drivers/media/platform/exynos4-is/media-dev.c

   1 /*
   2  * S5P/EXYNOS4 SoC series camera host interface media device driver
   3  *
   4  * Copyright (C) 2011 - 2013 Samsung Electronics Co., Ltd.
   5  * Author: Sylwester Nawrocki <s.nawrocki@samsung.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published
   9  * by the Free Software Foundation, either version 2 of the License,
  10  * or (at your option) any later version.
  11  */
  12
  13 #include <linux/bug.h>
  14 #include <linux/clk.h>
  15 #include <linux/clk-provider.h>
  16 #include <linux/device.h>
  17 #include <linux/errno.h>
  18 #include <linux/i2c.h>
  19 #include <linux/kernel.h>
  20 #include <linux/list.h>
  21 #include <linux/module.h>
  22 #include <linux/of.h>
  23 #include <linux/of_platform.h>
  24 #include <linux/of_device.h>
  25 #include <linux/of_graph.h>
  26 #include <linux/platform_device.h>
  27 #include <linux/pm_runtime.h>
  28 #include <linux/types.h>
  29 #include <linux/slab.h>
  30 #include <media/v4l2-async.h>
  31 #include <media/v4l2-ctrls.h>
  32 #include <media/v4l2-fwnode.h>
  33 #include <media/media-device.h>
  34 #include <media/drv-intf/exynos-fimc.h>
  35
  36 #include "media-dev.h"
  37 #include "fimc-core.h"
  38 #include "fimc-is.h"
  39 #include "fimc-lite.h"
  40 #include "mipi-csis.h"
  41
  42 /* Set up image sensor subdev -> FIMC capture node notifications. */
  43 static void __setup_sensor_notification(struct fimc_md *fmd,
  44                                         struct v4l2_subdev *sensor,
  45                                         struct v4l2_subdev *fimc_sd)
  46 {
  47         struct fimc_source_info *src_inf;
  48         struct fimc_sensor_info *md_si;
  49         unsigned long flags;
  50
  51         src_inf = v4l2_get_subdev_hostdata(sensor);
  52         if (!src_inf || WARN_ON(fmd == NULL))
  53                 return;
  54
  55         md_si = source_to_sensor_info(src_inf);
  56         spin_lock_irqsave(&fmd->slock, flags);
  57         md_si->host = v4l2_get_subdevdata(fimc_sd);
  58         spin_unlock_irqrestore(&fmd->slock, flags);
  59 }
  60
  61 /**
  62  * fimc_pipeline_prepare - update pipeline information with subdevice pointers
  63  * @p: fimc pipeline
  64  * @me: media entity terminating the pipeline
  65  *
  66  * Caller holds the graph mutex.
  67  */
  68 static void fimc_pipeline_prepare(struct fimc_pipeline *p,
  69                                         struct media_entity *me)
  70 {
  71         struct fimc_md *fmd = entity_to_fimc_mdev(me);
  72         struct v4l2_subdev *sd;
  73         struct v4l2_subdev *sensor = NULL;
  74         int i;
  75
  76         for (i = 0; i < IDX_MAX; i++)
  77                 p->subdevs[i] = NULL;
  78
  79         while (1) {
  80                 struct media_pad *pad = NULL;
  81
  82                 /* Find remote source pad */
  83                 for (i = 0; i < me->num_pads; i++) {
  84                         struct media_pad *spad = &me->pads[i];
  85                         if (!(spad->flags & MEDIA_PAD_FL_SINK))
  86                                 continue;
  87                         pad = media_entity_remote_pad(spad);
  88                         if (pad)
  89                                 break;
  90                 }
  91
  92                 if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
  93                         break;
  94                 sd = media_entity_to_v4l2_subdev(pad->entity);
  95
  96                 switch (sd->grp_id) {
  97                 case GRP_ID_SENSOR:
  98                         sensor = sd;
  99                         /* fall through */
 100                 case GRP_ID_FIMC_IS_SENSOR:
 101                         p->subdevs[IDX_SENSOR] = sd;
 102                         break;
 103                 case GRP_ID_CSIS:
 104                         p->subdevs[IDX_CSIS] = sd;
 105                         break;
 106                 case GRP_ID_FLITE:
 107                         p->subdevs[IDX_FLITE] = sd;
 108                         break;
 109                 case GRP_ID_FIMC:
 110                         p->subdevs[IDX_FIMC] = sd;
 111                         break;
 112                 case GRP_ID_FIMC_IS:
 113                         p->subdevs[IDX_IS_ISP] = sd;
 114                         break;
 115                 default:
 116                         break;
 117                 }
 118                 me = &sd->entity;
 119                 if (me->num_pads == 1)
 120                         break;
 121         }
 122
 123         if (sensor && p->subdevs[IDX_FIMC])
 124                 __setup_sensor_notification(fmd, sensor, p->subdevs[IDX_FIMC]);
 125 }
 126
 127 /**
 128  * __subdev_set_power - change power state of a single subdev
 129  * @sd: subdevice to change power state for
 130  * @on: 1 to enable power or 0 to disable
 131  *
 132  * Return result of s_power subdev operation or -ENXIO if sd argument
 133  * is NULL. Return 0 if the subdevice does not implement s_power.
 134  */
 135 static int __subdev_set_power(struct v4l2_subdev *sd, int on)
 136 {
 137         int *use_count;
 138         int ret;
 139
 140         if (sd == NULL)
 141                 return -ENXIO;
 142
 143         use_count = &sd->entity.use_count;
 144         if (on && (*use_count)++ > 0)
 145                 return 0;
 146         else if (!on && (*use_count == 0 || --(*use_count) > 0))
 147                 return 0;
 148         ret = v4l2_subdev_call(sd, core, s_power, on);
 149
 150         return ret != -ENOIOCTLCMD ? ret : 0;
 151 }
 152
 153 /**
 154  * fimc_pipeline_s_power - change power state of all pipeline subdevs
 155  * @p: fimc device terminating the pipeline
 156  * @on: true to power on, false to power off
 157  *
 158  * Needs to be called with the graph mutex held.
 159  */
 160 static int fimc_pipeline_s_power(struct fimc_pipeline *p, bool on)
 161 {
 162         static const u8 seq[2][IDX_MAX - 1] = {
 163                 { IDX_IS_ISP, IDX_SENSOR, IDX_CSIS, IDX_FLITE },
 164                 { IDX_CSIS, IDX_FLITE, IDX_SENSOR, IDX_IS_ISP },
 165         };
 166         int i, ret = 0;
 167
 168         if (p->subdevs[IDX_SENSOR] == NULL)
 169                 return -ENXIO;
 170
 171         for (i = 0; i < IDX_MAX - 1; i++) {
 172                 unsigned int idx = seq[on][i];
 173
 174                 ret = __subdev_set_power(p->subdevs[idx], on);
 175
 176
 177                 if (ret < 0 && ret != -ENXIO)
 178                         goto error;
 179         }
 180         return 0;
 181 error:
 182         for (; i >= 0; i--) {
 183                 unsigned int idx = seq[on][i];
 184                 __subdev_set_power(p->subdevs[idx], !on);
 185         }
 186         return ret;
 187 }
 188
 189 /**
 190  * __fimc_pipeline_enable - enable power of all pipeline subdevs
 191  *                          and the sensor clock
 192  * @ep: video pipeline structure
 193  * @fmd: fimc media device
 194  *
 195  * Called with the graph mutex held.
 196  */
 197 static int __fimc_pipeline_enable(struct exynos_media_pipeline *ep,
 198                                   struct fimc_md *fmd)
 199 {
 200         struct fimc_pipeline *p = to_fimc_pipeline(ep);
 201         int ret;
 202
 203         /* Enable PXLASYNC clock if this pipeline includes FIMC-IS */
 204         if (!IS_ERR(fmd->wbclk[CLK_IDX_WB_B]) && p->subdevs[IDX_IS_ISP]) {
 205                 ret = clk_prepare_enable(fmd->wbclk[CLK_IDX_WB_B]);
 206                 if (ret < 0)
 207                         return ret;
 208         }
 209
 210         ret = fimc_pipeline_s_power(p, 1);
 211         if (!ret)
 212                 return 0;
 213
 214         if (!IS_ERR(fmd->wbclk[CLK_IDX_WB_B]) && p->subdevs[IDX_IS_ISP])
 215                 clk_disable_unprepare(fmd->wbclk[CLK_IDX_WB_B]);
 216
 217         return ret;
 218 }
 219
 220 /**
 221  * __fimc_pipeline_open - update the pipeline information, enable power
 222  *                        of all pipeline subdevs and the sensor clock
 223  * @ep: fimc device terminating the pipeline
 224  * @me: media entity to start graph walk with
 225  * @prepare: true to walk the current pipeline and acquire all subdevs
 226  *
 227  * Called with the graph mutex held.
 228  */
 229 static int __fimc_pipeline_open(struct exynos_media_pipeline *ep,
 230                                 struct media_entity *me, bool prepare)
 231 {
 232         struct fimc_md *fmd = entity_to_fimc_mdev(me);
 233         struct fimc_pipeline *p = to_fimc_pipeline(ep);
 234         struct v4l2_subdev *sd;
 235
 236         if (WARN_ON(p == NULL || me == NULL))
 237                 return -EINVAL;
 238
 239         if (prepare)
 240                 fimc_pipeline_prepare(p, me);
 241
 242         sd = p->subdevs[IDX_SENSOR];
 243         if (sd == NULL) {
 244                 pr_warn("%s(): No sensor subdev\n", __func__);
 245                 /*
 246                  * Pipeline open cannot fail so as to make it possible
 247                  * for the user space to configure the pipeline.
 248                  */
 249                 return 0;
 250         }
 251
 252         return __fimc_pipeline_enable(ep, fmd);
 253 }
 254
 255 /**
 256  * __fimc_pipeline_close - disable the sensor clock and pipeline power
 257  * @ep: fimc device terminating the pipeline
 258  *
 259  * Disable power of all subdevs and turn the external sensor clock off.
 260  */
 261 static int __fimc_pipeline_close(struct exynos_media_pipeline *ep)
 262 {
 263         struct fimc_pipeline *p = to_fimc_pipeline(ep);
 264         struct v4l2_subdev *sd = p ? p->subdevs[IDX_SENSOR] : NULL;
 265         struct fimc_md *fmd;
 266         int ret;
 267
 268         if (sd == NULL) {
 269                 pr_warn("%s(): No sensor subdev\n", __func__);
 270                 return 0;
 271         }
 272
 273         ret = fimc_pipeline_s_power(p, 0);
 274
 275         fmd = entity_to_fimc_mdev(&sd->entity);
 276
 277         /* Disable PXLASYNC clock if this pipeline includes FIMC-IS */
 278         if (!IS_ERR(fmd->wbclk[CLK_IDX_WB_B]) && p->subdevs[IDX_IS_ISP])
 279                 clk_disable_unprepare(fmd->wbclk[CLK_IDX_WB_B]);
 280
 281         return ret == -ENXIO ? 0 : ret;
 282 }
 283
 284 /**
 285  * __fimc_pipeline_s_stream - call s_stream() on pipeline subdevs
 286  * @ep: video pipeline structure
 287  * @on: passed as the s_stream() callback argument
 288  */
 289 static int __fimc_pipeline_s_stream(struct exynos_media_pipeline *ep, bool on)
 290 {
 291         static const u8 seq[2][IDX_MAX] = {
 292                 { IDX_FIMC, IDX_SENSOR, IDX_IS_ISP, IDX_CSIS, IDX_FLITE },
 293                 { IDX_CSIS, IDX_FLITE, IDX_FIMC, IDX_SENSOR, IDX_IS_ISP },
 294         };
 295         struct fimc_pipeline *p = to_fimc_pipeline(ep);
 296         struct fimc_md *fmd = entity_to_fimc_mdev(&p->subdevs[IDX_CSIS]->entity);
 297         enum fimc_subdev_index sd_id;
 298         int i, ret = 0;
 299
 300         if (p->subdevs[IDX_SENSOR] == NULL) {
 301                 if (!fmd->user_subdev_api) {
 302                         /*
 303                          * Sensor must be already discovered if we
 304                          * aren't in the user_subdev_api mode
 305                          */
 306                         return -ENODEV;
 307                 }
 308
 309                 /* Get pipeline sink entity */
 310                 if (p->subdevs[IDX_FIMC])
 311                         sd_id = IDX_FIMC;
 312                 else if (p->subdevs[IDX_IS_ISP])
 313                         sd_id = IDX_IS_ISP;
 314                 else if (p->subdevs[IDX_FLITE])
 315                         sd_id = IDX_FLITE;
 316                 else
 317                         return -ENODEV;
 318
 319                 /*
 320                  * Sensor could have been linked between open and STREAMON -
 321                  * check if this is the case.
 322                  */
 323                 fimc_pipeline_prepare(p, &p->subdevs[sd_id]->entity);
 324
 325                 if (p->subdevs[IDX_SENSOR] == NULL)
 326                         return -ENODEV;
 327
 328                 ret = __fimc_pipeline_enable(ep, fmd);
 329                 if (ret < 0)
 330                         return ret;
 331
 332         }
 333
 334         for (i = 0; i < IDX_MAX; i++) {
 335                 unsigned int idx = seq[on][i];
 336
 337                 ret = v4l2_subdev_call(p->subdevs[idx], video, s_stream, on);
 338
 339                 if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV)
 340                         goto error;
 341         }
 342
 343         return 0;
 344 error:
 345         fimc_pipeline_s_power(p, !on);
 346         for (; i >= 0; i--) {
 347                 unsigned int idx = seq[on][i];
 348                 v4l2_subdev_call(p->subdevs[idx], video, s_stream, !on);
 349         }
 350         return ret;
 351 }
 352
 353 /* Media pipeline operations for the FIMC/FIMC-LITE video device driver */
 354 static const struct exynos_media_pipeline_ops fimc_pipeline_ops = {
 355         .open           = __fimc_pipeline_open,
 356         .close          = __fimc_pipeline_close,
 357         .set_stream     = __fimc_pipeline_s_stream,
 358 };
 359
 360 static struct exynos_media_pipeline *fimc_md_pipeline_create(
 361                                                 struct fimc_md *fmd)
 362 {
 363         struct fimc_pipeline *p;
 364
 365         p = kzalloc(sizeof(*p), GFP_KERNEL);
 366         if (!p)
 367                 return NULL;
 368
 369         list_add_tail(&p->list, &fmd->pipelines);
 370
 371         p->ep.ops = &fimc_pipeline_ops;
 372         return &p->ep;
 373 }
 374
 375 static void fimc_md_pipelines_free(struct fimc_md *fmd)
 376 {
 377         while (!list_empty(&fmd->pipelines)) {
 378                 struct fimc_pipeline *p;
 379
 380                 p = list_entry(fmd->pipelines.next, typeof(*p), list);
 381                 list_del(&p->list);
 382                 kfree(p);
 383         }
 384 }
 385
 386 /* Parse port node and register as a sub-device any sensor specified there. */
 387 static int fimc_md_parse_port_node(struct fimc_md *fmd,
 388                                    struct device_node *port,
 389                                    unsigned int index)
 390 {
 391         struct fimc_source_info *pd = &fmd->sensor[index].pdata;
 392         struct device_node *rem, *ep, *np;
 393         struct v4l2_fwnode_endpoint endpoint;
 394         int ret;
 395
 396         /* Assume here a port node can have only one endpoint node. */
 397         ep = of_get_next_child(port, NULL);
 398         if (!ep)
 399                 return 0;
 400
 401         ret = v4l2_fwnode_endpoint_parse(of_fwnode_handle(ep), &endpoint);
 402         if (ret) {
 403                 of_node_put(ep);
 404                 return ret;
 405         }
 406
 407         if (WARN_ON(endpoint.base.port == 0) || index >= FIMC_MAX_SENSORS) {
 408                 of_node_put(ep);
 409                 return -EINVAL;
 410         }
 411
 412         pd->mux_id = (endpoint.base.port - 1) & 0x1;
 413
 414         rem = of_graph_get_remote_port_parent(ep);
 415         of_node_put(ep);
 416         if (rem == NULL) {
 417                 v4l2_info(&fmd->v4l2_dev, "Remote device at %pOF not found\n",
 418                                                         ep);
 419                 return 0;
 420         }
 421
 422         if (fimc_input_is_parallel(endpoint.base.port)) {
 423                 if (endpoint.bus_type == V4L2_MBUS_PARALLEL)
 424                         pd->sensor_bus_type = FIMC_BUS_TYPE_ITU_601;
 425                 else
 426                         pd->sensor_bus_type = FIMC_BUS_TYPE_ITU_656;
 427                 pd->flags = endpoint.bus.parallel.flags;
 428         } else if (fimc_input_is_mipi_csi(endpoint.base.port)) {
 429                 /*
 430                  * MIPI CSI-2: only input mux selection and
 431                  * the sensor's clock frequency is needed.
 432                  */
 433                 pd->sensor_bus_type = FIMC_BUS_TYPE_MIPI_CSI2;
 434         } else {
 435                 v4l2_err(&fmd->v4l2_dev, "Wrong port id (%u) at node %pOF\n",
 436                          endpoint.base.port, rem);
 437         }
 438         /*
 439          * For FIMC-IS handled sensors, that are placed under i2c-isp device
 440          * node, FIMC is connected to the FIMC-IS through its ISP Writeback
 441          * input. Sensors are attached to the FIMC-LITE hostdata interface
 442          * directly or through MIPI-CSIS, depending on the external media bus
 443          * used. This needs to be handled in a more reliable way, not by just
 444          * checking parent's node name.
 445          */
 446         np = of_get_parent(rem);
 447
 448         if (np && !of_node_cmp(np->name, "i2c-isp"))
 449                 pd->fimc_bus_type = FIMC_BUS_TYPE_ISP_WRITEBACK;
 450         else
 451                 pd->fimc_bus_type = pd->sensor_bus_type;
 452
 453         if (WARN_ON(index >= ARRAY_SIZE(fmd->sensor))) {
 454                 of_node_put(rem);
 455                 return -EINVAL;
 456         }
 457
 458         fmd->sensor[index].asd.match_type = V4L2_ASYNC_MATCH_FWNODE;
 459         fmd->sensor[index].asd.match.fwnode = of_fwnode_handle(rem);
 460         fmd->async_subdevs[index] = &fmd->sensor[index].asd;
 461
 462         fmd->num_sensors++;
 463
 464         of_node_put(rem);
 465         return 0;
 466 }
 467
 468 /* Register all SoC external sub-devices */
 469 static int fimc_md_register_sensor_entities(struct fimc_md *fmd)
 470 {
 471         struct device_node *parent = fmd->pdev->dev.of_node;
 472         struct device_node *node, *ports;
 473         int index = 0;
 474         int ret;
 475
 476         /*
 477          * Runtime resume one of the FIMC entities to make sure
 478          * the sclk_cam clocks are not globally disabled.
 479          */
 480         if (!fmd->pmf)
 481                 return -ENXIO;
 482
 483         ret = pm_runtime_get_sync(fmd->pmf);
 484         if (ret < 0)
 485                 return ret;
 486
 487         fmd->num_sensors = 0;
 488
 489         /* Attach sensors linked to MIPI CSI-2 receivers */
 490         for_each_available_child_of_node(parent, node) {
 491                 struct device_node *port;
 492
 493                 if (of_node_cmp(node->name, "csis"))
 494                         continue;
 495                 /* The csis node can have only port subnode. */
 496                 port = of_get_next_child(node, NULL);
 497                 if (!port)
 498                         continue;
 499
 500                 ret = fimc_md_parse_port_node(fmd, port, index);
 501                 if (ret < 0) {
 502                         of_node_put(node);
 503                         goto rpm_put;
 504                 }
 505                 index++;
 506         }
 507
 508         /* Attach sensors listed in the parallel-ports node */
 509         ports = of_get_child_by_name(parent, "parallel-ports");
 510         if (!ports)
 511                 goto rpm_put;
 512
 513         for_each_child_of_node(ports, node) {
 514                 ret = fimc_md_parse_port_node(fmd, node, index);
 515                 if (ret < 0) {
 516                         of_node_put(node);
 517                         break;
 518                 }
 519                 index++;
 520         }
 521 rpm_put:
 522         pm_runtime_put(fmd->pmf);
 523         return ret;
 524 }
 525
 526 static int __of_get_csis_id(struct device_node *np)
 527 {
 528         u32 reg = 0;
 529
 530         np = of_get_child_by_name(np, "port");
 531         if (!np)
 532                 return -EINVAL;
 533         of_property_read_u32(np, "reg", &reg);
 534         return reg - FIMC_INPUT_MIPI_CSI2_0;
 535 }
 536
 537 /*
 538  * MIPI-CSIS, FIMC and FIMC-LITE platform devices registration.
 539  */
 540 static int register_fimc_lite_entity(struct fimc_md *fmd,
 541                                      struct fimc_lite *fimc_lite)
 542 {
 543         struct v4l2_subdev *sd;
 544         struct exynos_media_pipeline *ep;
 545         int ret;
 546
 547         if (WARN_ON(fimc_lite->index >= FIMC_LITE_MAX_DEVS ||
 548                     fmd->fimc_lite[fimc_lite->index]))
 549                 return -EBUSY;
 550
 551         sd = &fimc_lite->subdev;
 552         sd->grp_id = GRP_ID_FLITE;
 553
 554         ep = fimc_md_pipeline_create(fmd);
 555         if (!ep)
 556                 return -ENOMEM;
 557
 558         v4l2_set_subdev_hostdata(sd, ep);
 559
 560         ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd);
 561         if (!ret)
 562                 fmd->fimc_lite[fimc_lite->index] = fimc_lite;
 563         else
 564                 v4l2_err(&fmd->v4l2_dev, "Failed to register FIMC.LITE%d\n",
 565                          fimc_lite->index);
 566         return ret;
 567 }
 568
 569 static int register_fimc_entity(struct fimc_md *fmd, struct fimc_dev *fimc)
 570 {
 571         struct v4l2_subdev *sd;
 572         struct exynos_media_pipeline *ep;
 573         int ret;
 574
 575         if (WARN_ON(fimc->id >= FIMC_MAX_DEVS || fmd->fimc[fimc->id]))
 576                 return -EBUSY;
 577
 578         sd = &fimc->vid_cap.subdev;
 579         sd->grp_id = GRP_ID_FIMC;
 580
 581         ep = fimc_md_pipeline_create(fmd);
 582         if (!ep)
 583                 return -ENOMEM;
 584
 585         v4l2_set_subdev_hostdata(sd, ep);
 586
 587         ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd);
 588         if (!ret) {
 589                 if (!fmd->pmf && fimc->pdev)
 590                         fmd->pmf = &fimc->pdev->dev;
 591                 fmd->fimc[fimc->id] = fimc;
 592                 fimc->vid_cap.user_subdev_api = fmd->user_subdev_api;
 593         } else {
 594                 v4l2_err(&fmd->v4l2_dev, "Failed to register FIMC.%d (%d)\n",
 595                          fimc->id, ret);
 596         }
 597         return ret;
 598 }
 599
 600 static int register_csis_entity(struct fimc_md *fmd,
 601                                 struct platform_device *pdev,
 602                                 struct v4l2_subdev *sd)
 603 {
 604         struct device_node *node = pdev->dev.of_node;
 605         int id, ret;
 606
 607         id = node ? __of_get_csis_id(node) : max(0, pdev->id);
 608
 609         if (WARN_ON(id < 0 || id >= CSIS_MAX_ENTITIES))
 610                 return -ENOENT;
 611
 612         if (WARN_ON(fmd->csis[id].sd))
 613                 return -EBUSY;
 614
 615         sd->grp_id = GRP_ID_CSIS;
 616         ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd);
 617         if (!ret)
 618                 fmd->csis[id].sd = sd;
 619         else
 620                 v4l2_err(&fmd->v4l2_dev,
 621                          "Failed to register MIPI-CSIS.%d (%d)\n", id, ret);
 622         return ret;
 623 }
 624
 625 static int register_fimc_is_entity(struct fimc_md *fmd, struct fimc_is *is)
 626 {
 627         struct v4l2_subdev *sd = &is->isp.subdev;
 628         struct exynos_media_pipeline *ep;
 629         int ret;
 630
 631         /* Allocate pipeline object for the ISP capture video node. */
 632         ep = fimc_md_pipeline_create(fmd);
 633         if (!ep)
 634                 return -ENOMEM;
 635
 636         v4l2_set_subdev_hostdata(sd, ep);
 637
 638         ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd);
 639         if (ret) {
 640                 v4l2_err(&fmd->v4l2_dev,
 641                          "Failed to register FIMC-ISP (%d)\n", ret);
 642                 return ret;
 643         }
 644
 645         fmd->fimc_is = is;
 646         return 0;
 647 }
 648
 649 static int fimc_md_register_platform_entity(struct fimc_md *fmd,
 650                                             struct platform_device *pdev,
 651                                             int plat_entity)
 652 {
 653         struct device *dev = &pdev->dev;
 654         int ret = -EPROBE_DEFER;
 655         void *drvdata;
 656
 657         /* Lock to ensure dev->driver won't change. */
 658         device_lock(dev);
 659
 660         if (!dev->driver || !try_module_get(dev->driver->owner))
 661                 goto dev_unlock;
 662
 663         drvdata = dev_get_drvdata(dev);
 664         /* Some subdev didn't probe successfully id drvdata is NULL */
 665         if (drvdata) {
 666                 switch (plat_entity) {
 667                 case IDX_FIMC:
 668                         ret = register_fimc_entity(fmd, drvdata);
 669                         break;
 670                 case IDX_FLITE:
 671                         ret = register_fimc_lite_entity(fmd, drvdata);
 672                         break;
 673                 case IDX_CSIS:
 674                         ret = register_csis_entity(fmd, pdev, drvdata);
 675                         break;
 676                 case IDX_IS_ISP:
 677                         ret = register_fimc_is_entity(fmd, drvdata);
 678                         break;
 679                 default:
 680                         ret = -ENODEV;
 681                 }
 682         }
 683
 684         module_put(dev->driver->owner);
 685 dev_unlock:
 686         device_unlock(dev);
 687         if (ret == -EPROBE_DEFER)
 688                 dev_info(&fmd->pdev->dev, "deferring %s device registration\n",
 689                         dev_name(dev));
 690         else if (ret < 0)
 691                 dev_err(&fmd->pdev->dev, "%s device registration failed (%d)\n",
 692                         dev_name(dev), ret);
 693         return ret;
 694 }
 695
 696 /* Register FIMC, FIMC-LITE and CSIS media entities */
 697 static int fimc_md_register_platform_entities(struct fimc_md *fmd,
 698                                               struct device_node *parent)
 699 {
 700         struct device_node *node;
 701         int ret = 0;
 702
 703         for_each_available_child_of_node(parent, node) {
 704                 struct platform_device *pdev;
 705                 int plat_entity = -1;
 706
 707                 pdev = of_find_device_by_node(node);
 708                 if (!pdev)
 709                         continue;
 710
 711                 /* If driver of any entity isn't ready try all again later. */
 712                 if (!strcmp(node->name, CSIS_OF_NODE_NAME))
 713                         plat_entity = IDX_CSIS;
 714                 else if (!strcmp(node->name, FIMC_IS_OF_NODE_NAME))
 715                         plat_entity = IDX_IS_ISP;
 716                 else if (!strcmp(node->name, FIMC_LITE_OF_NODE_NAME))
 717                         plat_entity = IDX_FLITE;
 718                 else if (!strcmp(node->name, FIMC_OF_NODE_NAME) &&
 719                          !of_property_read_bool(node, "samsung,lcd-wb"))
 720                         plat_entity = IDX_FIMC;
 721
 722                 if (plat_entity >= 0)
 723                         ret = fimc_md_register_platform_entity(fmd, pdev,
 724                                                         plat_entity);
 725                 put_device(&pdev->dev);
 726                 if (ret < 0) {
 727                         of_node_put(node);
 728                         break;
 729                 }
 730         }
 731
 732         return ret;
 733 }
 734
 735 static void fimc_md_unregister_entities(struct fimc_md *fmd)
 736 {
 737         int i;
 738
 739         for (i = 0; i < FIMC_MAX_DEVS; i++) {
 740                 struct fimc_dev *dev = fmd->fimc[i];
 741                 if (dev == NULL)
 742                         continue;
 743                 v4l2_device_unregister_subdev(&dev->vid_cap.subdev);
 744                 dev->vid_cap.ve.pipe = NULL;
 745                 fmd->fimc[i] = NULL;
 746         }
 747         for (i = 0; i < FIMC_LITE_MAX_DEVS; i++) {
 748                 struct fimc_lite *dev = fmd->fimc_lite[i];
 749                 if (dev == NULL)
 750                         continue;
 751                 v4l2_device_unregister_subdev(&dev->subdev);
 752                 dev->ve.pipe = NULL;
 753                 fmd->fimc_lite[i] = NULL;
 754         }
 755         for (i = 0; i < CSIS_MAX_ENTITIES; i++) {
 756                 if (fmd->csis[i].sd == NULL)
 757                         continue;
 758                 v4l2_device_unregister_subdev(fmd->csis[i].sd);
 759                 fmd->csis[i].sd = NULL;
 760         }
 761
 762         if (fmd->fimc_is)
 763                 v4l2_device_unregister_subdev(&fmd->fimc_is->isp.subdev);
 764
 765         v4l2_info(&fmd->v4l2_dev, "Unregistered all entities\n");
 766 }
 767
 768 /**
 769  * __fimc_md_create_fimc_links - create links to all FIMC entities
 770  * @fmd: fimc media device
 771  * @source: the source entity to create links to all fimc entities from
 772  * @sensor: sensor subdev linked to FIMC[fimc_id] entity, may be null
 773  * @pad: the source entity pad index
 774  * @link_mask: bitmask of the fimc devices for which link should be enabled
 775  */
 776 static int __fimc_md_create_fimc_sink_links(struct fimc_md *fmd,
 777                                             struct media_entity *source,
 778                                             struct v4l2_subdev *sensor,
 779                                             int pad, int link_mask)
 780 {
 781         struct fimc_source_info *si = NULL;
 782         struct media_entity *sink;
 783         unsigned int flags = 0;
 784         int i, ret = 0;
 785
 786         if (sensor) {
 787                 si = v4l2_get_subdev_hostdata(sensor);
 788                 /* Skip direct FIMC links in the logical FIMC-IS sensor path */
 789                 if (si && si->fimc_bus_type == FIMC_BUS_TYPE_ISP_WRITEBACK)
 790                         ret = 1;
 791         }
 792
 793         for (i = 0; !ret && i < FIMC_MAX_DEVS; i++) {
 794                 if (!fmd->fimc[i])
 795                         continue;
 796                 /*
 797                  * Some FIMC variants are not fitted with camera capture
 798                  * interface. Skip creating a link from sensor for those.
 799                  */
 800                 if (!fmd->fimc[i]->variant->has_cam_if)
 801                         continue;
 802
 803                 flags = ((1 << i) & link_mask) ? MEDIA_LNK_FL_ENABLED : 0;
 804
 805                 sink = &fmd->fimc[i]->vid_cap.subdev.entity;
 806                 ret = media_create_pad_link(source, pad, sink,
 807                                               FIMC_SD_PAD_SINK_CAM, flags);
 808                 if (ret)
 809                         return ret;
 810
 811                 /* Notify FIMC capture subdev entity */
 812                 ret = media_entity_call(sink, link_setup, &sink->pads[0],
 813                                         &source->pads[pad], flags);
 814                 if (ret)
 815                         break;
 816
 817                 v4l2_info(&fmd->v4l2_dev, "created link [%s] %c> [%s]\n",
 818                           source->name, flags ? '=' : '-', sink->name);
 819         }
 820
 821         for (i = 0; i < FIMC_LITE_MAX_DEVS; i++) {
 822                 if (!fmd->fimc_lite[i])
 823                         continue;
 824
 825                 sink = &fmd->fimc_lite[i]->subdev.entity;
 826                 ret = media_create_pad_link(source, pad, sink,
 827                                                FLITE_SD_PAD_SINK, 0);
 828                 if (ret)
 829                         return ret;
 830
 831                 /* Notify FIMC-LITE subdev entity */
 832                 ret = media_entity_call(sink, link_setup, &sink->pads[0],
 833                                         &source->pads[pad], 0);
 834                 if (ret)
 835                         break;
 836
 837                 v4l2_info(&fmd->v4l2_dev, "created link [%s] -> [%s]\n",
 838                           source->name, sink->name);
 839         }
 840         return 0;
 841 }
 842
 843 /* Create links from FIMC-LITE source pads to other entities */
 844 static int __fimc_md_create_flite_source_links(struct fimc_md *fmd)
 845 {
 846         struct media_entity *source, *sink;
 847         int i, ret = 0;
 848
 849         for (i = 0; i < FIMC_LITE_MAX_DEVS; i++) {
 850                 struct fimc_lite *fimc = fmd->fimc_lite[i];
 851
 852                 if (fimc == NULL)
 853                         continue;
 854
 855                 source = &fimc->subdev.entity;
 856                 sink = &fimc->ve.vdev.entity;
 857                 /* FIMC-LITE's subdev and video node */
 858                 ret = media_create_pad_link(source, FLITE_SD_PAD_SOURCE_DMA,
 859                                                sink, 0, 0);
 860                 if (ret)
 861                         break;
 862                 /* Link from FIMC-LITE to IS-ISP subdev */
 863                 sink = &fmd->fimc_is->isp.subdev.entity;
 864                 ret = media_create_pad_link(source, FLITE_SD_PAD_SOURCE_ISP,
 865                                                sink, 0, 0);
 866                 if (ret)
 867                         break;
 868         }
 869
 870         return ret;
 871 }
 872
 873 /* Create FIMC-IS links */
 874 static int __fimc_md_create_fimc_is_links(struct fimc_md *fmd)
 875 {
 876         struct fimc_isp *isp = &fmd->fimc_is->isp;
 877         struct media_entity *source, *sink;
 878         int i, ret;
 879
 880         source = &isp->subdev.entity;
 881
 882         for (i = 0; i < FIMC_MAX_DEVS; i++) {
 883                 if (fmd->fimc[i] == NULL)
 884                         continue;
 885
 886                 /* Link from FIMC-IS-ISP subdev to FIMC */
 887                 sink = &fmd->fimc[i]->vid_cap.subdev.entity;
 888                 ret = media_create_pad_link(source, FIMC_ISP_SD_PAD_SRC_FIFO,
 889                                                sink, FIMC_SD_PAD_SINK_FIFO, 0);
 890                 if (ret)
 891                         return ret;
 892         }
 893
 894         /* Link from FIMC-IS-ISP subdev to fimc-is-isp.capture video node */
 895         sink = &isp->video_capture.ve.vdev.entity;
 896
 897         /* Skip this link if the fimc-is-isp video node driver isn't built-in */
 898         if (sink->num_pads == 0)
 899                 return 0;
 900
 901         return media_create_pad_link(source, FIMC_ISP_SD_PAD_SRC_DMA,
 902                                         sink, 0, 0);
 903 }
 904
 905 /**
 906  * fimc_md_create_links - create default links between registered entities
 907  * @fmd: fimc media device
 908  *
 909  * Parallel interface sensor entities are connected directly to FIMC capture
 910  * entities. The sensors using MIPI CSIS bus are connected through immutable
 911  * link with CSI receiver entity specified by mux_id. Any registered CSIS
 912  * entity has a link to each registered FIMC capture entity. Enabled links
 913  * are created by default between each subsequent registered sensor and
 914  * subsequent FIMC capture entity. The number of default active links is
 915  * determined by the number of available sensors or FIMC entities,
 916  * whichever is less.
 917  */
 918 static int fimc_md_create_links(struct fimc_md *fmd)
 919 {
 920         struct v4l2_subdev *csi_sensors[CSIS_MAX_ENTITIES] = { NULL };
 921         struct v4l2_subdev *sensor, *csis;
 922         struct fimc_source_info *pdata;
 923         struct media_entity *source, *sink;
 924         int i, pad, fimc_id = 0, ret = 0;
 925         u32 flags, link_mask = 0;
 926
 927         for (i = 0; i < fmd->num_sensors; i++) {
 928                 if (fmd->sensor[i].subdev == NULL)
 929                         continue;
 930
 931                 sensor = fmd->sensor[i].subdev;
 932                 pdata = v4l2_get_subdev_hostdata(sensor);
 933                 if (!pdata)
 934                         continue;
 935
 936                 source = NULL;
 937
 938                 switch (pdata->sensor_bus_type) {
 939                 case FIMC_BUS_TYPE_MIPI_CSI2:
 940                         if (WARN(pdata->mux_id >= CSIS_MAX_ENTITIES,
 941                                 "Wrong CSI channel id: %d\n", pdata->mux_id))
 942                                 return -EINVAL;
 943
 944                         csis = fmd->csis[pdata->mux_id].sd;
 945                         if (WARN(csis == NULL,
 946                                  "MIPI-CSI interface specified but s5p-csis module is not loaded!\n"))
 947                                 return -EINVAL;
 948
 949                         pad = sensor->entity.num_pads - 1;
 950                         ret = media_create_pad_link(&sensor->entity, pad,
 951                                               &csis->entity, CSIS_PAD_SINK,
 952                                               MEDIA_LNK_FL_IMMUTABLE |
 953                                               MEDIA_LNK_FL_ENABLED);
 954                         if (ret)
 955                                 return ret;
 956
 957                         v4l2_info(&fmd->v4l2_dev, "created link [%s] => [%s]\n",
 958                                   sensor->entity.name, csis->entity.name);
 959
 960                         source = NULL;
 961                         csi_sensors[pdata->mux_id] = sensor;
 962                         break;
 963
 964                 case FIMC_BUS_TYPE_ITU_601...FIMC_BUS_TYPE_ITU_656:
 965                         source = &sensor->entity;
 966                         pad = 0;
 967                         break;
 968
 969                 default:
 970                         v4l2_err(&fmd->v4l2_dev, "Wrong bus_type: %x\n",
 971                                  pdata->sensor_bus_type);
 972                         return -EINVAL;
 973                 }
 974                 if (source == NULL)
 975                         continue;
 976
 977                 link_mask = 1 << fimc_id++;
 978                 ret = __fimc_md_create_fimc_sink_links(fmd, source, sensor,
 979                                                        pad, link_mask);
 980         }
 981
 982         for (i = 0; i < CSIS_MAX_ENTITIES; i++) {
 983                 if (fmd->csis[i].sd == NULL)
 984                         continue;
 985
 986                 source = &fmd->csis[i].sd->entity;
 987                 pad = CSIS_PAD_SOURCE;
 988                 sensor = csi_sensors[i];
 989
 990                 link_mask = 1 << fimc_id++;
 991                 ret = __fimc_md_create_fimc_sink_links(fmd, source, sensor,
 992                                                        pad, link_mask);
 993         }
 994
 995         /* Create immutable links between each FIMC's subdev and video node */
 996         flags = MEDIA_LNK_FL_IMMUTABLE | MEDIA_LNK_FL_ENABLED;
 997         for (i = 0; i < FIMC_MAX_DEVS; i++) {
 998                 if (!fmd->fimc[i])
 999                         continue;
1000
1001                 source = &fmd->fimc[i]->vid_cap.subdev.entity;
1002                 sink = &fmd->fimc[i]->vid_cap.ve.vdev.entity;
1003
1004                 ret = media_create_pad_link(source, FIMC_SD_PAD_SOURCE,
1005                                               sink, 0, flags);
1006                 if (ret)
1007                         break;
1008         }
1009
1010         ret = __fimc_md_create_flite_source_links(fmd);
1011         if (ret < 0)
1012                 return ret;
1013
1014         if (fmd->use_isp)
1015                 ret = __fimc_md_create_fimc_is_links(fmd);
1016
1017         return ret;
1018 }
1019
1020 /*
1021  * The peripheral sensor and CAM_BLK (PIXELASYNCMx) clocks management.
1022  */
1023 static void fimc_md_put_clocks(struct fimc_md *fmd)
1024 {
1025         int i = FIMC_MAX_CAMCLKS;
1026
1027         while (--i >= 0) {
1028                 if (IS_ERR(fmd->camclk[i].clock))
1029                         continue;
1030                 clk_put(fmd->camclk[i].clock);
1031                 fmd->camclk[i].clock = ERR_PTR(-EINVAL);
1032         }
1033
1034         /* Writeback (PIXELASYNCMx) clocks */
1035         for (i = 0; i < FIMC_MAX_WBCLKS; i++) {
1036                 if (IS_ERR(fmd->wbclk[i]))
1037                         continue;
1038                 clk_put(fmd->wbclk[i]);
1039                 fmd->wbclk[i] = ERR_PTR(-EINVAL);
1040         }
1041 }
1042
1043 static int fimc_md_get_clocks(struct fimc_md *fmd)
1044 {
1045         struct device *dev = &fmd->pdev->dev;
1046         char clk_name[32];
1047         struct clk *clock;
1048         int i, ret = 0;
1049
1050         for (i = 0; i < FIMC_MAX_CAMCLKS; i++)
1051                 fmd->camclk[i].clock = ERR_PTR(-EINVAL);
1052
1053         for (i = 0; i < FIMC_MAX_CAMCLKS; i++) {
1054                 snprintf(clk_name, sizeof(clk_name), "sclk_cam%u", i);
1055                 clock = clk_get(dev, clk_name);
1056
1057                 if (IS_ERR(clock)) {
1058                         dev_err(dev, "Failed to get clock: %s\n", clk_name);
1059                         ret = PTR_ERR(clock);
1060                         break;
1061                 }
1062                 fmd->camclk[i].clock = clock;
1063         }
1064         if (ret)
1065                 fimc_md_put_clocks(fmd);
1066
1067         if (!fmd->use_isp)
1068                 return 0;
1069         /*
1070          * For now get only PIXELASYNCM1 clock (Writeback B/ISP),
1071          * leave PIXELASYNCM0 out for the LCD Writeback driver.
1072          */
1073         fmd->wbclk[CLK_IDX_WB_A] = ERR_PTR(-EINVAL);
1074
1075         for (i = CLK_IDX_WB_B; i < FIMC_MAX_WBCLKS; i++) {
1076                 snprintf(clk_name, sizeof(clk_name), "pxl_async%u", i);
1077                 clock = clk_get(dev, clk_name);
1078                 if (IS_ERR(clock)) {
1079                         v4l2_err(&fmd->v4l2_dev, "Failed to get clock: %s\n",
1080                                   clk_name);
1081                         ret = PTR_ERR(clock);
1082                         break;
1083                 }
1084                 fmd->wbclk[i] = clock;
1085         }
1086         if (ret)
1087                 fimc_md_put_clocks(fmd);
1088
1089         return ret;
1090 }
1091
1092 static int __fimc_md_modify_pipeline(struct media_entity *entity, bool enable)
1093 {
1094         struct exynos_video_entity *ve;
1095         struct fimc_pipeline *p;
1096         struct video_device *vdev;
1097         int ret;
1098
1099         vdev = media_entity_to_video_device(entity);
1100         if (vdev->entity.use_count == 0)
1101                 return 0;
1102
1103         ve = vdev_to_exynos_video_entity(vdev);
1104         p = to_fimc_pipeline(ve->pipe);
1105         /*
1106          * Nothing to do if we are disabling the pipeline, some link
1107          * has been disconnected and p->subdevs array is cleared now.
1108          */
1109         if (!enable && p->subdevs[IDX_SENSOR] == NULL)
1110                 return 0;
1111
1112         if (enable)
1113                 ret = __fimc_pipeline_open(ve->pipe, entity, true);
1114         else
1115                 ret = __fimc_pipeline_close(ve->pipe);
1116
1117         if (ret == 0 && !enable)
1118                 memset(p->subdevs, 0, sizeof(p->subdevs));
1119
1120         return ret;
1121 }
1122
1123 /* Locking: called with entity->graph_obj.mdev->graph_mutex mutex held. */
1124 static int __fimc_md_modify_pipelines(struct media_entity *entity, bool enable,
1125                                       struct media_graph *graph)
1126 {
1127         struct media_entity *entity_err = entity;
1128         int ret;
1129
1130         /*
1131          * Walk current graph and call the pipeline open/close routine for each
1132          * opened video node that belongs to the graph of entities connected
1133          * through active links. This is needed as we cannot power on/off the
1134          * subdevs in random order.
1135          */
1136         media_graph_walk_start(graph, entity);
1137
1138         while ((entity = media_graph_walk_next(graph))) {
1139                 if (!is_media_entity_v4l2_video_device(entity))
1140                         continue;
1141
1142                 ret  = __fimc_md_modify_pipeline(entity, enable);
1143
1144                 if (ret < 0)
1145                         goto err;
1146         }
1147
1148         return 0;
1149
1150 err:
1151         media_graph_walk_start(graph, entity_err);
1152
1153         while ((entity_err = media_graph_walk_next(graph))) {
1154                 if (!is_media_entity_v4l2_video_device(entity_err))
1155                         continue;
1156
1157                 __fimc_md_modify_pipeline(entity_err, !enable);
1158
1159                 if (entity_err == entity)
1160                         break;
1161         }
1162
1163         return ret;
1164 }
1165
1166 static int fimc_md_link_notify(struct media_link *link, unsigned int flags,
1167                                 unsigned int notification)
1168 {
1169         struct media_graph *graph =
1170                 &container_of(link->graph_obj.mdev, struct fimc_md,
1171                               media_dev)->link_setup_graph;
1172         struct media_entity *sink = link->sink->entity;
1173         int ret = 0;
1174
1175         /* Before link disconnection */
1176         if (notification == MEDIA_DEV_NOTIFY_PRE_LINK_CH) {
1177                 ret = media_graph_walk_init(graph,
1178                                                    link->graph_obj.mdev);
1179                 if (ret)
1180                         return ret;
1181                 if (!(flags & MEDIA_LNK_FL_ENABLED))
1182                         ret = __fimc_md_modify_pipelines(sink, false, graph);
1183 #if 0
1184                 else
1185                         /* TODO: Link state change validation */
1186 #endif
1187         /* After link activation */
1188         } else if (notification == MEDIA_DEV_NOTIFY_POST_LINK_CH) {
1189                 if (link->flags & MEDIA_LNK_FL_ENABLED)
1190                         ret = __fimc_md_modify_pipelines(sink, true, graph);
1191                 media_graph_walk_cleanup(graph);
1192         }
1193
1194         return ret ? -EPIPE : 0;
1195 }
1196
1197 static const struct media_device_ops fimc_md_ops = {
1198         .link_notify = fimc_md_link_notify,
1199 };
1200
1201 static ssize_t fimc_md_sysfs_show(struct device *dev,
1202                                   struct device_attribute *attr, char *buf)
1203 {
1204         struct platform_device *pdev = to_platform_device(dev);
1205         struct fimc_md *fmd = platform_get_drvdata(pdev);
1206
1207         if (fmd->user_subdev_api)
1208                 return strlcpy(buf, "Sub-device API (sub-dev)\n", PAGE_SIZE);
1209
1210         return strlcpy(buf, "V4L2 video node only API (vid-dev)\n", PAGE_SIZE);
1211 }
1212
1213 static ssize_t fimc_md_sysfs_store(struct device *dev,
1214                                    struct device_attribute *attr,
1215                                    const char *buf, size_t count)
1216 {
1217         struct platform_device *pdev = to_platform_device(dev);
1218         struct fimc_md *fmd = platform_get_drvdata(pdev);
1219         bool subdev_api;
1220         int i;
1221
1222         if (!strcmp(buf, "vid-dev\n"))
1223                 subdev_api = false;
1224         else if (!strcmp(buf, "sub-dev\n"))
1225                 subdev_api = true;
1226         else
1227                 return count;
1228
1229         fmd->user_subdev_api = subdev_api;
1230         for (i = 0; i < FIMC_MAX_DEVS; i++)
1231                 if (fmd->fimc[i])
1232                         fmd->fimc[i]->vid_cap.user_subdev_api = subdev_api;
1233         return count;
1234 }
1235 /*
1236  * This device attribute is to select video pipeline configuration method.
1237  * There are following valid values:
1238  *  vid-dev - for V4L2 video node API only, subdevice will be configured
1239  *  by the host driver.
1240  *  sub-dev - for media controller API, subdevs must be configured in user
1241  *  space before starting streaming.
1242  */
1243 static DEVICE_ATTR(subdev_conf_mode, S_IWUSR | S_IRUGO,
1244                    fimc_md_sysfs_show, fimc_md_sysfs_store);
1245
1246 static int fimc_md_get_pinctrl(struct fimc_md *fmd)
1247 {
1248         struct device *dev = &fmd->pdev->dev;
1249         struct fimc_pinctrl *pctl = &fmd->pinctl;
1250
1251         pctl->pinctrl = devm_pinctrl_get(dev);
1252         if (IS_ERR(pctl->pinctrl))
1253                 return PTR_ERR(pctl->pinctrl);
1254
1255         pctl->state_default = pinctrl_lookup_state(pctl->pinctrl,
1256                                         PINCTRL_STATE_DEFAULT);
1257         if (IS_ERR(pctl->state_default))
1258                 return PTR_ERR(pctl->state_default);
1259
1260         pctl->state_idle = pinctrl_lookup_state(pctl->pinctrl,
1261                                         PINCTRL_STATE_IDLE);
1262         return 0;
1263 }
1264
1265 static int cam_clk_prepare(struct clk_hw *hw)
1266 {
1267         struct cam_clk *camclk = to_cam_clk(hw);
1268         int ret;
1269
1270         if (camclk->fmd->pmf == NULL)
1271                 return -ENODEV;
1272
1273         ret = pm_runtime_get_sync(camclk->fmd->pmf);
1274         return ret < 0 ? ret : 0;
1275 }
1276
1277 static void cam_clk_unprepare(struct clk_hw *hw)
1278 {
1279         struct cam_clk *camclk = to_cam_clk(hw);
1280
1281         if (camclk->fmd->pmf == NULL)
1282                 return;
1283
1284         pm_runtime_put_sync(camclk->fmd->pmf);
1285 }
1286
1287 static const struct clk_ops cam_clk_ops = {
1288         .prepare = cam_clk_prepare,
1289         .unprepare = cam_clk_unprepare,
1290 };
1291
1292 static void fimc_md_unregister_clk_provider(struct fimc_md *fmd)
1293 {
1294         struct cam_clk_provider *cp = &fmd->clk_provider;
1295         unsigned int i;
1296
1297         if (cp->of_node)
1298                 of_clk_del_provider(cp->of_node);
1299
1300         for (i = 0; i < cp->num_clocks; i++)
1301                 clk_unregister(cp->clks[i]);
1302 }
1303
1304 static int fimc_md_register_clk_provider(struct fimc_md *fmd)
1305 {
1306         struct cam_clk_provider *cp = &fmd->clk_provider;
1307         struct device *dev = &fmd->pdev->dev;
1308         int i, ret;
1309
1310         for (i = 0; i < FIMC_MAX_CAMCLKS; i++) {
1311                 struct cam_clk *camclk = &cp->camclk[i];
1312                 struct clk_init_data init;
1313                 const char *p_name;
1314
1315                 ret = of_property_read_string_index(dev->of_node,
1316                                         "clock-output-names", i, &init.name);
1317                 if (ret < 0)
1318                         break;
1319
1320                 p_name = __clk_get_name(fmd->camclk[i].clock);
1321
1322                 /* It's safe since clk_register() will duplicate the string. */
1323                 init.parent_names = &p_name;
1324                 init.num_parents = 1;
1325                 init.ops = &cam_clk_ops;
1326                 init.flags = CLK_SET_RATE_PARENT;
1327                 camclk->hw.init = &init;
1328                 camclk->fmd = fmd;
1329
1330                 cp->clks[i] = clk_register(NULL, &camclk->hw);
1331                 if (IS_ERR(cp->clks[i])) {
1332                         dev_err(dev, "failed to register clock: %s (%ld)\n",
1333                                         init.name, PTR_ERR(cp->clks[i]));
1334                         ret = PTR_ERR(cp->clks[i]);
1335                         goto err;
1336                 }
1337                 cp->num_clocks++;
1338         }
1339
1340         if (cp->num_clocks == 0) {
1341                 dev_warn(dev, "clk provider not registered\n");
1342                 return 0;
1343         }
1344
1345         cp->clk_data.clks = cp->clks;
1346         cp->clk_data.clk_num = cp->num_clocks;
1347         cp->of_node = dev->of_node;
1348         ret = of_clk_add_provider(dev->of_node, of_clk_src_onecell_get,
1349                                   &cp->clk_data);
1350         if (ret == 0)
1351                 return 0;
1352 err:
1353         fimc_md_unregister_clk_provider(fmd);
1354         return ret;
1355 }
1356
1357 static int subdev_notifier_bound(struct v4l2_async_notifier *notifier,
1358                                  struct v4l2_subdev *subdev,
1359                                  struct v4l2_async_subdev *asd)
1360 {
1361         struct fimc_md *fmd = notifier_to_fimc_md(notifier);
1362         struct fimc_sensor_info *si = NULL;
1363         int i;
1364
1365         /* Find platform data for this sensor subdev */
1366         for (i = 0; i < ARRAY_SIZE(fmd->sensor); i++)
1367                 if (fmd->sensor[i].asd.match.fwnode ==
1368                     of_fwnode_handle(subdev->dev->of_node))
1369                         si = &fmd->sensor[i];
1370
1371         if (si == NULL)
1372                 return -EINVAL;
1373
1374         v4l2_set_subdev_hostdata(subdev, &si->pdata);
1375
1376         if (si->pdata.fimc_bus_type == FIMC_BUS_TYPE_ISP_WRITEBACK)
1377                 subdev->grp_id = GRP_ID_FIMC_IS_SENSOR;
1378         else
1379                 subdev->grp_id = GRP_ID_SENSOR;
1380
1381         si->subdev = subdev;
1382
1383         v4l2_info(&fmd->v4l2_dev, "Registered sensor subdevice: %s (%d)\n",
1384                   subdev->name, fmd->num_sensors);
1385
1386         fmd->num_sensors++;
1387
1388         return 0;
1389 }
1390
1391 static int subdev_notifier_complete(struct v4l2_async_notifier *notifier)
1392 {
1393         struct fimc_md *fmd = notifier_to_fimc_md(notifier);
1394         int ret;
1395
1396         mutex_lock(&fmd->media_dev.graph_mutex);
1397
1398         ret = fimc_md_create_links(fmd);
1399         if (ret < 0)
1400                 goto unlock;
1401
1402         ret = v4l2_device_register_subdev_nodes(&fmd->v4l2_dev);
1403 unlock:
1404         mutex_unlock(&fmd->media_dev.graph_mutex);
1405         if (ret < 0)
1406                 return ret;
1407
1408         return media_device_register(&fmd->media_dev);
1409 }
1410
1411 static const struct v4l2_async_notifier_operations subdev_notifier_ops = {
1412         .bound = subdev_notifier_bound,
1413         .complete = subdev_notifier_complete,
1414 };
1415
1416 static int fimc_md_probe(struct platform_device *pdev)
1417 {
1418         struct device *dev = &pdev->dev;
1419         struct v4l2_device *v4l2_dev;
1420         struct fimc_md *fmd;
1421         int ret;
1422
1423         fmd = devm_kzalloc(dev, sizeof(*fmd), GFP_KERNEL);
1424         if (!fmd)
1425                 return -ENOMEM;
1426
1427         spin_lock_init(&fmd->slock);
1428         INIT_LIST_HEAD(&fmd->pipelines);
1429         fmd->pdev = pdev;
1430
1431         strlcpy(fmd->media_dev.model, "SAMSUNG S5P FIMC",
1432                 sizeof(fmd->media_dev.model));
1433         fmd->media_dev.ops = &fimc_md_ops;
1434         fmd->media_dev.dev = dev;
1435
1436         v4l2_dev = &fmd->v4l2_dev;
1437         v4l2_dev->mdev = &fmd->media_dev;
1438         v4l2_dev->notify = fimc_sensor_notify;
1439         strlcpy(v4l2_dev->name, "s5p-fimc-md", sizeof(v4l2_dev->name));
1440
1441         fmd->use_isp = fimc_md_is_isp_available(dev->of_node);
1442         fmd->user_subdev_api = true;
1443
1444         media_device_init(&fmd->media_dev);
1445
1446         ret = v4l2_device_register(dev, &fmd->v4l2_dev);
1447         if (ret < 0) {
1448                 v4l2_err(v4l2_dev, "Failed to register v4l2_device: %d\n", ret);
1449                 return ret;
1450         }
1451
1452         ret = fimc_md_get_clocks(fmd);
1453         if (ret)
1454                 goto err_md;
1455
1456         ret = fimc_md_get_pinctrl(fmd);
1457         if (ret < 0) {
1458                 if (ret != EPROBE_DEFER)
1459                         dev_err(dev, "Failed to get pinctrl: %d\n", ret);
1460                 goto err_clk;
1461         }
1462
1463         platform_set_drvdata(pdev, fmd);
1464
1465         ret = fimc_md_register_platform_entities(fmd, dev->of_node);
1466         if (ret)
1467                 goto err_clk;
1468
1469         ret = fimc_md_register_sensor_entities(fmd);
1470         if (ret)
1471                 goto err_m_ent;
1472
1473         ret = device_create_file(&pdev->dev, &dev_attr_subdev_conf_mode);
1474         if (ret)
1475                 goto err_m_ent;
1476         /*
1477          * FIMC platform devices need to be registered before the sclk_cam
1478          * clocks provider, as one of these devices needs to be activated
1479          * to enable the clock.
1480          */
1481         ret = fimc_md_register_clk_provider(fmd);
1482         if (ret < 0) {
1483                 v4l2_err(v4l2_dev, "clock provider registration failed\n");
1484                 goto err_attr;
1485         }
1486
1487         if (fmd->num_sensors > 0) {
1488                 fmd->subdev_notifier.subdevs = fmd->async_subdevs;
1489                 fmd->subdev_notifier.num_subdevs = fmd->num_sensors;
1490                 fmd->subdev_notifier.ops = &subdev_notifier_ops;
1491                 fmd->num_sensors = 0;
1492
1493                 ret = v4l2_async_notifier_register(&fmd->v4l2_dev,
1494                                                 &fmd->subdev_notifier);
1495                 if (ret)
1496                         goto err_clk_p;
1497         }
1498
1499         return 0;
1500
1501 err_clk_p:
1502         fimc_md_unregister_clk_provider(fmd);
1503 err_attr:
1504         device_remove_file(&pdev->dev, &dev_attr_subdev_conf_mode);
1505 err_clk:
1506         fimc_md_put_clocks(fmd);
1507 err_m_ent:
1508         fimc_md_unregister_entities(fmd);
1509 err_md:
1510         media_device_cleanup(&fmd->media_dev);
1511         v4l2_device_unregister(&fmd->v4l2_dev);
1512         return ret;
1513 }
1514
1515 static int fimc_md_remove(struct platform_device *pdev)
1516 {
1517         struct fimc_md *fmd = platform_get_drvdata(pdev);
1518
1519         if (!fmd)
1520                 return 0;
1521
1522         fimc_md_unregister_clk_provider(fmd);
1523         v4l2_async_notifier_unregister(&fmd->subdev_notifier);
1524
1525         v4l2_device_unregister(&fmd->v4l2_dev);
1526         device_remove_file(&pdev->dev, &dev_attr_subdev_conf_mode);
1527         fimc_md_unregister_entities(fmd);
1528         fimc_md_pipelines_free(fmd);
1529         media_device_unregister(&fmd->media_dev);
1530         media_device_cleanup(&fmd->media_dev);
1531         fimc_md_put_clocks(fmd);
1532
1533         return 0;
1534 }
1535
1536 static const struct platform_device_id fimc_driver_ids[] __always_unused = {
1537         { .name = "s5p-fimc-md" },
1538         { },
1539 };
1540 MODULE_DEVICE_TABLE(platform, fimc_driver_ids);
1541
1542 static const struct of_device_id fimc_md_of_match[] = {
1543         { .compatible = "samsung,fimc" },
1544         { },
1545 };
1546 MODULE_DEVICE_TABLE(of, fimc_md_of_match);
1547
1548 static struct platform_driver fimc_md_driver = {
1549         .probe          = fimc_md_probe,
1550         .remove         = fimc_md_remove,
1551         .driver = {
1552                 .of_match_table = of_match_ptr(fimc_md_of_match),
1553                 .name           = "s5p-fimc-md",
1554         }
1555 };
1556
1557 static int __init fimc_md_init(void)
1558 {
1559         int ret;
1560
1561         request_module("s5p-csis");
1562         ret = fimc_register_driver();
1563         if (ret)
1564                 return ret;
1565
1566         return platform_driver_register(&fimc_md_driver);
1567 }
1568
1569 static void __exit fimc_md_exit(void)
1570 {
1571         platform_driver_unregister(&fimc_md_driver);
1572         fimc_unregister_driver();
1573 }
1574
1575 module_init(fimc_md_init);
1576 module_exit(fimc_md_exit);
1577
1578 MODULE_AUTHOR("Sylwester Nawrocki <s.nawrocki@samsung.com>");
1579 MODULE_DESCRIPTION("S5P FIMC camera host interface/video postprocessor driver");
1580 MODULE_LICENSE("GPL");
1581 MODULE_VERSION("2.0.1");