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