1/*
2 * Copyright 2012-15 Advanced Micro Devices, Inc.
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 * Authors: AMD
23 *
24 */
25
26#ifndef __DC_SIGNAL_TYPES_H__
27#define __DC_SIGNAL_TYPES_H__
28
29/* Minimum pixel clock, in KHz. For TMDS signal is 25.00 MHz */
30#define TMDS_MIN_PIXEL_CLOCK 25000
31/* Maximum pixel clock, in KHz. For TMDS signal is 165.00 MHz */
32#define TMDS_MAX_PIXEL_CLOCK 165000
33
34enum signal_type {
35 SIGNAL_TYPE_NONE = 0L, /* no signal */
36 SIGNAL_TYPE_DVI_SINGLE_LINK = (1 << 0),
37 SIGNAL_TYPE_DVI_DUAL_LINK = (1 << 1),
38 SIGNAL_TYPE_HDMI_TYPE_A = (1 << 2),
39 SIGNAL_TYPE_LVDS = (1 << 3),
40 SIGNAL_TYPE_RGB = (1 << 4),
41 SIGNAL_TYPE_DISPLAY_PORT = (1 << 5),
42 SIGNAL_TYPE_DISPLAY_PORT_MST = (1 << 6),
43 SIGNAL_TYPE_EDP = (1 << 7),
44 SIGNAL_TYPE_VIRTUAL = (1 << 9), /* Virtual Display */
45};
46
47static inline const char *signal_type_to_string(const int type)
48{
49 switch (type) {
50 case SIGNAL_TYPE_NONE:
51 return "No signal";
52 case SIGNAL_TYPE_DVI_SINGLE_LINK:
53 return "DVI: Single Link";
54 case SIGNAL_TYPE_DVI_DUAL_LINK:
55 return "DVI: Dual Link";
56 case SIGNAL_TYPE_HDMI_TYPE_A:
57 return "HDMI: TYPE A";
58 case SIGNAL_TYPE_LVDS:
59 return "LVDS";
60 case SIGNAL_TYPE_RGB:
61 return "RGB";
62 case SIGNAL_TYPE_DISPLAY_PORT:
63 return "Display Port";
64 case SIGNAL_TYPE_DISPLAY_PORT_MST:
65 return "Display Port: MST";
66 case SIGNAL_TYPE_EDP:
67 return "Embedded Display Port";
68 case SIGNAL_TYPE_VIRTUAL:
69 return "Virtual";
70 default:
71 return "Unknown";
72 }
73}
74
75/* help functions for signal types manipulation */
76static inline bool dc_is_hdmi_tmds_signal(enum signal_type signal)
77{
78 return (signal == SIGNAL_TYPE_HDMI_TYPE_A);
79}
80
81static inline bool dc_is_hdmi_signal(enum signal_type signal)
82{
83 return (signal == SIGNAL_TYPE_HDMI_TYPE_A);
84}
85
86static inline bool dc_is_dp_sst_signal(enum signal_type signal)
87{
88 return (signal == SIGNAL_TYPE_DISPLAY_PORT ||
89 signal == SIGNAL_TYPE_EDP);
90}
91
92static inline bool dc_is_dp_signal(enum signal_type signal)
93{
94 return (signal == SIGNAL_TYPE_DISPLAY_PORT ||
95 signal == SIGNAL_TYPE_EDP ||
96 signal == SIGNAL_TYPE_DISPLAY_PORT_MST);
97}
98
99static inline bool dc_is_embedded_signal(enum signal_type signal)
100{
101 return (signal == SIGNAL_TYPE_EDP || signal == SIGNAL_TYPE_LVDS);
102}
103
104static inline bool dc_is_lvds_signal(enum signal_type signal)
105{
106 return (signal == SIGNAL_TYPE_LVDS);
107}
108
109static inline bool dc_is_dvi_signal(enum signal_type signal)
110{
111 switch (signal) {
112 case SIGNAL_TYPE_DVI_SINGLE_LINK:
113 case SIGNAL_TYPE_DVI_DUAL_LINK:
114 return true;
115 break;
116 default:
117 return false;
118 }
119}
120
121/**
122 * dc_is_rgb_signal() - Whether the signal is analog RGB.
123 *
124 * Returns whether the given signal type is an analog RGB signal
125 * that is used with a DAC on VGA or DVI-I connectors.
126 * Not to be confused with other uses of "RGB", such as RGB color space.
127 */
128static inline bool dc_is_rgb_signal(enum signal_type signal)
129{
130 return (signal == SIGNAL_TYPE_RGB);
131}
132
133static inline bool dc_is_tmds_signal(enum signal_type signal)
134{
135 switch (signal) {
136 case SIGNAL_TYPE_DVI_SINGLE_LINK:
137 case SIGNAL_TYPE_DVI_DUAL_LINK:
138 case SIGNAL_TYPE_HDMI_TYPE_A:
139 return true;
140 break;
141 default:
142 return false;
143 }
144}
145
146static inline bool dc_is_dvi_single_link_signal(enum signal_type signal)
147{
148 return (signal == SIGNAL_TYPE_DVI_SINGLE_LINK);
149}
150
151static inline bool dc_is_dual_link_signal(enum signal_type signal)
152{
153 return (signal == SIGNAL_TYPE_DVI_DUAL_LINK);
154}
155
156static inline bool dc_is_audio_capable_signal(enum signal_type signal)
157{
158 return (signal == SIGNAL_TYPE_DISPLAY_PORT ||
159 signal == SIGNAL_TYPE_DISPLAY_PORT_MST ||
160 dc_is_hdmi_signal(signal));
161}
162
163static inline bool dc_is_virtual_signal(enum signal_type signal)
164{
165 return (signal == SIGNAL_TYPE_VIRTUAL);
166}
167
168#endif
169

source code of linux/drivers/gpu/drm/amd/display/include/signal_types.h