1/*
2 * Copyright 2021 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#include "amdgpu_dm_psr.h"
27#include "dc_dmub_srv.h"
28#include "dc.h"
29#include "dm_helpers.h"
30#include "amdgpu_dm.h"
31#include "modules/power/power_helpers.h"
32
33static bool link_supports_psrsu(struct dc_link *link)
34{
35 struct dc *dc = link->ctx->dc;
36
37 if (!dc->caps.dmcub_support)
38 return false;
39
40 if (dc->ctx->dce_version < DCN_VERSION_3_1)
41 return false;
42
43 if (!is_psr_su_specific_panel(link))
44 return false;
45
46 if (!link->dpcd_caps.alpm_caps.bits.AUX_WAKE_ALPM_CAP ||
47 !link->dpcd_caps.psr_info.psr_dpcd_caps.bits.Y_COORDINATE_REQUIRED)
48 return false;
49
50 if (link->dpcd_caps.psr_info.psr_dpcd_caps.bits.SU_GRANULARITY_REQUIRED &&
51 !link->dpcd_caps.psr_info.psr2_su_y_granularity_cap)
52 return false;
53
54 return dc_dmub_check_min_version(srv: dc->ctx->dmub_srv->dmub);
55}
56
57/*
58 * amdgpu_dm_set_psr_caps() - set link psr capabilities
59 * @link: link
60 *
61 */
62void amdgpu_dm_set_psr_caps(struct dc_link *link)
63{
64 if (!(link->connector_signal & SIGNAL_TYPE_EDP)) {
65 link->psr_settings.psr_feature_enabled = false;
66 return;
67 }
68
69 if (link->type == dc_connection_none) {
70 link->psr_settings.psr_feature_enabled = false;
71 return;
72 }
73
74 if (link->dpcd_caps.psr_info.psr_version == 0) {
75 link->psr_settings.psr_version = DC_PSR_VERSION_UNSUPPORTED;
76 link->psr_settings.psr_feature_enabled = false;
77
78 } else {
79 if (link_supports_psrsu(link))
80 link->psr_settings.psr_version = DC_PSR_VERSION_SU_1;
81 else
82 link->psr_settings.psr_version = DC_PSR_VERSION_1;
83
84 link->psr_settings.psr_feature_enabled = true;
85 }
86
87 DRM_INFO("PSR support %d, DC PSR ver %d, sink PSR ver %d DPCD caps 0x%x su_y_granularity %d\n",
88 link->psr_settings.psr_feature_enabled,
89 link->psr_settings.psr_version,
90 link->dpcd_caps.psr_info.psr_version,
91 link->dpcd_caps.psr_info.psr_dpcd_caps.raw,
92 link->dpcd_caps.psr_info.psr2_su_y_granularity_cap);
93
94}
95
96/*
97 * amdgpu_dm_link_setup_psr() - configure psr link
98 * @stream: stream state
99 *
100 * Return: true if success
101 */
102bool amdgpu_dm_link_setup_psr(struct dc_stream_state *stream)
103{
104 struct dc_link *link = NULL;
105 struct psr_config psr_config = {0};
106 struct psr_context psr_context = {0};
107 struct dc *dc = NULL;
108 bool ret = false;
109
110 if (stream == NULL)
111 return false;
112
113 link = stream->link;
114 dc = link->ctx->dc;
115
116 if (link->psr_settings.psr_version != DC_PSR_VERSION_UNSUPPORTED) {
117 mod_power_calc_psr_configs(psr_config: &psr_config, link, stream);
118
119 /* linux DM specific updating for psr config fields */
120 psr_config.allow_smu_optimizations =
121 (amdgpu_dc_feature_mask & DC_PSR_ALLOW_SMU_OPT) &&
122 mod_power_only_edp(context: dc->current_state, stream);
123 psr_config.allow_multi_disp_optimizations =
124 (amdgpu_dc_feature_mask & DC_PSR_ALLOW_MULTI_DISP_OPT);
125
126 if (!psr_su_set_dsc_slice_height(dc, link, stream, config: &psr_config))
127 return false;
128
129 ret = dc_link_setup_psr(dc_link: link, stream, psr_config: &psr_config, psr_context: &psr_context);
130
131 }
132 DRM_DEBUG_DRIVER("PSR link: %d\n", link->psr_settings.psr_feature_enabled);
133
134 return ret;
135}
136
137/*
138 * amdgpu_dm_psr_enable() - enable psr f/w
139 * @stream: stream state
140 *
141 * Return: true if success
142 */
143bool amdgpu_dm_psr_enable(struct dc_stream_state *stream)
144{
145 struct dc_link *link = stream->link;
146 unsigned int vsync_rate_hz = 0;
147 struct dc_static_screen_params params = {0};
148 /* Calculate number of static frames before generating interrupt to
149 * enter PSR.
150 */
151 // Init fail safe of 2 frames static
152 unsigned int num_frames_static = 2;
153 unsigned int power_opt = 0;
154 bool psr_enable = true;
155
156 DRM_DEBUG_DRIVER("Enabling psr...\n");
157
158 vsync_rate_hz = div64_u64(dividend: div64_u64(dividend: (
159 stream->timing.pix_clk_100hz * 100),
160 divisor: stream->timing.v_total),
161 divisor: stream->timing.h_total);
162
163 /* Round up
164 * Calculate number of frames such that at least 30 ms of time has
165 * passed.
166 */
167 if (vsync_rate_hz != 0) {
168 unsigned int frame_time_microsec = 1000000 / vsync_rate_hz;
169
170 num_frames_static = (30000 / frame_time_microsec) + 1;
171 }
172
173 params.triggers.cursor_update = true;
174 params.triggers.overlay_update = true;
175 params.triggers.surface_update = true;
176 params.num_frames = num_frames_static;
177
178 dc_stream_set_static_screen_params(dc: link->ctx->dc,
179 stream: &stream, num_streams: 1,
180 params: &params);
181
182 /*
183 * Only enable static-screen optimizations for PSR1. For PSR SU, this
184 * causes vstartup interrupt issues, used by amdgpu_dm to send vblank
185 * events.
186 */
187 if (link->psr_settings.psr_version < DC_PSR_VERSION_SU_1)
188 power_opt |= psr_power_opt_z10_static_screen;
189
190 return dc_link_set_psr_allow_active(dc_link: link, enable: &psr_enable, wait: false, force_static: false, power_opts: &power_opt);
191}
192
193/*
194 * amdgpu_dm_psr_disable() - disable psr f/w
195 * @stream: stream state
196 *
197 * Return: true if success
198 */
199bool amdgpu_dm_psr_disable(struct dc_stream_state *stream)
200{
201 unsigned int power_opt = 0;
202 bool psr_enable = false;
203
204 DRM_DEBUG_DRIVER("Disabling psr...\n");
205
206 return dc_link_set_psr_allow_active(dc_link: stream->link, enable: &psr_enable, wait: true, force_static: false, power_opts: &power_opt);
207}
208
209/*
210 * amdgpu_dm_psr_disable() - disable psr f/w
211 * if psr is enabled on any stream
212 *
213 * Return: true if success
214 */
215bool amdgpu_dm_psr_disable_all(struct amdgpu_display_manager *dm)
216{
217 DRM_DEBUG_DRIVER("Disabling psr if psr is enabled on any stream\n");
218 return dc_set_psr_allow_active(dc: dm->dc, enable: false);
219}
220
221

source code of linux/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_psr.c