drivers/gpu/drm/nouveau/dispnv50/disp.c

   1 /*
   2  * Copyright 2011 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 #include "disp.h"
  25 #include "atom.h"
  26 #include "core.h"
  27 #include "head.h"
  28 #include "wndw.h"
  29
  30 #include <linux/dma-mapping.h>
  31 #include <linux/hdmi.h>
  32
  33 #include <drm/drmP.h>
  34 #include <drm/drm_atomic_helper.h>
  35 #include <drm/drm_crtc_helper.h>
  36 #include <drm/drm_dp_helper.h>
  37 #include <drm/drm_fb_helper.h>
  38 #include <drm/drm_plane_helper.h>
  39 #include <drm/drm_scdc_helper.h>
  40 #include <drm/drm_edid.h>
  41
  42 #include <nvif/class.h>
  43 #include <nvif/cl0002.h>
  44 #include <nvif/cl5070.h>
  45 #include <nvif/cl507d.h>
  46 #include <nvif/event.h>
  47
  48 #include "nouveau_drv.h"
  49 #include "nouveau_dma.h"
  50 #include "nouveau_gem.h"
  51 #include "nouveau_connector.h"
  52 #include "nouveau_encoder.h"
  53 #include "nouveau_fence.h"
  54 #include "nouveau_fbcon.h"
  55
  56 #include <subdev/bios/dp.h>
  57
  58 /******************************************************************************
  59  * Atomic state
  60  *****************************************************************************/
  61
  62 struct nv50_outp_atom {
  63         struct list_head head;
  64
  65         struct drm_encoder *encoder;
  66         bool flush_disable;
  67
  68         union nv50_outp_atom_mask {
  69                 struct {
  70                         bool ctrl:1;
  71                 };
  72                 u8 mask;
  73         } set, clr;
  74 };
  75
  76 /******************************************************************************
  77  * EVO channel
  78  *****************************************************************************/
  79
  80 static int
  81 nv50_chan_create(struct nvif_device *device, struct nvif_object *disp,
  82                  const s32 *oclass, u8 head, void *data, u32 size,
  83                  struct nv50_chan *chan)
  84 {
  85         struct nvif_sclass *sclass;
  86         int ret, i, n;
  87
  88         chan->device = device;
  89
  90         ret = n = nvif_object_sclass_get(disp, &sclass);
  91         if (ret < 0)
  92                 return ret;
  93
  94         while (oclass[0]) {
  95                 for (i = 0; i < n; i++) {
  96                         if (sclass[i].oclass == oclass[0]) {
  97                                 ret = nvif_object_init(disp, 0, oclass[0],
  98                                                        data, size, &chan->user);
  99                                 if (ret == 0)
 100                                         nvif_object_map(&chan->user, NULL, 0);
 101                                 nvif_object_sclass_put(&sclass);
 102                                 return ret;
 103                         }
 104                 }
 105                 oclass++;
 106         }
 107
 108         nvif_object_sclass_put(&sclass);
 109         return -ENOSYS;
 110 }
 111
 112 static void
 113 nv50_chan_destroy(struct nv50_chan *chan)
 114 {
 115         nvif_object_fini(&chan->user);
 116 }
 117
 118 /******************************************************************************
 119  * DMA EVO channel
 120  *****************************************************************************/
 121
 122 void
 123 nv50_dmac_destroy(struct nv50_dmac *dmac)
 124 {
 125         nvif_object_fini(&dmac->vram);
 126         nvif_object_fini(&dmac->sync);
 127
 128         nv50_chan_destroy(&dmac->base);
 129
 130         nvif_mem_fini(&dmac->push);
 131 }
 132
 133 int
 134 nv50_dmac_create(struct nvif_device *device, struct nvif_object *disp,
 135                  const s32 *oclass, u8 head, void *data, u32 size, u64 syncbuf,
 136                  struct nv50_dmac *dmac)
 137 {
 138         struct nouveau_cli *cli = (void *)device->object.client;
 139         struct nv50_disp_core_channel_dma_v0 *args = data;
 140         u8 type = NVIF_MEM_COHERENT;
 141         int ret;
 142
 143         mutex_init(&dmac->lock);
 144
 145         /* Pascal added support for 47-bit physical addresses, but some
 146          * parts of EVO still only accept 40-bit PAs.
 147          *
 148          * To avoid issues on systems with large amounts of RAM, and on
 149          * systems where an IOMMU maps pages at a high address, we need
 150          * to allocate push buffers in VRAM instead.
 151          *
 152          * This appears to match NVIDIA's behaviour on Pascal.
 153          */
 154         if (device->info.family == NV_DEVICE_INFO_V0_PASCAL)
 155                 type |= NVIF_MEM_VRAM;
 156
 157         ret = nvif_mem_init_map(&cli->mmu, type, 0x1000, &dmac->push);
 158         if (ret)
 159                 return ret;
 160
 161         dmac->ptr = dmac->push.object.map.ptr;
 162
 163         args->pushbuf = nvif_handle(&dmac->push.object);
 164
 165         ret = nv50_chan_create(device, disp, oclass, head, data, size,
 166                                &dmac->base);
 167         if (ret)
 168                 return ret;
 169
 170         if (!syncbuf)
 171                 return 0;
 172
 173         ret = nvif_object_init(&dmac->base.user, 0xf0000000, NV_DMA_IN_MEMORY,
 174                                &(struct nv_dma_v0) {
 175                                         .target = NV_DMA_V0_TARGET_VRAM,
 176                                         .access = NV_DMA_V0_ACCESS_RDWR,
 177                                         .start = syncbuf + 0x0000,
 178                                         .limit = syncbuf + 0x0fff,
 179                                }, sizeof(struct nv_dma_v0),
 180                                &dmac->sync);
 181         if (ret)
 182                 return ret;
 183
 184         ret = nvif_object_init(&dmac->base.user, 0xf0000001, NV_DMA_IN_MEMORY,
 185                                &(struct nv_dma_v0) {
 186                                         .target = NV_DMA_V0_TARGET_VRAM,
 187                                         .access = NV_DMA_V0_ACCESS_RDWR,
 188                                         .start = 0,
 189                                         .limit = device->info.ram_user - 1,
 190                                }, sizeof(struct nv_dma_v0),
 191                                &dmac->vram);
 192         if (ret)
 193                 return ret;
 194
 195         return ret;
 196 }
 197
 198 /******************************************************************************
 199  * EVO channel helpers
 200  *****************************************************************************/
 201 static void
 202 evo_flush(struct nv50_dmac *dmac)
 203 {
 204         /* Push buffer fetches are not coherent with BAR1, we need to ensure
 205          * writes have been flushed right through to VRAM before writing PUT.
 206          */
 207         if (dmac->push.type & NVIF_MEM_VRAM) {
 208                 struct nvif_device *device = dmac->base.device;
 209                 nvif_wr32(&device->object, 0x070000, 0x00000001);
 210                 nvif_msec(device, 2000,
 211                         if (!(nvif_rd32(&device->object, 0x070000) & 0x00000002))
 212                                 break;
 213                 );
 214         }
 215 }
 216
 217 u32 *
 218 evo_wait(struct nv50_dmac *evoc, int nr)
 219 {
 220         struct nv50_dmac *dmac = evoc;
 221         struct nvif_device *device = dmac->base.device;
 222         u32 put = nvif_rd32(&dmac->base.user, 0x0000) / 4;
 223
 224         mutex_lock(&dmac->lock);
 225         if (put + nr >= (PAGE_SIZE / 4) - 8) {
 226                 dmac->ptr[put] = 0x20000000;
 227                 evo_flush(dmac);
 228
 229                 nvif_wr32(&dmac->base.user, 0x0000, 0x00000000);
 230                 if (nvif_msec(device, 2000,
 231                         if (!nvif_rd32(&dmac->base.user, 0x0004))
 232                                 break;
 233                 ) < 0) {
 234                         mutex_unlock(&dmac->lock);
 235                         pr_err("nouveau: evo channel stalled\n");
 236                         return NULL;
 237                 }
 238
 239                 put = 0;
 240         }
 241
 242         return dmac->ptr + put;
 243 }
 244
 245 void
 246 evo_kick(u32 *push, struct nv50_dmac *evoc)
 247 {
 248         struct nv50_dmac *dmac = evoc;
 249
 250         evo_flush(dmac);
 251
 252         nvif_wr32(&dmac->base.user, 0x0000, (push - dmac->ptr) << 2);
 253         mutex_unlock(&dmac->lock);
 254 }
 255
 256 /******************************************************************************
 257  * Output path helpers
 258  *****************************************************************************/
 259 static void
 260 nv50_outp_release(struct nouveau_encoder *nv_encoder)
 261 {
 262         struct nv50_disp *disp = nv50_disp(nv_encoder->base.base.dev);
 263         struct {
 264                 struct nv50_disp_mthd_v1 base;
 265         } args = {
 266                 .base.version = 1,
 267                 .base.method = NV50_DISP_MTHD_V1_RELEASE,
 268                 .base.hasht  = nv_encoder->dcb->hasht,
 269                 .base.hashm  = nv_encoder->dcb->hashm,
 270         };
 271
 272         nvif_mthd(&disp->disp->object, 0, &args, sizeof(args));
 273         nv_encoder->or = -1;
 274         nv_encoder->link = 0;
 275 }
 276
 277 static int
 278 nv50_outp_acquire(struct nouveau_encoder *nv_encoder)
 279 {
 280         struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
 281         struct nv50_disp *disp = nv50_disp(drm->dev);
 282         struct {
 283                 struct nv50_disp_mthd_v1 base;
 284                 struct nv50_disp_acquire_v0 info;
 285         } args = {
 286                 .base.version = 1,
 287                 .base.method = NV50_DISP_MTHD_V1_ACQUIRE,
 288                 .base.hasht  = nv_encoder->dcb->hasht,
 289                 .base.hashm  = nv_encoder->dcb->hashm,
 290         };
 291         int ret;
 292
 293         ret = nvif_mthd(&disp->disp->object, 0, &args, sizeof(args));
 294         if (ret) {
 295                 NV_ERROR(drm, "error acquiring output path: %d\n", ret);
 296                 return ret;
 297         }
 298
 299         nv_encoder->or = args.info.or;
 300         nv_encoder->link = args.info.link;
 301         return 0;
 302 }
 303
 304 static int
 305 nv50_outp_atomic_check_view(struct drm_encoder *encoder,
 306                             struct drm_crtc_state *crtc_state,
 307                             struct drm_connector_state *conn_state,
 308                             struct drm_display_mode *native_mode)
 309 {
 310         struct drm_display_mode *adjusted_mode = &crtc_state->adjusted_mode;
 311         struct drm_display_mode *mode = &crtc_state->mode;
 312         struct drm_connector *connector = conn_state->connector;
 313         struct nouveau_conn_atom *asyc = nouveau_conn_atom(conn_state);
 314         struct nouveau_drm *drm = nouveau_drm(encoder->dev);
 315
 316         NV_ATOMIC(drm, "%s atomic_check\n", encoder->name);
 317         asyc->scaler.full = false;
 318         if (!native_mode)
 319                 return 0;
 320
 321         if (asyc->scaler.mode == DRM_MODE_SCALE_NONE) {
 322                 switch (connector->connector_type) {
 323                 case DRM_MODE_CONNECTOR_LVDS:
 324                 case DRM_MODE_CONNECTOR_eDP:
 325                         /* Force use of scaler for non-EDID modes. */
 326                         if (adjusted_mode->type & DRM_MODE_TYPE_DRIVER)
 327                                 break;
 328                         mode = native_mode;
 329                         asyc->scaler.full = true;
 330                         break;
 331                 default:
 332                         break;
 333                 }
 334         } else {
 335                 mode = native_mode;
 336         }
 337
 338         if (!drm_mode_equal(adjusted_mode, mode)) {
 339                 drm_mode_copy(adjusted_mode, mode);
 340                 crtc_state->mode_changed = true;
 341         }
 342
 343         return 0;
 344 }
 345
 346 static int
 347 nv50_outp_atomic_check(struct drm_encoder *encoder,
 348                        struct drm_crtc_state *crtc_state,
 349                        struct drm_connector_state *conn_state)
 350 {
 351         struct nouveau_connector *nv_connector =
 352                 nouveau_connector(conn_state->connector);
 353         return nv50_outp_atomic_check_view(encoder, crtc_state, conn_state,
 354                                            nv_connector->native_mode);
 355 }
 356
 357 /******************************************************************************
 358  * DAC
 359  *****************************************************************************/
 360 static void
 361 nv50_dac_disable(struct drm_encoder *encoder)
 362 {
 363         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
 364         struct nv50_core *core = nv50_disp(encoder->dev)->core;
 365         if (nv_encoder->crtc)
 366                 core->func->dac->ctrl(core, nv_encoder->or, 0x00000000, NULL);
 367         nv_encoder->crtc = NULL;
 368         nv50_outp_release(nv_encoder);
 369 }
 370
 371 static void
 372 nv50_dac_enable(struct drm_encoder *encoder)
 373 {
 374         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
 375         struct nouveau_crtc *nv_crtc = nouveau_crtc(encoder->crtc);
 376         struct nv50_head_atom *asyh = nv50_head_atom(nv_crtc->base.state);
 377         struct nv50_core *core = nv50_disp(encoder->dev)->core;
 378
 379         nv50_outp_acquire(nv_encoder);
 380
 381         core->func->dac->ctrl(core, nv_encoder->or, 1 << nv_crtc->index, asyh);
 382         asyh->or.depth = 0;
 383
 384         nv_encoder->crtc = encoder->crtc;
 385 }
 386
 387 static enum drm_connector_status
 388 nv50_dac_detect(struct drm_encoder *encoder, struct drm_connector *connector)
 389 {
 390         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
 391         struct nv50_disp *disp = nv50_disp(encoder->dev);
 392         struct {
 393                 struct nv50_disp_mthd_v1 base;
 394                 struct nv50_disp_dac_load_v0 load;
 395         } args = {
 396                 .base.version = 1,
 397                 .base.method = NV50_DISP_MTHD_V1_DAC_LOAD,
 398                 .base.hasht  = nv_encoder->dcb->hasht,
 399                 .base.hashm  = nv_encoder->dcb->hashm,
 400         };
 401         int ret;
 402
 403         args.load.data = nouveau_drm(encoder->dev)->vbios.dactestval;
 404         if (args.load.data == 0)
 405                 args.load.data = 340;
 406
 407         ret = nvif_mthd(&disp->disp->object, 0, &args, sizeof(args));
 408         if (ret || !args.load.load)
 409                 return connector_status_disconnected;
 410
 411         return connector_status_connected;
 412 }
 413
 414 static const struct drm_encoder_helper_funcs
 415 nv50_dac_help = {
 416         .atomic_check = nv50_outp_atomic_check,
 417         .enable = nv50_dac_enable,
 418         .disable = nv50_dac_disable,
 419         .detect = nv50_dac_detect
 420 };
 421
 422 static void
 423 nv50_dac_destroy(struct drm_encoder *encoder)
 424 {
 425         drm_encoder_cleanup(encoder);
 426         kfree(encoder);
 427 }
 428
 429 static const struct drm_encoder_funcs
 430 nv50_dac_func = {
 431         .destroy = nv50_dac_destroy,
 432 };
 433
 434 static int
 435 nv50_dac_create(struct drm_connector *connector, struct dcb_output *dcbe)
 436 {
 437         struct nouveau_drm *drm = nouveau_drm(connector->dev);
 438         struct nvkm_i2c *i2c = nvxx_i2c(&drm->client.device);
 439         struct nvkm_i2c_bus *bus;
 440         struct nouveau_encoder *nv_encoder;
 441         struct drm_encoder *encoder;
 442         int type = DRM_MODE_ENCODER_DAC;
 443
 444         nv_encoder = kzalloc(sizeof(*nv_encoder), GFP_KERNEL);
 445         if (!nv_encoder)
 446                 return -ENOMEM;
 447         nv_encoder->dcb = dcbe;
 448
 449         bus = nvkm_i2c_bus_find(i2c, dcbe->i2c_index);
 450         if (bus)
 451                 nv_encoder->i2c = &bus->i2c;
 452
 453         encoder = to_drm_encoder(nv_encoder);
 454         encoder->possible_crtcs = dcbe->heads;
 455         encoder->possible_clones = 0;
 456         drm_encoder_init(connector->dev, encoder, &nv50_dac_func, type,
 457                          "dac-%04x-%04x", dcbe->hasht, dcbe->hashm);
 458         drm_encoder_helper_add(encoder, &nv50_dac_help);
 459
 460         drm_connector_attach_encoder(connector, encoder);
 461         return 0;
 462 }
 463
 464 /******************************************************************************
 465  * Audio
 466  *****************************************************************************/
 467 static void
 468 nv50_audio_disable(struct drm_encoder *encoder, struct nouveau_crtc *nv_crtc)
 469 {
 470         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
 471         struct nv50_disp *disp = nv50_disp(encoder->dev);
 472         struct {
 473                 struct nv50_disp_mthd_v1 base;
 474                 struct nv50_disp_sor_hda_eld_v0 eld;
 475         } args = {
 476                 .base.version = 1,
 477                 .base.method  = NV50_DISP_MTHD_V1_SOR_HDA_ELD,
 478                 .base.hasht   = nv_encoder->dcb->hasht,
 479                 .base.hashm   = (0xf0ff & nv_encoder->dcb->hashm) |
 480                                 (0x0100 << nv_crtc->index),
 481         };
 482
 483         nvif_mthd(&disp->disp->object, 0, &args, sizeof(args));
 484 }
 485
 486 static void
 487 nv50_audio_enable(struct drm_encoder *encoder, struct drm_display_mode *mode)
 488 {
 489         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
 490         struct nouveau_crtc *nv_crtc = nouveau_crtc(encoder->crtc);
 491         struct nouveau_connector *nv_connector;
 492         struct nv50_disp *disp = nv50_disp(encoder->dev);
 493         struct __packed {
 494                 struct {
 495                         struct nv50_disp_mthd_v1 mthd;
 496                         struct nv50_disp_sor_hda_eld_v0 eld;
 497                 } base;
 498                 u8 data[sizeof(nv_connector->base.eld)];
 499         } args = {
 500                 .base.mthd.version = 1,
 501                 .base.mthd.method  = NV50_DISP_MTHD_V1_SOR_HDA_ELD,
 502                 .base.mthd.hasht   = nv_encoder->dcb->hasht,
 503                 .base.mthd.hashm   = (0xf0ff & nv_encoder->dcb->hashm) |
 504                                      (0x0100 << nv_crtc->index),
 505         };
 506
 507         nv_connector = nouveau_encoder_connector_get(nv_encoder);
 508         if (!drm_detect_monitor_audio(nv_connector->edid))
 509                 return;
 510
 511         memcpy(args.data, nv_connector->base.eld, sizeof(args.data));
 512
 513         nvif_mthd(&disp->disp->object, 0, &args,
 514                   sizeof(args.base) + drm_eld_size(args.data));
 515 }
 516
 517 /******************************************************************************
 518  * HDMI
 519  *****************************************************************************/
 520 static void
 521 nv50_hdmi_disable(struct drm_encoder *encoder, struct nouveau_crtc *nv_crtc)
 522 {
 523         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
 524         struct nv50_disp *disp = nv50_disp(encoder->dev);
 525         struct {
 526                 struct nv50_disp_mthd_v1 base;
 527                 struct nv50_disp_sor_hdmi_pwr_v0 pwr;
 528         } args = {
 529                 .base.version = 1,
 530                 .base.method = NV50_DISP_MTHD_V1_SOR_HDMI_PWR,
 531                 .base.hasht  = nv_encoder->dcb->hasht,
 532                 .base.hashm  = (0xf0ff & nv_encoder->dcb->hashm) |
 533                                (0x0100 << nv_crtc->index),
 534         };
 535
 536         nvif_mthd(&disp->disp->object, 0, &args, sizeof(args));
 537 }
 538
 539 static void
 540 nv50_hdmi_enable(struct drm_encoder *encoder, struct drm_display_mode *mode)
 541 {
 542         struct nouveau_drm *drm = nouveau_drm(encoder->dev);
 543         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
 544         struct nouveau_crtc *nv_crtc = nouveau_crtc(encoder->crtc);
 545         struct nv50_disp *disp = nv50_disp(encoder->dev);
 546         struct {
 547                 struct nv50_disp_mthd_v1 base;
 548                 struct nv50_disp_sor_hdmi_pwr_v0 pwr;
 549                 u8 infoframes[2 * 17]; /* two frames, up to 17 bytes each */
 550         } args = {
 551                 .base.version = 1,
 552                 .base.method = NV50_DISP_MTHD_V1_SOR_HDMI_PWR,
 553                 .base.hasht  = nv_encoder->dcb->hasht,
 554                 .base.hashm  = (0xf0ff & nv_encoder->dcb->hashm) |
 555                                (0x0100 << nv_crtc->index),
 556                 .pwr.state = 1,
 557                 .pwr.rekey = 56, /* binary driver, and tegra, constant */
 558         };
 559         struct nouveau_connector *nv_connector;
 560         struct drm_hdmi_info *hdmi;
 561         u32 max_ac_packet;
 562         union hdmi_infoframe avi_frame;
 563         union hdmi_infoframe vendor_frame;
 564         bool scdc_supported, high_tmds_clock_ratio = false, scrambling = false;
 565         u8 config;
 566         int ret;
 567         int size;
 568
 569         nv_connector = nouveau_encoder_connector_get(nv_encoder);
 570         if (!drm_detect_hdmi_monitor(nv_connector->edid))
 571                 return;
 572
 573         hdmi = &nv_connector->base.display_info.hdmi;
 574         scdc_supported = hdmi->scdc.supported;
 575
 576         ret = drm_hdmi_avi_infoframe_from_display_mode(&avi_frame.avi, mode,
 577                                                        scdc_supported);
 578         if (!ret) {
 579                 /* We have an AVI InfoFrame, populate it to the display */
 580                 args.pwr.avi_infoframe_length
 581                         = hdmi_infoframe_pack(&avi_frame, args.infoframes, 17);
 582         }
 583
 584         ret = drm_hdmi_vendor_infoframe_from_display_mode(&vendor_frame.vendor.hdmi,
 585                                                           &nv_connector->base, mode);
 586         if (!ret) {
 587                 /* We have a Vendor InfoFrame, populate it to the display */
 588                 args.pwr.vendor_infoframe_length
 589                         = hdmi_infoframe_pack(&vendor_frame,
 590                                               args.infoframes
 591                                               + args.pwr.avi_infoframe_length,
 592                                               17);
 593         }
 594
 595         max_ac_packet  = mode->htotal - mode->hdisplay;
 596         max_ac_packet -= args.pwr.rekey;
 597         max_ac_packet -= 18; /* constant from tegra */
 598         args.pwr.max_ac_packet = max_ac_packet / 32;
 599
 600         if (hdmi->scdc.scrambling.supported) {
 601                 high_tmds_clock_ratio = mode->clock > 340000;
 602                 scrambling = high_tmds_clock_ratio ||
 603                         hdmi->scdc.scrambling.low_rates;
 604         }
 605
 606         args.pwr.scdc =
 607                 NV50_DISP_SOR_HDMI_PWR_V0_SCDC_SCRAMBLE * scrambling |
 608                 NV50_DISP_SOR_HDMI_PWR_V0_SCDC_DIV_BY_4 * high_tmds_clock_ratio;
 609
 610         size = sizeof(args.base)
 611                 + sizeof(args.pwr)
 612                 + args.pwr.avi_infoframe_length
 613                 + args.pwr.vendor_infoframe_length;
 614         nvif_mthd(&disp->disp->object, 0, &args, size);
 615
 616         nv50_audio_enable(encoder, mode);
 617
 618         /* If SCDC is supported by the downstream monitor, update
 619          * divider / scrambling settings to what we programmed above.
 620          */
 621         if (!hdmi->scdc.scrambling.supported)
 622                 return;
 623
 624         ret = drm_scdc_readb(nv_encoder->i2c, SCDC_TMDS_CONFIG, &config);
 625         if (ret < 0) {
 626                 NV_ERROR(drm, "Failure to read SCDC_TMDS_CONFIG: %d\n", ret);
 627                 return;
 628         }
 629         config &= ~(SCDC_TMDS_BIT_CLOCK_RATIO_BY_40 | SCDC_SCRAMBLING_ENABLE);
 630         config |= SCDC_TMDS_BIT_CLOCK_RATIO_BY_40 * high_tmds_clock_ratio;
 631         config |= SCDC_SCRAMBLING_ENABLE * scrambling;
 632         ret = drm_scdc_writeb(nv_encoder->i2c, SCDC_TMDS_CONFIG, config);
 633         if (ret < 0)
 634                 NV_ERROR(drm, "Failure to write SCDC_TMDS_CONFIG = 0x%02x: %d\n",
 635                          config, ret);
 636 }
 637
 638 /******************************************************************************
 639  * MST
 640  *****************************************************************************/
 641 #define nv50_mstm(p) container_of((p), struct nv50_mstm, mgr)
 642 #define nv50_mstc(p) container_of((p), struct nv50_mstc, connector)
 643 #define nv50_msto(p) container_of((p), struct nv50_msto, encoder)
 644
 645 struct nv50_mstm {
 646         struct nouveau_encoder *outp;
 647
 648         struct drm_dp_mst_topology_mgr mgr;
 649         struct nv50_msto *msto[4];
 650
 651         bool modified;
 652         bool disabled;
 653         int links;
 654 };
 655
 656 struct nv50_mstc {
 657         struct nv50_mstm *mstm;
 658         struct drm_dp_mst_port *port;
 659         struct drm_connector connector;
 660
 661         struct drm_display_mode *native;
 662         struct edid *edid;
 663
 664         int pbn;
 665 };
 666
 667 struct nv50_msto {
 668         struct drm_encoder encoder;
 669
 670         struct nv50_head *head;
 671         struct nv50_mstc *mstc;
 672         bool disabled;
 673 };
 674
 675 static struct drm_dp_payload *
 676 nv50_msto_payload(struct nv50_msto *msto)
 677 {
 678         struct nouveau_drm *drm = nouveau_drm(msto->encoder.dev);
 679         struct nv50_mstc *mstc = msto->mstc;
 680         struct nv50_mstm *mstm = mstc->mstm;
 681         int vcpi = mstc->port->vcpi.vcpi, i;
 682
 683         NV_ATOMIC(drm, "%s: vcpi %d\n", msto->encoder.name, vcpi);
 684         for (i = 0; i < mstm->mgr.max_payloads; i++) {
 685                 struct drm_dp_payload *payload = &mstm->mgr.payloads[i];
 686                 NV_ATOMIC(drm, "%s: %d: vcpi %d start 0x%02x slots 0x%02x\n",
 687                           mstm->outp->base.base.name, i, payload->vcpi,
 688                           payload->start_slot, payload->num_slots);
 689         }
 690
 691         for (i = 0; i < mstm->mgr.max_payloads; i++) {
 692                 struct drm_dp_payload *payload = &mstm->mgr.payloads[i];
 693                 if (payload->vcpi == vcpi)
 694                         return payload;
 695         }
 696
 697         return NULL;
 698 }
 699
 700 static void
 701 nv50_msto_cleanup(struct nv50_msto *msto)
 702 {
 703         struct nouveau_drm *drm = nouveau_drm(msto->encoder.dev);
 704         struct nv50_mstc *mstc = msto->mstc;
 705         struct nv50_mstm *mstm = mstc->mstm;
 706
 707         NV_ATOMIC(drm, "%s: msto cleanup\n", msto->encoder.name);
 708         if (mstc->port && mstc->port->vcpi.vcpi > 0 && !nv50_msto_payload(msto))
 709                 drm_dp_mst_deallocate_vcpi(&mstm->mgr, mstc->port);
 710         if (msto->disabled) {
 711                 msto->mstc = NULL;
 712                 msto->head = NULL;
 713                 msto->disabled = false;
 714         }
 715 }
 716
 717 static void
 718 nv50_msto_prepare(struct nv50_msto *msto)
 719 {
 720         struct nouveau_drm *drm = nouveau_drm(msto->encoder.dev);
 721         struct nv50_mstc *mstc = msto->mstc;
 722         struct nv50_mstm *mstm = mstc->mstm;
 723         struct {
 724                 struct nv50_disp_mthd_v1 base;
 725                 struct nv50_disp_sor_dp_mst_vcpi_v0 vcpi;
 726         } args = {
 727                 .base.version = 1,
 728                 .base.method = NV50_DISP_MTHD_V1_SOR_DP_MST_VCPI,
 729                 .base.hasht  = mstm->outp->dcb->hasht,
 730                 .base.hashm  = (0xf0ff & mstm->outp->dcb->hashm) |
 731                                (0x0100 << msto->head->base.index),
 732         };
 733
 734         NV_ATOMIC(drm, "%s: msto prepare\n", msto->encoder.name);
 735         if (mstc->port && mstc->port->vcpi.vcpi > 0) {
 736                 struct drm_dp_payload *payload = nv50_msto_payload(msto);
 737                 if (payload) {
 738                         args.vcpi.start_slot = payload->start_slot;
 739                         args.vcpi.num_slots = payload->num_slots;
 740                         args.vcpi.pbn = mstc->port->vcpi.pbn;
 741                         args.vcpi.aligned_pbn = mstc->port->vcpi.aligned_pbn;
 742                 }
 743         }
 744
 745         NV_ATOMIC(drm, "%s: %s: %02x %02x %04x %04x\n",
 746                   msto->encoder.name, msto->head->base.base.name,
 747                   args.vcpi.start_slot, args.vcpi.num_slots,
 748                   args.vcpi.pbn, args.vcpi.aligned_pbn);
 749         nvif_mthd(&drm->display->disp.object, 0, &args, sizeof(args));
 750 }
 751
 752 static int
 753 nv50_msto_atomic_check(struct drm_encoder *encoder,
 754                        struct drm_crtc_state *crtc_state,
 755                        struct drm_connector_state *conn_state)
 756 {
 757         struct nv50_mstc *mstc = nv50_mstc(conn_state->connector);
 758         struct nv50_mstm *mstm = mstc->mstm;
 759         int bpp = conn_state->connector->display_info.bpc * 3;
 760         int slots;
 761
 762         mstc->pbn = drm_dp_calc_pbn_mode(crtc_state->adjusted_mode.clock, bpp);
 763
 764         slots = drm_dp_find_vcpi_slots(&mstm->mgr, mstc->pbn);
 765         if (slots < 0)
 766                 return slots;
 767
 768         return nv50_outp_atomic_check_view(encoder, crtc_state, conn_state,
 769                                            mstc->native);
 770 }
 771
 772 static void
 773 nv50_msto_enable(struct drm_encoder *encoder)
 774 {
 775         struct nv50_head *head = nv50_head(encoder->crtc);
 776         struct nv50_msto *msto = nv50_msto(encoder);
 777         struct nv50_mstc *mstc = NULL;
 778         struct nv50_mstm *mstm = NULL;
 779         struct drm_connector *connector;
 780         struct drm_connector_list_iter conn_iter;
 781         u8 proto, depth;
 782         int slots;
 783         bool r;
 784
 785         drm_connector_list_iter_begin(encoder->dev, &conn_iter);
 786         drm_for_each_connector_iter(connector, &conn_iter) {
 787                 if (connector->state->best_encoder == &msto->encoder) {
 788                         mstc = nv50_mstc(connector);
 789                         mstm = mstc->mstm;
 790                         break;
 791                 }
 792         }
 793         drm_connector_list_iter_end(&conn_iter);
 794
 795         if (WARN_ON(!mstc))
 796                 return;
 797
 798         slots = drm_dp_find_vcpi_slots(&mstm->mgr, mstc->pbn);
 799         r = drm_dp_mst_allocate_vcpi(&mstm->mgr, mstc->port, mstc->pbn, slots);
 800         WARN_ON(!r);
 801
 802         if (!mstm->links++)
 803                 nv50_outp_acquire(mstm->outp);
 804
 805         if (mstm->outp->link & 1)
 806                 proto = 0x8;
 807         else
 808                 proto = 0x9;
 809
 810         switch (mstc->connector.display_info.bpc) {
 811         case  6: depth = 0x2; break;
 812         case  8: depth = 0x5; break;
 813         case 10:
 814         default: depth = 0x6; break;
 815         }
 816
 817         mstm->outp->update(mstm->outp, head->base.index,
 818                            nv50_head_atom(head->base.base.state), proto, depth);
 819
 820         msto->head = head;
 821         msto->mstc = mstc;
 822         mstm->modified = true;
 823 }
 824
 825 static void
 826 nv50_msto_disable(struct drm_encoder *encoder)
 827 {
 828         struct nv50_msto *msto = nv50_msto(encoder);
 829         struct nv50_mstc *mstc = msto->mstc;
 830         struct nv50_mstm *mstm = mstc->mstm;
 831
 832         if (mstc->port)
 833                 drm_dp_mst_reset_vcpi_slots(&mstm->mgr, mstc->port);
 834
 835         mstm->outp->update(mstm->outp, msto->head->base.index, NULL, 0, 0);
 836         mstm->modified = true;
 837         if (!--mstm->links)
 838                 mstm->disabled = true;
 839         msto->disabled = true;
 840 }
 841
 842 static const struct drm_encoder_helper_funcs
 843 nv50_msto_help = {
 844         .disable = nv50_msto_disable,
 845         .enable = nv50_msto_enable,
 846         .atomic_check = nv50_msto_atomic_check,
 847 };
 848
 849 static void
 850 nv50_msto_destroy(struct drm_encoder *encoder)
 851 {
 852         struct nv50_msto *msto = nv50_msto(encoder);
 853         drm_encoder_cleanup(&msto->encoder);
 854         kfree(msto);
 855 }
 856
 857 static const struct drm_encoder_funcs
 858 nv50_msto = {
 859         .destroy = nv50_msto_destroy,
 860 };
 861
 862 static int
 863 nv50_msto_new(struct drm_device *dev, u32 heads, const char *name, int id,
 864               struct nv50_msto **pmsto)
 865 {
 866         struct nv50_msto *msto;
 867         int ret;
 868
 869         if (!(msto = *pmsto = kzalloc(sizeof(*msto), GFP_KERNEL)))
 870                 return -ENOMEM;
 871
 872         ret = drm_encoder_init(dev, &msto->encoder, &nv50_msto,
 873                                DRM_MODE_ENCODER_DPMST, "%s-mst-%d", name, id);
 874         if (ret) {
 875                 kfree(*pmsto);
 876                 *pmsto = NULL;
 877                 return ret;
 878         }
 879
 880         drm_encoder_helper_add(&msto->encoder, &nv50_msto_help);
 881         msto->encoder.possible_crtcs = heads;
 882         return 0;
 883 }
 884
 885 static struct drm_encoder *
 886 nv50_mstc_atomic_best_encoder(struct drm_connector *connector,
 887                               struct drm_connector_state *connector_state)
 888 {
 889         struct nv50_head *head = nv50_head(connector_state->crtc);
 890         struct nv50_mstc *mstc = nv50_mstc(connector);
 891         if (mstc->port) {
 892                 struct nv50_mstm *mstm = mstc->mstm;
 893                 return &mstm->msto[head->base.index]->encoder;
 894         }
 895         return NULL;
 896 }
 897
 898 static struct drm_encoder *
 899 nv50_mstc_best_encoder(struct drm_connector *connector)
 900 {
 901         struct nv50_mstc *mstc = nv50_mstc(connector);
 902         if (mstc->port) {
 903                 struct nv50_mstm *mstm = mstc->mstm;
 904                 return &mstm->msto[0]->encoder;
 905         }
 906         return NULL;
 907 }
 908
 909 static enum drm_mode_status
 910 nv50_mstc_mode_valid(struct drm_connector *connector,
 911                      struct drm_display_mode *mode)
 912 {
 913         return MODE_OK;
 914 }
 915
 916 static int
 917 nv50_mstc_get_modes(struct drm_connector *connector)
 918 {
 919         struct nv50_mstc *mstc = nv50_mstc(connector);
 920         int ret = 0;
 921
 922         mstc->edid = drm_dp_mst_get_edid(&mstc->connector, mstc->port->mgr, mstc->port);
 923         drm_connector_update_edid_property(&mstc->connector, mstc->edid);
 924         if (mstc->edid)
 925                 ret = drm_add_edid_modes(&mstc->connector, mstc->edid);
 926
 927         if (!mstc->connector.display_info.bpc)
 928                 mstc->connector.display_info.bpc = 8;
 929
 930         if (mstc->native)
 931                 drm_mode_destroy(mstc->connector.dev, mstc->native);
 932         mstc->native = nouveau_conn_native_mode(&mstc->connector);
 933         return ret;
 934 }
 935
 936 static const struct drm_connector_helper_funcs
 937 nv50_mstc_help = {
 938         .get_modes = nv50_mstc_get_modes,
 939         .mode_valid = nv50_mstc_mode_valid,
 940         .best_encoder = nv50_mstc_best_encoder,
 941         .atomic_best_encoder = nv50_mstc_atomic_best_encoder,
 942 };
 943
 944 static enum drm_connector_status
 945 nv50_mstc_detect(struct drm_connector *connector, bool force)
 946 {
 947         struct nv50_mstc *mstc = nv50_mstc(connector);
 948         if (!mstc->port)
 949                 return connector_status_disconnected;
 950         return drm_dp_mst_detect_port(connector, mstc->port->mgr, mstc->port);
 951 }
 952
 953 static void
 954 nv50_mstc_destroy(struct drm_connector *connector)
 955 {
 956         struct nv50_mstc *mstc = nv50_mstc(connector);
 957         drm_connector_cleanup(&mstc->connector);
 958         kfree(mstc);
 959 }
 960
 961 static const struct drm_connector_funcs
 962 nv50_mstc = {
 963         .reset = nouveau_conn_reset,
 964         .detect = nv50_mstc_detect,
 965         .fill_modes = drm_helper_probe_single_connector_modes,
 966         .destroy = nv50_mstc_destroy,
 967         .atomic_duplicate_state = nouveau_conn_atomic_duplicate_state,
 968         .atomic_destroy_state = nouveau_conn_atomic_destroy_state,
 969         .atomic_set_property = nouveau_conn_atomic_set_property,
 970         .atomic_get_property = nouveau_conn_atomic_get_property,
 971 };
 972
 973 static int
 974 nv50_mstc_new(struct nv50_mstm *mstm, struct drm_dp_mst_port *port,
 975               const char *path, struct nv50_mstc **pmstc)
 976 {
 977         struct drm_device *dev = mstm->outp->base.base.dev;
 978         struct nv50_mstc *mstc;
 979         int ret, i;
 980
 981         if (!(mstc = *pmstc = kzalloc(sizeof(*mstc), GFP_KERNEL)))
 982                 return -ENOMEM;
 983         mstc->mstm = mstm;
 984         mstc->port = port;
 985
 986         ret = drm_connector_init(dev, &mstc->connector, &nv50_mstc,
 987                                  DRM_MODE_CONNECTOR_DisplayPort);
 988         if (ret) {
 989                 kfree(*pmstc);
 990                 *pmstc = NULL;
 991                 return ret;
 992         }
 993
 994         drm_connector_helper_add(&mstc->connector, &nv50_mstc_help);
 995
 996         mstc->connector.funcs->reset(&mstc->connector);
 997         nouveau_conn_attach_properties(&mstc->connector);
 998
 999         for (i = 0; i < ARRAY_SIZE(mstm->msto) && mstm->msto[i]; i++)
1000                 drm_connector_attach_encoder(&mstc->connector, &mstm->msto[i]->encoder);
1001
1002         drm_object_attach_property(&mstc->connector.base, dev->mode_config.path_property, 0);
1003         drm_object_attach_property(&mstc->connector.base, dev->mode_config.tile_property, 0);
1004         drm_connector_set_path_property(&mstc->connector, path);
1005         return 0;
1006 }
1007
1008 static void
1009 nv50_mstm_cleanup(struct nv50_mstm *mstm)
1010 {
1011         struct nouveau_drm *drm = nouveau_drm(mstm->outp->base.base.dev);
1012         struct drm_encoder *encoder;
1013         int ret;
1014
1015         NV_ATOMIC(drm, "%s: mstm cleanup\n", mstm->outp->base.base.name);
1016         ret = drm_dp_check_act_status(&mstm->mgr);
1017
1018         ret = drm_dp_update_payload_part2(&mstm->mgr);
1019
1020         drm_for_each_encoder(encoder, mstm->outp->base.base.dev) {
1021                 if (encoder->encoder_type == DRM_MODE_ENCODER_DPMST) {
1022                         struct nv50_msto *msto = nv50_msto(encoder);
1023                         struct nv50_mstc *mstc = msto->mstc;
1024                         if (mstc && mstc->mstm == mstm)
1025                                 nv50_msto_cleanup(msto);
1026                 }
1027         }
1028
1029         mstm->modified = false;
1030 }
1031
1032 static void
1033 nv50_mstm_prepare(struct nv50_mstm *mstm)
1034 {
1035         struct nouveau_drm *drm = nouveau_drm(mstm->outp->base.base.dev);
1036         struct drm_encoder *encoder;
1037         int ret;
1038
1039         NV_ATOMIC(drm, "%s: mstm prepare\n", mstm->outp->base.base.name);
1040         ret = drm_dp_update_payload_part1(&mstm->mgr);
1041
1042         drm_for_each_encoder(encoder, mstm->outp->base.base.dev) {
1043                 if (encoder->encoder_type == DRM_MODE_ENCODER_DPMST) {
1044                         struct nv50_msto *msto = nv50_msto(encoder);
1045                         struct nv50_mstc *mstc = msto->mstc;
1046                         if (mstc && mstc->mstm == mstm)
1047                                 nv50_msto_prepare(msto);
1048                 }
1049         }
1050
1051         if (mstm->disabled) {
1052                 if (!mstm->links)
1053                         nv50_outp_release(mstm->outp);
1054                 mstm->disabled = false;
1055         }
1056 }
1057
1058 static void
1059 nv50_mstm_hotplug(struct drm_dp_mst_topology_mgr *mgr)
1060 {
1061         struct nv50_mstm *mstm = nv50_mstm(mgr);
1062         drm_kms_helper_hotplug_event(mstm->outp->base.base.dev);
1063 }
1064
1065 static void
1066 nv50_mstm_destroy_connector(struct drm_dp_mst_topology_mgr *mgr,
1067                             struct drm_connector *connector)
1068 {
1069         struct nouveau_drm *drm = nouveau_drm(connector->dev);
1070         struct nv50_mstc *mstc = nv50_mstc(connector);
1071
1072         drm_connector_unregister(&mstc->connector);
1073
1074         drm_fb_helper_remove_one_connector(&drm->fbcon->helper, &mstc->connector);
1075
1076         drm_modeset_lock(&drm->dev->mode_config.connection_mutex, NULL);
1077         mstc->port = NULL;
1078         drm_modeset_unlock(&drm->dev->mode_config.connection_mutex);
1079
1080         drm_connector_put(&mstc->connector);
1081 }
1082
1083 static void
1084 nv50_mstm_register_connector(struct drm_connector *connector)
1085 {
1086         struct nouveau_drm *drm = nouveau_drm(connector->dev);
1087
1088         drm_fb_helper_add_one_connector(&drm->fbcon->helper, connector);
1089
1090         drm_connector_register(connector);
1091 }
1092
1093 static struct drm_connector *
1094 nv50_mstm_add_connector(struct drm_dp_mst_topology_mgr *mgr,
1095                         struct drm_dp_mst_port *port, const char *path)
1096 {
1097         struct nv50_mstm *mstm = nv50_mstm(mgr);
1098         struct nv50_mstc *mstc;
1099         int ret;
1100
1101         ret = nv50_mstc_new(mstm, port, path, &mstc);
1102         if (ret) {
1103                 if (mstc)
1104                         mstc->connector.funcs->destroy(&mstc->connector);
1105                 return NULL;
1106         }
1107
1108         return &mstc->connector;
1109 }
1110
1111 static const struct drm_dp_mst_topology_cbs
1112 nv50_mstm = {
1113         .add_connector = nv50_mstm_add_connector,
1114         .register_connector = nv50_mstm_register_connector,
1115         .destroy_connector = nv50_mstm_destroy_connector,
1116         .hotplug = nv50_mstm_hotplug,
1117 };
1118
1119 void
1120 nv50_mstm_service(struct nv50_mstm *mstm)
1121 {
1122         struct drm_dp_aux *aux = mstm ? mstm->mgr.aux : NULL;
1123         bool handled = true;
1124         int ret;
1125         u8 esi[8] = {};
1126
1127         if (!aux)
1128                 return;
1129
1130         while (handled) {
1131                 ret = drm_dp_dpcd_read(aux, DP_SINK_COUNT_ESI, esi, 8);
1132                 if (ret != 8) {
1133                         drm_dp_mst_topology_mgr_set_mst(&mstm->mgr, false);
1134                         return;
1135                 }
1136
1137                 drm_dp_mst_hpd_irq(&mstm->mgr, esi, &handled);
1138                 if (!handled)
1139                         break;
1140
1141                 drm_dp_dpcd_write(aux, DP_SINK_COUNT_ESI + 1, &esi[1], 3);
1142         }
1143 }
1144
1145 void
1146 nv50_mstm_remove(struct nv50_mstm *mstm)
1147 {
1148         if (mstm)
1149                 drm_dp_mst_topology_mgr_set_mst(&mstm->mgr, false);
1150 }
1151
1152 static int
1153 nv50_mstm_enable(struct nv50_mstm *mstm, u8 dpcd, int state)
1154 {
1155         struct nouveau_encoder *outp = mstm->outp;
1156         struct {
1157                 struct nv50_disp_mthd_v1 base;
1158                 struct nv50_disp_sor_dp_mst_link_v0 mst;
1159         } args = {
1160                 .base.version = 1,
1161                 .base.method = NV50_DISP_MTHD_V1_SOR_DP_MST_LINK,
1162                 .base.hasht = outp->dcb->hasht,
1163                 .base.hashm = outp->dcb->hashm,
1164                 .mst.state = state,
1165         };
1166         struct nouveau_drm *drm = nouveau_drm(outp->base.base.dev);
1167         struct nvif_object *disp = &drm->display->disp.object;
1168         int ret;
1169
1170         if (dpcd >= 0x12) {
1171                 /* Even if we're enabling MST, start with disabling the
1172                  * branching unit to clear any sink-side MST topology state
1173                  * that wasn't set by us
1174                  */
1175                 ret = drm_dp_dpcd_writeb(mstm->mgr.aux, DP_MSTM_CTRL, 0);
1176                 if (ret < 0)
1177                         return ret;
1178
1179                 if (state) {
1180                         /* Now, start initializing */
1181                         ret = drm_dp_dpcd_writeb(mstm->mgr.aux, DP_MSTM_CTRL,
1182                                                  DP_MST_EN);
1183                         if (ret < 0)
1184                                 return ret;
1185                 }
1186         }
1187
1188         return nvif_mthd(disp, 0, &args, sizeof(args));
1189 }
1190
1191 int
1192 nv50_mstm_detect(struct nv50_mstm *mstm, u8 dpcd[8], int allow)
1193 {
1194         struct drm_dp_aux *aux;
1195         int ret;
1196         bool old_state, new_state;
1197         u8 mstm_ctrl;
1198
1199         if (!mstm)
1200                 return 0;
1201
1202         mutex_lock(&mstm->mgr.lock);
1203
1204         old_state = mstm->mgr.mst_state;
1205         new_state = old_state;
1206         aux = mstm->mgr.aux;
1207
1208         if (old_state) {
1209                 /* Just check that the MST hub is still as we expect it */
1210                 ret = drm_dp_dpcd_readb(aux, DP_MSTM_CTRL, &mstm_ctrl);
1211                 if (ret < 0 || !(mstm_ctrl & DP_MST_EN)) {
1212                         DRM_DEBUG_KMS("Hub gone, disabling MST topology\n");
1213                         new_state = false;
1214                 }
1215         } else if (dpcd[0] >= 0x12) {
1216                 ret = drm_dp_dpcd_readb(aux, DP_MSTM_CAP, &dpcd[1]);
1217                 if (ret < 0)
1218                         goto probe_error;
1219
1220                 if (!(dpcd[1] & DP_MST_CAP))
1221                         dpcd[0] = 0x11;
1222                 else
1223                         new_state = allow;
1224         }
1225
1226         if (new_state == old_state) {
1227                 mutex_unlock(&mstm->mgr.lock);
1228                 return new_state;
1229         }
1230
1231         ret = nv50_mstm_enable(mstm, dpcd[0], new_state);
1232         if (ret)
1233                 goto probe_error;
1234
1235         mutex_unlock(&mstm->mgr.lock);
1236
1237         ret = drm_dp_mst_topology_mgr_set_mst(&mstm->mgr, new_state);
1238         if (ret)
1239                 return nv50_mstm_enable(mstm, dpcd[0], 0);
1240
1241         return new_state;
1242
1243 probe_error:
1244         mutex_unlock(&mstm->mgr.lock);
1245         return ret;
1246 }
1247
1248 static void
1249 nv50_mstm_fini(struct nv50_mstm *mstm)
1250 {
1251         if (mstm && mstm->mgr.mst_state)
1252                 drm_dp_mst_topology_mgr_suspend(&mstm->mgr);
1253 }
1254
1255 static void
1256 nv50_mstm_init(struct nv50_mstm *mstm)
1257 {
1258         if (mstm && mstm->mgr.mst_state)
1259                 drm_dp_mst_topology_mgr_resume(&mstm->mgr);
1260 }
1261
1262 static void
1263 nv50_mstm_del(struct nv50_mstm **pmstm)
1264 {
1265         struct nv50_mstm *mstm = *pmstm;
1266         if (mstm) {
1267                 kfree(*pmstm);
1268                 *pmstm = NULL;
1269         }
1270 }
1271
1272 static int
1273 nv50_mstm_new(struct nouveau_encoder *outp, struct drm_dp_aux *aux, int aux_max,
1274               int conn_base_id, struct nv50_mstm **pmstm)
1275 {
1276         const int max_payloads = hweight8(outp->dcb->heads);
1277         struct drm_device *dev = outp->base.base.dev;
1278         struct nv50_mstm *mstm;
1279         int ret, i;
1280         u8 dpcd;
1281
1282         /* This is a workaround for some monitors not functioning
1283          * correctly in MST mode on initial module load.  I think
1284          * some bad interaction with the VBIOS may be responsible.
1285          *
1286          * A good ol' off and on again seems to work here ;)
1287          */
1288         ret = drm_dp_dpcd_readb(aux, DP_DPCD_REV, &dpcd);
1289         if (ret >= 0 && dpcd >= 0x12)
1290                 drm_dp_dpcd_writeb(aux, DP_MSTM_CTRL, 0);
1291
1292         if (!(mstm = *pmstm = kzalloc(sizeof(*mstm), GFP_KERNEL)))
1293                 return -ENOMEM;
1294         mstm->outp = outp;
1295         mstm->mgr.cbs = &nv50_mstm;
1296
1297         ret = drm_dp_mst_topology_mgr_init(&mstm->mgr, dev, aux, aux_max,
1298                                            max_payloads, conn_base_id);
1299         if (ret)
1300                 return ret;
1301
1302         for (i = 0; i < max_payloads; i++) {
1303                 ret = nv50_msto_new(dev, outp->dcb->heads, outp->base.base.name,
1304                                     i, &mstm->msto[i]);
1305                 if (ret)
1306                         return ret;
1307         }
1308
1309         return 0;
1310 }
1311
1312 /******************************************************************************
1313  * SOR
1314  *****************************************************************************/
1315 static void
1316 nv50_sor_update(struct nouveau_encoder *nv_encoder, u8 head,
1317                 struct nv50_head_atom *asyh, u8 proto, u8 depth)
1318 {
1319         struct nv50_disp *disp = nv50_disp(nv_encoder->base.base.dev);
1320         struct nv50_core *core = disp->core;
1321
1322         if (!asyh) {
1323                 nv_encoder->ctrl &= ~BIT(head);
1324                 if (!(nv_encoder->ctrl & 0x0000000f))
1325                         nv_encoder->ctrl = 0;
1326         } else {
1327                 nv_encoder->ctrl |= proto << 8;
1328                 nv_encoder->ctrl |= BIT(head);
1329                 asyh->or.depth = depth;
1330         }
1331
1332         core->func->sor->ctrl(core, nv_encoder->or, nv_encoder->ctrl, asyh);
1333 }
1334
1335 static void
1336 nv50_sor_disable(struct drm_encoder *encoder)
1337 {
1338         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
1339         struct nouveau_crtc *nv_crtc = nouveau_crtc(nv_encoder->crtc);
1340
1341         nv_encoder->crtc = NULL;
1342
1343         if (nv_crtc) {
1344                 struct nvkm_i2c_aux *aux = nv_encoder->aux;
1345                 u8 pwr;
1346
1347                 if (aux) {
1348                         int ret = nvkm_rdaux(aux, DP_SET_POWER, &pwr, 1);
1349                         if (ret == 0) {
1350                                 pwr &= ~DP_SET_POWER_MASK;
1351                                 pwr |=  DP_SET_POWER_D3;
1352                                 nvkm_wraux(aux, DP_SET_POWER, &pwr, 1);
1353                         }
1354                 }
1355
1356                 nv_encoder->update(nv_encoder, nv_crtc->index, NULL, 0, 0);
1357                 nv50_audio_disable(encoder, nv_crtc);
1358                 nv50_hdmi_disable(&nv_encoder->base.base, nv_crtc);
1359                 nv50_outp_release(nv_encoder);
1360         }
1361 }
1362
1363 static void
1364 nv50_sor_enable(struct drm_encoder *encoder)
1365 {
1366         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
1367         struct nouveau_crtc *nv_crtc = nouveau_crtc(encoder->crtc);
1368         struct nv50_head_atom *asyh = nv50_head_atom(nv_crtc->base.state);
1369         struct drm_display_mode *mode = &asyh->state.adjusted_mode;
1370         struct {
1371                 struct nv50_disp_mthd_v1 base;
1372                 struct nv50_disp_sor_lvds_script_v0 lvds;
1373         } lvds = {
1374                 .base.version = 1,
1375                 .base.method  = NV50_DISP_MTHD_V1_SOR_LVDS_SCRIPT,
1376                 .base.hasht   = nv_encoder->dcb->hasht,
1377                 .base.hashm   = nv_encoder->dcb->hashm,
1378         };
1379         struct nv50_disp *disp = nv50_disp(encoder->dev);
1380         struct drm_device *dev = encoder->dev;
1381         struct nouveau_drm *drm = nouveau_drm(dev);
1382         struct nouveau_connector *nv_connector;
1383         struct nvbios *bios = &drm->vbios;
1384         u8 proto = 0xf;
1385         u8 depth = 0x0;
1386
1387         nv_connector = nouveau_encoder_connector_get(nv_encoder);
1388         nv_encoder->crtc = encoder->crtc;
1389         nv50_outp_acquire(nv_encoder);
1390
1391         switch (nv_encoder->dcb->type) {
1392         case DCB_OUTPUT_TMDS:
1393                 if (nv_encoder->link & 1) {
1394                         proto = 0x1;
1395                         /* Only enable dual-link if:
1396                          *  - Need to (i.e. rate > 165MHz)
1397                          *  - DCB says we can
1398                          *  - Not an HDMI monitor, since there's no dual-link
1399                          *    on HDMI.
1400                          */
1401                         if (mode->clock >= 165000 &&
1402                             nv_encoder->dcb->duallink_possible &&
1403                             !drm_detect_hdmi_monitor(nv_connector->edid))
1404                                 proto |= 0x4;
1405                 } else {
1406                         proto = 0x2;
1407                 }
1408
1409                 nv50_hdmi_enable(&nv_encoder->base.base, mode);
1410                 break;
1411         case DCB_OUTPUT_LVDS:
1412                 proto = 0x0;
1413
1414                 if (bios->fp_no_ddc) {
1415                         if (bios->fp.dual_link)
1416                                 lvds.lvds.script |= 0x0100;
1417                         if (bios->fp.if_is_24bit)
1418                                 lvds.lvds.script |= 0x0200;
1419                 } else {
1420                         if (nv_connector->type == DCB_CONNECTOR_LVDS_SPWG) {
1421                                 if (((u8 *)nv_connector->edid)[121] == 2)
1422                                         lvds.lvds.script |= 0x0100;
1423                         } else
1424                         if (mode->clock >= bios->fp.duallink_transition_clk) {
1425                                 lvds.lvds.script |= 0x0100;
1426                         }
1427
1428                         if (lvds.lvds.script & 0x0100) {
1429                                 if (bios->fp.strapless_is_24bit & 2)
1430                                         lvds.lvds.script |= 0x0200;
1431                         } else {
1432                                 if (bios->fp.strapless_is_24bit & 1)
1433                                         lvds.lvds.script |= 0x0200;
1434                         }
1435
1436                         if (nv_connector->base.display_info.bpc == 8)
1437                                 lvds.lvds.script |= 0x0200;
1438                 }
1439
1440                 nvif_mthd(&disp->disp->object, 0, &lvds, sizeof(lvds));
1441                 break;
1442         case DCB_OUTPUT_DP:
1443                 if (nv_connector->base.display_info.bpc == 6)
1444                         depth = 0x2;
1445                 else
1446                 if (nv_connector->base.display_info.bpc == 8)
1447                         depth = 0x5;
1448                 else
1449                         depth = 0x6;
1450
1451                 if (nv_encoder->link & 1)
1452                         proto = 0x8;
1453                 else
1454                         proto = 0x9;
1455
1456                 nv50_audio_enable(encoder, mode);
1457                 break;
1458         default:
1459                 BUG();
1460                 break;
1461         }
1462
1463         nv_encoder->update(nv_encoder, nv_crtc->index, asyh, proto, depth);
1464 }
1465
1466 static const struct drm_encoder_helper_funcs
1467 nv50_sor_help = {
1468         .atomic_check = nv50_outp_atomic_check,
1469         .enable = nv50_sor_enable,
1470         .disable = nv50_sor_disable,
1471 };
1472
1473 static void
1474 nv50_sor_destroy(struct drm_encoder *encoder)
1475 {
1476         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
1477         nv50_mstm_del(&nv_encoder->dp.mstm);
1478         drm_encoder_cleanup(encoder);
1479         kfree(encoder);
1480 }
1481
1482 static const struct drm_encoder_funcs
1483 nv50_sor_func = {
1484         .destroy = nv50_sor_destroy,
1485 };
1486
1487 static int
1488 nv50_sor_create(struct drm_connector *connector, struct dcb_output *dcbe)
1489 {
1490         struct nouveau_connector *nv_connector = nouveau_connector(connector);
1491         struct nouveau_drm *drm = nouveau_drm(connector->dev);
1492         struct nvkm_bios *bios = nvxx_bios(&drm->client.device);
1493         struct nvkm_i2c *i2c = nvxx_i2c(&drm->client.device);
1494         struct nouveau_encoder *nv_encoder;
1495         struct drm_encoder *encoder;
1496         u8 ver, hdr, cnt, len;
1497         u32 data;
1498         int type, ret;
1499
1500         switch (dcbe->type) {
1501         case DCB_OUTPUT_LVDS: type = DRM_MODE_ENCODER_LVDS; break;
1502         case DCB_OUTPUT_TMDS:
1503         case DCB_OUTPUT_DP:
1504         default:
1505                 type = DRM_MODE_ENCODER_TMDS;
1506                 break;
1507         }
1508
1509         nv_encoder = kzalloc(sizeof(*nv_encoder), GFP_KERNEL);
1510         if (!nv_encoder)
1511                 return -ENOMEM;
1512         nv_encoder->dcb = dcbe;
1513         nv_encoder->update = nv50_sor_update;
1514
1515         encoder = to_drm_encoder(nv_encoder);
1516         encoder->possible_crtcs = dcbe->heads;
1517         encoder->possible_clones = 0;
1518         drm_encoder_init(connector->dev, encoder, &nv50_sor_func, type,
1519                          "sor-%04x-%04x", dcbe->hasht, dcbe->hashm);
1520         drm_encoder_helper_add(encoder, &nv50_sor_help);
1521
1522         drm_connector_attach_encoder(connector, encoder);
1523
1524         if (dcbe->type == DCB_OUTPUT_DP) {
1525                 struct nv50_disp *disp = nv50_disp(encoder->dev);
1526                 struct nvkm_i2c_aux *aux =
1527                         nvkm_i2c_aux_find(i2c, dcbe->i2c_index);
1528                 if (aux) {
1529                         if (disp->disp->object.oclass < GF110_DISP) {
1530                                 /* HW has no support for address-only
1531                                  * transactions, so we're required to
1532                                  * use custom I2C-over-AUX code.
1533                                  */
1534                                 nv_encoder->i2c = &aux->i2c;
1535                         } else {
1536                                 nv_encoder->i2c = &nv_connector->aux.ddc;
1537                         }
1538                         nv_encoder->aux = aux;
1539                 }
1540
1541                 if ((data = nvbios_dp_table(bios, &ver, &hdr, &cnt, &len)) &&
1542                     ver >= 0x40 && (nvbios_rd08(bios, data + 0x08) & 0x04)) {
1543                         ret = nv50_mstm_new(nv_encoder, &nv_connector->aux, 16,
1544                                             nv_connector->base.base.id,
1545                                             &nv_encoder->dp.mstm);
1546                         if (ret)
1547                                 return ret;
1548                 }
1549         } else {
1550                 struct nvkm_i2c_bus *bus =
1551                         nvkm_i2c_bus_find(i2c, dcbe->i2c_index);
1552                 if (bus)
1553                         nv_encoder->i2c = &bus->i2c;
1554         }
1555
1556         return 0;
1557 }
1558
1559 /******************************************************************************
1560  * PIOR
1561  *****************************************************************************/
1562 static int
1563 nv50_pior_atomic_check(struct drm_encoder *encoder,
1564                        struct drm_crtc_state *crtc_state,
1565                        struct drm_connector_state *conn_state)
1566 {
1567         int ret = nv50_outp_atomic_check(encoder, crtc_state, conn_state);
1568         if (ret)
1569                 return ret;
1570         crtc_state->adjusted_mode.clock *= 2;
1571         return 0;
1572 }
1573
1574 static void
1575 nv50_pior_disable(struct drm_encoder *encoder)
1576 {
1577         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
1578         struct nv50_core *core = nv50_disp(encoder->dev)->core;
1579         if (nv_encoder->crtc)
1580                 core->func->pior->ctrl(core, nv_encoder->or, 0x00000000, NULL);
1581         nv_encoder->crtc = NULL;
1582         nv50_outp_release(nv_encoder);
1583 }
1584
1585 static void
1586 nv50_pior_enable(struct drm_encoder *encoder)
1587 {
1588         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
1589         struct nouveau_crtc *nv_crtc = nouveau_crtc(encoder->crtc);
1590         struct nouveau_connector *nv_connector;
1591         struct nv50_head_atom *asyh = nv50_head_atom(nv_crtc->base.state);
1592         struct nv50_core *core = nv50_disp(encoder->dev)->core;
1593         u8 owner = 1 << nv_crtc->index;
1594         u8 proto;
1595
1596         nv50_outp_acquire(nv_encoder);
1597
1598         nv_connector = nouveau_encoder_connector_get(nv_encoder);
1599         switch (nv_connector->base.display_info.bpc) {
1600         case 10: asyh->or.depth = 0x6; break;
1601         case  8: asyh->or.depth = 0x5; break;
1602         case  6: asyh->or.depth = 0x2; break;
1603         default: asyh->or.depth = 0x0; break;
1604         }
1605
1606         switch (nv_encoder->dcb->type) {
1607         case DCB_OUTPUT_TMDS:
1608         case DCB_OUTPUT_DP:
1609                 proto = 0x0;
1610                 break;
1611         default:
1612                 BUG();
1613                 break;
1614         }
1615
1616         core->func->pior->ctrl(core, nv_encoder->or, (proto << 8) | owner, asyh);
1617         nv_encoder->crtc = encoder->crtc;
1618 }
1619
1620 static const struct drm_encoder_helper_funcs
1621 nv50_pior_help = {
1622         .atomic_check = nv50_pior_atomic_check,
1623         .enable = nv50_pior_enable,
1624         .disable = nv50_pior_disable,
1625 };
1626
1627 static void
1628 nv50_pior_destroy(struct drm_encoder *encoder)
1629 {
1630         drm_encoder_cleanup(encoder);
1631         kfree(encoder);
1632 }
1633
1634 static const struct drm_encoder_funcs
1635 nv50_pior_func = {
1636         .destroy = nv50_pior_destroy,
1637 };
1638
1639 static int
1640 nv50_pior_create(struct drm_connector *connector, struct dcb_output *dcbe)
1641 {
1642         struct nouveau_drm *drm = nouveau_drm(connector->dev);
1643         struct nvkm_i2c *i2c = nvxx_i2c(&drm->client.device);
1644         struct nvkm_i2c_bus *bus = NULL;
1645         struct nvkm_i2c_aux *aux = NULL;
1646         struct i2c_adapter *ddc;
1647         struct nouveau_encoder *nv_encoder;
1648         struct drm_encoder *encoder;
1649         int type;
1650
1651         switch (dcbe->type) {
1652         case DCB_OUTPUT_TMDS:
1653                 bus  = nvkm_i2c_bus_find(i2c, NVKM_I2C_BUS_EXT(dcbe->extdev));
1654                 ddc  = bus ? &bus->i2c : NULL;
1655                 type = DRM_MODE_ENCODER_TMDS;
1656                 break;
1657         case DCB_OUTPUT_DP:
1658                 aux  = nvkm_i2c_aux_find(i2c, NVKM_I2C_AUX_EXT(dcbe->extdev));
1659                 ddc  = aux ? &aux->i2c : NULL;
1660                 type = DRM_MODE_ENCODER_TMDS;
1661                 break;
1662         default:
1663                 return -ENODEV;
1664         }
1665
1666         nv_encoder = kzalloc(sizeof(*nv_encoder), GFP_KERNEL);
1667         if (!nv_encoder)
1668                 return -ENOMEM;
1669         nv_encoder->dcb = dcbe;
1670         nv_encoder->i2c = ddc;
1671         nv_encoder->aux = aux;
1672
1673         encoder = to_drm_encoder(nv_encoder);
1674         encoder->possible_crtcs = dcbe->heads;
1675         encoder->possible_clones = 0;
1676         drm_encoder_init(connector->dev, encoder, &nv50_pior_func, type,
1677                          "pior-%04x-%04x", dcbe->hasht, dcbe->hashm);
1678         drm_encoder_helper_add(encoder, &nv50_pior_help);
1679
1680         drm_connector_attach_encoder(connector, encoder);
1681         return 0;
1682 }
1683
1684 /******************************************************************************
1685  * Atomic
1686  *****************************************************************************/
1687
1688 static void
1689 nv50_disp_atomic_commit_core(struct drm_atomic_state *state, u32 *interlock)
1690 {
1691         struct nouveau_drm *drm = nouveau_drm(state->dev);
1692         struct nv50_disp *disp = nv50_disp(drm->dev);
1693         struct nv50_core *core = disp->core;
1694         struct nv50_mstm *mstm;
1695         struct drm_encoder *encoder;
1696
1697         NV_ATOMIC(drm, "commit core %08x\n", interlock[NV50_DISP_INTERLOCK_BASE]);
1698
1699         drm_for_each_encoder(encoder, drm->dev) {
1700                 if (encoder->encoder_type != DRM_MODE_ENCODER_DPMST) {
1701                         mstm = nouveau_encoder(encoder)->dp.mstm;
1702                         if (mstm && mstm->modified)
1703                                 nv50_mstm_prepare(mstm);
1704                 }
1705         }
1706
1707         core->func->ntfy_init(disp->sync, NV50_DISP_CORE_NTFY);
1708         core->func->update(core, interlock, true);
1709         if (core->func->ntfy_wait_done(disp->sync, NV50_DISP_CORE_NTFY,
1710                                        disp->core->chan.base.device))
1711                 NV_ERROR(drm, "core notifier timeout\n");
1712
1713         drm_for_each_encoder(encoder, drm->dev) {
1714                 if (encoder->encoder_type != DRM_MODE_ENCODER_DPMST) {
1715                         mstm = nouveau_encoder(encoder)->dp.mstm;
1716                         if (mstm && mstm->modified)
1717                                 nv50_mstm_cleanup(mstm);
1718                 }
1719         }
1720 }
1721
1722 static void
1723 nv50_disp_atomic_commit_wndw(struct drm_atomic_state *state, u32 *interlock)
1724 {
1725         struct drm_plane_state *new_plane_state;
1726         struct drm_plane *plane;
1727         int i;
1728
1729         for_each_new_plane_in_state(state, plane, new_plane_state, i) {
1730                 struct nv50_wndw *wndw = nv50_wndw(plane);
1731                 if (interlock[wndw->interlock.type] & wndw->interlock.data) {
1732                         if (wndw->func->update)
1733                                 wndw->func->update(wndw, interlock);
1734                 }
1735         }
1736 }
1737
1738 static void
1739 nv50_disp_atomic_commit_tail(struct drm_atomic_state *state)
1740 {
1741         struct drm_device *dev = state->dev;
1742         struct drm_crtc_state *new_crtc_state, *old_crtc_state;
1743         struct drm_crtc *crtc;
1744         struct drm_plane_state *new_plane_state;
1745         struct drm_plane *plane;
1746         struct nouveau_drm *drm = nouveau_drm(dev);
1747         struct nv50_disp *disp = nv50_disp(dev);
1748         struct nv50_atom *atom = nv50_atom(state);
1749         struct nv50_outp_atom *outp, *outt;
1750         u32 interlock[NV50_DISP_INTERLOCK__SIZE] = {};
1751         int i;
1752
1753         NV_ATOMIC(drm, "commit %d %d\n", atom->lock_core, atom->flush_disable);
1754         drm_atomic_helper_wait_for_fences(dev, state, false);
1755         drm_atomic_helper_wait_for_dependencies(state);
1756         drm_atomic_helper_update_legacy_modeset_state(dev, state);
1757
1758         if (atom->lock_core)
1759                 mutex_lock(&disp->mutex);
1760
1761         /* Disable head(s). */
1762         for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
1763                 struct nv50_head_atom *asyh = nv50_head_atom(new_crtc_state);
1764                 struct nv50_head *head = nv50_head(crtc);
1765
1766                 NV_ATOMIC(drm, "%s: clr %04x (set %04x)\n", crtc->name,
1767                           asyh->clr.mask, asyh->set.mask);
1768                 if (old_crtc_state->active && !new_crtc_state->active)
1769                         drm_crtc_vblank_off(crtc);
1770
1771                 if (asyh->clr.mask) {
1772                         nv50_head_flush_clr(head, asyh, atom->flush_disable);
1773                         interlock[NV50_DISP_INTERLOCK_CORE] |= 1;
1774                 }
1775         }
1776
1777         /* Disable plane(s). */
1778         for_each_new_plane_in_state(state, plane, new_plane_state, i) {
1779                 struct nv50_wndw_atom *asyw = nv50_wndw_atom(new_plane_state);
1780                 struct nv50_wndw *wndw = nv50_wndw(plane);
1781
1782                 NV_ATOMIC(drm, "%s: clr %02x (set %02x)\n", plane->name,
1783                           asyw->clr.mask, asyw->set.mask);
1784                 if (!asyw->clr.mask)
1785                         continue;
1786
1787                 nv50_wndw_flush_clr(wndw, interlock, atom->flush_disable, asyw);
1788         }
1789
1790         /* Disable output path(s). */
1791         list_for_each_entry(outp, &atom->outp, head) {
1792                 const struct drm_encoder_helper_funcs *help;
1793                 struct drm_encoder *encoder;
1794
1795                 encoder = outp->encoder;
1796                 help = encoder->helper_private;
1797
1798                 NV_ATOMIC(drm, "%s: clr %02x (set %02x)\n", encoder->name,
1799                           outp->clr.mask, outp->set.mask);
1800
1801                 if (outp->clr.mask) {
1802                         help->disable(encoder);
1803                         interlock[NV50_DISP_INTERLOCK_CORE] |= 1;
1804                         if (outp->flush_disable) {
1805                                 nv50_disp_atomic_commit_wndw(state, interlock);
1806                                 nv50_disp_atomic_commit_core(state, interlock);
1807                                 memset(interlock, 0x00, sizeof(interlock));
1808                         }
1809                 }
1810         }
1811
1812         /* Flush disable. */
1813         if (interlock[NV50_DISP_INTERLOCK_CORE]) {
1814                 if (atom->flush_disable) {
1815                         nv50_disp_atomic_commit_wndw(state, interlock);
1816                         nv50_disp_atomic_commit_core(state, interlock);
1817                         memset(interlock, 0x00, sizeof(interlock));
1818                 }
1819         }
1820
1821         /* Update output path(s). */
1822         list_for_each_entry_safe(outp, outt, &atom->outp, head) {
1823                 const struct drm_encoder_helper_funcs *help;
1824                 struct drm_encoder *encoder;
1825
1826                 encoder = outp->encoder;
1827                 help = encoder->helper_private;
1828
1829                 NV_ATOMIC(drm, "%s: set %02x (clr %02x)\n", encoder->name,
1830                           outp->set.mask, outp->clr.mask);
1831
1832                 if (outp->set.mask) {
1833                         help->enable(encoder);
1834                         interlock[NV50_DISP_INTERLOCK_CORE] = 1;
1835                 }
1836
1837                 list_del(&outp->head);
1838                 kfree(outp);
1839         }
1840
1841         /* Update head(s). */
1842         for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
1843                 struct nv50_head_atom *asyh = nv50_head_atom(new_crtc_state);
1844                 struct nv50_head *head = nv50_head(crtc);
1845
1846                 NV_ATOMIC(drm, "%s: set %04x (clr %04x)\n", crtc->name,
1847                           asyh->set.mask, asyh->clr.mask);
1848
1849                 if (asyh->set.mask) {
1850                         nv50_head_flush_set(head, asyh);
1851                         interlock[NV50_DISP_INTERLOCK_CORE] = 1;
1852                 }
1853
1854                 if (new_crtc_state->active) {
1855                         if (!old_crtc_state->active)
1856                                 drm_crtc_vblank_on(crtc);
1857                         if (new_crtc_state->event)
1858                                 drm_crtc_vblank_get(crtc);
1859                 }
1860         }
1861
1862         /* Update plane(s). */
1863         for_each_new_plane_in_state(state, plane, new_plane_state, i) {
1864                 struct nv50_wndw_atom *asyw = nv50_wndw_atom(new_plane_state);
1865                 struct nv50_wndw *wndw = nv50_wndw(plane);
1866
1867                 NV_ATOMIC(drm, "%s: set %02x (clr %02x)\n", plane->name,
1868                           asyw->set.mask, asyw->clr.mask);
1869                 if ( !asyw->set.mask &&
1870                     (!asyw->clr.mask || atom->flush_disable))
1871                         continue;
1872
1873                 nv50_wndw_flush_set(wndw, interlock, asyw);
1874         }
1875
1876         /* Flush update. */
1877         nv50_disp_atomic_commit_wndw(state, interlock);
1878
1879         if (interlock[NV50_DISP_INTERLOCK_CORE]) {
1880                 if (interlock[NV50_DISP_INTERLOCK_BASE] ||
1881                     interlock[NV50_DISP_INTERLOCK_OVLY] ||
1882                     interlock[NV50_DISP_INTERLOCK_WNDW] ||
1883                     !atom->state.legacy_cursor_update)
1884                         nv50_disp_atomic_commit_core(state, interlock);
1885                 else
1886                         disp->core->func->update(disp->core, interlock, false);
1887         }
1888
1889         if (atom->lock_core)
1890                 mutex_unlock(&disp->mutex);
1891
1892         /* Wait for HW to signal completion. */
1893         for_each_new_plane_in_state(state, plane, new_plane_state, i) {
1894                 struct nv50_wndw_atom *asyw = nv50_wndw_atom(new_plane_state);
1895                 struct nv50_wndw *wndw = nv50_wndw(plane);
1896                 int ret = nv50_wndw_wait_armed(wndw, asyw);
1897                 if (ret)
1898                         NV_ERROR(drm, "%s: timeout\n", plane->name);
1899         }
1900
1901         for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
1902                 if (new_crtc_state->event) {
1903                         unsigned long flags;
1904                         /* Get correct count/ts if racing with vblank irq */
1905                         if (new_crtc_state->active)
1906                                 drm_crtc_accurate_vblank_count(crtc);
1907                         spin_lock_irqsave(&crtc->dev->event_lock, flags);
1908                         drm_crtc_send_vblank_event(crtc, new_crtc_state->event);
1909                         spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
1910
1911                         new_crtc_state->event = NULL;
1912                         if (new_crtc_state->active)
1913                                 drm_crtc_vblank_put(crtc);
1914                 }
1915         }
1916
1917         drm_atomic_helper_commit_hw_done(state);
1918         drm_atomic_helper_cleanup_planes(dev, state);
1919         drm_atomic_helper_commit_cleanup_done(state);
1920         drm_atomic_state_put(state);
1921 }
1922
1923 static void
1924 nv50_disp_atomic_commit_work(struct work_struct *work)
1925 {
1926         struct drm_atomic_state *state =
1927                 container_of(work, typeof(*state), commit_work);
1928         nv50_disp_atomic_commit_tail(state);
1929 }
1930
1931 static int
1932 nv50_disp_atomic_commit(struct drm_device *dev,
1933                         struct drm_atomic_state *state, bool nonblock)
1934 {
1935         struct nouveau_drm *drm = nouveau_drm(dev);
1936         struct drm_plane_state *new_plane_state;
1937         struct drm_plane *plane;
1938         struct drm_crtc *crtc;
1939         bool active = false;
1940         int ret, i;
1941
1942         ret = pm_runtime_get_sync(dev->dev);
1943         if (ret < 0 && ret != -EACCES)
1944                 return ret;
1945
1946         ret = drm_atomic_helper_setup_commit(state, nonblock);
1947         if (ret)
1948                 goto done;
1949
1950         INIT_WORK(&state->commit_work, nv50_disp_atomic_commit_work);
1951
1952         ret = drm_atomic_helper_prepare_planes(dev, state);
1953         if (ret)
1954                 goto done;
1955
1956         if (!nonblock) {
1957                 ret = drm_atomic_helper_wait_for_fences(dev, state, true);
1958                 if (ret)
1959                         goto err_cleanup;
1960         }
1961
1962         ret = drm_atomic_helper_swap_state(state, true);
1963         if (ret)
1964                 goto err_cleanup;
1965
1966         for_each_new_plane_in_state(state, plane, new_plane_state, i) {
1967                 struct nv50_wndw_atom *asyw = nv50_wndw_atom(new_plane_state);
1968                 struct nv50_wndw *wndw = nv50_wndw(plane);
1969
1970                 if (asyw->set.image)
1971                         nv50_wndw_ntfy_enable(wndw, asyw);
1972         }
1973
1974         drm_atomic_state_get(state);
1975
1976         if (nonblock)
1977                 queue_work(system_unbound_wq, &state->commit_work);
1978         else
1979                 nv50_disp_atomic_commit_tail(state);
1980
1981         drm_for_each_crtc(crtc, dev) {
1982                 if (crtc->state->active) {
1983                         if (!drm->have_disp_power_ref) {
1984                                 drm->have_disp_power_ref = true;
1985                                 return 0;
1986                         }
1987                         active = true;
1988                         break;
1989                 }
1990         }
1991
1992         if (!active && drm->have_disp_power_ref) {
1993                 pm_runtime_put_autosuspend(dev->dev);
1994                 drm->have_disp_power_ref = false;
1995         }
1996
1997 err_cleanup:
1998         if (ret)
1999                 drm_atomic_helper_cleanup_planes(dev, state);
2000 done:
2001         pm_runtime_put_autosuspend(dev->dev);
2002         return ret;
2003 }
2004
2005 static struct nv50_outp_atom *
2006 nv50_disp_outp_atomic_add(struct nv50_atom *atom, struct drm_encoder *encoder)
2007 {
2008         struct nv50_outp_atom *outp;
2009
2010         list_for_each_entry(outp, &atom->outp, head) {
2011                 if (outp->encoder == encoder)
2012                         return outp;
2013         }
2014
2015         outp = kzalloc(sizeof(*outp), GFP_KERNEL);
2016         if (!outp)
2017                 return ERR_PTR(-ENOMEM);
2018
2019         list_add(&outp->head, &atom->outp);
2020         outp->encoder = encoder;
2021         return outp;
2022 }
2023
2024 static int
2025 nv50_disp_outp_atomic_check_clr(struct nv50_atom *atom,
2026                                 struct drm_connector_state *old_connector_state)
2027 {
2028         struct drm_encoder *encoder = old_connector_state->best_encoder;
2029         struct drm_crtc_state *old_crtc_state, *new_crtc_state;
2030         struct drm_crtc *crtc;
2031         struct nv50_outp_atom *outp;
2032
2033         if (!(crtc = old_connector_state->crtc))
2034                 return 0;
2035
2036         old_crtc_state = drm_atomic_get_old_crtc_state(&atom->state, crtc);
2037         new_crtc_state = drm_atomic_get_new_crtc_state(&atom->state, crtc);
2038         if (old_crtc_state->active && drm_atomic_crtc_needs_modeset(new_crtc_state)) {
2039                 outp = nv50_disp_outp_atomic_add(atom, encoder);
2040                 if (IS_ERR(outp))
2041                         return PTR_ERR(outp);
2042
2043                 if (outp->encoder->encoder_type == DRM_MODE_ENCODER_DPMST) {
2044                         outp->flush_disable = true;
2045                         atom->flush_disable = true;
2046                 }
2047                 outp->clr.ctrl = true;
2048                 atom->lock_core = true;
2049         }
2050
2051         return 0;
2052 }
2053
2054 static int
2055 nv50_disp_outp_atomic_check_set(struct nv50_atom *atom,
2056                                 struct drm_connector_state *connector_state)
2057 {
2058         struct drm_encoder *encoder = connector_state->best_encoder;
2059         struct drm_crtc_state *new_crtc_state;
2060         struct drm_crtc *crtc;
2061         struct nv50_outp_atom *outp;
2062
2063         if (!(crtc = connector_state->crtc))
2064                 return 0;
2065
2066         new_crtc_state = drm_atomic_get_new_crtc_state(&atom->state, crtc);
2067         if (new_crtc_state->active && drm_atomic_crtc_needs_modeset(new_crtc_state)) {
2068                 outp = nv50_disp_outp_atomic_add(atom, encoder);
2069                 if (IS_ERR(outp))
2070                         return PTR_ERR(outp);
2071
2072                 outp->set.ctrl = true;
2073                 atom->lock_core = true;
2074         }
2075
2076         return 0;
2077 }
2078
2079 static int
2080 nv50_disp_atomic_check(struct drm_device *dev, struct drm_atomic_state *state)
2081 {
2082         struct nv50_atom *atom = nv50_atom(state);
2083         struct drm_connector_state *old_connector_state, *new_connector_state;
2084         struct drm_connector *connector;
2085         struct drm_crtc_state *new_crtc_state;
2086         struct drm_crtc *crtc;
2087         int ret, i;
2088
2089         /* We need to handle colour management on a per-plane basis. */
2090         for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
2091                 if (new_crtc_state->color_mgmt_changed) {
2092                         ret = drm_atomic_add_affected_planes(state, crtc);
2093                         if (ret)
2094                                 return ret;
2095                 }
2096         }
2097
2098         ret = drm_atomic_helper_check(dev, state);
2099         if (ret)
2100                 return ret;
2101
2102         for_each_oldnew_connector_in_state(state, connector, old_connector_state, new_connector_state, i) {
2103                 ret = nv50_disp_outp_atomic_check_clr(atom, old_connector_state);
2104                 if (ret)
2105                         return ret;
2106
2107                 ret = nv50_disp_outp_atomic_check_set(atom, new_connector_state);
2108                 if (ret)
2109                         return ret;
2110         }
2111
2112         return 0;
2113 }
2114
2115 static void
2116 nv50_disp_atomic_state_clear(struct drm_atomic_state *state)
2117 {
2118         struct nv50_atom *atom = nv50_atom(state);
2119         struct nv50_outp_atom *outp, *outt;
2120
2121         list_for_each_entry_safe(outp, outt, &atom->outp, head) {
2122                 list_del(&outp->head);
2123                 kfree(outp);
2124         }
2125
2126         drm_atomic_state_default_clear(state);
2127 }
2128
2129 static void
2130 nv50_disp_atomic_state_free(struct drm_atomic_state *state)
2131 {
2132         struct nv50_atom *atom = nv50_atom(state);
2133         drm_atomic_state_default_release(&atom->state);
2134         kfree(atom);
2135 }
2136
2137 static struct drm_atomic_state *
2138 nv50_disp_atomic_state_alloc(struct drm_device *dev)
2139 {
2140         struct nv50_atom *atom;
2141         if (!(atom = kzalloc(sizeof(*atom), GFP_KERNEL)) ||
2142             drm_atomic_state_init(dev, &atom->state) < 0) {
2143                 kfree(atom);
2144                 return NULL;
2145         }
2146         INIT_LIST_HEAD(&atom->outp);
2147         return &atom->state;
2148 }
2149
2150 static const struct drm_mode_config_funcs
2151 nv50_disp_func = {
2152         .fb_create = nouveau_user_framebuffer_create,
2153         .output_poll_changed = nouveau_fbcon_output_poll_changed,
2154         .atomic_check = nv50_disp_atomic_check,
2155         .atomic_commit = nv50_disp_atomic_commit,
2156         .atomic_state_alloc = nv50_disp_atomic_state_alloc,
2157         .atomic_state_clear = nv50_disp_atomic_state_clear,
2158         .atomic_state_free = nv50_disp_atomic_state_free,
2159 };
2160
2161 /******************************************************************************
2162  * Init
2163  *****************************************************************************/
2164
2165 void
2166 nv50_display_fini(struct drm_device *dev)
2167 {
2168         struct nouveau_encoder *nv_encoder;
2169         struct drm_encoder *encoder;
2170         struct drm_plane *plane;
2171
2172         drm_for_each_plane(plane, dev) {
2173                 struct nv50_wndw *wndw = nv50_wndw(plane);
2174                 if (plane->funcs != &nv50_wndw)
2175                         continue;
2176                 nv50_wndw_fini(wndw);
2177         }
2178
2179         list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
2180                 if (encoder->encoder_type != DRM_MODE_ENCODER_DPMST) {
2181                         nv_encoder = nouveau_encoder(encoder);
2182                         nv50_mstm_fini(nv_encoder->dp.mstm);
2183                 }
2184         }
2185 }
2186
2187 int
2188 nv50_display_init(struct drm_device *dev)
2189 {
2190         struct nv50_core *core = nv50_disp(dev)->core;
2191         struct drm_encoder *encoder;
2192         struct drm_plane *plane;
2193
2194         core->func->init(core);
2195
2196         list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
2197                 if (encoder->encoder_type != DRM_MODE_ENCODER_DPMST) {
2198                         struct nouveau_encoder *nv_encoder =
2199                                 nouveau_encoder(encoder);
2200                         nv50_mstm_init(nv_encoder->dp.mstm);
2201                 }
2202         }
2203
2204         drm_for_each_plane(plane, dev) {
2205                 struct nv50_wndw *wndw = nv50_wndw(plane);
2206                 if (plane->funcs != &nv50_wndw)
2207                         continue;
2208                 nv50_wndw_init(wndw);
2209         }
2210
2211         return 0;
2212 }
2213
2214 void
2215 nv50_display_destroy(struct drm_device *dev)
2216 {
2217         struct nv50_disp *disp = nv50_disp(dev);
2218
2219         nv50_core_del(&disp->core);
2220
2221         nouveau_bo_unmap(disp->sync);
2222         if (disp->sync)
2223                 nouveau_bo_unpin(disp->sync);
2224         nouveau_bo_ref(NULL, &disp->sync);
2225
2226         nouveau_display(dev)->priv = NULL;
2227         kfree(disp);
2228 }
2229
2230 int
2231 nv50_display_create(struct drm_device *dev)
2232 {
2233         struct nvif_device *device = &nouveau_drm(dev)->client.device;
2234         struct nouveau_drm *drm = nouveau_drm(dev);
2235         struct dcb_table *dcb = &drm->vbios.dcb;
2236         struct drm_connector *connector, *tmp;
2237         struct nv50_disp *disp;
2238         struct dcb_output *dcbe;
2239         int crtcs, ret, i;
2240
2241         disp = kzalloc(sizeof(*disp), GFP_KERNEL);
2242         if (!disp)
2243                 return -ENOMEM;
2244
2245         mutex_init(&disp->mutex);
2246
2247         nouveau_display(dev)->priv = disp;
2248         nouveau_display(dev)->dtor = nv50_display_destroy;
2249         nouveau_display(dev)->init = nv50_display_init;
2250         nouveau_display(dev)->fini = nv50_display_fini;
2251         disp->disp = &nouveau_display(dev)->disp;
2252         dev->mode_config.funcs = &nv50_disp_func;
2253         dev->mode_config.quirk_addfb_prefer_xbgr_30bpp = true;
2254
2255         /* small shared memory area we use for notifiers and semaphores */
2256         ret = nouveau_bo_new(&drm->client, 4096, 0x1000, TTM_PL_FLAG_VRAM,
2257                              0, 0x0000, NULL, NULL, &disp->sync);
2258         if (!ret) {
2259                 ret = nouveau_bo_pin(disp->sync, TTM_PL_FLAG_VRAM, true);
2260                 if (!ret) {
2261                         ret = nouveau_bo_map(disp->sync);
2262                         if (ret)
2263                                 nouveau_bo_unpin(disp->sync);
2264                 }
2265                 if (ret)
2266                         nouveau_bo_ref(NULL, &disp->sync);
2267         }
2268
2269         if (ret)
2270                 goto out;
2271
2272         /* allocate master evo channel */
2273         ret = nv50_core_new(drm, &disp->core);
2274         if (ret)
2275                 goto out;
2276
2277         /* create crtc objects to represent the hw heads */
2278         if (disp->disp->object.oclass >= GV100_DISP)
2279                 crtcs = nvif_rd32(&device->object, 0x610060) & 0xff;
2280         else
2281         if (disp->disp->object.oclass >= GF110_DISP)
2282                 crtcs = nvif_rd32(&device->object, 0x612004) & 0xf;
2283         else
2284                 crtcs = 0x3;
2285
2286         for (i = 0; i < fls(crtcs); i++) {
2287                 if (!(crtcs & (1 << i)))
2288                         continue;
2289                 ret = nv50_head_create(dev, i);
2290                 if (ret)
2291                         goto out;
2292         }
2293
2294         /* create encoder/connector objects based on VBIOS DCB table */
2295         for (i = 0, dcbe = &dcb->entry[0]; i < dcb->entries; i++, dcbe++) {
2296                 connector = nouveau_connector_create(dev, dcbe->connector);
2297                 if (IS_ERR(connector))
2298                         continue;
2299
2300                 if (dcbe->location == DCB_LOC_ON_CHIP) {
2301                         switch (dcbe->type) {
2302                         case DCB_OUTPUT_TMDS:
2303                         case DCB_OUTPUT_LVDS:
2304                         case DCB_OUTPUT_DP:
2305                                 ret = nv50_sor_create(connector, dcbe);
2306                                 break;
2307                         case DCB_OUTPUT_ANALOG:
2308                                 ret = nv50_dac_create(connector, dcbe);
2309                                 break;
2310                         default:
2311                                 ret = -ENODEV;
2312                                 break;
2313                         }
2314                 } else {
2315                         ret = nv50_pior_create(connector, dcbe);
2316                 }
2317
2318                 if (ret) {
2319                         NV_WARN(drm, "failed to create encoder %d/%d/%d: %d\n",
2320                                      dcbe->location, dcbe->type,
2321                                      ffs(dcbe->or) - 1, ret);
2322                         ret = 0;
2323                 }
2324         }
2325
2326         /* cull any connectors we created that don't have an encoder */
2327         list_for_each_entry_safe(connector, tmp, &dev->mode_config.connector_list, head) {
2328                 if (connector->encoder_ids[0])
2329                         continue;
2330
2331                 NV_WARN(drm, "%s has no encoders, removing\n",
2332                         connector->name);
2333                 connector->funcs->destroy(connector);
2334         }
2335
2336         /* Disable vblank irqs aggressively for power-saving, safe on nv50+ */
2337         dev->vblank_disable_immediate = true;
2338
2339 out:
2340         if (ret)
2341                 nv50_display_destroy(dev);
2342         return ret;
2343 }