1/* SPDX-License-Identifier: MIT */
2/*
3 * Copyright © 2023 Intel Corporation
4 */
5
6#ifndef __INTEL_DP_AUX_REGS_H__
7#define __INTEL_DP_AUX_REGS_H__
8
9#include "intel_display_reg_defs.h"
10
11/*
12 * The aux channel provides a way to talk to the signal sink for DDC etc. Max
13 * packet size supported is 20 bytes in each direction, hence the 5 fixed data
14 * registers
15 */
16
17/*
18 * Wrapper macro to convert from aux_ch to the index used in some of the
19 * registers.
20 */
21#define __xe2lpd_aux_ch_idx(aux_ch) \
22 (aux_ch >= AUX_CH_USBC1 ? aux_ch : AUX_CH_USBC4 + 1 + (aux_ch) - AUX_CH_A)
23
24#define _DPA_AUX_CH_CTL 0x64010
25#define _DPB_AUX_CH_CTL 0x64110
26#define DP_AUX_CH_CTL(aux_ch) _MMIO_PORT(aux_ch, _DPA_AUX_CH_CTL, \
27 _DPB_AUX_CH_CTL)
28#define VLV_DP_AUX_CH_CTL(aux_ch) _MMIO(VLV_DISPLAY_BASE + \
29 _PORT(aux_ch, _DPA_AUX_CH_CTL, _DPB_AUX_CH_CTL))
30
31#define _PCH_DPB_AUX_CH_CTL 0xe4110
32#define _PCH_DPC_AUX_CH_CTL 0xe4210
33#define PCH_DP_AUX_CH_CTL(aux_ch) _MMIO_PORT((aux_ch) - AUX_CH_B, _PCH_DPB_AUX_CH_CTL, _PCH_DPC_AUX_CH_CTL)
34
35#define _XELPDP_USBC1_AUX_CH_CTL 0x16f210
36#define _XELPDP_USBC2_AUX_CH_CTL 0x16f410
37#define _XELPDP_DP_AUX_CH_CTL(aux_ch) \
38 _MMIO(_PICK_EVEN_2RANGES(aux_ch, AUX_CH_USBC1, \
39 _DPA_AUX_CH_CTL, _DPB_AUX_CH_CTL, \
40 _XELPDP_USBC1_AUX_CH_CTL, \
41 _XELPDP_USBC2_AUX_CH_CTL))
42#define XELPDP_DP_AUX_CH_CTL(i915__, aux_ch) \
43 (DISPLAY_VER(i915__) >= 20 ? \
44 _XELPDP_DP_AUX_CH_CTL(__xe2lpd_aux_ch_idx(aux_ch)) : \
45 _XELPDP_DP_AUX_CH_CTL(aux_ch))
46#define DP_AUX_CH_CTL_SEND_BUSY REG_BIT(31)
47#define DP_AUX_CH_CTL_DONE REG_BIT(30)
48#define DP_AUX_CH_CTL_INTERRUPT REG_BIT(29)
49#define DP_AUX_CH_CTL_TIME_OUT_ERROR REG_BIT(28)
50#define DP_AUX_CH_CTL_TIME_OUT_MASK REG_GENMASK(27, 26)
51#define DP_AUX_CH_CTL_TIME_OUT_400us REG_FIELD_PREP(DP_AUX_CH_CTL_TIME_OUT_MASK, 0)
52#define DP_AUX_CH_CTL_TIME_OUT_600us REG_FIELD_PREP(DP_AUX_CH_CTL_TIME_OUT_MASK, 1)
53#define DP_AUX_CH_CTL_TIME_OUT_800us REG_FIELD_PREP(DP_AUX_CH_CTL_TIME_OUT_MASK, 2)
54#define DP_AUX_CH_CTL_TIME_OUT_MAX REG_FIELD_PREP(DP_AUX_CH_CTL_TIME_OUT_MASK, 3) /* Varies per platform */
55#define DP_AUX_CH_CTL_RECEIVE_ERROR REG_BIT(25)
56#define DP_AUX_CH_CTL_MESSAGE_SIZE_MASK REG_GENMASK(24, 20)
57#define DP_AUX_CH_CTL_MESSAGE_SIZE(x) REG_FIELD_PREP(DP_AUX_CH_CTL_MESSAGE_SIZE_MASK, (x))
58#define DP_AUX_CH_CTL_PRECHARGE_2US_MASK REG_GENMASK(19, 16) /* pre-skl */
59#define DP_AUX_CH_CTL_PRECHARGE_2US(x) REG_FIELD_PREP(DP_AUX_CH_CTL_PRECHARGE_2US_MASK, (x))
60#define XELPDP_DP_AUX_CH_CTL_POWER_REQUEST REG_BIT(19) /* mtl+ */
61#define XELPDP_DP_AUX_CH_CTL_POWER_STATUS REG_BIT(18) /* mtl+ */
62#define DP_AUX_CH_CTL_AUX_AKSV_SELECT REG_BIT(15)
63#define DP_AUX_CH_CTL_MANCHESTER_TEST REG_BIT(14) /* pre-hsw */
64#define DP_AUX_CH_CTL_PSR_DATA_AUX_REG_SKL REG_BIT(14) /* skl+ */
65#define DP_AUX_CH_CTL_SYNC_TEST REG_BIT(13) /* pre-hsw */
66#define DP_AUX_CH_CTL_FS_DATA_AUX_REG_SKL REG_BIT(13) /* skl+ */
67#define DP_AUX_CH_CTL_DEGLITCH_TEST REG_BIT(12) /* pre-hsw */
68#define DP_AUX_CH_CTL_GTC_DATA_AUX_REG_SKL REG_BIT(12) /* skl+ */
69#define DP_AUX_CH_CTL_PRECHARGE_TEST REG_BIT(11) /* pre-hsw */
70#define DP_AUX_CH_CTL_TBT_IO REG_BIT(11) /* icl+ */
71#define DP_AUX_CH_CTL_BIT_CLOCK_2X_MASK REG_GENMASK(10, 0) /* pre-skl */
72#define DP_AUX_CH_CTL_BIT_CLOCK_2X(x) REG_FIELD_PREP(DP_AUX_CH_CTL_BIT_CLOCK_2X_MASK, (x))
73#define DP_AUX_CH_CTL_FW_SYNC_PULSE_SKL_MASK REG_GENMASK(9, 5) /* skl+ */
74#define DP_AUX_CH_CTL_FW_SYNC_PULSE_SKL(c) REG_FIELD_PREP(DP_AUX_CH_CTL_FW_SYNC_PULSE_SKL_MASK, (c) - 1)
75#define DP_AUX_CH_CTL_SYNC_PULSE_SKL_MASK REG_GENMASK(4, 0) /* skl+ */
76#define DP_AUX_CH_CTL_SYNC_PULSE_SKL(c) REG_FIELD_PREP(DP_AUX_CH_CTL_SYNC_PULSE_SKL_MASK, (c) - 1)
77
78#define _DPA_AUX_CH_DATA1 0x64014
79#define _DPB_AUX_CH_DATA1 0x64114
80#define DP_AUX_CH_DATA(aux_ch, i) _MMIO(_PORT(aux_ch, _DPA_AUX_CH_DATA1, \
81 _DPB_AUX_CH_DATA1) + (i) * 4) /* 5 registers */
82#define VLV_DP_AUX_CH_DATA(aux_ch, i) _MMIO(VLV_DISPLAY_BASE + _PORT(aux_ch, _DPA_AUX_CH_DATA1, \
83 _DPB_AUX_CH_DATA1) + (i) * 4) /* 5 registers */
84
85#define _PCH_DPB_AUX_CH_DATA1 0xe4114
86#define _PCH_DPC_AUX_CH_DATA1 0xe4214
87#define PCH_DP_AUX_CH_DATA(aux_ch, i) _MMIO(_PORT((aux_ch) - AUX_CH_B, _PCH_DPB_AUX_CH_DATA1, _PCH_DPC_AUX_CH_DATA1) + (i) * 4) /* 5 registers */
88
89#define _XELPDP_USBC1_AUX_CH_DATA1 0x16f214
90#define _XELPDP_USBC2_AUX_CH_DATA1 0x16f414
91#define _XELPDP_DP_AUX_CH_DATA(aux_ch, i) \
92 _MMIO(_PICK_EVEN_2RANGES(aux_ch, AUX_CH_USBC1, \
93 _DPA_AUX_CH_DATA1, _DPB_AUX_CH_DATA1, \
94 _XELPDP_USBC1_AUX_CH_DATA1, \
95 _XELPDP_USBC2_AUX_CH_DATA1) + (i) * 4) /* 5 registers */
96#define XELPDP_DP_AUX_CH_DATA(i915__, aux_ch, i) \
97 (DISPLAY_VER(i915__) >= 20 ? \
98 _XELPDP_DP_AUX_CH_DATA(__xe2lpd_aux_ch_idx(aux_ch), i) : \
99 _XELPDP_DP_AUX_CH_DATA(aux_ch, i))
100
101/* PICA Power Well Control */
102#define XE2LPD_PICA_PW_CTL _MMIO(0x16fe04)
103#define XE2LPD_PICA_CTL_POWER_REQUEST REG_BIT(31)
104#define XE2LPD_PICA_CTL_POWER_STATUS REG_BIT(30)
105
106#endif /* __INTEL_DP_AUX_REGS_H__ */
107

source code of linux/drivers/gpu/drm/i915/display/intel_dp_aux_regs.h