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