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 */
 37bool 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 */
 67int 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
 84static const char *force_audio_names[] = {
 85	"off",
 86	"auto",
 87	"on",
 88};
 89
 90void
 91intel_attach_force_audio_property(struct drm_connector *connector)
 92{
 93	struct drm_device *dev = connector->dev;
 94	struct drm_i915_private *dev_priv = dev->dev_private;
 95	struct drm_property *prop;
 96	int i;
 97
 98	prop = dev_priv->force_audio_property;
 99	if (prop == NULL) {
100		prop = drm_property_create(dev, DRM_MODE_PROP_ENUM,
101					   "audio",
102					   ARRAY_SIZE(force_audio_names));
103		if (prop == NULL)
104			return;
105
106		for (i = 0; i < ARRAY_SIZE(force_audio_names); i++)
107			drm_property_add_enum(prop, i, i-1, force_audio_names[i]);
108
109		dev_priv->force_audio_property = prop;
110	}
111	drm_connector_attach_property(connector, prop, 0);
112}
113
114static const char *broadcast_rgb_names[] = {
115	"Full",
116	"Limited 16:235",
117};
118
119void
120intel_attach_broadcast_rgb_property(struct drm_connector *connector)
121{
122	struct drm_device *dev = connector->dev;
123	struct drm_i915_private *dev_priv = dev->dev_private;
124	struct drm_property *prop;
125	int i;
126
127	prop = dev_priv->broadcast_rgb_property;
128	if (prop == NULL) {
129		prop = drm_property_create(dev, DRM_MODE_PROP_ENUM,
130					   "Broadcast RGB",
131					   ARRAY_SIZE(broadcast_rgb_names));
132		if (prop == NULL)
133			return;
134
135		for (i = 0; i < ARRAY_SIZE(broadcast_rgb_names); i++)
136			drm_property_add_enum(prop, i, i, broadcast_rgb_names[i]);
137
138		dev_priv->broadcast_rgb_property = prop;
139	}
140
141	drm_connector_attach_property(connector, prop, 0);
142}