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 #include "vsp1_pipe.h"
  25
  26 void vsp1_mod_write(struct vsp1_entity *e, u32 reg, u32 data)
  27 {
  28         struct vsp1_pipeline *pipe = to_vsp1_pipeline(&e->subdev.entity);
  29
  30         vsp1_dl_list_write(pipe->dl, reg, data);
  31 }
  32
  33 void vsp1_entity_route_setup(struct vsp1_entity *source)
  34 {
  35         struct vsp1_entity *sink;
  36
  37         if (source->route->reg == 0)
  38                 return;
  39
  40         sink = container_of(source->sink, struct vsp1_entity, subdev.entity);
  41         vsp1_mod_write(source, source->route->reg,
  42                        sink->route->inputs[source->sink_pad]);
  43 }
  44
  45 /* -----------------------------------------------------------------------------
  46  * V4L2 Subdevice Operations
  47  */
  48
  49 /**
  50  * vsp1_entity_get_pad_config - Get the pad configuration for an entity
  51  * @entity: the entity
  52  * @cfg: the TRY pad configuration
  53  * @which: configuration selector (ACTIVE or TRY)
  54  *
  55  * Return the pad configuration requested by the which argument. The TRY
  56  * configuration is passed explicitly to the function through the cfg argument
  57  * and simply returned when requested. The ACTIVE configuration comes from the
  58  * entity structure.
  59  */
  60 struct v4l2_subdev_pad_config *
  61 vsp1_entity_get_pad_config(struct vsp1_entity *entity,
  62                            struct v4l2_subdev_pad_config *cfg,
  63                            enum v4l2_subdev_format_whence which)
  64 {
  65         switch (which) {
  66         case V4L2_SUBDEV_FORMAT_ACTIVE:
  67                 return entity->config;
  68         case V4L2_SUBDEV_FORMAT_TRY:
  69         default:
  70                 return cfg;
  71         }
  72 }
  73
  74 /**
  75  * vsp1_entity_get_pad_format - Get a pad format from storage for an entity
  76  * @entity: the entity
  77  * @cfg: the configuration storage
  78  * @pad: the pad number
  79  *
  80  * Return the format stored in the given configuration for an entity's pad. The
  81  * configuration can be an ACTIVE or TRY configuration.
  82  */
  83 struct v4l2_mbus_framefmt *
  84 vsp1_entity_get_pad_format(struct vsp1_entity *entity,
  85                            struct v4l2_subdev_pad_config *cfg,
  86                            unsigned int pad)
  87 {
  88         return v4l2_subdev_get_try_format(&entity->subdev, cfg, pad);
  89 }
  90
  91 struct v4l2_rect *
  92 vsp1_entity_get_pad_compose(struct vsp1_entity *entity,
  93                             struct v4l2_subdev_pad_config *cfg,
  94                             unsigned int pad)
  95 {
  96         return v4l2_subdev_get_try_compose(&entity->subdev, cfg, pad);
  97 }
  98
  99 /*
 100  * vsp1_entity_init_cfg - Initialize formats on all pads
 101  * @subdev: V4L2 subdevice
 102  * @cfg: V4L2 subdev pad configuration
 103  *
 104  * Initialize all pad formats with default values in the given pad config. This
 105  * function can be used as a handler for the subdev pad::init_cfg operation.
 106  */
 107 int vsp1_entity_init_cfg(struct v4l2_subdev *subdev,
 108                          struct v4l2_subdev_pad_config *cfg)
 109 {
 110         struct v4l2_subdev_format format;
 111         unsigned int pad;
 112
 113         for (pad = 0; pad < subdev->entity.num_pads - 1; ++pad) {
 114                 memset(&format, 0, sizeof(format));
 115
 116                 format.pad = pad;
 117                 format.which = cfg ? V4L2_SUBDEV_FORMAT_TRY
 118                              : V4L2_SUBDEV_FORMAT_ACTIVE;
 119
 120                 v4l2_subdev_call(subdev, pad, set_fmt, cfg, &format);
 121         }
 122
 123         return 0;
 124 }
 125
 126 /* -----------------------------------------------------------------------------
 127  * Media Operations
 128  */
 129
 130 int vsp1_entity_link_setup(struct media_entity *entity,
 131                            const struct media_pad *local,
 132                            const struct media_pad *remote, u32 flags)
 133 {
 134         struct vsp1_entity *source;
 135
 136         if (!(local->flags & MEDIA_PAD_FL_SOURCE))
 137                 return 0;
 138
 139         source = container_of(local->entity, struct vsp1_entity, subdev.entity);
 140
 141         if (!source->route)
 142                 return 0;
 143
 144         if (flags & MEDIA_LNK_FL_ENABLED) {
 145                 if (source->sink)
 146                         return -EBUSY;
 147                 source->sink = remote->entity;
 148                 source->sink_pad = remote->index;
 149         } else {
 150                 source->sink = NULL;
 151                 source->sink_pad = 0;
 152         }
 153
 154         return 0;
 155 }
 156
 157 /* -----------------------------------------------------------------------------
 158  * Initialization
 159  */
 160
 161 static const struct vsp1_route vsp1_routes[] = {
 162         { VSP1_ENTITY_BRU, 0, VI6_DPR_BRU_ROUTE,
 163           { VI6_DPR_NODE_BRU_IN(0), VI6_DPR_NODE_BRU_IN(1),
 164             VI6_DPR_NODE_BRU_IN(2), VI6_DPR_NODE_BRU_IN(3),
 165             VI6_DPR_NODE_BRU_IN(4) } },
 166         { VSP1_ENTITY_HSI, 0, VI6_DPR_HSI_ROUTE, { VI6_DPR_NODE_HSI, } },
 167         { VSP1_ENTITY_HST, 0, VI6_DPR_HST_ROUTE, { VI6_DPR_NODE_HST, } },
 168         { VSP1_ENTITY_LIF, 0, 0, { VI6_DPR_NODE_LIF, } },
 169         { VSP1_ENTITY_LUT, 0, VI6_DPR_LUT_ROUTE, { VI6_DPR_NODE_LUT, } },
 170         { VSP1_ENTITY_RPF, 0, VI6_DPR_RPF_ROUTE(0), { VI6_DPR_NODE_RPF(0), } },
 171         { VSP1_ENTITY_RPF, 1, VI6_DPR_RPF_ROUTE(1), { VI6_DPR_NODE_RPF(1), } },
 172         { VSP1_ENTITY_RPF, 2, VI6_DPR_RPF_ROUTE(2), { VI6_DPR_NODE_RPF(2), } },
 173         { VSP1_ENTITY_RPF, 3, VI6_DPR_RPF_ROUTE(3), { VI6_DPR_NODE_RPF(3), } },
 174         { VSP1_ENTITY_RPF, 4, VI6_DPR_RPF_ROUTE(4), { VI6_DPR_NODE_RPF(4), } },
 175         { VSP1_ENTITY_SRU, 0, VI6_DPR_SRU_ROUTE, { VI6_DPR_NODE_SRU, } },
 176         { VSP1_ENTITY_UDS, 0, VI6_DPR_UDS_ROUTE(0), { VI6_DPR_NODE_UDS(0), } },
 177         { VSP1_ENTITY_UDS, 1, VI6_DPR_UDS_ROUTE(1), { VI6_DPR_NODE_UDS(1), } },
 178         { VSP1_ENTITY_UDS, 2, VI6_DPR_UDS_ROUTE(2), { VI6_DPR_NODE_UDS(2), } },
 179         { VSP1_ENTITY_WPF, 0, 0, { VI6_DPR_NODE_WPF(0), } },
 180         { VSP1_ENTITY_WPF, 1, 0, { VI6_DPR_NODE_WPF(1), } },
 181         { VSP1_ENTITY_WPF, 2, 0, { VI6_DPR_NODE_WPF(2), } },
 182         { VSP1_ENTITY_WPF, 3, 0, { VI6_DPR_NODE_WPF(3), } },
 183 };
 184
 185 int vsp1_entity_init(struct vsp1_device *vsp1, struct vsp1_entity *entity,
 186                      const char *name, unsigned int num_pads,
 187                      const struct v4l2_subdev_ops *ops)
 188 {
 189         struct v4l2_subdev *subdev;
 190         unsigned int i;
 191         int ret;
 192
 193         for (i = 0; i < ARRAY_SIZE(vsp1_routes); ++i) {
 194                 if (vsp1_routes[i].type == entity->type &&
 195                     vsp1_routes[i].index == entity->index) {
 196                         entity->route = &vsp1_routes[i];
 197                         break;
 198                 }
 199         }
 200
 201         if (i == ARRAY_SIZE(vsp1_routes))
 202                 return -EINVAL;
 203
 204         entity->vsp1 = vsp1;
 205         entity->source_pad = num_pads - 1;
 206
 207         /* Allocate and initialize pads. */
 208         entity->pads = devm_kzalloc(vsp1->dev, num_pads * sizeof(*entity->pads),
 209                                     GFP_KERNEL);
 210         if (entity->pads == NULL)
 211                 return -ENOMEM;
 212
 213         for (i = 0; i < num_pads - 1; ++i)
 214                 entity->pads[i].flags = MEDIA_PAD_FL_SINK;
 215
 216         entity->pads[num_pads - 1].flags = MEDIA_PAD_FL_SOURCE;
 217
 218         /* Initialize the media entity. */
 219         ret = media_entity_pads_init(&entity->subdev.entity, num_pads,
 220                                      entity->pads);
 221         if (ret < 0)
 222                 return ret;
 223
 224         /* Initialize the V4L2 subdev. */
 225         subdev = &entity->subdev;
 226         v4l2_subdev_init(subdev, ops);
 227
 228         subdev->entity.ops = &vsp1->media_ops;
 229         subdev->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
 230
 231         snprintf(subdev->name, sizeof(subdev->name), "%s %s",
 232                  dev_name(vsp1->dev), name);
 233
 234         vsp1_entity_init_cfg(subdev, NULL);
 235
 236         /* Allocate the pad configuration to store formats and selection
 237          * rectangles.
 238          */
 239         entity->config = v4l2_subdev_alloc_pad_config(&entity->subdev);
 240         if (entity->config == NULL) {
 241                 media_entity_cleanup(&entity->subdev.entity);
 242                 return -ENOMEM;
 243         }
 244
 245         return 0;
 246 }
 247
 248 void vsp1_entity_destroy(struct vsp1_entity *entity)
 249 {
 250         if (entity->ops && entity->ops->destroy)
 251                 entity->ops->destroy(entity);
 252         if (entity->subdev.ctrl_handler)
 253                 v4l2_ctrl_handler_free(entity->subdev.ctrl_handler);
 254         v4l2_subdev_free_pad_config(entity->config);
 255         media_entity_cleanup(&entity->subdev.entity);
 256 }