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 "drmP.h"
  31 #include "intel_drv.h"
  32 #include "i915_drv.h"
  33
  34 /**
  35  * intel_ddc_probe
  36  *
  37  */
  38 bool intel_ddc_probe(struct intel_encoder *intel_encoder, int ddc_bus)
  39 {
  40         struct drm_i915_private *dev_priv = intel_encoder->base.dev->dev_private;
  41         u8 out_buf[] = { 0x0, 0x0};
  42         u8 buf[2];
  43         struct i2c_msg msgs[] = {
  44                 {
  45                         .addr = 0x50,
  46                         .flags = 0,
  47                         .len = 1,
  48                         .buf = out_buf,
  49                 },
  50                 {
  51                         .addr = 0x50,
  52                         .flags = I2C_M_RD,
  53                         .len = 1,
  54                         .buf = buf,
  55                 }
  56         };
  57
  58         return i2c_transfer(&dev_priv->gmbus[ddc_bus].adapter, msgs, 2) == 2;
  59 }
  60
  61 /**
  62  * intel_ddc_get_modes - get modelist from monitor
  63  * @connector: DRM connector device to use
  64  * @adapter: i2c adapter
  65  *
  66  * Fetch the EDID information from @connector using the DDC bus.
  67  */
  68 int intel_ddc_get_modes(struct drm_connector *connector,
  69                         struct i2c_adapter *adapter)
  70 {
  71         struct edid *edid;
  72         int ret = 0;
  73
  74         edid = drm_get_edid(connector, adapter);
  75         if (edid) {
  76                 drm_mode_connector_update_edid_property(connector, edid);
  77                 ret = drm_add_edid_modes(connector, edid);
  78                 drm_edid_to_eld(connector, edid);
  79                 connector->display_info.raw_edid = NULL;
  80                 kfree(edid);
  81         }
  82
  83         return ret;
  84 }
  85
  86 static const char *force_audio_names[] = {
  87         "off",
  88         "auto",
  89         "on",
  90 };
  91
  92 void
  93 intel_attach_force_audio_property(struct drm_connector *connector)
  94 {
  95         struct drm_device *dev = connector->dev;
  96         struct drm_i915_private *dev_priv = dev->dev_private;
  97         struct drm_property *prop;
  98         int i;
  99
 100         prop = dev_priv->force_audio_property;
 101         if (prop == NULL) {
 102                 prop = drm_property_create(dev, DRM_MODE_PROP_ENUM,
 103                                            "audio",
 104                                            ARRAY_SIZE(force_audio_names));
 105                 if (prop == NULL)
 106                         return;
 107
 108                 for (i = 0; i < ARRAY_SIZE(force_audio_names); i++)
 109                         drm_property_add_enum(prop, i, i-1, force_audio_names[i]);
 110
 111                 dev_priv->force_audio_property = prop;
 112         }
 113         drm_connector_attach_property(connector, prop, 0);
 114 }
 115
 116 static const char *broadcast_rgb_names[] = {
 117         "Full",
 118         "Limited 16:235",
 119 };
 120
 121 void
 122 intel_attach_broadcast_rgb_property(struct drm_connector *connector)
 123 {
 124         struct drm_device *dev = connector->dev;
 125         struct drm_i915_private *dev_priv = dev->dev_private;
 126         struct drm_property *prop;
 127         int i;
 128
 129         prop = dev_priv->broadcast_rgb_property;
 130         if (prop == NULL) {
 131                 prop = drm_property_create(dev, DRM_MODE_PROP_ENUM,
 132                                            "Broadcast RGB",
 133                                            ARRAY_SIZE(broadcast_rgb_names));
 134                 if (prop == NULL)
 135                         return;
 136
 137                 for (i = 0; i < ARRAY_SIZE(broadcast_rgb_names); i++)
 138                         drm_property_add_enum(prop, i, i, broadcast_rgb_names[i]);
 139
 140                 dev_priv->broadcast_rgb_property = prop;
 141         }
 142
 143         drm_connector_attach_property(connector, prop, 0);
 144 }