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  * Media Operations
 121  */
 122
 123 int vsp1_entity_link_setup(struct media_entity *entity,
 124                            const struct media_pad *local,
 125                            const struct media_pad *remote, u32 flags)
 126 {
 127         struct vsp1_entity *source;
 128
 129         if (!(local->flags & MEDIA_PAD_FL_SOURCE))
 130                 return 0;
 131
 132         source = container_of(local->entity, struct vsp1_entity, subdev.entity);
 133
 134         if (!source->route)
 135                 return 0;
 136
 137         if (flags & MEDIA_LNK_FL_ENABLED) {
 138                 if (source->sink)
 139                         return -EBUSY;
 140                 source->sink = remote->entity;
 141                 source->sink_pad = remote->index;
 142         } else {
 143                 source->sink = NULL;
 144                 source->sink_pad = 0;
 145         }
 146
 147         return 0;
 148 }
 149
 150 /* -----------------------------------------------------------------------------
 151  * Initialization
 152  */
 153
 154 static const struct vsp1_route vsp1_routes[] = {
 155         { VSP1_ENTITY_BRU, 0, VI6_DPR_BRU_ROUTE,
 156           { VI6_DPR_NODE_BRU_IN(0), VI6_DPR_NODE_BRU_IN(1),
 157             VI6_DPR_NODE_BRU_IN(2), VI6_DPR_NODE_BRU_IN(3),
 158             VI6_DPR_NODE_BRU_IN(4) } },
 159         { VSP1_ENTITY_HSI, 0, VI6_DPR_HSI_ROUTE, { VI6_DPR_NODE_HSI, } },
 160         { VSP1_ENTITY_HST, 0, VI6_DPR_HST_ROUTE, { VI6_DPR_NODE_HST, } },
 161         { VSP1_ENTITY_LIF, 0, 0, { VI6_DPR_NODE_LIF, } },
 162         { VSP1_ENTITY_LUT, 0, VI6_DPR_LUT_ROUTE, { VI6_DPR_NODE_LUT, } },
 163         { VSP1_ENTITY_RPF, 0, VI6_DPR_RPF_ROUTE(0), { VI6_DPR_NODE_RPF(0), } },
 164         { VSP1_ENTITY_RPF, 1, VI6_DPR_RPF_ROUTE(1), { VI6_DPR_NODE_RPF(1), } },
 165         { VSP1_ENTITY_RPF, 2, VI6_DPR_RPF_ROUTE(2), { VI6_DPR_NODE_RPF(2), } },
 166         { VSP1_ENTITY_RPF, 3, VI6_DPR_RPF_ROUTE(3), { VI6_DPR_NODE_RPF(3), } },
 167         { VSP1_ENTITY_RPF, 4, VI6_DPR_RPF_ROUTE(4), { VI6_DPR_NODE_RPF(4), } },
 168         { VSP1_ENTITY_SRU, 0, VI6_DPR_SRU_ROUTE, { VI6_DPR_NODE_SRU, } },
 169         { VSP1_ENTITY_UDS, 0, VI6_DPR_UDS_ROUTE(0), { VI6_DPR_NODE_UDS(0), } },
 170         { VSP1_ENTITY_UDS, 1, VI6_DPR_UDS_ROUTE(1), { VI6_DPR_NODE_UDS(1), } },
 171         { VSP1_ENTITY_UDS, 2, VI6_DPR_UDS_ROUTE(2), { VI6_DPR_NODE_UDS(2), } },
 172         { VSP1_ENTITY_WPF, 0, 0, { VI6_DPR_NODE_WPF(0), } },
 173         { VSP1_ENTITY_WPF, 1, 0, { VI6_DPR_NODE_WPF(1), } },
 174         { VSP1_ENTITY_WPF, 2, 0, { VI6_DPR_NODE_WPF(2), } },
 175         { VSP1_ENTITY_WPF, 3, 0, { VI6_DPR_NODE_WPF(3), } },
 176 };
 177
 178 int vsp1_entity_init(struct vsp1_device *vsp1, struct vsp1_entity *entity,
 179                      const char *name, unsigned int num_pads,
 180                      const struct v4l2_subdev_ops *ops)
 181 {
 182         struct v4l2_subdev *subdev;
 183         unsigned int i;
 184         int ret;
 185
 186         for (i = 0; i < ARRAY_SIZE(vsp1_routes); ++i) {
 187                 if (vsp1_routes[i].type == entity->type &&
 188                     vsp1_routes[i].index == entity->index) {
 189                         entity->route = &vsp1_routes[i];
 190                         break;
 191                 }
 192         }
 193
 194         if (i == ARRAY_SIZE(vsp1_routes))
 195                 return -EINVAL;
 196
 197         entity->vsp1 = vsp1;
 198         entity->source_pad = num_pads - 1;
 199
 200         /* Allocate and initialize pads. */
 201         entity->pads = devm_kzalloc(vsp1->dev, num_pads * sizeof(*entity->pads),
 202                                     GFP_KERNEL);
 203         if (entity->pads == NULL)
 204                 return -ENOMEM;
 205
 206         for (i = 0; i < num_pads - 1; ++i)
 207                 entity->pads[i].flags = MEDIA_PAD_FL_SINK;
 208
 209         entity->pads[num_pads - 1].flags = MEDIA_PAD_FL_SOURCE;
 210
 211         /* Initialize the media entity. */
 212         ret = media_entity_pads_init(&entity->subdev.entity, num_pads,
 213                                      entity->pads);
 214         if (ret < 0)
 215                 return ret;
 216
 217         /* Initialize the V4L2 subdev. */
 218         subdev = &entity->subdev;
 219         v4l2_subdev_init(subdev, ops);
 220
 221         subdev->entity.ops = &vsp1->media_ops;
 222         subdev->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
 223
 224         snprintf(subdev->name, sizeof(subdev->name), "%s %s",
 225                  dev_name(vsp1->dev), name);
 226
 227         vsp1_entity_init_cfg(subdev, NULL);
 228
 229         /* Allocate the pad configuration to store formats and selection
 230          * rectangles.
 231          */
 232         entity->config = v4l2_subdev_alloc_pad_config(&entity->subdev);
 233         if (entity->config == NULL) {
 234                 media_entity_cleanup(&entity->subdev.entity);
 235                 return -ENOMEM;
 236         }
 237
 238         return 0;
 239 }
 240
 241 void vsp1_entity_destroy(struct vsp1_entity *entity)
 242 {
 243         if (entity->ops && entity->ops->destroy)
 244                 entity->ops->destroy(entity);
 245         if (entity->subdev.ctrl_handler)
 246                 v4l2_ctrl_handler_free(entity->subdev.ctrl_handler);
 247         v4l2_subdev_free_pad_config(entity->config);
 248         media_entity_cleanup(&entity->subdev.entity);
 249 }