drivers/media/platform/vsp1/vsp1_entity.c

   1 /*
   2  * vsp1_entity.c  --  R-Car VSP1 Base Entity
   3  *
   4  * Copyright (C) 2013-2014 Renesas Electronics Corporation
   5  *
   6  * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  */
  13
  14 #include <linux/device.h>
  15 #include <linux/gfp.h>
  16
  17 #include <media/media-entity.h>
  18 #include <media/v4l2-ctrls.h>
  19 #include <media/v4l2-subdev.h>
  20
  21 #include "vsp1.h"
  22 #include "vsp1_dl.h"
  23 #include "vsp1_entity.h"
  24
  25 void vsp1_entity_route_setup(struct vsp1_entity *source,
  26                              struct vsp1_dl_list *dl)
  27 {
  28         struct vsp1_entity *sink;
  29
  30         if (source->route->reg == 0)
  31                 return;
  32
  33         sink = container_of(source->sink, struct vsp1_entity, subdev.entity);
  34         vsp1_dl_list_write(dl, source->route->reg,
  35                            sink->route->inputs[source->sink_pad]);
  36 }
  37
  38 /* -----------------------------------------------------------------------------
  39  * V4L2 Subdevice Operations
  40  */
  41
  42 /**
  43  * vsp1_entity_get_pad_config - Get the pad configuration for an entity
  44  * @entity: the entity
  45  * @cfg: the TRY pad configuration
  46  * @which: configuration selector (ACTIVE or TRY)
  47  *
  48  * Return the pad configuration requested by the which argument. The TRY
  49  * configuration is passed explicitly to the function through the cfg argument
  50  * and simply returned when requested. The ACTIVE configuration comes from the
  51  * entity structure.
  52  */
  53 struct v4l2_subdev_pad_config *
  54 vsp1_entity_get_pad_config(struct vsp1_entity *entity,
  55                            struct v4l2_subdev_pad_config *cfg,
  56                            enum v4l2_subdev_format_whence which)
  57 {
  58         switch (which) {
  59         case V4L2_SUBDEV_FORMAT_ACTIVE:
  60                 return entity->config;
  61         case V4L2_SUBDEV_FORMAT_TRY:
  62         default:
  63                 return cfg;
  64         }
  65 }
  66
  67 /**
  68  * vsp1_entity_get_pad_format - Get a pad format from storage for an entity
  69  * @entity: the entity
  70  * @cfg: the configuration storage
  71  * @pad: the pad number
  72  *
  73  * Return the format stored in the given configuration for an entity's pad. The
  74  * configuration can be an ACTIVE or TRY configuration.
  75  */
  76 struct v4l2_mbus_framefmt *
  77 vsp1_entity_get_pad_format(struct vsp1_entity *entity,
  78                            struct v4l2_subdev_pad_config *cfg,
  79                            unsigned int pad)
  80 {
  81         return v4l2_subdev_get_try_format(&entity->subdev, cfg, pad);
  82 }
  83
  84 struct v4l2_rect *
  85 vsp1_entity_get_pad_compose(struct vsp1_entity *entity,
  86                             struct v4l2_subdev_pad_config *cfg,
  87                             unsigned int pad)
  88 {
  89         return v4l2_subdev_get_try_compose(&entity->subdev, cfg, pad);
  90 }
  91
  92 /*
  93  * vsp1_entity_init_cfg - Initialize formats on all pads
  94  * @subdev: V4L2 subdevice
  95  * @cfg: V4L2 subdev pad configuration
  96  *
  97  * Initialize all pad formats with default values in the given pad config. This
  98  * function can be used as a handler for the subdev pad::init_cfg operation.
  99  */
 100 int vsp1_entity_init_cfg(struct v4l2_subdev *subdev,
 101                          struct v4l2_subdev_pad_config *cfg)
 102 {
 103         struct v4l2_subdev_format format;
 104         unsigned int pad;
 105
 106         for (pad = 0; pad < subdev->entity.num_pads - 1; ++pad) {
 107                 memset(&format, 0, sizeof(format));
 108
 109                 format.pad = pad;
 110                 format.which = cfg ? V4L2_SUBDEV_FORMAT_TRY
 111                              : V4L2_SUBDEV_FORMAT_ACTIVE;
 112
 113                 v4l2_subdev_call(subdev, pad, set_fmt, cfg, &format);
 114         }
 115
 116         return 0;
 117 }
 118
 119 /*
 120  * vsp1_subdev_get_pad_format - Subdev pad get_fmt handler
 121  * @subdev: V4L2 subdevice
 122  * @cfg: V4L2 subdev pad configuration
 123  * @fmt: V4L2 subdev format
 124  *
 125  * This function implements the subdev get_fmt pad operation. It can be used as
 126  * a direct drop-in for the operation handler.
 127  */
 128 int vsp1_subdev_get_pad_format(struct v4l2_subdev *subdev,
 129                                struct v4l2_subdev_pad_config *cfg,
 130                                struct v4l2_subdev_format *fmt)
 131 {
 132         struct vsp1_entity *entity = to_vsp1_entity(subdev);
 133         struct v4l2_subdev_pad_config *config;
 134
 135         config = vsp1_entity_get_pad_config(entity, cfg, fmt->which);
 136         if (!config)
 137                 return -EINVAL;
 138
 139         fmt->format = *vsp1_entity_get_pad_format(entity, config, fmt->pad);
 140
 141         return 0;
 142 }
 143
 144 /*
 145  * vsp1_subdev_enum_mbus_code - Subdev pad enum_mbus_code handler
 146  * @subdev: V4L2 subdevice
 147  * @cfg: V4L2 subdev pad configuration
 148  * @code: Media bus code enumeration
 149  * @codes: Array of supported media bus codes
 150  * @ncodes: Number of supported media bus codes
 151  *
 152  * This function implements the subdev enum_mbus_code pad operation for entities
 153  * that do not support format conversion. It enumerates the given supported
 154  * media bus codes on the sink pad and reports a source pad format identical to
 155  * the sink pad.
 156  */
 157 int vsp1_subdev_enum_mbus_code(struct v4l2_subdev *subdev,
 158                                struct v4l2_subdev_pad_config *cfg,
 159                                struct v4l2_subdev_mbus_code_enum *code,
 160                                const unsigned int *codes, unsigned int ncodes)
 161 {
 162         struct vsp1_entity *entity = to_vsp1_entity(subdev);
 163
 164         if (code->pad == 0) {
 165                 if (code->index >= ncodes)
 166                         return -EINVAL;
 167
 168                 code->code = codes[code->index];
 169         } else {
 170                 struct v4l2_subdev_pad_config *config;
 171                 struct v4l2_mbus_framefmt *format;
 172
 173                 /* The entity can't perform format conversion, the sink format
 174                  * is always identical to the source format.
 175                  */
 176                 if (code->index)
 177                         return -EINVAL;
 178
 179                 config = vsp1_entity_get_pad_config(entity, cfg, code->which);
 180                 if (!config)
 181                         return -EINVAL;
 182
 183                 format = vsp1_entity_get_pad_format(entity, config, 0);
 184                 code->code = format->code;
 185         }
 186
 187         return 0;
 188 }
 189
 190 /*
 191  * vsp1_subdev_enum_frame_size - Subdev pad enum_frame_size handler
 192  * @subdev: V4L2 subdevice
 193  * @cfg: V4L2 subdev pad configuration
 194  * @fse: Frame size enumeration
 195  * @min_width: Minimum image width
 196  * @min_height: Minimum image height
 197  * @max_width: Maximum image width
 198  * @max_height: Maximum image height
 199  *
 200  * This function implements the subdev enum_frame_size pad operation for
 201  * entities that do not support scaling or cropping. It reports the given
 202  * minimum and maximum frame width and height on the sink pad, and a fixed
 203  * source pad size identical to the sink pad.
 204  */
 205 int vsp1_subdev_enum_frame_size(struct v4l2_subdev *subdev,
 206                                 struct v4l2_subdev_pad_config *cfg,
 207                                 struct v4l2_subdev_frame_size_enum *fse,
 208                                 unsigned int min_width, unsigned int min_height,
 209                                 unsigned int max_width, unsigned int max_height)
 210 {
 211         struct vsp1_entity *entity = to_vsp1_entity(subdev);
 212         struct v4l2_subdev_pad_config *config;
 213         struct v4l2_mbus_framefmt *format;
 214
 215         config = vsp1_entity_get_pad_config(entity, cfg, fse->which);
 216         if (!config)
 217                 return -EINVAL;
 218
 219         format = vsp1_entity_get_pad_format(entity, config, fse->pad);
 220
 221         if (fse->index || fse->code != format->code)
 222                 return -EINVAL;
 223
 224         if (fse->pad == 0) {
 225                 fse->min_width = min_width;
 226                 fse->max_width = max_width;
 227                 fse->min_height = min_height;
 228                 fse->max_height = max_height;
 229         } else {
 230                 /* The size on the source pad are fixed and always identical to
 231                  * the size on the sink pad.
 232                  */
 233                 fse->min_width = format->width;
 234                 fse->max_width = format->width;
 235                 fse->min_height = format->height;
 236                 fse->max_height = format->height;
 237         }
 238
 239         return 0;
 240 }
 241
 242 /* -----------------------------------------------------------------------------
 243  * Media Operations
 244  */
 245
 246 int vsp1_entity_link_setup(struct media_entity *entity,
 247                            const struct media_pad *local,
 248                            const struct media_pad *remote, u32 flags)
 249 {
 250         struct vsp1_entity *source;
 251
 252         if (!(local->flags & MEDIA_PAD_FL_SOURCE))
 253                 return 0;
 254
 255         source = container_of(local->entity, struct vsp1_entity, subdev.entity);
 256
 257         if (!source->route)
 258                 return 0;
 259
 260         if (flags & MEDIA_LNK_FL_ENABLED) {
 261                 if (source->sink)
 262                         return -EBUSY;
 263                 source->sink = remote->entity;
 264                 source->sink_pad = remote->index;
 265         } else {
 266                 source->sink = NULL;
 267                 source->sink_pad = 0;
 268         }
 269
 270         return 0;
 271 }
 272
 273 /* -----------------------------------------------------------------------------
 274  * Initialization
 275  */
 276
 277 #define VSP1_ENTITY_ROUTE(ent)                                          \
 278         { VSP1_ENTITY_##ent, 0, VI6_DPR_##ent##_ROUTE,                  \
 279           { VI6_DPR_NODE_##ent }, VI6_DPR_NODE_##ent }
 280
 281 #define VSP1_ENTITY_ROUTE_RPF(idx)                                      \
 282         { VSP1_ENTITY_RPF, idx, VI6_DPR_RPF_ROUTE(idx),                 \
 283           { 0, }, VI6_DPR_NODE_RPF(idx) }
 284
 285 #define VSP1_ENTITY_ROUTE_UDS(idx)                                      \
 286         { VSP1_ENTITY_UDS, idx, VI6_DPR_UDS_ROUTE(idx),                 \
 287           { VI6_DPR_NODE_UDS(idx) }, VI6_DPR_NODE_UDS(idx) }
 288
 289 #define VSP1_ENTITY_ROUTE_WPF(idx)                                      \
 290         { VSP1_ENTITY_WPF, idx, 0,                                      \
 291           { VI6_DPR_NODE_WPF(idx) }, VI6_DPR_NODE_WPF(idx) }
 292
 293 static const struct vsp1_route vsp1_routes[] = {
 294         { VSP1_ENTITY_BRU, 0, VI6_DPR_BRU_ROUTE,
 295           { VI6_DPR_NODE_BRU_IN(0), VI6_DPR_NODE_BRU_IN(1),
 296             VI6_DPR_NODE_BRU_IN(2), VI6_DPR_NODE_BRU_IN(3),
 297             VI6_DPR_NODE_BRU_IN(4) }, VI6_DPR_NODE_BRU_OUT },
 298         VSP1_ENTITY_ROUTE(HSI),
 299         VSP1_ENTITY_ROUTE(HST),
 300         { VSP1_ENTITY_LIF, 0, 0, { VI6_DPR_NODE_LIF, }, VI6_DPR_NODE_LIF },
 301         VSP1_ENTITY_ROUTE(LUT),
 302         VSP1_ENTITY_ROUTE_RPF(0),
 303         VSP1_ENTITY_ROUTE_RPF(1),
 304         VSP1_ENTITY_ROUTE_RPF(2),
 305         VSP1_ENTITY_ROUTE_RPF(3),
 306         VSP1_ENTITY_ROUTE_RPF(4),
 307         VSP1_ENTITY_ROUTE(SRU),
 308         VSP1_ENTITY_ROUTE_UDS(0),
 309         VSP1_ENTITY_ROUTE_UDS(1),
 310         VSP1_ENTITY_ROUTE_UDS(2),
 311         VSP1_ENTITY_ROUTE_WPF(0),
 312         VSP1_ENTITY_ROUTE_WPF(1),
 313         VSP1_ENTITY_ROUTE_WPF(2),
 314         VSP1_ENTITY_ROUTE_WPF(3),
 315 };
 316
 317 int vsp1_entity_init(struct vsp1_device *vsp1, struct vsp1_entity *entity,
 318                      const char *name, unsigned int num_pads,
 319                      const struct v4l2_subdev_ops *ops)
 320 {
 321         struct v4l2_subdev *subdev;
 322         unsigned int i;
 323         int ret;
 324
 325         for (i = 0; i < ARRAY_SIZE(vsp1_routes); ++i) {
 326                 if (vsp1_routes[i].type == entity->type &&
 327                     vsp1_routes[i].index == entity->index) {
 328                         entity->route = &vsp1_routes[i];
 329                         break;
 330                 }
 331         }
 332
 333         if (i == ARRAY_SIZE(vsp1_routes))
 334                 return -EINVAL;
 335
 336         entity->vsp1 = vsp1;
 337         entity->source_pad = num_pads - 1;
 338
 339         /* Allocate and initialize pads. */
 340         entity->pads = devm_kzalloc(vsp1->dev, num_pads * sizeof(*entity->pads),
 341                                     GFP_KERNEL);
 342         if (entity->pads == NULL)
 343                 return -ENOMEM;
 344
 345         for (i = 0; i < num_pads - 1; ++i)
 346                 entity->pads[i].flags = MEDIA_PAD_FL_SINK;
 347
 348         entity->pads[num_pads - 1].flags = MEDIA_PAD_FL_SOURCE;
 349
 350         /* Initialize the media entity. */
 351         ret = media_entity_pads_init(&entity->subdev.entity, num_pads,
 352                                      entity->pads);
 353         if (ret < 0)
 354                 return ret;
 355
 356         /* Initialize the V4L2 subdev. */
 357         subdev = &entity->subdev;
 358         v4l2_subdev_init(subdev, ops);
 359
 360         subdev->entity.ops = &vsp1->media_ops;
 361         subdev->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
 362
 363         snprintf(subdev->name, sizeof(subdev->name), "%s %s",
 364                  dev_name(vsp1->dev), name);
 365
 366         vsp1_entity_init_cfg(subdev, NULL);
 367
 368         /* Allocate the pad configuration to store formats and selection
 369          * rectangles.
 370          */
 371         entity->config = v4l2_subdev_alloc_pad_config(&entity->subdev);
 372         if (entity->config == NULL) {
 373                 media_entity_cleanup(&entity->subdev.entity);
 374                 return -ENOMEM;
 375         }
 376
 377         return 0;
 378 }
 379
 380 void vsp1_entity_destroy(struct vsp1_entity *entity)
 381 {
 382         if (entity->ops && entity->ops->destroy)
 383                 entity->ops->destroy(entity);
 384         if (entity->subdev.ctrl_handler)
 385                 v4l2_ctrl_handler_free(entity->subdev.ctrl_handler);
 386         v4l2_subdev_free_pad_config(entity->config);
 387         media_entity_cleanup(&entity->subdev.entity);
 388 }