root/drivers/gpu/drm/amd/display/dc/dce/dce_clk_mgr.c

DEFINITIONS

1. dentist_get_divider_from_did
2. clk_mgr_adjust_dp_ref_freq_for_ss
3. dce_get_dp_ref_freq_khz
4. dce12_get_dp_ref_freq_khz
5. get_max_pixel_clock_for_all_paths
6. dce_get_required_clocks_state
7. dce_set_clock
8. dce112_set_clock
9. dce_clock_read_integrated_info
10. dce_clock_read_ss_info
11. dce121_clock_patch_xgmi_ss_info
12. dce110_fill_display_configs
13. dce110_get_min_vblank_time_us
14. determine_sclk_from_bounding_box
15. dce_pplib_apply_display_requirements
16. dce11_pplib_apply_display_requirements
17. dce_update_clocks
18. dce11_update_clocks
19. dce112_update_clocks
20. dce12_update_clocks
21. dce_clk_mgr_construct
22. dce_clk_mgr_create
23. dce110_clk_mgr_create
24. dce112_clk_mgr_create
25. dce120_clk_mgr_create
26. dce121_clk_mgr_create
27. dce_clk_mgr_destroy

   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 <linux/slab.h>
  27 
  28 #include "dce_clk_mgr.h"
  29 
  30 #include "reg_helper.h"
  31 #include "dmcu.h"
  32 #include "core_types.h"
  33 #include "dal_asic_id.h"
  34 
  35 #define TO_DCE_CLK_MGR(clocks)\
  36         container_of(clocks, struct dce_clk_mgr, base)
  37 
  38 #define REG(reg) \
  39         (clk_mgr_dce->regs->reg)
  40 
  41 #undef FN
  42 #define FN(reg_name, field_name) \
  43         clk_mgr_dce->clk_mgr_shift->field_name, clk_mgr_dce->clk_mgr_mask->field_name
  44 
  45 #define CTX \
  46         clk_mgr_dce->base.ctx
  47 #define DC_LOGGER \
  48         clk_mgr->ctx->logger
  49 
  50 /* Max clock values for each state indexed by "enum clocks_state": */
  51 static const struct state_dependent_clocks dce80_max_clks_by_state[] = {
  52 /* ClocksStateInvalid - should not be used */
  53 { .display_clk_khz = 0, .pixel_clk_khz = 0 },
  54 /* ClocksStateUltraLow - not expected to be used for DCE 8.0 */
  55 { .display_clk_khz = 0, .pixel_clk_khz = 0 },
  56 /* ClocksStateLow */
  57 { .display_clk_khz = 352000, .pixel_clk_khz = 330000},
  58 /* ClocksStateNominal */
  59 { .display_clk_khz = 600000, .pixel_clk_khz = 400000 },
  60 /* ClocksStatePerformance */
  61 { .display_clk_khz = 600000, .pixel_clk_khz = 400000 } };
  62 
  63 static const struct state_dependent_clocks dce110_max_clks_by_state[] = {
  64 /*ClocksStateInvalid - should not be used*/
  65 { .display_clk_khz = 0, .pixel_clk_khz = 0 },
  66 /*ClocksStateUltraLow - currently by HW design team not supposed to be used*/
  67 { .display_clk_khz = 352000, .pixel_clk_khz = 330000 },
  68 /*ClocksStateLow*/
  69 { .display_clk_khz = 352000, .pixel_clk_khz = 330000 },
  70 /*ClocksStateNominal*/
  71 { .display_clk_khz = 467000, .pixel_clk_khz = 400000 },
  72 /*ClocksStatePerformance*/
  73 { .display_clk_khz = 643000, .pixel_clk_khz = 400000 } };
  74 
  75 static const struct state_dependent_clocks dce112_max_clks_by_state[] = {
  76 /*ClocksStateInvalid - should not be used*/
  77 { .display_clk_khz = 0, .pixel_clk_khz = 0 },
  78 /*ClocksStateUltraLow - currently by HW design team not supposed to be used*/
  79 { .display_clk_khz = 389189, .pixel_clk_khz = 346672 },
  80 /*ClocksStateLow*/
  81 { .display_clk_khz = 459000, .pixel_clk_khz = 400000 },
  82 /*ClocksStateNominal*/
  83 { .display_clk_khz = 667000, .pixel_clk_khz = 600000 },
  84 /*ClocksStatePerformance*/
  85 { .display_clk_khz = 1132000, .pixel_clk_khz = 600000 } };
  86 
  87 static const struct state_dependent_clocks dce120_max_clks_by_state[] = {
  88 /*ClocksStateInvalid - should not be used*/
  89 { .display_clk_khz = 0, .pixel_clk_khz = 0 },
  90 /*ClocksStateUltraLow - currently by HW design team not supposed to be used*/
  91 { .display_clk_khz = 0, .pixel_clk_khz = 0 },
  92 /*ClocksStateLow*/
  93 { .display_clk_khz = 460000, .pixel_clk_khz = 400000 },
  94 /*ClocksStateNominal*/
  95 { .display_clk_khz = 670000, .pixel_clk_khz = 600000 },
  96 /*ClocksStatePerformance*/
  97 { .display_clk_khz = 1133000, .pixel_clk_khz = 600000 } };
  98 
  99 int dentist_get_divider_from_did(int did)
 100 {
 101         if (did < DENTIST_BASE_DID_1)
 102                 did = DENTIST_BASE_DID_1;
 103         if (did > DENTIST_MAX_DID)
 104                 did = DENTIST_MAX_DID;
 105 
 106         if (did < DENTIST_BASE_DID_2) {
 107                 return DENTIST_DIVIDER_RANGE_1_START + DENTIST_DIVIDER_RANGE_1_STEP
 108                                                         * (did - DENTIST_BASE_DID_1);
 109         } else if (did < DENTIST_BASE_DID_3) {
 110                 return DENTIST_DIVIDER_RANGE_2_START + DENTIST_DIVIDER_RANGE_2_STEP
 111                                                         * (did - DENTIST_BASE_DID_2);
 112         } else if (did < DENTIST_BASE_DID_4) {
 113                 return DENTIST_DIVIDER_RANGE_3_START + DENTIST_DIVIDER_RANGE_3_STEP
 114                                                         * (did - DENTIST_BASE_DID_3);
 115         } else {
 116                 return DENTIST_DIVIDER_RANGE_4_START + DENTIST_DIVIDER_RANGE_4_STEP
 117                                                         * (did - DENTIST_BASE_DID_4);
 118         }
 119 }
 120 
 121 /* SW will adjust DP REF Clock average value for all purposes
 122  * (DP DTO / DP Audio DTO and DP GTC)
 123  if clock is spread for all cases:
 124  -if SS enabled on DP Ref clock and HW de-spreading enabled with SW
 125  calculations for DS_INCR/DS_MODULO (this is planned to be default case)
 126  -if SS enabled on DP Ref clock and HW de-spreading enabled with HW
 127  calculations (not planned to be used, but average clock should still
 128  be valid)
 129  -if SS enabled on DP Ref clock and HW de-spreading disabled
 130  (should not be case with CIK) then SW should program all rates
 131  generated according to average value (case as with previous ASICs)
 132   */
 133 static int clk_mgr_adjust_dp_ref_freq_for_ss(struct dce_clk_mgr *clk_mgr_dce, int dp_ref_clk_khz)
 134 {
 135         if (clk_mgr_dce->ss_on_dprefclk && clk_mgr_dce->dprefclk_ss_divider != 0) {
 136                 struct fixed31_32 ss_percentage = dc_fixpt_div_int(
 137                                 dc_fixpt_from_fraction(clk_mgr_dce->dprefclk_ss_percentage,
 138                                                         clk_mgr_dce->dprefclk_ss_divider), 200);
 139                 struct fixed31_32 adj_dp_ref_clk_khz;
 140 
 141                 ss_percentage = dc_fixpt_sub(dc_fixpt_one, ss_percentage);
 142                 adj_dp_ref_clk_khz = dc_fixpt_mul_int(ss_percentage, dp_ref_clk_khz);
 143                 dp_ref_clk_khz = dc_fixpt_floor(adj_dp_ref_clk_khz);
 144         }
 145         return dp_ref_clk_khz;
 146 }
 147 
 148 static int dce_get_dp_ref_freq_khz(struct clk_mgr *clk_mgr)
 149 {
 150         struct dce_clk_mgr *clk_mgr_dce = TO_DCE_CLK_MGR(clk_mgr);
 151         int dprefclk_wdivider;
 152         int dprefclk_src_sel;
 153         int dp_ref_clk_khz = 600000;
 154         int target_div;
 155 
 156         /* ASSERT DP Reference Clock source is from DFS*/
 157         REG_GET(DPREFCLK_CNTL, DPREFCLK_SRC_SEL, &dprefclk_src_sel);
 158         ASSERT(dprefclk_src_sel == 0);
 159 
 160         /* Read the mmDENTIST_DISPCLK_CNTL to get the currently
 161          * programmed DID DENTIST_DPREFCLK_WDIVIDER*/
 162         REG_GET(DENTIST_DISPCLK_CNTL, DENTIST_DPREFCLK_WDIVIDER, &dprefclk_wdivider);
 163 
 164         /* Convert DENTIST_DPREFCLK_WDIVIDERto actual divider*/
 165         target_div = dentist_get_divider_from_did(dprefclk_wdivider);
 166 
 167         /* Calculate the current DFS clock, in kHz.*/
 168         dp_ref_clk_khz = (DENTIST_DIVIDER_RANGE_SCALE_FACTOR
 169                 * clk_mgr_dce->dentist_vco_freq_khz) / target_div;
 170 
 171         return clk_mgr_adjust_dp_ref_freq_for_ss(clk_mgr_dce, dp_ref_clk_khz);
 172 }
 173 
 174 int dce12_get_dp_ref_freq_khz(struct clk_mgr *clk_mgr)
 175 {
 176         struct dce_clk_mgr *clk_mgr_dce = TO_DCE_CLK_MGR(clk_mgr);
 177 
 178         return clk_mgr_adjust_dp_ref_freq_for_ss(clk_mgr_dce, clk_mgr_dce->dprefclk_khz);
 179 }
 180 
 181 /* unit: in_khz before mode set, get pixel clock from context. ASIC register
 182  * may not be programmed yet
 183  */
 184 static uint32_t get_max_pixel_clock_for_all_paths(struct dc_state *context)
 185 {
 186         uint32_t max_pix_clk = 0;
 187         int i;
 188 
 189         for (i = 0; i < MAX_PIPES; i++) {
 190                 struct pipe_ctx *pipe_ctx = &context->res_ctx.pipe_ctx[i];
 191 
 192                 if (pipe_ctx->stream == NULL)
 193                         continue;
 194 
 195                 /* do not check under lay */
 196                 if (pipe_ctx->top_pipe)
 197                         continue;
 198 
 199                 if (pipe_ctx->stream_res.pix_clk_params.requested_pix_clk_100hz / 10 > max_pix_clk)
 200                         max_pix_clk = pipe_ctx->stream_res.pix_clk_params.requested_pix_clk_100hz / 10;
 201 
 202                 /* raise clock state for HBR3/2 if required. Confirmed with HW DCE/DPCS
 203                  * logic for HBR3 still needs Nominal (0.8V) on VDDC rail
 204                  */
 205                 if (dc_is_dp_signal(pipe_ctx->stream->signal) &&
 206                                 pipe_ctx->stream_res.pix_clk_params.requested_sym_clk > max_pix_clk)
 207                         max_pix_clk = pipe_ctx->stream_res.pix_clk_params.requested_sym_clk;
 208         }
 209 
 210         return max_pix_clk;
 211 }
 212 
 213 static enum dm_pp_clocks_state dce_get_required_clocks_state(
 214         struct clk_mgr *clk_mgr,
 215         struct dc_state *context)
 216 {
 217         struct dce_clk_mgr *clk_mgr_dce = TO_DCE_CLK_MGR(clk_mgr);
 218         int i;
 219         enum dm_pp_clocks_state low_req_clk;
 220         int max_pix_clk = get_max_pixel_clock_for_all_paths(context);
 221 
 222         /* Iterate from highest supported to lowest valid state, and update
 223          * lowest RequiredState with the lowest state that satisfies
 224          * all required clocks
 225          */
 226         for (i = clk_mgr_dce->max_clks_state; i >= DM_PP_CLOCKS_STATE_ULTRA_LOW; i--)
 227                 if (context->bw_ctx.bw.dce.dispclk_khz >
 228                                 clk_mgr_dce->max_clks_by_state[i].display_clk_khz
 229                         || max_pix_clk >
 230                                 clk_mgr_dce->max_clks_by_state[i].pixel_clk_khz)
 231                         break;
 232 
 233         low_req_clk = i + 1;
 234         if (low_req_clk > clk_mgr_dce->max_clks_state) {
 235                 /* set max clock state for high phyclock, invalid on exceeding display clock */
 236                 if (clk_mgr_dce->max_clks_by_state[clk_mgr_dce->max_clks_state].display_clk_khz
 237                                 < context->bw_ctx.bw.dce.dispclk_khz)
 238                         low_req_clk = DM_PP_CLOCKS_STATE_INVALID;
 239                 else
 240                         low_req_clk = clk_mgr_dce->max_clks_state;
 241         }
 242 
 243         return low_req_clk;
 244 }
 245 
 246 static int dce_set_clock(
 247         struct clk_mgr *clk_mgr,
 248         int requested_clk_khz)
 249 {
 250         struct dce_clk_mgr *clk_mgr_dce = TO_DCE_CLK_MGR(clk_mgr);
 251         struct bp_pixel_clock_parameters pxl_clk_params = { 0 };
 252         struct dc_bios *bp = clk_mgr->ctx->dc_bios;
 253         int actual_clock = requested_clk_khz;
 254         struct dmcu *dmcu = clk_mgr_dce->base.ctx->dc->res_pool->dmcu;
 255 
 256         /* Make sure requested clock isn't lower than minimum threshold*/
 257         if (requested_clk_khz > 0)
 258                 requested_clk_khz = max(requested_clk_khz,
 259                                 clk_mgr_dce->dentist_vco_freq_khz / 64);
 260 
 261         /* Prepare to program display clock*/
 262         pxl_clk_params.target_pixel_clock_100hz = requested_clk_khz * 10;
 263         pxl_clk_params.pll_id = CLOCK_SOURCE_ID_DFS;
 264 
 265         if (clk_mgr_dce->dfs_bypass_active)
 266                 pxl_clk_params.flags.SET_DISPCLK_DFS_BYPASS = true;
 267 
 268         bp->funcs->program_display_engine_pll(bp, &pxl_clk_params);
 269 
 270         if (clk_mgr_dce->dfs_bypass_active) {
 271                 /* Cache the fixed display clock*/
 272                 clk_mgr_dce->dfs_bypass_disp_clk =
 273                         pxl_clk_params.dfs_bypass_display_clock;
 274                 actual_clock = pxl_clk_params.dfs_bypass_display_clock;
 275         }
 276 
 277         /* from power down, we need mark the clock state as ClocksStateNominal
 278          * from HWReset, so when resume we will call pplib voltage regulator.*/
 279         if (requested_clk_khz == 0)
 280                 clk_mgr_dce->cur_min_clks_state = DM_PP_CLOCKS_STATE_NOMINAL;
 281 
 282         if (dmcu && dmcu->funcs->is_dmcu_initialized(dmcu))
 283                 dmcu->funcs->set_psr_wait_loop(dmcu, actual_clock / 1000 / 7);
 284 
 285         return actual_clock;
 286 }
 287 
 288 int dce112_set_clock(struct clk_mgr *clk_mgr, int requested_clk_khz)
 289 {
 290         struct dce_clk_mgr *clk_mgr_dce = TO_DCE_CLK_MGR(clk_mgr);
 291         struct bp_set_dce_clock_parameters dce_clk_params;
 292         struct dc_bios *bp = clk_mgr->ctx->dc_bios;
 293         struct dc *core_dc = clk_mgr->ctx->dc;
 294         struct dmcu *dmcu = core_dc->res_pool->dmcu;
 295         int actual_clock = requested_clk_khz;
 296         /* Prepare to program display clock*/
 297         memset(&dce_clk_params, 0, sizeof(dce_clk_params));
 298 
 299         /* Make sure requested clock isn't lower than minimum threshold*/
 300         if (requested_clk_khz > 0)
 301                 requested_clk_khz = max(requested_clk_khz,
 302                                 clk_mgr_dce->dentist_vco_freq_khz / 62);
 303 
 304         dce_clk_params.target_clock_frequency = requested_clk_khz;
 305         dce_clk_params.pll_id = CLOCK_SOURCE_ID_DFS;
 306         dce_clk_params.clock_type = DCECLOCK_TYPE_DISPLAY_CLOCK;
 307 
 308         bp->funcs->set_dce_clock(bp, &dce_clk_params);
 309         actual_clock = dce_clk_params.target_clock_frequency;
 310 
 311         /* from power down, we need mark the clock state as ClocksStateNominal
 312          * from HWReset, so when resume we will call pplib voltage regulator.*/
 313         if (requested_clk_khz == 0)
 314                 clk_mgr_dce->cur_min_clks_state = DM_PP_CLOCKS_STATE_NOMINAL;
 315 
 316         /*Program DP ref Clock*/
 317         /*VBIOS will determine DPREFCLK frequency, so we don't set it*/
 318         dce_clk_params.target_clock_frequency = 0;
 319         dce_clk_params.clock_type = DCECLOCK_TYPE_DPREFCLK;
 320         if (!ASICREV_IS_VEGA20_P(clk_mgr->ctx->asic_id.hw_internal_rev))
 321                 dce_clk_params.flags.USE_GENLOCK_AS_SOURCE_FOR_DPREFCLK =
 322                         (dce_clk_params.pll_id ==
 323                                         CLOCK_SOURCE_COMBO_DISPLAY_PLL0);
 324         else
 325                 dce_clk_params.flags.USE_GENLOCK_AS_SOURCE_FOR_DPREFCLK = false;
 326 
 327         bp->funcs->set_dce_clock(bp, &dce_clk_params);
 328 
 329         if (!IS_FPGA_MAXIMUS_DC(core_dc->ctx->dce_environment)) {
 330                 if (dmcu && dmcu->funcs->is_dmcu_initialized(dmcu)) {
 331                         if (clk_mgr_dce->dfs_bypass_disp_clk != actual_clock)
 332                                 dmcu->funcs->set_psr_wait_loop(dmcu,
 333                                                 actual_clock / 1000 / 7);
 334                 }
 335         }
 336 
 337         clk_mgr_dce->dfs_bypass_disp_clk = actual_clock;
 338         return actual_clock;
 339 }
 340 
 341 static void dce_clock_read_integrated_info(struct dce_clk_mgr *clk_mgr_dce)
 342 {
 343         struct dc_debug_options *debug = &clk_mgr_dce->base.ctx->dc->debug;
 344         struct dc_bios *bp = clk_mgr_dce->base.ctx->dc_bios;
 345         struct integrated_info info = { { { 0 } } };
 346         struct dc_firmware_info fw_info = { { 0 } };
 347         int i;
 348 
 349         if (bp->integrated_info)
 350                 info = *bp->integrated_info;
 351 
 352         clk_mgr_dce->dentist_vco_freq_khz = info.dentist_vco_freq;
 353         if (clk_mgr_dce->dentist_vco_freq_khz == 0) {
 354                 bp->funcs->get_firmware_info(bp, &fw_info);
 355                 clk_mgr_dce->dentist_vco_freq_khz =
 356                         fw_info.smu_gpu_pll_output_freq;
 357                 if (clk_mgr_dce->dentist_vco_freq_khz == 0)
 358                         clk_mgr_dce->dentist_vco_freq_khz = 3600000;
 359         }
 360 
 361         /*update the maximum display clock for each power state*/
 362         for (i = 0; i < NUMBER_OF_DISP_CLK_VOLTAGE; ++i) {
 363                 enum dm_pp_clocks_state clk_state = DM_PP_CLOCKS_STATE_INVALID;
 364 
 365                 switch (i) {
 366                 case 0:
 367                         clk_state = DM_PP_CLOCKS_STATE_ULTRA_LOW;
 368                         break;
 369 
 370                 case 1:
 371                         clk_state = DM_PP_CLOCKS_STATE_LOW;
 372                         break;
 373 
 374                 case 2:
 375                         clk_state = DM_PP_CLOCKS_STATE_NOMINAL;
 376                         break;
 377 
 378                 case 3:
 379                         clk_state = DM_PP_CLOCKS_STATE_PERFORMANCE;
 380                         break;
 381 
 382                 default:
 383                         clk_state = DM_PP_CLOCKS_STATE_INVALID;
 384                         break;
 385                 }
 386 
 387                 /*Do not allow bad VBIOS/SBIOS to override with invalid values,
 388                  * check for > 100MHz*/
 389                 if (info.disp_clk_voltage[i].max_supported_clk >= 100000)
 390                         clk_mgr_dce->max_clks_by_state[clk_state].display_clk_khz =
 391                                 info.disp_clk_voltage[i].max_supported_clk;
 392         }
 393 
 394         if (!debug->disable_dfs_bypass && bp->integrated_info)
 395                 if (bp->integrated_info->gpu_cap_info & DFS_BYPASS_ENABLE)
 396                         clk_mgr_dce->dfs_bypass_enabled = true;
 397 }
 398 
 399 void dce_clock_read_ss_info(struct dce_clk_mgr *clk_mgr_dce)
 400 {
 401         struct dc_bios *bp = clk_mgr_dce->base.ctx->dc_bios;
 402         int ss_info_num = bp->funcs->get_ss_entry_number(
 403                         bp, AS_SIGNAL_TYPE_GPU_PLL);
 404 
 405         if (ss_info_num) {
 406                 struct spread_spectrum_info info = { { 0 } };
 407                 enum bp_result result = bp->funcs->get_spread_spectrum_info(
 408                                 bp, AS_SIGNAL_TYPE_GPU_PLL, 0, &info);
 409 
 410                 /* Based on VBIOS, VBIOS will keep entry for GPU PLL SS
 411                  * even if SS not enabled and in that case
 412                  * SSInfo.spreadSpectrumPercentage !=0 would be sign
 413                  * that SS is enabled
 414                  */
 415                 if (result == BP_RESULT_OK &&
 416                                 info.spread_spectrum_percentage != 0) {
 417                         clk_mgr_dce->ss_on_dprefclk = true;
 418                         clk_mgr_dce->dprefclk_ss_divider = info.spread_percentage_divider;
 419 
 420                         if (info.type.CENTER_MODE == 0) {
 421                                 /* TODO: Currently for DP Reference clock we
 422                                  * need only SS percentage for
 423                                  * downspread */
 424                                 clk_mgr_dce->dprefclk_ss_percentage =
 425                                                 info.spread_spectrum_percentage;
 426                         }
 427 
 428                         return;
 429                 }
 430 
 431                 result = bp->funcs->get_spread_spectrum_info(
 432                                 bp, AS_SIGNAL_TYPE_DISPLAY_PORT, 0, &info);
 433 
 434                 /* Based on VBIOS, VBIOS will keep entry for DPREFCLK SS
 435                  * even if SS not enabled and in that case
 436                  * SSInfo.spreadSpectrumPercentage !=0 would be sign
 437                  * that SS is enabled
 438                  */
 439                 if (result == BP_RESULT_OK &&
 440                                 info.spread_spectrum_percentage != 0) {
 441                         clk_mgr_dce->ss_on_dprefclk = true;
 442                         clk_mgr_dce->dprefclk_ss_divider = info.spread_percentage_divider;
 443 
 444                         if (info.type.CENTER_MODE == 0) {
 445                                 /* Currently for DP Reference clock we
 446                                  * need only SS percentage for
 447                                  * downspread */
 448                                 clk_mgr_dce->dprefclk_ss_percentage =
 449                                                 info.spread_spectrum_percentage;
 450                         }
 451                 }
 452         }
 453 }
 454 
 455 /**
 456  * dce121_clock_patch_xgmi_ss_info() - Save XGMI spread spectrum info
 457  * @clk_mgr: clock manager base structure
 458  *
 459  * Reads from VBIOS the XGMI spread spectrum info and saves it within
 460  * the dce clock manager. This operation will overwrite the existing dprefclk
 461  * SS values if the vBIOS query succeeds. Otherwise, it does nothing. It also
 462  * sets the ->xgmi_enabled flag.
 463  */
 464 void dce121_clock_patch_xgmi_ss_info(struct clk_mgr *clk_mgr)
 465 {
 466         struct dce_clk_mgr *clk_mgr_dce = TO_DCE_CLK_MGR(clk_mgr);
 467         enum bp_result result;
 468         struct spread_spectrum_info info = { { 0 } };
 469         struct dc_bios *bp = clk_mgr_dce->base.ctx->dc_bios;
 470 
 471         clk_mgr_dce->xgmi_enabled = false;
 472 
 473         result = bp->funcs->get_spread_spectrum_info(bp, AS_SIGNAL_TYPE_XGMI,
 474                                                      0, &info);
 475         if (result == BP_RESULT_OK && info.spread_spectrum_percentage != 0) {
 476                 clk_mgr_dce->xgmi_enabled = true;
 477                 clk_mgr_dce->ss_on_dprefclk = true;
 478                 clk_mgr_dce->dprefclk_ss_divider =
 479                                 info.spread_percentage_divider;
 480 
 481                 if (info.type.CENTER_MODE == 0) {
 482                         /* Currently for DP Reference clock we
 483                          * need only SS percentage for
 484                          * downspread */
 485                         clk_mgr_dce->dprefclk_ss_percentage =
 486                                         info.spread_spectrum_percentage;
 487                 }
 488         }
 489 }
 490 
 491 void dce110_fill_display_configs(
 492         const struct dc_state *context,
 493         struct dm_pp_display_configuration *pp_display_cfg)
 494 {
 495         int j;
 496         int num_cfgs = 0;
 497 
 498         for (j = 0; j < context->stream_count; j++) {
 499                 int k;
 500 
 501                 const struct dc_stream_state *stream = context->streams[j];
 502                 struct dm_pp_single_disp_config *cfg =
 503                         &pp_display_cfg->disp_configs[num_cfgs];
 504                 const struct pipe_ctx *pipe_ctx = NULL;
 505 
 506                 for (k = 0; k < MAX_PIPES; k++)
 507                         if (stream == context->res_ctx.pipe_ctx[k].stream) {
 508                                 pipe_ctx = &context->res_ctx.pipe_ctx[k];
 509                                 break;
 510                         }
 511 
 512                 ASSERT(pipe_ctx != NULL);
 513 
 514                 /* only notify active stream */
 515                 if (stream->dpms_off)
 516                         continue;
 517 
 518                 num_cfgs++;
 519                 cfg->signal = pipe_ctx->stream->signal;
 520                 cfg->pipe_idx = pipe_ctx->stream_res.tg->inst;
 521                 cfg->src_height = stream->src.height;
 522                 cfg->src_width = stream->src.width;
 523                 cfg->ddi_channel_mapping =
 524                         stream->link->ddi_channel_mapping.raw;
 525                 cfg->transmitter =
 526                         stream->link->link_enc->transmitter;
 527                 cfg->link_settings.lane_count =
 528                         stream->link->cur_link_settings.lane_count;
 529                 cfg->link_settings.link_rate =
 530                         stream->link->cur_link_settings.link_rate;
 531                 cfg->link_settings.link_spread =
 532                         stream->link->cur_link_settings.link_spread;
 533                 cfg->sym_clock = stream->phy_pix_clk;
 534                 /* Round v_refresh*/
 535                 cfg->v_refresh = stream->timing.pix_clk_100hz * 100;
 536                 cfg->v_refresh /= stream->timing.h_total;
 537                 cfg->v_refresh = (cfg->v_refresh + stream->timing.v_total / 2)
 538                                                         / stream->timing.v_total;
 539         }
 540 
 541         pp_display_cfg->display_count = num_cfgs;
 542 }
 543 
 544 static uint32_t dce110_get_min_vblank_time_us(const struct dc_state *context)
 545 {
 546         uint8_t j;
 547         uint32_t min_vertical_blank_time = -1;
 548 
 549         for (j = 0; j < context->stream_count; j++) {
 550                 struct dc_stream_state *stream = context->streams[j];
 551                 uint32_t vertical_blank_in_pixels = 0;
 552                 uint32_t vertical_blank_time = 0;
 553 
 554                 vertical_blank_in_pixels = stream->timing.h_total *
 555                         (stream->timing.v_total
 556                          - stream->timing.v_addressable);
 557 
 558                 vertical_blank_time = vertical_blank_in_pixels
 559                         * 10000 / stream->timing.pix_clk_100hz;
 560 
 561                 if (min_vertical_blank_time > vertical_blank_time)
 562                         min_vertical_blank_time = vertical_blank_time;
 563         }
 564 
 565         return min_vertical_blank_time;
 566 }
 567 
 568 static int determine_sclk_from_bounding_box(
 569                 const struct dc *dc,
 570                 int required_sclk)
 571 {
 572         int i;
 573 
 574         /*
 575          * Some asics do not give us sclk levels, so we just report the actual
 576          * required sclk
 577          */
 578         if (dc->sclk_lvls.num_levels == 0)
 579                 return required_sclk;
 580 
 581         for (i = 0; i < dc->sclk_lvls.num_levels; i++) {
 582                 if (dc->sclk_lvls.clocks_in_khz[i] >= required_sclk)
 583                         return dc->sclk_lvls.clocks_in_khz[i];
 584         }
 585         /*
 586          * even maximum level could not satisfy requirement, this
 587          * is unexpected at this stage, should have been caught at
 588          * validation time
 589          */
 590         ASSERT(0);
 591         return dc->sclk_lvls.clocks_in_khz[dc->sclk_lvls.num_levels - 1];
 592 }
 593 
 594 static void dce_pplib_apply_display_requirements(
 595         struct dc *dc,
 596         struct dc_state *context)
 597 {
 598         struct dm_pp_display_configuration *pp_display_cfg = &context->pp_display_cfg;
 599 
 600         pp_display_cfg->avail_mclk_switch_time_us = dce110_get_min_vblank_time_us(context);
 601 
 602         dce110_fill_display_configs(context, pp_display_cfg);
 603 
 604         if (memcmp(&dc->current_state->pp_display_cfg, pp_display_cfg, sizeof(*pp_display_cfg)) !=  0)
 605                 dm_pp_apply_display_requirements(dc->ctx, pp_display_cfg);
 606 }
 607 
 608 static void dce11_pplib_apply_display_requirements(
 609         struct dc *dc,
 610         struct dc_state *context)
 611 {
 612         struct dm_pp_display_configuration *pp_display_cfg = &context->pp_display_cfg;
 613 
 614         pp_display_cfg->all_displays_in_sync =
 615                 context->bw_ctx.bw.dce.all_displays_in_sync;
 616         pp_display_cfg->nb_pstate_switch_disable =
 617                         context->bw_ctx.bw.dce.nbp_state_change_enable == false;
 618         pp_display_cfg->cpu_cc6_disable =
 619                         context->bw_ctx.bw.dce.cpuc_state_change_enable == false;
 620         pp_display_cfg->cpu_pstate_disable =
 621                         context->bw_ctx.bw.dce.cpup_state_change_enable == false;
 622         pp_display_cfg->cpu_pstate_separation_time =
 623                         context->bw_ctx.bw.dce.blackout_recovery_time_us;
 624 
 625         pp_display_cfg->min_memory_clock_khz = context->bw_ctx.bw.dce.yclk_khz
 626                 / MEMORY_TYPE_MULTIPLIER_CZ;
 627 
 628         pp_display_cfg->min_engine_clock_khz = determine_sclk_from_bounding_box(
 629                         dc,
 630                         context->bw_ctx.bw.dce.sclk_khz);
 631 
 632         /*
 633          * As workaround for >4x4K lightup set dcfclock to min_engine_clock value.
 634          * This is not required for less than 5 displays,
 635          * thus don't request decfclk in dc to avoid impact
 636          * on power saving.
 637          *
 638          */
 639         pp_display_cfg->min_dcfclock_khz = (context->stream_count > 4)?
 640                         pp_display_cfg->min_engine_clock_khz : 0;
 641 
 642         pp_display_cfg->min_engine_clock_deep_sleep_khz
 643                         = context->bw_ctx.bw.dce.sclk_deep_sleep_khz;
 644 
 645         pp_display_cfg->avail_mclk_switch_time_us =
 646                                                 dce110_get_min_vblank_time_us(context);
 647         /* TODO: dce11.2*/
 648         pp_display_cfg->avail_mclk_switch_time_in_disp_active_us = 0;
 649 
 650         pp_display_cfg->disp_clk_khz = dc->res_pool->clk_mgr->clks.dispclk_khz;
 651 
 652         dce110_fill_display_configs(context, pp_display_cfg);
 653 
 654         /* TODO: is this still applicable?*/
 655         if (pp_display_cfg->display_count == 1) {
 656                 const struct dc_crtc_timing *timing =
 657                         &context->streams[0]->timing;
 658 
 659                 pp_display_cfg->crtc_index =
 660                         pp_display_cfg->disp_configs[0].pipe_idx;
 661                 pp_display_cfg->line_time_in_us = timing->h_total * 10000 / timing->pix_clk_100hz;
 662         }
 663 
 664         if (memcmp(&dc->current_state->pp_display_cfg, pp_display_cfg, sizeof(*pp_display_cfg)) !=  0)
 665                 dm_pp_apply_display_requirements(dc->ctx, pp_display_cfg);
 666 }
 667 
 668 static void dce_update_clocks(struct clk_mgr *clk_mgr,
 669                         struct dc_state *context,
 670                         bool safe_to_lower)
 671 {
 672         struct dce_clk_mgr *clk_mgr_dce = TO_DCE_CLK_MGR(clk_mgr);
 673         struct dm_pp_power_level_change_request level_change_req;
 674         int patched_disp_clk = context->bw_ctx.bw.dce.dispclk_khz;
 675 
 676         /*TODO: W/A for dal3 linux, investigate why this works */
 677         if (!clk_mgr_dce->dfs_bypass_active)
 678                 patched_disp_clk = patched_disp_clk * 115 / 100;
 679 
 680         level_change_req.power_level = dce_get_required_clocks_state(clk_mgr, context);
 681         /* get max clock state from PPLIB */
 682         if ((level_change_req.power_level < clk_mgr_dce->cur_min_clks_state && safe_to_lower)
 683                         || level_change_req.power_level > clk_mgr_dce->cur_min_clks_state) {
 684                 if (dm_pp_apply_power_level_change_request(clk_mgr->ctx, &level_change_req))
 685                         clk_mgr_dce->cur_min_clks_state = level_change_req.power_level;
 686         }
 687 
 688         if (should_set_clock(safe_to_lower, patched_disp_clk, clk_mgr->clks.dispclk_khz)) {
 689                 patched_disp_clk = dce_set_clock(clk_mgr, patched_disp_clk);
 690                 clk_mgr->clks.dispclk_khz = patched_disp_clk;
 691         }
 692         dce_pplib_apply_display_requirements(clk_mgr->ctx->dc, context);
 693 }
 694 
 695 static void dce11_update_clocks(struct clk_mgr *clk_mgr,
 696                         struct dc_state *context,
 697                         bool safe_to_lower)
 698 {
 699         struct dce_clk_mgr *clk_mgr_dce = TO_DCE_CLK_MGR(clk_mgr);
 700         struct dm_pp_power_level_change_request level_change_req;
 701         int patched_disp_clk = context->bw_ctx.bw.dce.dispclk_khz;
 702 
 703         /*TODO: W/A for dal3 linux, investigate why this works */
 704         if (!clk_mgr_dce->dfs_bypass_active)
 705                 patched_disp_clk = patched_disp_clk * 115 / 100;
 706 
 707         level_change_req.power_level = dce_get_required_clocks_state(clk_mgr, context);
 708         /* get max clock state from PPLIB */
 709         if ((level_change_req.power_level < clk_mgr_dce->cur_min_clks_state && safe_to_lower)
 710                         || level_change_req.power_level > clk_mgr_dce->cur_min_clks_state) {
 711                 if (dm_pp_apply_power_level_change_request(clk_mgr->ctx, &level_change_req))
 712                         clk_mgr_dce->cur_min_clks_state = level_change_req.power_level;
 713         }
 714 
 715         if (should_set_clock(safe_to_lower, patched_disp_clk, clk_mgr->clks.dispclk_khz)) {
 716                 context->bw_ctx.bw.dce.dispclk_khz = dce_set_clock(clk_mgr, patched_disp_clk);
 717                 clk_mgr->clks.dispclk_khz = patched_disp_clk;
 718         }
 719         dce11_pplib_apply_display_requirements(clk_mgr->ctx->dc, context);
 720 }
 721 
 722 static void dce112_update_clocks(struct clk_mgr *clk_mgr,
 723                         struct dc_state *context,
 724                         bool safe_to_lower)
 725 {
 726         struct dce_clk_mgr *clk_mgr_dce = TO_DCE_CLK_MGR(clk_mgr);
 727         struct dm_pp_power_level_change_request level_change_req;
 728         int patched_disp_clk = context->bw_ctx.bw.dce.dispclk_khz;
 729 
 730         /*TODO: W/A for dal3 linux, investigate why this works */
 731         if (!clk_mgr_dce->dfs_bypass_active)
 732                 patched_disp_clk = patched_disp_clk * 115 / 100;
 733 
 734         level_change_req.power_level = dce_get_required_clocks_state(clk_mgr, context);
 735         /* get max clock state from PPLIB */
 736         if ((level_change_req.power_level < clk_mgr_dce->cur_min_clks_state && safe_to_lower)
 737                         || level_change_req.power_level > clk_mgr_dce->cur_min_clks_state) {
 738                 if (dm_pp_apply_power_level_change_request(clk_mgr->ctx, &level_change_req))
 739                         clk_mgr_dce->cur_min_clks_state = level_change_req.power_level;
 740         }
 741 
 742         if (should_set_clock(safe_to_lower, patched_disp_clk, clk_mgr->clks.dispclk_khz)) {
 743                 patched_disp_clk = dce112_set_clock(clk_mgr, patched_disp_clk);
 744                 clk_mgr->clks.dispclk_khz = patched_disp_clk;
 745         }
 746         dce11_pplib_apply_display_requirements(clk_mgr->ctx->dc, context);
 747 }
 748 
 749 static void dce12_update_clocks(struct clk_mgr *clk_mgr,
 750                         struct dc_state *context,
 751                         bool safe_to_lower)
 752 {
 753         struct dce_clk_mgr *clk_mgr_dce = TO_DCE_CLK_MGR(clk_mgr);
 754         struct dm_pp_clock_for_voltage_req clock_voltage_req = {0};
 755         int max_pix_clk = get_max_pixel_clock_for_all_paths(context);
 756         int patched_disp_clk = context->bw_ctx.bw.dce.dispclk_khz;
 757 
 758         /*TODO: W/A for dal3 linux, investigate why this works */
 759         if (!clk_mgr_dce->dfs_bypass_active)
 760                 patched_disp_clk = patched_disp_clk * 115 / 100;
 761 
 762         if (should_set_clock(safe_to_lower, patched_disp_clk, clk_mgr->clks.dispclk_khz)) {
 763                 clock_voltage_req.clk_type = DM_PP_CLOCK_TYPE_DISPLAY_CLK;
 764                 /*
 765                  * When xGMI is enabled, the display clk needs to be adjusted
 766                  * with the WAFL link's SS percentage.
 767                  */
 768                 if (clk_mgr_dce->xgmi_enabled)
 769                         patched_disp_clk = clk_mgr_adjust_dp_ref_freq_for_ss(
 770                                         clk_mgr_dce, patched_disp_clk);
 771                 clock_voltage_req.clocks_in_khz = patched_disp_clk;
 772                 clk_mgr->clks.dispclk_khz = dce112_set_clock(clk_mgr, patched_disp_clk);
 773 
 774                 dm_pp_apply_clock_for_voltage_request(clk_mgr->ctx, &clock_voltage_req);
 775         }
 776 
 777         if (should_set_clock(safe_to_lower, max_pix_clk, clk_mgr->clks.phyclk_khz)) {
 778                 clock_voltage_req.clk_type = DM_PP_CLOCK_TYPE_DISPLAYPHYCLK;
 779                 clock_voltage_req.clocks_in_khz = max_pix_clk;
 780                 clk_mgr->clks.phyclk_khz = max_pix_clk;
 781 
 782                 dm_pp_apply_clock_for_voltage_request(clk_mgr->ctx, &clock_voltage_req);
 783         }
 784         dce11_pplib_apply_display_requirements(clk_mgr->ctx->dc, context);
 785 }
 786 
 787 static const struct clk_mgr_funcs dce120_funcs = {
 788         .get_dp_ref_clk_frequency = dce12_get_dp_ref_freq_khz,
 789         .update_clocks = dce12_update_clocks
 790 };
 791 
 792 static const struct clk_mgr_funcs dce112_funcs = {
 793         .get_dp_ref_clk_frequency = dce_get_dp_ref_freq_khz,
 794         .update_clocks = dce112_update_clocks
 795 };
 796 
 797 static const struct clk_mgr_funcs dce110_funcs = {
 798         .get_dp_ref_clk_frequency = dce_get_dp_ref_freq_khz,
 799         .update_clocks = dce11_update_clocks,
 800 };
 801 
 802 static const struct clk_mgr_funcs dce_funcs = {
 803         .get_dp_ref_clk_frequency = dce_get_dp_ref_freq_khz,
 804         .update_clocks = dce_update_clocks
 805 };
 806 
 807 static void dce_clk_mgr_construct(
 808         struct dce_clk_mgr *clk_mgr_dce,
 809         struct dc_context *ctx,
 810         const struct clk_mgr_registers *regs,
 811         const struct clk_mgr_shift *clk_shift,
 812         const struct clk_mgr_mask *clk_mask)
 813 {
 814         struct clk_mgr *base = &clk_mgr_dce->base;
 815         struct dm_pp_static_clock_info static_clk_info = {0};
 816 
 817         base->ctx = ctx;
 818         base->funcs = &dce_funcs;
 819 
 820         clk_mgr_dce->regs = regs;
 821         clk_mgr_dce->clk_mgr_shift = clk_shift;
 822         clk_mgr_dce->clk_mgr_mask = clk_mask;
 823 
 824         clk_mgr_dce->dfs_bypass_disp_clk = 0;
 825 
 826         clk_mgr_dce->dprefclk_ss_percentage = 0;
 827         clk_mgr_dce->dprefclk_ss_divider = 1000;
 828         clk_mgr_dce->ss_on_dprefclk = false;
 829 
 830 
 831         if (dm_pp_get_static_clocks(ctx, &static_clk_info))
 832                 clk_mgr_dce->max_clks_state = static_clk_info.max_clocks_state;
 833         else
 834                 clk_mgr_dce->max_clks_state = DM_PP_CLOCKS_STATE_NOMINAL;
 835         clk_mgr_dce->cur_min_clks_state = DM_PP_CLOCKS_STATE_INVALID;
 836 
 837         dce_clock_read_integrated_info(clk_mgr_dce);
 838         dce_clock_read_ss_info(clk_mgr_dce);
 839 }
 840 
 841 struct clk_mgr *dce_clk_mgr_create(
 842         struct dc_context *ctx,
 843         const struct clk_mgr_registers *regs,
 844         const struct clk_mgr_shift *clk_shift,
 845         const struct clk_mgr_mask *clk_mask)
 846 {
 847         struct dce_clk_mgr *clk_mgr_dce = kzalloc(sizeof(*clk_mgr_dce), GFP_KERNEL);
 848 
 849         if (clk_mgr_dce == NULL) {
 850                 BREAK_TO_DEBUGGER();
 851                 return NULL;
 852         }
 853 
 854         memcpy(clk_mgr_dce->max_clks_by_state,
 855                 dce80_max_clks_by_state,
 856                 sizeof(dce80_max_clks_by_state));
 857 
 858         dce_clk_mgr_construct(
 859                 clk_mgr_dce, ctx, regs, clk_shift, clk_mask);
 860 
 861         return &clk_mgr_dce->base;
 862 }
 863 
 864 struct clk_mgr *dce110_clk_mgr_create(
 865         struct dc_context *ctx,
 866         const struct clk_mgr_registers *regs,
 867         const struct clk_mgr_shift *clk_shift,
 868         const struct clk_mgr_mask *clk_mask)
 869 {
 870         struct dce_clk_mgr *clk_mgr_dce = kzalloc(sizeof(*clk_mgr_dce), GFP_KERNEL);
 871 
 872         if (clk_mgr_dce == NULL) {
 873                 BREAK_TO_DEBUGGER();
 874                 return NULL;
 875         }
 876 
 877         memcpy(clk_mgr_dce->max_clks_by_state,
 878                 dce110_max_clks_by_state,
 879                 sizeof(dce110_max_clks_by_state));
 880 
 881         dce_clk_mgr_construct(
 882                 clk_mgr_dce, ctx, regs, clk_shift, clk_mask);
 883 
 884         clk_mgr_dce->base.funcs = &dce110_funcs;
 885 
 886         return &clk_mgr_dce->base;
 887 }
 888 
 889 struct clk_mgr *dce112_clk_mgr_create(
 890         struct dc_context *ctx,
 891         const struct clk_mgr_registers *regs,
 892         const struct clk_mgr_shift *clk_shift,
 893         const struct clk_mgr_mask *clk_mask)
 894 {
 895         struct dce_clk_mgr *clk_mgr_dce = kzalloc(sizeof(*clk_mgr_dce), GFP_KERNEL);
 896 
 897         if (clk_mgr_dce == NULL) {
 898                 BREAK_TO_DEBUGGER();
 899                 return NULL;
 900         }
 901 
 902         memcpy(clk_mgr_dce->max_clks_by_state,
 903                 dce112_max_clks_by_state,
 904                 sizeof(dce112_max_clks_by_state));
 905 
 906         dce_clk_mgr_construct(
 907                 clk_mgr_dce, ctx, regs, clk_shift, clk_mask);
 908 
 909         clk_mgr_dce->base.funcs = &dce112_funcs;
 910 
 911         return &clk_mgr_dce->base;
 912 }
 913 
 914 struct clk_mgr *dce120_clk_mgr_create(struct dc_context *ctx)
 915 {
 916         struct dce_clk_mgr *clk_mgr_dce = kzalloc(sizeof(*clk_mgr_dce), GFP_KERNEL);
 917 
 918         if (clk_mgr_dce == NULL) {
 919                 BREAK_TO_DEBUGGER();
 920                 return NULL;
 921         }
 922 
 923         memcpy(clk_mgr_dce->max_clks_by_state,
 924                 dce120_max_clks_by_state,
 925                 sizeof(dce120_max_clks_by_state));
 926 
 927         dce_clk_mgr_construct(
 928                 clk_mgr_dce, ctx, NULL, NULL, NULL);
 929 
 930         clk_mgr_dce->dprefclk_khz = 600000;
 931         clk_mgr_dce->base.funcs = &dce120_funcs;
 932 
 933         return &clk_mgr_dce->base;
 934 }
 935 
 936 struct clk_mgr *dce121_clk_mgr_create(struct dc_context *ctx)
 937 {
 938         struct dce_clk_mgr *clk_mgr_dce = kzalloc(sizeof(*clk_mgr_dce),
 939                                                   GFP_KERNEL);
 940 
 941         if (clk_mgr_dce == NULL) {
 942                 BREAK_TO_DEBUGGER();
 943                 return NULL;
 944         }
 945 
 946         memcpy(clk_mgr_dce->max_clks_by_state, dce120_max_clks_by_state,
 947                sizeof(dce120_max_clks_by_state));
 948 
 949         dce_clk_mgr_construct(clk_mgr_dce, ctx, NULL, NULL, NULL);
 950 
 951         clk_mgr_dce->dprefclk_khz = 625000;
 952         clk_mgr_dce->base.funcs = &dce120_funcs;
 953 
 954         return &clk_mgr_dce->base;
 955 }
 956 
 957 void dce_clk_mgr_destroy(struct clk_mgr **clk_mgr)
 958 {
 959         struct dce_clk_mgr *clk_mgr_dce = TO_DCE_CLK_MGR(*clk_mgr);
 960 
 961         kfree(clk_mgr_dce);
 962         *clk_mgr = NULL;
 963 }