * DEALINGS IN THE SOFTWARE.
  24.  */
  25.  
  26. #include <linux/slab.h>
  27. #include <linux/i2c.h>
  28. #include <linux/fb.h>
  29. #include "drmP.h"
  30. #include "intel_drv.h"
  31. #include "i915_drv.h"
  32.  
  33. /**
  34.  * intel_ddc_probe
  35.  *
  36.  */
  37. bool intel_ddc_probe(struct intel_encoder *intel_encoder, int ddc_bus)
  38. {
  39.         struct drm_i915_private *dev_priv = intel_encoder->base.dev->dev_private;
  40.         u8 out_buf[] = { 0x0, 0x0};
  41.         u8 buf[2];
  42.         struct i2c_msg msgs[] = {
  43.                 {
  44.                         .addr = 0x50,
  45.                         .flags = 0,
  46.                         .len = 1,
  47.                         .buf = out_buf,
  48.                 },
  49.                 {
  50.                         .addr = 0x50,
  51.                         .flags = I2C_M_RD,
  52.                         .len = 1,
  53.                         .buf = buf,
  54.                 }
  55.         };
  56.  
  57.         return i2c_transfer(&dev_priv->gmbus[ddc_bus].adapter, msgs, 2) == 2;
  58. }
  59.  
  60. /**
  61.  * intel_ddc_get_modes - get modelist from monitor
  62.  * @connector: DRM connector device to use
  63.  * @adapter: i2c adapter
  64.  *
  65.  * Fetch the EDID information from @connector using the DDC bus.
  66.  */
  67. int intel_ddc_get_modes(struct drm_connector *connector,
  68.                         struct i2c_adapter *adapter)
  69. {
  70.         struct edid *edid;
  71.         int ret = 0;
  72.  
  73.         edid = drm_get_edid(connector, adapter);
  74.         if (edid) {
  75.                 drm_mode_connector_update_edid_property(connector, edid);
  76.                 ret = drm_add_edid_modes(connector, edid);
  77.                 connector->display_info.raw_edid = NULL;
  78.                 kfree(edid);
  79.         }
  80.  
  81.         return ret;
  82. }
  83.  
  84. static const char *force_audio_names[] = {
  85.         "off",
  86.         "auto",
  87.         "on",
  88. };
  89.  
  90. void
  91. intel_attach_force_audio_property(struct drm_connector *connector)
  92. {
  93.         struct drm_device *dev = connector->dev;
  94.         struct drm_i915_private *dev_priv = dev->dev_private;
  95.         struct drm_property *prop;
  96.         int i;
  97. #if 0
  98.         prop = dev_priv->force_audio_property;
  99.         if (prop == NULL) {
  100.                 prop = drm_property_create(dev, DRM_MODE_PROP_ENUM,
  101.                                            "audio",
  102.                                            ARRAY_SIZE(force_audio_names));
  103.                 if (prop == NULL)
  104.                         return;
  105.  
  106.                 for (i = 0; i < ARRAY_SIZE(force_audio_names); i++)
  107.                         drm_property_add_enum(prop, i, i-1, force_audio_names[i]);
  108.  
  109.                 dev_priv->force_audio_property = prop;
  110.         }
  111.         drm_connector_attach_property(connector, prop, 0);
  112. #endif
  113. }
  114.  
  115. static const char *broadcast_rgb_names[] = {
  116.         "Full",
  117.         "Limited 16:235",
  118. };
  119.  
  120. void
  121. intel_attach_broadcast_rgb_property(struct drm_connector *connector)
  122. {
  123.         struct drm_device *dev = connector->dev;
  124.         struct drm_i915_private *dev_priv = dev->dev_private;
  125.         struct drm_property *prop;
  126.         int i;
  127. #if 0
  128.         prop = dev_priv->broadcast_rgb_property;
  129.         if (prop == NULL) {
  130.                 prop = drm_property_create(dev, DRM_MODE_PROP_ENUM,
  131.                                            "Broadcast RGB",
  132.                                            ARRAY_SIZE(broadcast_rgb_names));
  133.                 if (prop == NULL)
  134.                         return;
  135.  
  136.                 for (i = 0; i < ARRAY_SIZE(broadcast_rgb_names); i++)
  137.                         drm_property_add_enum(prop, i, i, broadcast_rgb_names[i]);
  138.  
  139.                 dev_priv->broadcast_rgb_property = prop;
  140.         }
  141.  
  142.         drm_connector_attach_property(connector, prop, 0);
  143. #endif
  144. }
  145.