drivers/gpu/drm/i915/intel_modes.c

   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 <drm/drm_edid.h>
  29 #include <drm/drmP.h>
  30 #include "intel_drv.h"
  31 #include "i915_drv.h"
  32
  33 static void intel_connector_update_eld_conn_type(struct drm_connector *connector)
  34 {
  35         u8 conn_type;
  36
  37         if (connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort ||
  38             connector->connector_type == DRM_MODE_CONNECTOR_eDP) {
  39                 conn_type = DRM_ELD_CONN_TYPE_DP;
  40         } else {
  41                 conn_type = DRM_ELD_CONN_TYPE_HDMI;
  42         }
  43
  44         connector->eld[DRM_ELD_SAD_COUNT_CONN_TYPE] &= ~DRM_ELD_CONN_TYPE_MASK;
  45         connector->eld[DRM_ELD_SAD_COUNT_CONN_TYPE] |= conn_type;
  46 }
  47
  48 /**
  49  * intel_connector_update_modes - update connector from edid
  50  * @connector: DRM connector device to use
  51  * @edid: previously read EDID information
  52  */
  53 int intel_connector_update_modes(struct drm_connector *connector,
  54                                 struct edid *edid)
  55 {
  56         int ret;
  57
  58         drm_mode_connector_update_edid_property(connector, edid);
  59         ret = drm_add_edid_modes(connector, edid);
  60         drm_edid_to_eld(connector, edid);
  61
  62         intel_connector_update_eld_conn_type(connector);
  63
  64         return ret;
  65 }
  66
  67 /**
  68  * intel_ddc_get_modes - get modelist from monitor
  69  * @connector: DRM connector device to use
  70  * @adapter: i2c adapter
  71  *
  72  * Fetch the EDID information from @connector using the DDC bus.
  73  */
  74 int intel_ddc_get_modes(struct drm_connector *connector,
  75                         struct i2c_adapter *adapter)
  76 {
  77         struct edid *edid;
  78         int ret;
  79
  80         edid = drm_get_edid(connector, adapter);
  81         if (!edid)
  82                 return 0;
  83
  84         ret = intel_connector_update_modes(connector, edid);
  85         kfree(edid);
  86
  87         return ret;
  88 }
  89
  90 static const struct drm_prop_enum_list force_audio_names[] = {
  91         { HDMI_AUDIO_OFF_DVI, "force-dvi" },
  92         { HDMI_AUDIO_OFF, "off" },
  93         { HDMI_AUDIO_AUTO, "auto" },
  94         { HDMI_AUDIO_ON, "on" },
  95 };
  96
  97 void
  98 intel_attach_force_audio_property(struct drm_connector *connector)
  99 {
 100         struct drm_device *dev = connector->dev;
 101         struct drm_i915_private *dev_priv = to_i915(dev);
 102         struct drm_property *prop;
 103
 104         prop = dev_priv->force_audio_property;
 105         if (prop == NULL) {
 106                 prop = drm_property_create_enum(dev, 0,
 107                                            "audio",
 108                                            force_audio_names,
 109                                            ARRAY_SIZE(force_audio_names));
 110                 if (prop == NULL)
 111                         return;
 112
 113                 dev_priv->force_audio_property = prop;
 114         }
 115         drm_object_attach_property(&connector->base, prop, 0);
 116 }
 117
 118 static const struct drm_prop_enum_list broadcast_rgb_names[] = {
 119         { INTEL_BROADCAST_RGB_AUTO, "Automatic" },
 120         { INTEL_BROADCAST_RGB_FULL, "Full" },
 121         { INTEL_BROADCAST_RGB_LIMITED, "Limited 16:235" },
 122 };
 123
 124 void
 125 intel_attach_broadcast_rgb_property(struct drm_connector *connector)
 126 {
 127         struct drm_device *dev = connector->dev;
 128         struct drm_i915_private *dev_priv = to_i915(dev);
 129         struct drm_property *prop;
 130
 131         prop = dev_priv->broadcast_rgb_property;
 132         if (prop == NULL) {
 133                 prop = drm_property_create_enum(dev, DRM_MODE_PROP_ENUM,
 134                                            "Broadcast RGB",
 135                                            broadcast_rgb_names,
 136                                            ARRAY_SIZE(broadcast_rgb_names));
 137                 if (prop == NULL)
 138                         return;
 139
 140                 dev_priv->broadcast_rgb_property = prop;
 141         }
 142
 143         drm_object_attach_property(&connector->base, prop, 0);
 144 }
 145
 146 void
 147 intel_attach_aspect_ratio_property(struct drm_connector *connector)
 148 {
 149         if (!drm_mode_create_aspect_ratio_property(connector->dev))
 150                 drm_object_attach_property(&connector->base,
 151                         connector->dev->mode_config.aspect_ratio_property,
 152                         DRM_MODE_PICTURE_ASPECT_NONE);
 153 }