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