1 | /* |
2 | * Copyright © 2016 Intel Corporation |
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, sublicense, |
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 shall be included in |
12 | * all copies or substantial portions of the Software. |
13 | * |
14 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
15 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
16 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
17 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR |
18 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
19 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
20 | * OTHER DEALINGS IN THE SOFTWARE. |
21 | */ |
22 | |
23 | #ifndef DRM_DP_DUAL_MODE_HELPER_H |
24 | #define DRM_DP_DUAL_MODE_HELPER_H |
25 | |
26 | #include <linux/types.h> |
27 | |
28 | /* |
29 | * Optional for type 1 DVI adaptors |
30 | * Mandatory for type 1 HDMI and type 2 adaptors |
31 | */ |
32 | #define DP_DUAL_MODE_HDMI_ID 0x00 /* 00-0f */ |
33 | #define DP_DUAL_MODE_HDMI_ID_LEN 16 |
34 | /* |
35 | * Optional for type 1 adaptors |
36 | * Mandatory for type 2 adaptors |
37 | */ |
38 | #define DP_DUAL_MODE_ADAPTOR_ID 0x10 |
39 | #define DP_DUAL_MODE_REV_MASK 0x07 |
40 | #define DP_DUAL_MODE_REV_TYPE2 0x00 |
41 | #define DP_DUAL_MODE_TYPE_MASK 0xf0 |
42 | #define DP_DUAL_MODE_TYPE_TYPE2 0xa0 |
43 | /* This field is marked reserved in dual mode spec, used in LSPCON */ |
44 | #define DP_DUAL_MODE_TYPE_HAS_DPCD 0x08 |
45 | #define DP_DUAL_MODE_IEEE_OUI 0x11 /* 11-13*/ |
46 | #define DP_DUAL_IEEE_OUI_LEN 3 |
47 | #define DP_DUAL_DEVICE_ID 0x14 /* 14-19 */ |
48 | #define DP_DUAL_DEVICE_ID_LEN 6 |
49 | #define DP_DUAL_MODE_HARDWARE_REV 0x1a |
50 | #define DP_DUAL_MODE_FIRMWARE_MAJOR_REV 0x1b |
51 | #define DP_DUAL_MODE_FIRMWARE_MINOR_REV 0x1c |
52 | #define DP_DUAL_MODE_MAX_TMDS_CLOCK 0x1d |
53 | #define DP_DUAL_MODE_I2C_SPEED_CAP 0x1e |
54 | #define DP_DUAL_MODE_TMDS_OEN 0x20 |
55 | #define DP_DUAL_MODE_TMDS_DISABLE 0x01 |
56 | #define DP_DUAL_MODE_HDMI_PIN_CTRL 0x21 |
57 | #define DP_DUAL_MODE_CEC_ENABLE 0x01 |
58 | #define DP_DUAL_MODE_I2C_SPEED_CTRL 0x22 |
59 | |
60 | /* LSPCON specific registers, defined by MCA */ |
61 | #define DP_DUAL_MODE_LSPCON_MODE_CHANGE 0x40 |
62 | #define DP_DUAL_MODE_LSPCON_CURRENT_MODE 0x41 |
63 | #define DP_DUAL_MODE_LSPCON_MODE_PCON 0x1 |
64 | |
65 | struct drm_device; |
66 | struct i2c_adapter; |
67 | |
68 | ssize_t drm_dp_dual_mode_read(struct i2c_adapter *adapter, |
69 | u8 offset, void *buffer, size_t size); |
70 | ssize_t drm_dp_dual_mode_write(struct i2c_adapter *adapter, |
71 | u8 offset, const void *buffer, size_t size); |
72 | |
73 | /** |
74 | * enum drm_lspcon_mode |
75 | * @DRM_LSPCON_MODE_INVALID: No LSPCON. |
76 | * @DRM_LSPCON_MODE_LS: Level shifter mode of LSPCON |
77 | * which drives DP++ to HDMI 1.4 conversion. |
78 | * @DRM_LSPCON_MODE_PCON: Protocol converter mode of LSPCON |
79 | * which drives DP++ to HDMI 2.0 active conversion. |
80 | */ |
81 | enum drm_lspcon_mode { |
82 | DRM_LSPCON_MODE_INVALID, |
83 | DRM_LSPCON_MODE_LS, |
84 | DRM_LSPCON_MODE_PCON, |
85 | }; |
86 | |
87 | /** |
88 | * enum drm_dp_dual_mode_type - Type of the DP dual mode adaptor |
89 | * @DRM_DP_DUAL_MODE_NONE: No DP dual mode adaptor |
90 | * @DRM_DP_DUAL_MODE_UNKNOWN: Could be either none or type 1 DVI adaptor |
91 | * @DRM_DP_DUAL_MODE_TYPE1_DVI: Type 1 DVI adaptor |
92 | * @DRM_DP_DUAL_MODE_TYPE1_HDMI: Type 1 HDMI adaptor |
93 | * @DRM_DP_DUAL_MODE_TYPE2_DVI: Type 2 DVI adaptor |
94 | * @DRM_DP_DUAL_MODE_TYPE2_HDMI: Type 2 HDMI adaptor |
95 | * @DRM_DP_DUAL_MODE_LSPCON: Level shifter / protocol converter |
96 | */ |
97 | enum drm_dp_dual_mode_type { |
98 | DRM_DP_DUAL_MODE_NONE, |
99 | DRM_DP_DUAL_MODE_UNKNOWN, |
100 | DRM_DP_DUAL_MODE_TYPE1_DVI, |
101 | DRM_DP_DUAL_MODE_TYPE1_HDMI, |
102 | DRM_DP_DUAL_MODE_TYPE2_DVI, |
103 | DRM_DP_DUAL_MODE_TYPE2_HDMI, |
104 | DRM_DP_DUAL_MODE_LSPCON, |
105 | }; |
106 | |
107 | enum drm_dp_dual_mode_type |
108 | drm_dp_dual_mode_detect(const struct drm_device *dev, struct i2c_adapter *adapter); |
109 | int drm_dp_dual_mode_max_tmds_clock(const struct drm_device *dev, enum drm_dp_dual_mode_type type, |
110 | struct i2c_adapter *adapter); |
111 | int drm_dp_dual_mode_get_tmds_output(const struct drm_device *dev, enum drm_dp_dual_mode_type type, |
112 | struct i2c_adapter *adapter, bool *enabled); |
113 | int drm_dp_dual_mode_set_tmds_output(const struct drm_device *dev, enum drm_dp_dual_mode_type type, |
114 | struct i2c_adapter *adapter, bool enable); |
115 | const char *drm_dp_get_dual_mode_type_name(enum drm_dp_dual_mode_type type); |
116 | |
117 | int drm_lspcon_get_mode(const struct drm_device *dev, struct i2c_adapter *adapter, |
118 | enum drm_lspcon_mode *current_mode); |
119 | int drm_lspcon_set_mode(const struct drm_device *dev, struct i2c_adapter *adapter, |
120 | enum drm_lspcon_mode reqd_mode); |
121 | #endif |
122 | |