sys/dev/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/i2c.h>
  27 #include <drm/drmP.h>
  28 #include <drm/drm_edid.h>
  29 #include "intel_drv.h"
  30 #include "i915_drv.h"
  31 #include <bus/iicbus/iiconf.h>
  32
  33 bool intel_ddc_probe(struct intel_encoder *intel_encoder, int ddc_bus)
  34 {
  35         struct drm_i915_private *dev_priv = intel_encoder->base.dev->dev_private;
  36         u8 out_buf[] = { 0x0, 0x0};
  37         u8 buf[2];
  38         struct iic_msg msgs[] = {
  39                 {
  40                         .slave = DDC_ADDR << 1,
  41                         .flags = IIC_M_WR,
  42                         .len = 1,
  43                         .buf = out_buf,
  44                 },
  45                 {
  46                         .slave = DDC_ADDR << 1,
  47                         .flags = IIC_M_RD,
  48                         .len = 1,
  49                         .buf = buf,
  50                 }
  51         };
  52
  53         return (iicbus_transfer(dev_priv->gmbus[ddc_bus], msgs, 2)
  54             == 0/* XXXKIB  2*/);
  55 }
  56
  57 /**
  58  * intel_connector_update_modes - update connector from edid
  59  * @connector: DRM connector device to use
  60  * @edid: previously read EDID information
  61  */
  62 int intel_connector_update_modes(struct drm_connector *connector,
  63                                 struct edid *edid)
  64 {
  65         int ret;
  66
  67         drm_mode_connector_update_edid_property(connector, edid);
  68         ret = drm_add_edid_modes(connector, edid);
  69         drm_edid_to_eld(connector, edid);
  70
  71         return ret;
  72 }
  73
  74 /**
  75  * intel_ddc_get_modes - get modelist from monitor
  76  * @connector: DRM connector device to use
  77  * @adapter: i2c adapter
  78  *
  79  * Fetch the EDID information from @connector using the DDC bus.
  80  */
  81 int intel_ddc_get_modes(struct drm_connector *connector,
  82                         device_t adapter)
  83 {
  84         struct edid *edid;
  85         int ret;
  86
  87         edid = drm_get_edid(connector, adapter);
  88         if (!edid)
  89                 return 0;
  90
  91         ret = intel_connector_update_modes(connector, edid);
  92         kfree(edid, DRM_MEM_KMS);
  93
  94         return ret;
  95 }
  96
  97 static const struct drm_prop_enum_list force_audio_names[] = {
  98         { HDMI_AUDIO_OFF_DVI, "force-dvi" },
  99         { HDMI_AUDIO_OFF, "off" },
 100         { HDMI_AUDIO_AUTO, "auto" },
 101         { HDMI_AUDIO_ON, "on" },
 102 };
 103
 104 void
 105 intel_attach_force_audio_property(struct drm_connector *connector)
 106 {
 107         struct drm_device *dev = connector->dev;
 108         struct drm_i915_private *dev_priv = dev->dev_private;
 109         struct drm_property *prop;
 110
 111         prop = dev_priv->force_audio_property;
 112         if (prop == NULL) {
 113                 prop = drm_property_create_enum(dev, 0,
 114                                            "audio",
 115                                            force_audio_names,
 116                                            ARRAY_SIZE(force_audio_names));
 117                 if (prop == NULL)
 118                         return;
 119
 120                 dev_priv->force_audio_property = prop;
 121         }
 122         drm_object_attach_property(&connector->base, prop, 0);
 123 }
 124
 125 static const struct drm_prop_enum_list broadcast_rgb_names[] = {
 126         { 0, "Full" },
 127         { 1, "Limited 16:235" },
 128 };
 129
 130 void
 131 intel_attach_broadcast_rgb_property(struct drm_connector *connector)
 132 {
 133         struct drm_device *dev = connector->dev;
 134         struct drm_i915_private *dev_priv = dev->dev_private;
 135         struct drm_property *prop;
 136
 137         prop = dev_priv->broadcast_rgb_property;
 138         if (prop == NULL) {
 139                 prop = drm_property_create_enum(dev, DRM_MODE_PROP_ENUM,
 140                                            "Broadcast RGB",
 141                                            broadcast_rgb_names,
 142                                            ARRAY_SIZE(broadcast_rgb_names));
 143                 if (prop == NULL)
 144                         return;
 145
 146                 dev_priv->broadcast_rgb_property = prop;
 147         }
 148
 149         drm_object_attach_property(&connector->base, prop, 0);
 150 }