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 */
39bool 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(&dev_priv->gmbus[ddc_bus].adapter, msgs, 2) == 2;
60}
61
62/**
63 * intel_ddc_get_modes - get modelist from monitor
64 * @connector: DRM connector device to use
65 * @adapter: i2c adapter
66 *
67 * Fetch the EDID information from @connector using the DDC bus.
68 */
69int intel_ddc_get_modes(struct drm_connector *connector,
70			struct i2c_adapter *adapter)
71{
72	struct edid *edid;
73	int ret = 0;
74
75	edid = drm_get_edid(connector, adapter);
76	if (edid) {
77		drm_mode_connector_update_edid_property(connector, edid);
78		ret = drm_add_edid_modes(connector, edid);
79		drm_edid_to_eld(connector, edid);
80		connector->display_info.raw_edid = NULL;
81		kfree(edid);
82	}
83
84	return ret;
85}
86
87static const struct drm_prop_enum_list force_audio_names[] = {
88	{ HDMI_AUDIO_OFF_DVI, "force-dvi" },
89	{ HDMI_AUDIO_OFF, "off" },
90	{ HDMI_AUDIO_AUTO, "auto" },
91	{ HDMI_AUDIO_ON, "on" },
92};
93
94void
95intel_attach_force_audio_property(struct drm_connector *connector)
96{
97	struct drm_device *dev = connector->dev;
98	struct drm_i915_private *dev_priv = dev->dev_private;
99	struct drm_property *prop;
100
101	prop = dev_priv->force_audio_property;
102	if (prop == NULL) {
103		prop = drm_property_create_enum(dev, 0,
104					   "audio",
105					   force_audio_names,
106					   ARRAY_SIZE(force_audio_names));
107		if (prop == NULL)
108			return;
109
110		dev_priv->force_audio_property = prop;
111	}
112	drm_connector_attach_property(connector, prop, 0);
113}
114
115static const struct drm_prop_enum_list broadcast_rgb_names[] = {
116	{ 0, "Full" },
117	{ 1, "Limited 16:235" },
118};
119
120void
121intel_attach_broadcast_rgb_property(struct drm_connector *connector)
122{
123	struct drm_device *dev = connector->dev;
124	struct drm_i915_private *dev_priv = dev->dev_private;
125	struct drm_property *prop;
126
127	prop = dev_priv->broadcast_rgb_property;
128	if (prop == NULL) {
129		prop = drm_property_create_enum(dev, DRM_MODE_PROP_ENUM,
130					   "Broadcast RGB",
131					   broadcast_rgb_names,
132					   ARRAY_SIZE(broadcast_rgb_names));
133		if (prop == NULL)
134			return;
135
136		dev_priv->broadcast_rgb_property = prop;
137	}
138
139	drm_connector_attach_property(connector, prop, 0);
140}
141