drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_psr.c

   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
  33 static 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         if (amdgpu_dc_debug_mask & DC_DISABLE_PSR_SU)
  55                 return false;
  56
  57         return dc_dmub_check_min_version(dc->ctx->dmub_srv->dmub);
  58 }
  59
  60 /*
  61  * amdgpu_dm_set_psr_caps() - set link psr capabilities
  62  * @link: link
  63  *
  64  */
  65 void amdgpu_dm_set_psr_caps(struct dc_link *link)
  66 {
  67         if (!(link->connector_signal & SIGNAL_TYPE_EDP)) {
  68                 link->psr_settings.psr_feature_enabled = false;
  69                 return;
  70         }
  71
  72         if (link->type == dc_connection_none) {
  73                 link->psr_settings.psr_feature_enabled = false;
  74                 return;
  75         }
  76
  77         if (link->dpcd_caps.psr_info.psr_version == 0) {
  78                 link->psr_settings.psr_version = DC_PSR_VERSION_UNSUPPORTED;
  79                 link->psr_settings.psr_feature_enabled = false;
  80
  81         } else {
  82                 if (link_supports_psrsu(link))
  83                         link->psr_settings.psr_version = DC_PSR_VERSION_SU_1;
  84                 else
  85                         link->psr_settings.psr_version = DC_PSR_VERSION_1;
  86
  87                 link->psr_settings.psr_feature_enabled = true;
  88         }
  89
  90         DRM_INFO("PSR support %d, DC PSR ver %d, sink PSR ver %d DPCD caps 0x%x su_y_granularity %d\n",
  91                 link->psr_settings.psr_feature_enabled,
  92                 link->psr_settings.psr_version,
  93                 link->dpcd_caps.psr_info.psr_version,
  94                 link->dpcd_caps.psr_info.psr_dpcd_caps.raw,
  95                 link->dpcd_caps.psr_info.psr2_su_y_granularity_cap);
  96
  97 }
  98
  99 /*
 100  * amdgpu_dm_link_setup_psr() - configure psr link
 101  * @stream: stream state
 102  *
 103  * Return: true if success
 104  */
 105 bool amdgpu_dm_link_setup_psr(struct dc_stream_state *stream)
 106 {
 107         struct dc_link *link = NULL;
 108         struct psr_config psr_config = {0};
 109         struct psr_context psr_context = {0};
 110         struct dc *dc = NULL;
 111         bool ret = false;
 112
 113         if (stream == NULL)
 114                 return false;
 115
 116         link = stream->link;
 117         dc = link->ctx->dc;
 118
 119         if (link->psr_settings.psr_version != DC_PSR_VERSION_UNSUPPORTED) {
 120                 mod_power_calc_psr_configs(&psr_config, link, stream);
 121
 122                 /* linux DM specific updating for psr config fields */
 123                 psr_config.allow_smu_optimizations =
 124                         (amdgpu_dc_feature_mask & DC_PSR_ALLOW_SMU_OPT) &&
 125                         mod_power_only_edp(dc->current_state, stream);
 126                 psr_config.allow_multi_disp_optimizations =
 127                         (amdgpu_dc_feature_mask & DC_PSR_ALLOW_MULTI_DISP_OPT);
 128
 129                 if (!psr_su_set_dsc_slice_height(dc, link, stream, &psr_config))
 130                         return false;
 131
 132                 ret = dc_link_setup_psr(link, stream, &psr_config, &psr_context);
 133
 134         }
 135         DRM_DEBUG_DRIVER("PSR link: %d\n",      link->psr_settings.psr_feature_enabled);
 136
 137         return ret;
 138 }
 139
 140 /*
 141  * amdgpu_dm_psr_enable() - enable psr f/w
 142  * @stream: stream state
 143  *
 144  */
 145 void amdgpu_dm_psr_enable(struct dc_stream_state *stream)
 146 {
 147         struct dc_link *link = stream->link;
 148         unsigned int vsync_rate_hz = 0;
 149         struct dc_static_screen_params params = {0};
 150         /* Calculate number of static frames before generating interrupt to
 151          * enter PSR.
 152          */
 153         // Init fail safe of 2 frames static
 154         unsigned int num_frames_static = 2;
 155         unsigned int power_opt = 0;
 156         bool psr_enable = true;
 157
 158         DRM_DEBUG_DRIVER("Enabling psr...\n");
 159
 160         vsync_rate_hz = div64_u64(div64_u64((
 161                         stream->timing.pix_clk_100hz * 100),
 162                         stream->timing.v_total),
 163                         stream->timing.h_total);
 164
 165         /* Round up
 166          * Calculate number of frames such that at least 30 ms of time has
 167          * passed.
 168          */
 169         if (vsync_rate_hz != 0) {
 170                 unsigned int frame_time_microsec = 1000000 / vsync_rate_hz;
 171
 172                 num_frames_static = (30000 / frame_time_microsec) + 1;
 173         }
 174
 175         params.triggers.cursor_update = true;
 176         params.triggers.overlay_update = true;
 177         params.triggers.surface_update = true;
 178         params.num_frames = num_frames_static;
 179
 180         dc_stream_set_static_screen_params(link->ctx->dc,
 181                                            &stream, 1,
 182                                            &params);
 183
 184         /*
 185          * Only enable static-screen optimizations for PSR1. For PSR SU, this
 186          * causes vstartup interrupt issues, used by amdgpu_dm to send vblank
 187          * events.
 188          */
 189         if (link->psr_settings.psr_version < DC_PSR_VERSION_SU_1)
 190                 power_opt |= psr_power_opt_z10_static_screen;
 191
 192         dc_link_set_psr_allow_active(link, &psr_enable, false, false, &power_opt);
 193
 194         if (link->ctx->dc->caps.ips_support)
 195                 dc_allow_idle_optimizations(link->ctx->dc, true);
 196 }
 197
 198 /*
 199  * amdgpu_dm_psr_disable() - disable psr f/w
 200  * @stream:  stream state
 201  *
 202  * Return: true if success
 203  */
 204 bool amdgpu_dm_psr_disable(struct dc_stream_state *stream)
 205 {
 206         unsigned int power_opt = 0;
 207         bool psr_enable = false;
 208
 209         DRM_DEBUG_DRIVER("Disabling psr...\n");
 210
 211         return dc_link_set_psr_allow_active(stream->link, &psr_enable, true, false, &power_opt);
 212 }
 213
 214 /*
 215  * amdgpu_dm_psr_disable() - disable psr f/w
 216  * if psr is enabled on any stream
 217  *
 218  * Return: true if success
 219  */
 220 bool amdgpu_dm_psr_disable_all(struct amdgpu_display_manager *dm)
 221 {
 222         DRM_DEBUG_DRIVER("Disabling psr if psr is enabled on any stream\n");
 223         return dc_set_psr_allow_active(dm->dc, false);
 224 }
 225