drivers/gpu/drm/amd/display/dc/dce/dce_clock

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This source file includes following definitions.
get_ss_data_entry
calculate_fb_and_fractional_fb_divider
calc_fb_divider_checking_tolerance
calc_pll_dividers_in_range
calculate_pixel_clock_pll_dividers
pll_adjust_pix_clk
dce110_get_pix_clk_dividers_helper
dce112_get_pix_clk_dividers_helper
dce110_get_pix_clk_dividers
dce112_get_pix_clk_dividers
disable_spread_spectrum
calculate_ss
enable_spread_spectrum
dce110_program_pixel_clk_resync
dce112_program_pixel_clk_resync
dce110_program_pix_clk
dce112_program_pix_clk
dce110_clock_source_power_down
get_pixel_clk_frequency_100hz
dcn20_program_pix_clk
get_ss_info_from_atombios
ss_info_from_atombios_create
calc_pll_max_vco_construct
dce110_clk_src_construct
dce112_clk_src_construct
dcn20_clk_src_construct
   1 /*
   2  * Copyright 2012-15 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 "dm_services.h"
  29 
  30 
  31 #include "dc_types.h"
  32 #include "core_types.h"
  33 
  34 #include "include/grph_object_id.h"
  35 #include "include/logger_interface.h"
  36 
  37 #include "dce_clock_source.h"
  38 #include "clk_mgr.h"
  39 
  40 #include "reg_helper.h"
  41 
  42 #define REG(reg)\
  43         (clk_src->regs->reg)
  44 
  45 #define CTX \
  46         clk_src->base.ctx
  47 
  48 #define DC_LOGGER_INIT()
  49 
  50 #undef FN
  51 #define FN(reg_name, field_name) \
  52         clk_src->cs_shift->field_name, clk_src->cs_mask->field_name
  53 
  54 #define FRACT_FB_DIVIDER_DEC_POINTS_MAX_NUM 6
  55 #define CALC_PLL_CLK_SRC_ERR_TOLERANCE 1
  56 #define MAX_PLL_CALC_ERROR 0xFFFFFFFF
  57 
  58 #define NUM_ELEMENTS(a) (sizeof(a) / sizeof((a)[0]))
  59 
  60 static const struct spread_spectrum_data *get_ss_data_entry(
  61                 struct dce110_clk_src *clk_src,
  62                 enum signal_type signal,
  63                 uint32_t pix_clk_khz)
  64 {
  65 
  66         uint32_t entrys_num;
  67         uint32_t i;
  68         struct spread_spectrum_data *ss_parm = NULL;
  69         struct spread_spectrum_data *ret = NULL;
  70 
  71         switch (signal) {
  72         case SIGNAL_TYPE_DVI_SINGLE_LINK:
  73         case SIGNAL_TYPE_DVI_DUAL_LINK:
  74                 ss_parm = clk_src->dvi_ss_params;
  75                 entrys_num = clk_src->dvi_ss_params_cnt;
  76                 break;
  77 
  78         case SIGNAL_TYPE_HDMI_TYPE_A:
  79                 ss_parm = clk_src->hdmi_ss_params;
  80                 entrys_num = clk_src->hdmi_ss_params_cnt;
  81                 break;
  82 
  83         case SIGNAL_TYPE_LVDS:
  84                 ss_parm = clk_src->lvds_ss_params;
  85                 entrys_num = clk_src->lvds_ss_params_cnt;
  86                 break;
  87 
  88         case SIGNAL_TYPE_DISPLAY_PORT:
  89         case SIGNAL_TYPE_DISPLAY_PORT_MST:
  90         case SIGNAL_TYPE_EDP:
  91         case SIGNAL_TYPE_VIRTUAL:
  92                 ss_parm = clk_src->dp_ss_params;
  93                 entrys_num = clk_src->dp_ss_params_cnt;
  94                 break;
  95 
  96         default:
  97                 ss_parm = NULL;
  98                 entrys_num = 0;
  99                 break;
 100         }
 101 
 102         if (ss_parm == NULL)
 103                 return ret;
 104 
 105         for (i = 0; i < entrys_num; ++i, ++ss_parm) {
 106                 if (ss_parm->freq_range_khz >= pix_clk_khz) {
 107                         ret = ss_parm;
 108                         break;
 109                 }
 110         }
 111 
 112         return ret;
 113 }
 114 
 115 /**
 116  * Function: calculate_fb_and_fractional_fb_divider
 117  *
 118  * * DESCRIPTION: Calculates feedback and fractional feedback dividers values
 119  *
 120  *PARAMETERS:
 121  * targetPixelClock             Desired frequency in 100 Hz
 122  * ref_divider                  Reference divider (already known)
 123  * postDivider                  Post Divider (already known)
 124  * feedback_divider_param       Pointer where to store
 125  *                                      calculated feedback divider value
 126  * fract_feedback_divider_param Pointer where to store
 127  *                                      calculated fract feedback divider value
 128  *
 129  *RETURNS:
 130  * It fills the locations pointed by feedback_divider_param
 131  *                                      and fract_feedback_divider_param
 132  * It returns   - true if feedback divider not 0
 133  *              - false should never happen)
 134  */
 135 static bool calculate_fb_and_fractional_fb_divider(
 136                 struct calc_pll_clock_source *calc_pll_cs,
 137                 uint32_t target_pix_clk_100hz,
 138                 uint32_t ref_divider,
 139                 uint32_t post_divider,
 140                 uint32_t *feedback_divider_param,
 141                 uint32_t *fract_feedback_divider_param)
 142 {
 143         uint64_t feedback_divider;
 144 
 145         feedback_divider =
 146                 (uint64_t)target_pix_clk_100hz * ref_divider * post_divider;
 147         feedback_divider *= 10;
 148         /* additional factor, since we divide by 10 afterwards */
 149         feedback_divider *= (uint64_t)(calc_pll_cs->fract_fb_divider_factor);
 150         feedback_divider = div_u64(feedback_divider, calc_pll_cs->ref_freq_khz * 10ull);
 151 
 152 /*Round to the number of precision
 153  * The following code replace the old code (ullfeedbackDivider + 5)/10
 154  * for example if the difference between the number
 155  * of fractional feedback decimal point and the fractional FB Divider precision
 156  * is 2 then the equation becomes (ullfeedbackDivider + 5*100) / (10*100))*/
 157 
 158         feedback_divider += 5ULL *
 159                             calc_pll_cs->fract_fb_divider_precision_factor;
 160         feedback_divider =
 161                 div_u64(feedback_divider,
 162                         calc_pll_cs->fract_fb_divider_precision_factor * 10);
 163         feedback_divider *= (uint64_t)
 164                         (calc_pll_cs->fract_fb_divider_precision_factor);
 165 
 166         *feedback_divider_param =
 167                 div_u64_rem(
 168                         feedback_divider,
 169                         calc_pll_cs->fract_fb_divider_factor,
 170                         fract_feedback_divider_param);
 171 
 172         if (*feedback_divider_param != 0)
 173                 return true;
 174         return false;
 175 }
 176 
 177 /**
 178 *calc_fb_divider_checking_tolerance
 179 *
 180 *DESCRIPTION: Calculates Feedback and Fractional Feedback divider values
 181 *               for passed Reference and Post divider, checking for tolerance.
 182 *PARAMETERS:
 183 * pll_settings          Pointer to structure
 184 * ref_divider           Reference divider (already known)
 185 * postDivider           Post Divider (already known)
 186 * tolerance             Tolerance for Calculated Pixel Clock to be within
 187 *
 188 *RETURNS:
 189 * It fills the PLLSettings structure with PLL Dividers values
 190 * if calculated values are within required tolerance
 191 * It returns    - true if error is within tolerance
 192 *               - false if error is not within tolerance
 193 */
 194 static bool calc_fb_divider_checking_tolerance(
 195                 struct calc_pll_clock_source *calc_pll_cs,
 196                 struct pll_settings *pll_settings,
 197                 uint32_t ref_divider,
 198                 uint32_t post_divider,
 199                 uint32_t tolerance)
 200 {
 201         uint32_t feedback_divider;
 202         uint32_t fract_feedback_divider;
 203         uint32_t actual_calculated_clock_100hz;
 204         uint32_t abs_err;
 205         uint64_t actual_calc_clk_100hz;
 206 
 207         calculate_fb_and_fractional_fb_divider(
 208                         calc_pll_cs,
 209                         pll_settings->adjusted_pix_clk_100hz,
 210                         ref_divider,
 211                         post_divider,
 212                         &feedback_divider,
 213                         &fract_feedback_divider);
 214 
 215         /*Actual calculated value*/
 216         actual_calc_clk_100hz = (uint64_t)feedback_divider *
 217                                         calc_pll_cs->fract_fb_divider_factor +
 218                                                         fract_feedback_divider;
 219         actual_calc_clk_100hz *= calc_pll_cs->ref_freq_khz * 10;
 220         actual_calc_clk_100hz =
 221                 div_u64(actual_calc_clk_100hz,
 222                         ref_divider * post_divider *
 223                                 calc_pll_cs->fract_fb_divider_factor);
 224 
 225         actual_calculated_clock_100hz = (uint32_t)(actual_calc_clk_100hz);
 226 
 227         abs_err = (actual_calculated_clock_100hz >
 228                                         pll_settings->adjusted_pix_clk_100hz)
 229                         ? actual_calculated_clock_100hz -
 230                                         pll_settings->adjusted_pix_clk_100hz
 231                         : pll_settings->adjusted_pix_clk_100hz -
 232                                                 actual_calculated_clock_100hz;
 233 
 234         if (abs_err <= tolerance) {
 235                 /*found good values*/
 236                 pll_settings->reference_freq = calc_pll_cs->ref_freq_khz;
 237                 pll_settings->reference_divider = ref_divider;
 238                 pll_settings->feedback_divider = feedback_divider;
 239                 pll_settings->fract_feedback_divider = fract_feedback_divider;
 240                 pll_settings->pix_clk_post_divider = post_divider;
 241                 pll_settings->calculated_pix_clk_100hz =
 242                         actual_calculated_clock_100hz;
 243                 pll_settings->vco_freq =
 244                         actual_calculated_clock_100hz * post_divider / 10;
 245                 return true;
 246         }
 247         return false;
 248 }
 249 
 250 static bool calc_pll_dividers_in_range(
 251                 struct calc_pll_clock_source *calc_pll_cs,
 252                 struct pll_settings *pll_settings,
 253                 uint32_t min_ref_divider,
 254                 uint32_t max_ref_divider,
 255                 uint32_t min_post_divider,
 256                 uint32_t max_post_divider,
 257                 uint32_t err_tolerance)
 258 {
 259         uint32_t ref_divider;
 260         uint32_t post_divider;
 261         uint32_t tolerance;
 262 
 263 /* This is err_tolerance / 10000 = 0.0025 - acceptable error of 0.25%
 264  * This is errorTolerance / 10000 = 0.0001 - acceptable error of 0.01%*/
 265         tolerance = (pll_settings->adjusted_pix_clk_100hz * err_tolerance) /
 266                                                                         100000;
 267         if (tolerance < CALC_PLL_CLK_SRC_ERR_TOLERANCE)
 268                 tolerance = CALC_PLL_CLK_SRC_ERR_TOLERANCE;
 269 
 270         for (
 271                         post_divider = max_post_divider;
 272                         post_divider >= min_post_divider;
 273                         --post_divider) {
 274                 for (
 275                                 ref_divider = min_ref_divider;
 276                                 ref_divider <= max_ref_divider;
 277                                 ++ref_divider) {
 278                         if (calc_fb_divider_checking_tolerance(
 279                                         calc_pll_cs,
 280                                         pll_settings,
 281                                         ref_divider,
 282                                         post_divider,
 283                                         tolerance)) {
 284                                 return true;
 285                         }
 286                 }
 287         }
 288 
 289         return false;
 290 }
 291 
 292 static uint32_t calculate_pixel_clock_pll_dividers(
 293                 struct calc_pll_clock_source *calc_pll_cs,
 294                 struct pll_settings *pll_settings)
 295 {
 296         uint32_t err_tolerance;
 297         uint32_t min_post_divider;
 298         uint32_t max_post_divider;
 299         uint32_t min_ref_divider;
 300         uint32_t max_ref_divider;
 301 
 302         if (pll_settings->adjusted_pix_clk_100hz == 0) {
 303                 DC_LOG_ERROR(
 304                         "%s Bad requested pixel clock", __func__);
 305                 return MAX_PLL_CALC_ERROR;
 306         }
 307 
 308 /* 1) Find Post divider ranges */
 309         if (pll_settings->pix_clk_post_divider) {
 310                 min_post_divider = pll_settings->pix_clk_post_divider;
 311                 max_post_divider = pll_settings->pix_clk_post_divider;
 312         } else {
 313                 min_post_divider = calc_pll_cs->min_pix_clock_pll_post_divider;
 314                 if (min_post_divider * pll_settings->adjusted_pix_clk_100hz <
 315                                                 calc_pll_cs->min_vco_khz * 10) {
 316                         min_post_divider = calc_pll_cs->min_vco_khz * 10 /
 317                                         pll_settings->adjusted_pix_clk_100hz;
 318                         if ((min_post_divider *
 319                                         pll_settings->adjusted_pix_clk_100hz) <
 320                                                 calc_pll_cs->min_vco_khz * 10)
 321                                 min_post_divider++;
 322                 }
 323 
 324                 max_post_divider = calc_pll_cs->max_pix_clock_pll_post_divider;
 325                 if (max_post_divider * pll_settings->adjusted_pix_clk_100hz
 326                                 > calc_pll_cs->max_vco_khz * 10)
 327                         max_post_divider = calc_pll_cs->max_vco_khz * 10 /
 328                                         pll_settings->adjusted_pix_clk_100hz;
 329         }
 330 
 331 /* 2) Find Reference divider ranges
 332  * When SS is enabled, or for Display Port even without SS,
 333  * pll_settings->referenceDivider is not zero.
 334  * So calculate PPLL FB and fractional FB divider
 335  * using the passed reference divider*/
 336 
 337         if (pll_settings->reference_divider) {
 338                 min_ref_divider = pll_settings->reference_divider;
 339                 max_ref_divider = pll_settings->reference_divider;
 340         } else {
 341                 min_ref_divider = ((calc_pll_cs->ref_freq_khz
 342                                 / calc_pll_cs->max_pll_input_freq_khz)
 343                                 > calc_pll_cs->min_pll_ref_divider)
 344                         ? calc_pll_cs->ref_freq_khz
 345                                         / calc_pll_cs->max_pll_input_freq_khz
 346                         : calc_pll_cs->min_pll_ref_divider;
 347 
 348                 max_ref_divider = ((calc_pll_cs->ref_freq_khz
 349                                 / calc_pll_cs->min_pll_input_freq_khz)
 350                                 < calc_pll_cs->max_pll_ref_divider)
 351                         ? calc_pll_cs->ref_freq_khz /
 352                                         calc_pll_cs->min_pll_input_freq_khz
 353                         : calc_pll_cs->max_pll_ref_divider;
 354         }
 355 
 356 /* If some parameters are invalid we could have scenario when  "min">"max"
 357  * which produced endless loop later.
 358  * We should investigate why we get the wrong parameters.
 359  * But to follow the similar logic when "adjustedPixelClock" is set to be 0
 360  * it is better to return here than cause system hang/watchdog timeout later.
 361  *  ## SVS Wed 15 Jul 2009 */
 362 
 363         if (min_post_divider > max_post_divider) {
 364                 DC_LOG_ERROR(
 365                         "%s Post divider range is invalid", __func__);
 366                 return MAX_PLL_CALC_ERROR;
 367         }
 368 
 369         if (min_ref_divider > max_ref_divider) {
 370                 DC_LOG_ERROR(
 371                         "%s Reference divider range is invalid", __func__);
 372                 return MAX_PLL_CALC_ERROR;
 373         }
 374 
 375 /* 3) Try to find PLL dividers given ranges
 376  * starting with minimal error tolerance.
 377  * Increase error tolerance until PLL dividers found*/
 378         err_tolerance = MAX_PLL_CALC_ERROR;
 379 
 380         while (!calc_pll_dividers_in_range(
 381                         calc_pll_cs,
 382                         pll_settings,
 383                         min_ref_divider,
 384                         max_ref_divider,
 385                         min_post_divider,
 386                         max_post_divider,
 387                         err_tolerance))
 388                 err_tolerance += (err_tolerance > 10)
 389                                 ? (err_tolerance / 10)
 390                                 : 1;
 391 
 392         return err_tolerance;
 393 }
 394 
 395 static bool pll_adjust_pix_clk(
 396                 struct dce110_clk_src *clk_src,
 397                 struct pixel_clk_params *pix_clk_params,
 398                 struct pll_settings *pll_settings)
 399 {
 400         uint32_t actual_pix_clk_100hz = 0;
 401         uint32_t requested_clk_100hz = 0;
 402         struct bp_adjust_pixel_clock_parameters bp_adjust_pixel_clock_params = {
 403                                                         0 };
 404         enum bp_result bp_result;
 405         switch (pix_clk_params->signal_type) {
 406         case SIGNAL_TYPE_HDMI_TYPE_A: {
 407                 requested_clk_100hz = pix_clk_params->requested_pix_clk_100hz;
 408                 if (pix_clk_params->pixel_encoding != PIXEL_ENCODING_YCBCR422) {
 409                         switch (pix_clk_params->color_depth) {
 410                         case COLOR_DEPTH_101010:
 411                                 requested_clk_100hz = (requested_clk_100hz * 5) >> 2;
 412                                 break; /* x1.25*/
 413                         case COLOR_DEPTH_121212:
 414                                 requested_clk_100hz = (requested_clk_100hz * 6) >> 2;
 415                                 break; /* x1.5*/
 416                         case COLOR_DEPTH_161616:
 417                                 requested_clk_100hz = requested_clk_100hz * 2;
 418                                 break; /* x2.0*/
 419                         default:
 420                                 break;
 421                         }
 422                 }
 423                 actual_pix_clk_100hz = requested_clk_100hz;
 424         }
 425                 break;
 426 
 427         case SIGNAL_TYPE_DISPLAY_PORT:
 428         case SIGNAL_TYPE_DISPLAY_PORT_MST:
 429         case SIGNAL_TYPE_EDP:
 430                 requested_clk_100hz = pix_clk_params->requested_sym_clk * 10;
 431                 actual_pix_clk_100hz = pix_clk_params->requested_pix_clk_100hz;
 432                 break;
 433 
 434         default:
 435                 requested_clk_100hz = pix_clk_params->requested_pix_clk_100hz;
 436                 actual_pix_clk_100hz = pix_clk_params->requested_pix_clk_100hz;
 437                 break;
 438         }
 439 
 440         bp_adjust_pixel_clock_params.pixel_clock = requested_clk_100hz / 10;
 441         bp_adjust_pixel_clock_params.
 442                 encoder_object_id = pix_clk_params->encoder_object_id;
 443         bp_adjust_pixel_clock_params.signal_type = pix_clk_params->signal_type;
 444         bp_adjust_pixel_clock_params.
 445                 ss_enable = pix_clk_params->flags.ENABLE_SS;
 446         bp_result = clk_src->bios->funcs->adjust_pixel_clock(
 447                         clk_src->bios, &bp_adjust_pixel_clock_params);
 448         if (bp_result == BP_RESULT_OK) {
 449                 pll_settings->actual_pix_clk_100hz = actual_pix_clk_100hz;
 450                 pll_settings->adjusted_pix_clk_100hz =
 451                         bp_adjust_pixel_clock_params.adjusted_pixel_clock * 10;
 452                 pll_settings->reference_divider =
 453                         bp_adjust_pixel_clock_params.reference_divider;
 454                 pll_settings->pix_clk_post_divider =
 455                         bp_adjust_pixel_clock_params.pixel_clock_post_divider;
 456 
 457                 return true;
 458         }
 459 
 460         return false;
 461 }
 462 
 463 /**
 464  * Calculate PLL Dividers for given Clock Value.
 465  * First will call VBIOS Adjust Exec table to check if requested Pixel clock
 466  * will be Adjusted based on usage.
 467  * Then it will calculate PLL Dividers for this Adjusted clock using preferred
 468  * method (Maximum VCO frequency).
 469  *
 470  * \return
 471  *     Calculation error in units of 0.01%
 472  */
 473 
 474 static uint32_t dce110_get_pix_clk_dividers_helper (
 475                 struct dce110_clk_src *clk_src,
 476                 struct pll_settings *pll_settings,
 477                 struct pixel_clk_params *pix_clk_params)
 478 {
 479         uint32_t field = 0;
 480         uint32_t pll_calc_error = MAX_PLL_CALC_ERROR;
 481         DC_LOGGER_INIT();
 482         /* Check if reference clock is external (not pcie/xtalin)
 483         * HW Dce80 spec:
 484         * 00 - PCIE_REFCLK, 01 - XTALIN,    02 - GENERICA,    03 - GENERICB
 485         * 04 - HSYNCA,      05 - GENLK_CLK, 06 - PCIE_REFCLK, 07 - DVOCLK0 */
 486         REG_GET(PLL_CNTL, PLL_REF_DIV_SRC, &field);
 487         pll_settings->use_external_clk = (field > 1);
 488 
 489         /* VBIOS by default enables DP SS (spread on IDCLK) for DCE 8.0 always
 490          * (we do not care any more from SI for some older DP Sink which
 491          * does not report SS support, no known issues) */
 492         if ((pix_clk_params->flags.ENABLE_SS) ||
 493                         (dc_is_dp_signal(pix_clk_params->signal_type))) {
 494 
 495                 const struct spread_spectrum_data *ss_data = get_ss_data_entry(
 496                                         clk_src,
 497                                         pix_clk_params->signal_type,
 498                                         pll_settings->adjusted_pix_clk_100hz / 10);
 499 
 500                 if (NULL != ss_data)
 501                         pll_settings->ss_percentage = ss_data->percentage;
 502         }
 503 
 504         /* Check VBIOS AdjustPixelClock Exec table */
 505         if (!pll_adjust_pix_clk(clk_src, pix_clk_params, pll_settings)) {
 506                 /* Should never happen, ASSERT and fill up values to be able
 507                  * to continue. */
 508                 DC_LOG_ERROR(
 509                         "%s: Failed to adjust pixel clock!!", __func__);
 510                 pll_settings->actual_pix_clk_100hz =
 511                                 pix_clk_params->requested_pix_clk_100hz;
 512                 pll_settings->adjusted_pix_clk_100hz =
 513                                 pix_clk_params->requested_pix_clk_100hz;
 514 
 515                 if (dc_is_dp_signal(pix_clk_params->signal_type))
 516                         pll_settings->adjusted_pix_clk_100hz = 1000000;
 517         }
 518 
 519         /* Calculate Dividers */
 520         if (pix_clk_params->signal_type == SIGNAL_TYPE_HDMI_TYPE_A)
 521                 /*Calculate Dividers by HDMI object, no SS case or SS case */
 522                 pll_calc_error =
 523                         calculate_pixel_clock_pll_dividers(
 524                                         &clk_src->calc_pll_hdmi,
 525                                         pll_settings);
 526         else
 527                 /*Calculate Dividers by default object, no SS case or SS case */
 528                 pll_calc_error =
 529                         calculate_pixel_clock_pll_dividers(
 530                                         &clk_src->calc_pll,
 531                                         pll_settings);
 532 
 533         return pll_calc_error;
 534 }
 535 
 536 static void dce112_get_pix_clk_dividers_helper (
 537                 struct dce110_clk_src *clk_src,
 538                 struct pll_settings *pll_settings,
 539                 struct pixel_clk_params *pix_clk_params)
 540 {
 541         uint32_t actual_pixel_clock_100hz;
 542 
 543         actual_pixel_clock_100hz = pix_clk_params->requested_pix_clk_100hz;
 544         /* Calculate Dividers */
 545         if (pix_clk_params->signal_type == SIGNAL_TYPE_HDMI_TYPE_A) {
 546                 switch (pix_clk_params->color_depth) {
 547                 case COLOR_DEPTH_101010:
 548                         actual_pixel_clock_100hz = (actual_pixel_clock_100hz * 5) >> 2;
 549                         break;
 550                 case COLOR_DEPTH_121212:
 551                         actual_pixel_clock_100hz = (actual_pixel_clock_100hz * 6) >> 2;
 552                         break;
 553                 case COLOR_DEPTH_161616:
 554                         actual_pixel_clock_100hz = actual_pixel_clock_100hz * 2;
 555                         break;
 556                 default:
 557                         break;
 558                 }
 559         }
 560         pll_settings->actual_pix_clk_100hz = actual_pixel_clock_100hz;
 561         pll_settings->adjusted_pix_clk_100hz = actual_pixel_clock_100hz;
 562         pll_settings->calculated_pix_clk_100hz = pix_clk_params->requested_pix_clk_100hz;
 563 }
 564 
 565 static uint32_t dce110_get_pix_clk_dividers(
 566                 struct clock_source *cs,
 567                 struct pixel_clk_params *pix_clk_params,
 568                 struct pll_settings *pll_settings)
 569 {
 570         struct dce110_clk_src *clk_src = TO_DCE110_CLK_SRC(cs);
 571         uint32_t pll_calc_error = MAX_PLL_CALC_ERROR;
 572         DC_LOGGER_INIT();
 573 
 574         if (pix_clk_params == NULL || pll_settings == NULL
 575                         || pix_clk_params->requested_pix_clk_100hz == 0) {
 576                 DC_LOG_ERROR(
 577                         "%s: Invalid parameters!!\n", __func__);
 578                 return pll_calc_error;
 579         }
 580 
 581         memset(pll_settings, 0, sizeof(*pll_settings));
 582 
 583         if (cs->id == CLOCK_SOURCE_ID_DP_DTO ||
 584                         cs->id == CLOCK_SOURCE_ID_EXTERNAL) {
 585                 pll_settings->adjusted_pix_clk_100hz = clk_src->ext_clk_khz * 10;
 586                 pll_settings->calculated_pix_clk_100hz = clk_src->ext_clk_khz * 10;
 587                 pll_settings->actual_pix_clk_100hz =
 588                                         pix_clk_params->requested_pix_clk_100hz;
 589                 return 0;
 590         }
 591 
 592         pll_calc_error = dce110_get_pix_clk_dividers_helper(clk_src,
 593                         pll_settings, pix_clk_params);
 594 
 595         return pll_calc_error;
 596 }
 597 
 598 static uint32_t dce112_get_pix_clk_dividers(
 599                 struct clock_source *cs,
 600                 struct pixel_clk_params *pix_clk_params,
 601                 struct pll_settings *pll_settings)
 602 {
 603         struct dce110_clk_src *clk_src = TO_DCE110_CLK_SRC(cs);
 604         DC_LOGGER_INIT();
 605 
 606         if (pix_clk_params == NULL || pll_settings == NULL
 607                         || pix_clk_params->requested_pix_clk_100hz == 0) {
 608                 DC_LOG_ERROR(
 609                         "%s: Invalid parameters!!\n", __func__);
 610                 return -1;
 611         }
 612 
 613         memset(pll_settings, 0, sizeof(*pll_settings));
 614 
 615         if (cs->id == CLOCK_SOURCE_ID_DP_DTO ||
 616                         cs->id == CLOCK_SOURCE_ID_EXTERNAL) {
 617                 pll_settings->adjusted_pix_clk_100hz = clk_src->ext_clk_khz * 10;
 618                 pll_settings->calculated_pix_clk_100hz = clk_src->ext_clk_khz * 10;
 619                 pll_settings->actual_pix_clk_100hz =
 620                                         pix_clk_params->requested_pix_clk_100hz;
 621                 return -1;
 622         }
 623 
 624         dce112_get_pix_clk_dividers_helper(clk_src,
 625                         pll_settings, pix_clk_params);
 626 
 627         return 0;
 628 }
 629 
 630 static bool disable_spread_spectrum(struct dce110_clk_src *clk_src)
 631 {
 632         enum bp_result result;
 633         struct bp_spread_spectrum_parameters bp_ss_params = {0};
 634 
 635         bp_ss_params.pll_id = clk_src->base.id;
 636 
 637         /*Call ASICControl to process ATOMBIOS Exec table*/
 638         result = clk_src->bios->funcs->enable_spread_spectrum_on_ppll(
 639                         clk_src->bios,
 640                         &bp_ss_params,
 641                         false);
 642 
 643         return result == BP_RESULT_OK;
 644 }
 645 
 646 static bool calculate_ss(
 647                 const struct pll_settings *pll_settings,
 648                 const struct spread_spectrum_data *ss_data,
 649                 struct delta_sigma_data *ds_data)
 650 {
 651         struct fixed31_32 fb_div;
 652         struct fixed31_32 ss_amount;
 653         struct fixed31_32 ss_nslip_amount;
 654         struct fixed31_32 ss_ds_frac_amount;
 655         struct fixed31_32 ss_step_size;
 656         struct fixed31_32 modulation_time;
 657 
 658         if (ds_data == NULL)
 659                 return false;
 660         if (ss_data == NULL)
 661                 return false;
 662         if (ss_data->percentage == 0)
 663                 return false;
 664         if (pll_settings == NULL)
 665                 return false;
 666 
 667         memset(ds_data, 0, sizeof(struct delta_sigma_data));
 668 
 669         /* compute SS_AMOUNT_FBDIV & SS_AMOUNT_NFRAC_SLIP & SS_AMOUNT_DSFRAC*/
 670         /* 6 decimal point support in fractional feedback divider */
 671         fb_div  = dc_fixpt_from_fraction(
 672                 pll_settings->fract_feedback_divider, 1000000);
 673         fb_div = dc_fixpt_add_int(fb_div, pll_settings->feedback_divider);
 674 
 675         ds_data->ds_frac_amount = 0;
 676         /*spreadSpectrumPercentage is in the unit of .01%,
 677          * so have to divided by 100 * 100*/
 678         ss_amount = dc_fixpt_mul(
 679                 fb_div, dc_fixpt_from_fraction(ss_data->percentage,
 680                                         100 * ss_data->percentage_divider));
 681         ds_data->feedback_amount = dc_fixpt_floor(ss_amount);
 682 
 683         ss_nslip_amount = dc_fixpt_sub(ss_amount,
 684                 dc_fixpt_from_int(ds_data->feedback_amount));
 685         ss_nslip_amount = dc_fixpt_mul_int(ss_nslip_amount, 10);
 686         ds_data->nfrac_amount = dc_fixpt_floor(ss_nslip_amount);
 687 
 688         ss_ds_frac_amount = dc_fixpt_sub(ss_nslip_amount,
 689                 dc_fixpt_from_int(ds_data->nfrac_amount));
 690         ss_ds_frac_amount = dc_fixpt_mul_int(ss_ds_frac_amount, 65536);
 691         ds_data->ds_frac_amount = dc_fixpt_floor(ss_ds_frac_amount);
 692 
 693         /* compute SS_STEP_SIZE_DSFRAC */
 694         modulation_time = dc_fixpt_from_fraction(
 695                 pll_settings->reference_freq * 1000,
 696                 pll_settings->reference_divider * ss_data->modulation_freq_hz);
 697 
 698         if (ss_data->flags.CENTER_SPREAD)
 699                 modulation_time = dc_fixpt_div_int(modulation_time, 4);
 700         else
 701                 modulation_time = dc_fixpt_div_int(modulation_time, 2);
 702 
 703         ss_step_size = dc_fixpt_div(ss_amount, modulation_time);
 704         /* SS_STEP_SIZE_DSFRAC_DEC = Int(SS_STEP_SIZE * 2 ^ 16 * 10)*/
 705         ss_step_size = dc_fixpt_mul_int(ss_step_size, 65536 * 10);
 706         ds_data->ds_frac_size =  dc_fixpt_floor(ss_step_size);
 707 
 708         return true;
 709 }
 710 
 711 static bool enable_spread_spectrum(
 712                 struct dce110_clk_src *clk_src,
 713                 enum signal_type signal, struct pll_settings *pll_settings)
 714 {
 715         struct bp_spread_spectrum_parameters bp_params = {0};
 716         struct delta_sigma_data d_s_data;
 717         const struct spread_spectrum_data *ss_data = NULL;
 718 
 719         ss_data = get_ss_data_entry(
 720                         clk_src,
 721                         signal,
 722                         pll_settings->calculated_pix_clk_100hz / 10);
 723 
 724 /* Pixel clock PLL has been programmed to generate desired pixel clock,
 725  * now enable SS on pixel clock */
 726 /* TODO is it OK to return true not doing anything ??*/
 727         if (ss_data != NULL && pll_settings->ss_percentage != 0) {
 728                 if (calculate_ss(pll_settings, ss_data, &d_s_data)) {
 729                         bp_params.ds.feedback_amount =
 730                                         d_s_data.feedback_amount;
 731                         bp_params.ds.nfrac_amount =
 732                                         d_s_data.nfrac_amount;
 733                         bp_params.ds.ds_frac_size = d_s_data.ds_frac_size;
 734                         bp_params.ds_frac_amount =
 735                                         d_s_data.ds_frac_amount;
 736                         bp_params.flags.DS_TYPE = 1;
 737                         bp_params.pll_id = clk_src->base.id;
 738                         bp_params.percentage = ss_data->percentage;
 739                         if (ss_data->flags.CENTER_SPREAD)
 740                                 bp_params.flags.CENTER_SPREAD = 1;
 741                         if (ss_data->flags.EXTERNAL_SS)
 742                                 bp_params.flags.EXTERNAL_SS = 1;
 743 
 744                         if (BP_RESULT_OK !=
 745                                 clk_src->bios->funcs->
 746                                         enable_spread_spectrum_on_ppll(
 747                                                         clk_src->bios,
 748                                                         &bp_params,
 749                                                         true))
 750                                 return false;
 751                 } else
 752                         return false;
 753         }
 754         return true;
 755 }
 756 
 757 static void dce110_program_pixel_clk_resync(
 758                 struct dce110_clk_src *clk_src,
 759                 enum signal_type signal_type,
 760                 enum dc_color_depth colordepth)
 761 {
 762         REG_UPDATE(RESYNC_CNTL,
 763                         DCCG_DEEP_COLOR_CNTL1, 0);
 764         /*
 765          24 bit mode: TMDS clock = 1.0 x pixel clock  (1:1)
 766          30 bit mode: TMDS clock = 1.25 x pixel clock (5:4)
 767          36 bit mode: TMDS clock = 1.5 x pixel clock  (3:2)
 768          48 bit mode: TMDS clock = 2 x pixel clock    (2:1)
 769          */
 770         if (signal_type != SIGNAL_TYPE_HDMI_TYPE_A)
 771                 return;
 772 
 773         switch (colordepth) {
 774         case COLOR_DEPTH_888:
 775                 REG_UPDATE(RESYNC_CNTL,
 776                                 DCCG_DEEP_COLOR_CNTL1, 0);
 777                 break;
 778         case COLOR_DEPTH_101010:
 779                 REG_UPDATE(RESYNC_CNTL,
 780                                 DCCG_DEEP_COLOR_CNTL1, 1);
 781                 break;
 782         case COLOR_DEPTH_121212:
 783                 REG_UPDATE(RESYNC_CNTL,
 784                                 DCCG_DEEP_COLOR_CNTL1, 2);
 785                 break;
 786         case COLOR_DEPTH_161616:
 787                 REG_UPDATE(RESYNC_CNTL,
 788                                 DCCG_DEEP_COLOR_CNTL1, 3);
 789                 break;
 790         default:
 791                 break;
 792         }
 793 }
 794 
 795 static void dce112_program_pixel_clk_resync(
 796                 struct dce110_clk_src *clk_src,
 797                 enum signal_type signal_type,
 798                 enum dc_color_depth colordepth,
 799                 bool enable_ycbcr420)
 800 {
 801         uint32_t deep_color_cntl = 0;
 802         uint32_t double_rate_enable = 0;
 803 
 804         /*
 805          24 bit mode: TMDS clock = 1.0 x pixel clock  (1:1)
 806          30 bit mode: TMDS clock = 1.25 x pixel clock (5:4)
 807          36 bit mode: TMDS clock = 1.5 x pixel clock  (3:2)
 808          48 bit mode: TMDS clock = 2 x pixel clock    (2:1)
 809          */
 810         if (signal_type == SIGNAL_TYPE_HDMI_TYPE_A) {
 811                 double_rate_enable = enable_ycbcr420 ? 1 : 0;
 812 
 813                 switch (colordepth) {
 814                 case COLOR_DEPTH_888:
 815                         deep_color_cntl = 0;
 816                         break;
 817                 case COLOR_DEPTH_101010:
 818                         deep_color_cntl = 1;
 819                         break;
 820                 case COLOR_DEPTH_121212:
 821                         deep_color_cntl = 2;
 822                         break;
 823                 case COLOR_DEPTH_161616:
 824                         deep_color_cntl = 3;
 825                         break;
 826                 default:
 827                         break;
 828                 }
 829         }
 830 
 831         if (clk_src->cs_mask->PHYPLLA_PIXCLK_DOUBLE_RATE_ENABLE)
 832                 REG_UPDATE_2(PIXCLK_RESYNC_CNTL,
 833                                 PHYPLLA_DCCG_DEEP_COLOR_CNTL, deep_color_cntl,
 834                                 PHYPLLA_PIXCLK_DOUBLE_RATE_ENABLE, double_rate_enable);
 835         else
 836                 REG_UPDATE(PIXCLK_RESYNC_CNTL,
 837                                 PHYPLLA_DCCG_DEEP_COLOR_CNTL, deep_color_cntl);
 838 
 839 }
 840 
 841 static bool dce110_program_pix_clk(
 842                 struct clock_source *clock_source,
 843                 struct pixel_clk_params *pix_clk_params,
 844                 struct pll_settings *pll_settings)
 845 {
 846         struct dce110_clk_src *clk_src = TO_DCE110_CLK_SRC(clock_source);
 847         struct bp_pixel_clock_parameters bp_pc_params = {0};
 848 
 849         /* First disable SS
 850          * ATOMBIOS will enable by default SS on PLL for DP,
 851          * do not disable it here
 852          */
 853         if (clock_source->id != CLOCK_SOURCE_ID_EXTERNAL &&
 854                         !dc_is_dp_signal(pix_clk_params->signal_type) &&
 855                         clock_source->ctx->dce_version <= DCE_VERSION_11_0)
 856                 disable_spread_spectrum(clk_src);
 857 
 858         /*ATOMBIOS expects pixel rate adjusted by deep color ratio)*/
 859         bp_pc_params.controller_id = pix_clk_params->controller_id;
 860         bp_pc_params.pll_id = clock_source->id;
 861         bp_pc_params.target_pixel_clock_100hz = pll_settings->actual_pix_clk_100hz;
 862         bp_pc_params.encoder_object_id = pix_clk_params->encoder_object_id;
 863         bp_pc_params.signal_type = pix_clk_params->signal_type;
 864 
 865         bp_pc_params.reference_divider = pll_settings->reference_divider;
 866         bp_pc_params.feedback_divider = pll_settings->feedback_divider;
 867         bp_pc_params.fractional_feedback_divider =
 868                         pll_settings->fract_feedback_divider;
 869         bp_pc_params.pixel_clock_post_divider =
 870                         pll_settings->pix_clk_post_divider;
 871         bp_pc_params.flags.SET_EXTERNAL_REF_DIV_SRC =
 872                                         pll_settings->use_external_clk;
 873 
 874         if (clk_src->bios->funcs->set_pixel_clock(
 875                         clk_src->bios, &bp_pc_params) != BP_RESULT_OK)
 876                 return false;
 877         /* Enable SS
 878          * ATOMBIOS will enable by default SS for DP on PLL ( DP ID clock),
 879          * based on HW display PLL team, SS control settings should be programmed
 880          * during PLL Reset, but they do not have effect
 881          * until SS_EN is asserted.*/
 882         if (clock_source->id != CLOCK_SOURCE_ID_EXTERNAL
 883                         && !dc_is_dp_signal(pix_clk_params->signal_type)) {
 884 
 885                 if (pix_clk_params->flags.ENABLE_SS)
 886                         if (!enable_spread_spectrum(clk_src,
 887                                                         pix_clk_params->signal_type,
 888                                                         pll_settings))
 889                                 return false;
 890 
 891                 /* Resync deep color DTO */
 892                 dce110_program_pixel_clk_resync(clk_src,
 893                                         pix_clk_params->signal_type,
 894                                         pix_clk_params->color_depth);
 895         }
 896 
 897         return true;
 898 }
 899 
 900 static bool dce112_program_pix_clk(
 901                 struct clock_source *clock_source,
 902                 struct pixel_clk_params *pix_clk_params,
 903                 struct pll_settings *pll_settings)
 904 {
 905         struct dce110_clk_src *clk_src = TO_DCE110_CLK_SRC(clock_source);
 906         struct bp_pixel_clock_parameters bp_pc_params = {0};
 907 
 908 #if defined(CONFIG_DRM_AMD_DC_DCN1_0)
 909         if (IS_FPGA_MAXIMUS_DC(clock_source->ctx->dce_environment)) {
 910                 unsigned int inst = pix_clk_params->controller_id - CONTROLLER_ID_D0;
 911                 unsigned dp_dto_ref_100hz = 7000000;
 912                 unsigned clock_100hz = pll_settings->actual_pix_clk_100hz;
 913 
 914                 /* Set DTO values: phase = target clock, modulo = reference clock */
 915                 REG_WRITE(PHASE[inst], clock_100hz);
 916                 REG_WRITE(MODULO[inst], dp_dto_ref_100hz);
 917 
 918                 /* Enable DTO */
 919                 REG_UPDATE(PIXEL_RATE_CNTL[inst], DP_DTO0_ENABLE, 1);
 920                 return true;
 921         }
 922 #endif
 923         /* First disable SS
 924          * ATOMBIOS will enable by default SS on PLL for DP,
 925          * do not disable it here
 926          */
 927         if (clock_source->id != CLOCK_SOURCE_ID_EXTERNAL &&
 928                         !dc_is_dp_signal(pix_clk_params->signal_type) &&
 929                         clock_source->ctx->dce_version <= DCE_VERSION_11_0)
 930                 disable_spread_spectrum(clk_src);
 931 
 932         /*ATOMBIOS expects pixel rate adjusted by deep color ratio)*/
 933         bp_pc_params.controller_id = pix_clk_params->controller_id;
 934         bp_pc_params.pll_id = clock_source->id;
 935         bp_pc_params.target_pixel_clock_100hz = pll_settings->actual_pix_clk_100hz;
 936         bp_pc_params.encoder_object_id = pix_clk_params->encoder_object_id;
 937         bp_pc_params.signal_type = pix_clk_params->signal_type;
 938 
 939         if (clock_source->id != CLOCK_SOURCE_ID_DP_DTO) {
 940                 bp_pc_params.flags.SET_GENLOCK_REF_DIV_SRC =
 941                                                 pll_settings->use_external_clk;
 942                 bp_pc_params.flags.SET_XTALIN_REF_SRC =
 943                                                 !pll_settings->use_external_clk;
 944                 if (pix_clk_params->flags.SUPPORT_YCBCR420) {
 945                         bp_pc_params.flags.SUPPORT_YUV_420 = 1;
 946                 }
 947         }
 948         if (clk_src->bios->funcs->set_pixel_clock(
 949                         clk_src->bios, &bp_pc_params) != BP_RESULT_OK)
 950                 return false;
 951         /* Resync deep color DTO */
 952         if (clock_source->id != CLOCK_SOURCE_ID_DP_DTO)
 953                 dce112_program_pixel_clk_resync(clk_src,
 954                                         pix_clk_params->signal_type,
 955                                         pix_clk_params->color_depth,
 956                                         pix_clk_params->flags.SUPPORT_YCBCR420);
 957 
 958         return true;
 959 }
 960 
 961 
 962 static bool dce110_clock_source_power_down(
 963                 struct clock_source *clk_src)
 964 {
 965         struct dce110_clk_src *dce110_clk_src = TO_DCE110_CLK_SRC(clk_src);
 966         enum bp_result bp_result;
 967         struct bp_pixel_clock_parameters bp_pixel_clock_params = {0};
 968 
 969         if (clk_src->dp_clk_src)
 970                 return true;
 971 
 972         /* If Pixel Clock is 0 it means Power Down Pll*/
 973         bp_pixel_clock_params.controller_id = CONTROLLER_ID_UNDEFINED;
 974         bp_pixel_clock_params.pll_id = clk_src->id;
 975         bp_pixel_clock_params.flags.FORCE_PROGRAMMING_OF_PLL = 1;
 976 
 977         /*Call ASICControl to process ATOMBIOS Exec table*/
 978         bp_result = dce110_clk_src->bios->funcs->set_pixel_clock(
 979                         dce110_clk_src->bios,
 980                         &bp_pixel_clock_params);
 981 
 982         return bp_result == BP_RESULT_OK;
 983 }
 984 
 985 static bool get_pixel_clk_frequency_100hz(
 986                 const struct clock_source *clock_source,
 987                 unsigned int inst,
 988                 unsigned int *pixel_clk_khz)
 989 {
 990         struct dce110_clk_src *clk_src = TO_DCE110_CLK_SRC(clock_source);
 991         unsigned int clock_hz = 0;
 992 
 993         if (clock_source->id == CLOCK_SOURCE_ID_DP_DTO) {
 994                 clock_hz = REG_READ(PHASE[inst]);
 995 
 996                 /* NOTE: There is agreement with VBIOS here that MODULO is
 997                  * programmed equal to DPREFCLK, in which case PHASE will be
 998                  * equivalent to pixel clock.
 999                  */
1000                 *pixel_clk_khz = clock_hz / 100;
1001                 return true;
1002         }
1003 
1004         return false;
1005 }
1006 
1007 #if defined(CONFIG_DRM_AMD_DC_DCN2_0)
1008 
1009 /* this table is use to find *1.001 and /1.001 pixel rates from non-precise pixel rate */
1010 struct pixel_rate_range_table_entry {
1011         unsigned int range_min_khz;
1012         unsigned int range_max_khz;
1013         unsigned int target_pixel_rate_khz;
1014         unsigned short mult_factor;
1015         unsigned short div_factor;
1016 };
1017 
1018 static const struct pixel_rate_range_table_entry video_optimized_pixel_rates[] = {
1019         // /1.001 rates
1020         {25170, 25180, 25200, 1000, 1001},      //25.2MHz   ->   25.17
1021         {59340, 59350, 59400, 1000, 1001},      //59.4Mhz   ->   59.340
1022         {74170, 74180, 74250, 1000, 1001},      //74.25Mhz  ->   74.1758
1023         {125870, 125880, 126000, 1000, 1001},   //126Mhz    ->  125.87
1024         {148350, 148360, 148500, 1000, 1001},   //148.5Mhz  ->  148.3516
1025         {167830, 167840, 168000, 1000, 1001},   //168Mhz    ->  167.83
1026         {222520, 222530, 222750, 1000, 1001},   //222.75Mhz ->  222.527
1027         {257140, 257150, 257400, 1000, 1001},   //257.4Mhz  ->  257.1429
1028         {296700, 296710, 297000, 1000, 1001},   //297Mhz    ->  296.7033
1029         {342850, 342860, 343200, 1000, 1001},   //343.2Mhz  ->  342.857
1030         {395600, 395610, 396000, 1000, 1001},   //396Mhz    ->  395.6
1031         {409090, 409100, 409500, 1000, 1001},   //409.5Mhz  ->  409.091
1032         {445050, 445060, 445500, 1000, 1001},   //445.5Mhz  ->  445.055
1033         {467530, 467540, 468000, 1000, 1001},   //468Mhz    ->  467.5325
1034         {519230, 519240, 519750, 1000, 1001},   //519.75Mhz ->  519.231
1035         {525970, 525980, 526500, 1000, 1001},   //526.5Mhz  ->  525.974
1036         {545450, 545460, 546000, 1000, 1001},   //546Mhz    ->  545.455
1037         {593400, 593410, 594000, 1000, 1001},   //594Mhz    ->  593.4066
1038         {623370, 623380, 624000, 1000, 1001},   //624Mhz    ->  623.377
1039         {692300, 692310, 693000, 1000, 1001},   //693Mhz    ->  692.308
1040         {701290, 701300, 702000, 1000, 1001},   //702Mhz    ->  701.2987
1041         {791200, 791210, 792000, 1000, 1001},   //792Mhz    ->  791.209
1042         {890100, 890110, 891000, 1000, 1001},   //891Mhz    ->  890.1099
1043         {1186810, 1186820, 1188000, 1000, 1001},//1188Mhz   -> 1186.8131
1044 
1045         // *1.001 rates
1046         {27020, 27030, 27000, 1001, 1000}, //27Mhz
1047         {54050, 54060, 54000, 1001, 1000}, //54Mhz
1048         {108100, 108110, 108000, 1001, 1000},//108Mhz
1049 };
1050 
1051 static bool dcn20_program_pix_clk(
1052                 struct clock_source *clock_source,
1053                 struct pixel_clk_params *pix_clk_params,
1054                 struct pll_settings *pll_settings)
1055 {
1056         dce112_program_pix_clk(clock_source, pix_clk_params, pll_settings);
1057 
1058         return true;
1059 }
1060 
1061 static const struct clock_source_funcs dcn20_clk_src_funcs = {
1062         .cs_power_down = dce110_clock_source_power_down,
1063         .program_pix_clk = dcn20_program_pix_clk,
1064         .get_pix_clk_dividers = dce112_get_pix_clk_dividers,
1065         .get_pixel_clk_frequency_100hz = get_pixel_clk_frequency_100hz
1066 };
1067 #endif
1068 
1069 /*****************************************/
1070 /* Constructor                           */
1071 /*****************************************/
1072 
1073 static const struct clock_source_funcs dce112_clk_src_funcs = {
1074         .cs_power_down = dce110_clock_source_power_down,
1075         .program_pix_clk = dce112_program_pix_clk,
1076         .get_pix_clk_dividers = dce112_get_pix_clk_dividers,
1077         .get_pixel_clk_frequency_100hz = get_pixel_clk_frequency_100hz
1078 };
1079 static const struct clock_source_funcs dce110_clk_src_funcs = {
1080         .cs_power_down = dce110_clock_source_power_down,
1081         .program_pix_clk = dce110_program_pix_clk,
1082         .get_pix_clk_dividers = dce110_get_pix_clk_dividers,
1083         .get_pixel_clk_frequency_100hz = get_pixel_clk_frequency_100hz
1084 };
1085 
1086 
1087 static void get_ss_info_from_atombios(
1088                 struct dce110_clk_src *clk_src,
1089                 enum as_signal_type as_signal,
1090                 struct spread_spectrum_data *spread_spectrum_data[],
1091                 uint32_t *ss_entries_num)
1092 {
1093         enum bp_result bp_result = BP_RESULT_FAILURE;
1094         struct spread_spectrum_info *ss_info;
1095         struct spread_spectrum_data *ss_data;
1096         struct spread_spectrum_info *ss_info_cur;
1097         struct spread_spectrum_data *ss_data_cur;
1098         uint32_t i;
1099         DC_LOGGER_INIT();
1100         if (ss_entries_num == NULL) {
1101                 DC_LOG_SYNC(
1102                         "Invalid entry !!!\n");
1103                 return;
1104         }
1105         if (spread_spectrum_data == NULL) {
1106                 DC_LOG_SYNC(
1107                         "Invalid array pointer!!!\n");
1108                 return;
1109         }
1110 
1111         spread_spectrum_data[0] = NULL;
1112         *ss_entries_num = 0;
1113 
1114         *ss_entries_num = clk_src->bios->funcs->get_ss_entry_number(
1115                         clk_src->bios,
1116                         as_signal);
1117 
1118         if (*ss_entries_num == 0)
1119                 return;
1120 
1121         ss_info = kcalloc(*ss_entries_num,
1122                           sizeof(struct spread_spectrum_info),
1123                           GFP_KERNEL);
1124         ss_info_cur = ss_info;
1125         if (ss_info == NULL)
1126                 return;
1127 
1128         ss_data = kcalloc(*ss_entries_num,
1129                           sizeof(struct spread_spectrum_data),
1130                           GFP_KERNEL);
1131         if (ss_data == NULL)
1132                 goto out_free_info;
1133 
1134         for (i = 0, ss_info_cur = ss_info;
1135                 i < (*ss_entries_num);
1136                 ++i, ++ss_info_cur) {
1137 
1138                 bp_result = clk_src->bios->funcs->get_spread_spectrum_info(
1139                                 clk_src->bios,
1140                                 as_signal,
1141                                 i,
1142                                 ss_info_cur);
1143 
1144                 if (bp_result != BP_RESULT_OK)
1145                         goto out_free_data;
1146         }
1147 
1148         for (i = 0, ss_info_cur = ss_info, ss_data_cur = ss_data;
1149                 i < (*ss_entries_num);
1150                 ++i, ++ss_info_cur, ++ss_data_cur) {
1151 
1152                 if (ss_info_cur->type.STEP_AND_DELAY_INFO != false) {
1153                         DC_LOG_SYNC(
1154                                 "Invalid ATOMBIOS SS Table!!!\n");
1155                         goto out_free_data;
1156                 }
1157 
1158                 /* for HDMI check SS percentage,
1159                  * if it is > 6 (0.06%), the ATOMBIOS table info is invalid*/
1160                 if (as_signal == AS_SIGNAL_TYPE_HDMI
1161                                 && ss_info_cur->spread_spectrum_percentage > 6){
1162                         /* invalid input, do nothing */
1163                         DC_LOG_SYNC(
1164                                 "Invalid SS percentage ");
1165                         DC_LOG_SYNC(
1166                                 "for HDMI in ATOMBIOS info Table!!!\n");
1167                         continue;
1168                 }
1169                 if (ss_info_cur->spread_percentage_divider == 1000) {
1170                         /* Keep previous precision from ATOMBIOS for these
1171                         * in case new precision set by ATOMBIOS for these
1172                         * (otherwise all code in DCE specific classes
1173                         * for all previous ASICs would need
1174                         * to be updated for SS calculations,
1175                         * Audio SS compensation and DP DTO SS compensation
1176                         * which assumes fixed SS percentage Divider = 100)*/
1177                         ss_info_cur->spread_spectrum_percentage /= 10;
1178                         ss_info_cur->spread_percentage_divider = 100;
1179                 }
1180 
1181                 ss_data_cur->freq_range_khz = ss_info_cur->target_clock_range;
1182                 ss_data_cur->percentage =
1183                                 ss_info_cur->spread_spectrum_percentage;
1184                 ss_data_cur->percentage_divider =
1185                                 ss_info_cur->spread_percentage_divider;
1186                 ss_data_cur->modulation_freq_hz =
1187                                 ss_info_cur->spread_spectrum_range;
1188 
1189                 if (ss_info_cur->type.CENTER_MODE)
1190                         ss_data_cur->flags.CENTER_SPREAD = 1;
1191 
1192                 if (ss_info_cur->type.EXTERNAL)
1193                         ss_data_cur->flags.EXTERNAL_SS = 1;
1194 
1195         }
1196 
1197         *spread_spectrum_data = ss_data;
1198         kfree(ss_info);
1199         return;
1200 
1201 out_free_data:
1202         kfree(ss_data);
1203         *ss_entries_num = 0;
1204 out_free_info:
1205         kfree(ss_info);
1206 }
1207 
1208 static void ss_info_from_atombios_create(
1209         struct dce110_clk_src *clk_src)
1210 {
1211         get_ss_info_from_atombios(
1212                 clk_src,
1213                 AS_SIGNAL_TYPE_DISPLAY_PORT,
1214                 &clk_src->dp_ss_params,
1215                 &clk_src->dp_ss_params_cnt);
1216         get_ss_info_from_atombios(
1217                 clk_src,
1218                 AS_SIGNAL_TYPE_HDMI,
1219                 &clk_src->hdmi_ss_params,
1220                 &clk_src->hdmi_ss_params_cnt);
1221         get_ss_info_from_atombios(
1222                 clk_src,
1223                 AS_SIGNAL_TYPE_DVI,
1224                 &clk_src->dvi_ss_params,
1225                 &clk_src->dvi_ss_params_cnt);
1226         get_ss_info_from_atombios(
1227                 clk_src,
1228                 AS_SIGNAL_TYPE_LVDS,
1229                 &clk_src->lvds_ss_params,
1230                 &clk_src->lvds_ss_params_cnt);
1231 }
1232 
1233 static bool calc_pll_max_vco_construct(
1234                         struct calc_pll_clock_source *calc_pll_cs,
1235                         struct calc_pll_clock_source_init_data *init_data)
1236 {
1237         uint32_t i;
1238         struct dc_firmware_info *fw_info;
1239         if (calc_pll_cs == NULL ||
1240                         init_data == NULL ||
1241                         init_data->bp == NULL)
1242                 return false;
1243 
1244         if (!init_data->bp->fw_info_valid)
1245                 return false;
1246 
1247         fw_info = &init_data->bp->fw_info;
1248         calc_pll_cs->ctx = init_data->ctx;
1249         calc_pll_cs->ref_freq_khz = fw_info->pll_info.crystal_frequency;
1250         calc_pll_cs->min_vco_khz =
1251                         fw_info->pll_info.min_output_pxl_clk_pll_frequency;
1252         calc_pll_cs->max_vco_khz =
1253                         fw_info->pll_info.max_output_pxl_clk_pll_frequency;
1254 
1255         if (init_data->max_override_input_pxl_clk_pll_freq_khz != 0)
1256                 calc_pll_cs->max_pll_input_freq_khz =
1257                         init_data->max_override_input_pxl_clk_pll_freq_khz;
1258         else
1259                 calc_pll_cs->max_pll_input_freq_khz =
1260                         fw_info->pll_info.max_input_pxl_clk_pll_frequency;
1261 
1262         if (init_data->min_override_input_pxl_clk_pll_freq_khz != 0)
1263                 calc_pll_cs->min_pll_input_freq_khz =
1264                         init_data->min_override_input_pxl_clk_pll_freq_khz;
1265         else
1266                 calc_pll_cs->min_pll_input_freq_khz =
1267                         fw_info->pll_info.min_input_pxl_clk_pll_frequency;
1268 
1269         calc_pll_cs->min_pix_clock_pll_post_divider =
1270                         init_data->min_pix_clk_pll_post_divider;
1271         calc_pll_cs->max_pix_clock_pll_post_divider =
1272                         init_data->max_pix_clk_pll_post_divider;
1273         calc_pll_cs->min_pll_ref_divider =
1274                         init_data->min_pll_ref_divider;
1275         calc_pll_cs->max_pll_ref_divider =
1276                         init_data->max_pll_ref_divider;
1277 
1278         if (init_data->num_fract_fb_divider_decimal_point == 0 ||
1279                 init_data->num_fract_fb_divider_decimal_point_precision >
1280                                 init_data->num_fract_fb_divider_decimal_point) {
1281                 DC_LOG_ERROR(
1282                         "The dec point num or precision is incorrect!");
1283                 return false;
1284         }
1285         if (init_data->num_fract_fb_divider_decimal_point_precision == 0) {
1286                 DC_LOG_ERROR(
1287                         "Incorrect fract feedback divider precision num!");
1288                 return false;
1289         }
1290 
1291         calc_pll_cs->fract_fb_divider_decimal_points_num =
1292                                 init_data->num_fract_fb_divider_decimal_point;
1293         calc_pll_cs->fract_fb_divider_precision =
1294                         init_data->num_fract_fb_divider_decimal_point_precision;
1295         calc_pll_cs->fract_fb_divider_factor = 1;
1296         for (i = 0; i < calc_pll_cs->fract_fb_divider_decimal_points_num; ++i)
1297                 calc_pll_cs->fract_fb_divider_factor *= 10;
1298 
1299         calc_pll_cs->fract_fb_divider_precision_factor = 1;
1300         for (
1301                 i = 0;
1302                 i < (calc_pll_cs->fract_fb_divider_decimal_points_num -
1303                                 calc_pll_cs->fract_fb_divider_precision);
1304                 ++i)
1305                 calc_pll_cs->fract_fb_divider_precision_factor *= 10;
1306 
1307         return true;
1308 }
1309 
1310 bool dce110_clk_src_construct(
1311         struct dce110_clk_src *clk_src,
1312         struct dc_context *ctx,
1313         struct dc_bios *bios,
1314         enum clock_source_id id,
1315         const struct dce110_clk_src_regs *regs,
1316         const struct dce110_clk_src_shift *cs_shift,
1317         const struct dce110_clk_src_mask *cs_mask)
1318 {
1319         struct calc_pll_clock_source_init_data calc_pll_cs_init_data_hdmi;
1320         struct calc_pll_clock_source_init_data calc_pll_cs_init_data;
1321 
1322         clk_src->base.ctx = ctx;
1323         clk_src->bios = bios;
1324         clk_src->base.id = id;
1325         clk_src->base.funcs = &dce110_clk_src_funcs;
1326 
1327         clk_src->regs = regs;
1328         clk_src->cs_shift = cs_shift;
1329         clk_src->cs_mask = cs_mask;
1330 
1331         if (!clk_src->bios->fw_info_valid) {
1332                 ASSERT_CRITICAL(false);
1333                 goto unexpected_failure;
1334         }
1335 
1336         clk_src->ext_clk_khz = clk_src->bios->fw_info.external_clock_source_frequency_for_dp;
1337 
1338         /* structure normally used with PLL ranges from ATOMBIOS; DS on by default */
1339         calc_pll_cs_init_data.bp = bios;
1340         calc_pll_cs_init_data.min_pix_clk_pll_post_divider = 1;
1341         calc_pll_cs_init_data.max_pix_clk_pll_post_divider =
1342                         clk_src->cs_mask->PLL_POST_DIV_PIXCLK;
1343         calc_pll_cs_init_data.min_pll_ref_divider =     1;
1344         calc_pll_cs_init_data.max_pll_ref_divider =     clk_src->cs_mask->PLL_REF_DIV;
1345         /* when 0 use minInputPxlClkPLLFrequencyInKHz from firmwareInfo*/
1346         calc_pll_cs_init_data.min_override_input_pxl_clk_pll_freq_khz = 0;
1347         /* when 0 use maxInputPxlClkPLLFrequencyInKHz from firmwareInfo*/
1348         calc_pll_cs_init_data.max_override_input_pxl_clk_pll_freq_khz = 0;
1349         /*numberOfFractFBDividerDecimalPoints*/
1350         calc_pll_cs_init_data.num_fract_fb_divider_decimal_point =
1351                         FRACT_FB_DIVIDER_DEC_POINTS_MAX_NUM;
1352         /*number of decimal point to round off for fractional feedback divider value*/
1353         calc_pll_cs_init_data.num_fract_fb_divider_decimal_point_precision =
1354                         FRACT_FB_DIVIDER_DEC_POINTS_MAX_NUM;
1355         calc_pll_cs_init_data.ctx =     ctx;
1356 
1357         /*structure for HDMI, no SS or SS% <= 0.06% for 27 MHz Ref clock */
1358         calc_pll_cs_init_data_hdmi.bp = bios;
1359         calc_pll_cs_init_data_hdmi.min_pix_clk_pll_post_divider = 1;
1360         calc_pll_cs_init_data_hdmi.max_pix_clk_pll_post_divider =
1361                         clk_src->cs_mask->PLL_POST_DIV_PIXCLK;
1362         calc_pll_cs_init_data_hdmi.min_pll_ref_divider = 1;
1363         calc_pll_cs_init_data_hdmi.max_pll_ref_divider = clk_src->cs_mask->PLL_REF_DIV;
1364         /* when 0 use minInputPxlClkPLLFrequencyInKHz from firmwareInfo*/
1365         calc_pll_cs_init_data_hdmi.min_override_input_pxl_clk_pll_freq_khz = 13500;
1366         /* when 0 use maxInputPxlClkPLLFrequencyInKHz from firmwareInfo*/
1367         calc_pll_cs_init_data_hdmi.max_override_input_pxl_clk_pll_freq_khz = 27000;
1368         /*numberOfFractFBDividerDecimalPoints*/
1369         calc_pll_cs_init_data_hdmi.num_fract_fb_divider_decimal_point =
1370                         FRACT_FB_DIVIDER_DEC_POINTS_MAX_NUM;
1371         /*number of decimal point to round off for fractional feedback divider value*/
1372         calc_pll_cs_init_data_hdmi.num_fract_fb_divider_decimal_point_precision =
1373                         FRACT_FB_DIVIDER_DEC_POINTS_MAX_NUM;
1374         calc_pll_cs_init_data_hdmi.ctx = ctx;
1375 
1376         clk_src->ref_freq_khz = clk_src->bios->fw_info.pll_info.crystal_frequency;
1377 
1378         if (clk_src->base.id == CLOCK_SOURCE_ID_EXTERNAL)
1379                 return true;
1380 
1381         /* PLL only from here on */
1382         ss_info_from_atombios_create(clk_src);
1383 
1384         if (!calc_pll_max_vco_construct(
1385                         &clk_src->calc_pll,
1386                         &calc_pll_cs_init_data)) {
1387                 ASSERT_CRITICAL(false);
1388                 goto unexpected_failure;
1389         }
1390 
1391 
1392         calc_pll_cs_init_data_hdmi.
1393                         min_override_input_pxl_clk_pll_freq_khz = clk_src->ref_freq_khz/2;
1394         calc_pll_cs_init_data_hdmi.
1395                         max_override_input_pxl_clk_pll_freq_khz = clk_src->ref_freq_khz;
1396 
1397 
1398         if (!calc_pll_max_vco_construct(
1399                         &clk_src->calc_pll_hdmi, &calc_pll_cs_init_data_hdmi)) {
1400                 ASSERT_CRITICAL(false);
1401                 goto unexpected_failure;
1402         }
1403 
1404         return true;
1405 
1406 unexpected_failure:
1407         return false;
1408 }
1409 
1410 bool dce112_clk_src_construct(
1411         struct dce110_clk_src *clk_src,
1412         struct dc_context *ctx,
1413         struct dc_bios *bios,
1414         enum clock_source_id id,
1415         const struct dce110_clk_src_regs *regs,
1416         const struct dce110_clk_src_shift *cs_shift,
1417         const struct dce110_clk_src_mask *cs_mask)
1418 {
1419         clk_src->base.ctx = ctx;
1420         clk_src->bios = bios;
1421         clk_src->base.id = id;
1422         clk_src->base.funcs = &dce112_clk_src_funcs;
1423 
1424         clk_src->regs = regs;
1425         clk_src->cs_shift = cs_shift;
1426         clk_src->cs_mask = cs_mask;
1427 
1428         if (!clk_src->bios->fw_info_valid) {
1429                 ASSERT_CRITICAL(false);
1430                 return false;
1431         }
1432 
1433         clk_src->ext_clk_khz = clk_src->bios->fw_info.external_clock_source_frequency_for_dp;
1434 
1435         return true;
1436 }
1437 
1438 #if defined(CONFIG_DRM_AMD_DC_DCN2_0)
1439 bool dcn20_clk_src_construct(
1440         struct dce110_clk_src *clk_src,
1441         struct dc_context *ctx,
1442         struct dc_bios *bios,
1443         enum clock_source_id id,
1444         const struct dce110_clk_src_regs *regs,
1445         const struct dce110_clk_src_shift *cs_shift,
1446         const struct dce110_clk_src_mask *cs_mask)
1447 {
1448         bool ret = dce112_clk_src_construct(clk_src, ctx, bios, id, regs, cs_shift, cs_mask);
1449 
1450         clk_src->base.funcs = &dcn20_clk_src_funcs;
1451 
1452         return ret;
1453 }
1454 #endif
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/gpu/drm/amd/display/dc/dce/dce_clock_source.c

DEFINITIONS
