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