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                 pm_runtime_put(fmd->pmf);
 486                 return ret;
 487         }
 488
 489         fmd->num_sensors = 0;
 490
 491         /* Attach sensors linked to MIPI CSI-2 receivers */
 492         for_each_available_child_of_node(parent, node) {
 493                 struct device_node *port;
 494
 495                 if (of_node_cmp(node->name, "csis"))
 496                         continue;
 497                 /* The csis node can have only port subnode. */
 498                 port = of_get_next_child(node, NULL);
 499                 if (!port)
 500                         continue;
 501
 502                 ret = fimc_md_parse_port_node(fmd, port, index);
 503                 of_node_put(port);
 504                 if (ret < 0) {
 505                         of_node_put(node);
 506                         goto rpm_put;
 507                 }
 508                 index++;
 509         }
 510
 511         /* Attach sensors listed in the parallel-ports node */
 512         ports = of_get_child_by_name(parent, "parallel-ports");
 513         if (!ports)
 514                 goto rpm_put;
 515
 516         for_each_child_of_node(ports, node) {
 517                 ret = fimc_md_parse_port_node(fmd, node, index);
 518                 if (ret < 0) {
 519                         of_node_put(node);
 520                         break;
 521                 }
 522                 index++;
 523         }
 524 rpm_put:
 525         pm_runtime_put(fmd->pmf);
 526         return ret;
 527 }
 528
 529 static int __of_get_csis_id(struct device_node *np)
 530 {
 531         u32 reg = 0;
 532
 533         np = of_get_child_by_name(np, "port");
 534         if (!np)
 535                 return -EINVAL;
 536         of_property_read_u32(np, "reg", &reg);
 537         of_node_put(np);
 538         return reg - FIMC_INPUT_MIPI_CSI2_0;
 539 }
 540
 541 /*
 542  * MIPI-CSIS, FIMC and FIMC-LITE platform devices registration.
 543  */
 544 static int register_fimc_lite_entity(struct fimc_md *fmd,
 545                                      struct fimc_lite *fimc_lite)
 546 {
 547         struct v4l2_subdev *sd;
 548         struct exynos_media_pipeline *ep;
 549         int ret;
 550
 551         if (WARN_ON(fimc_lite->index >= FIMC_LITE_MAX_DEVS ||
 552                     fmd->fimc_lite[fimc_lite->index]))
 553                 return -EBUSY;
 554
 555         sd = &fimc_lite->subdev;
 556         sd->grp_id = GRP_ID_FLITE;
 557
 558         ep = fimc_md_pipeline_create(fmd);
 559         if (!ep)
 560                 return -ENOMEM;
 561
 562         v4l2_set_subdev_hostdata(sd, ep);
 563
 564         ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd);
 565         if (!ret)
 566                 fmd->fimc_lite[fimc_lite->index] = fimc_lite;
 567         else
 568                 v4l2_err(&fmd->v4l2_dev, "Failed to register FIMC.LITE%d\n",
 569                          fimc_lite->index);
 570         return ret;
 571 }
 572
 573 static int register_fimc_entity(struct fimc_md *fmd, struct fimc_dev *fimc)
 574 {
 575         struct v4l2_subdev *sd;
 576         struct exynos_media_pipeline *ep;
 577         int ret;
 578
 579         if (WARN_ON(fimc->id >= FIMC_MAX_DEVS || fmd->fimc[fimc->id]))
 580                 return -EBUSY;
 581
 582         sd = &fimc->vid_cap.subdev;
 583         sd->grp_id = GRP_ID_FIMC;
 584
 585         ep = fimc_md_pipeline_create(fmd);
 586         if (!ep)
 587                 return -ENOMEM;
 588
 589         v4l2_set_subdev_hostdata(sd, ep);
 590
 591         ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd);
 592         if (!ret) {
 593                 if (!fmd->pmf && fimc->pdev)
 594                         fmd->pmf = &fimc->pdev->dev;
 595                 fmd->fimc[fimc->id] = fimc;
 596                 fimc->vid_cap.user_subdev_api = fmd->user_subdev_api;
 597         } else {
 598                 v4l2_err(&fmd->v4l2_dev, "Failed to register FIMC.%d (%d)\n",
 599                          fimc->id, ret);
 600         }
 601         return ret;
 602 }
 603
 604 static int register_csis_entity(struct fimc_md *fmd,
 605                                 struct platform_device *pdev,
 606                                 struct v4l2_subdev *sd)
 607 {
 608         struct device_node *node = pdev->dev.of_node;
 609         int id, ret;
 610
 611         id = node ? __of_get_csis_id(node) : max(0, pdev->id);
 612
 613         if (WARN_ON(id < 0 || id >= CSIS_MAX_ENTITIES))
 614                 return -ENOENT;
 615
 616         if (WARN_ON(fmd->csis[id].sd))
 617                 return -EBUSY;
 618
 619         sd->grp_id = GRP_ID_CSIS;
 620         ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd);
 621         if (!ret)
 622                 fmd->csis[id].sd = sd;
 623         else
 624                 v4l2_err(&fmd->v4l2_dev,
 625                          "Failed to register MIPI-CSIS.%d (%d)\n", id, ret);
 626         return ret;
 627 }
 628
 629 static int register_fimc_is_entity(struct fimc_md *fmd, struct fimc_is *is)
 630 {
 631         struct v4l2_subdev *sd = &is->isp.subdev;
 632         struct exynos_media_pipeline *ep;
 633         int ret;
 634
 635         /* Allocate pipeline object for the ISP capture video node. */
 636         ep = fimc_md_pipeline_create(fmd);
 637         if (!ep)
 638                 return -ENOMEM;
 639
 640         v4l2_set_subdev_hostdata(sd, ep);
 641
 642         ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd);
 643         if (ret) {
 644                 v4l2_err(&fmd->v4l2_dev,
 645                          "Failed to register FIMC-ISP (%d)\n", ret);
 646                 return ret;
 647         }
 648
 649         fmd->fimc_is = is;
 650         return 0;
 651 }
 652
 653 static int fimc_md_register_platform_entity(struct fimc_md *fmd,
 654                                             struct platform_device *pdev,
 655                                             int plat_entity)
 656 {
 657         struct device *dev = &pdev->dev;
 658         int ret = -EPROBE_DEFER;
 659         void *drvdata;
 660
 661         /* Lock to ensure dev->driver won't change. */
 662         device_lock(dev);
 663
 664         if (!dev->driver || !try_module_get(dev->driver->owner))
 665                 goto dev_unlock;
 666
 667         drvdata = dev_get_drvdata(dev);
 668         /* Some subdev didn't probe successfully id drvdata is NULL */
 669         if (drvdata) {
 670                 switch (plat_entity) {
 671                 case IDX_FIMC:
 672                         ret = register_fimc_entity(fmd, drvdata);
 673                         break;
 674                 case IDX_FLITE:
 675                         ret = register_fimc_lite_entity(fmd, drvdata);
 676                         break;
 677                 case IDX_CSIS:
 678                         ret = register_csis_entity(fmd, pdev, drvdata);
 679                         break;
 680                 case IDX_IS_ISP:
 681                         ret = register_fimc_is_entity(fmd, drvdata);
 682                         break;
 683                 default:
 684                         ret = -ENODEV;
 685                 }
 686         }
 687
 688         module_put(dev->driver->owner);
 689 dev_unlock:
 690         device_unlock(dev);
 691         if (ret == -EPROBE_DEFER)
 692                 dev_info(&fmd->pdev->dev, "deferring %s device registration\n",
 693                         dev_name(dev));
 694         else if (ret < 0)
 695                 dev_err(&fmd->pdev->dev, "%s device registration failed (%d)\n",
 696                         dev_name(dev), ret);
 697         return ret;
 698 }
 699
 700 /* Register FIMC, FIMC-LITE and CSIS media entities */
 701 static int fimc_md_register_platform_entities(struct fimc_md *fmd,
 702                                               struct device_node *parent)
 703 {
 704         struct device_node *node;
 705         int ret = 0;
 706
 707         for_each_available_child_of_node(parent, node) {
 708                 struct platform_device *pdev;
 709                 int plat_entity = -1;
 710
 711                 pdev = of_find_device_by_node(node);
 712                 if (!pdev)
 713                         continue;
 714
 715                 /* If driver of any entity isn't ready try all again later. */
 716                 if (!strcmp(node->name, CSIS_OF_NODE_NAME))
 717                         plat_entity = IDX_CSIS;
 718                 else if (!strcmp(node->name, FIMC_IS_OF_NODE_NAME))
 719                         plat_entity = IDX_IS_ISP;
 720                 else if (!strcmp(node->name, FIMC_LITE_OF_NODE_NAME))
 721                         plat_entity = IDX_FLITE;
 722                 else if (!strcmp(node->name, FIMC_OF_NODE_NAME) &&
 723                          !of_property_read_bool(node, "samsung,lcd-wb"))
 724                         plat_entity = IDX_FIMC;
 725
 726                 if (plat_entity >= 0)
 727                         ret = fimc_md_register_platform_entity(fmd, pdev,
 728                                                         plat_entity);
 729                 put_device(&pdev->dev);
 730                 if (ret < 0) {
 731                         of_node_put(node);
 732                         break;
 733                 }
 734         }
 735
 736         return ret;
 737 }
 738
 739 static void fimc_md_unregister_entities(struct fimc_md *fmd)
 740 {
 741         int i;
 742
 743         for (i = 0; i < FIMC_MAX_DEVS; i++) {
 744                 struct fimc_dev *dev = fmd->fimc[i];
 745                 if (dev == NULL)
 746                         continue;
 747                 v4l2_device_unregister_subdev(&dev->vid_cap.subdev);
 748                 dev->vid_cap.ve.pipe = NULL;
 749                 fmd->fimc[i] = NULL;
 750         }
 751         for (i = 0; i < FIMC_LITE_MAX_DEVS; i++) {
 752                 struct fimc_lite *dev = fmd->fimc_lite[i];
 753                 if (dev == NULL)
 754                         continue;
 755                 v4l2_device_unregister_subdev(&dev->subdev);
 756                 dev->ve.pipe = NULL;
 757                 fmd->fimc_lite[i] = NULL;
 758         }
 759         for (i = 0; i < CSIS_MAX_ENTITIES; i++) {
 760                 if (fmd->csis[i].sd == NULL)
 761                         continue;
 762                 v4l2_device_unregister_subdev(fmd->csis[i].sd);
 763                 fmd->csis[i].sd = NULL;
 764         }
 765
 766         if (fmd->fimc_is)
 767                 v4l2_device_unregister_subdev(&fmd->fimc_is->isp.subdev);
 768
 769         v4l2_info(&fmd->v4l2_dev, "Unregistered all entities\n");
 770 }
 771
 772 /**
 773  * __fimc_md_create_fimc_links - create links to all FIMC entities
 774  * @fmd: fimc media device
 775  * @source: the source entity to create links to all fimc entities from
 776  * @sensor: sensor subdev linked to FIMC[fimc_id] entity, may be null
 777  * @pad: the source entity pad index
 778  * @link_mask: bitmask of the fimc devices for which link should be enabled
 779  */
 780 static int __fimc_md_create_fimc_sink_links(struct fimc_md *fmd,
 781                                             struct media_entity *source,
 782                                             struct v4l2_subdev *sensor,
 783                                             int pad, int link_mask)
 784 {
 785         struct fimc_source_info *si = NULL;
 786         struct media_entity *sink;
 787         unsigned int flags = 0;
 788         int i, ret = 0;
 789
 790         if (sensor) {
 791                 si = v4l2_get_subdev_hostdata(sensor);
 792                 /* Skip direct FIMC links in the logical FIMC-IS sensor path */
 793                 if (si && si->fimc_bus_type == FIMC_BUS_TYPE_ISP_WRITEBACK)
 794                         ret = 1;
 795         }
 796
 797         for (i = 0; !ret && i < FIMC_MAX_DEVS; i++) {
 798                 if (!fmd->fimc[i])
 799                         continue;
 800                 /*
 801                  * Some FIMC variants are not fitted with camera capture
 802                  * interface. Skip creating a link from sensor for those.
 803                  */
 804                 if (!fmd->fimc[i]->variant->has_cam_if)
 805                         continue;
 806
 807                 flags = ((1 << i) & link_mask) ? MEDIA_LNK_FL_ENABLED : 0;
 808
 809                 sink = &fmd->fimc[i]->vid_cap.subdev.entity;
 810                 ret = media_create_pad_link(source, pad, sink,
 811                                               FIMC_SD_PAD_SINK_CAM, flags);
 812                 if (ret)
 813                         return ret;
 814
 815                 /* Notify FIMC capture subdev entity */
 816                 ret = media_entity_call(sink, link_setup, &sink->pads[0],
 817                                         &source->pads[pad], flags);
 818                 if (ret)
 819                         break;
 820
 821                 v4l2_info(&fmd->v4l2_dev, "created link [%s] %c> [%s]\n",
 822                           source->name, flags ? '=' : '-', sink->name);
 823         }
 824
 825         for (i = 0; i < FIMC_LITE_MAX_DEVS; i++) {
 826                 if (!fmd->fimc_lite[i])
 827                         continue;
 828
 829                 sink = &fmd->fimc_lite[i]->subdev.entity;
 830                 ret = media_create_pad_link(source, pad, sink,
 831                                                FLITE_SD_PAD_SINK, 0);
 832                 if (ret)
 833                         return ret;
 834
 835                 /* Notify FIMC-LITE subdev entity */
 836                 ret = media_entity_call(sink, link_setup, &sink->pads[0],
 837                                         &source->pads[pad], 0);
 838                 if (ret)
 839                         break;
 840
 841                 v4l2_info(&fmd->v4l2_dev, "created link [%s] -> [%s]\n",
 842                           source->name, sink->name);
 843         }
 844         return 0;
 845 }
 846
 847 /* Create links from FIMC-LITE source pads to other entities */
 848 static int __fimc_md_create_flite_source_links(struct fimc_md *fmd)
 849 {
 850         struct media_entity *source, *sink;
 851         int i, ret = 0;
 852
 853         for (i = 0; i < FIMC_LITE_MAX_DEVS; i++) {
 854                 struct fimc_lite *fimc = fmd->fimc_lite[i];
 855
 856                 if (fimc == NULL)
 857                         continue;
 858
 859                 source = &fimc->subdev.entity;
 860                 sink = &fimc->ve.vdev.entity;
 861                 /* FIMC-LITE's subdev and video node */
 862                 ret = media_create_pad_link(source, FLITE_SD_PAD_SOURCE_DMA,
 863                                                sink, 0, 0);
 864                 if (ret)
 865                         break;
 866                 /* Link from FIMC-LITE to IS-ISP subdev */
 867                 sink = &fmd->fimc_is->isp.subdev.entity;
 868                 ret = media_create_pad_link(source, FLITE_SD_PAD_SOURCE_ISP,
 869                                                sink, 0, 0);
 870                 if (ret)
 871                         break;
 872         }
 873
 874         return ret;
 875 }
 876
 877 /* Create FIMC-IS links */
 878 static int __fimc_md_create_fimc_is_links(struct fimc_md *fmd)
 879 {
 880         struct fimc_isp *isp = &fmd->fimc_is->isp;
 881         struct media_entity *source, *sink;
 882         int i, ret;
 883
 884         source = &isp->subdev.entity;
 885
 886         for (i = 0; i < FIMC_MAX_DEVS; i++) {
 887                 if (fmd->fimc[i] == NULL)
 888                         continue;
 889
 890                 /* Link from FIMC-IS-ISP subdev to FIMC */
 891                 sink = &fmd->fimc[i]->vid_cap.subdev.entity;
 892                 ret = media_create_pad_link(source, FIMC_ISP_SD_PAD_SRC_FIFO,
 893                                                sink, FIMC_SD_PAD_SINK_FIFO, 0);
 894                 if (ret)
 895                         return ret;
 896         }
 897
 898         /* Link from FIMC-IS-ISP subdev to fimc-is-isp.capture video node */
 899         sink = &isp->video_capture.ve.vdev.entity;
 900
 901         /* Skip this link if the fimc-is-isp video node driver isn't built-in */
 902         if (sink->num_pads == 0)
 903                 return 0;
 904
 905         return media_create_pad_link(source, FIMC_ISP_SD_PAD_SRC_DMA,
 906                                         sink, 0, 0);
 907 }
 908
 909 /**
 910  * fimc_md_create_links - create default links between registered entities
 911  * @fmd: fimc media device
 912  *
 913  * Parallel interface sensor entities are connected directly to FIMC capture
 914  * entities. The sensors using MIPI CSIS bus are connected through immutable
 915  * link with CSI receiver entity specified by mux_id. Any registered CSIS
 916  * entity has a link to each registered FIMC capture entity. Enabled links
 917  * are created by default between each subsequent registered sensor and
 918  * subsequent FIMC capture entity. The number of default active links is
 919  * determined by the number of available sensors or FIMC entities,
 920  * whichever is less.
 921  */
 922 static int fimc_md_create_links(struct fimc_md *fmd)
 923 {
 924         struct v4l2_subdev *csi_sensors[CSIS_MAX_ENTITIES] = { NULL };
 925         struct v4l2_subdev *sensor, *csis;
 926         struct fimc_source_info *pdata;
 927         struct media_entity *source, *sink;
 928         int i, pad, fimc_id = 0, ret = 0;
 929         u32 flags, link_mask = 0;
 930
 931         for (i = 0; i < fmd->num_sensors; i++) {
 932                 if (fmd->sensor[i].subdev == NULL)
 933                         continue;
 934
 935                 sensor = fmd->sensor[i].subdev;
 936                 pdata = v4l2_get_subdev_hostdata(sensor);
 937                 if (!pdata)
 938                         continue;
 939
 940                 source = NULL;
 941
 942                 switch (pdata->sensor_bus_type) {
 943                 case FIMC_BUS_TYPE_MIPI_CSI2:
 944                         if (WARN(pdata->mux_id >= CSIS_MAX_ENTITIES,
 945                                 "Wrong CSI channel id: %d\n", pdata->mux_id))
 946                                 return -EINVAL;
 947
 948                         csis = fmd->csis[pdata->mux_id].sd;
 949                         if (WARN(csis == NULL,
 950                                  "MIPI-CSI interface specified but s5p-csis module is not loaded!\n"))
 951                                 return -EINVAL;
 952
 953                         pad = sensor->entity.num_pads - 1;
 954                         ret = media_create_pad_link(&sensor->entity, pad,
 955                                               &csis->entity, CSIS_PAD_SINK,
 956                                               MEDIA_LNK_FL_IMMUTABLE |
 957                                               MEDIA_LNK_FL_ENABLED);
 958                         if (ret)
 959                                 return ret;
 960
 961                         v4l2_info(&fmd->v4l2_dev, "created link [%s] => [%s]\n",
 962                                   sensor->entity.name, csis->entity.name);
 963
 964                         source = NULL;
 965                         csi_sensors[pdata->mux_id] = sensor;
 966                         break;
 967
 968                 case FIMC_BUS_TYPE_ITU_601...FIMC_BUS_TYPE_ITU_656:
 969                         source = &sensor->entity;
 970                         pad = 0;
 971                         break;
 972
 973                 default:
 974                         v4l2_err(&fmd->v4l2_dev, "Wrong bus_type: %x\n",
 975                                  pdata->sensor_bus_type);
 976                         return -EINVAL;
 977                 }
 978                 if (source == NULL)
 979                         continue;
 980
 981                 link_mask = 1 << fimc_id++;
 982                 ret = __fimc_md_create_fimc_sink_links(fmd, source, sensor,
 983                                                        pad, link_mask);
 984         }
 985
 986         for (i = 0; i < CSIS_MAX_ENTITIES; i++) {
 987                 if (fmd->csis[i].sd == NULL)
 988                         continue;
 989
 990                 source = &fmd->csis[i].sd->entity;
 991                 pad = CSIS_PAD_SOURCE;
 992                 sensor = csi_sensors[i];
 993
 994                 link_mask = 1 << fimc_id++;
 995                 ret = __fimc_md_create_fimc_sink_links(fmd, source, sensor,
 996                                                        pad, link_mask);
 997         }
 998
 999         /* Create immutable links between each FIMC's subdev and video node */
1000         flags = MEDIA_LNK_FL_IMMUTABLE | MEDIA_LNK_FL_ENABLED;
1001         for (i = 0; i < FIMC_MAX_DEVS; i++) {
1002                 if (!fmd->fimc[i])
1003                         continue;
1004
1005                 source = &fmd->fimc[i]->vid_cap.subdev.entity;
1006                 sink = &fmd->fimc[i]->vid_cap.ve.vdev.entity;
1007
1008                 ret = media_create_pad_link(source, FIMC_SD_PAD_SOURCE,
1009                                               sink, 0, flags);
1010                 if (ret)
1011                         break;
1012         }
1013
1014         ret = __fimc_md_create_flite_source_links(fmd);
1015         if (ret < 0)
1016                 return ret;
1017
1018         if (fmd->use_isp)
1019                 ret = __fimc_md_create_fimc_is_links(fmd);
1020
1021         return ret;
1022 }
1023
1024 /*
1025  * The peripheral sensor and CAM_BLK (PIXELASYNCMx) clocks management.
1026  */
1027 static void fimc_md_put_clocks(struct fimc_md *fmd)
1028 {
1029         int i = FIMC_MAX_CAMCLKS;
1030
1031         while (--i >= 0) {
1032                 if (IS_ERR(fmd->camclk[i].clock))
1033                         continue;
1034                 clk_put(fmd->camclk[i].clock);
1035                 fmd->camclk[i].clock = ERR_PTR(-EINVAL);
1036         }
1037
1038         /* Writeback (PIXELASYNCMx) clocks */
1039         for (i = 0; i < FIMC_MAX_WBCLKS; i++) {
1040                 if (IS_ERR(fmd->wbclk[i]))
1041                         continue;
1042                 clk_put(fmd->wbclk[i]);
1043                 fmd->wbclk[i] = ERR_PTR(-EINVAL);
1044         }
1045 }
1046
1047 static int fimc_md_get_clocks(struct fimc_md *fmd)
1048 {
1049         struct device *dev = &fmd->pdev->dev;
1050         char clk_name[32];
1051         struct clk *clock;
1052         int i, ret = 0;
1053
1054         for (i = 0; i < FIMC_MAX_CAMCLKS; i++)
1055                 fmd->camclk[i].clock = ERR_PTR(-EINVAL);
1056
1057         for (i = 0; i < FIMC_MAX_CAMCLKS; i++) {
1058                 snprintf(clk_name, sizeof(clk_name), "sclk_cam%u", i);
1059                 clock = clk_get(dev, clk_name);
1060
1061                 if (IS_ERR(clock)) {
1062                         dev_err(dev, "Failed to get clock: %s\n", clk_name);
1063                         ret = PTR_ERR(clock);
1064                         break;
1065                 }
1066                 fmd->camclk[i].clock = clock;
1067         }
1068         if (ret)
1069                 fimc_md_put_clocks(fmd);
1070
1071         if (!fmd->use_isp)
1072                 return 0;
1073         /*
1074          * For now get only PIXELASYNCM1 clock (Writeback B/ISP),
1075          * leave PIXELASYNCM0 out for the LCD Writeback driver.
1076          */
1077         fmd->wbclk[CLK_IDX_WB_A] = ERR_PTR(-EINVAL);
1078
1079         for (i = CLK_IDX_WB_B; i < FIMC_MAX_WBCLKS; i++) {
1080                 snprintf(clk_name, sizeof(clk_name), "pxl_async%u", i);
1081                 clock = clk_get(dev, clk_name);
1082                 if (IS_ERR(clock)) {
1083                         v4l2_err(&fmd->v4l2_dev, "Failed to get clock: %s\n",
1084                                   clk_name);
1085                         ret = PTR_ERR(clock);
1086                         break;
1087                 }
1088                 fmd->wbclk[i] = clock;
1089         }
1090         if (ret)
1091                 fimc_md_put_clocks(fmd);
1092
1093         return ret;
1094 }
1095
1096 static int __fimc_md_modify_pipeline(struct media_entity *entity, bool enable)
1097 {
1098         struct exynos_video_entity *ve;
1099         struct fimc_pipeline *p;
1100         struct video_device *vdev;
1101         int ret;
1102
1103         vdev = media_entity_to_video_device(entity);
1104         if (vdev->entity.use_count == 0)
1105                 return 0;
1106
1107         ve = vdev_to_exynos_video_entity(vdev);
1108         p = to_fimc_pipeline(ve->pipe);
1109         /*
1110          * Nothing to do if we are disabling the pipeline, some link
1111          * has been disconnected and p->subdevs array is cleared now.
1112          */
1113         if (!enable && p->subdevs[IDX_SENSOR] == NULL)
1114                 return 0;
1115
1116         if (enable)
1117                 ret = __fimc_pipeline_open(ve->pipe, entity, true);
1118         else
1119                 ret = __fimc_pipeline_close(ve->pipe);
1120
1121         if (ret == 0 && !enable)
1122                 memset(p->subdevs, 0, sizeof(p->subdevs));
1123
1124         return ret;
1125 }
1126
1127 /* Locking: called with entity->graph_obj.mdev->graph_mutex mutex held. */
1128 static int __fimc_md_modify_pipelines(struct media_entity *entity, bool enable,
1129                                       struct media_graph *graph)
1130 {
1131         struct media_entity *entity_err = entity;
1132         int ret;
1133
1134         /*
1135          * Walk current graph and call the pipeline open/close routine for each
1136          * opened video node that belongs to the graph of entities connected
1137          * through active links. This is needed as we cannot power on/off the
1138          * subdevs in random order.
1139          */
1140         media_graph_walk_start(graph, entity);
1141
1142         while ((entity = media_graph_walk_next(graph))) {
1143                 if (!is_media_entity_v4l2_video_device(entity))
1144                         continue;
1145
1146                 ret  = __fimc_md_modify_pipeline(entity, enable);
1147
1148                 if (ret < 0)
1149                         goto err;
1150         }
1151
1152         return 0;
1153
1154 err:
1155         media_graph_walk_start(graph, entity_err);
1156
1157         while ((entity_err = media_graph_walk_next(graph))) {
1158                 if (!is_media_entity_v4l2_video_device(entity_err))
1159                         continue;
1160
1161                 __fimc_md_modify_pipeline(entity_err, !enable);
1162
1163                 if (entity_err == entity)
1164                         break;
1165         }
1166
1167         return ret;
1168 }
1169
1170 static int fimc_md_link_notify(struct media_link *link, unsigned int flags,
1171                                 unsigned int notification)
1172 {
1173         struct media_graph *graph =
1174                 &container_of(link->graph_obj.mdev, struct fimc_md,
1175                               media_dev)->link_setup_graph;
1176         struct media_entity *sink = link->sink->entity;
1177         int ret = 0;
1178
1179         /* Before link disconnection */
1180         if (notification == MEDIA_DEV_NOTIFY_PRE_LINK_CH) {
1181                 ret = media_graph_walk_init(graph,
1182                                                    link->graph_obj.mdev);
1183                 if (ret)
1184                         return ret;
1185                 if (!(flags & MEDIA_LNK_FL_ENABLED))
1186                         ret = __fimc_md_modify_pipelines(sink, false, graph);
1187 #if 0
1188                 else
1189                         /* TODO: Link state change validation */
1190 #endif
1191         /* After link activation */
1192         } else if (notification == MEDIA_DEV_NOTIFY_POST_LINK_CH) {
1193                 if (link->flags & MEDIA_LNK_FL_ENABLED)
1194                         ret = __fimc_md_modify_pipelines(sink, true, graph);
1195                 media_graph_walk_cleanup(graph);
1196         }
1197
1198         return ret ? -EPIPE : 0;
1199 }
1200
1201 static const struct media_device_ops fimc_md_ops = {
1202         .link_notify = fimc_md_link_notify,
1203 };
1204
1205 static ssize_t fimc_md_sysfs_show(struct device *dev,
1206                                   struct device_attribute *attr, char *buf)
1207 {
1208         struct fimc_md *fmd = dev_get_drvdata(dev);
1209
1210         if (fmd->user_subdev_api)
1211                 return strlcpy(buf, "Sub-device API (sub-dev)\n", PAGE_SIZE);
1212
1213         return strlcpy(buf, "V4L2 video node only API (vid-dev)\n", PAGE_SIZE);
1214 }
1215
1216 static ssize_t fimc_md_sysfs_store(struct device *dev,
1217                                    struct device_attribute *attr,
1218                                    const char *buf, size_t count)
1219 {
1220         struct fimc_md *fmd = dev_get_drvdata(dev);
1221         bool subdev_api;
1222         int i;
1223
1224         if (!strcmp(buf, "vid-dev\n"))
1225                 subdev_api = false;
1226         else if (!strcmp(buf, "sub-dev\n"))
1227                 subdev_api = true;
1228         else
1229                 return count;
1230
1231         fmd->user_subdev_api = subdev_api;
1232         for (i = 0; i < FIMC_MAX_DEVS; i++)
1233                 if (fmd->fimc[i])
1234                         fmd->fimc[i]->vid_cap.user_subdev_api = subdev_api;
1235         return count;
1236 }
1237 /*
1238  * This device attribute is to select video pipeline configuration method.
1239  * There are following valid values:
1240  *  vid-dev - for V4L2 video node API only, subdevice will be configured
1241  *  by the host driver.
1242  *  sub-dev - for media controller API, subdevs must be configured in user
1243  *  space before starting streaming.
1244  */
1245 static DEVICE_ATTR(subdev_conf_mode, S_IWUSR | S_IRUGO,
1246                    fimc_md_sysfs_show, fimc_md_sysfs_store);
1247
1248 static int fimc_md_get_pinctrl(struct fimc_md *fmd)
1249 {
1250         struct device *dev = &fmd->pdev->dev;
1251         struct fimc_pinctrl *pctl = &fmd->pinctl;
1252
1253         pctl->pinctrl = devm_pinctrl_get(dev);
1254         if (IS_ERR(pctl->pinctrl))
1255                 return PTR_ERR(pctl->pinctrl);
1256
1257         pctl->state_default = pinctrl_lookup_state(pctl->pinctrl,
1258                                         PINCTRL_STATE_DEFAULT);
1259         if (IS_ERR(pctl->state_default))
1260                 return PTR_ERR(pctl->state_default);
1261
1262         /* PINCTRL_STATE_IDLE is optional */
1263         pctl->state_idle = pinctrl_lookup_state(pctl->pinctrl,
1264                                         PINCTRL_STATE_IDLE);
1265         return 0;
1266 }
1267
1268 static int cam_clk_prepare(struct clk_hw *hw)
1269 {
1270         struct cam_clk *camclk = to_cam_clk(hw);
1271         int ret;
1272
1273         if (camclk->fmd->pmf == NULL)
1274                 return -ENODEV;
1275
1276         ret = pm_runtime_get_sync(camclk->fmd->pmf);
1277         return ret < 0 ? ret : 0;
1278 }
1279
1280 static void cam_clk_unprepare(struct clk_hw *hw)
1281 {
1282         struct cam_clk *camclk = to_cam_clk(hw);
1283
1284         if (camclk->fmd->pmf == NULL)
1285                 return;
1286
1287         pm_runtime_put_sync(camclk->fmd->pmf);
1288 }
1289
1290 static const struct clk_ops cam_clk_ops = {
1291         .prepare = cam_clk_prepare,
1292         .unprepare = cam_clk_unprepare,
1293 };
1294
1295 static void fimc_md_unregister_clk_provider(struct fimc_md *fmd)
1296 {
1297         struct cam_clk_provider *cp = &fmd->clk_provider;
1298         unsigned int i;
1299
1300         if (cp->of_node)
1301                 of_clk_del_provider(cp->of_node);
1302
1303         for (i = 0; i < cp->num_clocks; i++)
1304                 clk_unregister(cp->clks[i]);
1305 }
1306
1307 static int fimc_md_register_clk_provider(struct fimc_md *fmd)
1308 {
1309         struct cam_clk_provider *cp = &fmd->clk_provider;
1310         struct device *dev = &fmd->pdev->dev;
1311         int i, ret;
1312
1313         for (i = 0; i < FIMC_MAX_CAMCLKS; i++) {
1314                 struct cam_clk *camclk = &cp->camclk[i];
1315                 struct clk_init_data init;
1316                 const char *p_name;
1317
1318                 ret = of_property_read_string_index(dev->of_node,
1319                                         "clock-output-names", i, &init.name);
1320                 if (ret < 0)
1321                         break;
1322
1323                 p_name = __clk_get_name(fmd->camclk[i].clock);
1324
1325                 /* It's safe since clk_register() will duplicate the string. */
1326                 init.parent_names = &p_name;
1327                 init.num_parents = 1;
1328                 init.ops = &cam_clk_ops;
1329                 init.flags = CLK_SET_RATE_PARENT;
1330                 camclk->hw.init = &init;
1331                 camclk->fmd = fmd;
1332
1333                 cp->clks[i] = clk_register(NULL, &camclk->hw);
1334                 if (IS_ERR(cp->clks[i])) {
1335                         dev_err(dev, "failed to register clock: %s (%ld)\n",
1336                                         init.name, PTR_ERR(cp->clks[i]));
1337                         ret = PTR_ERR(cp->clks[i]);
1338                         goto err;
1339                 }
1340                 cp->num_clocks++;
1341         }
1342
1343         if (cp->num_clocks == 0) {
1344                 dev_warn(dev, "clk provider not registered\n");
1345                 return 0;
1346         }
1347
1348         cp->clk_data.clks = cp->clks;
1349         cp->clk_data.clk_num = cp->num_clocks;
1350         cp->of_node = dev->of_node;
1351         ret = of_clk_add_provider(dev->of_node, of_clk_src_onecell_get,
1352                                   &cp->clk_data);
1353         if (ret == 0)
1354                 return 0;
1355 err:
1356         fimc_md_unregister_clk_provider(fmd);
1357         return ret;
1358 }
1359
1360 static int subdev_notifier_bound(struct v4l2_async_notifier *notifier,
1361                                  struct v4l2_subdev *subdev,
1362                                  struct v4l2_async_subdev *asd)
1363 {
1364         struct fimc_md *fmd = notifier_to_fimc_md(notifier);
1365         struct fimc_sensor_info *si = NULL;
1366         int i;
1367
1368         /* Find platform data for this sensor subdev */
1369         for (i = 0; i < ARRAY_SIZE(fmd->sensor); i++)
1370                 if (fmd->sensor[i].asd.match.fwnode ==
1371                     of_fwnode_handle(subdev->dev->of_node))
1372                         si = &fmd->sensor[i];
1373
1374         if (si == NULL)
1375                 return -EINVAL;
1376
1377         v4l2_set_subdev_hostdata(subdev, &si->pdata);
1378
1379         if (si->pdata.fimc_bus_type == FIMC_BUS_TYPE_ISP_WRITEBACK)
1380                 subdev->grp_id = GRP_ID_FIMC_IS_SENSOR;
1381         else
1382                 subdev->grp_id = GRP_ID_SENSOR;
1383
1384         si->subdev = subdev;
1385
1386         v4l2_info(&fmd->v4l2_dev, "Registered sensor subdevice: %s (%d)\n",
1387                   subdev->name, fmd->num_sensors);
1388
1389         fmd->num_sensors++;
1390
1391         return 0;
1392 }
1393
1394 static int subdev_notifier_complete(struct v4l2_async_notifier *notifier)
1395 {
1396         struct fimc_md *fmd = notifier_to_fimc_md(notifier);
1397         int ret;
1398
1399         mutex_lock(&fmd->media_dev.graph_mutex);
1400
1401         ret = fimc_md_create_links(fmd);
1402         if (ret < 0)
1403                 goto unlock;
1404
1405         ret = v4l2_device_register_subdev_nodes(&fmd->v4l2_dev);
1406 unlock:
1407         mutex_unlock(&fmd->media_dev.graph_mutex);
1408         if (ret < 0)
1409                 return ret;
1410
1411         return media_device_register(&fmd->media_dev);
1412 }
1413
1414 static const struct v4l2_async_notifier_operations subdev_notifier_ops = {
1415         .bound = subdev_notifier_bound,
1416         .complete = subdev_notifier_complete,
1417 };
1418
1419 static int fimc_md_probe(struct platform_device *pdev)
1420 {
1421         struct device *dev = &pdev->dev;
1422         struct v4l2_device *v4l2_dev;
1423         struct fimc_md *fmd;
1424         int ret;
1425
1426         fmd = devm_kzalloc(dev, sizeof(*fmd), GFP_KERNEL);
1427         if (!fmd)
1428                 return -ENOMEM;
1429
1430         spin_lock_init(&fmd->slock);
1431         INIT_LIST_HEAD(&fmd->pipelines);
1432         fmd->pdev = pdev;
1433
1434         strlcpy(fmd->media_dev.model, "SAMSUNG S5P FIMC",
1435                 sizeof(fmd->media_dev.model));
1436         fmd->media_dev.ops = &fimc_md_ops;
1437         fmd->media_dev.dev = dev;
1438
1439         v4l2_dev = &fmd->v4l2_dev;
1440         v4l2_dev->mdev = &fmd->media_dev;
1441         v4l2_dev->notify = fimc_sensor_notify;
1442         strlcpy(v4l2_dev->name, "s5p-fimc-md", sizeof(v4l2_dev->name));
1443
1444         fmd->use_isp = fimc_md_is_isp_available(dev->of_node);
1445         fmd->user_subdev_api = true;
1446
1447         media_device_init(&fmd->media_dev);
1448
1449         ret = v4l2_device_register(dev, &fmd->v4l2_dev);
1450         if (ret < 0) {
1451                 v4l2_err(v4l2_dev, "Failed to register v4l2_device: %d\n", ret);
1452                 return ret;
1453         }
1454
1455         ret = fimc_md_get_clocks(fmd);
1456         if (ret)
1457                 goto err_md;
1458
1459         ret = fimc_md_get_pinctrl(fmd);
1460         if (ret < 0) {
1461                 if (ret != EPROBE_DEFER)
1462                         dev_err(dev, "Failed to get pinctrl: %d\n", ret);
1463                 goto err_clk;
1464         }
1465
1466         platform_set_drvdata(pdev, fmd);
1467
1468         ret = fimc_md_register_platform_entities(fmd, dev->of_node);
1469         if (ret)
1470                 goto err_clk;
1471
1472         ret = fimc_md_register_sensor_entities(fmd);
1473         if (ret)
1474                 goto err_m_ent;
1475
1476         ret = device_create_file(&pdev->dev, &dev_attr_subdev_conf_mode);
1477         if (ret)
1478                 goto err_m_ent;
1479         /*
1480          * FIMC platform devices need to be registered before the sclk_cam
1481          * clocks provider, as one of these devices needs to be activated
1482          * to enable the clock.
1483          */
1484         ret = fimc_md_register_clk_provider(fmd);
1485         if (ret < 0) {
1486                 v4l2_err(v4l2_dev, "clock provider registration failed\n");
1487                 goto err_attr;
1488         }
1489
1490         if (fmd->num_sensors > 0) {
1491                 fmd->subdev_notifier.subdevs = fmd->async_subdevs;
1492                 fmd->subdev_notifier.num_subdevs = fmd->num_sensors;
1493                 fmd->subdev_notifier.ops = &subdev_notifier_ops;
1494                 fmd->num_sensors = 0;
1495
1496                 ret = v4l2_async_notifier_register(&fmd->v4l2_dev,
1497                                                 &fmd->subdev_notifier);
1498                 if (ret)
1499                         goto err_clk_p;
1500         }
1501
1502         return 0;
1503
1504 err_clk_p:
1505         fimc_md_unregister_clk_provider(fmd);
1506 err_attr:
1507         device_remove_file(&pdev->dev, &dev_attr_subdev_conf_mode);
1508 err_clk:
1509         fimc_md_put_clocks(fmd);
1510 err_m_ent:
1511         fimc_md_unregister_entities(fmd);
1512 err_md:
1513         media_device_cleanup(&fmd->media_dev);
1514         v4l2_device_unregister(&fmd->v4l2_dev);
1515         return ret;
1516 }
1517
1518 static int fimc_md_remove(struct platform_device *pdev)
1519 {
1520         struct fimc_md *fmd = platform_get_drvdata(pdev);
1521
1522         if (!fmd)
1523                 return 0;
1524
1525         fimc_md_unregister_clk_provider(fmd);
1526         v4l2_async_notifier_unregister(&fmd->subdev_notifier);
1527
1528         v4l2_device_unregister(&fmd->v4l2_dev);
1529         device_remove_file(&pdev->dev, &dev_attr_subdev_conf_mode);
1530         fimc_md_unregister_entities(fmd);
1531         fimc_md_pipelines_free(fmd);
1532         media_device_unregister(&fmd->media_dev);
1533         media_device_cleanup(&fmd->media_dev);
1534         fimc_md_put_clocks(fmd);
1535
1536         return 0;
1537 }
1538
1539 static const struct platform_device_id fimc_driver_ids[] __always_unused = {
1540         { .name = "s5p-fimc-md" },
1541         { },
1542 };
1543 MODULE_DEVICE_TABLE(platform, fimc_driver_ids);
1544
1545 static const struct of_device_id fimc_md_of_match[] = {
1546         { .compatible = "samsung,fimc" },
1547         { },
1548 };
1549 MODULE_DEVICE_TABLE(of, fimc_md_of_match);
1550
1551 static struct platform_driver fimc_md_driver = {
1552         .probe          = fimc_md_probe,
1553         .remove         = fimc_md_remove,
1554         .driver = {
1555                 .of_match_table = of_match_ptr(fimc_md_of_match),
1556                 .name           = "s5p-fimc-md",
1557         }
1558 };
1559
1560 static int __init fimc_md_init(void)
1561 {
1562         int ret;
1563
1564         request_module("s5p-csis");
1565         ret = fimc_register_driver();
1566         if (ret)
1567                 return ret;
1568
1569         ret = platform_driver_register(&fimc_md_driver);
1570         if (ret)
1571                 fimc_unregister_driver();
1572
1573         return ret;
1574 }
1575
1576 static void __exit fimc_md_exit(void)
1577 {
1578         platform_driver_unregister(&fimc_md_driver);
1579         fimc_unregister_driver();
1580 }
1581
1582 module_init(fimc_md_init);
1583 module_exit(fimc_md_exit);
1584
1585 MODULE_AUTHOR("Sylwester Nawrocki <s.nawrocki@samsung.com>");
1586 MODULE_DESCRIPTION("S5P FIMC camera host interface/video postprocessor driver");
1587 MODULE_LICENSE("GPL");
1588 MODULE_VERSION("2.0.1");