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 "drmP.h"
30 #include "intel_drv.h"
31 #include "i915_drv.h"
32
33 /**
34 * intel_ddc_probe
35 *
36 */
intel_ddc_probe(struct intel_encoder * intel_encoder,int ddc_bus)37 bool intel_ddc_probe(struct intel_encoder *intel_encoder, int ddc_bus)
38 {
39 struct drm_i915_private *dev_priv = intel_encoder->base.dev->dev_private;
40 u8 out_buf[] = { 0x0, 0x0};
41 u8 buf[2];
42 struct i2c_msg msgs[] = {
43 {
44 .addr = 0x50,
45 .flags = 0,
46 .len = 1,
47 .buf = out_buf,
48 },
49 {
50 .addr = 0x50,
51 .flags = I2C_M_RD,
52 .len = 1,
53 .buf = buf,
54 }
55 };
56
57 return i2c_transfer(&dev_priv->gmbus[ddc_bus].adapter, msgs, 2) == 2;
58 }
59
60 /**
61 * intel_ddc_get_modes - get modelist from monitor
62 * @connector: DRM connector device to use
63 * @adapter: i2c adapter
64 *
65 * Fetch the EDID information from @connector using the DDC bus.
66 */
intel_ddc_get_modes(struct drm_connector * connector,struct i2c_adapter * adapter)67 int intel_ddc_get_modes(struct drm_connector *connector,
68 struct i2c_adapter *adapter)
69 {
70 struct edid *edid;
71 int ret = 0;
72
73 edid = drm_get_edid(connector, adapter);
74 if (edid) {
75 drm_mode_connector_update_edid_property(connector, edid);
76 ret = drm_add_edid_modes(connector, edid);
77 connector->display_info.raw_edid = NULL;
78 kfree(edid);
79 }
80
81 return ret;
82 }
83
84 static const char *broadcast_rgb_names[] = {
85 "Full",
86 "Limited 16:235",
87 };
88
89 void
intel_attach_broadcast_rgb_property(struct drm_connector * connector)90 intel_attach_broadcast_rgb_property(struct drm_connector *connector)
91 {
92 struct drm_device *dev = connector->dev;
93 struct drm_i915_private *dev_priv = dev->dev_private;
94 struct drm_property *prop;
95 int i;
96
97 prop = dev_priv->broadcast_rgb_property;
98 if (prop == NULL) {
99 prop = drm_property_create(dev, DRM_MODE_PROP_ENUM,
100 "Broadcast RGB",
101 ARRAY_SIZE(broadcast_rgb_names));
102 if (prop == NULL)
103 return;
104
105 for (i = 0; i < ARRAY_SIZE(broadcast_rgb_names); i++)
106 drm_property_add_enum(prop, i, i, broadcast_rgb_names[i]);
107
108 dev_priv->broadcast_rgb_property = prop;
109 }
110
111 drm_connector_attach_property(connector, prop, 0);
112 }
113