linux/drivers/gpu/drm/nouveau/nvkm/engine/disp/base.c
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   1/*
   2 * Copyright 2013 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 "priv.h"
  25#include "conn.h"
  26#include "dp.h"
  27#include "head.h"
  28#include "ior.h"
  29#include "outp.h"
  30
  31#include <core/client.h>
  32#include <core/notify.h>
  33#include <core/oproxy.h>
  34#include <subdev/bios.h>
  35#include <subdev/bios/dcb.h>
  36
  37#include <nvif/class.h>
  38#include <nvif/cl0046.h>
  39#include <nvif/event.h>
  40#include <nvif/unpack.h>
  41
  42static void
  43nvkm_disp_vblank_fini(struct nvkm_event *event, int type, int id)
  44{
  45        struct nvkm_disp *disp = container_of(event, typeof(*disp), vblank);
  46        struct nvkm_head *head = nvkm_head_find(disp, id);
  47        if (head)
  48                head->func->vblank_put(head);
  49}
  50
  51static void
  52nvkm_disp_vblank_init(struct nvkm_event *event, int type, int id)
  53{
  54        struct nvkm_disp *disp = container_of(event, typeof(*disp), vblank);
  55        struct nvkm_head *head = nvkm_head_find(disp, id);
  56        if (head)
  57                head->func->vblank_get(head);
  58}
  59
  60static int
  61nvkm_disp_vblank_ctor(struct nvkm_object *object, void *data, u32 size,
  62                      struct nvkm_notify *notify)
  63{
  64        struct nvkm_disp *disp =
  65                container_of(notify->event, typeof(*disp), vblank);
  66        union {
  67                struct nvif_notify_head_req_v0 v0;
  68        } *req = data;
  69        int ret = -ENOSYS;
  70
  71        if (!(ret = nvif_unpack(ret, &data, &size, req->v0, 0, 0, false))) {
  72                notify->size = sizeof(struct nvif_notify_head_rep_v0);
  73                if (ret = -ENXIO, req->v0.head <= disp->vblank.index_nr) {
  74                        notify->types = 1;
  75                        notify->index = req->v0.head;
  76                        return 0;
  77                }
  78        }
  79
  80        return ret;
  81}
  82
  83static const struct nvkm_event_func
  84nvkm_disp_vblank_func = {
  85        .ctor = nvkm_disp_vblank_ctor,
  86        .init = nvkm_disp_vblank_init,
  87        .fini = nvkm_disp_vblank_fini,
  88};
  89
  90void
  91nvkm_disp_vblank(struct nvkm_disp *disp, int head)
  92{
  93        struct nvif_notify_head_rep_v0 rep = {};
  94        nvkm_event_send(&disp->vblank, 1, head, &rep, sizeof(rep));
  95}
  96
  97static int
  98nvkm_disp_hpd_ctor(struct nvkm_object *object, void *data, u32 size,
  99                   struct nvkm_notify *notify)
 100{
 101        struct nvkm_disp *disp =
 102                container_of(notify->event, typeof(*disp), hpd);
 103        union {
 104                struct nvif_notify_conn_req_v0 v0;
 105        } *req = data;
 106        struct nvkm_outp *outp;
 107        int ret = -ENOSYS;
 108
 109        if (!(ret = nvif_unpack(ret, &data, &size, req->v0, 0, 0, false))) {
 110                notify->size = sizeof(struct nvif_notify_conn_rep_v0);
 111                list_for_each_entry(outp, &disp->outp, head) {
 112                        if (ret = -ENXIO, outp->conn->index == req->v0.conn) {
 113                                if (ret = -ENODEV, outp->conn->hpd.event) {
 114                                        notify->types = req->v0.mask;
 115                                        notify->index = req->v0.conn;
 116                                        ret = 0;
 117                                }
 118                                break;
 119                        }
 120                }
 121        }
 122
 123        return ret;
 124}
 125
 126static const struct nvkm_event_func
 127nvkm_disp_hpd_func = {
 128        .ctor = nvkm_disp_hpd_ctor
 129};
 130
 131int
 132nvkm_disp_ntfy(struct nvkm_object *object, u32 type, struct nvkm_event **event)
 133{
 134        struct nvkm_disp *disp = nvkm_disp(object->engine);
 135        switch (type) {
 136        case NV04_DISP_NTFY_VBLANK:
 137                *event = &disp->vblank;
 138                return 0;
 139        case NV04_DISP_NTFY_CONN:
 140                *event = &disp->hpd;
 141                return 0;
 142        default:
 143                break;
 144        }
 145        return -EINVAL;
 146}
 147
 148static void
 149nvkm_disp_class_del(struct nvkm_oproxy *oproxy)
 150{
 151        struct nvkm_disp *disp = nvkm_disp(oproxy->base.engine);
 152        mutex_lock(&disp->engine.subdev.mutex);
 153        if (disp->client == oproxy)
 154                disp->client = NULL;
 155        mutex_unlock(&disp->engine.subdev.mutex);
 156}
 157
 158static const struct nvkm_oproxy_func
 159nvkm_disp_class = {
 160        .dtor[1] = nvkm_disp_class_del,
 161};
 162
 163static int
 164nvkm_disp_class_new(struct nvkm_device *device,
 165                    const struct nvkm_oclass *oclass, void *data, u32 size,
 166                    struct nvkm_object **pobject)
 167{
 168        const struct nvkm_disp_oclass *sclass = oclass->engn;
 169        struct nvkm_disp *disp = nvkm_disp(oclass->engine);
 170        struct nvkm_oproxy *oproxy;
 171        int ret;
 172
 173        ret = nvkm_oproxy_new_(&nvkm_disp_class, oclass, &oproxy);
 174        if (ret)
 175                return ret;
 176        *pobject = &oproxy->base;
 177
 178        mutex_lock(&disp->engine.subdev.mutex);
 179        if (disp->client) {
 180                mutex_unlock(&disp->engine.subdev.mutex);
 181                return -EBUSY;
 182        }
 183        disp->client = oproxy;
 184        mutex_unlock(&disp->engine.subdev.mutex);
 185
 186        return sclass->ctor(disp, oclass, data, size, &oproxy->object);
 187}
 188
 189static const struct nvkm_device_oclass
 190nvkm_disp_sclass = {
 191        .ctor = nvkm_disp_class_new,
 192};
 193
 194static int
 195nvkm_disp_class_get(struct nvkm_oclass *oclass, int index,
 196                    const struct nvkm_device_oclass **class)
 197{
 198        struct nvkm_disp *disp = nvkm_disp(oclass->engine);
 199        if (index == 0) {
 200                const struct nvkm_disp_oclass *root = disp->func->root(disp);
 201                oclass->base = root->base;
 202                oclass->engn = root;
 203                *class = &nvkm_disp_sclass;
 204                return 0;
 205        }
 206        return 1;
 207}
 208
 209static void
 210nvkm_disp_intr(struct nvkm_engine *engine)
 211{
 212        struct nvkm_disp *disp = nvkm_disp(engine);
 213        disp->func->intr(disp);
 214}
 215
 216static int
 217nvkm_disp_fini(struct nvkm_engine *engine, bool suspend)
 218{
 219        struct nvkm_disp *disp = nvkm_disp(engine);
 220        struct nvkm_conn *conn;
 221        struct nvkm_outp *outp;
 222
 223        if (disp->func->fini)
 224                disp->func->fini(disp);
 225
 226        list_for_each_entry(outp, &disp->outp, head) {
 227                nvkm_outp_fini(outp);
 228        }
 229
 230        list_for_each_entry(conn, &disp->conn, head) {
 231                nvkm_conn_fini(conn);
 232        }
 233
 234        return 0;
 235}
 236
 237static int
 238nvkm_disp_init(struct nvkm_engine *engine)
 239{
 240        struct nvkm_disp *disp = nvkm_disp(engine);
 241        struct nvkm_conn *conn;
 242        struct nvkm_outp *outp;
 243        struct nvkm_ior *ior;
 244
 245        list_for_each_entry(conn, &disp->conn, head) {
 246                nvkm_conn_init(conn);
 247        }
 248
 249        list_for_each_entry(outp, &disp->outp, head) {
 250                nvkm_outp_init(outp);
 251        }
 252
 253        if (disp->func->init) {
 254                int ret = disp->func->init(disp);
 255                if (ret)
 256                        return ret;
 257        }
 258
 259        /* Set 'normal' (ie. when it's attached to a head) state for
 260         * each output resource to 'fully enabled'.
 261         */
 262        list_for_each_entry(ior, &disp->ior, head) {
 263                ior->func->power(ior, true, true, true, true, true);
 264        }
 265
 266        return 0;
 267}
 268
 269static int
 270nvkm_disp_oneinit(struct nvkm_engine *engine)
 271{
 272        struct nvkm_disp *disp = nvkm_disp(engine);
 273        struct nvkm_subdev *subdev = &disp->engine.subdev;
 274        struct nvkm_bios *bios = subdev->device->bios;
 275        struct nvkm_outp *outp, *outt, *pair;
 276        struct nvkm_conn *conn;
 277        struct nvkm_head *head;
 278        struct nvkm_ior *ior;
 279        struct nvbios_connE connE;
 280        struct dcb_output dcbE;
 281        u8  hpd = 0, ver, hdr;
 282        u32 data;
 283        int ret, i;
 284
 285        /* Create output path objects for each VBIOS display path. */
 286        i = -1;
 287        while ((data = dcb_outp_parse(bios, ++i, &ver, &hdr, &dcbE))) {
 288                if (ver < 0x40) /* No support for chipsets prior to NV50. */
 289                        break;
 290                if (dcbE.type == DCB_OUTPUT_UNUSED)
 291                        continue;
 292                if (dcbE.type == DCB_OUTPUT_EOL)
 293                        break;
 294                outp = NULL;
 295
 296                switch (dcbE.type) {
 297                case DCB_OUTPUT_ANALOG:
 298                case DCB_OUTPUT_TV:
 299                case DCB_OUTPUT_TMDS:
 300                case DCB_OUTPUT_LVDS:
 301                        ret = nvkm_outp_new(disp, i, &dcbE, &outp);
 302                        break;
 303                case DCB_OUTPUT_DP:
 304                        ret = nvkm_dp_new(disp, i, &dcbE, &outp);
 305                        break;
 306                case DCB_OUTPUT_WFD:
 307                        /* No support for WFD yet. */
 308                        ret = -ENODEV;
 309                        continue;
 310                default:
 311                        nvkm_warn(subdev, "dcb %d type %d unknown\n",
 312                                  i, dcbE.type);
 313                        continue;
 314                }
 315
 316                if (ret) {
 317                        if (outp) {
 318                                if (ret != -ENODEV)
 319                                        OUTP_ERR(outp, "ctor failed: %d", ret);
 320                                else
 321                                        OUTP_DBG(outp, "not supported");
 322                                nvkm_outp_del(&outp);
 323                                continue;
 324                        }
 325                        nvkm_error(subdev, "failed to create outp %d\n", i);
 326                        continue;
 327                }
 328
 329                list_add_tail(&outp->head, &disp->outp);
 330                hpd = max(hpd, (u8)(dcbE.connector + 1));
 331        }
 332
 333        /* Create connector objects based on available output paths. */
 334        list_for_each_entry_safe(outp, outt, &disp->outp, head) {
 335                /* VBIOS data *should* give us the most useful information. */
 336                data = nvbios_connEp(bios, outp->info.connector, &ver, &hdr,
 337                                     &connE);
 338
 339                /* No bios connector data... */
 340                if (!data) {
 341                        /* Heuristic: anything with the same ccb index is
 342                         * considered to be on the same connector, any
 343                         * output path without an associated ccb entry will
 344                         * be put on its own connector.
 345                         */
 346                        int ccb_index = outp->info.i2c_index;
 347                        if (ccb_index != 0xf) {
 348                                list_for_each_entry(pair, &disp->outp, head) {
 349                                        if (pair->info.i2c_index == ccb_index) {
 350                                                outp->conn = pair->conn;
 351                                                break;
 352                                        }
 353                                }
 354                        }
 355
 356                        /* Connector shared with another output path. */
 357                        if (outp->conn)
 358                                continue;
 359
 360                        memset(&connE, 0x00, sizeof(connE));
 361                        connE.type = DCB_CONNECTOR_NONE;
 362                        i = -1;
 363                } else {
 364                        i = outp->info.connector;
 365                }
 366
 367                /* Check that we haven't already created this connector. */
 368                list_for_each_entry(conn, &disp->conn, head) {
 369                        if (conn->index == outp->info.connector) {
 370                                outp->conn = conn;
 371                                break;
 372                        }
 373                }
 374
 375                if (outp->conn)
 376                        continue;
 377
 378                /* Apparently we need to create a new one! */
 379                ret = nvkm_conn_new(disp, i, &connE, &outp->conn);
 380                if (ret) {
 381                        nvkm_error(&disp->engine.subdev,
 382                                   "failed to create outp %d conn: %d\n",
 383                                   outp->index, ret);
 384                        nvkm_conn_del(&outp->conn);
 385                        list_del(&outp->head);
 386                        nvkm_outp_del(&outp);
 387                        continue;
 388                }
 389
 390                list_add_tail(&outp->conn->head, &disp->conn);
 391        }
 392
 393        ret = nvkm_event_init(&nvkm_disp_hpd_func, 3, hpd, &disp->hpd);
 394        if (ret)
 395                return ret;
 396
 397        if (disp->func->oneinit) {
 398                ret = disp->func->oneinit(disp);
 399                if (ret)
 400                        return ret;
 401        }
 402
 403        /* Enforce identity-mapped SOR assignment for panels, which have
 404         * certain bits (ie. backlight controls) wired to a specific SOR.
 405         */
 406        list_for_each_entry(outp, &disp->outp, head) {
 407                if (outp->conn->info.type == DCB_CONNECTOR_LVDS ||
 408                    outp->conn->info.type == DCB_CONNECTOR_eDP) {
 409                        ior = nvkm_ior_find(disp, SOR, ffs(outp->info.or) - 1);
 410                        if (!WARN_ON(!ior))
 411                                ior->identity = true;
 412                        outp->identity = true;
 413                }
 414        }
 415
 416        i = 0;
 417        list_for_each_entry(head, &disp->head, head)
 418                i = max(i, head->id + 1);
 419
 420        return nvkm_event_init(&nvkm_disp_vblank_func, 1, i, &disp->vblank);
 421}
 422
 423static void *
 424nvkm_disp_dtor(struct nvkm_engine *engine)
 425{
 426        struct nvkm_disp *disp = nvkm_disp(engine);
 427        struct nvkm_conn *conn;
 428        struct nvkm_outp *outp;
 429        void *data = disp;
 430
 431        if (disp->func->dtor)
 432                data = disp->func->dtor(disp);
 433
 434        nvkm_event_fini(&disp->vblank);
 435        nvkm_event_fini(&disp->hpd);
 436
 437        while (!list_empty(&disp->conn)) {
 438                conn = list_first_entry(&disp->conn, typeof(*conn), head);
 439                list_del(&conn->head);
 440                nvkm_conn_del(&conn);
 441        }
 442
 443        while (!list_empty(&disp->outp)) {
 444                outp = list_first_entry(&disp->outp, typeof(*outp), head);
 445                list_del(&outp->head);
 446                nvkm_outp_del(&outp);
 447        }
 448
 449        while (!list_empty(&disp->ior)) {
 450                struct nvkm_ior *ior =
 451                        list_first_entry(&disp->ior, typeof(*ior), head);
 452                nvkm_ior_del(&ior);
 453        }
 454
 455        while (!list_empty(&disp->head)) {
 456                struct nvkm_head *head =
 457                        list_first_entry(&disp->head, typeof(*head), head);
 458                nvkm_head_del(&head);
 459        }
 460
 461        return data;
 462}
 463
 464static const struct nvkm_engine_func
 465nvkm_disp = {
 466        .dtor = nvkm_disp_dtor,
 467        .oneinit = nvkm_disp_oneinit,
 468        .init = nvkm_disp_init,
 469        .fini = nvkm_disp_fini,
 470        .intr = nvkm_disp_intr,
 471        .base.sclass = nvkm_disp_class_get,
 472};
 473
 474int
 475nvkm_disp_ctor(const struct nvkm_disp_func *func, struct nvkm_device *device,
 476               int index, struct nvkm_disp *disp)
 477{
 478        disp->func = func;
 479        INIT_LIST_HEAD(&disp->head);
 480        INIT_LIST_HEAD(&disp->ior);
 481        INIT_LIST_HEAD(&disp->outp);
 482        INIT_LIST_HEAD(&disp->conn);
 483        return nvkm_engine_ctor(&nvkm_disp, device, index, true, &disp->engine);
 484}
 485
 486int
 487nvkm_disp_new_(const struct nvkm_disp_func *func, struct nvkm_device *device,
 488               int index, struct nvkm_disp **pdisp)
 489{
 490        if (!(*pdisp = kzalloc(sizeof(**pdisp), GFP_KERNEL)))
 491                return -ENOMEM;
 492        return nvkm_disp_ctor(func, device, index, *pdisp);
 493}
 494