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->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 /* -----------------------------------------------------------------------------
  62  * V4L2 Subdevice Operations
  63  */
  64
  65 struct v4l2_mbus_framefmt *
  66 vsp1_entity_get_pad_format(struct vsp1_entity *entity,
  67                            struct v4l2_subdev_pad_config *cfg,
  68                            unsigned int pad, u32 which)
  69 {
  70         switch (which) {
  71         case V4L2_SUBDEV_FORMAT_TRY:
  72                 return v4l2_subdev_get_try_format(&entity->subdev, cfg, pad);
  73         case V4L2_SUBDEV_FORMAT_ACTIVE:
  74                 return &entity->formats[pad];
  75         default:
  76                 return NULL;
  77         }
  78 }
  79
  80 /*
  81  * vsp1_entity_init_formats - Initialize formats on all pads
  82  * @subdev: V4L2 subdevice
  83  * @cfg: V4L2 subdev pad configuration
  84  *
  85  * Initialize all pad formats with default values. If cfg is not NULL, try
  86  * formats are initialized on the file handle. Otherwise active formats are
  87  * initialized on the device.
  88  */
  89 void vsp1_entity_init_formats(struct v4l2_subdev *subdev,
  90                             struct v4l2_subdev_pad_config *cfg)
  91 {
  92         struct v4l2_subdev_format format;
  93         unsigned int pad;
  94
  95         for (pad = 0; pad < subdev->entity.num_pads - 1; ++pad) {
  96                 memset(&format, 0, sizeof(format));
  97
  98                 format.pad = pad;
  99                 format.which = cfg ? V4L2_SUBDEV_FORMAT_TRY
 100                              : V4L2_SUBDEV_FORMAT_ACTIVE;
 101
 102                 v4l2_subdev_call(subdev, pad, set_fmt, cfg, &format);
 103         }
 104 }
 105
 106 static int vsp1_entity_open(struct v4l2_subdev *subdev,
 107                             struct v4l2_subdev_fh *fh)
 108 {
 109         vsp1_entity_init_formats(subdev, fh->pad);
 110
 111         return 0;
 112 }
 113
 114 const struct v4l2_subdev_internal_ops vsp1_subdev_internal_ops = {
 115         .open = vsp1_entity_open,
 116 };
 117
 118 /* -----------------------------------------------------------------------------
 119  * Media Operations
 120  */
 121
 122 static int vsp1_entity_link_setup(struct media_entity *entity,
 123                                   const struct media_pad *local,
 124                                   const struct media_pad *remote, u32 flags)
 125 {
 126         struct vsp1_entity *source;
 127
 128         if (!(local->flags & MEDIA_PAD_FL_SOURCE))
 129                 return 0;
 130
 131         source = container_of(local->entity, struct vsp1_entity, subdev.entity);
 132
 133         if (!source->route)
 134                 return 0;
 135
 136         if (flags & MEDIA_LNK_FL_ENABLED) {
 137                 if (source->sink)
 138                         return -EBUSY;
 139                 source->sink = remote->entity;
 140                 source->sink_pad = remote->index;
 141         } else {
 142                 source->sink = NULL;
 143                 source->sink_pad = 0;
 144         }
 145
 146         return 0;
 147 }
 148
 149 const struct media_entity_operations vsp1_media_ops = {
 150         .link_setup = vsp1_entity_link_setup,
 151         .link_validate = v4l2_subdev_link_validate,
 152 };
 153
 154 /* -----------------------------------------------------------------------------
 155  * Initialization
 156  */
 157
 158 static const struct vsp1_route vsp1_routes[] = {
 159         { VSP1_ENTITY_BRU, 0, VI6_DPR_BRU_ROUTE,
 160           { VI6_DPR_NODE_BRU_IN(0), VI6_DPR_NODE_BRU_IN(1),
 161             VI6_DPR_NODE_BRU_IN(2), VI6_DPR_NODE_BRU_IN(3), } },
 162         { VSP1_ENTITY_HSI, 0, VI6_DPR_HSI_ROUTE, { VI6_DPR_NODE_HSI, } },
 163         { VSP1_ENTITY_HST, 0, VI6_DPR_HST_ROUTE, { VI6_DPR_NODE_HST, } },
 164         { VSP1_ENTITY_LIF, 0, 0, { VI6_DPR_NODE_LIF, } },
 165         { VSP1_ENTITY_LUT, 0, VI6_DPR_LUT_ROUTE, { VI6_DPR_NODE_LUT, } },
 166         { VSP1_ENTITY_RPF, 0, VI6_DPR_RPF_ROUTE(0), { VI6_DPR_NODE_RPF(0), } },
 167         { VSP1_ENTITY_RPF, 1, VI6_DPR_RPF_ROUTE(1), { VI6_DPR_NODE_RPF(1), } },
 168         { VSP1_ENTITY_RPF, 2, VI6_DPR_RPF_ROUTE(2), { VI6_DPR_NODE_RPF(2), } },
 169         { VSP1_ENTITY_RPF, 3, VI6_DPR_RPF_ROUTE(3), { VI6_DPR_NODE_RPF(3), } },
 170         { VSP1_ENTITY_RPF, 4, VI6_DPR_RPF_ROUTE(4), { VI6_DPR_NODE_RPF(4), } },
 171         { VSP1_ENTITY_SRU, 0, VI6_DPR_SRU_ROUTE, { VI6_DPR_NODE_SRU, } },
 172         { VSP1_ENTITY_UDS, 0, VI6_DPR_UDS_ROUTE(0), { VI6_DPR_NODE_UDS(0), } },
 173         { VSP1_ENTITY_UDS, 1, VI6_DPR_UDS_ROUTE(1), { VI6_DPR_NODE_UDS(1), } },
 174         { VSP1_ENTITY_UDS, 2, VI6_DPR_UDS_ROUTE(2), { VI6_DPR_NODE_UDS(2), } },
 175         { VSP1_ENTITY_WPF, 0, 0, { VI6_DPR_NODE_WPF(0), } },
 176         { VSP1_ENTITY_WPF, 1, 0, { VI6_DPR_NODE_WPF(1), } },
 177         { VSP1_ENTITY_WPF, 2, 0, { VI6_DPR_NODE_WPF(2), } },
 178         { VSP1_ENTITY_WPF, 3, 0, { VI6_DPR_NODE_WPF(3), } },
 179 };
 180
 181 int vsp1_entity_init(struct vsp1_device *vsp1, struct vsp1_entity *entity,
 182                      unsigned int num_pads)
 183 {
 184         unsigned int i;
 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         spin_lock_init(&entity->lock);
 198
 199         entity->vsp1 = vsp1;
 200         entity->source_pad = num_pads - 1;
 201
 202         /* Allocate formats and pads. */
 203         entity->formats = devm_kzalloc(vsp1->dev,
 204                                        num_pads * sizeof(*entity->formats),
 205                                        GFP_KERNEL);
 206         if (entity->formats == NULL)
 207                 return -ENOMEM;
 208
 209         entity->pads = devm_kzalloc(vsp1->dev, num_pads * sizeof(*entity->pads),
 210                                     GFP_KERNEL);
 211         if (entity->pads == NULL)
 212                 return -ENOMEM;
 213
 214         /* Initialize pads. */
 215         for (i = 0; i < num_pads - 1; ++i)
 216                 entity->pads[i].flags = MEDIA_PAD_FL_SINK;
 217
 218         entity->pads[num_pads - 1].flags = MEDIA_PAD_FL_SOURCE;
 219
 220         /* Initialize the media entity. */
 221         return media_entity_pads_init(&entity->subdev.entity, num_pads,
 222                                  entity->pads);
 223 }
 224
 225 void vsp1_entity_destroy(struct vsp1_entity *entity)
 226 {
 227         if (entity->subdev.ctrl_handler)
 228                 v4l2_ctrl_handler_free(entity->subdev.ctrl_handler);
 229         media_entity_cleanup(&entity->subdev.entity);
 230 }