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79e53945 JB |
1 | /* |
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" | |
30 | ||
31 | /** | |
32 | * intel_ddc_probe | |
33 | * | |
34 | */ | |
35 | bool intel_ddc_probe(struct intel_output *intel_output) | |
36 | { | |
37 | u8 out_buf[] = { 0x0, 0x0}; | |
38 | u8 buf[2]; | |
39 | int ret; | |
40 | struct i2c_msg msgs[] = { | |
41 | { | |
42 | .addr = 0x50, | |
43 | .flags = 0, | |
44 | .len = 1, | |
45 | .buf = out_buf, | |
46 | }, | |
47 | { | |
48 | .addr = 0x50, | |
49 | .flags = I2C_M_RD, | |
50 | .len = 1, | |
51 | .buf = buf, | |
52 | } | |
53 | }; | |
54 | ||
55 | ret = i2c_transfer(&intel_output->ddc_bus->adapter, msgs, 2); | |
56 | if (ret == 2) | |
57 | return true; | |
58 | ||
59 | return false; | |
60 | } | |
61 | ||
62 | /** | |
63 | * intel_ddc_get_modes - get modelist from monitor | |
64 | * @connector: DRM connector device to use | |
65 | * | |
66 | * Fetch the EDID information from @connector using the DDC bus. | |
67 | */ | |
68 | int intel_ddc_get_modes(struct intel_output *intel_output) | |
69 | { | |
70 | struct edid *edid; | |
71 | int ret = 0; | |
72 | ||
73 | edid = drm_get_edid(&intel_output->base, | |
74 | &intel_output->ddc_bus->adapter); | |
75 | if (edid) { | |
76 | drm_mode_connector_update_edid_property(&intel_output->base, | |
77 | edid); | |
78 | ret = drm_add_edid_modes(&intel_output->base, edid); | |
6b731a65 | 79 | intel_output->base.display_info.raw_edid = NULL; |
79e53945 JB |
80 | kfree(edid); |
81 | } | |
82 | ||
83 | return ret; | |
84 | } |