1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
2 | /* |
3 | * Copyright (c) 2012-2020, The Linux Foundation. All rights reserved. |
4 | */ |
5 | |
6 | #ifndef _DP_LINK_H_ |
7 | #define _DP_LINK_H_ |
8 | |
9 | #include "dp_aux.h" |
10 | |
11 | #define DS_PORT_STATUS_CHANGED 0x200 |
12 | #define DP_TEST_BIT_DEPTH_UNKNOWN 0xFFFFFFFF |
13 | #define DP_LINK_CAP_ENHANCED_FRAMING (1 << 0) |
14 | |
15 | struct dp_link_info { |
16 | unsigned char revision; |
17 | unsigned int rate; |
18 | unsigned int num_lanes; |
19 | unsigned long capabilities; |
20 | }; |
21 | |
22 | enum dp_link_voltage_level { |
23 | DP_TRAIN_VOLTAGE_SWING_LVL_0 = 0, |
24 | DP_TRAIN_VOLTAGE_SWING_LVL_1 = 1, |
25 | DP_TRAIN_VOLTAGE_SWING_LVL_2 = 2, |
26 | DP_TRAIN_VOLTAGE_SWING_MAX = DP_TRAIN_VOLTAGE_SWING_LVL_2, |
27 | }; |
28 | |
29 | enum dp_link_preemaphasis_level { |
30 | DP_TRAIN_PRE_EMPHASIS_LVL_0 = 0, |
31 | DP_TRAIN_PRE_EMPHASIS_LVL_1 = 1, |
32 | DP_TRAIN_PRE_EMPHASIS_LVL_2 = 2, |
33 | DP_TRAIN_PRE_EMPHASIS_MAX = DP_TRAIN_PRE_EMPHASIS_LVL_2, |
34 | }; |
35 | |
36 | struct dp_link_test_video { |
37 | u32 test_video_pattern; |
38 | u32 test_bit_depth; |
39 | u32 test_dyn_range; |
40 | u32 test_h_total; |
41 | u32 test_v_total; |
42 | u32 test_h_start; |
43 | u32 test_v_start; |
44 | u32 test_hsync_pol; |
45 | u32 test_hsync_width; |
46 | u32 test_vsync_pol; |
47 | u32 test_vsync_width; |
48 | u32 test_h_width; |
49 | u32 test_v_height; |
50 | u32 test_rr_d; |
51 | u32 test_rr_n; |
52 | }; |
53 | |
54 | struct dp_link_test_audio { |
55 | u32 test_audio_sampling_rate; |
56 | u32 test_audio_channel_count; |
57 | u32 test_audio_pattern_type; |
58 | u32 test_audio_period_ch_1; |
59 | u32 test_audio_period_ch_2; |
60 | u32 test_audio_period_ch_3; |
61 | u32 test_audio_period_ch_4; |
62 | u32 test_audio_period_ch_5; |
63 | u32 test_audio_period_ch_6; |
64 | u32 test_audio_period_ch_7; |
65 | u32 test_audio_period_ch_8; |
66 | }; |
67 | |
68 | struct dp_link_phy_params { |
69 | u32 phy_test_pattern_sel; |
70 | u8 v_level; |
71 | u8 p_level; |
72 | }; |
73 | |
74 | struct dp_link { |
75 | u32 sink_request; |
76 | u32 test_response; |
77 | bool psm_enabled; |
78 | |
79 | u8 sink_count; |
80 | struct dp_link_test_video test_video; |
81 | struct dp_link_test_audio test_audio; |
82 | struct dp_link_phy_params phy_params; |
83 | struct dp_link_info link_params; |
84 | }; |
85 | |
86 | /** |
87 | * mdss_dp_test_bit_depth_to_bpp() - convert test bit depth to bpp |
88 | * @tbd: test bit depth |
89 | * |
90 | * Returns the bits per pixel (bpp) to be used corresponding to the |
91 | * git bit depth value. This function assumes that bit depth has |
92 | * already been validated. |
93 | */ |
94 | static inline u32 dp_link_bit_depth_to_bpp(u32 tbd) |
95 | { |
96 | /* |
97 | * Few simplistic rules and assumptions made here: |
98 | * 1. Bit depth is per color component |
99 | * 2. If bit depth is unknown return 0 |
100 | * 3. Assume 3 color components |
101 | */ |
102 | switch (tbd) { |
103 | case DP_TEST_BIT_DEPTH_6: |
104 | return 18; |
105 | case DP_TEST_BIT_DEPTH_8: |
106 | return 24; |
107 | case DP_TEST_BIT_DEPTH_10: |
108 | return 30; |
109 | case DP_TEST_BIT_DEPTH_UNKNOWN: |
110 | default: |
111 | return 0; |
112 | } |
113 | } |
114 | |
115 | void dp_link_reset_phy_params_vx_px(struct dp_link *dp_link); |
116 | u32 dp_link_get_test_bits_depth(struct dp_link *dp_link, u32 bpp); |
117 | int dp_link_process_request(struct dp_link *dp_link); |
118 | int dp_link_get_colorimetry_config(struct dp_link *dp_link); |
119 | int dp_link_adjust_levels(struct dp_link *dp_link, u8 *link_status); |
120 | bool dp_link_send_test_response(struct dp_link *dp_link); |
121 | int dp_link_psm_config(struct dp_link *dp_link, |
122 | struct dp_link_info *link_info, bool enable); |
123 | bool dp_link_send_edid_checksum(struct dp_link *dp_link, u8 checksum); |
124 | |
125 | /** |
126 | * dp_link_get() - get the functionalities of dp test module |
127 | * |
128 | * |
129 | * return: a pointer to dp_link struct |
130 | */ |
131 | struct dp_link *dp_link_get(struct device *dev, struct drm_dp_aux *aux); |
132 | |
133 | #endif /* _DP_LINK_H_ */ |
134 | |