1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
|
/*
* Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
* Copyright (c) 2007 Intel Corporation
* Jesse Barnes <jesse.barnes@intel.com>
*/
#include <linux/i2c.h>
#include <linux/fb.h>
#include "drmP.h"
#include "intel_drv.h"
/**
* intel_ddc_probe
*
*/
bool intel_ddc_probe(struct intel_output *intel_output)
{
u8 out_buf[] = { 0x0, 0x0};
u8 buf[2];
int ret;
struct i2c_msg msgs[] = {
{
.addr = 0x50,
.flags = 0,
.len = 1,
.buf = out_buf,
},
{
.addr = 0x50,
.flags = I2C_M_RD,
.len = 1,
.buf = buf,
}
};
ret = i2c_transfer(&intel_output->ddc_bus->adapter, msgs, 2);
if (ret == 2)
return true;
return false;
}
/**
* intel_ddc_get_modes - get modelist from monitor
* @connector: DRM connector device to use
*
* Fetch the EDID information from @connector using the DDC bus.
*/
int intel_ddc_get_modes(struct intel_output *intel_output)
{
struct edid *edid;
int ret = 0;
edid = drm_get_edid(&intel_output->base, &intel_output->ddc_bus->adapter);
if (edid) {
drm_mode_connector_update_edid_property(&intel_output->base, edid);
ret = drm_add_edid_modes(&intel_output->base, edid);
kfree(edid);
}
return ret;
}
|
