2 * Copyright © 2008 Keith Packard
4 * Permission to use, copy, modify, distribute, and sell this software and its
5 * documentation for any purpose is hereby granted without fee, provided that
6 * the above copyright notice appear in all copies and that both that copyright
7 * notice and this permission notice appear in supporting documentation, and
8 * that the name of the copyright holders not be used in advertising or
9 * publicity pertaining to distribution of the software without specific,
10 * written prior permission. The copyright holders make no representations
11 * about the suitability of this software for any purpose. It is provided "as
12 * is" without express or implied warranty.
14 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
15 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
16 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
17 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
18 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
19 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
26 /* From the VESA DisplayPort spec */
28 #define AUX_NATIVE_WRITE 0x8
29 #define AUX_NATIVE_READ 0x9
30 #define AUX_I2C_WRITE 0x0
31 #define AUX_I2C_READ 0x1
32 #define AUX_I2C_STATUS 0x2
33 #define AUX_I2C_MOT 0x4
35 #define AUX_NATIVE_REPLY_ACK (0x0 << 4)
36 #define AUX_NATIVE_REPLY_NACK (0x1 << 4)
37 #define AUX_NATIVE_REPLY_DEFER (0x2 << 4)
38 #define AUX_NATIVE_REPLY_MASK (0x3 << 4)
40 #define AUX_I2C_REPLY_ACK (0x0 << 6)
41 #define AUX_I2C_REPLY_NACK (0x1 << 6)
42 #define AUX_I2C_REPLY_DEFER (0x2 << 6)
43 #define AUX_I2C_REPLY_MASK (0x3 << 6)
45 /* AUX CH addresses */
46 #define DP_LINK_BW_SET 0x100
47 # define DP_LINK_BW_1_62 0x06
48 # define DP_LINK_BW_2_7 0x0a
50 #define DP_LANE_COUNT_SET 0x101
51 # define DP_LANE_COUNT_MASK 0x0f
52 # define DP_LANE_COUNT_ENHANCED_FRAME_EN (1 << 7)
54 #define DP_TRAINING_PATTERN_SET 0x102
56 # define DP_TRAINING_PATTERN_DISABLE 0
57 # define DP_TRAINING_PATTERN_1 1
58 # define DP_TRAINING_PATTERN_2 2
59 # define DP_TRAINING_PATTERN_MASK 0x3
61 # define DP_LINK_QUAL_PATTERN_DISABLE (0 << 2)
62 # define DP_LINK_QUAL_PATTERN_D10_2 (1 << 2)
63 # define DP_LINK_QUAL_PATTERN_ERROR_RATE (2 << 2)
64 # define DP_LINK_QUAL_PATTERN_PRBS7 (3 << 2)
65 # define DP_LINK_QUAL_PATTERN_MASK (3 << 2)
67 # define DP_RECOVERED_CLOCK_OUT_EN (1 << 4)
68 # define DP_LINK_SCRAMBLING_DISABLE (1 << 5)
70 # define DP_SYMBOL_ERROR_COUNT_BOTH (0 << 6)
71 # define DP_SYMBOL_ERROR_COUNT_DISPARITY (1 << 6)
72 # define DP_SYMBOL_ERROR_COUNT_SYMBOL (2 << 6)
73 # define DP_SYMBOL_ERROR_COUNT_MASK (3 << 6)
75 #define DP_TRAINING_LANE0_SET 0x103
76 #define DP_TRAINING_LANE1_SET 0x104
77 #define DP_TRAINING_LANE2_SET 0x105
78 #define DP_TRAINING_LANE3_SET 0x106
80 # define DP_TRAIN_VOLTAGE_SWING_MASK 0x3
81 # define DP_TRAIN_VOLTAGE_SWING_SHIFT 0
82 # define DP_TRAIN_MAX_SWING_REACHED (1 << 2)
83 # define DP_TRAIN_VOLTAGE_SWING_400 (0 << 0)
84 # define DP_TRAIN_VOLTAGE_SWING_600 (1 << 0)
85 # define DP_TRAIN_VOLTAGE_SWING_800 (2 << 0)
86 # define DP_TRAIN_VOLTAGE_SWING_1200 (3 << 0)
88 # define DP_TRAIN_PRE_EMPHASIS_MASK (3 << 3)
89 # define DP_TRAIN_PRE_EMPHASIS_0 (0 << 3)
90 # define DP_TRAIN_PRE_EMPHASIS_3_5 (1 << 3)
91 # define DP_TRAIN_PRE_EMPHASIS_6 (2 << 3)
92 # define DP_TRAIN_PRE_EMPHASIS_9_5 (3 << 3)
94 # define DP_TRAIN_PRE_EMPHASIS_SHIFT 3
95 # define DP_TRAIN_MAX_PRE_EMPHASIS_REACHED (1 << 5)
97 #define DP_DOWNSPREAD_CTRL 0x107
98 # define DP_SPREAD_AMP_0_5 (1 << 4)
100 #define DP_MAIN_LINK_CHANNEL_CODING_SET 0x108
101 # define DP_SET_ANSI_8B10B (1 << 0)
103 #define DP_LANE0_1_STATUS 0x202
104 #define DP_LANE2_3_STATUS 0x203
106 # define DP_LANE_CR_DONE (1 << 0)
107 # define DP_LANE_CHANNEL_EQ_DONE (1 << 1)
108 # define DP_LANE_SYMBOL_LOCKED (1 << 2)
110 #define DP_LANE_ALIGN_STATUS_UPDATED 0x204
112 #define DP_INTERLANE_ALIGN_DONE (1 << 0)
113 #define DP_DOWNSTREAM_PORT_STATUS_CHANGED (1 << 6)
114 #define DP_LINK_STATUS_UPDATED (1 << 7)
116 #define DP_SINK_STATUS 0x205
118 #define DP_RECEIVE_PORT_0_STATUS (1 << 0)
119 #define DP_RECEIVE_PORT_1_STATUS (1 << 1)
121 #define DP_ADJUST_REQUEST_LANE0_1 0x206
122 #define DP_ADJUST_REQUEST_LANE2_3 0x207
124 #define DP_ADJUST_VOLTAGE_SWING_LANE0_MASK 0x03
125 #define DP_ADJUST_VOLTAGE_SWING_LANE0_SHIFT 0
126 #define DP_ADJUST_PRE_EMPHASIS_LANE0_MASK 0x0c
127 #define DP_ADJUST_PRE_EMPHASIS_LANE0_SHIFT 2
128 #define DP_ADJUST_VOLTAGE_SWING_LANE1_MASK 0x30
129 #define DP_ADJUST_VOLTAGE_SWING_LANE1_SHIFT 4
130 #define DP_ADJUST_PRE_EMPHASIS_LANE1_MASK 0xc0
131 #define DP_ADJUST_PRE_EMPHASIS_LANE1_SHIFT 6
133 struct i2c_algo_dp_aux_data {
136 int (*aux_ch) (struct i2c_adapter *adapter,
137 uint8_t *send, int send_bytes,
138 uint8_t *recv, int recv_bytes);
142 i2c_dp_aux_add_bus(struct i2c_adapter *adapter);
144 #endif /* _INTEL_DP_H_ */