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

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This source file includes following definitions.
__setup_sensor_notification
fimc_pipeline_prepare
__subdev_set_power
fimc_pipeline_s_power
__fimc_pipeline_enable
__fimc_pipeline_open
__fimc_pipeline_close
__fimc_pipeline_s_stream
fimc_md_pipeline_create
fimc_md_pipelines_free
fimc_md_parse_port_node
fimc_md_register_sensor_entities
__of_get_csis_id
register_fimc_lite_entity
register_fimc_entity
register_csis_entity
register_fimc_is_entity
fimc_md_register_platform_entity
fimc_md_register_platform_entities
fimc_md_unregister_entities
__fimc_md_create_fimc_sink_links
__fimc_md_create_flite_source_links
__fimc_md_create_fimc_is_links
fimc_md_create_links
fimc_md_put_clocks
fimc_md_get_clocks
__fimc_md_modify_pipeline
__fimc_md_modify_pipelines
fimc_md_link_notify
fimc_md_sysfs_show
fimc_md_sysfs_store
fimc_md_get_pinctrl
cam_clk_prepare
cam_clk_unprepare
fimc_md_unregister_clk_provider
fimc_md_register_clk_provider
subdev_notifier_bound
subdev_notifier_complete
fimc_md_probe
fimc_md_remove
fimc_md_init
fimc_md_exit
   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * S5P/EXYNOS4 SoC series camera host interface media device driver
   4  *
   5  * Copyright (C) 2011 - 2013 Samsung Electronics Co., Ltd.
   6  * Author: Sylwester Nawrocki <s.nawrocki@samsung.com>
   7  */
   8 
   9 #include <linux/bug.h>
  10 #include <linux/clk.h>
  11 #include <linux/clk-provider.h>
  12 #include <linux/device.h>
  13 #include <linux/errno.h>
  14 #include <linux/i2c.h>
  15 #include <linux/kernel.h>
  16 #include <linux/list.h>
  17 #include <linux/module.h>
  18 #include <linux/of.h>
  19 #include <linux/of_platform.h>
  20 #include <linux/of_device.h>
  21 #include <linux/of_graph.h>
  22 #include <linux/platform_device.h>
  23 #include <linux/pm_runtime.h>
  24 #include <linux/types.h>
  25 #include <linux/slab.h>
  26 #include <media/v4l2-async.h>
  27 #include <media/v4l2-ctrls.h>
  28 #include <media/v4l2-fwnode.h>
  29 #include <media/media-device.h>
  30 #include <media/drv-intf/exynos-fimc.h>
  31 
  32 #include "media-dev.h"
  33 #include "fimc-core.h"
  34 #include "fimc-is.h"
  35 #include "fimc-lite.h"
  36 #include "mipi-csis.h"
  37 
  38 /* Set up image sensor subdev -> FIMC capture node notifications. */
  39 static void __setup_sensor_notification(struct fimc_md *fmd,
  40                                         struct v4l2_subdev *sensor,
  41                                         struct v4l2_subdev *fimc_sd)
  42 {
  43         struct fimc_source_info *src_inf;
  44         struct fimc_sensor_info *md_si;
  45         unsigned long flags;
  46 
  47         src_inf = v4l2_get_subdev_hostdata(sensor);
  48         if (!src_inf || WARN_ON(fmd == NULL))
  49                 return;
  50 
  51         md_si = source_to_sensor_info(src_inf);
  52         spin_lock_irqsave(&fmd->slock, flags);
  53         md_si->host = v4l2_get_subdevdata(fimc_sd);
  54         spin_unlock_irqrestore(&fmd->slock, flags);
  55 }
  56 
  57 /**
  58  * fimc_pipeline_prepare - update pipeline information with subdevice pointers
  59  * @p: fimc pipeline
  60  * @me: media entity terminating the pipeline
  61  *
  62  * Caller holds the graph mutex.
  63  */
  64 static void fimc_pipeline_prepare(struct fimc_pipeline *p,
  65                                         struct media_entity *me)
  66 {
  67         struct fimc_md *fmd = entity_to_fimc_mdev(me);
  68         struct v4l2_subdev *sd;
  69         struct v4l2_subdev *sensor = NULL;
  70         int i;
  71 
  72         for (i = 0; i < IDX_MAX; i++)
  73                 p->subdevs[i] = NULL;
  74 
  75         while (1) {
  76                 struct media_pad *pad = NULL;
  77 
  78                 /* Find remote source pad */
  79                 for (i = 0; i < me->num_pads; i++) {
  80                         struct media_pad *spad = &me->pads[i];
  81                         if (!(spad->flags & MEDIA_PAD_FL_SINK))
  82                                 continue;
  83                         pad = media_entity_remote_pad(spad);
  84                         if (pad)
  85                                 break;
  86                 }
  87 
  88                 if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
  89                         break;
  90                 sd = media_entity_to_v4l2_subdev(pad->entity);
  91 
  92                 switch (sd->grp_id) {
  93                 case GRP_ID_SENSOR:
  94                         sensor = sd;
  95                         /* fall through */
  96                 case GRP_ID_FIMC_IS_SENSOR:
  97                         p->subdevs[IDX_SENSOR] = sd;
  98                         break;
  99                 case GRP_ID_CSIS:
 100                         p->subdevs[IDX_CSIS] = sd;
 101                         break;
 102                 case GRP_ID_FLITE:
 103                         p->subdevs[IDX_FLITE] = sd;
 104                         break;
 105                 case GRP_ID_FIMC:
 106                         p->subdevs[IDX_FIMC] = sd;
 107                         break;
 108                 case GRP_ID_FIMC_IS:
 109                         p->subdevs[IDX_IS_ISP] = sd;
 110                         break;
 111                 default:
 112                         break;
 113                 }
 114                 me = &sd->entity;
 115                 if (me->num_pads == 1)
 116                         break;
 117         }
 118 
 119         if (sensor && p->subdevs[IDX_FIMC])
 120                 __setup_sensor_notification(fmd, sensor, p->subdevs[IDX_FIMC]);
 121 }
 122 
 123 /**
 124  * __subdev_set_power - change power state of a single subdev
 125  * @sd: subdevice to change power state for
 126  * @on: 1 to enable power or 0 to disable
 127  *
 128  * Return result of s_power subdev operation or -ENXIO if sd argument
 129  * is NULL. Return 0 if the subdevice does not implement s_power.
 130  */
 131 static int __subdev_set_power(struct v4l2_subdev *sd, int on)
 132 {
 133         int *use_count;
 134         int ret;
 135 
 136         if (sd == NULL)
 137                 return -ENXIO;
 138 
 139         use_count = &sd->entity.use_count;
 140         if (on && (*use_count)++ > 0)
 141                 return 0;
 142         else if (!on && (*use_count == 0 || --(*use_count) > 0))
 143                 return 0;
 144         ret = v4l2_subdev_call(sd, core, s_power, on);
 145 
 146         return ret != -ENOIOCTLCMD ? ret : 0;
 147 }
 148 
 149 /**
 150  * fimc_pipeline_s_power - change power state of all pipeline subdevs
 151  * @p: fimc device terminating the pipeline
 152  * @on: true to power on, false to power off
 153  *
 154  * Needs to be called with the graph mutex held.
 155  */
 156 static int fimc_pipeline_s_power(struct fimc_pipeline *p, bool on)
 157 {
 158         static const u8 seq[2][IDX_MAX - 1] = {
 159                 { IDX_IS_ISP, IDX_SENSOR, IDX_CSIS, IDX_FLITE },
 160                 { IDX_CSIS, IDX_FLITE, IDX_SENSOR, IDX_IS_ISP },
 161         };
 162         int i, ret = 0;
 163 
 164         if (p->subdevs[IDX_SENSOR] == NULL)
 165                 return -ENXIO;
 166 
 167         for (i = 0; i < IDX_MAX - 1; i++) {
 168                 unsigned int idx = seq[on][i];
 169 
 170                 ret = __subdev_set_power(p->subdevs[idx], on);
 171 
 172 
 173                 if (ret < 0 && ret != -ENXIO)
 174                         goto error;
 175         }
 176         return 0;
 177 error:
 178         for (; i >= 0; i--) {
 179                 unsigned int idx = seq[on][i];
 180                 __subdev_set_power(p->subdevs[idx], !on);
 181         }
 182         return ret;
 183 }
 184 
 185 /**
 186  * __fimc_pipeline_enable - enable power of all pipeline subdevs
 187  *                          and the sensor clock
 188  * @ep: video pipeline structure
 189  * @fmd: fimc media device
 190  *
 191  * Called with the graph mutex held.
 192  */
 193 static int __fimc_pipeline_enable(struct exynos_media_pipeline *ep,
 194                                   struct fimc_md *fmd)
 195 {
 196         struct fimc_pipeline *p = to_fimc_pipeline(ep);
 197         int ret;
 198 
 199         /* Enable PXLASYNC clock if this pipeline includes FIMC-IS */
 200         if (!IS_ERR(fmd->wbclk[CLK_IDX_WB_B]) && p->subdevs[IDX_IS_ISP]) {
 201                 ret = clk_prepare_enable(fmd->wbclk[CLK_IDX_WB_B]);
 202                 if (ret < 0)
 203                         return ret;
 204         }
 205 
 206         ret = fimc_pipeline_s_power(p, 1);
 207         if (!ret)
 208                 return 0;
 209 
 210         if (!IS_ERR(fmd->wbclk[CLK_IDX_WB_B]) && p->subdevs[IDX_IS_ISP])
 211                 clk_disable_unprepare(fmd->wbclk[CLK_IDX_WB_B]);
 212 
 213         return ret;
 214 }
 215 
 216 /**
 217  * __fimc_pipeline_open - update the pipeline information, enable power
 218  *                        of all pipeline subdevs and the sensor clock
 219  * @ep: fimc device terminating the pipeline
 220  * @me: media entity to start graph walk with
 221  * @prepare: true to walk the current pipeline and acquire all subdevs
 222  *
 223  * Called with the graph mutex held.
 224  */
 225 static int __fimc_pipeline_open(struct exynos_media_pipeline *ep,
 226                                 struct media_entity *me, bool prepare)
 227 {
 228         struct fimc_md *fmd = entity_to_fimc_mdev(me);
 229         struct fimc_pipeline *p = to_fimc_pipeline(ep);
 230         struct v4l2_subdev *sd;
 231 
 232         if (WARN_ON(p == NULL || me == NULL))
 233                 return -EINVAL;
 234 
 235         if (prepare)
 236                 fimc_pipeline_prepare(p, me);
 237 
 238         sd = p->subdevs[IDX_SENSOR];
 239         if (sd == NULL) {
 240                 pr_warn("%s(): No sensor subdev\n", __func__);
 241                 /*
 242                  * Pipeline open cannot fail so as to make it possible
 243                  * for the user space to configure the pipeline.
 244                  */
 245                 return 0;
 246         }
 247 
 248         return __fimc_pipeline_enable(ep, fmd);
 249 }
 250 
 251 /**
 252  * __fimc_pipeline_close - disable the sensor clock and pipeline power
 253  * @ep: fimc device terminating the pipeline
 254  *
 255  * Disable power of all subdevs and turn the external sensor clock off.
 256  */
 257 static int __fimc_pipeline_close(struct exynos_media_pipeline *ep)
 258 {
 259         struct fimc_pipeline *p = to_fimc_pipeline(ep);
 260         struct v4l2_subdev *sd = p ? p->subdevs[IDX_SENSOR] : NULL;
 261         struct fimc_md *fmd;
 262         int ret;
 263 
 264         if (sd == NULL) {
 265                 pr_warn("%s(): No sensor subdev\n", __func__);
 266                 return 0;
 267         }
 268 
 269         ret = fimc_pipeline_s_power(p, 0);
 270 
 271         fmd = entity_to_fimc_mdev(&sd->entity);
 272 
 273         /* Disable PXLASYNC clock if this pipeline includes FIMC-IS */
 274         if (!IS_ERR(fmd->wbclk[CLK_IDX_WB_B]) && p->subdevs[IDX_IS_ISP])
 275                 clk_disable_unprepare(fmd->wbclk[CLK_IDX_WB_B]);
 276 
 277         return ret == -ENXIO ? 0 : ret;
 278 }
 279 
 280 /**
 281  * __fimc_pipeline_s_stream - call s_stream() on pipeline subdevs
 282  * @ep: video pipeline structure
 283  * @on: passed as the s_stream() callback argument
 284  */
 285 static int __fimc_pipeline_s_stream(struct exynos_media_pipeline *ep, bool on)
 286 {
 287         static const u8 seq[2][IDX_MAX] = {
 288                 { IDX_FIMC, IDX_SENSOR, IDX_IS_ISP, IDX_CSIS, IDX_FLITE },
 289                 { IDX_CSIS, IDX_FLITE, IDX_FIMC, IDX_SENSOR, IDX_IS_ISP },
 290         };
 291         struct fimc_pipeline *p = to_fimc_pipeline(ep);
 292         struct fimc_md *fmd = entity_to_fimc_mdev(&p->subdevs[IDX_CSIS]->entity);
 293         enum fimc_subdev_index sd_id;
 294         int i, ret = 0;
 295 
 296         if (p->subdevs[IDX_SENSOR] == NULL) {
 297                 if (!fmd->user_subdev_api) {
 298                         /*
 299                          * Sensor must be already discovered if we
 300                          * aren't in the user_subdev_api mode
 301                          */
 302                         return -ENODEV;
 303                 }
 304 
 305                 /* Get pipeline sink entity */
 306                 if (p->subdevs[IDX_FIMC])
 307                         sd_id = IDX_FIMC;
 308                 else if (p->subdevs[IDX_IS_ISP])
 309                         sd_id = IDX_IS_ISP;
 310                 else if (p->subdevs[IDX_FLITE])
 311                         sd_id = IDX_FLITE;
 312                 else
 313                         return -ENODEV;
 314 
 315                 /*
 316                  * Sensor could have been linked between open and STREAMON -
 317                  * check if this is the case.
 318                  */
 319                 fimc_pipeline_prepare(p, &p->subdevs[sd_id]->entity);
 320 
 321                 if (p->subdevs[IDX_SENSOR] == NULL)
 322                         return -ENODEV;
 323 
 324                 ret = __fimc_pipeline_enable(ep, fmd);
 325                 if (ret < 0)
 326                         return ret;
 327 
 328         }
 329 
 330         for (i = 0; i < IDX_MAX; i++) {
 331                 unsigned int idx = seq[on][i];
 332 
 333                 ret = v4l2_subdev_call(p->subdevs[idx], video, s_stream, on);
 334 
 335                 if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV)
 336                         goto error;
 337         }
 338 
 339         return 0;
 340 error:
 341         fimc_pipeline_s_power(p, !on);
 342         for (; i >= 0; i--) {
 343                 unsigned int idx = seq[on][i];
 344                 v4l2_subdev_call(p->subdevs[idx], video, s_stream, !on);
 345         }
 346         return ret;
 347 }
 348 
 349 /* Media pipeline operations for the FIMC/FIMC-LITE video device driver */
 350 static const struct exynos_media_pipeline_ops fimc_pipeline_ops = {
 351         .open           = __fimc_pipeline_open,
 352         .close          = __fimc_pipeline_close,
 353         .set_stream     = __fimc_pipeline_s_stream,
 354 };
 355 
 356 static struct exynos_media_pipeline *fimc_md_pipeline_create(
 357                                                 struct fimc_md *fmd)
 358 {
 359         struct fimc_pipeline *p;
 360 
 361         p = kzalloc(sizeof(*p), GFP_KERNEL);
 362         if (!p)
 363                 return NULL;
 364 
 365         list_add_tail(&p->list, &fmd->pipelines);
 366 
 367         p->ep.ops = &fimc_pipeline_ops;
 368         return &p->ep;
 369 }
 370 
 371 static void fimc_md_pipelines_free(struct fimc_md *fmd)
 372 {
 373         while (!list_empty(&fmd->pipelines)) {
 374                 struct fimc_pipeline *p;
 375 
 376                 p = list_entry(fmd->pipelines.next, typeof(*p), list);
 377                 list_del(&p->list);
 378                 kfree(p);
 379         }
 380 }
 381 
 382 /* Parse port node and register as a sub-device any sensor specified there. */
 383 static int fimc_md_parse_port_node(struct fimc_md *fmd,
 384                                    struct device_node *port,
 385                                    unsigned int index)
 386 {
 387         struct fimc_source_info *pd = &fmd->sensor[index].pdata;
 388         struct device_node *rem, *ep, *np;
 389         struct v4l2_fwnode_endpoint endpoint = { .bus_type = 0 };
 390         int ret;
 391 
 392         /* Assume here a port node can have only one endpoint node. */
 393         ep = of_get_next_child(port, NULL);
 394         if (!ep)
 395                 return 0;
 396 
 397         ret = v4l2_fwnode_endpoint_parse(of_fwnode_handle(ep), &endpoint);
 398         if (ret) {
 399                 of_node_put(ep);
 400                 return ret;
 401         }
 402 
 403         if (WARN_ON(endpoint.base.port == 0) || index >= FIMC_MAX_SENSORS) {
 404                 of_node_put(ep);
 405                 return -EINVAL;
 406         }
 407 
 408         pd->mux_id = (endpoint.base.port - 1) & 0x1;
 409 
 410         rem = of_graph_get_remote_port_parent(ep);
 411         of_node_put(ep);
 412         if (rem == NULL) {
 413                 v4l2_info(&fmd->v4l2_dev, "Remote device at %pOF not found\n",
 414                                                         ep);
 415                 return 0;
 416         }
 417 
 418         if (fimc_input_is_parallel(endpoint.base.port)) {
 419                 if (endpoint.bus_type == V4L2_MBUS_PARALLEL)
 420                         pd->sensor_bus_type = FIMC_BUS_TYPE_ITU_601;
 421                 else
 422                         pd->sensor_bus_type = FIMC_BUS_TYPE_ITU_656;
 423                 pd->flags = endpoint.bus.parallel.flags;
 424         } else if (fimc_input_is_mipi_csi(endpoint.base.port)) {
 425                 /*
 426                  * MIPI CSI-2: only input mux selection and
 427                  * the sensor's clock frequency is needed.
 428                  */
 429                 pd->sensor_bus_type = FIMC_BUS_TYPE_MIPI_CSI2;
 430         } else {
 431                 v4l2_err(&fmd->v4l2_dev, "Wrong port id (%u) at node %pOF\n",
 432                          endpoint.base.port, rem);
 433         }
 434         /*
 435          * For FIMC-IS handled sensors, that are placed under i2c-isp device
 436          * node, FIMC is connected to the FIMC-IS through its ISP Writeback
 437          * input. Sensors are attached to the FIMC-LITE hostdata interface
 438          * directly or through MIPI-CSIS, depending on the external media bus
 439          * used. This needs to be handled in a more reliable way, not by just
 440          * checking parent's node name.
 441          */
 442         np = of_get_parent(rem);
 443 
 444         if (of_node_name_eq(np, "i2c-isp"))
 445                 pd->fimc_bus_type = FIMC_BUS_TYPE_ISP_WRITEBACK;
 446         else
 447                 pd->fimc_bus_type = pd->sensor_bus_type;
 448         of_node_put(np);
 449 
 450         if (WARN_ON(index >= ARRAY_SIZE(fmd->sensor))) {
 451                 of_node_put(rem);
 452                 return -EINVAL;
 453         }
 454 
 455         fmd->sensor[index].asd.match_type = V4L2_ASYNC_MATCH_FWNODE;
 456         fmd->sensor[index].asd.match.fwnode = of_fwnode_handle(rem);
 457 
 458         ret = v4l2_async_notifier_add_subdev(&fmd->subdev_notifier,
 459                                              &fmd->sensor[index].asd);
 460         if (ret) {
 461                 of_node_put(rem);
 462                 return ret;
 463         }
 464 
 465         fmd->num_sensors++;
 466 
 467         return 0;
 468 }
 469 
 470 /* Register all SoC external sub-devices */
 471 static int fimc_md_register_sensor_entities(struct fimc_md *fmd)
 472 {
 473         struct device_node *parent = fmd->pdev->dev.of_node;
 474         struct device_node *ports = NULL;
 475         struct device_node *node;
 476         int index = 0;
 477         int ret;
 478 
 479         /*
 480          * Runtime resume one of the FIMC entities to make sure
 481          * the sclk_cam clocks are not globally disabled.
 482          */
 483         if (!fmd->pmf)
 484                 return -ENXIO;
 485 
 486         ret = pm_runtime_get_sync(fmd->pmf);
 487         if (ret < 0)
 488                 return ret;
 489 
 490         fmd->num_sensors = 0;
 491 
 492         /* Attach sensors linked to MIPI CSI-2 receivers */
 493         for_each_available_child_of_node(parent, node) {
 494                 struct device_node *port;
 495 
 496                 if (!of_node_name_eq(node, "csis"))
 497                         continue;
 498                 /* The csis node can have only port subnode. */
 499                 port = of_get_next_child(node, NULL);
 500                 if (!port)
 501                         continue;
 502 
 503                 ret = fimc_md_parse_port_node(fmd, port, index);
 504                 of_node_put(port);
 505                 if (ret < 0) {
 506                         of_node_put(node);
 507                         goto cleanup;
 508                 }
 509                 index++;
 510         }
 511 
 512         /* Attach sensors listed in the parallel-ports node */
 513         ports = of_get_child_by_name(parent, "parallel-ports");
 514         if (!ports)
 515                 goto rpm_put;
 516 
 517         for_each_child_of_node(ports, node) {
 518                 ret = fimc_md_parse_port_node(fmd, node, index);
 519                 if (ret < 0) {
 520                         of_node_put(node);
 521                         goto cleanup;
 522                 }
 523                 index++;
 524         }
 525         of_node_put(ports);
 526 
 527 rpm_put:
 528         pm_runtime_put(fmd->pmf);
 529         return 0;
 530 
 531 cleanup:
 532         of_node_put(ports);
 533         v4l2_async_notifier_cleanup(&fmd->subdev_notifier);
 534         pm_runtime_put(fmd->pmf);
 535         return ret;
 536 }
 537 
 538 static int __of_get_csis_id(struct device_node *np)
 539 {
 540         u32 reg = 0;
 541 
 542         np = of_get_child_by_name(np, "port");
 543         if (!np)
 544                 return -EINVAL;
 545         of_property_read_u32(np, "reg", &reg);
 546         of_node_put(np);
 547         return reg - FIMC_INPUT_MIPI_CSI2_0;
 548 }
 549 
 550 /*
 551  * MIPI-CSIS, FIMC and FIMC-LITE platform devices registration.
 552  */
 553 static int register_fimc_lite_entity(struct fimc_md *fmd,
 554                                      struct fimc_lite *fimc_lite)
 555 {
 556         struct v4l2_subdev *sd;
 557         struct exynos_media_pipeline *ep;
 558         int ret;
 559 
 560         if (WARN_ON(fimc_lite->index >= FIMC_LITE_MAX_DEVS ||
 561                     fmd->fimc_lite[fimc_lite->index]))
 562                 return -EBUSY;
 563 
 564         sd = &fimc_lite->subdev;
 565         sd->grp_id = GRP_ID_FLITE;
 566 
 567         ep = fimc_md_pipeline_create(fmd);
 568         if (!ep)
 569                 return -ENOMEM;
 570 
 571         v4l2_set_subdev_hostdata(sd, ep);
 572 
 573         ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd);
 574         if (!ret)
 575                 fmd->fimc_lite[fimc_lite->index] = fimc_lite;
 576         else
 577                 v4l2_err(&fmd->v4l2_dev, "Failed to register FIMC.LITE%d\n",
 578                          fimc_lite->index);
 579         return ret;
 580 }
 581 
 582 static int register_fimc_entity(struct fimc_md *fmd, struct fimc_dev *fimc)
 583 {
 584         struct v4l2_subdev *sd;
 585         struct exynos_media_pipeline *ep;
 586         int ret;
 587 
 588         if (WARN_ON(fimc->id >= FIMC_MAX_DEVS || fmd->fimc[fimc->id]))
 589                 return -EBUSY;
 590 
 591         sd = &fimc->vid_cap.subdev;
 592         sd->grp_id = GRP_ID_FIMC;
 593 
 594         ep = fimc_md_pipeline_create(fmd);
 595         if (!ep)
 596                 return -ENOMEM;
 597 
 598         v4l2_set_subdev_hostdata(sd, ep);
 599 
 600         ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd);
 601         if (!ret) {
 602                 if (!fmd->pmf && fimc->pdev)
 603                         fmd->pmf = &fimc->pdev->dev;
 604                 fmd->fimc[fimc->id] = fimc;
 605                 fimc->vid_cap.user_subdev_api = fmd->user_subdev_api;
 606         } else {
 607                 v4l2_err(&fmd->v4l2_dev, "Failed to register FIMC.%d (%d)\n",
 608                          fimc->id, ret);
 609         }
 610         return ret;
 611 }
 612 
 613 static int register_csis_entity(struct fimc_md *fmd,
 614                                 struct platform_device *pdev,
 615                                 struct v4l2_subdev *sd)
 616 {
 617         struct device_node *node = pdev->dev.of_node;
 618         int id, ret;
 619 
 620         id = node ? __of_get_csis_id(node) : max(0, pdev->id);
 621 
 622         if (WARN_ON(id < 0 || id >= CSIS_MAX_ENTITIES))
 623                 return -ENOENT;
 624 
 625         if (WARN_ON(fmd->csis[id].sd))
 626                 return -EBUSY;
 627 
 628         sd->grp_id = GRP_ID_CSIS;
 629         ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd);
 630         if (!ret)
 631                 fmd->csis[id].sd = sd;
 632         else
 633                 v4l2_err(&fmd->v4l2_dev,
 634                          "Failed to register MIPI-CSIS.%d (%d)\n", id, ret);
 635         return ret;
 636 }
 637 
 638 static int register_fimc_is_entity(struct fimc_md *fmd, struct fimc_is *is)
 639 {
 640         struct v4l2_subdev *sd = &is->isp.subdev;
 641         struct exynos_media_pipeline *ep;
 642         int ret;
 643 
 644         /* Allocate pipeline object for the ISP capture video node. */
 645         ep = fimc_md_pipeline_create(fmd);
 646         if (!ep)
 647                 return -ENOMEM;
 648 
 649         v4l2_set_subdev_hostdata(sd, ep);
 650 
 651         ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd);
 652         if (ret) {
 653                 v4l2_err(&fmd->v4l2_dev,
 654                          "Failed to register FIMC-ISP (%d)\n", ret);
 655                 return ret;
 656         }
 657 
 658         fmd->fimc_is = is;
 659         return 0;
 660 }
 661 
 662 static int fimc_md_register_platform_entity(struct fimc_md *fmd,
 663                                             struct platform_device *pdev,
 664                                             int plat_entity)
 665 {
 666         struct device *dev = &pdev->dev;
 667         int ret = -EPROBE_DEFER;
 668         void *drvdata;
 669 
 670         /* Lock to ensure dev->driver won't change. */
 671         device_lock(dev);
 672 
 673         if (!dev->driver || !try_module_get(dev->driver->owner))
 674                 goto dev_unlock;
 675 
 676         drvdata = dev_get_drvdata(dev);
 677         /* Some subdev didn't probe successfully id drvdata is NULL */
 678         if (drvdata) {
 679                 switch (plat_entity) {
 680                 case IDX_FIMC:
 681                         ret = register_fimc_entity(fmd, drvdata);
 682                         break;
 683                 case IDX_FLITE:
 684                         ret = register_fimc_lite_entity(fmd, drvdata);
 685                         break;
 686                 case IDX_CSIS:
 687                         ret = register_csis_entity(fmd, pdev, drvdata);
 688                         break;
 689                 case IDX_IS_ISP:
 690                         ret = register_fimc_is_entity(fmd, drvdata);
 691                         break;
 692                 default:
 693                         ret = -ENODEV;
 694                 }
 695         }
 696 
 697         module_put(dev->driver->owner);
 698 dev_unlock:
 699         device_unlock(dev);
 700         if (ret == -EPROBE_DEFER)
 701                 dev_info(&fmd->pdev->dev, "deferring %s device registration\n",
 702                         dev_name(dev));
 703         else if (ret < 0)
 704                 dev_err(&fmd->pdev->dev, "%s device registration failed (%d)\n",
 705                         dev_name(dev), ret);
 706         return ret;
 707 }
 708 
 709 /* Register FIMC, FIMC-LITE and CSIS media entities */
 710 static int fimc_md_register_platform_entities(struct fimc_md *fmd,
 711                                               struct device_node *parent)
 712 {
 713         struct device_node *node;
 714         int ret = 0;
 715 
 716         for_each_available_child_of_node(parent, node) {
 717                 struct platform_device *pdev;
 718                 int plat_entity = -1;
 719 
 720                 pdev = of_find_device_by_node(node);
 721                 if (!pdev)
 722                         continue;
 723 
 724                 /* If driver of any entity isn't ready try all again later. */
 725                 if (of_node_name_eq(node, CSIS_OF_NODE_NAME))
 726                         plat_entity = IDX_CSIS;
 727                 else if (of_node_name_eq(node, FIMC_IS_OF_NODE_NAME))
 728                         plat_entity = IDX_IS_ISP;
 729                 else if (of_node_name_eq(node, FIMC_LITE_OF_NODE_NAME))
 730                         plat_entity = IDX_FLITE;
 731                 else if (of_node_name_eq(node, FIMC_OF_NODE_NAME) &&
 732                          !of_property_read_bool(node, "samsung,lcd-wb"))
 733                         plat_entity = IDX_FIMC;
 734 
 735                 if (plat_entity >= 0)
 736                         ret = fimc_md_register_platform_entity(fmd, pdev,
 737                                                         plat_entity);
 738                 put_device(&pdev->dev);
 739                 if (ret < 0) {
 740                         of_node_put(node);
 741                         break;
 742                 }
 743         }
 744 
 745         return ret;
 746 }
 747 
 748 static void fimc_md_unregister_entities(struct fimc_md *fmd)
 749 {
 750         int i;
 751 
 752         for (i = 0; i < FIMC_MAX_DEVS; i++) {
 753                 struct fimc_dev *dev = fmd->fimc[i];
 754                 if (dev == NULL)
 755                         continue;
 756                 v4l2_device_unregister_subdev(&dev->vid_cap.subdev);
 757                 dev->vid_cap.ve.pipe = NULL;
 758                 fmd->fimc[i] = NULL;
 759         }
 760         for (i = 0; i < FIMC_LITE_MAX_DEVS; i++) {
 761                 struct fimc_lite *dev = fmd->fimc_lite[i];
 762                 if (dev == NULL)
 763                         continue;
 764                 v4l2_device_unregister_subdev(&dev->subdev);
 765                 dev->ve.pipe = NULL;
 766                 fmd->fimc_lite[i] = NULL;
 767         }
 768         for (i = 0; i < CSIS_MAX_ENTITIES; i++) {
 769                 if (fmd->csis[i].sd == NULL)
 770                         continue;
 771                 v4l2_device_unregister_subdev(fmd->csis[i].sd);
 772                 fmd->csis[i].sd = NULL;
 773         }
 774 
 775         if (fmd->fimc_is)
 776                 v4l2_device_unregister_subdev(&fmd->fimc_is->isp.subdev);
 777 
 778         v4l2_info(&fmd->v4l2_dev, "Unregistered all entities\n");
 779 }
 780 
 781 /**
 782  * __fimc_md_create_fimc_links - create links to all FIMC entities
 783  * @fmd: fimc media device
 784  * @source: the source entity to create links to all fimc entities from
 785  * @sensor: sensor subdev linked to FIMC[fimc_id] entity, may be null
 786  * @pad: the source entity pad index
 787  * @link_mask: bitmask of the fimc devices for which link should be enabled
 788  */
 789 static int __fimc_md_create_fimc_sink_links(struct fimc_md *fmd,
 790                                             struct media_entity *source,
 791                                             struct v4l2_subdev *sensor,
 792                                             int pad, int link_mask)
 793 {
 794         struct fimc_source_info *si = NULL;
 795         struct media_entity *sink;
 796         unsigned int flags = 0;
 797         int i, ret = 0;
 798 
 799         if (sensor) {
 800                 si = v4l2_get_subdev_hostdata(sensor);
 801                 /* Skip direct FIMC links in the logical FIMC-IS sensor path */
 802                 if (si && si->fimc_bus_type == FIMC_BUS_TYPE_ISP_WRITEBACK)
 803                         ret = 1;
 804         }
 805 
 806         for (i = 0; !ret && i < FIMC_MAX_DEVS; i++) {
 807                 if (!fmd->fimc[i])
 808                         continue;
 809                 /*
 810                  * Some FIMC variants are not fitted with camera capture
 811                  * interface. Skip creating a link from sensor for those.
 812                  */
 813                 if (!fmd->fimc[i]->variant->has_cam_if)
 814                         continue;
 815 
 816                 flags = ((1 << i) & link_mask) ? MEDIA_LNK_FL_ENABLED : 0;
 817 
 818                 sink = &fmd->fimc[i]->vid_cap.subdev.entity;
 819                 ret = media_create_pad_link(source, pad, sink,
 820                                               FIMC_SD_PAD_SINK_CAM, flags);
 821                 if (ret)
 822                         return ret;
 823 
 824                 /* Notify FIMC capture subdev entity */
 825                 ret = media_entity_call(sink, link_setup, &sink->pads[0],
 826                                         &source->pads[pad], flags);
 827                 if (ret)
 828                         break;
 829 
 830                 v4l2_info(&fmd->v4l2_dev, "created link [%s] %c> [%s]\n",
 831                           source->name, flags ? '=' : '-', sink->name);
 832         }
 833 
 834         for (i = 0; i < FIMC_LITE_MAX_DEVS; i++) {
 835                 if (!fmd->fimc_lite[i])
 836                         continue;
 837 
 838                 sink = &fmd->fimc_lite[i]->subdev.entity;
 839                 ret = media_create_pad_link(source, pad, sink,
 840                                                FLITE_SD_PAD_SINK, 0);
 841                 if (ret)
 842                         return ret;
 843 
 844                 /* Notify FIMC-LITE subdev entity */
 845                 ret = media_entity_call(sink, link_setup, &sink->pads[0],
 846                                         &source->pads[pad], 0);
 847                 if (ret)
 848                         break;
 849 
 850                 v4l2_info(&fmd->v4l2_dev, "created link [%s] -> [%s]\n",
 851                           source->name, sink->name);
 852         }
 853         return 0;
 854 }
 855 
 856 /* Create links from FIMC-LITE source pads to other entities */
 857 static int __fimc_md_create_flite_source_links(struct fimc_md *fmd)
 858 {
 859         struct media_entity *source, *sink;
 860         int i, ret = 0;
 861 
 862         for (i = 0; i < FIMC_LITE_MAX_DEVS; i++) {
 863                 struct fimc_lite *fimc = fmd->fimc_lite[i];
 864 
 865                 if (fimc == NULL)
 866                         continue;
 867 
 868                 source = &fimc->subdev.entity;
 869                 sink = &fimc->ve.vdev.entity;
 870                 /* FIMC-LITE's subdev and video node */
 871                 ret = media_create_pad_link(source, FLITE_SD_PAD_SOURCE_DMA,
 872                                                sink, 0, 0);
 873                 if (ret)
 874                         break;
 875                 /* Link from FIMC-LITE to IS-ISP subdev */
 876                 sink = &fmd->fimc_is->isp.subdev.entity;
 877                 ret = media_create_pad_link(source, FLITE_SD_PAD_SOURCE_ISP,
 878                                                sink, 0, 0);
 879                 if (ret)
 880                         break;
 881         }
 882 
 883         return ret;
 884 }
 885 
 886 /* Create FIMC-IS links */
 887 static int __fimc_md_create_fimc_is_links(struct fimc_md *fmd)
 888 {
 889         struct fimc_isp *isp = &fmd->fimc_is->isp;
 890         struct media_entity *source, *sink;
 891         int i, ret;
 892 
 893         source = &isp->subdev.entity;
 894 
 895         for (i = 0; i < FIMC_MAX_DEVS; i++) {
 896                 if (fmd->fimc[i] == NULL)
 897                         continue;
 898 
 899                 /* Link from FIMC-IS-ISP subdev to FIMC */
 900                 sink = &fmd->fimc[i]->vid_cap.subdev.entity;
 901                 ret = media_create_pad_link(source, FIMC_ISP_SD_PAD_SRC_FIFO,
 902                                                sink, FIMC_SD_PAD_SINK_FIFO, 0);
 903                 if (ret)
 904                         return ret;
 905         }
 906 
 907         /* Link from FIMC-IS-ISP subdev to fimc-is-isp.capture video node */
 908         sink = &isp->video_capture.ve.vdev.entity;
 909 
 910         /* Skip this link if the fimc-is-isp video node driver isn't built-in */
 911         if (sink->num_pads == 0)
 912                 return 0;
 913 
 914         return media_create_pad_link(source, FIMC_ISP_SD_PAD_SRC_DMA,
 915                                         sink, 0, 0);
 916 }
 917 
 918 /**
 919  * fimc_md_create_links - create default links between registered entities
 920  * @fmd: fimc media device
 921  *
 922  * Parallel interface sensor entities are connected directly to FIMC capture
 923  * entities. The sensors using MIPI CSIS bus are connected through immutable
 924  * link with CSI receiver entity specified by mux_id. Any registered CSIS
 925  * entity has a link to each registered FIMC capture entity. Enabled links
 926  * are created by default between each subsequent registered sensor and
 927  * subsequent FIMC capture entity. The number of default active links is
 928  * determined by the number of available sensors or FIMC entities,
 929  * whichever is less.
 930  */
 931 static int fimc_md_create_links(struct fimc_md *fmd)
 932 {
 933         struct v4l2_subdev *csi_sensors[CSIS_MAX_ENTITIES] = { NULL };
 934         struct v4l2_subdev *sensor, *csis;
 935         struct fimc_source_info *pdata;
 936         struct media_entity *source, *sink;
 937         int i, pad, fimc_id = 0, ret = 0;
 938         u32 flags, link_mask = 0;
 939 
 940         for (i = 0; i < fmd->num_sensors; i++) {
 941                 if (fmd->sensor[i].subdev == NULL)
 942                         continue;
 943 
 944                 sensor = fmd->sensor[i].subdev;
 945                 pdata = v4l2_get_subdev_hostdata(sensor);
 946                 if (!pdata)
 947                         continue;
 948 
 949                 source = NULL;
 950 
 951                 switch (pdata->sensor_bus_type) {
 952                 case FIMC_BUS_TYPE_MIPI_CSI2:
 953                         if (WARN(pdata->mux_id >= CSIS_MAX_ENTITIES,
 954                                 "Wrong CSI channel id: %d\n", pdata->mux_id))
 955                                 return -EINVAL;
 956 
 957                         csis = fmd->csis[pdata->mux_id].sd;
 958                         if (WARN(csis == NULL,
 959                                  "MIPI-CSI interface specified but s5p-csis module is not loaded!\n"))
 960                                 return -EINVAL;
 961 
 962                         pad = sensor->entity.num_pads - 1;
 963                         ret = media_create_pad_link(&sensor->entity, pad,
 964                                               &csis->entity, CSIS_PAD_SINK,
 965                                               MEDIA_LNK_FL_IMMUTABLE |
 966                                               MEDIA_LNK_FL_ENABLED);
 967                         if (ret)
 968                                 return ret;
 969 
 970                         v4l2_info(&fmd->v4l2_dev, "created link [%s] => [%s]\n",
 971                                   sensor->entity.name, csis->entity.name);
 972 
 973                         source = NULL;
 974                         csi_sensors[pdata->mux_id] = sensor;
 975                         break;
 976 
 977                 case FIMC_BUS_TYPE_ITU_601...FIMC_BUS_TYPE_ITU_656:
 978                         source = &sensor->entity;
 979                         pad = 0;
 980                         break;
 981 
 982                 default:
 983                         v4l2_err(&fmd->v4l2_dev, "Wrong bus_type: %x\n",
 984                                  pdata->sensor_bus_type);
 985                         return -EINVAL;
 986                 }
 987                 if (source == NULL)
 988                         continue;
 989 
 990                 link_mask = 1 << fimc_id++;
 991                 ret = __fimc_md_create_fimc_sink_links(fmd, source, sensor,
 992                                                        pad, link_mask);
 993         }
 994 
 995         for (i = 0; i < CSIS_MAX_ENTITIES; i++) {
 996                 if (fmd->csis[i].sd == NULL)
 997                         continue;
 998 
 999                 source = &fmd->csis[i].sd->entity;
1000                 pad = CSIS_PAD_SOURCE;
1001                 sensor = csi_sensors[i];
1002 
1003                 link_mask = 1 << fimc_id++;
1004                 ret = __fimc_md_create_fimc_sink_links(fmd, source, sensor,
1005                                                        pad, link_mask);
1006         }
1007 
1008         /* Create immutable links between each FIMC's subdev and video node */
1009         flags = MEDIA_LNK_FL_IMMUTABLE | MEDIA_LNK_FL_ENABLED;
1010         for (i = 0; i < FIMC_MAX_DEVS; i++) {
1011                 if (!fmd->fimc[i])
1012                         continue;
1013 
1014                 source = &fmd->fimc[i]->vid_cap.subdev.entity;
1015                 sink = &fmd->fimc[i]->vid_cap.ve.vdev.entity;
1016 
1017                 ret = media_create_pad_link(source, FIMC_SD_PAD_SOURCE,
1018                                               sink, 0, flags);
1019                 if (ret)
1020                         break;
1021         }
1022 
1023         ret = __fimc_md_create_flite_source_links(fmd);
1024         if (ret < 0)
1025                 return ret;
1026 
1027         if (fmd->use_isp)
1028                 ret = __fimc_md_create_fimc_is_links(fmd);
1029 
1030         return ret;
1031 }
1032 
1033 /*
1034  * The peripheral sensor and CAM_BLK (PIXELASYNCMx) clocks management.
1035  */
1036 static void fimc_md_put_clocks(struct fimc_md *fmd)
1037 {
1038         int i = FIMC_MAX_CAMCLKS;
1039 
1040         while (--i >= 0) {
1041                 if (IS_ERR(fmd->camclk[i].clock))
1042                         continue;
1043                 clk_put(fmd->camclk[i].clock);
1044                 fmd->camclk[i].clock = ERR_PTR(-EINVAL);
1045         }
1046 
1047         /* Writeback (PIXELASYNCMx) clocks */
1048         for (i = 0; i < FIMC_MAX_WBCLKS; i++) {
1049                 if (IS_ERR(fmd->wbclk[i]))
1050                         continue;
1051                 clk_put(fmd->wbclk[i]);
1052                 fmd->wbclk[i] = ERR_PTR(-EINVAL);
1053         }
1054 }
1055 
1056 static int fimc_md_get_clocks(struct fimc_md *fmd)
1057 {
1058         struct device *dev = &fmd->pdev->dev;
1059         char clk_name[32];
1060         struct clk *clock;
1061         int i, ret = 0;
1062 
1063         for (i = 0; i < FIMC_MAX_CAMCLKS; i++)
1064                 fmd->camclk[i].clock = ERR_PTR(-EINVAL);
1065 
1066         for (i = 0; i < FIMC_MAX_CAMCLKS; i++) {
1067                 snprintf(clk_name, sizeof(clk_name), "sclk_cam%u", i);
1068                 clock = clk_get(dev, clk_name);
1069 
1070                 if (IS_ERR(clock)) {
1071                         dev_err(dev, "Failed to get clock: %s\n", clk_name);
1072                         ret = PTR_ERR(clock);
1073                         break;
1074                 }
1075                 fmd->camclk[i].clock = clock;
1076         }
1077         if (ret)
1078                 fimc_md_put_clocks(fmd);
1079 
1080         if (!fmd->use_isp)
1081                 return 0;
1082         /*
1083          * For now get only PIXELASYNCM1 clock (Writeback B/ISP),
1084          * leave PIXELASYNCM0 out for the LCD Writeback driver.
1085          */
1086         fmd->wbclk[CLK_IDX_WB_A] = ERR_PTR(-EINVAL);
1087 
1088         for (i = CLK_IDX_WB_B; i < FIMC_MAX_WBCLKS; i++) {
1089                 snprintf(clk_name, sizeof(clk_name), "pxl_async%u", i);
1090                 clock = clk_get(dev, clk_name);
1091                 if (IS_ERR(clock)) {
1092                         v4l2_err(&fmd->v4l2_dev, "Failed to get clock: %s\n",
1093                                   clk_name);
1094                         ret = PTR_ERR(clock);
1095                         break;
1096                 }
1097                 fmd->wbclk[i] = clock;
1098         }
1099         if (ret)
1100                 fimc_md_put_clocks(fmd);
1101 
1102         return ret;
1103 }
1104 
1105 static int __fimc_md_modify_pipeline(struct media_entity *entity, bool enable)
1106 {
1107         struct exynos_video_entity *ve;
1108         struct fimc_pipeline *p;
1109         struct video_device *vdev;
1110         int ret;
1111 
1112         vdev = media_entity_to_video_device(entity);
1113         if (vdev->entity.use_count == 0)
1114                 return 0;
1115 
1116         ve = vdev_to_exynos_video_entity(vdev);
1117         p = to_fimc_pipeline(ve->pipe);
1118         /*
1119          * Nothing to do if we are disabling the pipeline, some link
1120          * has been disconnected and p->subdevs array is cleared now.
1121          */
1122         if (!enable && p->subdevs[IDX_SENSOR] == NULL)
1123                 return 0;
1124 
1125         if (enable)
1126                 ret = __fimc_pipeline_open(ve->pipe, entity, true);
1127         else
1128                 ret = __fimc_pipeline_close(ve->pipe);
1129 
1130         if (ret == 0 && !enable)
1131                 memset(p->subdevs, 0, sizeof(p->subdevs));
1132 
1133         return ret;
1134 }
1135 
1136 /* Locking: called with entity->graph_obj.mdev->graph_mutex mutex held. */
1137 static int __fimc_md_modify_pipelines(struct media_entity *entity, bool enable,
1138                                       struct media_graph *graph)
1139 {
1140         struct media_entity *entity_err = entity;
1141         int ret;
1142 
1143         /*
1144          * Walk current graph and call the pipeline open/close routine for each
1145          * opened video node that belongs to the graph of entities connected
1146          * through active links. This is needed as we cannot power on/off the
1147          * subdevs in random order.
1148          */
1149         media_graph_walk_start(graph, entity);
1150 
1151         while ((entity = media_graph_walk_next(graph))) {
1152                 if (!is_media_entity_v4l2_video_device(entity))
1153                         continue;
1154 
1155                 ret  = __fimc_md_modify_pipeline(entity, enable);
1156 
1157                 if (ret < 0)
1158                         goto err;
1159         }
1160 
1161         return 0;
1162 
1163 err:
1164         media_graph_walk_start(graph, entity_err);
1165 
1166         while ((entity_err = media_graph_walk_next(graph))) {
1167                 if (!is_media_entity_v4l2_video_device(entity_err))
1168                         continue;
1169 
1170                 __fimc_md_modify_pipeline(entity_err, !enable);
1171 
1172                 if (entity_err == entity)
1173                         break;
1174         }
1175 
1176         return ret;
1177 }
1178 
1179 static int fimc_md_link_notify(struct media_link *link, unsigned int flags,
1180                                 unsigned int notification)
1181 {
1182         struct media_graph *graph =
1183                 &container_of(link->graph_obj.mdev, struct fimc_md,
1184                               media_dev)->link_setup_graph;
1185         struct media_entity *sink = link->sink->entity;
1186         int ret = 0;
1187 
1188         /* Before link disconnection */
1189         if (notification == MEDIA_DEV_NOTIFY_PRE_LINK_CH) {
1190                 ret = media_graph_walk_init(graph,
1191                                                    link->graph_obj.mdev);
1192                 if (ret)
1193                         return ret;
1194                 if (!(flags & MEDIA_LNK_FL_ENABLED))
1195                         ret = __fimc_md_modify_pipelines(sink, false, graph);
1196 #if 0
1197                 else
1198                         /* TODO: Link state change validation */
1199 #endif
1200         /* After link activation */
1201         } else if (notification == MEDIA_DEV_NOTIFY_POST_LINK_CH) {
1202                 if (link->flags & MEDIA_LNK_FL_ENABLED)
1203                         ret = __fimc_md_modify_pipelines(sink, true, graph);
1204                 media_graph_walk_cleanup(graph);
1205         }
1206 
1207         return ret ? -EPIPE : 0;
1208 }
1209 
1210 static const struct media_device_ops fimc_md_ops = {
1211         .link_notify = fimc_md_link_notify,
1212 };
1213 
1214 static ssize_t fimc_md_sysfs_show(struct device *dev,
1215                                   struct device_attribute *attr, char *buf)
1216 {
1217         struct fimc_md *fmd = dev_get_drvdata(dev);
1218 
1219         if (fmd->user_subdev_api)
1220                 return strscpy(buf, "Sub-device API (sub-dev)\n", PAGE_SIZE);
1221 
1222         return strscpy(buf, "V4L2 video node only API (vid-dev)\n", PAGE_SIZE);
1223 }
1224 
1225 static ssize_t fimc_md_sysfs_store(struct device *dev,
1226                                    struct device_attribute *attr,
1227                                    const char *buf, size_t count)
1228 {
1229         struct fimc_md *fmd = dev_get_drvdata(dev);
1230         bool subdev_api;
1231         int i;
1232 
1233         if (!strcmp(buf, "vid-dev\n"))
1234                 subdev_api = false;
1235         else if (!strcmp(buf, "sub-dev\n"))
1236                 subdev_api = true;
1237         else
1238                 return count;
1239 
1240         fmd->user_subdev_api = subdev_api;
1241         for (i = 0; i < FIMC_MAX_DEVS; i++)
1242                 if (fmd->fimc[i])
1243                         fmd->fimc[i]->vid_cap.user_subdev_api = subdev_api;
1244         return count;
1245 }
1246 /*
1247  * This device attribute is to select video pipeline configuration method.
1248  * There are following valid values:
1249  *  vid-dev - for V4L2 video node API only, subdevice will be configured
1250  *  by the host driver.
1251  *  sub-dev - for media controller API, subdevs must be configured in user
1252  *  space before starting streaming.
1253  */
1254 static DEVICE_ATTR(subdev_conf_mode, S_IWUSR | S_IRUGO,
1255                    fimc_md_sysfs_show, fimc_md_sysfs_store);
1256 
1257 static int fimc_md_get_pinctrl(struct fimc_md *fmd)
1258 {
1259         struct device *dev = &fmd->pdev->dev;
1260         struct fimc_pinctrl *pctl = &fmd->pinctl;
1261 
1262         pctl->pinctrl = devm_pinctrl_get(dev);
1263         if (IS_ERR(pctl->pinctrl))
1264                 return PTR_ERR(pctl->pinctrl);
1265 
1266         pctl->state_default = pinctrl_lookup_state(pctl->pinctrl,
1267                                         PINCTRL_STATE_DEFAULT);
1268         if (IS_ERR(pctl->state_default))
1269                 return PTR_ERR(pctl->state_default);
1270 
1271         pctl->state_idle = pinctrl_lookup_state(pctl->pinctrl,
1272                                         PINCTRL_STATE_IDLE);
1273         return 0;
1274 }
1275 
1276 static int cam_clk_prepare(struct clk_hw *hw)
1277 {
1278         struct cam_clk *camclk = to_cam_clk(hw);
1279         int ret;
1280 
1281         if (camclk->fmd->pmf == NULL)
1282                 return -ENODEV;
1283 
1284         ret = pm_runtime_get_sync(camclk->fmd->pmf);
1285         return ret < 0 ? ret : 0;
1286 }
1287 
1288 static void cam_clk_unprepare(struct clk_hw *hw)
1289 {
1290         struct cam_clk *camclk = to_cam_clk(hw);
1291 
1292         if (camclk->fmd->pmf == NULL)
1293                 return;
1294 
1295         pm_runtime_put_sync(camclk->fmd->pmf);
1296 }
1297 
1298 static const struct clk_ops cam_clk_ops = {
1299         .prepare = cam_clk_prepare,
1300         .unprepare = cam_clk_unprepare,
1301 };
1302 
1303 static void fimc_md_unregister_clk_provider(struct fimc_md *fmd)
1304 {
1305         struct cam_clk_provider *cp = &fmd->clk_provider;
1306         unsigned int i;
1307 
1308         if (cp->of_node)
1309                 of_clk_del_provider(cp->of_node);
1310 
1311         for (i = 0; i < cp->num_clocks; i++)
1312                 clk_unregister(cp->clks[i]);
1313 }
1314 
1315 static int fimc_md_register_clk_provider(struct fimc_md *fmd)
1316 {
1317         struct cam_clk_provider *cp = &fmd->clk_provider;
1318         struct device *dev = &fmd->pdev->dev;
1319         int i, ret;
1320 
1321         for (i = 0; i < FIMC_MAX_CAMCLKS; i++) {
1322                 struct cam_clk *camclk = &cp->camclk[i];
1323                 struct clk_init_data init;
1324                 const char *p_name;
1325 
1326                 ret = of_property_read_string_index(dev->of_node,
1327                                         "clock-output-names", i, &init.name);
1328                 if (ret < 0)
1329                         break;
1330 
1331                 p_name = __clk_get_name(fmd->camclk[i].clock);
1332 
1333                 /* It's safe since clk_register() will duplicate the string. */
1334                 init.parent_names = &p_name;
1335                 init.num_parents = 1;
1336                 init.ops = &cam_clk_ops;
1337                 init.flags = CLK_SET_RATE_PARENT;
1338                 camclk->hw.init = &init;
1339                 camclk->fmd = fmd;
1340 
1341                 cp->clks[i] = clk_register(NULL, &camclk->hw);
1342                 if (IS_ERR(cp->clks[i])) {
1343                         dev_err(dev, "failed to register clock: %s (%ld)\n",
1344                                         init.name, PTR_ERR(cp->clks[i]));
1345                         ret = PTR_ERR(cp->clks[i]);
1346                         goto err;
1347                 }
1348                 cp->num_clocks++;
1349         }
1350 
1351         if (cp->num_clocks == 0) {
1352                 dev_warn(dev, "clk provider not registered\n");
1353                 return 0;
1354         }
1355 
1356         cp->clk_data.clks = cp->clks;
1357         cp->clk_data.clk_num = cp->num_clocks;
1358         cp->of_node = dev->of_node;
1359         ret = of_clk_add_provider(dev->of_node, of_clk_src_onecell_get,
1360                                   &cp->clk_data);
1361         if (ret == 0)
1362                 return 0;
1363 err:
1364         fimc_md_unregister_clk_provider(fmd);
1365         return ret;
1366 }
1367 
1368 static int subdev_notifier_bound(struct v4l2_async_notifier *notifier,
1369                                  struct v4l2_subdev *subdev,
1370                                  struct v4l2_async_subdev *asd)
1371 {
1372         struct fimc_md *fmd = notifier_to_fimc_md(notifier);
1373         struct fimc_sensor_info *si = NULL;
1374         int i;
1375 
1376         /* Find platform data for this sensor subdev */
1377         for (i = 0; i < ARRAY_SIZE(fmd->sensor); i++)
1378                 if (fmd->sensor[i].asd.match.fwnode ==
1379                     of_fwnode_handle(subdev->dev->of_node))
1380                         si = &fmd->sensor[i];
1381 
1382         if (si == NULL)
1383                 return -EINVAL;
1384 
1385         v4l2_set_subdev_hostdata(subdev, &si->pdata);
1386 
1387         if (si->pdata.fimc_bus_type == FIMC_BUS_TYPE_ISP_WRITEBACK)
1388                 subdev->grp_id = GRP_ID_FIMC_IS_SENSOR;
1389         else
1390                 subdev->grp_id = GRP_ID_SENSOR;
1391 
1392         si->subdev = subdev;
1393 
1394         v4l2_info(&fmd->v4l2_dev, "Registered sensor subdevice: %s (%d)\n",
1395                   subdev->name, fmd->num_sensors);
1396 
1397         fmd->num_sensors++;
1398 
1399         return 0;
1400 }
1401 
1402 static int subdev_notifier_complete(struct v4l2_async_notifier *notifier)
1403 {
1404         struct fimc_md *fmd = notifier_to_fimc_md(notifier);
1405         int ret;
1406 
1407         mutex_lock(&fmd->media_dev.graph_mutex);
1408 
1409         ret = fimc_md_create_links(fmd);
1410         if (ret < 0)
1411                 goto unlock;
1412 
1413         ret = v4l2_device_register_subdev_nodes(&fmd->v4l2_dev);
1414 unlock:
1415         mutex_unlock(&fmd->media_dev.graph_mutex);
1416         if (ret < 0)
1417                 return ret;
1418 
1419         return media_device_register(&fmd->media_dev);
1420 }
1421 
1422 static const struct v4l2_async_notifier_operations subdev_notifier_ops = {
1423         .bound = subdev_notifier_bound,
1424         .complete = subdev_notifier_complete,
1425 };
1426 
1427 static int fimc_md_probe(struct platform_device *pdev)
1428 {
1429         struct device *dev = &pdev->dev;
1430         struct v4l2_device *v4l2_dev;
1431         struct fimc_md *fmd;
1432         int ret;
1433 
1434         fmd = devm_kzalloc(dev, sizeof(*fmd), GFP_KERNEL);
1435         if (!fmd)
1436                 return -ENOMEM;
1437 
1438         spin_lock_init(&fmd->slock);
1439         INIT_LIST_HEAD(&fmd->pipelines);
1440         fmd->pdev = pdev;
1441 
1442         strscpy(fmd->media_dev.model, "SAMSUNG S5P FIMC",
1443                 sizeof(fmd->media_dev.model));
1444         fmd->media_dev.ops = &fimc_md_ops;
1445         fmd->media_dev.dev = dev;
1446 
1447         v4l2_dev = &fmd->v4l2_dev;
1448         v4l2_dev->mdev = &fmd->media_dev;
1449         v4l2_dev->notify = fimc_sensor_notify;
1450         strscpy(v4l2_dev->name, "s5p-fimc-md", sizeof(v4l2_dev->name));
1451 
1452         fmd->use_isp = fimc_md_is_isp_available(dev->of_node);
1453         fmd->user_subdev_api = true;
1454 
1455         media_device_init(&fmd->media_dev);
1456 
1457         ret = v4l2_device_register(dev, &fmd->v4l2_dev);
1458         if (ret < 0) {
1459                 v4l2_err(v4l2_dev, "Failed to register v4l2_device: %d\n", ret);
1460                 goto err_md;
1461         }
1462 
1463         ret = fimc_md_get_clocks(fmd);
1464         if (ret)
1465                 goto err_v4l2dev;
1466 
1467         ret = fimc_md_get_pinctrl(fmd);
1468         if (ret < 0) {
1469                 if (ret != EPROBE_DEFER)
1470                         dev_err(dev, "Failed to get pinctrl: %d\n", ret);
1471                 goto err_clk;
1472         }
1473 
1474         platform_set_drvdata(pdev, fmd);
1475 
1476         v4l2_async_notifier_init(&fmd->subdev_notifier);
1477 
1478         ret = fimc_md_register_platform_entities(fmd, dev->of_node);
1479         if (ret)
1480                 goto err_clk;
1481 
1482         ret = fimc_md_register_sensor_entities(fmd);
1483         if (ret)
1484                 goto err_m_ent;
1485 
1486         ret = device_create_file(&pdev->dev, &dev_attr_subdev_conf_mode);
1487         if (ret)
1488                 goto err_cleanup;
1489         /*
1490          * FIMC platform devices need to be registered before the sclk_cam
1491          * clocks provider, as one of these devices needs to be activated
1492          * to enable the clock.
1493          */
1494         ret = fimc_md_register_clk_provider(fmd);
1495         if (ret < 0) {
1496                 v4l2_err(v4l2_dev, "clock provider registration failed\n");
1497                 goto err_attr;
1498         }
1499 
1500         if (fmd->num_sensors > 0) {
1501                 fmd->subdev_notifier.ops = &subdev_notifier_ops;
1502                 fmd->num_sensors = 0;
1503 
1504                 ret = v4l2_async_notifier_register(&fmd->v4l2_dev,
1505                                                 &fmd->subdev_notifier);
1506                 if (ret)
1507                         goto err_clk_p;
1508         }
1509 
1510         return 0;
1511 
1512 err_clk_p:
1513         fimc_md_unregister_clk_provider(fmd);
1514 err_attr:
1515         device_remove_file(&pdev->dev, &dev_attr_subdev_conf_mode);
1516 err_cleanup:
1517         v4l2_async_notifier_cleanup(&fmd->subdev_notifier);
1518 err_m_ent:
1519         fimc_md_unregister_entities(fmd);
1520 err_clk:
1521         fimc_md_put_clocks(fmd);
1522 err_v4l2dev:
1523         v4l2_device_unregister(&fmd->v4l2_dev);
1524 err_md:
1525         media_device_cleanup(&fmd->media_dev);
1526         return ret;
1527 }
1528 
1529 static int fimc_md_remove(struct platform_device *pdev)
1530 {
1531         struct fimc_md *fmd = platform_get_drvdata(pdev);
1532 
1533         if (!fmd)
1534                 return 0;
1535 
1536         fimc_md_unregister_clk_provider(fmd);
1537         v4l2_async_notifier_unregister(&fmd->subdev_notifier);
1538         v4l2_async_notifier_cleanup(&fmd->subdev_notifier);
1539 
1540         v4l2_device_unregister(&fmd->v4l2_dev);
1541         device_remove_file(&pdev->dev, &dev_attr_subdev_conf_mode);
1542         fimc_md_unregister_entities(fmd);
1543         fimc_md_pipelines_free(fmd);
1544         media_device_unregister(&fmd->media_dev);
1545         media_device_cleanup(&fmd->media_dev);
1546         fimc_md_put_clocks(fmd);
1547 
1548         return 0;
1549 }
1550 
1551 static const struct platform_device_id fimc_driver_ids[] __always_unused = {
1552         { .name = "s5p-fimc-md" },
1553         { },
1554 };
1555 MODULE_DEVICE_TABLE(platform, fimc_driver_ids);
1556 
1557 static const struct of_device_id fimc_md_of_match[] = {
1558         { .compatible = "samsung,fimc" },
1559         { },
1560 };
1561 MODULE_DEVICE_TABLE(of, fimc_md_of_match);
1562 
1563 static struct platform_driver fimc_md_driver = {
1564         .probe          = fimc_md_probe,
1565         .remove         = fimc_md_remove,
1566         .driver = {
1567                 .of_match_table = of_match_ptr(fimc_md_of_match),
1568                 .name           = "s5p-fimc-md",
1569         }
1570 };
1571 
1572 static int __init fimc_md_init(void)
1573 {
1574         int ret;
1575 
1576         request_module("s5p-csis");
1577         ret = fimc_register_driver();
1578         if (ret)
1579                 return ret;
1580 
1581         return platform_driver_register(&fimc_md_driver);
1582 }
1583 
1584 static void __exit fimc_md_exit(void)
1585 {
1586         platform_driver_unregister(&fimc_md_driver);
1587         fimc_unregister_driver();
1588 }
1589 
1590 module_init(fimc_md_init);
1591 module_exit(fimc_md_exit);
1592 
1593 MODULE_AUTHOR("Sylwester Nawrocki <s.nawrocki@samsung.com>");
1594 MODULE_DESCRIPTION("S5P FIMC camera host interface/video postprocessor driver");
1595 MODULE_LICENSE("GPL");
1596 MODULE_VERSION("2.0.1");
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/media/platform/exynos4-is/media-dev.c

DEFINITIONS
