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
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
|
/*
* Copyright (c) 2015 NVIDIA Corporation. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sub license,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#ifndef DRM_SCDC_HELPER_H
#define DRM_SCDC_HELPER_H
#include <linux/types.h>
#include <drm/display/drm_scdc.h>
struct i2c_adapter;
ssize_t drm_scdc_read(struct i2c_adapter *adapter, u8 offset, void *buffer,
size_t size);
ssize_t drm_scdc_write(struct i2c_adapter *adapter, u8 offset,
const void *buffer, size_t size);
/**
* drm_scdc_readb - read a single byte from SCDC
* @adapter: I2C adapter
* @offset: offset of register to read
* @value: return location for the register value
*
* Reads a single byte from SCDC. This is a convenience wrapper around the
* drm_scdc_read() function.
*
* Returns:
* 0 on success or a negative error code on failure.
*/
static inline int drm_scdc_readb(struct i2c_adapter *adapter, u8 offset,
u8 *value)
{
return drm_scdc_read(adapter, offset, value, sizeof(*value));
}
/**
* drm_scdc_writeb - write a single byte to SCDC
* @adapter: I2C adapter
* @offset: offset of register to read
* @value: return location for the register value
*
* Writes a single byte to SCDC. This is a convenience wrapper around the
* drm_scdc_write() function.
*
* Returns:
* 0 on success or a negative error code on failure.
*/
static inline int drm_scdc_writeb(struct i2c_adapter *adapter, u8 offset,
u8 value)
{
return drm_scdc_write(adapter, offset, &value, sizeof(value));
}
bool drm_scdc_get_scrambling_status(struct i2c_adapter *adapter);
bool drm_scdc_set_scrambling(struct i2c_adapter *adapter, bool enable);
bool drm_scdc_set_high_tmds_clock_ratio(struct i2c_adapter *adapter, bool set);
#endif
|
