drivers/gpu/drm/amd/display/dc/clk_mgr/dcn10/rv1_clk_mgr.c

   1 /*
   2  * Copyright 2018 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 <linux/slab.h>
  27
  28 #include "reg_helper.h"
  29 #include "core_types.h"
  30 #include "clk_mgr_internal.h"
  31 #include "rv1_clk_mgr.h"
  32 #include "dce100/dce_clk_mgr.h"
  33 #include "dce112/dce112_clk_mgr.h"
  34 #include "rv1_clk_mgr_vbios_smu.h"
  35 #include "rv1_clk_mgr_clk.h"
  36
  37 void rv1_init_clocks(struct clk_mgr *clk_mgr)
  38 {
  39         memset(&(clk_mgr->clks), 0, sizeof(struct dc_clocks));
  40 }
  41
  42 static int rv1_determine_dppclk_threshold(struct clk_mgr_internal *clk_mgr, struct dc_clocks *new_clocks)
  43 {
  44         bool request_dpp_div = new_clocks->dispclk_khz > new_clocks->dppclk_khz;
  45         bool dispclk_increase = new_clocks->dispclk_khz > clk_mgr->base.clks.dispclk_khz;
  46         int disp_clk_threshold = new_clocks->max_supported_dppclk_khz;
  47         bool cur_dpp_div = clk_mgr->base.clks.dispclk_khz > clk_mgr->base.clks.dppclk_khz;
  48
  49         /* increase clock, looking for div is 0 for current, request div is 1*/
  50         if (dispclk_increase) {
  51                 /* already divided by 2, no need to reach target clk with 2 steps*/
  52                 if (cur_dpp_div)
  53                         return new_clocks->dispclk_khz;
  54
  55                 /* request disp clk is lower than maximum supported dpp clk,
  56                  * no need to reach target clk with two steps.
  57                  */
  58                 if (new_clocks->dispclk_khz <= disp_clk_threshold)
  59                         return new_clocks->dispclk_khz;
  60
  61                 /* target dpp clk not request divided by 2, still within threshold */
  62                 if (!request_dpp_div)
  63                         return new_clocks->dispclk_khz;
  64
  65         } else {
  66                 /* decrease clock, looking for current dppclk divided by 2,
  67                  * request dppclk not divided by 2.
  68                  */
  69
  70                 /* current dpp clk not divided by 2, no need to ramp*/
  71                 if (!cur_dpp_div)
  72                         return new_clocks->dispclk_khz;
  73
  74                 /* current disp clk is lower than current maximum dpp clk,
  75                  * no need to ramp
  76                  */
  77                 if (clk_mgr->base.clks.dispclk_khz <= disp_clk_threshold)
  78                         return new_clocks->dispclk_khz;
  79
  80                 /* request dpp clk need to be divided by 2 */
  81                 if (request_dpp_div)
  82                         return new_clocks->dispclk_khz;
  83         }
  84
  85         return disp_clk_threshold;
  86 }
  87
  88 static void ramp_up_dispclk_with_dpp(struct clk_mgr_internal *clk_mgr, struct dc *dc, struct dc_clocks *new_clocks)
  89 {
  90         int i;
  91         int dispclk_to_dpp_threshold = rv1_determine_dppclk_threshold(clk_mgr, new_clocks);
  92         bool request_dpp_div = new_clocks->dispclk_khz > new_clocks->dppclk_khz;
  93
  94         /* set disp clk to dpp clk threshold */
  95
  96         clk_mgr->funcs->set_dispclk(clk_mgr, dispclk_to_dpp_threshold);
  97         clk_mgr->funcs->set_dprefclk(clk_mgr);
  98
  99
 100         /* update request dpp clk division option */
 101         for (i = 0; i < dc->res_pool->pipe_count; i++) {
 102                 struct pipe_ctx *pipe_ctx = &dc->current_state->res_ctx.pipe_ctx[i];
 103
 104                 if (!pipe_ctx->plane_state)
 105                         continue;
 106
 107                 pipe_ctx->plane_res.dpp->funcs->dpp_dppclk_control(
 108                                 pipe_ctx->plane_res.dpp,
 109                                 request_dpp_div,
 110                                 true);
 111         }
 112
 113         /* If target clk not same as dppclk threshold, set to target clock */
 114         if (dispclk_to_dpp_threshold != new_clocks->dispclk_khz) {
 115                 clk_mgr->funcs->set_dispclk(clk_mgr, new_clocks->dispclk_khz);
 116                 clk_mgr->funcs->set_dprefclk(clk_mgr);
 117         }
 118
 119
 120         clk_mgr->base.clks.dispclk_khz = new_clocks->dispclk_khz;
 121         clk_mgr->base.clks.dppclk_khz = new_clocks->dppclk_khz;
 122         clk_mgr->base.clks.max_supported_dppclk_khz = new_clocks->max_supported_dppclk_khz;
 123 }
 124
 125 static void rv1_update_clocks(struct clk_mgr *clk_mgr_base,
 126                         struct dc_state *context,
 127                         bool safe_to_lower)
 128 {
 129         struct clk_mgr_internal *clk_mgr = TO_CLK_MGR_INTERNAL(clk_mgr_base);
 130         struct dc *dc = clk_mgr_base->ctx->dc;
 131         struct dc_debug_options *debug = &dc->debug;
 132         struct dc_clocks *new_clocks = &context->bw_ctx.bw.dcn.clk;
 133         struct pp_smu_funcs_rv *pp_smu = NULL;
 134         bool send_request_to_increase = false;
 135         bool send_request_to_lower = false;
 136         int display_count;
 137
 138         bool enter_display_off = false;
 139
 140         ASSERT(clk_mgr->pp_smu);
 141
 142         pp_smu = &clk_mgr->pp_smu->rv_funcs;
 143
 144         display_count = clk_mgr_helper_get_active_display_cnt(dc, context);
 145
 146         if (display_count == 0)
 147                 enter_display_off = true;
 148
 149         if (enter_display_off == safe_to_lower) {
 150                 /*
 151                  * Notify SMU active displays
 152                  * if function pointer not set up, this message is
 153                  * sent as part of pplib_apply_display_requirements.
 154                  */
 155                 if (pp_smu->set_display_count)
 156                         pp_smu->set_display_count(&pp_smu->pp_smu, display_count);
 157         }
 158
 159         if (new_clocks->dispclk_khz > clk_mgr_base->clks.dispclk_khz
 160                         || new_clocks->phyclk_khz > clk_mgr_base->clks.phyclk_khz
 161                         || new_clocks->fclk_khz > clk_mgr_base->clks.fclk_khz
 162                         || new_clocks->dcfclk_khz > clk_mgr_base->clks.dcfclk_khz)
 163                 send_request_to_increase = true;
 164
 165         if (should_set_clock(safe_to_lower, new_clocks->phyclk_khz, clk_mgr_base->clks.phyclk_khz)) {
 166                 clk_mgr_base->clks.phyclk_khz = new_clocks->phyclk_khz;
 167                 send_request_to_lower = true;
 168         }
 169
 170         // F Clock
 171         if (debug->force_fclk_khz != 0)
 172                 new_clocks->fclk_khz = debug->force_fclk_khz;
 173
 174         if (should_set_clock(safe_to_lower, new_clocks->fclk_khz, clk_mgr_base->clks.fclk_khz)) {
 175                 clk_mgr_base->clks.fclk_khz = new_clocks->fclk_khz;
 176                 send_request_to_lower = true;
 177         }
 178
 179         //DCF Clock
 180         if (should_set_clock(safe_to_lower, new_clocks->dcfclk_khz, clk_mgr_base->clks.dcfclk_khz)) {
 181                 clk_mgr_base->clks.dcfclk_khz = new_clocks->dcfclk_khz;
 182                 send_request_to_lower = true;
 183         }
 184
 185         if (should_set_clock(safe_to_lower,
 186                         new_clocks->dcfclk_deep_sleep_khz, clk_mgr_base->clks.dcfclk_deep_sleep_khz)) {
 187                 clk_mgr_base->clks.dcfclk_deep_sleep_khz = new_clocks->dcfclk_deep_sleep_khz;
 188                 send_request_to_lower = true;
 189         }
 190
 191         /* make sure dcf clk is before dpp clk to
 192          * make sure we have enough voltage to run dpp clk
 193          */
 194         if (send_request_to_increase) {
 195                 /*use dcfclk to request voltage*/
 196                 if (pp_smu->set_hard_min_fclk_by_freq &&
 197                                 pp_smu->set_hard_min_dcfclk_by_freq &&
 198                                 pp_smu->set_min_deep_sleep_dcfclk) {
 199                         pp_smu->set_hard_min_fclk_by_freq(&pp_smu->pp_smu, new_clocks->fclk_khz / 1000);
 200                         pp_smu->set_hard_min_dcfclk_by_freq(&pp_smu->pp_smu, new_clocks->dcfclk_khz / 1000);
 201                         pp_smu->set_min_deep_sleep_dcfclk(&pp_smu->pp_smu, (new_clocks->dcfclk_deep_sleep_khz + 999) / 1000);
 202                 }
 203         }
 204
 205         /* dcn1 dppclk is tied to dispclk */
 206         /* program dispclk on = as a w/a for sleep resume clock ramping issues */
 207         if (should_set_clock(safe_to_lower, new_clocks->dispclk_khz, clk_mgr_base->clks.dispclk_khz)
 208                         || new_clocks->dispclk_khz == clk_mgr_base->clks.dispclk_khz) {
 209                 ramp_up_dispclk_with_dpp(clk_mgr, dc, new_clocks);
 210                 clk_mgr_base->clks.dispclk_khz = new_clocks->dispclk_khz;
 211                 send_request_to_lower = true;
 212         }
 213
 214         if (!send_request_to_increase && send_request_to_lower) {
 215                 /*use dcfclk to request voltage*/
 216                 if (pp_smu->set_hard_min_fclk_by_freq &&
 217                                 pp_smu->set_hard_min_dcfclk_by_freq &&
 218                                 pp_smu->set_min_deep_sleep_dcfclk) {
 219                         pp_smu->set_hard_min_fclk_by_freq(&pp_smu->pp_smu, new_clocks->fclk_khz / 1000);
 220                         pp_smu->set_hard_min_dcfclk_by_freq(&pp_smu->pp_smu, new_clocks->dcfclk_khz / 1000);
 221                         pp_smu->set_min_deep_sleep_dcfclk(&pp_smu->pp_smu, (new_clocks->dcfclk_deep_sleep_khz + 999) / 1000);
 222                 }
 223         }
 224 }
 225
 226 static void rv1_enable_pme_wa(struct clk_mgr *clk_mgr_base)
 227 {
 228         struct clk_mgr_internal *clk_mgr = TO_CLK_MGR_INTERNAL(clk_mgr_base);
 229         struct pp_smu_funcs_rv *pp_smu = NULL;
 230
 231         if (clk_mgr->pp_smu) {
 232                 pp_smu = &clk_mgr->pp_smu->rv_funcs;
 233
 234                 if (pp_smu->set_pme_wa_enable)
 235                         pp_smu->set_pme_wa_enable(&pp_smu->pp_smu);
 236         }
 237 }
 238
 239 static struct clk_mgr_funcs rv1_clk_funcs = {
 240         .init_clocks = rv1_init_clocks,
 241         .get_dp_ref_clk_frequency = dce12_get_dp_ref_freq_khz,
 242         .update_clocks = rv1_update_clocks,
 243         .enable_pme_wa = rv1_enable_pme_wa,
 244 };
 245
 246 static struct clk_mgr_internal_funcs rv1_clk_internal_funcs = {
 247         .set_dispclk = rv1_vbios_smu_set_dispclk,
 248         .set_dprefclk = dce112_set_dprefclk
 249 };
 250
 251 void rv1_clk_mgr_construct(struct dc_context *ctx, struct clk_mgr_internal *clk_mgr, struct pp_smu_funcs *pp_smu)
 252 {
 253         struct dc_debug_options *debug = &ctx->dc->debug;
 254         struct dc_bios *bp = ctx->dc_bios;
 255
 256         clk_mgr->base.ctx = ctx;
 257         clk_mgr->pp_smu = pp_smu;
 258         clk_mgr->base.funcs = &rv1_clk_funcs;
 259         clk_mgr->funcs = &rv1_clk_internal_funcs;
 260
 261         clk_mgr->dfs_bypass_disp_clk = 0;
 262
 263         clk_mgr->dprefclk_ss_percentage = 0;
 264         clk_mgr->dprefclk_ss_divider = 1000;
 265         clk_mgr->ss_on_dprefclk = false;
 266         clk_mgr->base.dprefclk_khz = 600000;
 267
 268         if (bp->integrated_info)
 269                 clk_mgr->dentist_vco_freq_khz = bp->integrated_info->dentist_vco_freq;
 270         if (bp->fw_info_valid && clk_mgr->dentist_vco_freq_khz == 0) {
 271                 clk_mgr->dentist_vco_freq_khz = bp->fw_info.smu_gpu_pll_output_freq;
 272                 if (clk_mgr->dentist_vco_freq_khz == 0)
 273                         clk_mgr->dentist_vco_freq_khz = 3600000;
 274         }
 275
 276         if (!debug->disable_dfs_bypass && bp->integrated_info)
 277                 if (bp->integrated_info->gpu_cap_info & DFS_BYPASS_ENABLE)
 278                         clk_mgr->dfs_bypass_enabled = true;
 279
 280         dce_clock_read_ss_info(clk_mgr);
 281 }
 282
 283