drivers/gpu/drm/nouveau/nv50_sor.c

   1 /*
   2  * Copyright (C) 2008 Maarten Maathuis.
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining
   6  * a copy of this software and associated documentation files (the
   7  * "Software"), to deal in the Software without restriction, including
   8  * without limitation the rights to use, copy, modify, merge, publish,
   9  * distribute, sublicense, and/or sell copies of the Software, and to
  10  * permit persons to whom the Software is furnished to do so, subject to
  11  * the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the
  14  * next paragraph) shall be included in all copies or substantial
  15  * portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  18  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  20  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  21  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  22  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  23  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  *
  25  */
  26
  27 #include "drmP.h"
  28 #include "drm_crtc_helper.h"
  29
  30 #define NOUVEAU_DMA_DEBUG (nouveau_reg_debug & NOUVEAU_REG_DEBUG_EVO)
  31 #include "nouveau_reg.h"
  32 #include "nouveau_drm.h"
  33 #include "nouveau_dma.h"
  34 #include "nouveau_encoder.h"
  35 #include "nouveau_connector.h"
  36 #include "nouveau_crtc.h"
  37 #include "nv50_display.h"
  38
  39 #include <subdev/timer.h>
  40
  41 static u32
  42 nv50_sor_dp_lane_map(struct drm_device *dev, struct dcb_output *dcb, u8 lane)
  43 {
  44         struct nouveau_drm *drm = nouveau_drm(dev);
  45         static const u8 nvaf[] = { 24, 16, 8, 0 }; /* thanks, apple.. */
  46         static const u8 nv50[] = { 16, 8, 0, 24 };
  47         if (nv_device(drm->device)->chipset == 0xaf)
  48                 return nvaf[lane];
  49         return nv50[lane];
  50 }
  51
  52 static void
  53 nv50_sor_dp_train_set(struct drm_device *dev, struct dcb_output *dcb, u8 pattern)
  54 {
  55         struct nouveau_device *device = nouveau_dev(dev);
  56         u32 or = ffs(dcb->or) - 1, link = !(dcb->sorconf.link & 1);
  57         nv_mask(device, NV50_SOR_DP_CTRL(or, link), 0x0f000000, pattern << 24);
  58 }
  59
  60 static void
  61 nv50_sor_dp_train_adj(struct drm_device *dev, struct dcb_output *dcb,
  62                       u8 lane, u8 swing, u8 preem)
  63 {
  64         struct nouveau_device *device = nouveau_dev(dev);
  65         struct nouveau_drm *drm = nouveau_drm(dev);
  66         u32 or = ffs(dcb->or) - 1, link = !(dcb->sorconf.link & 1);
  67         u32 shift = nv50_sor_dp_lane_map(dev, dcb, lane);
  68         u32 mask = 0x000000ff << shift;
  69         u8 *table, *entry, *config;
  70
  71         table = nouveau_dp_bios_data(dev, dcb, &entry);
  72         if (!table || (table[0] != 0x20 && table[0] != 0x21)) {
  73                 NV_ERROR(drm, "PDISP: unsupported DP table for chipset\n");
  74                 return;
  75         }
  76
  77         config = entry + table[4];
  78         while (config[0] != swing || config[1] != preem) {
  79                 config += table[5];
  80                 if (config >= entry + table[4] + entry[4] * table[5])
  81                         return;
  82         }
  83
  84         nv_mask(device, NV50_SOR_DP_UNK118(or, link), mask, config[2] << shift);
  85         nv_mask(device, NV50_SOR_DP_UNK120(or, link), mask, config[3] << shift);
  86         nv_mask(device, NV50_SOR_DP_UNK130(or, link), 0x0000ff00, config[4] << 8);
  87 }
  88
  89 static void
  90 nv50_sor_dp_link_set(struct drm_device *dev, struct dcb_output *dcb, int crtc,
  91                      int link_nr, u32 link_bw, bool enhframe)
  92 {
  93         struct nouveau_device *device = nouveau_dev(dev);
  94         struct nouveau_drm *drm = nouveau_drm(dev);
  95         u32 or = ffs(dcb->or) - 1, link = !(dcb->sorconf.link & 1);
  96         u32 dpctrl = nv_rd32(device, NV50_SOR_DP_CTRL(or, link)) & ~0x001f4000;
  97         u32 clksor = nv_rd32(device, 0x614300 + (or * 0x800)) & ~0x000c0000;
  98         u8 *table, *entry, mask;
  99         int i;
 100
 101         table = nouveau_dp_bios_data(dev, dcb, &entry);
 102         if (!table || (table[0] != 0x20 && table[0] != 0x21)) {
 103                 NV_ERROR(drm, "PDISP: unsupported DP table for chipset\n");
 104                 return;
 105         }
 106
 107         entry = ROMPTR(dev, entry[10]);
 108         if (entry) {
 109                 while (link_bw < ROM16(entry[0]) * 10)
 110                         entry += 4;
 111
 112                 nouveau_bios_run_init_table(dev, ROM16(entry[2]), dcb, crtc);
 113         }
 114
 115         dpctrl |= ((1 << link_nr) - 1) << 16;
 116         if (enhframe)
 117                 dpctrl |= 0x00004000;
 118
 119         if (link_bw > 162000)
 120                 clksor |= 0x00040000;
 121
 122         nv_wr32(device, 0x614300 + (or * 0x800), clksor);
 123         nv_wr32(device, NV50_SOR_DP_CTRL(or, link), dpctrl);
 124
 125         mask = 0;
 126         for (i = 0; i < link_nr; i++)
 127                 mask |= 1 << (nv50_sor_dp_lane_map(dev, dcb, i) >> 3);
 128         nv_mask(device, NV50_SOR_DP_UNK130(or, link), 0x0000000f, mask);
 129 }
 130
 131 static void
 132 nv50_sor_dp_link_get(struct drm_device *dev, u32 or, u32 link, u32 *nr, u32 *bw)
 133 {
 134         struct nouveau_device *device = nouveau_dev(dev);
 135         u32 dpctrl = nv_rd32(device, NV50_SOR_DP_CTRL(or, link)) & 0x000f0000;
 136         u32 clksor = nv_rd32(device, 0x614300 + (or * 0x800));
 137         if (clksor & 0x000c0000)
 138                 *bw = 270000;
 139         else
 140                 *bw = 162000;
 141
 142         if      (dpctrl > 0x00030000) *nr = 4;
 143         else if (dpctrl > 0x00010000) *nr = 2;
 144         else                          *nr = 1;
 145 }
 146
 147 void
 148 nv50_sor_dp_calc_tu(struct drm_device *dev, int or, int link, u32 clk, u32 bpp)
 149 {
 150         struct nouveau_device *device = nouveau_dev(dev);
 151         struct nouveau_drm *drm = nouveau_drm(dev);
 152         const u32 symbol = 100000;
 153         int bestTU = 0, bestVTUi = 0, bestVTUf = 0, bestVTUa = 0;
 154         int TU, VTUi, VTUf, VTUa;
 155         u64 link_data_rate, link_ratio, unk;
 156         u32 best_diff = 64 * symbol;
 157         u32 link_nr, link_bw, r;
 158
 159         /* calculate packed data rate for each lane */
 160         nv50_sor_dp_link_get(dev, or, link, &link_nr, &link_bw);
 161         link_data_rate = (clk * bpp / 8) / link_nr;
 162
 163         /* calculate ratio of packed data rate to link symbol rate */
 164         link_ratio = link_data_rate * symbol;
 165         r = do_div(link_ratio, link_bw);
 166
 167         for (TU = 64; TU >= 32; TU--) {
 168                 /* calculate average number of valid symbols in each TU */
 169                 u32 tu_valid = link_ratio * TU;
 170                 u32 calc, diff;
 171
 172                 /* find a hw representation for the fraction.. */
 173                 VTUi = tu_valid / symbol;
 174                 calc = VTUi * symbol;
 175                 diff = tu_valid - calc;
 176                 if (diff) {
 177                         if (diff >= (symbol / 2)) {
 178                                 VTUf = symbol / (symbol - diff);
 179                                 if (symbol - (VTUf * diff))
 180                                         VTUf++;
 181
 182                                 if (VTUf <= 15) {
 183                                         VTUa  = 1;
 184                                         calc += symbol - (symbol / VTUf);
 185                                 } else {
 186                                         VTUa  = 0;
 187                                         VTUf  = 1;
 188                                         calc += symbol;
 189                                 }
 190                         } else {
 191                                 VTUa  = 0;
 192                                 VTUf  = min((int)(symbol / diff), 15);
 193                                 calc += symbol / VTUf;
 194                         }
 195
 196                         diff = calc - tu_valid;
 197                 } else {
 198                         /* no remainder, but the hw doesn't like the fractional
 199                          * part to be zero.  decrement the integer part and
 200                          * have the fraction add a whole symbol back
 201                          */
 202                         VTUa = 0;
 203                         VTUf = 1;
 204                         VTUi--;
 205                 }
 206
 207                 if (diff < best_diff) {
 208                         best_diff = diff;
 209                         bestTU = TU;
 210                         bestVTUa = VTUa;
 211                         bestVTUf = VTUf;
 212                         bestVTUi = VTUi;
 213                         if (diff == 0)
 214                                 break;
 215                 }
 216         }
 217
 218         if (!bestTU) {
 219                 NV_ERROR(drm, "DP: unable to find suitable config\n");
 220                 return;
 221         }
 222
 223         /* XXX close to vbios numbers, but not right */
 224         unk  = (symbol - link_ratio) * bestTU;
 225         unk *= link_ratio;
 226         r = do_div(unk, symbol);
 227         r = do_div(unk, symbol);
 228         unk += 6;
 229
 230         nv_mask(device, NV50_SOR_DP_CTRL(or, link), 0x000001fc, bestTU << 2);
 231         nv_mask(device, NV50_SOR_DP_SCFG(or, link), 0x010f7f3f, bestVTUa << 24 |
 232                                                              bestVTUf << 16 |
 233                                                              bestVTUi << 8 |
 234                                                              unk);
 235 }
 236 static void
 237 nv50_sor_disconnect(struct drm_encoder *encoder)
 238 {
 239         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
 240         struct nouveau_drm *drm = nouveau_drm(encoder->dev);
 241         struct drm_device *dev = encoder->dev;
 242         struct nouveau_channel *evo = nv50_display(dev)->master;
 243         int ret;
 244
 245         if (!nv_encoder->crtc)
 246                 return;
 247         nv50_crtc_blank(nouveau_crtc(nv_encoder->crtc), true);
 248
 249         NV_DEBUG(drm, "Disconnecting SOR %d\n", nv_encoder->or);
 250
 251         ret = RING_SPACE(evo, 4);
 252         if (ret) {
 253                 NV_ERROR(drm, "no space while disconnecting SOR\n");
 254                 return;
 255         }
 256         BEGIN_NV04(evo, 0, NV50_EVO_SOR(nv_encoder->or, MODE_CTRL), 1);
 257         OUT_RING  (evo, 0);
 258         BEGIN_NV04(evo, 0, NV50_EVO_UPDATE, 1);
 259         OUT_RING  (evo, 0);
 260
 261         nouveau_hdmi_mode_set(encoder, NULL);
 262
 263         nv_encoder->crtc = NULL;
 264         nv_encoder->last_dpms = DRM_MODE_DPMS_OFF;
 265 }
 266
 267 static void
 268 nv50_sor_dpms(struct drm_encoder *encoder, int mode)
 269 {
 270         struct nouveau_device *device = nouveau_dev(encoder->dev);
 271         struct nouveau_drm *drm = nouveau_drm(encoder->dev);
 272         struct drm_device *dev = encoder->dev;
 273         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
 274         struct drm_encoder *enc;
 275         uint32_t val;
 276         int or = nv_encoder->or;
 277
 278         NV_DEBUG(drm, "or %d type %d mode %d\n", or, nv_encoder->dcb->type, mode);
 279
 280         nv_encoder->last_dpms = mode;
 281         list_for_each_entry(enc, &dev->mode_config.encoder_list, head) {
 282                 struct nouveau_encoder *nvenc = nouveau_encoder(enc);
 283
 284                 if (nvenc == nv_encoder ||
 285                     (nvenc->dcb->type != DCB_OUTPUT_TMDS &&
 286                      nvenc->dcb->type != DCB_OUTPUT_LVDS &&
 287                      nvenc->dcb->type != DCB_OUTPUT_DP) ||
 288                     nvenc->dcb->or != nv_encoder->dcb->or)
 289                         continue;
 290
 291                 if (nvenc->last_dpms == DRM_MODE_DPMS_ON)
 292                         return;
 293         }
 294
 295         /* wait for it to be done */
 296         if (!nv_wait(device, NV50_PDISPLAY_SOR_DPMS_CTRL(or),
 297                      NV50_PDISPLAY_SOR_DPMS_CTRL_PENDING, 0)) {
 298                 NV_ERROR(drm, "timeout: SOR_DPMS_CTRL_PENDING(%d) == 0\n", or);
 299                 NV_ERROR(drm, "SOR_DPMS_CTRL(%d) = 0x%08x\n", or,
 300                          nv_rd32(device, NV50_PDISPLAY_SOR_DPMS_CTRL(or)));
 301         }
 302
 303         val = nv_rd32(device, NV50_PDISPLAY_SOR_DPMS_CTRL(or));
 304
 305         if (mode == DRM_MODE_DPMS_ON)
 306                 val |= NV50_PDISPLAY_SOR_DPMS_CTRL_ON;
 307         else
 308                 val &= ~NV50_PDISPLAY_SOR_DPMS_CTRL_ON;
 309
 310         nv_wr32(device, NV50_PDISPLAY_SOR_DPMS_CTRL(or), val |
 311                 NV50_PDISPLAY_SOR_DPMS_CTRL_PENDING);
 312         if (!nv_wait(device, NV50_PDISPLAY_SOR_DPMS_STATE(or),
 313                      NV50_PDISPLAY_SOR_DPMS_STATE_WAIT, 0)) {
 314                 NV_ERROR(drm, "timeout: SOR_DPMS_STATE_WAIT(%d) == 0\n", or);
 315                 NV_ERROR(drm, "SOR_DPMS_STATE(%d) = 0x%08x\n", or,
 316                          nv_rd32(device, NV50_PDISPLAY_SOR_DPMS_STATE(or)));
 317         }
 318
 319         if (nv_encoder->dcb->type == DCB_OUTPUT_DP) {
 320                 struct dp_train_func func = {
 321                         .link_set = nv50_sor_dp_link_set,
 322                         .train_set = nv50_sor_dp_train_set,
 323                         .train_adj = nv50_sor_dp_train_adj
 324                 };
 325
 326                 nouveau_dp_dpms(encoder, mode, nv_encoder->dp.datarate, &func);
 327         }
 328 }
 329
 330 static void
 331 nv50_sor_save(struct drm_encoder *encoder)
 332 {
 333         struct nouveau_drm *drm = nouveau_drm(encoder->dev);
 334         NV_ERROR(drm, "!!\n");
 335 }
 336
 337 static void
 338 nv50_sor_restore(struct drm_encoder *encoder)
 339 {
 340         struct nouveau_drm *drm = nouveau_drm(encoder->dev);
 341         NV_ERROR(drm, "!!\n");
 342 }
 343
 344 static bool
 345 nv50_sor_mode_fixup(struct drm_encoder *encoder,
 346                     const struct drm_display_mode *mode,
 347                     struct drm_display_mode *adjusted_mode)
 348 {
 349         struct nouveau_drm *drm = nouveau_drm(encoder->dev);
 350         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
 351         struct nouveau_connector *connector;
 352
 353         NV_DEBUG(drm, "or %d\n", nv_encoder->or);
 354
 355         connector = nouveau_encoder_connector_get(nv_encoder);
 356         if (!connector) {
 357                 NV_ERROR(drm, "Encoder has no connector\n");
 358                 return false;
 359         }
 360
 361         if (connector->scaling_mode != DRM_MODE_SCALE_NONE &&
 362              connector->native_mode)
 363                 drm_mode_copy(adjusted_mode, connector->native_mode);
 364
 365         return true;
 366 }
 367
 368 static void
 369 nv50_sor_prepare(struct drm_encoder *encoder)
 370 {
 371         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
 372         nv50_sor_disconnect(encoder);
 373         if (nv_encoder->dcb->type == DCB_OUTPUT_DP) {
 374                 /* avoid race between link training and supervisor intr */
 375                 nv50_display_sync(encoder->dev);
 376         }
 377 }
 378
 379 static void
 380 nv50_sor_commit(struct drm_encoder *encoder)
 381 {
 382 }
 383
 384 static void
 385 nv50_sor_mode_set(struct drm_encoder *encoder, struct drm_display_mode *umode,
 386                   struct drm_display_mode *mode)
 387 {
 388         struct nouveau_channel *evo = nv50_display(encoder->dev)->master;
 389         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
 390         struct nouveau_drm *drm = nouveau_drm(encoder->dev);
 391         struct nouveau_crtc *crtc = nouveau_crtc(encoder->crtc);
 392         struct nouveau_connector *nv_connector;
 393         uint32_t mode_ctl = 0;
 394         int ret;
 395
 396         NV_DEBUG(drm, "or %d type %d -> crtc %d\n",
 397                      nv_encoder->or, nv_encoder->dcb->type, crtc->index);
 398         nv_encoder->crtc = encoder->crtc;
 399
 400         switch (nv_encoder->dcb->type) {
 401         case DCB_OUTPUT_TMDS:
 402                 if (nv_encoder->dcb->sorconf.link & 1) {
 403                         if (mode->clock < 165000)
 404                                 mode_ctl = 0x0100;
 405                         else
 406                                 mode_ctl = 0x0500;
 407                 } else
 408                         mode_ctl = 0x0200;
 409
 410                 nouveau_hdmi_mode_set(encoder, mode);
 411                 break;
 412         case DCB_OUTPUT_DP:
 413                 nv_connector = nouveau_encoder_connector_get(nv_encoder);
 414                 if (nv_connector && nv_connector->base.display_info.bpc == 6) {
 415                         nv_encoder->dp.datarate = mode->clock * 18 / 8;
 416                         mode_ctl |= 0x00020000;
 417                 } else {
 418                         nv_encoder->dp.datarate = mode->clock * 24 / 8;
 419                         mode_ctl |= 0x00050000;
 420                 }
 421
 422                 if (nv_encoder->dcb->sorconf.link & 1)
 423                         mode_ctl |= 0x00000800;
 424                 else
 425                         mode_ctl |= 0x00000900;
 426                 break;
 427         default:
 428                 break;
 429         }
 430
 431         if (crtc->index == 1)
 432                 mode_ctl |= NV50_EVO_SOR_MODE_CTRL_CRTC1;
 433         else
 434                 mode_ctl |= NV50_EVO_SOR_MODE_CTRL_CRTC0;
 435
 436         if (mode->flags & DRM_MODE_FLAG_NHSYNC)
 437                 mode_ctl |= NV50_EVO_SOR_MODE_CTRL_NHSYNC;
 438
 439         if (mode->flags & DRM_MODE_FLAG_NVSYNC)
 440                 mode_ctl |= NV50_EVO_SOR_MODE_CTRL_NVSYNC;
 441
 442         nv50_sor_dpms(encoder, DRM_MODE_DPMS_ON);
 443
 444         ret = RING_SPACE(evo, 2);
 445         if (ret) {
 446                 NV_ERROR(drm, "no space while connecting SOR\n");
 447                 nv_encoder->crtc = NULL;
 448                 return;
 449         }
 450         BEGIN_NV04(evo, 0, NV50_EVO_SOR(nv_encoder->or, MODE_CTRL), 1);
 451         OUT_RING(evo, mode_ctl);
 452 }
 453
 454 static struct drm_crtc *
 455 nv50_sor_crtc_get(struct drm_encoder *encoder)
 456 {
 457         return nouveau_encoder(encoder)->crtc;
 458 }
 459
 460 static const struct drm_encoder_helper_funcs nv50_sor_helper_funcs = {
 461         .dpms = nv50_sor_dpms,
 462         .save = nv50_sor_save,
 463         .restore = nv50_sor_restore,
 464         .mode_fixup = nv50_sor_mode_fixup,
 465         .prepare = nv50_sor_prepare,
 466         .commit = nv50_sor_commit,
 467         .mode_set = nv50_sor_mode_set,
 468         .get_crtc = nv50_sor_crtc_get,
 469         .detect = NULL,
 470         .disable = nv50_sor_disconnect
 471 };
 472
 473 static void
 474 nv50_sor_destroy(struct drm_encoder *encoder)
 475 {
 476         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
 477         struct nouveau_drm *drm = nouveau_drm(encoder->dev);
 478
 479         NV_DEBUG(drm, "\n");
 480
 481         drm_encoder_cleanup(encoder);
 482
 483         kfree(nv_encoder);
 484 }
 485
 486 static const struct drm_encoder_funcs nv50_sor_encoder_funcs = {
 487         .destroy = nv50_sor_destroy,
 488 };
 489
 490 int
 491 nv50_sor_create(struct drm_connector *connector, struct dcb_output *entry)
 492 {
 493         struct nouveau_encoder *nv_encoder = NULL;
 494         struct drm_device *dev = connector->dev;
 495         struct nouveau_drm *drm = nouveau_drm(dev);
 496         struct drm_encoder *encoder;
 497         int type;
 498
 499         NV_DEBUG(drm, "\n");
 500
 501         switch (entry->type) {
 502         case DCB_OUTPUT_TMDS:
 503         case DCB_OUTPUT_DP:
 504                 type = DRM_MODE_ENCODER_TMDS;
 505                 break;
 506         case DCB_OUTPUT_LVDS:
 507                 type = DRM_MODE_ENCODER_LVDS;
 508                 break;
 509         default:
 510                 return -EINVAL;
 511         }
 512
 513         nv_encoder = kzalloc(sizeof(*nv_encoder), GFP_KERNEL);
 514         if (!nv_encoder)
 515                 return -ENOMEM;
 516         encoder = to_drm_encoder(nv_encoder);
 517
 518         nv_encoder->dcb = entry;
 519         nv_encoder->or = ffs(entry->or) - 1;
 520         nv_encoder->last_dpms = DRM_MODE_DPMS_OFF;
 521
 522         drm_encoder_init(dev, encoder, &nv50_sor_encoder_funcs, type);
 523         drm_encoder_helper_add(encoder, &nv50_sor_helper_funcs);
 524
 525         encoder->possible_crtcs = entry->heads;
 526         encoder->possible_clones = 0;
 527
 528         drm_mode_connector_attach_encoder(connector, encoder);
 529         return 0;
 530 }