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 struct v4l2_mbus_framefmt *
  50 vsp1_entity_get_pad_format(struct vsp1_entity *entity,
  51                            struct v4l2_subdev_pad_config *cfg,
  52                            unsigned int pad, u32 which)
  53 {
  54         switch (which) {
  55         case V4L2_SUBDEV_FORMAT_TRY:
  56                 return v4l2_subdev_get_try_format(&entity->subdev, cfg, pad);
  57         case V4L2_SUBDEV_FORMAT_ACTIVE:
  58                 return &entity->formats[pad];
  59         default:
  60                 return NULL;
  61         }
  62 }
  63
  64 /*
  65  * vsp1_entity_init_cfg - Initialize formats on all pads
  66  * @subdev: V4L2 subdevice
  67  * @cfg: V4L2 subdev pad configuration
  68  *
  69  * Initialize all pad formats with default values in the given pad config. This
  70  * function can be used as a handler for the subdev pad::init_cfg operation.
  71  */
  72 int vsp1_entity_init_cfg(struct v4l2_subdev *subdev,
  73                          struct v4l2_subdev_pad_config *cfg)
  74 {
  75         struct v4l2_subdev_format format;
  76         unsigned int pad;
  77
  78         for (pad = 0; pad < subdev->entity.num_pads - 1; ++pad) {
  79                 memset(&format, 0, sizeof(format));
  80
  81                 format.pad = pad;
  82                 format.which = cfg ? V4L2_SUBDEV_FORMAT_TRY
  83                              : V4L2_SUBDEV_FORMAT_ACTIVE;
  84
  85                 v4l2_subdev_call(subdev, pad, set_fmt, cfg, &format);
  86         }
  87
  88         return 0;
  89 }
  90
  91 /* -----------------------------------------------------------------------------
  92  * Media Operations
  93  */
  94
  95 int vsp1_entity_link_setup(struct media_entity *entity,
  96                            const struct media_pad *local,
  97                            const struct media_pad *remote, u32 flags)
  98 {
  99         struct vsp1_entity *source;
 100
 101         if (!(local->flags & MEDIA_PAD_FL_SOURCE))
 102                 return 0;
 103
 104         source = container_of(local->entity, struct vsp1_entity, subdev.entity);
 105
 106         if (!source->route)
 107                 return 0;
 108
 109         if (flags & MEDIA_LNK_FL_ENABLED) {
 110                 if (source->sink)
 111                         return -EBUSY;
 112                 source->sink = remote->entity;
 113                 source->sink_pad = remote->index;
 114         } else {
 115                 source->sink = NULL;
 116                 source->sink_pad = 0;
 117         }
 118
 119         return 0;
 120 }
 121
 122 /* -----------------------------------------------------------------------------
 123  * Initialization
 124  */
 125
 126 static const struct vsp1_route vsp1_routes[] = {
 127         { VSP1_ENTITY_BRU, 0, VI6_DPR_BRU_ROUTE,
 128           { VI6_DPR_NODE_BRU_IN(0), VI6_DPR_NODE_BRU_IN(1),
 129             VI6_DPR_NODE_BRU_IN(2), VI6_DPR_NODE_BRU_IN(3),
 130             VI6_DPR_NODE_BRU_IN(4) } },
 131         { VSP1_ENTITY_HSI, 0, VI6_DPR_HSI_ROUTE, { VI6_DPR_NODE_HSI, } },
 132         { VSP1_ENTITY_HST, 0, VI6_DPR_HST_ROUTE, { VI6_DPR_NODE_HST, } },
 133         { VSP1_ENTITY_LIF, 0, 0, { VI6_DPR_NODE_LIF, } },
 134         { VSP1_ENTITY_LUT, 0, VI6_DPR_LUT_ROUTE, { VI6_DPR_NODE_LUT, } },
 135         { VSP1_ENTITY_RPF, 0, VI6_DPR_RPF_ROUTE(0), { VI6_DPR_NODE_RPF(0), } },
 136         { VSP1_ENTITY_RPF, 1, VI6_DPR_RPF_ROUTE(1), { VI6_DPR_NODE_RPF(1), } },
 137         { VSP1_ENTITY_RPF, 2, VI6_DPR_RPF_ROUTE(2), { VI6_DPR_NODE_RPF(2), } },
 138         { VSP1_ENTITY_RPF, 3, VI6_DPR_RPF_ROUTE(3), { VI6_DPR_NODE_RPF(3), } },
 139         { VSP1_ENTITY_RPF, 4, VI6_DPR_RPF_ROUTE(4), { VI6_DPR_NODE_RPF(4), } },
 140         { VSP1_ENTITY_SRU, 0, VI6_DPR_SRU_ROUTE, { VI6_DPR_NODE_SRU, } },
 141         { VSP1_ENTITY_UDS, 0, VI6_DPR_UDS_ROUTE(0), { VI6_DPR_NODE_UDS(0), } },
 142         { VSP1_ENTITY_UDS, 1, VI6_DPR_UDS_ROUTE(1), { VI6_DPR_NODE_UDS(1), } },
 143         { VSP1_ENTITY_UDS, 2, VI6_DPR_UDS_ROUTE(2), { VI6_DPR_NODE_UDS(2), } },
 144         { VSP1_ENTITY_WPF, 0, 0, { VI6_DPR_NODE_WPF(0), } },
 145         { VSP1_ENTITY_WPF, 1, 0, { VI6_DPR_NODE_WPF(1), } },
 146         { VSP1_ENTITY_WPF, 2, 0, { VI6_DPR_NODE_WPF(2), } },
 147         { VSP1_ENTITY_WPF, 3, 0, { VI6_DPR_NODE_WPF(3), } },
 148 };
 149
 150 int vsp1_entity_init(struct vsp1_device *vsp1, struct vsp1_entity *entity,
 151                      const char *name, unsigned int num_pads,
 152                      const struct v4l2_subdev_ops *ops)
 153 {
 154         struct v4l2_subdev *subdev;
 155         unsigned int i;
 156         int ret;
 157
 158         for (i = 0; i < ARRAY_SIZE(vsp1_routes); ++i) {
 159                 if (vsp1_routes[i].type == entity->type &&
 160                     vsp1_routes[i].index == entity->index) {
 161                         entity->route = &vsp1_routes[i];
 162                         break;
 163                 }
 164         }
 165
 166         if (i == ARRAY_SIZE(vsp1_routes))
 167                 return -EINVAL;
 168
 169         entity->vsp1 = vsp1;
 170         entity->source_pad = num_pads - 1;
 171
 172         /* Allocate formats and pads. */
 173         entity->formats = devm_kzalloc(vsp1->dev,
 174                                        num_pads * sizeof(*entity->formats),
 175                                        GFP_KERNEL);
 176         if (entity->formats == NULL)
 177                 return -ENOMEM;
 178
 179         entity->pads = devm_kzalloc(vsp1->dev, num_pads * sizeof(*entity->pads),
 180                                     GFP_KERNEL);
 181         if (entity->pads == NULL)
 182                 return -ENOMEM;
 183
 184         /* Initialize pads. */
 185         for (i = 0; i < num_pads - 1; ++i)
 186                 entity->pads[i].flags = MEDIA_PAD_FL_SINK;
 187
 188         entity->pads[num_pads - 1].flags = MEDIA_PAD_FL_SOURCE;
 189
 190         /* Initialize the media entity. */
 191         ret = media_entity_pads_init(&entity->subdev.entity, num_pads,
 192                                      entity->pads);
 193         if (ret < 0)
 194                 return ret;
 195
 196         /* Initialize the V4L2 subdev. */
 197         subdev = &entity->subdev;
 198         v4l2_subdev_init(subdev, ops);
 199
 200         subdev->entity.ops = &vsp1->media_ops;
 201         subdev->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
 202
 203         snprintf(subdev->name, sizeof(subdev->name), "%s %s",
 204                  dev_name(vsp1->dev), name);
 205
 206         vsp1_entity_init_cfg(subdev, NULL);
 207
 208         return 0;
 209 }
 210
 211 void vsp1_entity_destroy(struct vsp1_entity *entity)
 212 {
 213         if (entity->ops && entity->ops->destroy)
 214                 entity->ops->destroy(entity);
 215         if (entity->subdev.ctrl_handler)
 216                 v4l2_ctrl_handler_free(entity->subdev.ctrl_handler);
 217         media_entity_cleanup(&entity->subdev.entity);
 218 }