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 } 151