1 | /* |
2 | * Copyright (c) 2015 NVIDIA Corporation. All rights reserved. |
3 | * |
4 | * Permission is hereby granted, free of charge, to any person obtaining a |
5 | * copy of this software and associated documentation files (the "Software"), |
6 | * to deal in the Software without restriction, including without limitation |
7 | * the rights to use, copy, modify, merge, publish, distribute, sub license, |
8 | * and/or sell copies of the Software, and to permit persons to whom the |
9 | * Software is furnished to do so, subject to the following conditions: |
10 | * |
11 | * The above copyright notice and this permission notice (including the |
12 | * next paragraph) shall be included in all copies or substantial portions |
13 | * of the Software. |
14 | * |
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL |
18 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
20 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
21 | * DEALINGS IN THE SOFTWARE. |
22 | */ |
23 | |
24 | #ifndef DRM_SCDC_HELPER_H |
25 | #define DRM_SCDC_HELPER_H |
26 | |
27 | #include <linux/types.h> |
28 | |
29 | #include <drm/display/drm_scdc.h> |
30 | |
31 | struct drm_connector; |
32 | struct i2c_adapter; |
33 | |
34 | ssize_t drm_scdc_read(struct i2c_adapter *adapter, u8 offset, void *buffer, |
35 | size_t size); |
36 | ssize_t drm_scdc_write(struct i2c_adapter *adapter, u8 offset, |
37 | const void *buffer, size_t size); |
38 | |
39 | /** |
40 | * drm_scdc_readb - read a single byte from SCDC |
41 | * @adapter: I2C adapter |
42 | * @offset: offset of register to read |
43 | * @value: return location for the register value |
44 | * |
45 | * Reads a single byte from SCDC. This is a convenience wrapper around the |
46 | * drm_scdc_read() function. |
47 | * |
48 | * Returns: |
49 | * 0 on success or a negative error code on failure. |
50 | */ |
51 | static inline int drm_scdc_readb(struct i2c_adapter *adapter, u8 offset, |
52 | u8 *value) |
53 | { |
54 | return drm_scdc_read(adapter, offset, buffer: value, size: sizeof(*value)); |
55 | } |
56 | |
57 | /** |
58 | * drm_scdc_writeb - write a single byte to SCDC |
59 | * @adapter: I2C adapter |
60 | * @offset: offset of register to read |
61 | * @value: return location for the register value |
62 | * |
63 | * Writes a single byte to SCDC. This is a convenience wrapper around the |
64 | * drm_scdc_write() function. |
65 | * |
66 | * Returns: |
67 | * 0 on success or a negative error code on failure. |
68 | */ |
69 | static inline int drm_scdc_writeb(struct i2c_adapter *adapter, u8 offset, |
70 | u8 value) |
71 | { |
72 | return drm_scdc_write(adapter, offset, buffer: &value, size: sizeof(value)); |
73 | } |
74 | |
75 | bool drm_scdc_get_scrambling_status(struct drm_connector *connector); |
76 | |
77 | bool drm_scdc_set_scrambling(struct drm_connector *connector, bool enable); |
78 | bool drm_scdc_set_high_tmds_clock_ratio(struct drm_connector *connector, bool set); |
79 | |
80 | #endif |
81 | |