drivers/gpu/drm/nouveau/nva3_pm.c

   1 /*
   2  * Copyright 2010 Red Hat 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: Ben Skeggs
  23  */
  24
  25 #include "drmP.h"
  26 #include "nouveau_drm.h"
  27 #include "nouveau_bios.h"
  28 #include "nouveau_pm.h"
  29
  30 #include <subdev/bios/pll.h>
  31 #include <subdev/bios.h>
  32 #include <subdev/clock.h>
  33 #include <subdev/timer.h>
  34 #include <subdev/fb.h>
  35
  36 static u32 read_clk(struct drm_device *, int, bool);
  37 static u32 read_pll(struct drm_device *, int, u32);
  38
  39 static u32
  40 read_vco(struct drm_device *dev, int clk)
  41 {
  42         struct nouveau_device *device = nouveau_dev(dev);
  43         u32 sctl = nv_rd32(device, 0x4120 + (clk * 4));
  44         if ((sctl & 0x00000030) != 0x00000030)
  45                 return read_pll(dev, 0x41, 0x00e820);
  46         return read_pll(dev, 0x42, 0x00e8a0);
  47 }
  48
  49 static u32
  50 read_clk(struct drm_device *dev, int clk, bool ignore_en)
  51 {
  52         struct nouveau_device *device = nouveau_dev(dev);
  53         struct nouveau_drm *drm = nouveau_drm(dev);
  54         u32 sctl, sdiv, sclk;
  55
  56         /* refclk for the 0xe8xx plls is a fixed frequency */
  57         if (clk >= 0x40) {
  58                 if (nv_device(drm->device)->chipset == 0xaf) {
  59                         /* no joke.. seriously.. sigh.. */
  60                         return nv_rd32(device, 0x00471c) * 1000;
  61                 }
  62
  63                 return device->crystal;
  64         }
  65
  66         sctl = nv_rd32(device, 0x4120 + (clk * 4));
  67         if (!ignore_en && !(sctl & 0x00000100))
  68                 return 0;
  69
  70         switch (sctl & 0x00003000) {
  71         case 0x00000000:
  72                 return device->crystal;
  73         case 0x00002000:
  74                 if (sctl & 0x00000040)
  75                         return 108000;
  76                 return 100000;
  77         case 0x00003000:
  78                 sclk = read_vco(dev, clk);
  79                 sdiv = ((sctl & 0x003f0000) >> 16) + 2;
  80                 return (sclk * 2) / sdiv;
  81         default:
  82                 return 0;
  83         }
  84 }
  85
  86 static u32
  87 read_pll(struct drm_device *dev, int clk, u32 pll)
  88 {
  89         struct nouveau_device *device = nouveau_dev(dev);
  90         u32 ctrl = nv_rd32(device, pll + 0);
  91         u32 sclk = 0, P = 1, N = 1, M = 1;
  92
  93         if (!(ctrl & 0x00000008)) {
  94                 if (ctrl & 0x00000001) {
  95                         u32 coef = nv_rd32(device, pll + 4);
  96                         M = (coef & 0x000000ff) >> 0;
  97                         N = (coef & 0x0000ff00) >> 8;
  98                         P = (coef & 0x003f0000) >> 16;
  99
 100                         /* no post-divider on these.. */
 101                         if ((pll & 0x00ff00) == 0x00e800)
 102                                 P = 1;
 103
 104                         sclk = read_clk(dev, 0x00 + clk, false);
 105                 }
 106         } else {
 107                 sclk = read_clk(dev, 0x10 + clk, false);
 108         }
 109
 110         if (M * P)
 111                 return sclk * N / (M * P);
 112         return 0;
 113 }
 114
 115 struct creg {
 116         u32 clk;
 117         u32 pll;
 118 };
 119
 120 static int
 121 calc_clk(struct drm_device *dev, int clk, u32 pll, u32 khz, struct creg *reg)
 122 {
 123         struct nouveau_drm *drm = nouveau_drm(dev);
 124         struct nouveau_device *device = nouveau_dev(dev);
 125         struct nouveau_bios *bios = nouveau_bios(device);
 126         struct nvbios_pll limits;
 127         u32 oclk, sclk, sdiv;
 128         int P, N, M, diff;
 129         int ret;
 130
 131         reg->pll = 0;
 132         reg->clk = 0;
 133         if (!khz) {
 134                 NV_DEBUG(drm, "no clock for 0x%04x/0x%02x\n", pll, clk);
 135                 return 0;
 136         }
 137
 138         switch (khz) {
 139         case 27000:
 140                 reg->clk = 0x00000100;
 141                 return khz;
 142         case 100000:
 143                 reg->clk = 0x00002100;
 144                 return khz;
 145         case 108000:
 146                 reg->clk = 0x00002140;
 147                 return khz;
 148         default:
 149                 sclk = read_vco(dev, clk);
 150                 sdiv = min((sclk * 2) / (khz - 2999), (u32)65);
 151                 /* if the clock has a PLL attached, and we can get a within
 152                  * [-2, 3) MHz of a divider, we'll disable the PLL and use
 153                  * the divider instead.
 154                  *
 155                  * divider can go as low as 2, limited here because NVIDIA
 156                  * and the VBIOS on my NVA8 seem to prefer using the PLL
 157                  * for 810MHz - is there a good reason?
 158                  */
 159                 if (sdiv > 4) {
 160                         oclk = (sclk * 2) / sdiv;
 161                         diff = khz - oclk;
 162                         if (!pll || (diff >= -2000 && diff < 3000)) {
 163                                 reg->clk = (((sdiv - 2) << 16) | 0x00003100);
 164                                 return oclk;
 165                         }
 166                 }
 167
 168                 if (!pll) {
 169                         NV_ERROR(drm, "bad freq %02x: %d %d\n", clk, khz, sclk);
 170                         return -ERANGE;
 171                 }
 172
 173                 break;
 174         }
 175
 176         ret = nvbios_pll_parse(bios, pll, &limits);
 177         if (ret)
 178                 return ret;
 179
 180         limits.refclk = read_clk(dev, clk - 0x10, true);
 181         if (!limits.refclk)
 182                 return -EINVAL;
 183
 184         ret = nva3_calc_pll(dev, &limits, khz, &N, NULL, &M, &P);
 185         if (ret >= 0) {
 186                 reg->clk = nv_rd32(device, 0x4120 + (clk * 4));
 187                 reg->pll = (P << 16) | (N << 8) | M;
 188         }
 189
 190         return ret;
 191 }
 192
 193 static void
 194 prog_pll(struct drm_device *dev, int clk, u32 pll, struct creg *reg)
 195 {
 196         struct nouveau_device *device = nouveau_dev(dev);
 197         struct nouveau_drm *drm = nouveau_drm(dev);
 198         const u32 src0 = 0x004120 + (clk * 4);
 199         const u32 src1 = 0x004160 + (clk * 4);
 200         const u32 ctrl = pll + 0;
 201         const u32 coef = pll + 4;
 202
 203         if (!reg->clk && !reg->pll) {
 204                 NV_DEBUG(drm, "no clock for %02x\n", clk);
 205                 return;
 206         }
 207
 208         if (reg->pll) {
 209                 nv_mask(device, src0, 0x00000101, 0x00000101);
 210                 nv_wr32(device, coef, reg->pll);
 211                 nv_mask(device, ctrl, 0x00000015, 0x00000015);
 212                 nv_mask(device, ctrl, 0x00000010, 0x00000000);
 213                 nv_wait(device, ctrl, 0x00020000, 0x00020000);
 214                 nv_mask(device, ctrl, 0x00000010, 0x00000010);
 215                 nv_mask(device, ctrl, 0x00000008, 0x00000000);
 216                 nv_mask(device, src1, 0x00000100, 0x00000000);
 217                 nv_mask(device, src1, 0x00000001, 0x00000000);
 218         } else {
 219                 nv_mask(device, src1, 0x003f3141, 0x00000101 | reg->clk);
 220                 nv_mask(device, ctrl, 0x00000018, 0x00000018);
 221                 udelay(20);
 222                 nv_mask(device, ctrl, 0x00000001, 0x00000000);
 223                 nv_mask(device, src0, 0x00000100, 0x00000000);
 224                 nv_mask(device, src0, 0x00000001, 0x00000000);
 225         }
 226 }
 227
 228 static void
 229 prog_clk(struct drm_device *dev, int clk, struct creg *reg)
 230 {
 231         struct nouveau_device *device = nouveau_dev(dev);
 232         struct nouveau_drm *drm = nouveau_drm(dev);
 233
 234         if (!reg->clk) {
 235                 NV_DEBUG(drm, "no clock for %02x\n", clk);
 236                 return;
 237         }
 238
 239         nv_mask(device, 0x004120 + (clk * 4), 0x003f3141, 0x00000101 | reg->clk);
 240 }
 241
 242 int
 243 nva3_pm_clocks_get(struct drm_device *dev, struct nouveau_pm_level *perflvl)
 244 {
 245         perflvl->core   = read_pll(dev, 0x00, 0x4200);
 246         perflvl->shader = read_pll(dev, 0x01, 0x4220);
 247         perflvl->memory = read_pll(dev, 0x02, 0x4000);
 248         perflvl->unka0  = read_clk(dev, 0x20, false);
 249         perflvl->vdec   = read_clk(dev, 0x21, false);
 250         perflvl->daemon = read_clk(dev, 0x25, false);
 251         perflvl->copy   = perflvl->core;
 252         return 0;
 253 }
 254
 255 struct nva3_pm_state {
 256         struct nouveau_pm_level *perflvl;
 257
 258         struct creg nclk;
 259         struct creg sclk;
 260         struct creg vdec;
 261         struct creg unka0;
 262
 263         struct creg mclk;
 264         u8 *rammap;
 265         u8  rammap_ver;
 266         u8  rammap_len;
 267         u8 *ramcfg;
 268         u8  ramcfg_len;
 269         u32 r004018;
 270         u32 r100760;
 271 };
 272
 273 void *
 274 nva3_pm_clocks_pre(struct drm_device *dev, struct nouveau_pm_level *perflvl)
 275 {
 276         struct nva3_pm_state *info;
 277         u8 ramcfg_cnt;
 278         int ret;
 279
 280         info = kzalloc(sizeof(*info), GFP_KERNEL);
 281         if (!info)
 282                 return ERR_PTR(-ENOMEM);
 283
 284         ret = calc_clk(dev, 0x10, 0x4200, perflvl->core, &info->nclk);
 285         if (ret < 0)
 286                 goto out;
 287
 288         ret = calc_clk(dev, 0x11, 0x4220, perflvl->shader, &info->sclk);
 289         if (ret < 0)
 290                 goto out;
 291
 292         ret = calc_clk(dev, 0x12, 0x4000, perflvl->memory, &info->mclk);
 293         if (ret < 0)
 294                 goto out;
 295
 296         ret = calc_clk(dev, 0x20, 0x0000, perflvl->unka0, &info->unka0);
 297         if (ret < 0)
 298                 goto out;
 299
 300         ret = calc_clk(dev, 0x21, 0x0000, perflvl->vdec, &info->vdec);
 301         if (ret < 0)
 302                 goto out;
 303
 304         info->rammap = nouveau_perf_rammap(dev, perflvl->memory,
 305                                            &info->rammap_ver,
 306                                            &info->rammap_len,
 307                                            &ramcfg_cnt, &info->ramcfg_len);
 308         if (info->rammap_ver != 0x10 || info->rammap_len < 5)
 309                 info->rammap = NULL;
 310
 311         info->ramcfg = nouveau_perf_ramcfg(dev, perflvl->memory,
 312                                            &info->rammap_ver,
 313                                            &info->ramcfg_len);
 314         if (info->rammap_ver != 0x10)
 315                 info->ramcfg = NULL;
 316
 317         info->perflvl = perflvl;
 318 out:
 319         if (ret < 0) {
 320                 kfree(info);
 321                 info = ERR_PTR(ret);
 322         }
 323         return info;
 324 }
 325
 326 static bool
 327 nva3_pm_grcp_idle(void *data)
 328 {
 329         struct drm_device *dev = data;
 330         struct nouveau_device *device = nouveau_dev(dev);
 331
 332         if (!(nv_rd32(device, 0x400304) & 0x00000001))
 333                 return true;
 334         if (nv_rd32(device, 0x400308) == 0x0050001c)
 335                 return true;
 336         return false;
 337 }
 338
 339 static void
 340 mclk_precharge(struct nouveau_mem_exec_func *exec)
 341 {
 342         struct nouveau_device *device = nouveau_dev(exec->dev);
 343         nv_wr32(device, 0x1002d4, 0x00000001);
 344 }
 345
 346 static void
 347 mclk_refresh(struct nouveau_mem_exec_func *exec)
 348 {
 349         struct nouveau_device *device = nouveau_dev(exec->dev);
 350         nv_wr32(device, 0x1002d0, 0x00000001);
 351 }
 352
 353 static void
 354 mclk_refresh_auto(struct nouveau_mem_exec_func *exec, bool enable)
 355 {
 356         struct nouveau_device *device = nouveau_dev(exec->dev);
 357         nv_wr32(device, 0x100210, enable ? 0x80000000 : 0x00000000);
 358 }
 359
 360 static void
 361 mclk_refresh_self(struct nouveau_mem_exec_func *exec, bool enable)
 362 {
 363         struct nouveau_device *device = nouveau_dev(exec->dev);
 364         nv_wr32(device, 0x1002dc, enable ? 0x00000001 : 0x00000000);
 365 }
 366
 367 static void
 368 mclk_wait(struct nouveau_mem_exec_func *exec, u32 nsec)
 369 {
 370         struct nouveau_device *device = nouveau_dev(exec->dev);
 371         volatile u32 post = nv_rd32(device, 0); (void)post;
 372         udelay((nsec + 500) / 1000);
 373 }
 374
 375 static u32
 376 mclk_mrg(struct nouveau_mem_exec_func *exec, int mr)
 377 {
 378         struct nouveau_device *device = nouveau_dev(exec->dev);
 379         if (mr <= 1)
 380                 return nv_rd32(device, 0x1002c0 + ((mr - 0) * 4));
 381         if (mr <= 3)
 382                 return nv_rd32(device, 0x1002e0 + ((mr - 2) * 4));
 383         return 0;
 384 }
 385
 386 static void
 387 mclk_mrs(struct nouveau_mem_exec_func *exec, int mr, u32 data)
 388 {
 389         struct nouveau_device *device = nouveau_dev(exec->dev);
 390         struct nouveau_fb *pfb = nouveau_fb(device);
 391         if (mr <= 1) {
 392                 if (pfb->ram.ranks > 1)
 393                         nv_wr32(device, 0x1002c8 + ((mr - 0) * 4), data);
 394                 nv_wr32(device, 0x1002c0 + ((mr - 0) * 4), data);
 395         } else
 396         if (mr <= 3) {
 397                 if (pfb->ram.ranks > 1)
 398                         nv_wr32(device, 0x1002e8 + ((mr - 2) * 4), data);
 399                 nv_wr32(device, 0x1002e0 + ((mr - 2) * 4), data);
 400         }
 401 }
 402
 403 static void
 404 mclk_clock_set(struct nouveau_mem_exec_func *exec)
 405 {
 406         struct nouveau_device *device = nouveau_dev(exec->dev);
 407         struct nva3_pm_state *info = exec->priv;
 408         u32 ctrl;
 409
 410         ctrl = nv_rd32(device, 0x004000);
 411         if (!(ctrl & 0x00000008) && info->mclk.pll) {
 412                 nv_wr32(device, 0x004000, (ctrl |=  0x00000008));
 413                 nv_mask(device, 0x1110e0, 0x00088000, 0x00088000);
 414                 nv_wr32(device, 0x004018, 0x00001000);
 415                 nv_wr32(device, 0x004000, (ctrl &= ~0x00000001));
 416                 nv_wr32(device, 0x004004, info->mclk.pll);
 417                 nv_wr32(device, 0x004000, (ctrl |=  0x00000001));
 418                 udelay(64);
 419                 nv_wr32(device, 0x004018, 0x00005000 | info->r004018);
 420                 udelay(20);
 421         } else
 422         if (!info->mclk.pll) {
 423                 nv_mask(device, 0x004168, 0x003f3040, info->mclk.clk);
 424                 nv_wr32(device, 0x004000, (ctrl |= 0x00000008));
 425                 nv_mask(device, 0x1110e0, 0x00088000, 0x00088000);
 426                 nv_wr32(device, 0x004018, 0x0000d000 | info->r004018);
 427         }
 428
 429         if (info->rammap) {
 430                 if (info->ramcfg && (info->rammap[4] & 0x08)) {
 431                         u32 unk5a0 = (ROM16(info->ramcfg[5]) << 8) |
 432                                       info->ramcfg[5];
 433                         u32 unk5a4 = ROM16(info->ramcfg[7]);
 434                         u32 unk804 = (info->ramcfg[9] & 0xf0) << 16 |
 435                                      (info->ramcfg[3] & 0x0f) << 16 |
 436                                      (info->ramcfg[9] & 0x0f) |
 437                                      0x80000000;
 438                         nv_wr32(device, 0x1005a0, unk5a0);
 439                         nv_wr32(device, 0x1005a4, unk5a4);
 440                         nv_wr32(device, 0x10f804, unk804);
 441                         nv_mask(device, 0x10053c, 0x00001000, 0x00000000);
 442                 } else {
 443                         nv_mask(device, 0x10053c, 0x00001000, 0x00001000);
 444                         nv_mask(device, 0x10f804, 0x80000000, 0x00000000);
 445                         nv_mask(device, 0x100760, 0x22222222, info->r100760);
 446                         nv_mask(device, 0x1007a0, 0x22222222, info->r100760);
 447                         nv_mask(device, 0x1007e0, 0x22222222, info->r100760);
 448                 }
 449         }
 450
 451         if (info->mclk.pll) {
 452                 nv_mask(device, 0x1110e0, 0x00088000, 0x00011000);
 453                 nv_wr32(device, 0x004000, (ctrl &= ~0x00000008));
 454         }
 455 }
 456
 457 static void
 458 mclk_timing_set(struct nouveau_mem_exec_func *exec)
 459 {
 460         struct nouveau_device *device = nouveau_dev(exec->dev);
 461         struct nva3_pm_state *info = exec->priv;
 462         struct nouveau_pm_level *perflvl = info->perflvl;
 463         int i;
 464
 465         for (i = 0; i < 9; i++)
 466                 nv_wr32(device, 0x100220 + (i * 4), perflvl->timing.reg[i]);
 467
 468         if (info->ramcfg) {
 469                 u32 data = (info->ramcfg[2] & 0x08) ? 0x00000000 : 0x00001000;
 470                 nv_mask(device, 0x100200, 0x00001000, data);
 471         }
 472
 473         if (info->ramcfg) {
 474                 u32 unk714 = nv_rd32(device, 0x100714) & ~0xf0000010;
 475                 u32 unk718 = nv_rd32(device, 0x100718) & ~0x00000100;
 476                 u32 unk71c = nv_rd32(device, 0x10071c) & ~0x00000100;
 477                 if ( (info->ramcfg[2] & 0x20))
 478                         unk714 |= 0xf0000000;
 479                 if (!(info->ramcfg[2] & 0x04))
 480                         unk714 |= 0x00000010;
 481                 nv_wr32(device, 0x100714, unk714);
 482
 483                 if (info->ramcfg[2] & 0x01)
 484                         unk71c |= 0x00000100;
 485                 nv_wr32(device, 0x10071c, unk71c);
 486
 487                 if (info->ramcfg[2] & 0x02)
 488                         unk718 |= 0x00000100;
 489                 nv_wr32(device, 0x100718, unk718);
 490
 491                 if (info->ramcfg[2] & 0x10)
 492                         nv_wr32(device, 0x111100, 0x48000000); /*XXX*/
 493         }
 494 }
 495
 496 static void
 497 prog_mem(struct drm_device *dev, struct nva3_pm_state *info)
 498 {
 499         struct nouveau_device *device = nouveau_dev(dev);
 500         struct nouveau_mem_exec_func exec = {
 501                 .dev = dev,
 502                 .precharge = mclk_precharge,
 503                 .refresh = mclk_refresh,
 504                 .refresh_auto = mclk_refresh_auto,
 505                 .refresh_self = mclk_refresh_self,
 506                 .wait = mclk_wait,
 507                 .mrg = mclk_mrg,
 508                 .mrs = mclk_mrs,
 509                 .clock_set = mclk_clock_set,
 510                 .timing_set = mclk_timing_set,
 511                 .priv = info
 512         };
 513         u32 ctrl;
 514
 515         /* XXX: where the fuck does 750MHz come from? */
 516         if (info->perflvl->memory <= 750000) {
 517                 info->r004018 = 0x10000000;
 518                 info->r100760 = 0x22222222;
 519         }
 520
 521         ctrl = nv_rd32(device, 0x004000);
 522         if (ctrl & 0x00000008) {
 523                 if (info->mclk.pll) {
 524                         nv_mask(device, 0x004128, 0x00000101, 0x00000101);
 525                         nv_wr32(device, 0x004004, info->mclk.pll);
 526                         nv_wr32(device, 0x004000, (ctrl |= 0x00000001));
 527                         nv_wr32(device, 0x004000, (ctrl &= 0xffffffef));
 528                         nv_wait(device, 0x004000, 0x00020000, 0x00020000);
 529                         nv_wr32(device, 0x004000, (ctrl |= 0x00000010));
 530                         nv_wr32(device, 0x004018, 0x00005000 | info->r004018);
 531                         nv_wr32(device, 0x004000, (ctrl |= 0x00000004));
 532                 }
 533         } else {
 534                 u32 ssel = 0x00000101;
 535                 if (info->mclk.clk)
 536                         ssel |= info->mclk.clk;
 537                 else
 538                         ssel |= 0x00080000; /* 324MHz, shouldn't matter... */
 539                 nv_mask(device, 0x004168, 0x003f3141, ctrl);
 540         }
 541
 542         if (info->ramcfg) {
 543                 if (info->ramcfg[2] & 0x10) {
 544                         nv_mask(device, 0x111104, 0x00000600, 0x00000000);
 545                 } else {
 546                         nv_mask(device, 0x111100, 0x40000000, 0x40000000);
 547                         nv_mask(device, 0x111104, 0x00000180, 0x00000000);
 548                 }
 549         }
 550         if (info->rammap && !(info->rammap[4] & 0x02))
 551                 nv_mask(device, 0x100200, 0x00000800, 0x00000000);
 552         nv_wr32(device, 0x611200, 0x00003300);
 553         if (!(info->ramcfg[2] & 0x10))
 554                 nv_wr32(device, 0x111100, 0x4c020000); /*XXX*/
 555
 556         nouveau_mem_exec(&exec, info->perflvl);
 557
 558         nv_wr32(device, 0x611200, 0x00003330);
 559         if (info->rammap && (info->rammap[4] & 0x02))
 560                 nv_mask(device, 0x100200, 0x00000800, 0x00000800);
 561         if (info->ramcfg) {
 562                 if (info->ramcfg[2] & 0x10) {
 563                         nv_mask(device, 0x111104, 0x00000180, 0x00000180);
 564                         nv_mask(device, 0x111100, 0x40000000, 0x00000000);
 565                 } else {
 566                         nv_mask(device, 0x111104, 0x00000600, 0x00000600);
 567                 }
 568         }
 569
 570         if (info->mclk.pll) {
 571                 nv_mask(device, 0x004168, 0x00000001, 0x00000000);
 572                 nv_mask(device, 0x004168, 0x00000100, 0x00000000);
 573         } else {
 574                 nv_mask(device, 0x004000, 0x00000001, 0x00000000);
 575                 nv_mask(device, 0x004128, 0x00000001, 0x00000000);
 576                 nv_mask(device, 0x004128, 0x00000100, 0x00000000);
 577         }
 578 }
 579
 580 int
 581 nva3_pm_clocks_set(struct drm_device *dev, void *pre_state)
 582 {
 583         struct nouveau_device *device = nouveau_dev(dev);
 584         struct nouveau_drm *drm = nouveau_drm(dev);
 585         struct nva3_pm_state *info = pre_state;
 586         int ret = -EAGAIN;
 587
 588         /* prevent any new grctx switches from starting */
 589         nv_wr32(device, 0x400324, 0x00000000);
 590         nv_wr32(device, 0x400328, 0x0050001c); /* wait flag 0x1c */
 591         /* wait for any pending grctx switches to complete */
 592         if (!nv_wait_cb(device, nva3_pm_grcp_idle, dev)) {
 593                 NV_ERROR(drm, "pm: ctxprog didn't go idle\n");
 594                 goto cleanup;
 595         }
 596         /* freeze PFIFO */
 597         nv_mask(device, 0x002504, 0x00000001, 0x00000001);
 598         if (!nv_wait(device, 0x002504, 0x00000010, 0x00000010)) {
 599                 NV_ERROR(drm, "pm: fifo didn't go idle\n");
 600                 goto cleanup;
 601         }
 602
 603         prog_pll(dev, 0x00, 0x004200, &info->nclk);
 604         prog_pll(dev, 0x01, 0x004220, &info->sclk);
 605         prog_clk(dev, 0x20, &info->unka0);
 606         prog_clk(dev, 0x21, &info->vdec);
 607
 608         if (info->mclk.clk || info->mclk.pll)
 609                 prog_mem(dev, info);
 610
 611         ret = 0;
 612
 613 cleanup:
 614         /* unfreeze PFIFO */
 615         nv_mask(device, 0x002504, 0x00000001, 0x00000000);
 616         /* restore ctxprog to normal */
 617         nv_wr32(device, 0x400324, 0x00000000);
 618         nv_wr32(device, 0x400328, 0x0070009c); /* set flag 0x1c */
 619         /* unblock it if necessary */
 620         if (nv_rd32(device, 0x400308) == 0x0050001c)
 621                 nv_mask(device, 0x400824, 0x10000000, 0x10000000);
 622         kfree(info);
 623         return ret;
 624 }