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(intel_gmbus_get_adapter(dev_priv, ddc_bus),
  60                             msgs, 2) == 2;
  61 }
  62
  63 /**
  64  * intel_ddc_get_modes - get modelist from monitor
  65  * @connector: DRM connector device to use
  66  * @adapter: i2c adapter
  67  *
  68  * Fetch the EDID information from @connector using the DDC bus.
  69  */
  70 int intel_ddc_get_modes(struct drm_connector *connector,
  71                         struct i2c_adapter *adapter)
  72 {
  73         struct edid *edid;
  74         int ret = 0;
  75
  76         edid = drm_get_edid(connector, adapter);
  77         if (edid) {
  78                 drm_mode_connector_update_edid_property(connector, edid);
  79                 ret = drm_add_edid_modes(connector, edid);
  80                 drm_edid_to_eld(connector, edid);
  81                 connector->display_info.raw_edid = NULL;
  82                 kfree(edid);
  83         }
  84
  85         return ret;
  86 }
  87
  88 static const struct drm_prop_enum_list force_audio_names[] = {
  89         { HDMI_AUDIO_OFF_DVI, "force-dvi" },
  90         { HDMI_AUDIO_OFF, "off" },
  91         { HDMI_AUDIO_AUTO, "auto" },
  92         { HDMI_AUDIO_ON, "on" },
  93 };
  94
  95 void
  96 intel_attach_force_audio_property(struct drm_connector *connector)
  97 {
  98         struct drm_device *dev = connector->dev;
  99         struct drm_i915_private *dev_priv = dev->dev_private;
 100         struct drm_property *prop;
 101
 102         prop = dev_priv->force_audio_property;
 103         if (prop == NULL) {
 104                 prop = drm_property_create_enum(dev, 0,
 105                                            "audio",
 106                                            force_audio_names,
 107                                            ARRAY_SIZE(force_audio_names));
 108                 if (prop == NULL)
 109                         return;
 110
 111                 dev_priv->force_audio_property = prop;
 112         }
 113         drm_connector_attach_property(connector, prop, 0);
 114 }
 115
 116 static const struct drm_prop_enum_list broadcast_rgb_names[] = {
 117         { 0, "Full" },
 118         { 1, "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
 128         prop = dev_priv->broadcast_rgb_property;
 129         if (prop == NULL) {
 130                 prop = drm_property_create_enum(dev, DRM_MODE_PROP_ENUM,
 131                                            "Broadcast RGB",
 132                                            broadcast_rgb_names,
 133                                            ARRAY_SIZE(broadcast_rgb_names));
 134                 if (prop == NULL)
 135                         return;
 136
 137                 dev_priv->broadcast_rgb_property = prop;
 138         }
 139
 140         drm_connector_attach_property(connector, prop, 0);
 141 }