kernel/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 #include "vsp1_video.h"
  24
  25 bool vsp1_entity_is_streaming(struct vsp1_entity *entity)
  26 {
  27         bool streaming;
  28
  29         mutex_lock(&entity->lock);
  30         streaming = entity->streaming;
  31         mutex_unlock(&entity->lock);
  32
  33         return streaming;
  34 }
  35
  36 int vsp1_entity_set_streaming(struct vsp1_entity *entity, bool streaming)
  37 {
  38         int ret;
  39
  40         mutex_lock(&entity->lock);
  41         entity->streaming = streaming;
  42         mutex_unlock(&entity->lock);
  43
  44         if (!streaming)
  45                 return 0;
  46
  47         if (!entity->subdev.ctrl_handler)
  48                 return 0;
  49
  50         ret = v4l2_ctrl_handler_setup(entity->subdev.ctrl_handler);
  51         if (ret < 0) {
  52                 mutex_lock(&entity->lock);
  53                 entity->streaming = false;
  54                 mutex_unlock(&entity->lock);
  55         }
  56
  57         return ret;
  58 }
  59
  60 /* -----------------------------------------------------------------------------
  61  * V4L2 Subdevice Operations
  62  */
  63
  64 struct v4l2_mbus_framefmt *
  65 vsp1_entity_get_pad_format(struct vsp1_entity *entity,
  66                            struct v4l2_subdev_pad_config *cfg,
  67                            unsigned int pad, u32 which)
  68 {
  69         switch (which) {
  70         case V4L2_SUBDEV_FORMAT_TRY:
  71                 return v4l2_subdev_get_try_format(&entity->subdev, cfg, pad);
  72         case V4L2_SUBDEV_FORMAT_ACTIVE:
  73                 return &entity->formats[pad];
  74         default:
  75                 return NULL;
  76         }
  77 }
  78
  79 /*
  80  * vsp1_entity_init_formats - Initialize formats on all pads
  81  * @subdev: V4L2 subdevice
  82  * @cfg: V4L2 subdev pad configuration
  83  *
  84  * Initialize all pad formats with default values. If cfg is not NULL, try
  85  * formats are initialized on the file handle. Otherwise active formats are
  86  * initialized on the device.
  87  */
  88 void vsp1_entity_init_formats(struct v4l2_subdev *subdev,
  89                             struct v4l2_subdev_pad_config *cfg)
  90 {
  91         struct v4l2_subdev_format format;
  92         unsigned int pad;
  93
  94         for (pad = 0; pad < subdev->entity.num_pads - 1; ++pad) {
  95                 memset(&format, 0, sizeof(format));
  96
  97                 format.pad = pad;
  98                 format.which = cfg ? V4L2_SUBDEV_FORMAT_TRY
  99                              : V4L2_SUBDEV_FORMAT_ACTIVE;
 100
 101                 v4l2_subdev_call(subdev, pad, set_fmt, cfg, &format);
 102         }
 103 }
 104
 105 static int vsp1_entity_open(struct v4l2_subdev *subdev,
 106                             struct v4l2_subdev_fh *fh)
 107 {
 108         vsp1_entity_init_formats(subdev, fh->pad);
 109
 110         return 0;
 111 }
 112
 113 const struct v4l2_subdev_internal_ops vsp1_subdev_internal_ops = {
 114         .open = vsp1_entity_open,
 115 };
 116
 117 /* -----------------------------------------------------------------------------
 118  * Media Operations
 119  */
 120
 121 static int vsp1_entity_link_setup(struct media_entity *entity,
 122                                   const struct media_pad *local,
 123                                   const struct media_pad *remote, u32 flags)
 124 {
 125         struct vsp1_entity *source;
 126
 127         if (!(local->flags & MEDIA_PAD_FL_SOURCE))
 128                 return 0;
 129
 130         source = container_of(local->entity, struct vsp1_entity, subdev.entity);
 131
 132         if (!source->route)
 133                 return 0;
 134
 135         if (flags & MEDIA_LNK_FL_ENABLED) {
 136                 if (source->sink)
 137                         return -EBUSY;
 138                 source->sink = remote->entity;
 139                 source->sink_pad = remote->index;
 140         } else {
 141                 source->sink = NULL;
 142                 source->sink_pad = 0;
 143         }
 144
 145         return 0;
 146 }
 147
 148 const struct media_entity_operations vsp1_media_ops = {
 149         .link_setup = vsp1_entity_link_setup,
 150         .link_validate = v4l2_subdev_link_validate,
 151 };
 152
 153 /* -----------------------------------------------------------------------------
 154  * Initialization
 155  */
 156
 157 static const struct vsp1_route vsp1_routes[] = {
 158         { VSP1_ENTITY_BRU, 0, VI6_DPR_BRU_ROUTE,
 159           { VI6_DPR_NODE_BRU_IN(0), VI6_DPR_NODE_BRU_IN(1),
 160             VI6_DPR_NODE_BRU_IN(2), VI6_DPR_NODE_BRU_IN(3), } },
 161         { VSP1_ENTITY_HSI, 0, VI6_DPR_HSI_ROUTE, { VI6_DPR_NODE_HSI, } },
 162         { VSP1_ENTITY_HST, 0, VI6_DPR_HST_ROUTE, { VI6_DPR_NODE_HST, } },
 163         { VSP1_ENTITY_LIF, 0, 0, { VI6_DPR_NODE_LIF, } },
 164         { VSP1_ENTITY_LUT, 0, VI6_DPR_LUT_ROUTE, { VI6_DPR_NODE_LUT, } },
 165         { VSP1_ENTITY_RPF, 0, VI6_DPR_RPF_ROUTE(0), { VI6_DPR_NODE_RPF(0), } },
 166         { VSP1_ENTITY_RPF, 1, VI6_DPR_RPF_ROUTE(1), { VI6_DPR_NODE_RPF(1), } },
 167         { VSP1_ENTITY_RPF, 2, VI6_DPR_RPF_ROUTE(2), { VI6_DPR_NODE_RPF(2), } },
 168         { VSP1_ENTITY_RPF, 3, VI6_DPR_RPF_ROUTE(3), { VI6_DPR_NODE_RPF(3), } },
 169         { VSP1_ENTITY_RPF, 4, VI6_DPR_RPF_ROUTE(4), { VI6_DPR_NODE_RPF(4), } },
 170         { VSP1_ENTITY_SRU, 0, VI6_DPR_SRU_ROUTE, { VI6_DPR_NODE_SRU, } },
 171         { VSP1_ENTITY_UDS, 0, VI6_DPR_UDS_ROUTE(0), { VI6_DPR_NODE_UDS(0), } },
 172         { VSP1_ENTITY_UDS, 1, VI6_DPR_UDS_ROUTE(1), { VI6_DPR_NODE_UDS(1), } },
 173         { VSP1_ENTITY_UDS, 2, VI6_DPR_UDS_ROUTE(2), { VI6_DPR_NODE_UDS(2), } },
 174         { VSP1_ENTITY_WPF, 0, 0, { VI6_DPR_NODE_WPF(0), } },
 175         { VSP1_ENTITY_WPF, 1, 0, { VI6_DPR_NODE_WPF(1), } },
 176         { VSP1_ENTITY_WPF, 2, 0, { VI6_DPR_NODE_WPF(2), } },
 177         { VSP1_ENTITY_WPF, 3, 0, { VI6_DPR_NODE_WPF(3), } },
 178 };
 179
 180 int vsp1_entity_init(struct vsp1_device *vsp1, struct vsp1_entity *entity,
 181                      unsigned int num_pads)
 182 {
 183         unsigned int i;
 184
 185         for (i = 0; i < ARRAY_SIZE(vsp1_routes); ++i) {
 186                 if (vsp1_routes[i].type == entity->type &&
 187                     vsp1_routes[i].index == entity->index) {
 188                         entity->route = &vsp1_routes[i];
 189                         break;
 190                 }
 191         }
 192
 193         if (i == ARRAY_SIZE(vsp1_routes))
 194                 return -EINVAL;
 195
 196         mutex_init(&entity->lock);
 197
 198         entity->vsp1 = vsp1;
 199         entity->source_pad = num_pads - 1;
 200
 201         /* Allocate formats and pads. */
 202         entity->formats = devm_kzalloc(vsp1->dev,
 203                                        num_pads * sizeof(*entity->formats),
 204                                        GFP_KERNEL);
 205         if (entity->formats == NULL)
 206                 return -ENOMEM;
 207
 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         /* Initialize pads. */
 214         for (i = 0; i < num_pads - 1; ++i)
 215                 entity->pads[i].flags = MEDIA_PAD_FL_SINK;
 216
 217         entity->pads[num_pads - 1].flags = MEDIA_PAD_FL_SOURCE;
 218
 219         /* Initialize the media entity. */
 220         return media_entity_init(&entity->subdev.entity, num_pads,
 221                                  entity->pads, 0);
 222 }
 223
 224 void vsp1_entity_destroy(struct vsp1_entity *entity)
 225 {
 226         if (entity->video)
 227                 vsp1_video_cleanup(entity->video);
 228         if (entity->subdev.ctrl_handler)
 229                 v4l2_ctrl_handler_free(entity->subdev.ctrl_handler);
 230         media_entity_cleanup(&entity->subdev.entity);
 231
 232         mutex_destroy(&entity->lock);
 233 }