1/*
2 * Copyright 2019 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
27#include "dc_bios_types.h"
28#include "hw_shared.h"
29#include "dcn31_apg.h"
30#include "reg_helper.h"
31
32#define DC_LOGGER \
33 apg31->base.ctx->logger
34
35#define REG(reg)\
36 (apg31->regs->reg)
37
38#undef FN
39#define FN(reg_name, field_name) \
40 apg31->apg_shift->field_name, apg31->apg_mask->field_name
41
42
43#define CTX \
44 apg31->base.ctx
45
46
47static void apg31_enable(
48 struct apg *apg)
49{
50 struct dcn31_apg *apg31 = DCN31_APG_FROM_APG(apg);
51
52 /* Reset APG */
53 REG_UPDATE(APG_CONTROL, APG_RESET, 1);
54 REG_WAIT(APG_CONTROL,
55 APG_RESET_DONE, 1,
56 1, 10);
57 REG_UPDATE(APG_CONTROL, APG_RESET, 0);
58 REG_WAIT(APG_CONTROL,
59 APG_RESET_DONE, 0,
60 1, 10);
61
62 /* Enable APG */
63 REG_UPDATE(APG_CONTROL2, APG_ENABLE, 1);
64}
65
66static void apg31_disable(
67 struct apg *apg)
68{
69 struct dcn31_apg *apg31 = DCN31_APG_FROM_APG(apg);
70
71 /* Disable APG */
72 REG_UPDATE(APG_CONTROL2, APG_ENABLE, 0);
73}
74
75static void apg31_se_audio_setup(
76 struct apg *apg,
77 unsigned int az_inst,
78 struct audio_info *audio_info)
79{
80 struct dcn31_apg *apg31 = DCN31_APG_FROM_APG(apg);
81
82 ASSERT(audio_info);
83 /* This should not happen.it does so we don't get BSOD*/
84 if (audio_info == NULL)
85 return;
86
87 /* DisplayPort only allows for one audio stream with stream ID 0 */
88 REG_UPDATE(APG_CONTROL2, APG_DP_AUDIO_STREAM_ID, 0);
89
90 /* When running in "pair mode", pairs of audio channels have their own enable
91 * this is for really old audio drivers */
92 REG_UPDATE(APG_DBG_GEN_CONTROL, APG_DBG_AUDIO_CHANNEL_ENABLE, 0xFF);
93
94 /* Disable forced mem power off */
95 REG_UPDATE(APG_MEM_PWR, APG_MEM_PWR_FORCE, 0);
96}
97
98static struct apg_funcs dcn31_apg_funcs = {
99 .se_audio_setup = apg31_se_audio_setup,
100 .enable_apg = apg31_enable,
101 .disable_apg = apg31_disable,
102};
103
104void apg31_construct(struct dcn31_apg *apg31,
105 struct dc_context *ctx,
106 uint32_t inst,
107 const struct dcn31_apg_registers *apg_regs,
108 const struct dcn31_apg_shift *apg_shift,
109 const struct dcn31_apg_mask *apg_mask)
110{
111 apg31->base.ctx = ctx;
112
113 apg31->base.inst = inst;
114 apg31->base.funcs = &dcn31_apg_funcs;
115
116 apg31->regs = apg_regs;
117 apg31->apg_shift = apg_shift;
118 apg31->apg_mask = apg_mask;
119}
120

source code of linux/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_apg.c