1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 * Copyright (c) 2007 Intel Corporation
 4 *
 5 * Authers: Jesse Barnes <jesse.barnes@intel.com>
 6 */
 7
 8#include <linux/i2c.h>
 9
10#include <drm/drm_edid.h>
11
12#include "psb_intel_drv.h"
13
14/**
15 * psb_intel_ddc_probe
16 * @adapter:   Associated I2C adaptor
17 */
18bool psb_intel_ddc_probe(struct i2c_adapter *adapter)
19{
20	u8 out_buf[] = { 0x0, 0x0 };
21	u8 buf[2];
22	int ret;
23	struct i2c_msg msgs[] = {
24		{
25		 .addr = 0x50,
26		 .flags = 0,
27		 .len = 1,
28		 .buf = out_buf,
29		 },
30		{
31		 .addr = 0x50,
32		 .flags = I2C_M_RD,
33		 .len = 1,
34		 .buf = buf,
35		 }
36	};
37
38	ret = i2c_transfer(adapter, msgs, 2);
39	if (ret == 2)
40		return true;
41
42	return false;
43}
44
45/**
46 * psb_intel_ddc_get_modes - get modelist from monitor
47 * @connector: DRM connector device to use
48 * @adapter:   Associated I2C adaptor
49 *
50 * Fetch the EDID information from @connector using the DDC bus.
51 */
52int psb_intel_ddc_get_modes(struct drm_connector *connector,
53			    struct i2c_adapter *adapter)
54{
55	struct edid *edid;
56	int ret = 0;
57
58	edid = drm_get_edid(connector, adapter);
59	if (edid) {
60		drm_connector_update_edid_property(connector, edid);
61		ret = drm_add_edid_modes(connector, edid);
62		kfree(edid);
63	}
64	return ret;
65}

 1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 * Copyright (c) 2007 Intel Corporation
 4 *
 5 * Authers: Jesse Barnes <jesse.barnes@intel.com>
 6 */
 7
 8#include <linux/i2c.h>
 9
 
 
10#include "psb_intel_drv.h"
11
12/**
13 * psb_intel_ddc_probe
14 * @adapter:   Associated I2C adaptor
15 */
16bool psb_intel_ddc_probe(struct i2c_adapter *adapter)
17{
18	u8 out_buf[] = { 0x0, 0x0 };
19	u8 buf[2];
20	int ret;
21	struct i2c_msg msgs[] = {
22		{
23		 .addr = 0x50,
24		 .flags = 0,
25		 .len = 1,
26		 .buf = out_buf,
27		 },
28		{
29		 .addr = 0x50,
30		 .flags = I2C_M_RD,
31		 .len = 1,
32		 .buf = buf,
33		 }
34	};
35
36	ret = i2c_transfer(adapter, msgs, 2);
37	if (ret == 2)
38		return true;
39
40	return false;
41}
42
43/**
44 * psb_intel_ddc_get_modes - get modelist from monitor
45 * @connector: DRM connector device to use
46 * @adapter:   Associated I2C adaptor
47 *
48 * Fetch the EDID information from @connector using the DDC bus.
49 */
50int psb_intel_ddc_get_modes(struct drm_connector *connector,
51			    struct i2c_adapter *adapter)
52{
53	struct edid *edid;
54	int ret = 0;
55
56	edid = drm_get_edid(connector, adapter);
57	if (edid) {
58		drm_connector_update_edid_property(connector, edid);
59		ret = drm_add_edid_modes(connector, edid);
60		kfree(edid);
61	}
62	return ret;
63}