root/drivers/gpu/drm/amd/display/dc/clk_mgr/dce110/dce110_clk_mgr.c

DEFINITIONS

1. determine_sclk_from_bounding_box
2. dce110_get_min_vblank_time_us
3. dce110_fill_display_configs
4. dce11_pplib_apply_display_requirements
5. dce11_update_clocks
6. dce110_clk_mgr_construct

   1 /*
   2  * Copyright 2012-16 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 "core_types.h"
  27 #include "clk_mgr_internal.h"
  28 
  29 #include "dce/dce_11_0_d.h"
  30 #include "dce/dce_11_0_sh_mask.h"
  31 #include "dce110_clk_mgr.h"
  32 #include "../clk_mgr/dce100/dce_clk_mgr.h"
  33 
  34 /* set register offset */
  35 #define SR(reg_name)\
  36         .reg_name = mm ## reg_name
  37 
  38 /* set register offset with instance */
  39 #define SRI(reg_name, block, id)\
  40         .reg_name = mm ## block ## id ## _ ## reg_name
  41 
  42 static const struct clk_mgr_registers disp_clk_regs = {
  43                 CLK_COMMON_REG_LIST_DCE_BASE()
  44 };
  45 
  46 static const struct clk_mgr_shift disp_clk_shift = {
  47                 CLK_COMMON_MASK_SH_LIST_DCE_COMMON_BASE(__SHIFT)
  48 };
  49 
  50 static const struct clk_mgr_mask disp_clk_mask = {
  51                 CLK_COMMON_MASK_SH_LIST_DCE_COMMON_BASE(_MASK)
  52 };
  53 
  54 static const struct state_dependent_clocks dce110_max_clks_by_state[] = {
  55 /*ClocksStateInvalid - should not be used*/
  56 { .display_clk_khz = 0, .pixel_clk_khz = 0 },
  57 /*ClocksStateUltraLow - currently by HW design team not supposed to be used*/
  58 { .display_clk_khz = 352000, .pixel_clk_khz = 330000 },
  59 /*ClocksStateLow*/
  60 { .display_clk_khz = 352000, .pixel_clk_khz = 330000 },
  61 /*ClocksStateNominal*/
  62 { .display_clk_khz = 467000, .pixel_clk_khz = 400000 },
  63 /*ClocksStatePerformance*/
  64 { .display_clk_khz = 643000, .pixel_clk_khz = 400000 } };
  65 
  66 static int determine_sclk_from_bounding_box(
  67                 const struct dc *dc,
  68                 int required_sclk)
  69 {
  70         int i;
  71 
  72         /*
  73          * Some asics do not give us sclk levels, so we just report the actual
  74          * required sclk
  75          */
  76         if (dc->sclk_lvls.num_levels == 0)
  77                 return required_sclk;
  78 
  79         for (i = 0; i < dc->sclk_lvls.num_levels; i++) {
  80                 if (dc->sclk_lvls.clocks_in_khz[i] >= required_sclk)
  81                         return dc->sclk_lvls.clocks_in_khz[i];
  82         }
  83         /*
  84          * even maximum level could not satisfy requirement, this
  85          * is unexpected at this stage, should have been caught at
  86          * validation time
  87          */
  88         ASSERT(0);
  89         return dc->sclk_lvls.clocks_in_khz[dc->sclk_lvls.num_levels - 1];
  90 }
  91 
  92 uint32_t dce110_get_min_vblank_time_us(const struct dc_state *context)
  93 {
  94         uint8_t j;
  95         uint32_t min_vertical_blank_time = -1;
  96 
  97         for (j = 0; j < context->stream_count; j++) {
  98                 struct dc_stream_state *stream = context->streams[j];
  99                 uint32_t vertical_blank_in_pixels = 0;
 100                 uint32_t vertical_blank_time = 0;
 101                 uint32_t vertical_total_min = stream->timing.v_total;
 102                 struct dc_crtc_timing_adjust adjust = stream->adjust;
 103                 if (adjust.v_total_max != adjust.v_total_min)
 104                         vertical_total_min = adjust.v_total_min;
 105 
 106                 vertical_blank_in_pixels = stream->timing.h_total *
 107                         (vertical_total_min
 108                          - stream->timing.v_addressable);
 109                 vertical_blank_time = vertical_blank_in_pixels
 110                         * 10000 / stream->timing.pix_clk_100hz;
 111 
 112                 if (min_vertical_blank_time > vertical_blank_time)
 113                         min_vertical_blank_time = vertical_blank_time;
 114         }
 115 
 116         return min_vertical_blank_time;
 117 }
 118 
 119 void dce110_fill_display_configs(
 120         const struct dc_state *context,
 121         struct dm_pp_display_configuration *pp_display_cfg)
 122 {
 123         int j;
 124         int num_cfgs = 0;
 125 
 126         for (j = 0; j < context->stream_count; j++) {
 127                 int k;
 128 
 129                 const struct dc_stream_state *stream = context->streams[j];
 130                 struct dm_pp_single_disp_config *cfg =
 131                         &pp_display_cfg->disp_configs[num_cfgs];
 132                 const struct pipe_ctx *pipe_ctx = NULL;
 133 
 134                 for (k = 0; k < MAX_PIPES; k++)
 135                         if (stream == context->res_ctx.pipe_ctx[k].stream) {
 136                                 pipe_ctx = &context->res_ctx.pipe_ctx[k];
 137                                 break;
 138                         }
 139 
 140                 ASSERT(pipe_ctx != NULL);
 141 
 142                 /* only notify active stream */
 143                 if (stream->dpms_off)
 144                         continue;
 145 
 146                 num_cfgs++;
 147                 cfg->signal = pipe_ctx->stream->signal;
 148                 cfg->pipe_idx = pipe_ctx->stream_res.tg->inst;
 149                 cfg->src_height = stream->src.height;
 150                 cfg->src_width = stream->src.width;
 151                 cfg->ddi_channel_mapping =
 152                         stream->link->ddi_channel_mapping.raw;
 153                 cfg->transmitter =
 154                         stream->link->link_enc->transmitter;
 155                 cfg->link_settings.lane_count =
 156                         stream->link->cur_link_settings.lane_count;
 157                 cfg->link_settings.link_rate =
 158                         stream->link->cur_link_settings.link_rate;
 159                 cfg->link_settings.link_spread =
 160                         stream->link->cur_link_settings.link_spread;
 161                 cfg->sym_clock = stream->phy_pix_clk;
 162                 /* Round v_refresh*/
 163                 cfg->v_refresh = stream->timing.pix_clk_100hz * 100;
 164                 cfg->v_refresh /= stream->timing.h_total;
 165                 cfg->v_refresh = (cfg->v_refresh + stream->timing.v_total / 2)
 166                                                         / stream->timing.v_total;
 167         }
 168 
 169         pp_display_cfg->display_count = num_cfgs;
 170 }
 171 
 172 void dce11_pplib_apply_display_requirements(
 173         struct dc *dc,
 174         struct dc_state *context)
 175 {
 176         struct dm_pp_display_configuration *pp_display_cfg = &context->pp_display_cfg;
 177         int memory_type_multiplier = MEMORY_TYPE_MULTIPLIER_CZ;
 178 
 179         if (dc->bw_vbios && dc->bw_vbios->memory_type == bw_def_hbm)
 180                 memory_type_multiplier = MEMORY_TYPE_HBM;
 181 
 182         pp_display_cfg->all_displays_in_sync =
 183                 context->bw_ctx.bw.dce.all_displays_in_sync;
 184         pp_display_cfg->nb_pstate_switch_disable =
 185                         context->bw_ctx.bw.dce.nbp_state_change_enable == false;
 186         pp_display_cfg->cpu_cc6_disable =
 187                         context->bw_ctx.bw.dce.cpuc_state_change_enable == false;
 188         pp_display_cfg->cpu_pstate_disable =
 189                         context->bw_ctx.bw.dce.cpup_state_change_enable == false;
 190         pp_display_cfg->cpu_pstate_separation_time =
 191                         context->bw_ctx.bw.dce.blackout_recovery_time_us;
 192 
 193         /*
 194          * TODO: determine whether the bandwidth has reached memory's limitation
 195          * , then change minimum memory clock based on real-time bandwidth
 196          * limitation.
 197          */
 198         if (ASICREV_IS_VEGA20_P(dc->ctx->asic_id.hw_internal_rev) && (context->stream_count >= 2)) {
 199                 pp_display_cfg->min_memory_clock_khz = max(pp_display_cfg->min_memory_clock_khz,
 200                                                            (uint32_t) div64_s64(
 201                                                                    div64_s64(dc->bw_vbios->high_yclk.value,
 202                                                                              memory_type_multiplier), 10000));
 203         } else {
 204                 pp_display_cfg->min_memory_clock_khz = context->bw_ctx.bw.dce.yclk_khz
 205                         / memory_type_multiplier;
 206         }
 207 
 208         pp_display_cfg->min_engine_clock_khz = determine_sclk_from_bounding_box(
 209                         dc,
 210                         context->bw_ctx.bw.dce.sclk_khz);
 211 
 212         /*
 213          * As workaround for >4x4K lightup set dcfclock to min_engine_clock value.
 214          * This is not required for less than 5 displays,
 215          * thus don't request decfclk in dc to avoid impact
 216          * on power saving.
 217          *
 218          */
 219         pp_display_cfg->min_dcfclock_khz = (context->stream_count > 4) ?
 220                         pp_display_cfg->min_engine_clock_khz : 0;
 221 
 222         pp_display_cfg->min_engine_clock_deep_sleep_khz
 223                         = context->bw_ctx.bw.dce.sclk_deep_sleep_khz;
 224 
 225         pp_display_cfg->avail_mclk_switch_time_us =
 226                                                 dce110_get_min_vblank_time_us(context);
 227         /* TODO: dce11.2*/
 228         pp_display_cfg->avail_mclk_switch_time_in_disp_active_us = 0;
 229 
 230         pp_display_cfg->disp_clk_khz = dc->clk_mgr->clks.dispclk_khz;
 231 
 232         dce110_fill_display_configs(context, pp_display_cfg);
 233 
 234         /* TODO: is this still applicable?*/
 235         if (pp_display_cfg->display_count == 1) {
 236                 const struct dc_crtc_timing *timing =
 237                         &context->streams[0]->timing;
 238 
 239                 pp_display_cfg->crtc_index =
 240                         pp_display_cfg->disp_configs[0].pipe_idx;
 241                 pp_display_cfg->line_time_in_us = timing->h_total * 10000 / timing->pix_clk_100hz;
 242         }
 243 
 244         if (memcmp(&dc->current_state->pp_display_cfg, pp_display_cfg, sizeof(*pp_display_cfg)) !=  0)
 245                 dm_pp_apply_display_requirements(dc->ctx, pp_display_cfg);
 246 }
 247 
 248 static void dce11_update_clocks(struct clk_mgr *clk_mgr_base,
 249                         struct dc_state *context,
 250                         bool safe_to_lower)
 251 {
 252         struct clk_mgr_internal *clk_mgr_dce = TO_CLK_MGR_INTERNAL(clk_mgr_base);
 253         struct dm_pp_power_level_change_request level_change_req;
 254         int patched_disp_clk = context->bw_ctx.bw.dce.dispclk_khz;
 255 
 256         /*TODO: W/A for dal3 linux, investigate why this works */
 257         if (!clk_mgr_dce->dfs_bypass_active)
 258                 patched_disp_clk = patched_disp_clk * 115 / 100;
 259 
 260         level_change_req.power_level = dce_get_required_clocks_state(clk_mgr_base, context);
 261         /* get max clock state from PPLIB */
 262         if ((level_change_req.power_level < clk_mgr_dce->cur_min_clks_state && safe_to_lower)
 263                         || level_change_req.power_level > clk_mgr_dce->cur_min_clks_state) {
 264                 if (dm_pp_apply_power_level_change_request(clk_mgr_base->ctx, &level_change_req))
 265                         clk_mgr_dce->cur_min_clks_state = level_change_req.power_level;
 266         }
 267 
 268         if (should_set_clock(safe_to_lower, patched_disp_clk, clk_mgr_base->clks.dispclk_khz)) {
 269                 context->bw_ctx.bw.dce.dispclk_khz = dce_set_clock(clk_mgr_base, patched_disp_clk);
 270                 clk_mgr_base->clks.dispclk_khz = patched_disp_clk;
 271         }
 272         dce11_pplib_apply_display_requirements(clk_mgr_base->ctx->dc, context);
 273 }
 274 
 275 static struct clk_mgr_funcs dce110_funcs = {
 276         .get_dp_ref_clk_frequency = dce_get_dp_ref_freq_khz,
 277         .update_clocks = dce11_update_clocks
 278 };
 279 
 280 void dce110_clk_mgr_construct(
 281                 struct dc_context *ctx,
 282                 struct clk_mgr_internal *clk_mgr)
 283 {
 284         dce_clk_mgr_construct(ctx, clk_mgr);
 285 
 286         memcpy(clk_mgr->max_clks_by_state,
 287                 dce110_max_clks_by_state,
 288                 sizeof(dce110_max_clks_by_state));
 289 
 290         clk_mgr->regs = &disp_clk_regs;
 291         clk_mgr->clk_mgr_shift = &disp_clk_shift;
 292         clk_mgr->clk_mgr_mask = &disp_clk_mask;
 293         clk_mgr->base.funcs = &dce110_funcs;
 294 
 295 }