blob: f70b7cf32bffc43a4325233e0ba11ab5726ce64f [file] [log] [blame]
Jesse Barnes79e53942008-11-07 14:24:08 -08001/*
2 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
Chris Wilsonf899fc62010-07-20 15:44:45 -07003 * Copyright (c) 2007, 2010 Intel Corporation
Jesse Barnes79e53942008-11-07 14:24:08 -08004 * 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
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090026#include <linux/slab.h>
Jesse Barnes79e53942008-11-07 14:24:08 -080027#include <linux/i2c.h>
28#include <linux/fb.h>
29#include "drmP.h"
30#include "intel_drv.h"
Shaohua Li0ba0e9e2009-04-07 11:02:28 +080031#include "i915_drv.h"
Jesse Barnes79e53942008-11-07 14:24:08 -080032
33/**
34 * intel_ddc_probe
35 *
36 */
Chris Wilsonf899fc62010-07-20 15:44:45 -070037bool intel_ddc_probe(struct intel_encoder *intel_encoder, int ddc_bus)
Jesse Barnes79e53942008-11-07 14:24:08 -080038{
Chris Wilsonf899fc62010-07-20 15:44:45 -070039 struct drm_i915_private *dev_priv = intel_encoder->base.dev->dev_private;
Jesse Barnes79e53942008-11-07 14:24:08 -080040 u8 out_buf[] = { 0x0, 0x0};
41 u8 buf[2];
Jesse Barnes79e53942008-11-07 14:24:08 -080042 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
Chris Wilsonf899fc62010-07-20 15:44:45 -070057 return i2c_transfer(&dev_priv->gmbus[ddc_bus].adapter, msgs, 2) == 2;
Jesse Barnes79e53942008-11-07 14:24:08 -080058}
59
60/**
61 * intel_ddc_get_modes - get modelist from monitor
62 * @connector: DRM connector device to use
Zhenyu Wang335af9a2010-03-30 14:39:31 +080063 * @adapter: i2c adapter
Jesse Barnes79e53942008-11-07 14:24:08 -080064 *
65 * Fetch the EDID information from @connector using the DDC bus.
66 */
Zhenyu Wang335af9a2010-03-30 14:39:31 +080067int intel_ddc_get_modes(struct drm_connector *connector,
68 struct i2c_adapter *adapter)
Jesse Barnes79e53942008-11-07 14:24:08 -080069{
70 struct edid *edid;
71 int ret = 0;
72
Zhenyu Wang335af9a2010-03-30 14:39:31 +080073 edid = drm_get_edid(connector, adapter);
Jesse Barnes79e53942008-11-07 14:24:08 -080074 if (edid) {
Zhenyu Wang335af9a2010-03-30 14:39:31 +080075 drm_mode_connector_update_edid_property(connector, edid);
76 ret = drm_add_edid_modes(connector, edid);
77 connector->display_info.raw_edid = NULL;
Jesse Barnes79e53942008-11-07 14:24:08 -080078 kfree(edid);
79 }
80
81 return ret;
82}