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-of.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_open - update the pipeline information, enable power
 190  *                        of all pipeline subdevs and the sensor clock
 191  * @me: media entity to start graph walk with
 192  * @prepare: true to walk the current pipeline and acquire all subdevs
 193  *
 194  * Called with the graph mutex held.
 195  */
 196 static int __fimc_pipeline_open(struct exynos_media_pipeline *ep,
 197                                 struct media_entity *me, bool prepare)
 198 {
 199         struct fimc_md *fmd = entity_to_fimc_mdev(me);
 200         struct fimc_pipeline *p = to_fimc_pipeline(ep);
 201         struct v4l2_subdev *sd;
 202         int ret;
 203
 204         if (WARN_ON(p == NULL || me == NULL))
 205                 return -EINVAL;
 206
 207         if (prepare)
 208                 fimc_pipeline_prepare(p, me);
 209
 210         sd = p->subdevs[IDX_SENSOR];
 211         if (sd == NULL)
 212                 return -EINVAL;
 213
 214         /* Disable PXLASYNC clock if this pipeline includes FIMC-IS */
 215         if (!IS_ERR(fmd->wbclk[CLK_IDX_WB_B]) && p->subdevs[IDX_IS_ISP]) {
 216                 ret = clk_prepare_enable(fmd->wbclk[CLK_IDX_WB_B]);
 217                 if (ret < 0)
 218                         return ret;
 219         }
 220
 221         ret = fimc_pipeline_s_power(p, 1);
 222         if (!ret)
 223                 return 0;
 224
 225         if (!IS_ERR(fmd->wbclk[CLK_IDX_WB_B]) && p->subdevs[IDX_IS_ISP])
 226                 clk_disable_unprepare(fmd->wbclk[CLK_IDX_WB_B]);
 227
 228         return ret;
 229 }
 230
 231 /**
 232  * __fimc_pipeline_close - disable the sensor clock and pipeline power
 233  * @fimc: fimc device terminating the pipeline
 234  *
 235  * Disable power of all subdevs and turn the external sensor clock off.
 236  */
 237 static int __fimc_pipeline_close(struct exynos_media_pipeline *ep)
 238 {
 239         struct fimc_pipeline *p = to_fimc_pipeline(ep);
 240         struct v4l2_subdev *sd = p ? p->subdevs[IDX_SENSOR] : NULL;
 241         struct fimc_md *fmd;
 242         int ret;
 243
 244         if (sd == NULL) {
 245                 pr_warn("%s(): No sensor subdev\n", __func__);
 246                 return 0;
 247         }
 248
 249         ret = fimc_pipeline_s_power(p, 0);
 250
 251         fmd = entity_to_fimc_mdev(&sd->entity);
 252
 253         /* Disable PXLASYNC clock if this pipeline includes FIMC-IS */
 254         if (!IS_ERR(fmd->wbclk[CLK_IDX_WB_B]) && p->subdevs[IDX_IS_ISP])
 255                 clk_disable_unprepare(fmd->wbclk[CLK_IDX_WB_B]);
 256
 257         return ret == -ENXIO ? 0 : ret;
 258 }
 259
 260 /**
 261  * __fimc_pipeline_s_stream - call s_stream() on pipeline subdevs
 262  * @pipeline: video pipeline structure
 263  * @on: passed as the s_stream() callback argument
 264  */
 265 static int __fimc_pipeline_s_stream(struct exynos_media_pipeline *ep, bool on)
 266 {
 267         static const u8 seq[2][IDX_MAX] = {
 268                 { IDX_FIMC, IDX_SENSOR, IDX_IS_ISP, IDX_CSIS, IDX_FLITE },
 269                 { IDX_CSIS, IDX_FLITE, IDX_FIMC, IDX_SENSOR, IDX_IS_ISP },
 270         };
 271         struct fimc_pipeline *p = to_fimc_pipeline(ep);
 272         int i, ret = 0;
 273
 274         if (p->subdevs[IDX_SENSOR] == NULL)
 275                 return -ENODEV;
 276
 277         for (i = 0; i < IDX_MAX; i++) {
 278                 unsigned int idx = seq[on][i];
 279
 280                 ret = v4l2_subdev_call(p->subdevs[idx], video, s_stream, on);
 281
 282                 if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV)
 283                         goto error;
 284         }
 285         return 0;
 286 error:
 287         for (; i >= 0; i--) {
 288                 unsigned int idx = seq[on][i];
 289                 v4l2_subdev_call(p->subdevs[idx], video, s_stream, !on);
 290         }
 291         return ret;
 292 }
 293
 294 /* Media pipeline operations for the FIMC/FIMC-LITE video device driver */
 295 static const struct exynos_media_pipeline_ops fimc_pipeline_ops = {
 296         .open           = __fimc_pipeline_open,
 297         .close          = __fimc_pipeline_close,
 298         .set_stream     = __fimc_pipeline_s_stream,
 299 };
 300
 301 static struct exynos_media_pipeline *fimc_md_pipeline_create(
 302                                                 struct fimc_md *fmd)
 303 {
 304         struct fimc_pipeline *p;
 305
 306         p = kzalloc(sizeof(*p), GFP_KERNEL);
 307         if (!p)
 308                 return NULL;
 309
 310         list_add_tail(&p->list, &fmd->pipelines);
 311
 312         p->ep.ops = &fimc_pipeline_ops;
 313         return &p->ep;
 314 }
 315
 316 static void fimc_md_pipelines_free(struct fimc_md *fmd)
 317 {
 318         while (!list_empty(&fmd->pipelines)) {
 319                 struct fimc_pipeline *p;
 320
 321                 p = list_entry(fmd->pipelines.next, typeof(*p), list);
 322                 list_del(&p->list);
 323                 kfree(p);
 324         }
 325 }
 326
 327 /* Parse port node and register as a sub-device any sensor specified there. */
 328 static int fimc_md_parse_port_node(struct fimc_md *fmd,
 329                                    struct device_node *port,
 330                                    unsigned int index)
 331 {
 332         struct fimc_source_info *pd = &fmd->sensor[index].pdata;
 333         struct device_node *rem, *ep, *np;
 334         struct v4l2_of_endpoint endpoint;
 335
 336         /* Assume here a port node can have only one endpoint node. */
 337         ep = of_get_next_child(port, NULL);
 338         if (!ep)
 339                 return 0;
 340
 341         v4l2_of_parse_endpoint(ep, &endpoint);
 342         if (WARN_ON(endpoint.base.port == 0) || index >= FIMC_MAX_SENSORS)
 343                 return -EINVAL;
 344
 345         pd->mux_id = (endpoint.base.port - 1) & 0x1;
 346
 347         rem = of_graph_get_remote_port_parent(ep);
 348         of_node_put(ep);
 349         if (rem == NULL) {
 350                 v4l2_info(&fmd->v4l2_dev, "Remote device at %s not found\n",
 351                                                         ep->full_name);
 352                 return 0;
 353         }
 354
 355         if (fimc_input_is_parallel(endpoint.base.port)) {
 356                 if (endpoint.bus_type == V4L2_MBUS_PARALLEL)
 357                         pd->sensor_bus_type = FIMC_BUS_TYPE_ITU_601;
 358                 else
 359                         pd->sensor_bus_type = FIMC_BUS_TYPE_ITU_656;
 360                 pd->flags = endpoint.bus.parallel.flags;
 361         } else if (fimc_input_is_mipi_csi(endpoint.base.port)) {
 362                 /*
 363                  * MIPI CSI-2: only input mux selection and
 364                  * the sensor's clock frequency is needed.
 365                  */
 366                 pd->sensor_bus_type = FIMC_BUS_TYPE_MIPI_CSI2;
 367         } else {
 368                 v4l2_err(&fmd->v4l2_dev, "Wrong port id (%u) at node %s\n",
 369                          endpoint.base.port, rem->full_name);
 370         }
 371         /*
 372          * For FIMC-IS handled sensors, that are placed under i2c-isp device
 373          * node, FIMC is connected to the FIMC-IS through its ISP Writeback
 374          * input. Sensors are attached to the FIMC-LITE hostdata interface
 375          * directly or through MIPI-CSIS, depending on the external media bus
 376          * used. This needs to be handled in a more reliable way, not by just
 377          * checking parent's node name.
 378          */
 379         np = of_get_parent(rem);
 380
 381         if (np && !of_node_cmp(np->name, "i2c-isp"))
 382                 pd->fimc_bus_type = FIMC_BUS_TYPE_ISP_WRITEBACK;
 383         else
 384                 pd->fimc_bus_type = pd->sensor_bus_type;
 385
 386         if (WARN_ON(index >= ARRAY_SIZE(fmd->sensor)))
 387                 return -EINVAL;
 388
 389         fmd->sensor[index].asd.match_type = V4L2_ASYNC_MATCH_OF;
 390         fmd->sensor[index].asd.match.of.node = rem;
 391         fmd->async_subdevs[index] = &fmd->sensor[index].asd;
 392
 393         fmd->num_sensors++;
 394
 395         of_node_put(rem);
 396         return 0;
 397 }
 398
 399 /* Register all SoC external sub-devices */
 400 static int fimc_md_register_sensor_entities(struct fimc_md *fmd)
 401 {
 402         struct device_node *parent = fmd->pdev->dev.of_node;
 403         struct device_node *node, *ports;
 404         int index = 0;
 405         int ret;
 406
 407         /*
 408          * Runtime resume one of the FIMC entities to make sure
 409          * the sclk_cam clocks are not globally disabled.
 410          */
 411         if (!fmd->pmf)
 412                 return -ENXIO;
 413
 414         ret = pm_runtime_get_sync(fmd->pmf);
 415         if (ret < 0)
 416                 return ret;
 417
 418         fmd->num_sensors = 0;
 419
 420         /* Attach sensors linked to MIPI CSI-2 receivers */
 421         for_each_available_child_of_node(parent, node) {
 422                 struct device_node *port;
 423
 424                 if (of_node_cmp(node->name, "csis"))
 425                         continue;
 426                 /* The csis node can have only port subnode. */
 427                 port = of_get_next_child(node, NULL);
 428                 if (!port)
 429                         continue;
 430
 431                 ret = fimc_md_parse_port_node(fmd, port, index);
 432                 if (ret < 0)
 433                         goto rpm_put;
 434                 index++;
 435         }
 436
 437         /* Attach sensors listed in the parallel-ports node */
 438         ports = of_get_child_by_name(parent, "parallel-ports");
 439         if (!ports)
 440                 goto rpm_put;
 441
 442         for_each_child_of_node(ports, node) {
 443                 ret = fimc_md_parse_port_node(fmd, node, index);
 444                 if (ret < 0)
 445                         break;
 446                 index++;
 447         }
 448 rpm_put:
 449         pm_runtime_put(fmd->pmf);
 450         return ret;
 451 }
 452
 453 static int __of_get_csis_id(struct device_node *np)
 454 {
 455         u32 reg = 0;
 456
 457         np = of_get_child_by_name(np, "port");
 458         if (!np)
 459                 return -EINVAL;
 460         of_property_read_u32(np, "reg", &reg);
 461         return reg - FIMC_INPUT_MIPI_CSI2_0;
 462 }
 463
 464 /*
 465  * MIPI-CSIS, FIMC and FIMC-LITE platform devices registration.
 466  */
 467 static int register_fimc_lite_entity(struct fimc_md *fmd,
 468                                      struct fimc_lite *fimc_lite)
 469 {
 470         struct v4l2_subdev *sd;
 471         struct exynos_media_pipeline *ep;
 472         int ret;
 473
 474         if (WARN_ON(fimc_lite->index >= FIMC_LITE_MAX_DEVS ||
 475                     fmd->fimc_lite[fimc_lite->index]))
 476                 return -EBUSY;
 477
 478         sd = &fimc_lite->subdev;
 479         sd->grp_id = GRP_ID_FLITE;
 480
 481         ep = fimc_md_pipeline_create(fmd);
 482         if (!ep)
 483                 return -ENOMEM;
 484
 485         v4l2_set_subdev_hostdata(sd, ep);
 486
 487         ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd);
 488         if (!ret)
 489                 fmd->fimc_lite[fimc_lite->index] = fimc_lite;
 490         else
 491                 v4l2_err(&fmd->v4l2_dev, "Failed to register FIMC.LITE%d\n",
 492                          fimc_lite->index);
 493         return ret;
 494 }
 495
 496 static int register_fimc_entity(struct fimc_md *fmd, struct fimc_dev *fimc)
 497 {
 498         struct v4l2_subdev *sd;
 499         struct exynos_media_pipeline *ep;
 500         int ret;
 501
 502         if (WARN_ON(fimc->id >= FIMC_MAX_DEVS || fmd->fimc[fimc->id]))
 503                 return -EBUSY;
 504
 505         sd = &fimc->vid_cap.subdev;
 506         sd->grp_id = GRP_ID_FIMC;
 507
 508         ep = fimc_md_pipeline_create(fmd);
 509         if (!ep)
 510                 return -ENOMEM;
 511
 512         v4l2_set_subdev_hostdata(sd, ep);
 513
 514         ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd);
 515         if (!ret) {
 516                 if (!fmd->pmf && fimc->pdev)
 517                         fmd->pmf = &fimc->pdev->dev;
 518                 fmd->fimc[fimc->id] = fimc;
 519                 fimc->vid_cap.user_subdev_api = fmd->user_subdev_api;
 520         } else {
 521                 v4l2_err(&fmd->v4l2_dev, "Failed to register FIMC.%d (%d)\n",
 522                          fimc->id, ret);
 523         }
 524         return ret;
 525 }
 526
 527 static int register_csis_entity(struct fimc_md *fmd,
 528                                 struct platform_device *pdev,
 529                                 struct v4l2_subdev *sd)
 530 {
 531         struct device_node *node = pdev->dev.of_node;
 532         int id, ret;
 533
 534         id = node ? __of_get_csis_id(node) : max(0, pdev->id);
 535
 536         if (WARN_ON(id < 0 || id >= CSIS_MAX_ENTITIES))
 537                 return -ENOENT;
 538
 539         if (WARN_ON(fmd->csis[id].sd))
 540                 return -EBUSY;
 541
 542         sd->grp_id = GRP_ID_CSIS;
 543         ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd);
 544         if (!ret)
 545                 fmd->csis[id].sd = sd;
 546         else
 547                 v4l2_err(&fmd->v4l2_dev,
 548                          "Failed to register MIPI-CSIS.%d (%d)\n", id, ret);
 549         return ret;
 550 }
 551
 552 static int register_fimc_is_entity(struct fimc_md *fmd, struct fimc_is *is)
 553 {
 554         struct v4l2_subdev *sd = &is->isp.subdev;
 555         struct exynos_media_pipeline *ep;
 556         int ret;
 557
 558         /* Allocate pipeline object for the ISP capture video node. */
 559         ep = fimc_md_pipeline_create(fmd);
 560         if (!ep)
 561                 return -ENOMEM;
 562
 563         v4l2_set_subdev_hostdata(sd, ep);
 564
 565         ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd);
 566         if (ret) {
 567                 v4l2_err(&fmd->v4l2_dev,
 568                          "Failed to register FIMC-ISP (%d)\n", ret);
 569                 return ret;
 570         }
 571
 572         fmd->fimc_is = is;
 573         return 0;
 574 }
 575
 576 static int fimc_md_register_platform_entity(struct fimc_md *fmd,
 577                                             struct platform_device *pdev,
 578                                             int plat_entity)
 579 {
 580         struct device *dev = &pdev->dev;
 581         int ret = -EPROBE_DEFER;
 582         void *drvdata;
 583
 584         /* Lock to ensure dev->driver won't change. */
 585         device_lock(dev);
 586
 587         if (!dev->driver || !try_module_get(dev->driver->owner))
 588                 goto dev_unlock;
 589
 590         drvdata = dev_get_drvdata(dev);
 591         /* Some subdev didn't probe successfully id drvdata is NULL */
 592         if (drvdata) {
 593                 switch (plat_entity) {
 594                 case IDX_FIMC:
 595                         ret = register_fimc_entity(fmd, drvdata);
 596                         break;
 597                 case IDX_FLITE:
 598                         ret = register_fimc_lite_entity(fmd, drvdata);
 599                         break;
 600                 case IDX_CSIS:
 601                         ret = register_csis_entity(fmd, pdev, drvdata);
 602                         break;
 603                 case IDX_IS_ISP:
 604                         ret = register_fimc_is_entity(fmd, drvdata);
 605                         break;
 606                 default:
 607                         ret = -ENODEV;
 608                 }
 609         }
 610
 611         module_put(dev->driver->owner);
 612 dev_unlock:
 613         device_unlock(dev);
 614         if (ret == -EPROBE_DEFER)
 615                 dev_info(&fmd->pdev->dev, "deferring %s device registration\n",
 616                         dev_name(dev));
 617         else if (ret < 0)
 618                 dev_err(&fmd->pdev->dev, "%s device registration failed (%d)\n",
 619                         dev_name(dev), ret);
 620         return ret;
 621 }
 622
 623 /* Register FIMC, FIMC-LITE and CSIS media entities */
 624 static int fimc_md_register_platform_entities(struct fimc_md *fmd,
 625                                               struct device_node *parent)
 626 {
 627         struct device_node *node;
 628         int ret = 0;
 629
 630         for_each_available_child_of_node(parent, node) {
 631                 struct platform_device *pdev;
 632                 int plat_entity = -1;
 633
 634                 pdev = of_find_device_by_node(node);
 635                 if (!pdev)
 636                         continue;
 637
 638                 /* If driver of any entity isn't ready try all again later. */
 639                 if (!strcmp(node->name, CSIS_OF_NODE_NAME))
 640                         plat_entity = IDX_CSIS;
 641                 else if (!strcmp(node->name, FIMC_IS_OF_NODE_NAME))
 642                         plat_entity = IDX_IS_ISP;
 643                 else if (!strcmp(node->name, FIMC_LITE_OF_NODE_NAME))
 644                         plat_entity = IDX_FLITE;
 645                 else if (!strcmp(node->name, FIMC_OF_NODE_NAME) &&
 646                          !of_property_read_bool(node, "samsung,lcd-wb"))
 647                         plat_entity = IDX_FIMC;
 648
 649                 if (plat_entity >= 0)
 650                         ret = fimc_md_register_platform_entity(fmd, pdev,
 651                                                         plat_entity);
 652                 put_device(&pdev->dev);
 653                 if (ret < 0)
 654                         break;
 655         }
 656
 657         return ret;
 658 }
 659
 660 static void fimc_md_unregister_entities(struct fimc_md *fmd)
 661 {
 662         int i;
 663
 664         for (i = 0; i < FIMC_MAX_DEVS; i++) {
 665                 struct fimc_dev *dev = fmd->fimc[i];
 666                 if (dev == NULL)
 667                         continue;
 668                 v4l2_device_unregister_subdev(&dev->vid_cap.subdev);
 669                 dev->vid_cap.ve.pipe = NULL;
 670                 fmd->fimc[i] = NULL;
 671         }
 672         for (i = 0; i < FIMC_LITE_MAX_DEVS; i++) {
 673                 struct fimc_lite *dev = fmd->fimc_lite[i];
 674                 if (dev == NULL)
 675                         continue;
 676                 v4l2_device_unregister_subdev(&dev->subdev);
 677                 dev->ve.pipe = NULL;
 678                 fmd->fimc_lite[i] = NULL;
 679         }
 680         for (i = 0; i < CSIS_MAX_ENTITIES; i++) {
 681                 if (fmd->csis[i].sd == NULL)
 682                         continue;
 683                 v4l2_device_unregister_subdev(fmd->csis[i].sd);
 684                 fmd->csis[i].sd = NULL;
 685         }
 686
 687         if (fmd->fimc_is)
 688                 v4l2_device_unregister_subdev(&fmd->fimc_is->isp.subdev);
 689
 690         v4l2_info(&fmd->v4l2_dev, "Unregistered all entities\n");
 691 }
 692
 693 /**
 694  * __fimc_md_create_fimc_links - create links to all FIMC entities
 695  * @fmd: fimc media device
 696  * @source: the source entity to create links to all fimc entities from
 697  * @sensor: sensor subdev linked to FIMC[fimc_id] entity, may be null
 698  * @pad: the source entity pad index
 699  * @link_mask: bitmask of the fimc devices for which link should be enabled
 700  */
 701 static int __fimc_md_create_fimc_sink_links(struct fimc_md *fmd,
 702                                             struct media_entity *source,
 703                                             struct v4l2_subdev *sensor,
 704                                             int pad, int link_mask)
 705 {
 706         struct fimc_source_info *si = NULL;
 707         struct media_entity *sink;
 708         unsigned int flags = 0;
 709         int i, ret = 0;
 710
 711         if (sensor) {
 712                 si = v4l2_get_subdev_hostdata(sensor);
 713                 /* Skip direct FIMC links in the logical FIMC-IS sensor path */
 714                 if (si && si->fimc_bus_type == FIMC_BUS_TYPE_ISP_WRITEBACK)
 715                         ret = 1;
 716         }
 717
 718         for (i = 0; !ret && i < FIMC_MAX_DEVS; i++) {
 719                 if (!fmd->fimc[i])
 720                         continue;
 721                 /*
 722                  * Some FIMC variants are not fitted with camera capture
 723                  * interface. Skip creating a link from sensor for those.
 724                  */
 725                 if (!fmd->fimc[i]->variant->has_cam_if)
 726                         continue;
 727
 728                 flags = ((1 << i) & link_mask) ? MEDIA_LNK_FL_ENABLED : 0;
 729
 730                 sink = &fmd->fimc[i]->vid_cap.subdev.entity;
 731                 ret = media_create_pad_link(source, pad, sink,
 732                                               FIMC_SD_PAD_SINK_CAM, flags);
 733                 if (ret)
 734                         return ret;
 735
 736                 /* Notify FIMC capture subdev entity */
 737                 ret = media_entity_call(sink, link_setup, &sink->pads[0],
 738                                         &source->pads[pad], flags);
 739                 if (ret)
 740                         break;
 741
 742                 v4l2_info(&fmd->v4l2_dev, "created link [%s] %c> [%s]\n",
 743                           source->name, flags ? '=' : '-', sink->name);
 744         }
 745
 746         for (i = 0; i < FIMC_LITE_MAX_DEVS; i++) {
 747                 if (!fmd->fimc_lite[i])
 748                         continue;
 749
 750                 sink = &fmd->fimc_lite[i]->subdev.entity;
 751                 ret = media_create_pad_link(source, pad, sink,
 752                                                FLITE_SD_PAD_SINK, 0);
 753                 if (ret)
 754                         return ret;
 755
 756                 /* Notify FIMC-LITE subdev entity */
 757                 ret = media_entity_call(sink, link_setup, &sink->pads[0],
 758                                         &source->pads[pad], 0);
 759                 if (ret)
 760                         break;
 761
 762                 v4l2_info(&fmd->v4l2_dev, "created link [%s] -> [%s]\n",
 763                           source->name, sink->name);
 764         }
 765         return 0;
 766 }
 767
 768 /* Create links from FIMC-LITE source pads to other entities */
 769 static int __fimc_md_create_flite_source_links(struct fimc_md *fmd)
 770 {
 771         struct media_entity *source, *sink;
 772         int i, ret = 0;
 773
 774         for (i = 0; i < FIMC_LITE_MAX_DEVS; i++) {
 775                 struct fimc_lite *fimc = fmd->fimc_lite[i];
 776
 777                 if (fimc == NULL)
 778                         continue;
 779
 780                 source = &fimc->subdev.entity;
 781                 sink = &fimc->ve.vdev.entity;
 782                 /* FIMC-LITE's subdev and video node */
 783                 ret = media_create_pad_link(source, FLITE_SD_PAD_SOURCE_DMA,
 784                                                sink, 0, 0);
 785                 if (ret)
 786                         break;
 787                 /* Link from FIMC-LITE to IS-ISP subdev */
 788                 sink = &fmd->fimc_is->isp.subdev.entity;
 789                 ret = media_create_pad_link(source, FLITE_SD_PAD_SOURCE_ISP,
 790                                                sink, 0, 0);
 791                 if (ret)
 792                         break;
 793         }
 794
 795         return ret;
 796 }
 797
 798 /* Create FIMC-IS links */
 799 static int __fimc_md_create_fimc_is_links(struct fimc_md *fmd)
 800 {
 801         struct fimc_isp *isp = &fmd->fimc_is->isp;
 802         struct media_entity *source, *sink;
 803         int i, ret;
 804
 805         source = &isp->subdev.entity;
 806
 807         for (i = 0; i < FIMC_MAX_DEVS; i++) {
 808                 if (fmd->fimc[i] == NULL)
 809                         continue;
 810
 811                 /* Link from FIMC-IS-ISP subdev to FIMC */
 812                 sink = &fmd->fimc[i]->vid_cap.subdev.entity;
 813                 ret = media_create_pad_link(source, FIMC_ISP_SD_PAD_SRC_FIFO,
 814                                                sink, FIMC_SD_PAD_SINK_FIFO, 0);
 815                 if (ret)
 816                         return ret;
 817         }
 818
 819         /* Link from FIMC-IS-ISP subdev to fimc-is-isp.capture video node */
 820         sink = &isp->video_capture.ve.vdev.entity;
 821
 822         /* Skip this link if the fimc-is-isp video node driver isn't built-in */
 823         if (sink->num_pads == 0)
 824                 return 0;
 825
 826         return media_create_pad_link(source, FIMC_ISP_SD_PAD_SRC_DMA,
 827                                         sink, 0, 0);
 828 }
 829
 830 /**
 831  * fimc_md_create_links - create default links between registered entities
 832  *
 833  * Parallel interface sensor entities are connected directly to FIMC capture
 834  * entities. The sensors using MIPI CSIS bus are connected through immutable
 835  * link with CSI receiver entity specified by mux_id. Any registered CSIS
 836  * entity has a link to each registered FIMC capture entity. Enabled links
 837  * are created by default between each subsequent registered sensor and
 838  * subsequent FIMC capture entity. The number of default active links is
 839  * determined by the number of available sensors or FIMC entities,
 840  * whichever is less.
 841  */
 842 static int fimc_md_create_links(struct fimc_md *fmd)
 843 {
 844         struct v4l2_subdev *csi_sensors[CSIS_MAX_ENTITIES] = { NULL };
 845         struct v4l2_subdev *sensor, *csis;
 846         struct fimc_source_info *pdata;
 847         struct media_entity *source, *sink;
 848         int i, pad, fimc_id = 0, ret = 0;
 849         u32 flags, link_mask = 0;
 850
 851         for (i = 0; i < fmd->num_sensors; i++) {
 852                 if (fmd->sensor[i].subdev == NULL)
 853                         continue;
 854
 855                 sensor = fmd->sensor[i].subdev;
 856                 pdata = v4l2_get_subdev_hostdata(sensor);
 857                 if (!pdata)
 858                         continue;
 859
 860                 source = NULL;
 861
 862                 switch (pdata->sensor_bus_type) {
 863                 case FIMC_BUS_TYPE_MIPI_CSI2:
 864                         if (WARN(pdata->mux_id >= CSIS_MAX_ENTITIES,
 865                                 "Wrong CSI channel id: %d\n", pdata->mux_id))
 866                                 return -EINVAL;
 867
 868                         csis = fmd->csis[pdata->mux_id].sd;
 869                         if (WARN(csis == NULL,
 870                                  "MIPI-CSI interface specified "
 871                                  "but s5p-csis module is not loaded!\n"))
 872                                 return -EINVAL;
 873
 874                         pad = sensor->entity.num_pads - 1;
 875                         ret = media_create_pad_link(&sensor->entity, pad,
 876                                               &csis->entity, CSIS_PAD_SINK,
 877                                               MEDIA_LNK_FL_IMMUTABLE |
 878                                               MEDIA_LNK_FL_ENABLED);
 879                         if (ret)
 880                                 return ret;
 881
 882                         v4l2_info(&fmd->v4l2_dev, "created link [%s] => [%s]\n",
 883                                   sensor->entity.name, csis->entity.name);
 884
 885                         source = NULL;
 886                         csi_sensors[pdata->mux_id] = sensor;
 887                         break;
 888
 889                 case FIMC_BUS_TYPE_ITU_601...FIMC_BUS_TYPE_ITU_656:
 890                         source = &sensor->entity;
 891                         pad = 0;
 892                         break;
 893
 894                 default:
 895                         v4l2_err(&fmd->v4l2_dev, "Wrong bus_type: %x\n",
 896                                  pdata->sensor_bus_type);
 897                         return -EINVAL;
 898                 }
 899                 if (source == NULL)
 900                         continue;
 901
 902                 link_mask = 1 << fimc_id++;
 903                 ret = __fimc_md_create_fimc_sink_links(fmd, source, sensor,
 904                                                        pad, link_mask);
 905         }
 906
 907         for (i = 0; i < CSIS_MAX_ENTITIES; i++) {
 908                 if (fmd->csis[i].sd == NULL)
 909                         continue;
 910
 911                 source = &fmd->csis[i].sd->entity;
 912                 pad = CSIS_PAD_SOURCE;
 913                 sensor = csi_sensors[i];
 914
 915                 link_mask = 1 << fimc_id++;
 916                 ret = __fimc_md_create_fimc_sink_links(fmd, source, sensor,
 917                                                        pad, link_mask);
 918         }
 919
 920         /* Create immutable links between each FIMC's subdev and video node */
 921         flags = MEDIA_LNK_FL_IMMUTABLE | MEDIA_LNK_FL_ENABLED;
 922         for (i = 0; i < FIMC_MAX_DEVS; i++) {
 923                 if (!fmd->fimc[i])
 924                         continue;
 925
 926                 source = &fmd->fimc[i]->vid_cap.subdev.entity;
 927                 sink = &fmd->fimc[i]->vid_cap.ve.vdev.entity;
 928
 929                 ret = media_create_pad_link(source, FIMC_SD_PAD_SOURCE,
 930                                               sink, 0, flags);
 931                 if (ret)
 932                         break;
 933         }
 934
 935         ret = __fimc_md_create_flite_source_links(fmd);
 936         if (ret < 0)
 937                 return ret;
 938
 939         if (fmd->use_isp)
 940                 ret = __fimc_md_create_fimc_is_links(fmd);
 941
 942         return ret;
 943 }
 944
 945 /*
 946  * The peripheral sensor and CAM_BLK (PIXELASYNCMx) clocks management.
 947  */
 948 static void fimc_md_put_clocks(struct fimc_md *fmd)
 949 {
 950         int i = FIMC_MAX_CAMCLKS;
 951
 952         while (--i >= 0) {
 953                 if (IS_ERR(fmd->camclk[i].clock))
 954                         continue;
 955                 clk_put(fmd->camclk[i].clock);
 956                 fmd->camclk[i].clock = ERR_PTR(-EINVAL);
 957         }
 958
 959         /* Writeback (PIXELASYNCMx) clocks */
 960         for (i = 0; i < FIMC_MAX_WBCLKS; i++) {
 961                 if (IS_ERR(fmd->wbclk[i]))
 962                         continue;
 963                 clk_put(fmd->wbclk[i]);
 964                 fmd->wbclk[i] = ERR_PTR(-EINVAL);
 965         }
 966 }
 967
 968 static int fimc_md_get_clocks(struct fimc_md *fmd)
 969 {
 970         struct device *dev = &fmd->pdev->dev;
 971         char clk_name[32];
 972         struct clk *clock;
 973         int i, ret = 0;
 974
 975         for (i = 0; i < FIMC_MAX_CAMCLKS; i++)
 976                 fmd->camclk[i].clock = ERR_PTR(-EINVAL);
 977
 978         for (i = 0; i < FIMC_MAX_CAMCLKS; i++) {
 979                 snprintf(clk_name, sizeof(clk_name), "sclk_cam%u", i);
 980                 clock = clk_get(dev, clk_name);
 981
 982                 if (IS_ERR(clock)) {
 983                         dev_err(dev, "Failed to get clock: %s\n", clk_name);
 984                         ret = PTR_ERR(clock);
 985                         break;
 986                 }
 987                 fmd->camclk[i].clock = clock;
 988         }
 989         if (ret)
 990                 fimc_md_put_clocks(fmd);
 991
 992         if (!fmd->use_isp)
 993                 return 0;
 994         /*
 995          * For now get only PIXELASYNCM1 clock (Writeback B/ISP),
 996          * leave PIXELASYNCM0 out for the LCD Writeback driver.
 997          */
 998         fmd->wbclk[CLK_IDX_WB_A] = ERR_PTR(-EINVAL);
 999
1000         for (i = CLK_IDX_WB_B; i < FIMC_MAX_WBCLKS; i++) {
1001                 snprintf(clk_name, sizeof(clk_name), "pxl_async%u", i);
1002                 clock = clk_get(dev, clk_name);
1003                 if (IS_ERR(clock)) {
1004                         v4l2_err(&fmd->v4l2_dev, "Failed to get clock: %s\n",
1005                                   clk_name);
1006                         ret = PTR_ERR(clock);
1007                         break;
1008                 }
1009                 fmd->wbclk[i] = clock;
1010         }
1011         if (ret)
1012                 fimc_md_put_clocks(fmd);
1013
1014         return ret;
1015 }
1016
1017 static int __fimc_md_modify_pipeline(struct media_entity *entity, bool enable)
1018 {
1019         struct exynos_video_entity *ve;
1020         struct fimc_pipeline *p;
1021         struct video_device *vdev;
1022         int ret;
1023
1024         vdev = media_entity_to_video_device(entity);
1025         if (vdev->entity.use_count == 0)
1026                 return 0;
1027
1028         ve = vdev_to_exynos_video_entity(vdev);
1029         p = to_fimc_pipeline(ve->pipe);
1030         /*
1031          * Nothing to do if we are disabling the pipeline, some link
1032          * has been disconnected and p->subdevs array is cleared now.
1033          */
1034         if (!enable && p->subdevs[IDX_SENSOR] == NULL)
1035                 return 0;
1036
1037         if (enable)
1038                 ret = __fimc_pipeline_open(ve->pipe, entity, true);
1039         else
1040                 ret = __fimc_pipeline_close(ve->pipe);
1041
1042         if (ret == 0 && !enable)
1043                 memset(p->subdevs, 0, sizeof(p->subdevs));
1044
1045         return ret;
1046 }
1047
1048 /* Locking: called with entity->graph_obj.mdev->graph_mutex mutex held. */
1049 static int __fimc_md_modify_pipelines(struct media_entity *entity, bool enable,
1050                                       struct media_entity_graph *graph)
1051 {
1052         struct media_entity *entity_err = entity;
1053         int ret;
1054
1055         /*
1056          * Walk current graph and call the pipeline open/close routine for each
1057          * opened video node that belongs to the graph of entities connected
1058          * through active links. This is needed as we cannot power on/off the
1059          * subdevs in random order.
1060          */
1061         media_entity_graph_walk_start(graph, entity);
1062
1063         while ((entity = media_entity_graph_walk_next(graph))) {
1064                 if (!is_media_entity_v4l2_io(entity))
1065                         continue;
1066
1067                 ret  = __fimc_md_modify_pipeline(entity, enable);
1068
1069                 if (ret < 0)
1070                         goto err;
1071         }
1072
1073         return 0;
1074
1075 err:
1076         media_entity_graph_walk_start(graph, entity_err);
1077
1078         while ((entity_err = media_entity_graph_walk_next(graph))) {
1079                 if (!is_media_entity_v4l2_io(entity_err))
1080                         continue;
1081
1082                 __fimc_md_modify_pipeline(entity_err, !enable);
1083
1084                 if (entity_err == entity)
1085                         break;
1086         }
1087
1088         return ret;
1089 }
1090
1091 static int fimc_md_link_notify(struct media_link *link, unsigned int flags,
1092                                 unsigned int notification)
1093 {
1094         struct media_entity_graph *graph =
1095                 &container_of(link->graph_obj.mdev, struct fimc_md,
1096                               media_dev)->link_setup_graph;
1097         struct media_entity *sink = link->sink->entity;
1098         int ret = 0;
1099
1100         /* Before link disconnection */
1101         if (notification == MEDIA_DEV_NOTIFY_PRE_LINK_CH) {
1102                 ret = media_entity_graph_walk_init(graph,
1103                                                    link->graph_obj.mdev);
1104                 if (ret)
1105                         return ret;
1106                 if (!(flags & MEDIA_LNK_FL_ENABLED))
1107                         ret = __fimc_md_modify_pipelines(sink, false, graph);
1108 #if 0
1109                 else
1110                         /* TODO: Link state change validation */
1111 #endif
1112         /* After link activation */
1113         } else if (notification == MEDIA_DEV_NOTIFY_POST_LINK_CH) {
1114                 if (link->flags & MEDIA_LNK_FL_ENABLED)
1115                         ret = __fimc_md_modify_pipelines(sink, true, graph);
1116                 media_entity_graph_walk_cleanup(graph);
1117         }
1118
1119         return ret ? -EPIPE : 0;
1120 }
1121
1122 static ssize_t fimc_md_sysfs_show(struct device *dev,
1123                                   struct device_attribute *attr, char *buf)
1124 {
1125         struct platform_device *pdev = to_platform_device(dev);
1126         struct fimc_md *fmd = platform_get_drvdata(pdev);
1127
1128         if (fmd->user_subdev_api)
1129                 return strlcpy(buf, "Sub-device API (sub-dev)\n", PAGE_SIZE);
1130
1131         return strlcpy(buf, "V4L2 video node only API (vid-dev)\n", PAGE_SIZE);
1132 }
1133
1134 static ssize_t fimc_md_sysfs_store(struct device *dev,
1135                                    struct device_attribute *attr,
1136                                    const char *buf, size_t count)
1137 {
1138         struct platform_device *pdev = to_platform_device(dev);
1139         struct fimc_md *fmd = platform_get_drvdata(pdev);
1140         bool subdev_api;
1141         int i;
1142
1143         if (!strcmp(buf, "vid-dev\n"))
1144                 subdev_api = false;
1145         else if (!strcmp(buf, "sub-dev\n"))
1146                 subdev_api = true;
1147         else
1148                 return count;
1149
1150         fmd->user_subdev_api = subdev_api;
1151         for (i = 0; i < FIMC_MAX_DEVS; i++)
1152                 if (fmd->fimc[i])
1153                         fmd->fimc[i]->vid_cap.user_subdev_api = subdev_api;
1154         return count;
1155 }
1156 /*
1157  * This device attribute is to select video pipeline configuration method.
1158  * There are following valid values:
1159  *  vid-dev - for V4L2 video node API only, subdevice will be configured
1160  *  by the host driver.
1161  *  sub-dev - for media controller API, subdevs must be configured in user
1162  *  space before starting streaming.
1163  */
1164 static DEVICE_ATTR(subdev_conf_mode, S_IWUSR | S_IRUGO,
1165                    fimc_md_sysfs_show, fimc_md_sysfs_store);
1166
1167 static int fimc_md_get_pinctrl(struct fimc_md *fmd)
1168 {
1169         struct device *dev = &fmd->pdev->dev;
1170         struct fimc_pinctrl *pctl = &fmd->pinctl;
1171
1172         pctl->pinctrl = devm_pinctrl_get(dev);
1173         if (IS_ERR(pctl->pinctrl))
1174                 return PTR_ERR(pctl->pinctrl);
1175
1176         pctl->state_default = pinctrl_lookup_state(pctl->pinctrl,
1177                                         PINCTRL_STATE_DEFAULT);
1178         if (IS_ERR(pctl->state_default))
1179                 return PTR_ERR(pctl->state_default);
1180
1181         pctl->state_idle = pinctrl_lookup_state(pctl->pinctrl,
1182                                         PINCTRL_STATE_IDLE);
1183         return 0;
1184 }
1185
1186 static int cam_clk_prepare(struct clk_hw *hw)
1187 {
1188         struct cam_clk *camclk = to_cam_clk(hw);
1189         int ret;
1190
1191         if (camclk->fmd->pmf == NULL)
1192                 return -ENODEV;
1193
1194         ret = pm_runtime_get_sync(camclk->fmd->pmf);
1195         return ret < 0 ? ret : 0;
1196 }
1197
1198 static void cam_clk_unprepare(struct clk_hw *hw)
1199 {
1200         struct cam_clk *camclk = to_cam_clk(hw);
1201
1202         if (camclk->fmd->pmf == NULL)
1203                 return;
1204
1205         pm_runtime_put_sync(camclk->fmd->pmf);
1206 }
1207
1208 static const struct clk_ops cam_clk_ops = {
1209         .prepare = cam_clk_prepare,
1210         .unprepare = cam_clk_unprepare,
1211 };
1212
1213 static void fimc_md_unregister_clk_provider(struct fimc_md *fmd)
1214 {
1215         struct cam_clk_provider *cp = &fmd->clk_provider;
1216         unsigned int i;
1217
1218         if (cp->of_node)
1219                 of_clk_del_provider(cp->of_node);
1220
1221         for (i = 0; i < cp->num_clocks; i++)
1222                 clk_unregister(cp->clks[i]);
1223 }
1224
1225 static int fimc_md_register_clk_provider(struct fimc_md *fmd)
1226 {
1227         struct cam_clk_provider *cp = &fmd->clk_provider;
1228         struct device *dev = &fmd->pdev->dev;
1229         int i, ret;
1230
1231         for (i = 0; i < FIMC_MAX_CAMCLKS; i++) {
1232                 struct cam_clk *camclk = &cp->camclk[i];
1233                 struct clk_init_data init;
1234                 const char *p_name;
1235
1236                 ret = of_property_read_string_index(dev->of_node,
1237                                         "clock-output-names", i, &init.name);
1238                 if (ret < 0)
1239                         break;
1240
1241                 p_name = __clk_get_name(fmd->camclk[i].clock);
1242
1243                 /* It's safe since clk_register() will duplicate the string. */
1244                 init.parent_names = &p_name;
1245                 init.num_parents = 1;
1246                 init.ops = &cam_clk_ops;
1247                 init.flags = CLK_SET_RATE_PARENT;
1248                 camclk->hw.init = &init;
1249                 camclk->fmd = fmd;
1250
1251                 cp->clks[i] = clk_register(NULL, &camclk->hw);
1252                 if (IS_ERR(cp->clks[i])) {
1253                         dev_err(dev, "failed to register clock: %s (%ld)\n",
1254                                         init.name, PTR_ERR(cp->clks[i]));
1255                         ret = PTR_ERR(cp->clks[i]);
1256                         goto err;
1257                 }
1258                 cp->num_clocks++;
1259         }
1260
1261         if (cp->num_clocks == 0) {
1262                 dev_warn(dev, "clk provider not registered\n");
1263                 return 0;
1264         }
1265
1266         cp->clk_data.clks = cp->clks;
1267         cp->clk_data.clk_num = cp->num_clocks;
1268         cp->of_node = dev->of_node;
1269         ret = of_clk_add_provider(dev->of_node, of_clk_src_onecell_get,
1270                                   &cp->clk_data);
1271         if (ret == 0)
1272                 return 0;
1273 err:
1274         fimc_md_unregister_clk_provider(fmd);
1275         return ret;
1276 }
1277
1278 static int subdev_notifier_bound(struct v4l2_async_notifier *notifier,
1279                                  struct v4l2_subdev *subdev,
1280                                  struct v4l2_async_subdev *asd)
1281 {
1282         struct fimc_md *fmd = notifier_to_fimc_md(notifier);
1283         struct fimc_sensor_info *si = NULL;
1284         int i;
1285
1286         /* Find platform data for this sensor subdev */
1287         for (i = 0; i < ARRAY_SIZE(fmd->sensor); i++)
1288                 if (fmd->sensor[i].asd.match.of.node == subdev->dev->of_node)
1289                         si = &fmd->sensor[i];
1290
1291         if (si == NULL)
1292                 return -EINVAL;
1293
1294         v4l2_set_subdev_hostdata(subdev, &si->pdata);
1295
1296         if (si->pdata.fimc_bus_type == FIMC_BUS_TYPE_ISP_WRITEBACK)
1297                 subdev->grp_id = GRP_ID_FIMC_IS_SENSOR;
1298         else
1299                 subdev->grp_id = GRP_ID_SENSOR;
1300
1301         si->subdev = subdev;
1302
1303         v4l2_info(&fmd->v4l2_dev, "Registered sensor subdevice: %s (%d)\n",
1304                   subdev->name, fmd->num_sensors);
1305
1306         fmd->num_sensors++;
1307
1308         return 0;
1309 }
1310
1311 static int subdev_notifier_complete(struct v4l2_async_notifier *notifier)
1312 {
1313         struct fimc_md *fmd = notifier_to_fimc_md(notifier);
1314         int ret;
1315
1316         mutex_lock(&fmd->media_dev.graph_mutex);
1317
1318         ret = fimc_md_create_links(fmd);
1319         if (ret < 0)
1320                 goto unlock;
1321
1322         ret = v4l2_device_register_subdev_nodes(&fmd->v4l2_dev);
1323 unlock:
1324         mutex_unlock(&fmd->media_dev.graph_mutex);
1325         if (ret < 0)
1326                 return ret;
1327
1328         return media_device_register(&fmd->media_dev);
1329 }
1330
1331 static int fimc_md_probe(struct platform_device *pdev)
1332 {
1333         struct device *dev = &pdev->dev;
1334         struct v4l2_device *v4l2_dev;
1335         struct fimc_md *fmd;
1336         int ret;
1337
1338         fmd = devm_kzalloc(dev, sizeof(*fmd), GFP_KERNEL);
1339         if (!fmd)
1340                 return -ENOMEM;
1341
1342         spin_lock_init(&fmd->slock);
1343         INIT_LIST_HEAD(&fmd->pipelines);
1344         fmd->pdev = pdev;
1345
1346         strlcpy(fmd->media_dev.model, "SAMSUNG S5P FIMC",
1347                 sizeof(fmd->media_dev.model));
1348         fmd->media_dev.link_notify = fimc_md_link_notify;
1349         fmd->media_dev.dev = dev;
1350
1351         v4l2_dev = &fmd->v4l2_dev;
1352         v4l2_dev->mdev = &fmd->media_dev;
1353         v4l2_dev->notify = fimc_sensor_notify;
1354         strlcpy(v4l2_dev->name, "s5p-fimc-md", sizeof(v4l2_dev->name));
1355
1356         fmd->use_isp = fimc_md_is_isp_available(dev->of_node);
1357         fmd->user_subdev_api = true;
1358
1359         media_device_init(&fmd->media_dev);
1360
1361         ret = v4l2_device_register(dev, &fmd->v4l2_dev);
1362         if (ret < 0) {
1363                 v4l2_err(v4l2_dev, "Failed to register v4l2_device: %d\n", ret);
1364                 return ret;
1365         }
1366
1367         ret = fimc_md_get_clocks(fmd);
1368         if (ret)
1369                 goto err_md;
1370
1371         ret = fimc_md_get_pinctrl(fmd);
1372         if (ret < 0) {
1373                 if (ret != EPROBE_DEFER)
1374                         dev_err(dev, "Failed to get pinctrl: %d\n", ret);
1375                 goto err_clk;
1376         }
1377
1378         platform_set_drvdata(pdev, fmd);
1379
1380         /* Protect the media graph while we're registering entities */
1381         mutex_lock(&fmd->media_dev.graph_mutex);
1382
1383         ret = fimc_md_register_platform_entities(fmd, dev->of_node);
1384         if (ret) {
1385                 mutex_unlock(&fmd->media_dev.graph_mutex);
1386                 goto err_clk;
1387         }
1388
1389         ret = fimc_md_register_sensor_entities(fmd);
1390         if (ret) {
1391                 mutex_unlock(&fmd->media_dev.graph_mutex);
1392                 goto err_m_ent;
1393         }
1394
1395         mutex_unlock(&fmd->media_dev.graph_mutex);
1396
1397         ret = device_create_file(&pdev->dev, &dev_attr_subdev_conf_mode);
1398         if (ret)
1399                 goto err_m_ent;
1400         /*
1401          * FIMC platform devices need to be registered before the sclk_cam
1402          * clocks provider, as one of these devices needs to be activated
1403          * to enable the clock.
1404          */
1405         ret = fimc_md_register_clk_provider(fmd);
1406         if (ret < 0) {
1407                 v4l2_err(v4l2_dev, "clock provider registration failed\n");
1408                 goto err_attr;
1409         }
1410
1411         if (fmd->num_sensors > 0) {
1412                 fmd->subdev_notifier.subdevs = fmd->async_subdevs;
1413                 fmd->subdev_notifier.num_subdevs = fmd->num_sensors;
1414                 fmd->subdev_notifier.bound = subdev_notifier_bound;
1415                 fmd->subdev_notifier.complete = subdev_notifier_complete;
1416                 fmd->num_sensors = 0;
1417
1418                 ret = v4l2_async_notifier_register(&fmd->v4l2_dev,
1419                                                 &fmd->subdev_notifier);
1420                 if (ret)
1421                         goto err_clk_p;
1422         }
1423
1424         return 0;
1425
1426 err_clk_p:
1427         fimc_md_unregister_clk_provider(fmd);
1428 err_attr:
1429         device_remove_file(&pdev->dev, &dev_attr_subdev_conf_mode);
1430 err_clk:
1431         fimc_md_put_clocks(fmd);
1432 err_m_ent:
1433         fimc_md_unregister_entities(fmd);
1434 err_md:
1435         media_device_cleanup(&fmd->media_dev);
1436         v4l2_device_unregister(&fmd->v4l2_dev);
1437         return ret;
1438 }
1439
1440 static int fimc_md_remove(struct platform_device *pdev)
1441 {
1442         struct fimc_md *fmd = platform_get_drvdata(pdev);
1443
1444         if (!fmd)
1445                 return 0;
1446
1447         fimc_md_unregister_clk_provider(fmd);
1448         v4l2_async_notifier_unregister(&fmd->subdev_notifier);
1449
1450         v4l2_device_unregister(&fmd->v4l2_dev);
1451         device_remove_file(&pdev->dev, &dev_attr_subdev_conf_mode);
1452         fimc_md_unregister_entities(fmd);
1453         fimc_md_pipelines_free(fmd);
1454         media_device_unregister(&fmd->media_dev);
1455         media_device_cleanup(&fmd->media_dev);
1456         fimc_md_put_clocks(fmd);
1457
1458         return 0;
1459 }
1460
1461 static const struct platform_device_id fimc_driver_ids[] __always_unused = {
1462         { .name = "s5p-fimc-md" },
1463         { },
1464 };
1465 MODULE_DEVICE_TABLE(platform, fimc_driver_ids);
1466
1467 static const struct of_device_id fimc_md_of_match[] = {
1468         { .compatible = "samsung,fimc" },
1469         { },
1470 };
1471 MODULE_DEVICE_TABLE(of, fimc_md_of_match);
1472
1473 static struct platform_driver fimc_md_driver = {
1474         .probe          = fimc_md_probe,
1475         .remove         = fimc_md_remove,
1476         .driver = {
1477                 .of_match_table = of_match_ptr(fimc_md_of_match),
1478                 .name           = "s5p-fimc-md",
1479         }
1480 };
1481
1482 static int __init fimc_md_init(void)
1483 {
1484         int ret;
1485
1486         request_module("s5p-csis");
1487         ret = fimc_register_driver();
1488         if (ret)
1489                 return ret;
1490
1491         return platform_driver_register(&fimc_md_driver);
1492 }
1493
1494 static void __exit fimc_md_exit(void)
1495 {
1496         platform_driver_unregister(&fimc_md_driver);
1497         fimc_unregister_driver();
1498 }
1499
1500 module_init(fimc_md_init);
1501 module_exit(fimc_md_exit);
1502
1503 MODULE_AUTHOR("Sylwester Nawrocki <s.nawrocki@samsung.com>");
1504 MODULE_DESCRIPTION("S5P FIMC camera host interface/video postprocessor driver");
1505 MODULE_LICENSE("GPL");
1506 MODULE_VERSION("2.0.1");