blob: 67e2f4632a2451fd77200e0f9810a18c83afca1d [file] [log] [blame]
Jesse Barnes79e53942008-11-07 14:24:08 -08001/*
2 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
3 * Copyright (c) 2007 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/i2c.h>
27#include <linux/fb.h>
28#include "drmP.h"
29#include "intel_drv.h"
Shaohua Li0ba0e9e2009-04-07 11:02:28 +080030#include "i915_drv.h"
Jesse Barnes79e53942008-11-07 14:24:08 -080031
32/**
33 * intel_ddc_probe
34 *
35 */
36bool intel_ddc_probe(struct intel_output *intel_output)
37{
38 u8 out_buf[] = { 0x0, 0x0};
39 u8 buf[2];
40 int ret;
41 struct i2c_msg msgs[] = {
42 {
43 .addr = 0x50,
44 .flags = 0,
45 .len = 1,
46 .buf = out_buf,
47 },
48 {
49 .addr = 0x50,
50 .flags = I2C_M_RD,
51 .len = 1,
52 .buf = buf,
53 }
54 };
55
Keith Packardf9c10a92009-05-30 12:16:25 -070056 intel_i2c_quirk_set(intel_output->base.dev, true);
57 ret = i2c_transfer(intel_output->ddc_bus, msgs, 2);
58 intel_i2c_quirk_set(intel_output->base.dev, false);
Jesse Barnes79e53942008-11-07 14:24:08 -080059 if (ret == 2)
60 return true;
61
62 return false;
63}
64
65/**
66 * intel_ddc_get_modes - get modelist from monitor
67 * @connector: DRM connector device to use
68 *
69 * Fetch the EDID information from @connector using the DDC bus.
70 */
71int intel_ddc_get_modes(struct intel_output *intel_output)
72{
73 struct edid *edid;
74 int ret = 0;
75
Keith Packardf9c10a92009-05-30 12:16:25 -070076 intel_i2c_quirk_set(intel_output->base.dev, true);
77 edid = drm_get_edid(&intel_output->base, intel_output->ddc_bus);
78 intel_i2c_quirk_set(intel_output->base.dev, false);
Jesse Barnes79e53942008-11-07 14:24:08 -080079 if (edid) {
80 drm_mode_connector_update_edid_property(&intel_output->base,
81 edid);
82 ret = drm_add_edid_modes(&intel_output->base, edid);
Ma Ling6b731a62009-03-11 18:18:29 +080083 intel_output->base.display_info.raw_edid = NULL;
Jesse Barnes79e53942008-11-07 14:24:08 -080084 kfree(edid);
85 }
86
87 return ret;
88}