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_entity.h"
  23
  24 bool vsp1_entity_is_streaming(struct vsp1_entity *entity)
  25 {
  26         unsigned long flags;
  27         bool streaming;
  28
  29         spin_lock_irqsave(&entity->lock, flags);
  30         streaming = entity->streaming;
  31         spin_unlock_irqrestore(&entity->lock, flags);
  32
  33         return streaming;
  34 }
  35
  36 int vsp1_entity_set_streaming(struct vsp1_entity *entity, bool streaming)
  37 {
  38         unsigned long flags;
  39         int ret;
  40
  41         spin_lock_irqsave(&entity->lock, flags);
  42         entity->streaming = streaming;
  43         spin_unlock_irqrestore(&entity->lock, flags);
  44
  45         if (!streaming)
  46                 return 0;
  47
  48         if (!entity->vsp1->info->uapi || !entity->subdev.ctrl_handler)
  49                 return 0;
  50
  51         ret = v4l2_ctrl_handler_setup(entity->subdev.ctrl_handler);
  52         if (ret < 0) {
  53                 spin_lock_irqsave(&entity->lock, flags);
  54                 entity->streaming = false;
  55                 spin_unlock_irqrestore(&entity->lock, flags);
  56         }
  57
  58         return ret;
  59 }
  60
  61 void vsp1_entity_route_setup(struct vsp1_entity *source)
  62 {
  63         struct vsp1_entity *sink;
  64
  65         if (source->route->reg == 0)
  66                 return;
  67
  68         sink = container_of(source->sink, struct vsp1_entity, subdev.entity);
  69         vsp1_mod_write(source, source->route->reg,
  70                        sink->route->inputs[source->sink_pad]);
  71 }
  72
  73 /* -----------------------------------------------------------------------------
  74  * V4L2 Subdevice Operations
  75  */
  76
  77 struct v4l2_mbus_framefmt *
  78 vsp1_entity_get_pad_format(struct vsp1_entity *entity,
  79                            struct v4l2_subdev_pad_config *cfg,
  80                            unsigned int pad, u32 which)
  81 {
  82         switch (which) {
  83         case V4L2_SUBDEV_FORMAT_TRY:
  84                 return v4l2_subdev_get_try_format(&entity->subdev, cfg, pad);
  85         case V4L2_SUBDEV_FORMAT_ACTIVE:
  86                 return &entity->formats[pad];
  87         default:
  88                 return NULL;
  89         }
  90 }
  91
  92 /*
  93  * vsp1_entity_init_formats - Initialize formats on all pads
  94  * @subdev: V4L2 subdevice
  95  * @cfg: V4L2 subdev pad configuration
  96  *
  97  * Initialize all pad formats with default values. If cfg is not NULL, try
  98  * formats are initialized on the file handle. Otherwise active formats are
  99  * initialized on the device.
 100  */
 101 void vsp1_entity_init_formats(struct v4l2_subdev *subdev,
 102                             struct v4l2_subdev_pad_config *cfg)
 103 {
 104         struct v4l2_subdev_format format;
 105         unsigned int pad;
 106
 107         for (pad = 0; pad < subdev->entity.num_pads - 1; ++pad) {
 108                 memset(&format, 0, sizeof(format));
 109
 110                 format.pad = pad;
 111                 format.which = cfg ? V4L2_SUBDEV_FORMAT_TRY
 112                              : V4L2_SUBDEV_FORMAT_ACTIVE;
 113
 114                 v4l2_subdev_call(subdev, pad, set_fmt, cfg, &format);
 115         }
 116 }
 117
 118 static int vsp1_entity_open(struct v4l2_subdev *subdev,
 119                             struct v4l2_subdev_fh *fh)
 120 {
 121         vsp1_entity_init_formats(subdev, fh->pad);
 122
 123         return 0;
 124 }
 125
 126 const struct v4l2_subdev_internal_ops vsp1_subdev_internal_ops = {
 127         .open = vsp1_entity_open,
 128 };
 129
 130 /* -----------------------------------------------------------------------------
 131  * Media Operations
 132  */
 133
 134 int vsp1_entity_link_setup(struct media_entity *entity,
 135                            const struct media_pad *local,
 136                            const struct media_pad *remote, u32 flags)
 137 {
 138         struct vsp1_entity *source;
 139
 140         if (!(local->flags & MEDIA_PAD_FL_SOURCE))
 141                 return 0;
 142
 143         source = container_of(local->entity, struct vsp1_entity, subdev.entity);
 144
 145         if (!source->route)
 146                 return 0;
 147
 148         if (flags & MEDIA_LNK_FL_ENABLED) {
 149                 if (source->sink)
 150                         return -EBUSY;
 151                 source->sink = remote->entity;
 152                 source->sink_pad = remote->index;
 153         } else {
 154                 source->sink = NULL;
 155                 source->sink_pad = 0;
 156         }
 157
 158         return 0;
 159 }
 160
 161 /* -----------------------------------------------------------------------------
 162  * Initialization
 163  */
 164
 165 static const struct vsp1_route vsp1_routes[] = {
 166         { VSP1_ENTITY_BRU, 0, VI6_DPR_BRU_ROUTE,
 167           { VI6_DPR_NODE_BRU_IN(0), VI6_DPR_NODE_BRU_IN(1),
 168             VI6_DPR_NODE_BRU_IN(2), VI6_DPR_NODE_BRU_IN(3),
 169             VI6_DPR_NODE_BRU_IN(4) } },
 170         { VSP1_ENTITY_HSI, 0, VI6_DPR_HSI_ROUTE, { VI6_DPR_NODE_HSI, } },
 171         { VSP1_ENTITY_HST, 0, VI6_DPR_HST_ROUTE, { VI6_DPR_NODE_HST, } },
 172         { VSP1_ENTITY_LIF, 0, 0, { VI6_DPR_NODE_LIF, } },
 173         { VSP1_ENTITY_LUT, 0, VI6_DPR_LUT_ROUTE, { VI6_DPR_NODE_LUT, } },
 174         { VSP1_ENTITY_RPF, 0, VI6_DPR_RPF_ROUTE(0), { VI6_DPR_NODE_RPF(0), } },
 175         { VSP1_ENTITY_RPF, 1, VI6_DPR_RPF_ROUTE(1), { VI6_DPR_NODE_RPF(1), } },
 176         { VSP1_ENTITY_RPF, 2, VI6_DPR_RPF_ROUTE(2), { VI6_DPR_NODE_RPF(2), } },
 177         { VSP1_ENTITY_RPF, 3, VI6_DPR_RPF_ROUTE(3), { VI6_DPR_NODE_RPF(3), } },
 178         { VSP1_ENTITY_RPF, 4, VI6_DPR_RPF_ROUTE(4), { VI6_DPR_NODE_RPF(4), } },
 179         { VSP1_ENTITY_SRU, 0, VI6_DPR_SRU_ROUTE, { VI6_DPR_NODE_SRU, } },
 180         { VSP1_ENTITY_UDS, 0, VI6_DPR_UDS_ROUTE(0), { VI6_DPR_NODE_UDS(0), } },
 181         { VSP1_ENTITY_UDS, 1, VI6_DPR_UDS_ROUTE(1), { VI6_DPR_NODE_UDS(1), } },
 182         { VSP1_ENTITY_UDS, 2, VI6_DPR_UDS_ROUTE(2), { VI6_DPR_NODE_UDS(2), } },
 183         { VSP1_ENTITY_WPF, 0, 0, { VI6_DPR_NODE_WPF(0), } },
 184         { VSP1_ENTITY_WPF, 1, 0, { VI6_DPR_NODE_WPF(1), } },
 185         { VSP1_ENTITY_WPF, 2, 0, { VI6_DPR_NODE_WPF(2), } },
 186         { VSP1_ENTITY_WPF, 3, 0, { VI6_DPR_NODE_WPF(3), } },
 187 };
 188
 189 int vsp1_entity_init(struct vsp1_device *vsp1, struct vsp1_entity *entity,
 190                      unsigned int num_pads)
 191 {
 192         unsigned int i;
 193
 194         for (i = 0; i < ARRAY_SIZE(vsp1_routes); ++i) {
 195                 if (vsp1_routes[i].type == entity->type &&
 196                     vsp1_routes[i].index == entity->index) {
 197                         entity->route = &vsp1_routes[i];
 198                         break;
 199                 }
 200         }
 201
 202         if (i == ARRAY_SIZE(vsp1_routes))
 203                 return -EINVAL;
 204
 205         spin_lock_init(&entity->lock);
 206
 207         entity->vsp1 = vsp1;
 208         entity->source_pad = num_pads - 1;
 209
 210         /* Allocate formats and pads. */
 211         entity->formats = devm_kzalloc(vsp1->dev,
 212                                        num_pads * sizeof(*entity->formats),
 213                                        GFP_KERNEL);
 214         if (entity->formats == NULL)
 215                 return -ENOMEM;
 216
 217         entity->pads = devm_kzalloc(vsp1->dev, num_pads * sizeof(*entity->pads),
 218                                     GFP_KERNEL);
 219         if (entity->pads == NULL)
 220                 return -ENOMEM;
 221
 222         /* Initialize pads. */
 223         for (i = 0; i < num_pads - 1; ++i)
 224                 entity->pads[i].flags = MEDIA_PAD_FL_SINK;
 225
 226         entity->pads[num_pads - 1].flags = MEDIA_PAD_FL_SOURCE;
 227
 228         /* Initialize the media entity. */
 229         return media_entity_pads_init(&entity->subdev.entity, num_pads,
 230                                  entity->pads);
 231 }
 232
 233 void vsp1_entity_destroy(struct vsp1_entity *entity)
 234 {
 235         if (entity->subdev.ctrl_handler)
 236                 v4l2_ctrl_handler_free(entity->subdev.ctrl_handler);
 237         media_entity_cleanup(&entity->subdev.entity);
 238 }