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         if (pipe->dl)
  31                 vsp1_dl_add(pipe->dl, reg, data);
  32         else
  33                 vsp1_write(e->vsp1, reg, data);
  34 }
  35
  36 bool vsp1_entity_is_streaming(struct vsp1_entity *entity)
  37 {
  38         unsigned long flags;
  39         bool streaming;
  40
  41         spin_lock_irqsave(&entity->lock, flags);
  42         streaming = entity->streaming;
  43         spin_unlock_irqrestore(&entity->lock, flags);
  44
  45         return streaming;
  46 }
  47
  48 int vsp1_entity_set_streaming(struct vsp1_entity *entity, bool streaming)
  49 {
  50         unsigned long flags;
  51         int ret;
  52
  53         spin_lock_irqsave(&entity->lock, flags);
  54         entity->streaming = streaming;
  55         spin_unlock_irqrestore(&entity->lock, flags);
  56
  57         if (!streaming)
  58                 return 0;
  59
  60         if (!entity->vsp1->info->uapi || !entity->subdev.ctrl_handler)
  61                 return 0;
  62
  63         ret = v4l2_ctrl_handler_setup(entity->subdev.ctrl_handler);
  64         if (ret < 0) {
  65                 spin_lock_irqsave(&entity->lock, flags);
  66                 entity->streaming = false;
  67                 spin_unlock_irqrestore(&entity->lock, flags);
  68         }
  69
  70         return ret;
  71 }
  72
  73 void vsp1_entity_route_setup(struct vsp1_entity *source)
  74 {
  75         struct vsp1_entity *sink;
  76
  77         if (source->route->reg == 0)
  78                 return;
  79
  80         sink = container_of(source->sink, struct vsp1_entity, subdev.entity);
  81         vsp1_mod_write(source, source->route->reg,
  82                        sink->route->inputs[source->sink_pad]);
  83 }
  84
  85 /* -----------------------------------------------------------------------------
  86  * V4L2 Subdevice Operations
  87  */
  88
  89 struct v4l2_mbus_framefmt *
  90 vsp1_entity_get_pad_format(struct vsp1_entity *entity,
  91                            struct v4l2_subdev_pad_config *cfg,
  92                            unsigned int pad, u32 which)
  93 {
  94         switch (which) {
  95         case V4L2_SUBDEV_FORMAT_TRY:
  96                 return v4l2_subdev_get_try_format(&entity->subdev, cfg, pad);
  97         case V4L2_SUBDEV_FORMAT_ACTIVE:
  98                 return &entity->formats[pad];
  99         default:
 100                 return NULL;
 101         }
 102 }
 103
 104 /*
 105  * vsp1_entity_init_formats - Initialize formats on all pads
 106  * @subdev: V4L2 subdevice
 107  * @cfg: V4L2 subdev pad configuration
 108  *
 109  * Initialize all pad formats with default values. If cfg is not NULL, try
 110  * formats are initialized on the file handle. Otherwise active formats are
 111  * initialized on the device.
 112  */
 113 void vsp1_entity_init_formats(struct v4l2_subdev *subdev,
 114                             struct v4l2_subdev_pad_config *cfg)
 115 {
 116         struct v4l2_subdev_format format;
 117         unsigned int pad;
 118
 119         for (pad = 0; pad < subdev->entity.num_pads - 1; ++pad) {
 120                 memset(&format, 0, sizeof(format));
 121
 122                 format.pad = pad;
 123                 format.which = cfg ? V4L2_SUBDEV_FORMAT_TRY
 124                              : V4L2_SUBDEV_FORMAT_ACTIVE;
 125
 126                 v4l2_subdev_call(subdev, pad, set_fmt, cfg, &format);
 127         }
 128 }
 129
 130 static int vsp1_entity_open(struct v4l2_subdev *subdev,
 131                             struct v4l2_subdev_fh *fh)
 132 {
 133         vsp1_entity_init_formats(subdev, fh->pad);
 134
 135         return 0;
 136 }
 137
 138 const struct v4l2_subdev_internal_ops vsp1_subdev_internal_ops = {
 139         .open = vsp1_entity_open,
 140 };
 141
 142 /* -----------------------------------------------------------------------------
 143  * Media Operations
 144  */
 145
 146 int vsp1_entity_link_setup(struct media_entity *entity,
 147                            const struct media_pad *local,
 148                            const struct media_pad *remote, u32 flags)
 149 {
 150         struct vsp1_entity *source;
 151
 152         if (!(local->flags & MEDIA_PAD_FL_SOURCE))
 153                 return 0;
 154
 155         source = container_of(local->entity, struct vsp1_entity, subdev.entity);
 156
 157         if (!source->route)
 158                 return 0;
 159
 160         if (flags & MEDIA_LNK_FL_ENABLED) {
 161                 if (source->sink)
 162                         return -EBUSY;
 163                 source->sink = remote->entity;
 164                 source->sink_pad = remote->index;
 165         } else {
 166                 source->sink = NULL;
 167                 source->sink_pad = 0;
 168         }
 169
 170         return 0;
 171 }
 172
 173 /* -----------------------------------------------------------------------------
 174  * Initialization
 175  */
 176
 177 static const struct vsp1_route vsp1_routes[] = {
 178         { VSP1_ENTITY_BRU, 0, VI6_DPR_BRU_ROUTE,
 179           { VI6_DPR_NODE_BRU_IN(0), VI6_DPR_NODE_BRU_IN(1),
 180             VI6_DPR_NODE_BRU_IN(2), VI6_DPR_NODE_BRU_IN(3),
 181             VI6_DPR_NODE_BRU_IN(4) } },
 182         { VSP1_ENTITY_HSI, 0, VI6_DPR_HSI_ROUTE, { VI6_DPR_NODE_HSI, } },
 183         { VSP1_ENTITY_HST, 0, VI6_DPR_HST_ROUTE, { VI6_DPR_NODE_HST, } },
 184         { VSP1_ENTITY_LIF, 0, 0, { VI6_DPR_NODE_LIF, } },
 185         { VSP1_ENTITY_LUT, 0, VI6_DPR_LUT_ROUTE, { VI6_DPR_NODE_LUT, } },
 186         { VSP1_ENTITY_RPF, 0, VI6_DPR_RPF_ROUTE(0), { VI6_DPR_NODE_RPF(0), } },
 187         { VSP1_ENTITY_RPF, 1, VI6_DPR_RPF_ROUTE(1), { VI6_DPR_NODE_RPF(1), } },
 188         { VSP1_ENTITY_RPF, 2, VI6_DPR_RPF_ROUTE(2), { VI6_DPR_NODE_RPF(2), } },
 189         { VSP1_ENTITY_RPF, 3, VI6_DPR_RPF_ROUTE(3), { VI6_DPR_NODE_RPF(3), } },
 190         { VSP1_ENTITY_RPF, 4, VI6_DPR_RPF_ROUTE(4), { VI6_DPR_NODE_RPF(4), } },
 191         { VSP1_ENTITY_SRU, 0, VI6_DPR_SRU_ROUTE, { VI6_DPR_NODE_SRU, } },
 192         { VSP1_ENTITY_UDS, 0, VI6_DPR_UDS_ROUTE(0), { VI6_DPR_NODE_UDS(0), } },
 193         { VSP1_ENTITY_UDS, 1, VI6_DPR_UDS_ROUTE(1), { VI6_DPR_NODE_UDS(1), } },
 194         { VSP1_ENTITY_UDS, 2, VI6_DPR_UDS_ROUTE(2), { VI6_DPR_NODE_UDS(2), } },
 195         { VSP1_ENTITY_WPF, 0, 0, { VI6_DPR_NODE_WPF(0), } },
 196         { VSP1_ENTITY_WPF, 1, 0, { VI6_DPR_NODE_WPF(1), } },
 197         { VSP1_ENTITY_WPF, 2, 0, { VI6_DPR_NODE_WPF(2), } },
 198         { VSP1_ENTITY_WPF, 3, 0, { VI6_DPR_NODE_WPF(3), } },
 199 };
 200
 201 int vsp1_entity_init(struct vsp1_device *vsp1, struct vsp1_entity *entity,
 202                      unsigned int num_pads)
 203 {
 204         unsigned int i;
 205
 206         for (i = 0; i < ARRAY_SIZE(vsp1_routes); ++i) {
 207                 if (vsp1_routes[i].type == entity->type &&
 208                     vsp1_routes[i].index == entity->index) {
 209                         entity->route = &vsp1_routes[i];
 210                         break;
 211                 }
 212         }
 213
 214         if (i == ARRAY_SIZE(vsp1_routes))
 215                 return -EINVAL;
 216
 217         spin_lock_init(&entity->lock);
 218
 219         entity->vsp1 = vsp1;
 220         entity->source_pad = num_pads - 1;
 221
 222         /* Allocate formats and pads. */
 223         entity->formats = devm_kzalloc(vsp1->dev,
 224                                        num_pads * sizeof(*entity->formats),
 225                                        GFP_KERNEL);
 226         if (entity->formats == NULL)
 227                 return -ENOMEM;
 228
 229         entity->pads = devm_kzalloc(vsp1->dev, num_pads * sizeof(*entity->pads),
 230                                     GFP_KERNEL);
 231         if (entity->pads == NULL)
 232                 return -ENOMEM;
 233
 234         /* Initialize pads. */
 235         for (i = 0; i < num_pads - 1; ++i)
 236                 entity->pads[i].flags = MEDIA_PAD_FL_SINK;
 237
 238         entity->pads[num_pads - 1].flags = MEDIA_PAD_FL_SOURCE;
 239
 240         /* Initialize the media entity. */
 241         return media_entity_pads_init(&entity->subdev.entity, num_pads,
 242                                  entity->pads);
 243 }
 244
 245 void vsp1_entity_destroy(struct vsp1_entity *entity)
 246 {
 247         if (entity->subdev.ctrl_handler)
 248                 v4l2_ctrl_handler_free(entity->subdev.ctrl_handler);
 249         media_entity_cleanup(&entity->subdev.entity);
 250 }