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
 892         return &mstc->mstm->msto[head->base.index]->encoder;
 893 }
 894
 895 static struct drm_encoder *
 896 nv50_mstc_best_encoder(struct drm_connector *connector)
 897 {
 898         struct nv50_mstc *mstc = nv50_mstc(connector);
 899
 900         return &mstc->mstm->msto[0]->encoder;
 901 }
 902
 903 static enum drm_mode_status
 904 nv50_mstc_mode_valid(struct drm_connector *connector,
 905                      struct drm_display_mode *mode)
 906 {
 907         return MODE_OK;
 908 }
 909
 910 static int
 911 nv50_mstc_get_modes(struct drm_connector *connector)
 912 {
 913         struct nv50_mstc *mstc = nv50_mstc(connector);
 914         int ret = 0;
 915
 916         mstc->edid = drm_dp_mst_get_edid(&mstc->connector, mstc->port->mgr, mstc->port);
 917         drm_connector_update_edid_property(&mstc->connector, mstc->edid);
 918         if (mstc->edid)
 919                 ret = drm_add_edid_modes(&mstc->connector, mstc->edid);
 920
 921         if (!mstc->connector.display_info.bpc)
 922                 mstc->connector.display_info.bpc = 8;
 923
 924         if (mstc->native)
 925                 drm_mode_destroy(mstc->connector.dev, mstc->native);
 926         mstc->native = nouveau_conn_native_mode(&mstc->connector);
 927         return ret;
 928 }
 929
 930 static const struct drm_connector_helper_funcs
 931 nv50_mstc_help = {
 932         .get_modes = nv50_mstc_get_modes,
 933         .mode_valid = nv50_mstc_mode_valid,
 934         .best_encoder = nv50_mstc_best_encoder,
 935         .atomic_best_encoder = nv50_mstc_atomic_best_encoder,
 936 };
 937
 938 static enum drm_connector_status
 939 nv50_mstc_detect(struct drm_connector *connector, bool force)
 940 {
 941         struct nv50_mstc *mstc = nv50_mstc(connector);
 942         enum drm_connector_status conn_status;
 943         int ret;
 944
 945         if (!mstc->port)
 946                 return connector_status_disconnected;
 947
 948         ret = pm_runtime_get_sync(connector->dev->dev);
 949         if (ret < 0 && ret != -EACCES)
 950                 return connector_status_disconnected;
 951
 952         conn_status = drm_dp_mst_detect_port(connector, mstc->port->mgr,
 953                                              mstc->port);
 954
 955         pm_runtime_mark_last_busy(connector->dev->dev);
 956         pm_runtime_put_autosuspend(connector->dev->dev);
 957         return conn_status;
 958 }
 959
 960 static void
 961 nv50_mstc_destroy(struct drm_connector *connector)
 962 {
 963         struct nv50_mstc *mstc = nv50_mstc(connector);
 964         drm_connector_cleanup(&mstc->connector);
 965         kfree(mstc);
 966 }
 967
 968 static const struct drm_connector_funcs
 969 nv50_mstc = {
 970         .reset = nouveau_conn_reset,
 971         .detect = nv50_mstc_detect,
 972         .fill_modes = drm_helper_probe_single_connector_modes,
 973         .destroy = nv50_mstc_destroy,
 974         .atomic_duplicate_state = nouveau_conn_atomic_duplicate_state,
 975         .atomic_destroy_state = nouveau_conn_atomic_destroy_state,
 976         .atomic_set_property = nouveau_conn_atomic_set_property,
 977         .atomic_get_property = nouveau_conn_atomic_get_property,
 978 };
 979
 980 static int
 981 nv50_mstc_new(struct nv50_mstm *mstm, struct drm_dp_mst_port *port,
 982               const char *path, struct nv50_mstc **pmstc)
 983 {
 984         struct drm_device *dev = mstm->outp->base.base.dev;
 985         struct nv50_mstc *mstc;
 986         int ret, i;
 987
 988         if (!(mstc = *pmstc = kzalloc(sizeof(*mstc), GFP_KERNEL)))
 989                 return -ENOMEM;
 990         mstc->mstm = mstm;
 991         mstc->port = port;
 992
 993         ret = drm_connector_init(dev, &mstc->connector, &nv50_mstc,
 994                                  DRM_MODE_CONNECTOR_DisplayPort);
 995         if (ret) {
 996                 kfree(*pmstc);
 997                 *pmstc = NULL;
 998                 return ret;
 999         }
1000
1001         drm_connector_helper_add(&mstc->connector, &nv50_mstc_help);
1002
1003         mstc->connector.funcs->reset(&mstc->connector);
1004         nouveau_conn_attach_properties(&mstc->connector);
1005
1006         for (i = 0; i < ARRAY_SIZE(mstm->msto) && mstm->msto[i]; i++)
1007                 drm_connector_attach_encoder(&mstc->connector, &mstm->msto[i]->encoder);
1008
1009         drm_object_attach_property(&mstc->connector.base, dev->mode_config.path_property, 0);
1010         drm_object_attach_property(&mstc->connector.base, dev->mode_config.tile_property, 0);
1011         drm_connector_set_path_property(&mstc->connector, path);
1012         return 0;
1013 }
1014
1015 static void
1016 nv50_mstm_cleanup(struct nv50_mstm *mstm)
1017 {
1018         struct nouveau_drm *drm = nouveau_drm(mstm->outp->base.base.dev);
1019         struct drm_encoder *encoder;
1020         int ret;
1021
1022         NV_ATOMIC(drm, "%s: mstm cleanup\n", mstm->outp->base.base.name);
1023         ret = drm_dp_check_act_status(&mstm->mgr);
1024
1025         ret = drm_dp_update_payload_part2(&mstm->mgr);
1026
1027         drm_for_each_encoder(encoder, mstm->outp->base.base.dev) {
1028                 if (encoder->encoder_type == DRM_MODE_ENCODER_DPMST) {
1029                         struct nv50_msto *msto = nv50_msto(encoder);
1030                         struct nv50_mstc *mstc = msto->mstc;
1031                         if (mstc && mstc->mstm == mstm)
1032                                 nv50_msto_cleanup(msto);
1033                 }
1034         }
1035
1036         mstm->modified = false;
1037 }
1038
1039 static void
1040 nv50_mstm_prepare(struct nv50_mstm *mstm)
1041 {
1042         struct nouveau_drm *drm = nouveau_drm(mstm->outp->base.base.dev);
1043         struct drm_encoder *encoder;
1044         int ret;
1045
1046         NV_ATOMIC(drm, "%s: mstm prepare\n", mstm->outp->base.base.name);
1047         ret = drm_dp_update_payload_part1(&mstm->mgr);
1048
1049         drm_for_each_encoder(encoder, mstm->outp->base.base.dev) {
1050                 if (encoder->encoder_type == DRM_MODE_ENCODER_DPMST) {
1051                         struct nv50_msto *msto = nv50_msto(encoder);
1052                         struct nv50_mstc *mstc = msto->mstc;
1053                         if (mstc && mstc->mstm == mstm)
1054                                 nv50_msto_prepare(msto);
1055                 }
1056         }
1057
1058         if (mstm->disabled) {
1059                 if (!mstm->links)
1060                         nv50_outp_release(mstm->outp);
1061                 mstm->disabled = false;
1062         }
1063 }
1064
1065 static void
1066 nv50_mstm_hotplug(struct drm_dp_mst_topology_mgr *mgr)
1067 {
1068         struct nv50_mstm *mstm = nv50_mstm(mgr);
1069         drm_kms_helper_hotplug_event(mstm->outp->base.base.dev);
1070 }
1071
1072 static void
1073 nv50_mstm_destroy_connector(struct drm_dp_mst_topology_mgr *mgr,
1074                             struct drm_connector *connector)
1075 {
1076         struct nouveau_drm *drm = nouveau_drm(connector->dev);
1077         struct nv50_mstc *mstc = nv50_mstc(connector);
1078
1079         drm_connector_unregister(&mstc->connector);
1080
1081         drm_fb_helper_remove_one_connector(&drm->fbcon->helper, &mstc->connector);
1082
1083         drm_modeset_lock(&drm->dev->mode_config.connection_mutex, NULL);
1084         mstc->port = NULL;
1085         drm_modeset_unlock(&drm->dev->mode_config.connection_mutex);
1086
1087         drm_connector_put(&mstc->connector);
1088 }
1089
1090 static void
1091 nv50_mstm_register_connector(struct drm_connector *connector)
1092 {
1093         struct nouveau_drm *drm = nouveau_drm(connector->dev);
1094
1095         drm_fb_helper_add_one_connector(&drm->fbcon->helper, connector);
1096
1097         drm_connector_register(connector);
1098 }
1099
1100 static struct drm_connector *
1101 nv50_mstm_add_connector(struct drm_dp_mst_topology_mgr *mgr,
1102                         struct drm_dp_mst_port *port, const char *path)
1103 {
1104         struct nv50_mstm *mstm = nv50_mstm(mgr);
1105         struct nv50_mstc *mstc;
1106         int ret;
1107
1108         ret = nv50_mstc_new(mstm, port, path, &mstc);
1109         if (ret) {
1110                 if (mstc)
1111                         mstc->connector.funcs->destroy(&mstc->connector);
1112                 return NULL;
1113         }
1114
1115         return &mstc->connector;
1116 }
1117
1118 static const struct drm_dp_mst_topology_cbs
1119 nv50_mstm = {
1120         .add_connector = nv50_mstm_add_connector,
1121         .register_connector = nv50_mstm_register_connector,
1122         .destroy_connector = nv50_mstm_destroy_connector,
1123         .hotplug = nv50_mstm_hotplug,
1124 };
1125
1126 void
1127 nv50_mstm_service(struct nv50_mstm *mstm)
1128 {
1129         struct drm_dp_aux *aux = mstm ? mstm->mgr.aux : NULL;
1130         bool handled = true;
1131         int ret;
1132         u8 esi[8] = {};
1133
1134         if (!aux)
1135                 return;
1136
1137         while (handled) {
1138                 ret = drm_dp_dpcd_read(aux, DP_SINK_COUNT_ESI, esi, 8);
1139                 if (ret != 8) {
1140                         drm_dp_mst_topology_mgr_set_mst(&mstm->mgr, false);
1141                         return;
1142                 }
1143
1144                 drm_dp_mst_hpd_irq(&mstm->mgr, esi, &handled);
1145                 if (!handled)
1146                         break;
1147
1148                 drm_dp_dpcd_write(aux, DP_SINK_COUNT_ESI + 1, &esi[1], 3);
1149         }
1150 }
1151
1152 void
1153 nv50_mstm_remove(struct nv50_mstm *mstm)
1154 {
1155         if (mstm)
1156                 drm_dp_mst_topology_mgr_set_mst(&mstm->mgr, false);
1157 }
1158
1159 static int
1160 nv50_mstm_enable(struct nv50_mstm *mstm, u8 dpcd, int state)
1161 {
1162         struct nouveau_encoder *outp = mstm->outp;
1163         struct {
1164                 struct nv50_disp_mthd_v1 base;
1165                 struct nv50_disp_sor_dp_mst_link_v0 mst;
1166         } args = {
1167                 .base.version = 1,
1168                 .base.method = NV50_DISP_MTHD_V1_SOR_DP_MST_LINK,
1169                 .base.hasht = outp->dcb->hasht,
1170                 .base.hashm = outp->dcb->hashm,
1171                 .mst.state = state,
1172         };
1173         struct nouveau_drm *drm = nouveau_drm(outp->base.base.dev);
1174         struct nvif_object *disp = &drm->display->disp.object;
1175         int ret;
1176
1177         if (dpcd >= 0x12) {
1178                 /* Even if we're enabling MST, start with disabling the
1179                  * branching unit to clear any sink-side MST topology state
1180                  * that wasn't set by us
1181                  */
1182                 ret = drm_dp_dpcd_writeb(mstm->mgr.aux, DP_MSTM_CTRL, 0);
1183                 if (ret < 0)
1184                         return ret;
1185
1186                 if (state) {
1187                         /* Now, start initializing */
1188                         ret = drm_dp_dpcd_writeb(mstm->mgr.aux, DP_MSTM_CTRL,
1189                                                  DP_MST_EN);
1190                         if (ret < 0)
1191                                 return ret;
1192                 }
1193         }
1194
1195         return nvif_mthd(disp, 0, &args, sizeof(args));
1196 }
1197
1198 int
1199 nv50_mstm_detect(struct nv50_mstm *mstm, u8 dpcd[8], int allow)
1200 {
1201         struct drm_dp_aux *aux;
1202         int ret;
1203         bool old_state, new_state;
1204         u8 mstm_ctrl;
1205
1206         if (!mstm)
1207                 return 0;
1208
1209         mutex_lock(&mstm->mgr.lock);
1210
1211         old_state = mstm->mgr.mst_state;
1212         new_state = old_state;
1213         aux = mstm->mgr.aux;
1214
1215         if (old_state) {
1216                 /* Just check that the MST hub is still as we expect it */
1217                 ret = drm_dp_dpcd_readb(aux, DP_MSTM_CTRL, &mstm_ctrl);
1218                 if (ret < 0 || !(mstm_ctrl & DP_MST_EN)) {
1219                         DRM_DEBUG_KMS("Hub gone, disabling MST topology\n");
1220                         new_state = false;
1221                 }
1222         } else if (dpcd[0] >= 0x12) {
1223                 ret = drm_dp_dpcd_readb(aux, DP_MSTM_CAP, &dpcd[1]);
1224                 if (ret < 0)
1225                         goto probe_error;
1226
1227                 if (!(dpcd[1] & DP_MST_CAP))
1228                         dpcd[0] = 0x11;
1229                 else
1230                         new_state = allow;
1231         }
1232
1233         if (new_state == old_state) {
1234                 mutex_unlock(&mstm->mgr.lock);
1235                 return new_state;
1236         }
1237
1238         ret = nv50_mstm_enable(mstm, dpcd[0], new_state);
1239         if (ret)
1240                 goto probe_error;
1241
1242         mutex_unlock(&mstm->mgr.lock);
1243
1244         ret = drm_dp_mst_topology_mgr_set_mst(&mstm->mgr, new_state);
1245         if (ret)
1246                 return nv50_mstm_enable(mstm, dpcd[0], 0);
1247
1248         return new_state;
1249
1250 probe_error:
1251         mutex_unlock(&mstm->mgr.lock);
1252         return ret;
1253 }
1254
1255 static void
1256 nv50_mstm_fini(struct nv50_mstm *mstm)
1257 {
1258         if (mstm && mstm->mgr.mst_state)
1259                 drm_dp_mst_topology_mgr_suspend(&mstm->mgr);
1260 }
1261
1262 static void
1263 nv50_mstm_init(struct nv50_mstm *mstm)
1264 {
1265         if (mstm && mstm->mgr.mst_state)
1266                 drm_dp_mst_topology_mgr_resume(&mstm->mgr);
1267 }
1268
1269 static void
1270 nv50_mstm_del(struct nv50_mstm **pmstm)
1271 {
1272         struct nv50_mstm *mstm = *pmstm;
1273         if (mstm) {
1274                 drm_dp_mst_topology_mgr_destroy(&mstm->mgr);
1275                 kfree(*pmstm);
1276                 *pmstm = NULL;
1277         }
1278 }
1279
1280 static int
1281 nv50_mstm_new(struct nouveau_encoder *outp, struct drm_dp_aux *aux, int aux_max,
1282               int conn_base_id, struct nv50_mstm **pmstm)
1283 {
1284         const int max_payloads = hweight8(outp->dcb->heads);
1285         struct drm_device *dev = outp->base.base.dev;
1286         struct nv50_mstm *mstm;
1287         int ret, i;
1288         u8 dpcd;
1289
1290         /* This is a workaround for some monitors not functioning
1291          * correctly in MST mode on initial module load.  I think
1292          * some bad interaction with the VBIOS may be responsible.
1293          *
1294          * A good ol' off and on again seems to work here ;)
1295          */
1296         ret = drm_dp_dpcd_readb(aux, DP_DPCD_REV, &dpcd);
1297         if (ret >= 0 && dpcd >= 0x12)
1298                 drm_dp_dpcd_writeb(aux, DP_MSTM_CTRL, 0);
1299
1300         if (!(mstm = *pmstm = kzalloc(sizeof(*mstm), GFP_KERNEL)))
1301                 return -ENOMEM;
1302         mstm->outp = outp;
1303         mstm->mgr.cbs = &nv50_mstm;
1304
1305         ret = drm_dp_mst_topology_mgr_init(&mstm->mgr, dev, aux, aux_max,
1306                                            max_payloads, conn_base_id);
1307         if (ret)
1308                 return ret;
1309
1310         for (i = 0; i < max_payloads; i++) {
1311                 ret = nv50_msto_new(dev, outp->dcb->heads, outp->base.base.name,
1312                                     i, &mstm->msto[i]);
1313                 if (ret)
1314                         return ret;
1315         }
1316
1317         return 0;
1318 }
1319
1320 /******************************************************************************
1321  * SOR
1322  *****************************************************************************/
1323 static void
1324 nv50_sor_update(struct nouveau_encoder *nv_encoder, u8 head,
1325                 struct nv50_head_atom *asyh, u8 proto, u8 depth)
1326 {
1327         struct nv50_disp *disp = nv50_disp(nv_encoder->base.base.dev);
1328         struct nv50_core *core = disp->core;
1329
1330         if (!asyh) {
1331                 nv_encoder->ctrl &= ~BIT(head);
1332                 if (!(nv_encoder->ctrl & 0x0000000f))
1333                         nv_encoder->ctrl = 0;
1334         } else {
1335                 nv_encoder->ctrl |= proto << 8;
1336                 nv_encoder->ctrl |= BIT(head);
1337                 asyh->or.depth = depth;
1338         }
1339
1340         core->func->sor->ctrl(core, nv_encoder->or, nv_encoder->ctrl, asyh);
1341 }
1342
1343 static void
1344 nv50_sor_disable(struct drm_encoder *encoder)
1345 {
1346         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
1347         struct nouveau_crtc *nv_crtc = nouveau_crtc(nv_encoder->crtc);
1348
1349         nv_encoder->crtc = NULL;
1350
1351         if (nv_crtc) {
1352                 struct nvkm_i2c_aux *aux = nv_encoder->aux;
1353                 u8 pwr;
1354
1355                 if (aux) {
1356                         int ret = nvkm_rdaux(aux, DP_SET_POWER, &pwr, 1);
1357                         if (ret == 0) {
1358                                 pwr &= ~DP_SET_POWER_MASK;
1359                                 pwr |=  DP_SET_POWER_D3;
1360                                 nvkm_wraux(aux, DP_SET_POWER, &pwr, 1);
1361                         }
1362                 }
1363
1364                 nv_encoder->update(nv_encoder, nv_crtc->index, NULL, 0, 0);
1365                 nv50_audio_disable(encoder, nv_crtc);
1366                 nv50_hdmi_disable(&nv_encoder->base.base, nv_crtc);
1367                 nv50_outp_release(nv_encoder);
1368         }
1369 }
1370
1371 static void
1372 nv50_sor_enable(struct drm_encoder *encoder)
1373 {
1374         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
1375         struct nouveau_crtc *nv_crtc = nouveau_crtc(encoder->crtc);
1376         struct nv50_head_atom *asyh = nv50_head_atom(nv_crtc->base.state);
1377         struct drm_display_mode *mode = &asyh->state.adjusted_mode;
1378         struct {
1379                 struct nv50_disp_mthd_v1 base;
1380                 struct nv50_disp_sor_lvds_script_v0 lvds;
1381         } lvds = {
1382                 .base.version = 1,
1383                 .base.method  = NV50_DISP_MTHD_V1_SOR_LVDS_SCRIPT,
1384                 .base.hasht   = nv_encoder->dcb->hasht,
1385                 .base.hashm   = nv_encoder->dcb->hashm,
1386         };
1387         struct nv50_disp *disp = nv50_disp(encoder->dev);
1388         struct drm_device *dev = encoder->dev;
1389         struct nouveau_drm *drm = nouveau_drm(dev);
1390         struct nouveau_connector *nv_connector;
1391         struct nvbios *bios = &drm->vbios;
1392         u8 proto = 0xf;
1393         u8 depth = 0x0;
1394
1395         nv_connector = nouveau_encoder_connector_get(nv_encoder);
1396         nv_encoder->crtc = encoder->crtc;
1397         nv50_outp_acquire(nv_encoder);
1398
1399         switch (nv_encoder->dcb->type) {
1400         case DCB_OUTPUT_TMDS:
1401                 if (nv_encoder->link & 1) {
1402                         proto = 0x1;
1403                         /* Only enable dual-link if:
1404                          *  - Need to (i.e. rate > 165MHz)
1405                          *  - DCB says we can
1406                          *  - Not an HDMI monitor, since there's no dual-link
1407                          *    on HDMI.
1408                          */
1409                         if (mode->clock >= 165000 &&
1410                             nv_encoder->dcb->duallink_possible &&
1411                             !drm_detect_hdmi_monitor(nv_connector->edid))
1412                                 proto |= 0x4;
1413                 } else {
1414                         proto = 0x2;
1415                 }
1416
1417                 nv50_hdmi_enable(&nv_encoder->base.base, mode);
1418                 break;
1419         case DCB_OUTPUT_LVDS:
1420                 proto = 0x0;
1421
1422                 if (bios->fp_no_ddc) {
1423                         if (bios->fp.dual_link)
1424                                 lvds.lvds.script |= 0x0100;
1425                         if (bios->fp.if_is_24bit)
1426                                 lvds.lvds.script |= 0x0200;
1427                 } else {
1428                         if (nv_connector->type == DCB_CONNECTOR_LVDS_SPWG) {
1429                                 if (((u8 *)nv_connector->edid)[121] == 2)
1430                                         lvds.lvds.script |= 0x0100;
1431                         } else
1432                         if (mode->clock >= bios->fp.duallink_transition_clk) {
1433                                 lvds.lvds.script |= 0x0100;
1434                         }
1435
1436                         if (lvds.lvds.script & 0x0100) {
1437                                 if (bios->fp.strapless_is_24bit & 2)
1438                                         lvds.lvds.script |= 0x0200;
1439                         } else {
1440                                 if (bios->fp.strapless_is_24bit & 1)
1441                                         lvds.lvds.script |= 0x0200;
1442                         }
1443
1444                         if (nv_connector->base.display_info.bpc == 8)
1445                                 lvds.lvds.script |= 0x0200;
1446                 }
1447
1448                 nvif_mthd(&disp->disp->object, 0, &lvds, sizeof(lvds));
1449                 break;
1450         case DCB_OUTPUT_DP:
1451                 if (nv_connector->base.display_info.bpc == 6)
1452                         depth = 0x2;
1453                 else
1454                 if (nv_connector->base.display_info.bpc == 8)
1455                         depth = 0x5;
1456                 else
1457                         depth = 0x6;
1458
1459                 if (nv_encoder->link & 1)
1460                         proto = 0x8;
1461                 else
1462                         proto = 0x9;
1463
1464                 nv50_audio_enable(encoder, mode);
1465                 break;
1466         default:
1467                 BUG();
1468                 break;
1469         }
1470
1471         nv_encoder->update(nv_encoder, nv_crtc->index, asyh, proto, depth);
1472 }
1473
1474 static const struct drm_encoder_helper_funcs
1475 nv50_sor_help = {
1476         .atomic_check = nv50_outp_atomic_check,
1477         .enable = nv50_sor_enable,
1478         .disable = nv50_sor_disable,
1479 };
1480
1481 static void
1482 nv50_sor_destroy(struct drm_encoder *encoder)
1483 {
1484         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
1485         nv50_mstm_del(&nv_encoder->dp.mstm);
1486         drm_encoder_cleanup(encoder);
1487         kfree(encoder);
1488 }
1489
1490 static const struct drm_encoder_funcs
1491 nv50_sor_func = {
1492         .destroy = nv50_sor_destroy,
1493 };
1494
1495 static int
1496 nv50_sor_create(struct drm_connector *connector, struct dcb_output *dcbe)
1497 {
1498         struct nouveau_connector *nv_connector = nouveau_connector(connector);
1499         struct nouveau_drm *drm = nouveau_drm(connector->dev);
1500         struct nvkm_bios *bios = nvxx_bios(&drm->client.device);
1501         struct nvkm_i2c *i2c = nvxx_i2c(&drm->client.device);
1502         struct nouveau_encoder *nv_encoder;
1503         struct drm_encoder *encoder;
1504         u8 ver, hdr, cnt, len;
1505         u32 data;
1506         int type, ret;
1507
1508         switch (dcbe->type) {
1509         case DCB_OUTPUT_LVDS: type = DRM_MODE_ENCODER_LVDS; break;
1510         case DCB_OUTPUT_TMDS:
1511         case DCB_OUTPUT_DP:
1512         default:
1513                 type = DRM_MODE_ENCODER_TMDS;
1514                 break;
1515         }
1516
1517         nv_encoder = kzalloc(sizeof(*nv_encoder), GFP_KERNEL);
1518         if (!nv_encoder)
1519                 return -ENOMEM;
1520         nv_encoder->dcb = dcbe;
1521         nv_encoder->update = nv50_sor_update;
1522
1523         encoder = to_drm_encoder(nv_encoder);
1524         encoder->possible_crtcs = dcbe->heads;
1525         encoder->possible_clones = 0;
1526         drm_encoder_init(connector->dev, encoder, &nv50_sor_func, type,
1527                          "sor-%04x-%04x", dcbe->hasht, dcbe->hashm);
1528         drm_encoder_helper_add(encoder, &nv50_sor_help);
1529
1530         drm_connector_attach_encoder(connector, encoder);
1531
1532         if (dcbe->type == DCB_OUTPUT_DP) {
1533                 struct nv50_disp *disp = nv50_disp(encoder->dev);
1534                 struct nvkm_i2c_aux *aux =
1535                         nvkm_i2c_aux_find(i2c, dcbe->i2c_index);
1536                 if (aux) {
1537                         if (disp->disp->object.oclass < GF110_DISP) {
1538                                 /* HW has no support for address-only
1539                                  * transactions, so we're required to
1540                                  * use custom I2C-over-AUX code.
1541                                  */
1542                                 nv_encoder->i2c = &aux->i2c;
1543                         } else {
1544                                 nv_encoder->i2c = &nv_connector->aux.ddc;
1545                         }
1546                         nv_encoder->aux = aux;
1547                 }
1548
1549                 if ((data = nvbios_dp_table(bios, &ver, &hdr, &cnt, &len)) &&
1550                     ver >= 0x40 && (nvbios_rd08(bios, data + 0x08) & 0x04)) {
1551                         ret = nv50_mstm_new(nv_encoder, &nv_connector->aux, 16,
1552                                             nv_connector->base.base.id,
1553                                             &nv_encoder->dp.mstm);
1554                         if (ret)
1555                                 return ret;
1556                 }
1557         } else {
1558                 struct nvkm_i2c_bus *bus =
1559                         nvkm_i2c_bus_find(i2c, dcbe->i2c_index);
1560                 if (bus)
1561                         nv_encoder->i2c = &bus->i2c;
1562         }
1563
1564         return 0;
1565 }
1566
1567 /******************************************************************************
1568  * PIOR
1569  *****************************************************************************/
1570 static int
1571 nv50_pior_atomic_check(struct drm_encoder *encoder,
1572                        struct drm_crtc_state *crtc_state,
1573                        struct drm_connector_state *conn_state)
1574 {
1575         int ret = nv50_outp_atomic_check(encoder, crtc_state, conn_state);
1576         if (ret)
1577                 return ret;
1578         crtc_state->adjusted_mode.clock *= 2;
1579         return 0;
1580 }
1581
1582 static void
1583 nv50_pior_disable(struct drm_encoder *encoder)
1584 {
1585         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
1586         struct nv50_core *core = nv50_disp(encoder->dev)->core;
1587         if (nv_encoder->crtc)
1588                 core->func->pior->ctrl(core, nv_encoder->or, 0x00000000, NULL);
1589         nv_encoder->crtc = NULL;
1590         nv50_outp_release(nv_encoder);
1591 }
1592
1593 static void
1594 nv50_pior_enable(struct drm_encoder *encoder)
1595 {
1596         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
1597         struct nouveau_crtc *nv_crtc = nouveau_crtc(encoder->crtc);
1598         struct nouveau_connector *nv_connector;
1599         struct nv50_head_atom *asyh = nv50_head_atom(nv_crtc->base.state);
1600         struct nv50_core *core = nv50_disp(encoder->dev)->core;
1601         u8 owner = 1 << nv_crtc->index;
1602         u8 proto;
1603
1604         nv50_outp_acquire(nv_encoder);
1605
1606         nv_connector = nouveau_encoder_connector_get(nv_encoder);
1607         switch (nv_connector->base.display_info.bpc) {
1608         case 10: asyh->or.depth = 0x6; break;
1609         case  8: asyh->or.depth = 0x5; break;
1610         case  6: asyh->or.depth = 0x2; break;
1611         default: asyh->or.depth = 0x0; break;
1612         }
1613
1614         switch (nv_encoder->dcb->type) {
1615         case DCB_OUTPUT_TMDS:
1616         case DCB_OUTPUT_DP:
1617                 proto = 0x0;
1618                 break;
1619         default:
1620                 BUG();
1621                 break;
1622         }
1623
1624         core->func->pior->ctrl(core, nv_encoder->or, (proto << 8) | owner, asyh);
1625         nv_encoder->crtc = encoder->crtc;
1626 }
1627
1628 static const struct drm_encoder_helper_funcs
1629 nv50_pior_help = {
1630         .atomic_check = nv50_pior_atomic_check,
1631         .enable = nv50_pior_enable,
1632         .disable = nv50_pior_disable,
1633 };
1634
1635 static void
1636 nv50_pior_destroy(struct drm_encoder *encoder)
1637 {
1638         drm_encoder_cleanup(encoder);
1639         kfree(encoder);
1640 }
1641
1642 static const struct drm_encoder_funcs
1643 nv50_pior_func = {
1644         .destroy = nv50_pior_destroy,
1645 };
1646
1647 static int
1648 nv50_pior_create(struct drm_connector *connector, struct dcb_output *dcbe)
1649 {
1650         struct nouveau_drm *drm = nouveau_drm(connector->dev);
1651         struct nvkm_i2c *i2c = nvxx_i2c(&drm->client.device);
1652         struct nvkm_i2c_bus *bus = NULL;
1653         struct nvkm_i2c_aux *aux = NULL;
1654         struct i2c_adapter *ddc;
1655         struct nouveau_encoder *nv_encoder;
1656         struct drm_encoder *encoder;
1657         int type;
1658
1659         switch (dcbe->type) {
1660         case DCB_OUTPUT_TMDS:
1661                 bus  = nvkm_i2c_bus_find(i2c, NVKM_I2C_BUS_EXT(dcbe->extdev));
1662                 ddc  = bus ? &bus->i2c : NULL;
1663                 type = DRM_MODE_ENCODER_TMDS;
1664                 break;
1665         case DCB_OUTPUT_DP:
1666                 aux  = nvkm_i2c_aux_find(i2c, NVKM_I2C_AUX_EXT(dcbe->extdev));
1667                 ddc  = aux ? &aux->i2c : NULL;
1668                 type = DRM_MODE_ENCODER_TMDS;
1669                 break;
1670         default:
1671                 return -ENODEV;
1672         }
1673
1674         nv_encoder = kzalloc(sizeof(*nv_encoder), GFP_KERNEL);
1675         if (!nv_encoder)
1676                 return -ENOMEM;
1677         nv_encoder->dcb = dcbe;
1678         nv_encoder->i2c = ddc;
1679         nv_encoder->aux = aux;
1680
1681         encoder = to_drm_encoder(nv_encoder);
1682         encoder->possible_crtcs = dcbe->heads;
1683         encoder->possible_clones = 0;
1684         drm_encoder_init(connector->dev, encoder, &nv50_pior_func, type,
1685                          "pior-%04x-%04x", dcbe->hasht, dcbe->hashm);
1686         drm_encoder_helper_add(encoder, &nv50_pior_help);
1687
1688         drm_connector_attach_encoder(connector, encoder);
1689         return 0;
1690 }
1691
1692 /******************************************************************************
1693  * Atomic
1694  *****************************************************************************/
1695
1696 static void
1697 nv50_disp_atomic_commit_core(struct drm_atomic_state *state, u32 *interlock)
1698 {
1699         struct nouveau_drm *drm = nouveau_drm(state->dev);
1700         struct nv50_disp *disp = nv50_disp(drm->dev);
1701         struct nv50_core *core = disp->core;
1702         struct nv50_mstm *mstm;
1703         struct drm_encoder *encoder;
1704
1705         NV_ATOMIC(drm, "commit core %08x\n", interlock[NV50_DISP_INTERLOCK_BASE]);
1706
1707         drm_for_each_encoder(encoder, drm->dev) {
1708                 if (encoder->encoder_type != DRM_MODE_ENCODER_DPMST) {
1709                         mstm = nouveau_encoder(encoder)->dp.mstm;
1710                         if (mstm && mstm->modified)
1711                                 nv50_mstm_prepare(mstm);
1712                 }
1713         }
1714
1715         core->func->ntfy_init(disp->sync, NV50_DISP_CORE_NTFY);
1716         core->func->update(core, interlock, true);
1717         if (core->func->ntfy_wait_done(disp->sync, NV50_DISP_CORE_NTFY,
1718                                        disp->core->chan.base.device))
1719                 NV_ERROR(drm, "core notifier timeout\n");
1720
1721         drm_for_each_encoder(encoder, drm->dev) {
1722                 if (encoder->encoder_type != DRM_MODE_ENCODER_DPMST) {
1723                         mstm = nouveau_encoder(encoder)->dp.mstm;
1724                         if (mstm && mstm->modified)
1725                                 nv50_mstm_cleanup(mstm);
1726                 }
1727         }
1728 }
1729
1730 static void
1731 nv50_disp_atomic_commit_wndw(struct drm_atomic_state *state, u32 *interlock)
1732 {
1733         struct drm_plane_state *new_plane_state;
1734         struct drm_plane *plane;
1735         int i;
1736
1737         for_each_new_plane_in_state(state, plane, new_plane_state, i) {
1738                 struct nv50_wndw *wndw = nv50_wndw(plane);
1739                 if (interlock[wndw->interlock.type] & wndw->interlock.data) {
1740                         if (wndw->func->update)
1741                                 wndw->func->update(wndw, interlock);
1742                 }
1743         }
1744 }
1745
1746 static void
1747 nv50_disp_atomic_commit_tail(struct drm_atomic_state *state)
1748 {
1749         struct drm_device *dev = state->dev;
1750         struct drm_crtc_state *new_crtc_state, *old_crtc_state;
1751         struct drm_crtc *crtc;
1752         struct drm_plane_state *new_plane_state;
1753         struct drm_plane *plane;
1754         struct nouveau_drm *drm = nouveau_drm(dev);
1755         struct nv50_disp *disp = nv50_disp(dev);
1756         struct nv50_atom *atom = nv50_atom(state);
1757         struct nv50_outp_atom *outp, *outt;
1758         u32 interlock[NV50_DISP_INTERLOCK__SIZE] = {};
1759         int i;
1760
1761         NV_ATOMIC(drm, "commit %d %d\n", atom->lock_core, atom->flush_disable);
1762         drm_atomic_helper_wait_for_fences(dev, state, false);
1763         drm_atomic_helper_wait_for_dependencies(state);
1764         drm_atomic_helper_update_legacy_modeset_state(dev, state);
1765
1766         if (atom->lock_core)
1767                 mutex_lock(&disp->mutex);
1768
1769         /* Disable head(s). */
1770         for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
1771                 struct nv50_head_atom *asyh = nv50_head_atom(new_crtc_state);
1772                 struct nv50_head *head = nv50_head(crtc);
1773
1774                 NV_ATOMIC(drm, "%s: clr %04x (set %04x)\n", crtc->name,
1775                           asyh->clr.mask, asyh->set.mask);
1776                 if (old_crtc_state->active && !new_crtc_state->active)
1777                         drm_crtc_vblank_off(crtc);
1778
1779                 if (asyh->clr.mask) {
1780                         nv50_head_flush_clr(head, asyh, atom->flush_disable);
1781                         interlock[NV50_DISP_INTERLOCK_CORE] |= 1;
1782                 }
1783         }
1784
1785         /* Disable plane(s). */
1786         for_each_new_plane_in_state(state, plane, new_plane_state, i) {
1787                 struct nv50_wndw_atom *asyw = nv50_wndw_atom(new_plane_state);
1788                 struct nv50_wndw *wndw = nv50_wndw(plane);
1789
1790                 NV_ATOMIC(drm, "%s: clr %02x (set %02x)\n", plane->name,
1791                           asyw->clr.mask, asyw->set.mask);
1792                 if (!asyw->clr.mask)
1793                         continue;
1794
1795                 nv50_wndw_flush_clr(wndw, interlock, atom->flush_disable, asyw);
1796         }
1797
1798         /* Disable output path(s). */
1799         list_for_each_entry(outp, &atom->outp, head) {
1800                 const struct drm_encoder_helper_funcs *help;
1801                 struct drm_encoder *encoder;
1802
1803                 encoder = outp->encoder;
1804                 help = encoder->helper_private;
1805
1806                 NV_ATOMIC(drm, "%s: clr %02x (set %02x)\n", encoder->name,
1807                           outp->clr.mask, outp->set.mask);
1808
1809                 if (outp->clr.mask) {
1810                         help->disable(encoder);
1811                         interlock[NV50_DISP_INTERLOCK_CORE] |= 1;
1812                         if (outp->flush_disable) {
1813                                 nv50_disp_atomic_commit_wndw(state, interlock);
1814                                 nv50_disp_atomic_commit_core(state, interlock);
1815                                 memset(interlock, 0x00, sizeof(interlock));
1816                         }
1817                 }
1818         }
1819
1820         /* Flush disable. */
1821         if (interlock[NV50_DISP_INTERLOCK_CORE]) {
1822                 if (atom->flush_disable) {
1823                         nv50_disp_atomic_commit_wndw(state, interlock);
1824                         nv50_disp_atomic_commit_core(state, interlock);
1825                         memset(interlock, 0x00, sizeof(interlock));
1826                 }
1827         }
1828
1829         /* Update output path(s). */
1830         list_for_each_entry_safe(outp, outt, &atom->outp, head) {
1831                 const struct drm_encoder_helper_funcs *help;
1832                 struct drm_encoder *encoder;
1833
1834                 encoder = outp->encoder;
1835                 help = encoder->helper_private;
1836
1837                 NV_ATOMIC(drm, "%s: set %02x (clr %02x)\n", encoder->name,
1838                           outp->set.mask, outp->clr.mask);
1839
1840                 if (outp->set.mask) {
1841                         help->enable(encoder);
1842                         interlock[NV50_DISP_INTERLOCK_CORE] = 1;
1843                 }
1844
1845                 list_del(&outp->head);
1846                 kfree(outp);
1847         }
1848
1849         /* Update head(s). */
1850         for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
1851                 struct nv50_head_atom *asyh = nv50_head_atom(new_crtc_state);
1852                 struct nv50_head *head = nv50_head(crtc);
1853
1854                 NV_ATOMIC(drm, "%s: set %04x (clr %04x)\n", crtc->name,
1855                           asyh->set.mask, asyh->clr.mask);
1856
1857                 if (asyh->set.mask) {
1858                         nv50_head_flush_set(head, asyh);
1859                         interlock[NV50_DISP_INTERLOCK_CORE] = 1;
1860                 }
1861
1862                 if (new_crtc_state->active) {
1863                         if (!old_crtc_state->active)
1864                                 drm_crtc_vblank_on(crtc);
1865                         if (new_crtc_state->event)
1866                                 drm_crtc_vblank_get(crtc);
1867                 }
1868         }
1869
1870         /* Update plane(s). */
1871         for_each_new_plane_in_state(state, plane, new_plane_state, i) {
1872                 struct nv50_wndw_atom *asyw = nv50_wndw_atom(new_plane_state);
1873                 struct nv50_wndw *wndw = nv50_wndw(plane);
1874
1875                 NV_ATOMIC(drm, "%s: set %02x (clr %02x)\n", plane->name,
1876                           asyw->set.mask, asyw->clr.mask);
1877                 if ( !asyw->set.mask &&
1878                     (!asyw->clr.mask || atom->flush_disable))
1879                         continue;
1880
1881                 nv50_wndw_flush_set(wndw, interlock, asyw);
1882         }
1883
1884         /* Flush update. */
1885         nv50_disp_atomic_commit_wndw(state, interlock);
1886
1887         if (interlock[NV50_DISP_INTERLOCK_CORE]) {
1888                 if (interlock[NV50_DISP_INTERLOCK_BASE] ||
1889                     interlock[NV50_DISP_INTERLOCK_OVLY] ||
1890                     interlock[NV50_DISP_INTERLOCK_WNDW] ||
1891                     !atom->state.legacy_cursor_update)
1892                         nv50_disp_atomic_commit_core(state, interlock);
1893                 else
1894                         disp->core->func->update(disp->core, interlock, false);
1895         }
1896
1897         if (atom->lock_core)
1898                 mutex_unlock(&disp->mutex);
1899
1900         /* Wait for HW to signal completion. */
1901         for_each_new_plane_in_state(state, plane, new_plane_state, i) {
1902                 struct nv50_wndw_atom *asyw = nv50_wndw_atom(new_plane_state);
1903                 struct nv50_wndw *wndw = nv50_wndw(plane);
1904                 int ret = nv50_wndw_wait_armed(wndw, asyw);
1905                 if (ret)
1906                         NV_ERROR(drm, "%s: timeout\n", plane->name);
1907         }
1908
1909         for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
1910                 if (new_crtc_state->event) {
1911                         unsigned long flags;
1912                         /* Get correct count/ts if racing with vblank irq */
1913                         if (new_crtc_state->active)
1914                                 drm_crtc_accurate_vblank_count(crtc);
1915                         spin_lock_irqsave(&crtc->dev->event_lock, flags);
1916                         drm_crtc_send_vblank_event(crtc, new_crtc_state->event);
1917                         spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
1918
1919                         new_crtc_state->event = NULL;
1920                         if (new_crtc_state->active)
1921                                 drm_crtc_vblank_put(crtc);
1922                 }
1923         }
1924
1925         drm_atomic_helper_commit_hw_done(state);
1926         drm_atomic_helper_cleanup_planes(dev, state);
1927         drm_atomic_helper_commit_cleanup_done(state);
1928         drm_atomic_state_put(state);
1929 }
1930
1931 static void
1932 nv50_disp_atomic_commit_work(struct work_struct *work)
1933 {
1934         struct drm_atomic_state *state =
1935                 container_of(work, typeof(*state), commit_work);
1936         nv50_disp_atomic_commit_tail(state);
1937 }
1938
1939 static int
1940 nv50_disp_atomic_commit(struct drm_device *dev,
1941                         struct drm_atomic_state *state, bool nonblock)
1942 {
1943         struct nouveau_drm *drm = nouveau_drm(dev);
1944         struct drm_plane_state *new_plane_state;
1945         struct drm_plane *plane;
1946         struct drm_crtc *crtc;
1947         bool active = false;
1948         int ret, i;
1949
1950         ret = pm_runtime_get_sync(dev->dev);
1951         if (ret < 0 && ret != -EACCES)
1952                 return ret;
1953
1954         ret = drm_atomic_helper_setup_commit(state, nonblock);
1955         if (ret)
1956                 goto done;
1957
1958         INIT_WORK(&state->commit_work, nv50_disp_atomic_commit_work);
1959
1960         ret = drm_atomic_helper_prepare_planes(dev, state);
1961         if (ret)
1962                 goto done;
1963
1964         if (!nonblock) {
1965                 ret = drm_atomic_helper_wait_for_fences(dev, state, true);
1966                 if (ret)
1967                         goto err_cleanup;
1968         }
1969
1970         ret = drm_atomic_helper_swap_state(state, true);
1971         if (ret)
1972                 goto err_cleanup;
1973
1974         for_each_new_plane_in_state(state, plane, new_plane_state, i) {
1975                 struct nv50_wndw_atom *asyw = nv50_wndw_atom(new_plane_state);
1976                 struct nv50_wndw *wndw = nv50_wndw(plane);
1977
1978                 if (asyw->set.image)
1979                         nv50_wndw_ntfy_enable(wndw, asyw);
1980         }
1981
1982         drm_atomic_state_get(state);
1983
1984         if (nonblock)
1985                 queue_work(system_unbound_wq, &state->commit_work);
1986         else
1987                 nv50_disp_atomic_commit_tail(state);
1988
1989         drm_for_each_crtc(crtc, dev) {
1990                 if (crtc->state->active) {
1991                         if (!drm->have_disp_power_ref) {
1992                                 drm->have_disp_power_ref = true;
1993                                 return 0;
1994                         }
1995                         active = true;
1996                         break;
1997                 }
1998         }
1999
2000         if (!active && drm->have_disp_power_ref) {
2001                 pm_runtime_put_autosuspend(dev->dev);
2002                 drm->have_disp_power_ref = false;
2003         }
2004
2005 err_cleanup:
2006         if (ret)
2007                 drm_atomic_helper_cleanup_planes(dev, state);
2008 done:
2009         pm_runtime_put_autosuspend(dev->dev);
2010         return ret;
2011 }
2012
2013 static struct nv50_outp_atom *
2014 nv50_disp_outp_atomic_add(struct nv50_atom *atom, struct drm_encoder *encoder)
2015 {
2016         struct nv50_outp_atom *outp;
2017
2018         list_for_each_entry(outp, &atom->outp, head) {
2019                 if (outp->encoder == encoder)
2020                         return outp;
2021         }
2022
2023         outp = kzalloc(sizeof(*outp), GFP_KERNEL);
2024         if (!outp)
2025                 return ERR_PTR(-ENOMEM);
2026
2027         list_add(&outp->head, &atom->outp);
2028         outp->encoder = encoder;
2029         return outp;
2030 }
2031
2032 static int
2033 nv50_disp_outp_atomic_check_clr(struct nv50_atom *atom,
2034                                 struct drm_connector_state *old_connector_state)
2035 {
2036         struct drm_encoder *encoder = old_connector_state->best_encoder;
2037         struct drm_crtc_state *old_crtc_state, *new_crtc_state;
2038         struct drm_crtc *crtc;
2039         struct nv50_outp_atom *outp;
2040
2041         if (!(crtc = old_connector_state->crtc))
2042                 return 0;
2043
2044         old_crtc_state = drm_atomic_get_old_crtc_state(&atom->state, crtc);
2045         new_crtc_state = drm_atomic_get_new_crtc_state(&atom->state, crtc);
2046         if (old_crtc_state->active && drm_atomic_crtc_needs_modeset(new_crtc_state)) {
2047                 outp = nv50_disp_outp_atomic_add(atom, encoder);
2048                 if (IS_ERR(outp))
2049                         return PTR_ERR(outp);
2050
2051                 if (outp->encoder->encoder_type == DRM_MODE_ENCODER_DPMST) {
2052                         outp->flush_disable = true;
2053                         atom->flush_disable = true;
2054                 }
2055                 outp->clr.ctrl = true;
2056                 atom->lock_core = true;
2057         }
2058
2059         return 0;
2060 }
2061
2062 static int
2063 nv50_disp_outp_atomic_check_set(struct nv50_atom *atom,
2064                                 struct drm_connector_state *connector_state)
2065 {
2066         struct drm_encoder *encoder = connector_state->best_encoder;
2067         struct drm_crtc_state *new_crtc_state;
2068         struct drm_crtc *crtc;
2069         struct nv50_outp_atom *outp;
2070
2071         if (!(crtc = connector_state->crtc))
2072                 return 0;
2073
2074         new_crtc_state = drm_atomic_get_new_crtc_state(&atom->state, crtc);
2075         if (new_crtc_state->active && drm_atomic_crtc_needs_modeset(new_crtc_state)) {
2076                 outp = nv50_disp_outp_atomic_add(atom, encoder);
2077                 if (IS_ERR(outp))
2078                         return PTR_ERR(outp);
2079
2080                 outp->set.ctrl = true;
2081                 atom->lock_core = true;
2082         }
2083
2084         return 0;
2085 }
2086
2087 static int
2088 nv50_disp_atomic_check(struct drm_device *dev, struct drm_atomic_state *state)
2089 {
2090         struct nv50_atom *atom = nv50_atom(state);
2091         struct drm_connector_state *old_connector_state, *new_connector_state;
2092         struct drm_connector *connector;
2093         struct drm_crtc_state *new_crtc_state;
2094         struct drm_crtc *crtc;
2095         int ret, i;
2096
2097         /* We need to handle colour management on a per-plane basis. */
2098         for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
2099                 if (new_crtc_state->color_mgmt_changed) {
2100                         ret = drm_atomic_add_affected_planes(state, crtc);
2101                         if (ret)
2102                                 return ret;
2103                 }
2104         }
2105
2106         ret = drm_atomic_helper_check(dev, state);
2107         if (ret)
2108                 return ret;
2109
2110         for_each_oldnew_connector_in_state(state, connector, old_connector_state, new_connector_state, i) {
2111                 ret = nv50_disp_outp_atomic_check_clr(atom, old_connector_state);
2112                 if (ret)
2113                         return ret;
2114
2115                 ret = nv50_disp_outp_atomic_check_set(atom, new_connector_state);
2116                 if (ret)
2117                         return ret;
2118         }
2119
2120         return 0;
2121 }
2122
2123 static void
2124 nv50_disp_atomic_state_clear(struct drm_atomic_state *state)
2125 {
2126         struct nv50_atom *atom = nv50_atom(state);
2127         struct nv50_outp_atom *outp, *outt;
2128
2129         list_for_each_entry_safe(outp, outt, &atom->outp, head) {
2130                 list_del(&outp->head);
2131                 kfree(outp);
2132         }
2133
2134         drm_atomic_state_default_clear(state);
2135 }
2136
2137 static void
2138 nv50_disp_atomic_state_free(struct drm_atomic_state *state)
2139 {
2140         struct nv50_atom *atom = nv50_atom(state);
2141         drm_atomic_state_default_release(&atom->state);
2142         kfree(atom);
2143 }
2144
2145 static struct drm_atomic_state *
2146 nv50_disp_atomic_state_alloc(struct drm_device *dev)
2147 {
2148         struct nv50_atom *atom;
2149         if (!(atom = kzalloc(sizeof(*atom), GFP_KERNEL)) ||
2150             drm_atomic_state_init(dev, &atom->state) < 0) {
2151                 kfree(atom);
2152                 return NULL;
2153         }
2154         INIT_LIST_HEAD(&atom->outp);
2155         return &atom->state;
2156 }
2157
2158 static const struct drm_mode_config_funcs
2159 nv50_disp_func = {
2160         .fb_create = nouveau_user_framebuffer_create,
2161         .output_poll_changed = nouveau_fbcon_output_poll_changed,
2162         .atomic_check = nv50_disp_atomic_check,
2163         .atomic_commit = nv50_disp_atomic_commit,
2164         .atomic_state_alloc = nv50_disp_atomic_state_alloc,
2165         .atomic_state_clear = nv50_disp_atomic_state_clear,
2166         .atomic_state_free = nv50_disp_atomic_state_free,
2167 };
2168
2169 /******************************************************************************
2170  * Init
2171  *****************************************************************************/
2172
2173 void
2174 nv50_display_fini(struct drm_device *dev)
2175 {
2176         struct nouveau_encoder *nv_encoder;
2177         struct drm_encoder *encoder;
2178         struct drm_plane *plane;
2179
2180         drm_for_each_plane(plane, dev) {
2181                 struct nv50_wndw *wndw = nv50_wndw(plane);
2182                 if (plane->funcs != &nv50_wndw)
2183                         continue;
2184                 nv50_wndw_fini(wndw);
2185         }
2186
2187         list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
2188                 if (encoder->encoder_type != DRM_MODE_ENCODER_DPMST) {
2189                         nv_encoder = nouveau_encoder(encoder);
2190                         nv50_mstm_fini(nv_encoder->dp.mstm);
2191                 }
2192         }
2193 }
2194
2195 int
2196 nv50_display_init(struct drm_device *dev)
2197 {
2198         struct nv50_core *core = nv50_disp(dev)->core;
2199         struct drm_encoder *encoder;
2200         struct drm_plane *plane;
2201
2202         core->func->init(core);
2203
2204         list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
2205                 if (encoder->encoder_type != DRM_MODE_ENCODER_DPMST) {
2206                         struct nouveau_encoder *nv_encoder =
2207                                 nouveau_encoder(encoder);
2208                         nv50_mstm_init(nv_encoder->dp.mstm);
2209                 }
2210         }
2211
2212         drm_for_each_plane(plane, dev) {
2213                 struct nv50_wndw *wndw = nv50_wndw(plane);
2214                 if (plane->funcs != &nv50_wndw)
2215                         continue;
2216                 nv50_wndw_init(wndw);
2217         }
2218
2219         return 0;
2220 }
2221
2222 void
2223 nv50_display_destroy(struct drm_device *dev)
2224 {
2225         struct nv50_disp *disp = nv50_disp(dev);
2226
2227         nv50_core_del(&disp->core);
2228
2229         nouveau_bo_unmap(disp->sync);
2230         if (disp->sync)
2231                 nouveau_bo_unpin(disp->sync);
2232         nouveau_bo_ref(NULL, &disp->sync);
2233
2234         nouveau_display(dev)->priv = NULL;
2235         kfree(disp);
2236 }
2237
2238 int
2239 nv50_display_create(struct drm_device *dev)
2240 {
2241         struct nvif_device *device = &nouveau_drm(dev)->client.device;
2242         struct nouveau_drm *drm = nouveau_drm(dev);
2243         struct dcb_table *dcb = &drm->vbios.dcb;
2244         struct drm_connector *connector, *tmp;
2245         struct nv50_disp *disp;
2246         struct dcb_output *dcbe;
2247         int crtcs, ret, i;
2248
2249         disp = kzalloc(sizeof(*disp), GFP_KERNEL);
2250         if (!disp)
2251                 return -ENOMEM;
2252
2253         mutex_init(&disp->mutex);
2254
2255         nouveau_display(dev)->priv = disp;
2256         nouveau_display(dev)->dtor = nv50_display_destroy;
2257         nouveau_display(dev)->init = nv50_display_init;
2258         nouveau_display(dev)->fini = nv50_display_fini;
2259         disp->disp = &nouveau_display(dev)->disp;
2260         dev->mode_config.funcs = &nv50_disp_func;
2261         dev->mode_config.quirk_addfb_prefer_xbgr_30bpp = true;
2262
2263         /* small shared memory area we use for notifiers and semaphores */
2264         ret = nouveau_bo_new(&drm->client, 4096, 0x1000, TTM_PL_FLAG_VRAM,
2265                              0, 0x0000, NULL, NULL, &disp->sync);
2266         if (!ret) {
2267                 ret = nouveau_bo_pin(disp->sync, TTM_PL_FLAG_VRAM, true);
2268                 if (!ret) {
2269                         ret = nouveau_bo_map(disp->sync);
2270                         if (ret)
2271                                 nouveau_bo_unpin(disp->sync);
2272                 }
2273                 if (ret)
2274                         nouveau_bo_ref(NULL, &disp->sync);
2275         }
2276
2277         if (ret)
2278                 goto out;
2279
2280         /* allocate master evo channel */
2281         ret = nv50_core_new(drm, &disp->core);
2282         if (ret)
2283                 goto out;
2284
2285         /* create crtc objects to represent the hw heads */
2286         if (disp->disp->object.oclass >= GV100_DISP)
2287                 crtcs = nvif_rd32(&device->object, 0x610060) & 0xff;
2288         else
2289         if (disp->disp->object.oclass >= GF110_DISP)
2290                 crtcs = nvif_rd32(&device->object, 0x612004) & 0xf;
2291         else
2292                 crtcs = 0x3;
2293
2294         for (i = 0; i < fls(crtcs); i++) {
2295                 if (!(crtcs & (1 << i)))
2296                         continue;
2297                 ret = nv50_head_create(dev, i);
2298                 if (ret)
2299                         goto out;
2300         }
2301
2302         /* create encoder/connector objects based on VBIOS DCB table */
2303         for (i = 0, dcbe = &dcb->entry[0]; i < dcb->entries; i++, dcbe++) {
2304                 connector = nouveau_connector_create(dev, dcbe->connector);
2305                 if (IS_ERR(connector))
2306                         continue;
2307
2308                 if (dcbe->location == DCB_LOC_ON_CHIP) {
2309                         switch (dcbe->type) {
2310                         case DCB_OUTPUT_TMDS:
2311                         case DCB_OUTPUT_LVDS:
2312                         case DCB_OUTPUT_DP:
2313                                 ret = nv50_sor_create(connector, dcbe);
2314                                 break;
2315                         case DCB_OUTPUT_ANALOG:
2316                                 ret = nv50_dac_create(connector, dcbe);
2317                                 break;
2318                         default:
2319                                 ret = -ENODEV;
2320                                 break;
2321                         }
2322                 } else {
2323                         ret = nv50_pior_create(connector, dcbe);
2324                 }
2325
2326                 if (ret) {
2327                         NV_WARN(drm, "failed to create encoder %d/%d/%d: %d\n",
2328                                      dcbe->location, dcbe->type,
2329                                      ffs(dcbe->or) - 1, ret);
2330                         ret = 0;
2331                 }
2332         }
2333
2334         /* cull any connectors we created that don't have an encoder */
2335         list_for_each_entry_safe(connector, tmp, &dev->mode_config.connector_list, head) {
2336                 if (connector->encoder_ids[0])
2337                         continue;
2338
2339                 NV_WARN(drm, "%s has no encoders, removing\n",
2340                         connector->name);
2341                 connector->funcs->destroy(connector);
2342         }
2343
2344         /* Disable vblank irqs aggressively for power-saving, safe on nv50+ */
2345         dev->vblank_disable_immediate = true;
2346
2347 out:
2348         if (ret)
2349                 nv50_display_destroy(dev);
2350         return ret;
2351 }