kernel/drivers/gpu/drm/radeon/rv740_dpm.c

   1 /*
   2  * Copyright 2011 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: Alex Deucher
  23  */
  24
  25 #include "drmP.h"
  26 #include "radeon.h"
  27 #include "rv740d.h"
  28 #include "r600_dpm.h"
  29 #include "rv770_dpm.h"
  30 #include "atom.h"
  31
  32 struct rv7xx_power_info *rv770_get_pi(struct radeon_device *rdev);
  33
  34 u32 rv740_get_decoded_reference_divider(u32 encoded_ref)
  35 {
  36         u32 ref = 0;
  37
  38         switch (encoded_ref) {
  39         case 0:
  40                 ref = 1;
  41                 break;
  42         case 16:
  43                 ref = 2;
  44                 break;
  45         case 17:
  46                 ref = 3;
  47                 break;
  48         case 18:
  49                 ref = 2;
  50                 break;
  51         case 19:
  52                 ref = 3;
  53                 break;
  54         case 20:
  55                 ref = 4;
  56                 break;
  57         case 21:
  58                 ref = 5;
  59                 break;
  60         default:
  61                 DRM_ERROR("Invalid encoded Reference Divider\n");
  62                 ref = 0;
  63                 break;
  64         }
  65
  66         return ref;
  67 }
  68
  69 struct dll_speed_setting {
  70         u16 min;
  71         u16 max;
  72         u32 dll_speed;
  73 };
  74
  75 static struct dll_speed_setting dll_speed_table[16] =
  76 {
  77         { 270, 320, 0x0f },
  78         { 240, 270, 0x0e },
  79         { 200, 240, 0x0d },
  80         { 180, 200, 0x0c },
  81         { 160, 180, 0x0b },
  82         { 140, 160, 0x0a },
  83         { 120, 140, 0x09 },
  84         { 110, 120, 0x08 },
  85         {  95, 110, 0x07 },
  86         {  85,  95, 0x06 },
  87         {  78,  85, 0x05 },
  88         {  70,  78, 0x04 },
  89         {  65,  70, 0x03 },
  90         {  60,  65, 0x02 },
  91         {  42,  60, 0x01 },
  92         {  00,  42, 0x00 }
  93 };
  94
  95 u32 rv740_get_dll_speed(bool is_gddr5, u32 memory_clock)
  96 {
  97         int i;
  98         u32 factor;
  99         u16 data_rate;
 100
 101         if (is_gddr5)
 102                 factor = 4;
 103         else
 104                 factor = 2;
 105
 106         data_rate = (u16)(memory_clock * factor / 1000);
 107
 108         if (data_rate < dll_speed_table[0].max) {
 109                 for (i = 0; i < 16; i++) {
 110                         if (data_rate > dll_speed_table[i].min &&
 111                             data_rate <= dll_speed_table[i].max)
 112                                 return dll_speed_table[i].dll_speed;
 113                 }
 114         }
 115
 116         DRM_DEBUG_KMS("Target MCLK greater than largest MCLK in DLL speed table\n");
 117
 118         return 0x0f;
 119 }
 120
 121 int rv740_populate_sclk_value(struct radeon_device *rdev, u32 engine_clock,
 122                               RV770_SMC_SCLK_VALUE *sclk)
 123 {
 124         struct rv7xx_power_info *pi = rv770_get_pi(rdev);
 125         struct atom_clock_dividers dividers;
 126         u32 spll_func_cntl = pi->clk_regs.rv770.cg_spll_func_cntl;
 127         u32 spll_func_cntl_2 = pi->clk_regs.rv770.cg_spll_func_cntl_2;
 128         u32 spll_func_cntl_3 = pi->clk_regs.rv770.cg_spll_func_cntl_3;
 129         u32 cg_spll_spread_spectrum = pi->clk_regs.rv770.cg_spll_spread_spectrum;
 130         u32 cg_spll_spread_spectrum_2 = pi->clk_regs.rv770.cg_spll_spread_spectrum_2;
 131         u64 tmp;
 132         u32 reference_clock = rdev->clock.spll.reference_freq;
 133         u32 reference_divider;
 134         u32 fbdiv;
 135         int ret;
 136
 137         ret = radeon_atom_get_clock_dividers(rdev, COMPUTE_ENGINE_PLL_PARAM,
 138                                              engine_clock, false, &dividers);
 139         if (ret)
 140                 return ret;
 141
 142         reference_divider = 1 + dividers.ref_div;
 143
 144         tmp = (u64) engine_clock * reference_divider * dividers.post_div * 16384;
 145         do_div(tmp, reference_clock);
 146         fbdiv = (u32) tmp;
 147
 148         spll_func_cntl &= ~(SPLL_PDIV_A_MASK | SPLL_REF_DIV_MASK);
 149         spll_func_cntl |= SPLL_REF_DIV(dividers.ref_div);
 150         spll_func_cntl |= SPLL_PDIV_A(dividers.post_div);
 151
 152         spll_func_cntl_2 &= ~SCLK_MUX_SEL_MASK;
 153         spll_func_cntl_2 |= SCLK_MUX_SEL(2);
 154
 155         spll_func_cntl_3 &= ~SPLL_FB_DIV_MASK;
 156         spll_func_cntl_3 |= SPLL_FB_DIV(fbdiv);
 157         spll_func_cntl_3 |= SPLL_DITHEN;
 158
 159         if (pi->sclk_ss) {
 160                 struct radeon_atom_ss ss;
 161                 u32 vco_freq = engine_clock * dividers.post_div;
 162
 163                 if (radeon_atombios_get_asic_ss_info(rdev, &ss,
 164                                                      ASIC_INTERNAL_ENGINE_SS, vco_freq)) {
 165                         u32 clk_s = reference_clock * 5 / (reference_divider * ss.rate);
 166                         u32 clk_v = 4 * ss.percentage * fbdiv / (clk_s * 10000);
 167
 168                         cg_spll_spread_spectrum &= ~CLK_S_MASK;
 169                         cg_spll_spread_spectrum |= CLK_S(clk_s);
 170                         cg_spll_spread_spectrum |= SSEN;
 171
 172                         cg_spll_spread_spectrum_2 &= ~CLK_V_MASK;
 173                         cg_spll_spread_spectrum_2 |= CLK_V(clk_v);
 174                 }
 175         }
 176
 177         sclk->sclk_value = cpu_to_be32(engine_clock);
 178         sclk->vCG_SPLL_FUNC_CNTL = cpu_to_be32(spll_func_cntl);
 179         sclk->vCG_SPLL_FUNC_CNTL_2 = cpu_to_be32(spll_func_cntl_2);
 180         sclk->vCG_SPLL_FUNC_CNTL_3 = cpu_to_be32(spll_func_cntl_3);
 181         sclk->vCG_SPLL_SPREAD_SPECTRUM = cpu_to_be32(cg_spll_spread_spectrum);
 182         sclk->vCG_SPLL_SPREAD_SPECTRUM_2 = cpu_to_be32(cg_spll_spread_spectrum_2);
 183
 184         return 0;
 185 }
 186
 187 int rv740_populate_mclk_value(struct radeon_device *rdev,
 188                               u32 engine_clock, u32 memory_clock,
 189                               RV7XX_SMC_MCLK_VALUE *mclk)
 190 {
 191         struct rv7xx_power_info *pi = rv770_get_pi(rdev);
 192         u32 mpll_ad_func_cntl = pi->clk_regs.rv770.mpll_ad_func_cntl;
 193         u32 mpll_ad_func_cntl_2 = pi->clk_regs.rv770.mpll_ad_func_cntl_2;
 194         u32 mpll_dq_func_cntl = pi->clk_regs.rv770.mpll_dq_func_cntl;
 195         u32 mpll_dq_func_cntl_2 = pi->clk_regs.rv770.mpll_dq_func_cntl_2;
 196         u32 mclk_pwrmgt_cntl = pi->clk_regs.rv770.mclk_pwrmgt_cntl;
 197         u32 dll_cntl = pi->clk_regs.rv770.dll_cntl;
 198         u32 mpll_ss1 = pi->clk_regs.rv770.mpll_ss1;
 199         u32 mpll_ss2 = pi->clk_regs.rv770.mpll_ss2;
 200         struct atom_clock_dividers dividers;
 201         u32 ibias;
 202         u32 dll_speed;
 203         int ret;
 204
 205         ret = radeon_atom_get_clock_dividers(rdev, COMPUTE_MEMORY_PLL_PARAM,
 206                                              memory_clock, false, &dividers);
 207         if (ret)
 208                 return ret;
 209
 210         ibias = rv770_map_clkf_to_ibias(rdev, dividers.whole_fb_div);
 211
 212         mpll_ad_func_cntl &= ~(CLKR_MASK |
 213                                YCLK_POST_DIV_MASK |
 214                                CLKF_MASK |
 215                                CLKFRAC_MASK |
 216                                IBIAS_MASK);
 217         mpll_ad_func_cntl |= CLKR(dividers.ref_div);
 218         mpll_ad_func_cntl |= YCLK_POST_DIV(dividers.post_div);
 219         mpll_ad_func_cntl |= CLKF(dividers.whole_fb_div);
 220         mpll_ad_func_cntl |= CLKFRAC(dividers.frac_fb_div);
 221         mpll_ad_func_cntl |= IBIAS(ibias);
 222
 223         if (dividers.vco_mode)
 224                 mpll_ad_func_cntl_2 |= VCO_MODE;
 225         else
 226                 mpll_ad_func_cntl_2 &= ~VCO_MODE;
 227
 228         if (pi->mem_gddr5) {
 229                 mpll_dq_func_cntl &= ~(CLKR_MASK |
 230                                        YCLK_POST_DIV_MASK |
 231                                        CLKF_MASK |
 232                                        CLKFRAC_MASK |
 233                                        IBIAS_MASK);
 234                 mpll_dq_func_cntl |= CLKR(dividers.ref_div);
 235                 mpll_dq_func_cntl |= YCLK_POST_DIV(dividers.post_div);
 236                 mpll_dq_func_cntl |= CLKF(dividers.whole_fb_div);
 237                 mpll_dq_func_cntl |= CLKFRAC(dividers.frac_fb_div);
 238                 mpll_dq_func_cntl |= IBIAS(ibias);
 239
 240                 if (dividers.vco_mode)
 241                         mpll_dq_func_cntl_2 |= VCO_MODE;
 242                 else
 243                         mpll_dq_func_cntl_2 &= ~VCO_MODE;
 244         }
 245
 246         if (pi->mclk_ss) {
 247                 struct radeon_atom_ss ss;
 248                 u32 vco_freq = memory_clock * dividers.post_div;
 249
 250                 if (radeon_atombios_get_asic_ss_info(rdev, &ss,
 251                                                      ASIC_INTERNAL_MEMORY_SS, vco_freq)) {
 252                         u32 reference_clock = rdev->clock.mpll.reference_freq;
 253                         u32 decoded_ref = rv740_get_decoded_reference_divider(dividers.ref_div);
 254                         u32 clk_s = reference_clock * 5 / (decoded_ref * ss.rate);
 255                         u32 clk_v = 0x40000 * ss.percentage *
 256                                 (dividers.whole_fb_div + (dividers.frac_fb_div / 8)) / (clk_s * 10000);
 257
 258                         mpll_ss1 &= ~CLKV_MASK;
 259                         mpll_ss1 |= CLKV(clk_v);
 260
 261                         mpll_ss2 &= ~CLKS_MASK;
 262                         mpll_ss2 |= CLKS(clk_s);
 263                 }
 264         }
 265
 266         dll_speed = rv740_get_dll_speed(pi->mem_gddr5,
 267                                         memory_clock);
 268
 269         mclk_pwrmgt_cntl &= ~DLL_SPEED_MASK;
 270         mclk_pwrmgt_cntl |= DLL_SPEED(dll_speed);
 271
 272         mclk->mclk770.mclk_value = cpu_to_be32(memory_clock);
 273         mclk->mclk770.vMPLL_AD_FUNC_CNTL = cpu_to_be32(mpll_ad_func_cntl);
 274         mclk->mclk770.vMPLL_AD_FUNC_CNTL_2 = cpu_to_be32(mpll_ad_func_cntl_2);
 275         mclk->mclk770.vMPLL_DQ_FUNC_CNTL = cpu_to_be32(mpll_dq_func_cntl);
 276         mclk->mclk770.vMPLL_DQ_FUNC_CNTL_2 = cpu_to_be32(mpll_dq_func_cntl_2);
 277         mclk->mclk770.vMCLK_PWRMGT_CNTL = cpu_to_be32(mclk_pwrmgt_cntl);
 278         mclk->mclk770.vDLL_CNTL = cpu_to_be32(dll_cntl);
 279         mclk->mclk770.vMPLL_SS = cpu_to_be32(mpll_ss1);
 280         mclk->mclk770.vMPLL_SS2 = cpu_to_be32(mpll_ss2);
 281
 282         return 0;
 283 }
 284
 285 void rv740_read_clock_registers(struct radeon_device *rdev)
 286 {
 287         struct rv7xx_power_info *pi = rv770_get_pi(rdev);
 288
 289         pi->clk_regs.rv770.cg_spll_func_cntl =
 290                 RREG32(CG_SPLL_FUNC_CNTL);
 291         pi->clk_regs.rv770.cg_spll_func_cntl_2 =
 292                 RREG32(CG_SPLL_FUNC_CNTL_2);
 293         pi->clk_regs.rv770.cg_spll_func_cntl_3 =
 294                 RREG32(CG_SPLL_FUNC_CNTL_3);
 295         pi->clk_regs.rv770.cg_spll_spread_spectrum =
 296                 RREG32(CG_SPLL_SPREAD_SPECTRUM);
 297         pi->clk_regs.rv770.cg_spll_spread_spectrum_2 =
 298                 RREG32(CG_SPLL_SPREAD_SPECTRUM_2);
 299
 300         pi->clk_regs.rv770.mpll_ad_func_cntl =
 301                 RREG32(MPLL_AD_FUNC_CNTL);
 302         pi->clk_regs.rv770.mpll_ad_func_cntl_2 =
 303                 RREG32(MPLL_AD_FUNC_CNTL_2);
 304         pi->clk_regs.rv770.mpll_dq_func_cntl =
 305                 RREG32(MPLL_DQ_FUNC_CNTL);
 306         pi->clk_regs.rv770.mpll_dq_func_cntl_2 =
 307                 RREG32(MPLL_DQ_FUNC_CNTL_2);
 308         pi->clk_regs.rv770.mclk_pwrmgt_cntl =
 309                 RREG32(MCLK_PWRMGT_CNTL);
 310         pi->clk_regs.rv770.dll_cntl = RREG32(DLL_CNTL);
 311         pi->clk_regs.rv770.mpll_ss1 = RREG32(MPLL_SS1);
 312         pi->clk_regs.rv770.mpll_ss2 = RREG32(MPLL_SS2);
 313 }
 314
 315 int rv740_populate_smc_acpi_state(struct radeon_device *rdev,
 316                                   RV770_SMC_STATETABLE *table)
 317 {
 318         struct rv7xx_power_info *pi = rv770_get_pi(rdev);
 319         u32 mpll_ad_func_cntl = pi->clk_regs.rv770.mpll_ad_func_cntl;
 320         u32 mpll_ad_func_cntl_2 = pi->clk_regs.rv770.mpll_ad_func_cntl_2;
 321         u32 mpll_dq_func_cntl = pi->clk_regs.rv770.mpll_dq_func_cntl;
 322         u32 mpll_dq_func_cntl_2 = pi->clk_regs.rv770.mpll_dq_func_cntl_2;
 323         u32 spll_func_cntl = pi->clk_regs.rv770.cg_spll_func_cntl;
 324         u32 spll_func_cntl_2 = pi->clk_regs.rv770.cg_spll_func_cntl_2;
 325         u32 spll_func_cntl_3 = pi->clk_regs.rv770.cg_spll_func_cntl_3;
 326         u32 mclk_pwrmgt_cntl = pi->clk_regs.rv770.mclk_pwrmgt_cntl;
 327         u32 dll_cntl = pi->clk_regs.rv770.dll_cntl;
 328
 329         table->ACPIState = table->initialState;
 330
 331         table->ACPIState.flags &= ~PPSMC_SWSTATE_FLAG_DC;
 332
 333         if (pi->acpi_vddc) {
 334                 rv770_populate_vddc_value(rdev, pi->acpi_vddc,
 335                                           &table->ACPIState.levels[0].vddc);
 336                 table->ACPIState.levels[0].gen2PCIE =
 337                         pi->pcie_gen2 ?
 338                         pi->acpi_pcie_gen2 : 0;
 339                 table->ACPIState.levels[0].gen2XSP =
 340                         pi->acpi_pcie_gen2;
 341         } else {
 342                 rv770_populate_vddc_value(rdev, pi->min_vddc_in_table,
 343                                           &table->ACPIState.levels[0].vddc);
 344                 table->ACPIState.levels[0].gen2PCIE = 0;
 345         }
 346
 347         mpll_ad_func_cntl_2 |= BIAS_GEN_PDNB | RESET_EN;
 348
 349         mpll_dq_func_cntl_2 |= BYPASS | BIAS_GEN_PDNB | RESET_EN;
 350
 351         mclk_pwrmgt_cntl |= (MRDCKA0_RESET |
 352                              MRDCKA1_RESET |
 353                              MRDCKB0_RESET |
 354                              MRDCKB1_RESET |
 355                              MRDCKC0_RESET |
 356                              MRDCKC1_RESET |
 357                              MRDCKD0_RESET |
 358                              MRDCKD1_RESET);
 359
 360         dll_cntl |= (MRDCKA0_BYPASS |
 361                      MRDCKA1_BYPASS |
 362                      MRDCKB0_BYPASS |
 363                      MRDCKB1_BYPASS |
 364                      MRDCKC0_BYPASS |
 365                      MRDCKC1_BYPASS |
 366                      MRDCKD0_BYPASS |
 367                      MRDCKD1_BYPASS);
 368
 369         spll_func_cntl |= SPLL_RESET | SPLL_SLEEP | SPLL_BYPASS_EN;
 370
 371         spll_func_cntl_2 &= ~SCLK_MUX_SEL_MASK;
 372         spll_func_cntl_2 |= SCLK_MUX_SEL(4);
 373
 374         table->ACPIState.levels[0].mclk.mclk770.vMPLL_AD_FUNC_CNTL = cpu_to_be32(mpll_ad_func_cntl);
 375         table->ACPIState.levels[0].mclk.mclk770.vMPLL_AD_FUNC_CNTL_2 = cpu_to_be32(mpll_ad_func_cntl_2);
 376         table->ACPIState.levels[0].mclk.mclk770.vMPLL_DQ_FUNC_CNTL = cpu_to_be32(mpll_dq_func_cntl);
 377         table->ACPIState.levels[0].mclk.mclk770.vMPLL_DQ_FUNC_CNTL_2 = cpu_to_be32(mpll_dq_func_cntl_2);
 378         table->ACPIState.levels[0].mclk.mclk770.vMCLK_PWRMGT_CNTL = cpu_to_be32(mclk_pwrmgt_cntl);
 379         table->ACPIState.levels[0].mclk.mclk770.vDLL_CNTL = cpu_to_be32(dll_cntl);
 380
 381         table->ACPIState.levels[0].mclk.mclk770.mclk_value = 0;
 382
 383         table->ACPIState.levels[0].sclk.vCG_SPLL_FUNC_CNTL = cpu_to_be32(spll_func_cntl);
 384         table->ACPIState.levels[0].sclk.vCG_SPLL_FUNC_CNTL_2 = cpu_to_be32(spll_func_cntl_2);
 385         table->ACPIState.levels[0].sclk.vCG_SPLL_FUNC_CNTL_3 = cpu_to_be32(spll_func_cntl_3);
 386
 387         table->ACPIState.levels[0].sclk.sclk_value = 0;
 388
 389         table->ACPIState.levels[1] = table->ACPIState.levels[0];
 390         table->ACPIState.levels[2] = table->ACPIState.levels[0];
 391
 392         rv770_populate_mvdd_value(rdev, 0, &table->ACPIState.levels[0].mvdd);
 393
 394         return 0;
 395 }
 396
 397 void rv740_enable_mclk_spread_spectrum(struct radeon_device *rdev,
 398                                        bool enable)
 399 {
 400         if (enable)
 401                 WREG32_P(MPLL_CNTL_MODE, SS_SSEN, ~SS_SSEN);
 402         else
 403                 WREG32_P(MPLL_CNTL_MODE, 0, ~SS_SSEN);
 404 }
 405
 406 u8 rv740_get_mclk_frequency_ratio(u32 memory_clock)
 407 {
 408         u8 mc_para_index;
 409
 410         if ((memory_clock < 10000) || (memory_clock > 47500))
 411                 mc_para_index = 0x00;
 412         else
 413                 mc_para_index = (u8)((memory_clock - 10000) / 2500);
 414
 415         return mc_para_index;
 416 }