drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hubbub.c

   1 /*
   2  * Copyright 2016 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
  27 #include "dcn20_hubbub.h"
  28 #include "reg_helper.h"
  29 #include "clk_mgr.h"
  30
  31 #define REG(reg)\
  32         hubbub1->regs->reg
  33
  34 #define CTX \
  35         hubbub1->base.ctx
  36
  37 #undef FN
  38 #define FN(reg_name, field_name) \
  39         hubbub1->shifts->field_name, hubbub1->masks->field_name
  40
  41 #define REG(reg)\
  42         hubbub1->regs->reg
  43
  44 #define CTX \
  45         hubbub1->base.ctx
  46
  47 #undef FN
  48 #define FN(reg_name, field_name) \
  49         hubbub1->shifts->field_name, hubbub1->masks->field_name
  50
  51 #ifdef NUM_VMID
  52 #undef NUM_VMID
  53 #endif
  54 #define NUM_VMID 16
  55
  56 bool hubbub2_dcc_support_swizzle(
  57                 enum swizzle_mode_values swizzle,
  58                 unsigned int bytes_per_element,
  59                 enum segment_order *segment_order_horz,
  60                 enum segment_order *segment_order_vert)
  61 {
  62         bool standard_swizzle = false;
  63         bool display_swizzle = false;
  64         bool render_swizzle = false;
  65
  66         switch (swizzle) {
  67         case DC_SW_4KB_S:
  68         case DC_SW_64KB_S:
  69         case DC_SW_VAR_S:
  70         case DC_SW_4KB_S_X:
  71         case DC_SW_64KB_S_X:
  72         case DC_SW_VAR_S_X:
  73                 standard_swizzle = true;
  74                 break;
  75         case DC_SW_64KB_R_X:
  76                 render_swizzle = true;
  77                 break;
  78         case DC_SW_4KB_D:
  79         case DC_SW_64KB_D:
  80         case DC_SW_VAR_D:
  81         case DC_SW_4KB_D_X:
  82         case DC_SW_64KB_D_X:
  83         case DC_SW_VAR_D_X:
  84                 display_swizzle = true;
  85                 break;
  86         default:
  87                 break;
  88         }
  89
  90         if (standard_swizzle) {
  91                 if (bytes_per_element == 1) {
  92                         *segment_order_horz = segment_order__contiguous;
  93                         *segment_order_vert = segment_order__na;
  94                         return true;
  95                 }
  96                 if (bytes_per_element == 2) {
  97                         *segment_order_horz = segment_order__non_contiguous;
  98                         *segment_order_vert = segment_order__contiguous;
  99                         return true;
 100                 }
 101                 if (bytes_per_element == 4) {
 102                         *segment_order_horz = segment_order__non_contiguous;
 103                         *segment_order_vert = segment_order__contiguous;
 104                         return true;
 105                 }
 106                 if (bytes_per_element == 8) {
 107                         *segment_order_horz = segment_order__na;
 108                         *segment_order_vert = segment_order__contiguous;
 109                         return true;
 110                 }
 111         }
 112         if (render_swizzle) {
 113                 if (bytes_per_element == 2) {
 114                         *segment_order_horz = segment_order__contiguous;
 115                         *segment_order_vert = segment_order__contiguous;
 116                         return true;
 117                 }
 118                 if (bytes_per_element == 4) {
 119                         *segment_order_horz = segment_order__non_contiguous;
 120                         *segment_order_vert = segment_order__contiguous;
 121                         return true;
 122                 }
 123                 if (bytes_per_element == 8) {
 124                         *segment_order_horz = segment_order__contiguous;
 125                         *segment_order_vert = segment_order__non_contiguous;
 126                         return true;
 127                 }
 128         }
 129         if (display_swizzle && bytes_per_element == 8) {
 130                 *segment_order_horz = segment_order__contiguous;
 131                 *segment_order_vert = segment_order__non_contiguous;
 132                 return true;
 133         }
 134
 135         return false;
 136 }
 137
 138 bool hubbub2_dcc_support_pixel_format(
 139                 enum surface_pixel_format format,
 140                 unsigned int *bytes_per_element)
 141 {
 142         /* DML: get_bytes_per_element */
 143         switch (format) {
 144         case SURFACE_PIXEL_FORMAT_GRPH_ARGB1555:
 145         case SURFACE_PIXEL_FORMAT_GRPH_RGB565:
 146                 *bytes_per_element = 2;
 147                 return true;
 148         case SURFACE_PIXEL_FORMAT_GRPH_ARGB8888:
 149         case SURFACE_PIXEL_FORMAT_GRPH_ABGR8888:
 150         case SURFACE_PIXEL_FORMAT_GRPH_ARGB2101010:
 151         case SURFACE_PIXEL_FORMAT_GRPH_ABGR2101010:
 152         case SURFACE_PIXEL_FORMAT_GRPH_RGB111110_FIX:
 153         case SURFACE_PIXEL_FORMAT_GRPH_BGR101111_FIX:
 154         case SURFACE_PIXEL_FORMAT_GRPH_RGB111110_FLOAT:
 155         case SURFACE_PIXEL_FORMAT_GRPH_BGR101111_FLOAT:
 156                 *bytes_per_element = 4;
 157                 return true;
 158         case SURFACE_PIXEL_FORMAT_GRPH_ARGB16161616:
 159         case SURFACE_PIXEL_FORMAT_GRPH_ARGB16161616F:
 160         case SURFACE_PIXEL_FORMAT_GRPH_ABGR16161616F:
 161                 *bytes_per_element = 8;
 162                 return true;
 163         default:
 164                 return false;
 165         }
 166 }
 167
 168 static void hubbub2_get_blk256_size(unsigned int *blk256_width, unsigned int *blk256_height,
 169                 unsigned int bytes_per_element)
 170 {
 171         /* copied from DML.  might want to refactor DML to leverage from DML */
 172         /* DML : get_blk256_size */
 173         if (bytes_per_element == 1) {
 174                 *blk256_width = 16;
 175                 *blk256_height = 16;
 176         } else if (bytes_per_element == 2) {
 177                 *blk256_width = 16;
 178                 *blk256_height = 8;
 179         } else if (bytes_per_element == 4) {
 180                 *blk256_width = 8;
 181                 *blk256_height = 8;
 182         } else if (bytes_per_element == 8) {
 183                 *blk256_width = 8;
 184                 *blk256_height = 4;
 185         }
 186 }
 187
 188 static void hubbub2_det_request_size(
 189                 unsigned int height,
 190                 unsigned int width,
 191                 unsigned int bpe,
 192                 bool *req128_horz_wc,
 193                 bool *req128_vert_wc)
 194 {
 195         unsigned int detile_buf_size = 164 * 1024;  /* 164KB for DCN1.0 */
 196
 197         unsigned int blk256_height = 0;
 198         unsigned int blk256_width = 0;
 199         unsigned int swath_bytes_horz_wc, swath_bytes_vert_wc;
 200
 201         hubbub2_get_blk256_size(&blk256_width, &blk256_height, bpe);
 202
 203         swath_bytes_horz_wc = width * blk256_height * bpe;
 204         swath_bytes_vert_wc = height * blk256_width * bpe;
 205
 206         *req128_horz_wc = (2 * swath_bytes_horz_wc <= detile_buf_size) ?
 207                         false : /* full 256B request */
 208                         true; /* half 128b request */
 209
 210         *req128_vert_wc = (2 * swath_bytes_vert_wc <= detile_buf_size) ?
 211                         false : /* full 256B request */
 212                         true; /* half 128b request */
 213 }
 214
 215 bool hubbub2_get_dcc_compression_cap(struct hubbub *hubbub,
 216                 const struct dc_dcc_surface_param *input,
 217                 struct dc_surface_dcc_cap *output)
 218 {
 219         struct dc *dc = hubbub->ctx->dc;
 220         /* implement section 1.6.2.1 of DCN1_Programming_Guide.docx */
 221         enum dcc_control dcc_control;
 222         unsigned int bpe;
 223         enum segment_order segment_order_horz, segment_order_vert;
 224         bool req128_horz_wc, req128_vert_wc;
 225
 226         memset(output, 0, sizeof(*output));
 227
 228         if (dc->debug.disable_dcc == DCC_DISABLE)
 229                 return false;
 230
 231         if (!hubbub->funcs->dcc_support_pixel_format(input->format,
 232                         &bpe))
 233                 return false;
 234
 235         if (!hubbub->funcs->dcc_support_swizzle(input->swizzle_mode, bpe,
 236                         &segment_order_horz, &segment_order_vert))
 237                 return false;
 238
 239         hubbub2_det_request_size(input->surface_size.height,  input->surface_size.width,
 240                         bpe, &req128_horz_wc, &req128_vert_wc);
 241
 242         if (!req128_horz_wc && !req128_vert_wc) {
 243                 dcc_control = dcc_control__256_256_xxx;
 244         } else if (input->scan == SCAN_DIRECTION_HORIZONTAL) {
 245                 if (!req128_horz_wc)
 246                         dcc_control = dcc_control__256_256_xxx;
 247                 else if (segment_order_horz == segment_order__contiguous)
 248                         dcc_control = dcc_control__128_128_xxx;
 249                 else
 250                         dcc_control = dcc_control__256_64_64;
 251         } else if (input->scan == SCAN_DIRECTION_VERTICAL) {
 252                 if (!req128_vert_wc)
 253                         dcc_control = dcc_control__256_256_xxx;
 254                 else if (segment_order_vert == segment_order__contiguous)
 255                         dcc_control = dcc_control__128_128_xxx;
 256                 else
 257                         dcc_control = dcc_control__256_64_64;
 258         } else {
 259                 if ((req128_horz_wc &&
 260                         segment_order_horz == segment_order__non_contiguous) ||
 261                         (req128_vert_wc &&
 262                         segment_order_vert == segment_order__non_contiguous))
 263                         /* access_dir not known, must use most constraining */
 264                         dcc_control = dcc_control__256_64_64;
 265                 else
 266                         /* reg128 is true for either horz and vert
 267                          * but segment_order is contiguous
 268                          */
 269                         dcc_control = dcc_control__128_128_xxx;
 270         }
 271
 272         /* Exception for 64KB_R_X */
 273         if ((bpe == 2) && (input->swizzle_mode == DC_SW_64KB_R_X))
 274                 dcc_control = dcc_control__128_128_xxx;
 275
 276         if (dc->debug.disable_dcc == DCC_HALF_REQ_DISALBE &&
 277                 dcc_control != dcc_control__256_256_xxx)
 278                 return false;
 279
 280         switch (dcc_control) {
 281         case dcc_control__256_256_xxx:
 282                 output->grph.rgb.max_uncompressed_blk_size = 256;
 283                 output->grph.rgb.max_compressed_blk_size = 256;
 284                 output->grph.rgb.independent_64b_blks = false;
 285                 break;
 286         case dcc_control__128_128_xxx:
 287                 output->grph.rgb.max_uncompressed_blk_size = 128;
 288                 output->grph.rgb.max_compressed_blk_size = 128;
 289                 output->grph.rgb.independent_64b_blks = false;
 290                 break;
 291         case dcc_control__256_64_64:
 292                 output->grph.rgb.max_uncompressed_blk_size = 256;
 293                 output->grph.rgb.max_compressed_blk_size = 64;
 294                 output->grph.rgb.independent_64b_blks = true;
 295                 break;
 296         }
 297         output->capable = true;
 298         output->const_color_support = true;
 299
 300         return true;
 301 }
 302
 303 static enum dcn_hubbub_page_table_depth page_table_depth_to_hw(unsigned int page_table_depth)
 304 {
 305         enum dcn_hubbub_page_table_depth depth = 0;
 306
 307         switch (page_table_depth) {
 308         case 1:
 309                 depth = DCN_PAGE_TABLE_DEPTH_1_LEVEL;
 310                 break;
 311         case 2:
 312                 depth = DCN_PAGE_TABLE_DEPTH_2_LEVEL;
 313                 break;
 314         case 3:
 315                 depth = DCN_PAGE_TABLE_DEPTH_3_LEVEL;
 316                 break;
 317         case 4:
 318                 depth = DCN_PAGE_TABLE_DEPTH_4_LEVEL;
 319                 break;
 320         default:
 321                 ASSERT(false);
 322                 break;
 323         }
 324
 325         return depth;
 326 }
 327
 328 static enum dcn_hubbub_page_table_block_size page_table_block_size_to_hw(unsigned int page_table_block_size)
 329 {
 330         enum dcn_hubbub_page_table_block_size block_size = 0;
 331
 332         switch (page_table_block_size) {
 333         case 4096:
 334                 block_size = DCN_PAGE_TABLE_BLOCK_SIZE_4KB;
 335                 break;
 336         case 65536:
 337                 block_size = DCN_PAGE_TABLE_BLOCK_SIZE_64KB;
 338                 break;
 339         default:
 340                 ASSERT(false);
 341                 block_size = page_table_block_size;
 342                 break;
 343         }
 344
 345         return block_size;
 346 }
 347
 348 void hubbub2_init_vm_ctx(struct hubbub *hubbub,
 349                 struct dcn_hubbub_virt_addr_config *va_config,
 350                 int vmid)
 351 {
 352         struct dcn20_hubbub *hubbub1 = TO_DCN20_HUBBUB(hubbub);
 353         struct dcn_vmid_page_table_config virt_config;
 354
 355         virt_config.page_table_start_addr = va_config->page_table_start_addr >> 12;
 356         virt_config.page_table_end_addr = va_config->page_table_end_addr >> 12;
 357         virt_config.depth = page_table_depth_to_hw(va_config->page_table_depth);
 358         virt_config.block_size = page_table_block_size_to_hw(va_config->page_table_block_size);
 359         virt_config.page_table_base_addr = va_config->page_table_base_addr;
 360
 361         dcn20_vmid_setup(&hubbub1->vmid[vmid], &virt_config);
 362 }
 363
 364 int hubbub2_init_dchub_sys_ctx(struct hubbub *hubbub,
 365                 struct dcn_hubbub_phys_addr_config *pa_config)
 366 {
 367         struct dcn20_hubbub *hubbub1 = TO_DCN20_HUBBUB(hubbub);
 368         struct dcn_vmid_page_table_config phys_config;
 369
 370         REG_SET(DCN_VM_FB_LOCATION_BASE, 0,
 371                         FB_BASE, pa_config->system_aperture.fb_base >> 24);
 372         REG_SET(DCN_VM_FB_LOCATION_TOP, 0,
 373                         FB_TOP, pa_config->system_aperture.fb_top >> 24);
 374         REG_SET(DCN_VM_FB_OFFSET, 0,
 375                         FB_OFFSET, pa_config->system_aperture.fb_offset >> 24);
 376         REG_SET(DCN_VM_AGP_BOT, 0,
 377                         AGP_BOT, pa_config->system_aperture.agp_bot >> 24);
 378         REG_SET(DCN_VM_AGP_TOP, 0,
 379                         AGP_TOP, pa_config->system_aperture.agp_top >> 24);
 380         REG_SET(DCN_VM_AGP_BASE, 0,
 381                         AGP_BASE, pa_config->system_aperture.agp_base >> 24);
 382
 383         if (pa_config->gart_config.page_table_start_addr != pa_config->gart_config.page_table_end_addr) {
 384                 phys_config.page_table_start_addr = pa_config->gart_config.page_table_start_addr >> 12;
 385                 phys_config.page_table_end_addr = pa_config->gart_config.page_table_end_addr >> 12;
 386                 phys_config.page_table_base_addr = pa_config->gart_config.page_table_base_addr;
 387                 phys_config.depth = 0;
 388                 phys_config.block_size = 0;
 389                 // Init VMID 0 based on PA config
 390                 dcn20_vmid_setup(&hubbub1->vmid[0], &phys_config);
 391         }
 392
 393         return NUM_VMID;
 394 }
 395
 396 void hubbub2_update_dchub(struct hubbub *hubbub,
 397                 struct dchub_init_data *dh_data)
 398 {
 399         struct dcn20_hubbub *hubbub1 = TO_DCN20_HUBBUB(hubbub);
 400
 401         if (REG(DCHUBBUB_SDPIF_FB_TOP) == 0) {
 402                 ASSERT(false);
 403                 /*should not come here*/
 404                 return;
 405         }
 406         /* TODO: port code from dal2 */
 407         switch (dh_data->fb_mode) {
 408         case FRAME_BUFFER_MODE_ZFB_ONLY:
 409                 /*For ZFB case need to put DCHUB FB BASE and TOP upside down to indicate ZFB mode*/
 410                 REG_UPDATE(DCHUBBUB_SDPIF_FB_TOP,
 411                                 SDPIF_FB_TOP, 0);
 412
 413                 REG_UPDATE(DCHUBBUB_SDPIF_FB_BASE,
 414                                 SDPIF_FB_BASE, 0x0FFFF);
 415
 416                 REG_UPDATE(DCHUBBUB_SDPIF_AGP_BASE,
 417                                 SDPIF_AGP_BASE, dh_data->zfb_phys_addr_base >> 22);
 418
 419                 REG_UPDATE(DCHUBBUB_SDPIF_AGP_BOT,
 420                                 SDPIF_AGP_BOT, dh_data->zfb_mc_base_addr >> 22);
 421
 422                 REG_UPDATE(DCHUBBUB_SDPIF_AGP_TOP,
 423                                 SDPIF_AGP_TOP, (dh_data->zfb_mc_base_addr +
 424                                                 dh_data->zfb_size_in_byte - 1) >> 22);
 425                 break;
 426         case FRAME_BUFFER_MODE_MIXED_ZFB_AND_LOCAL:
 427                 /*Should not touch FB LOCATION (done by VBIOS on AsicInit table)*/
 428
 429                 REG_UPDATE(DCHUBBUB_SDPIF_AGP_BASE,
 430                                 SDPIF_AGP_BASE, dh_data->zfb_phys_addr_base >> 22);
 431
 432                 REG_UPDATE(DCHUBBUB_SDPIF_AGP_BOT,
 433                                 SDPIF_AGP_BOT, dh_data->zfb_mc_base_addr >> 22);
 434
 435                 REG_UPDATE(DCHUBBUB_SDPIF_AGP_TOP,
 436                                 SDPIF_AGP_TOP, (dh_data->zfb_mc_base_addr +
 437                                                 dh_data->zfb_size_in_byte - 1) >> 22);
 438                 break;
 439         case FRAME_BUFFER_MODE_LOCAL_ONLY:
 440                 /*Should not touch FB LOCATION (done by VBIOS on AsicInit table)*/
 441                 REG_UPDATE(DCHUBBUB_SDPIF_AGP_BASE,
 442                                 SDPIF_AGP_BASE, 0);
 443
 444                 REG_UPDATE(DCHUBBUB_SDPIF_AGP_BOT,
 445                                 SDPIF_AGP_BOT, 0X03FFFF);
 446
 447                 REG_UPDATE(DCHUBBUB_SDPIF_AGP_TOP,
 448                                 SDPIF_AGP_TOP, 0);
 449                 break;
 450         default:
 451                 break;
 452         }
 453
 454         dh_data->dchub_initialzied = true;
 455         dh_data->dchub_info_valid = false;
 456 }
 457
 458 void hubbub2_wm_read_state(struct hubbub *hubbub,
 459                 struct dcn_hubbub_wm *wm)
 460 {
 461         struct dcn20_hubbub *hubbub1 = TO_DCN20_HUBBUB(hubbub);
 462
 463         struct dcn_hubbub_wm_set *s;
 464
 465         memset(wm, 0, sizeof(struct dcn_hubbub_wm));
 466
 467         s = &wm->sets[0];
 468         s->wm_set = 0;
 469         s->data_urgent = REG_READ(DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_A);
 470         if (REG(DCHUBBUB_ARB_PTE_META_URGENCY_WATERMARK_A))
 471                 s->pte_meta_urgent = REG_READ(DCHUBBUB_ARB_PTE_META_URGENCY_WATERMARK_A);
 472         if (REG(DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_A)) {
 473                 s->sr_enter = REG_READ(DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_A);
 474                 s->sr_exit = REG_READ(DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_A);
 475         }
 476         s->dram_clk_chanage = REG_READ(DCHUBBUB_ARB_ALLOW_DRAM_CLK_CHANGE_WATERMARK_A);
 477
 478         s = &wm->sets[1];
 479         s->wm_set = 1;
 480         s->data_urgent = REG_READ(DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_B);
 481         if (REG(DCHUBBUB_ARB_PTE_META_URGENCY_WATERMARK_B))
 482                 s->pte_meta_urgent = REG_READ(DCHUBBUB_ARB_PTE_META_URGENCY_WATERMARK_B);
 483         if (REG(DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_B)) {
 484                 s->sr_enter = REG_READ(DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_B);
 485                 s->sr_exit = REG_READ(DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_B);
 486         }
 487         s->dram_clk_chanage = REG_READ(DCHUBBUB_ARB_ALLOW_DRAM_CLK_CHANGE_WATERMARK_B);
 488
 489         s = &wm->sets[2];
 490         s->wm_set = 2;
 491         s->data_urgent = REG_READ(DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_C);
 492         if (REG(DCHUBBUB_ARB_PTE_META_URGENCY_WATERMARK_C))
 493                 s->pte_meta_urgent = REG_READ(DCHUBBUB_ARB_PTE_META_URGENCY_WATERMARK_C);
 494         if (REG(DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_C)) {
 495                 s->sr_enter = REG_READ(DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_C);
 496                 s->sr_exit = REG_READ(DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_C);
 497         }
 498         s->dram_clk_chanage = REG_READ(DCHUBBUB_ARB_ALLOW_DRAM_CLK_CHANGE_WATERMARK_C);
 499
 500         s = &wm->sets[3];
 501         s->wm_set = 3;
 502         s->data_urgent = REG_READ(DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_D);
 503         if (REG(DCHUBBUB_ARB_PTE_META_URGENCY_WATERMARK_D))
 504                 s->pte_meta_urgent = REG_READ(DCHUBBUB_ARB_PTE_META_URGENCY_WATERMARK_D);
 505         if (REG(DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_D)) {
 506                 s->sr_enter = REG_READ(DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_D);
 507                 s->sr_exit = REG_READ(DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_D);
 508         }
 509         s->dram_clk_chanage = REG_READ(DCHUBBUB_ARB_ALLOW_DRAM_CLK_CHANGE_WATERMARK_D);
 510 }
 511
 512 void hubbub2_get_dchub_ref_freq(struct hubbub *hubbub,
 513                 unsigned int dccg_ref_freq_inKhz,
 514                 unsigned int *dchub_ref_freq_inKhz)
 515 {
 516         struct dcn20_hubbub *hubbub1 = TO_DCN20_HUBBUB(hubbub);
 517         uint32_t ref_div = 0;
 518         uint32_t ref_en = 0;
 519
 520         REG_GET_2(DCHUBBUB_GLOBAL_TIMER_CNTL, DCHUBBUB_GLOBAL_TIMER_REFDIV, &ref_div,
 521                         DCHUBBUB_GLOBAL_TIMER_ENABLE, &ref_en);
 522
 523         if (ref_en) {
 524                 if (ref_div == 2)
 525                         *dchub_ref_freq_inKhz = dccg_ref_freq_inKhz / 2;
 526                 else
 527                         *dchub_ref_freq_inKhz = dccg_ref_freq_inKhz;
 528
 529                 // DC hub reference frequency must be around 50Mhz, otherwise there may be
 530                 // overflow/underflow issues when doing HUBBUB programming
 531                 if (*dchub_ref_freq_inKhz < 40000 || *dchub_ref_freq_inKhz > 60000)
 532                         ASSERT_CRITICAL(false);
 533
 534                 return;
 535         } else {
 536                 *dchub_ref_freq_inKhz = dccg_ref_freq_inKhz;
 537
 538                 // HUBBUB global timer must be enabled.
 539                 ASSERT_CRITICAL(false);
 540                 return;
 541         }
 542 }
 543
 544 static void hubbub2_program_watermarks(
 545                 struct hubbub *hubbub,
 546                 struct dcn_watermark_set *watermarks,
 547                 unsigned int refclk_mhz,
 548                 bool safe_to_lower)
 549 {
 550         struct dcn20_hubbub *hubbub1 = TO_DCN20_HUBBUB(hubbub);
 551         /*
 552          * Need to clamp to max of the register values (i.e. no wrap)
 553          * for dcn1, all wm registers are 21-bit wide
 554          */
 555         hubbub1_program_urgent_watermarks(hubbub, watermarks, refclk_mhz, safe_to_lower);
 556         hubbub1_program_stutter_watermarks(hubbub, watermarks, refclk_mhz, safe_to_lower);
 557
 558         /*
 559          * There's a special case when going from p-state support to p-state unsupported
 560          * here we are going to LOWER watermarks to go to dummy p-state only, but this has
 561          * to be done prepare_bandwidth, not optimize
 562          */
 563         if (hubbub1->base.ctx->dc->clk_mgr->clks.prev_p_state_change_support == true &&
 564                 hubbub1->base.ctx->dc->clk_mgr->clks.p_state_change_support == false)
 565                 safe_to_lower = true;
 566
 567         hubbub1_program_pstate_watermarks(hubbub, watermarks, refclk_mhz, safe_to_lower);
 568
 569         REG_SET(DCHUBBUB_ARB_SAT_LEVEL, 0,
 570                         DCHUBBUB_ARB_SAT_LEVEL, 60 * refclk_mhz);
 571         REG_UPDATE(DCHUBBUB_ARB_DF_REQ_OUTSTAND, DCHUBBUB_ARB_MIN_REQ_OUTSTAND, 180);
 572
 573         hubbub1_allow_self_refresh_control(hubbub, !hubbub->ctx->dc->debug.disable_stutter);
 574 }
 575
 576 static const struct hubbub_funcs hubbub2_funcs = {
 577         .update_dchub = hubbub2_update_dchub,
 578         .init_dchub_sys_ctx = hubbub2_init_dchub_sys_ctx,
 579         .init_vm_ctx = hubbub2_init_vm_ctx,
 580         .dcc_support_swizzle = hubbub2_dcc_support_swizzle,
 581         .dcc_support_pixel_format = hubbub2_dcc_support_pixel_format,
 582         .get_dcc_compression_cap = hubbub2_get_dcc_compression_cap,
 583         .wm_read_state = hubbub2_wm_read_state,
 584         .get_dchub_ref_freq = hubbub2_get_dchub_ref_freq,
 585         .program_watermarks = hubbub2_program_watermarks,
 586 };
 587
 588 void hubbub2_construct(struct dcn20_hubbub *hubbub,
 589         struct dc_context *ctx,
 590         const struct dcn_hubbub_registers *hubbub_regs,
 591         const struct dcn_hubbub_shift *hubbub_shift,
 592         const struct dcn_hubbub_mask *hubbub_mask)
 593 {
 594         hubbub->base.ctx = ctx;
 595
 596         hubbub->base.funcs = &hubbub2_funcs;
 597
 598         hubbub->regs = hubbub_regs;
 599         hubbub->shifts = hubbub_shift;
 600         hubbub->masks = hubbub_mask;
 601
 602         hubbub->debug_test_index_pstate = 0xB;
 603 }