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 */
intel_ddc_probe(struct intel_encoder * intel_encoder,int ddc_bus)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 */
intel_ddc_get_modes(struct drm_connector * connector,struct i2c_adapter * adapter)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
intel_attach_force_audio_property(struct drm_connector * connector)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
intel_attach_broadcast_rgb_property(struct drm_connector * connector)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 }
145