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         unsigned long flags;
  28         bool streaming;
  29
  30         spin_lock_irqsave(&entity->lock, flags);
  31         streaming = entity->streaming;
  32         spin_unlock_irqrestore(&entity->lock, flags);
  33
  34         return streaming;
  35 }
  36
  37 int vsp1_entity_set_streaming(struct vsp1_entity *entity, bool streaming)
  38 {
  39         unsigned long flags;
  40         int ret;
  41
  42         spin_lock_irqsave(&entity->lock, flags);
  43         entity->streaming = streaming;
  44         spin_unlock_irqrestore(&entity->lock, flags);
  45
  46         if (!streaming)
  47                 return 0;
  48
  49         if (!entity->subdev.ctrl_handler)
  50                 return 0;
  51
  52         ret = v4l2_ctrl_handler_setup(entity->subdev.ctrl_handler);
  53         if (ret < 0) {
  54                 spin_lock_irqsave(&entity->lock, flags);
  55                 entity->streaming = false;
  56                 spin_unlock_irqrestore(&entity->lock, flags);
  57         }
  58
  59         return ret;
  60 }
  61
  62 /* -----------------------------------------------------------------------------
  63  * V4L2 Subdevice Operations
  64  */
  65
  66 struct v4l2_mbus_framefmt *
  67 vsp1_entity_get_pad_format(struct vsp1_entity *entity,
  68                            struct v4l2_subdev_pad_config *cfg,
  69                            unsigned int pad, u32 which)
  70 {
  71         switch (which) {
  72         case V4L2_SUBDEV_FORMAT_TRY:
  73                 return v4l2_subdev_get_try_format(&entity->subdev, cfg, pad);
  74         case V4L2_SUBDEV_FORMAT_ACTIVE:
  75                 return &entity->formats[pad];
  76         default:
  77                 return NULL;
  78         }
  79 }
  80
  81 /*
  82  * vsp1_entity_init_formats - Initialize formats on all pads
  83  * @subdev: V4L2 subdevice
  84  * @cfg: V4L2 subdev pad configuration
  85  *
  86  * Initialize all pad formats with default values. If cfg is not NULL, try
  87  * formats are initialized on the file handle. Otherwise active formats are
  88  * initialized on the device.
  89  */
  90 void vsp1_entity_init_formats(struct v4l2_subdev *subdev,
  91                             struct v4l2_subdev_pad_config *cfg)
  92 {
  93         struct v4l2_subdev_format format;
  94         unsigned int pad;
  95
  96         for (pad = 0; pad < subdev->entity.num_pads - 1; ++pad) {
  97                 memset(&format, 0, sizeof(format));
  98
  99                 format.pad = pad;
 100                 format.which = cfg ? V4L2_SUBDEV_FORMAT_TRY
 101                              : V4L2_SUBDEV_FORMAT_ACTIVE;
 102
 103                 v4l2_subdev_call(subdev, pad, set_fmt, cfg, &format);
 104         }
 105 }
 106
 107 static int vsp1_entity_open(struct v4l2_subdev *subdev,
 108                             struct v4l2_subdev_fh *fh)
 109 {
 110         vsp1_entity_init_formats(subdev, fh->pad);
 111
 112         return 0;
 113 }
 114
 115 const struct v4l2_subdev_internal_ops vsp1_subdev_internal_ops = {
 116         .open = vsp1_entity_open,
 117 };
 118
 119 /* -----------------------------------------------------------------------------
 120  * Media Operations
 121  */
 122
 123 static int vsp1_entity_link_setup(struct media_entity *entity,
 124                                   const struct media_pad *local,
 125                                   const struct media_pad *remote, u32 flags)
 126 {
 127         struct vsp1_entity *source;
 128
 129         if (!(local->flags & MEDIA_PAD_FL_SOURCE))
 130                 return 0;
 131
 132         source = container_of(local->entity, struct vsp1_entity, subdev.entity);
 133
 134         if (!source->route)
 135                 return 0;
 136
 137         if (flags & MEDIA_LNK_FL_ENABLED) {
 138                 if (source->sink)
 139                         return -EBUSY;
 140                 source->sink = remote->entity;
 141                 source->sink_pad = remote->index;
 142         } else {
 143                 source->sink = NULL;
 144                 source->sink_pad = 0;
 145         }
 146
 147         return 0;
 148 }
 149
 150 const struct media_entity_operations vsp1_media_ops = {
 151         .link_setup = vsp1_entity_link_setup,
 152         .link_validate = v4l2_subdev_link_validate,
 153 };
 154
 155 /* -----------------------------------------------------------------------------
 156  * Initialization
 157  */
 158
 159 static const struct vsp1_route vsp1_routes[] = {
 160         { VSP1_ENTITY_BRU, 0, VI6_DPR_BRU_ROUTE,
 161           { VI6_DPR_NODE_BRU_IN(0), VI6_DPR_NODE_BRU_IN(1),
 162             VI6_DPR_NODE_BRU_IN(2), VI6_DPR_NODE_BRU_IN(3), } },
 163         { VSP1_ENTITY_HSI, 0, VI6_DPR_HSI_ROUTE, { VI6_DPR_NODE_HSI, } },
 164         { VSP1_ENTITY_HST, 0, VI6_DPR_HST_ROUTE, { VI6_DPR_NODE_HST, } },
 165         { VSP1_ENTITY_LIF, 0, 0, { VI6_DPR_NODE_LIF, } },
 166         { VSP1_ENTITY_LUT, 0, VI6_DPR_LUT_ROUTE, { VI6_DPR_NODE_LUT, } },
 167         { VSP1_ENTITY_RPF, 0, VI6_DPR_RPF_ROUTE(0), { VI6_DPR_NODE_RPF(0), } },
 168         { VSP1_ENTITY_RPF, 1, VI6_DPR_RPF_ROUTE(1), { VI6_DPR_NODE_RPF(1), } },
 169         { VSP1_ENTITY_RPF, 2, VI6_DPR_RPF_ROUTE(2), { VI6_DPR_NODE_RPF(2), } },
 170         { VSP1_ENTITY_RPF, 3, VI6_DPR_RPF_ROUTE(3), { VI6_DPR_NODE_RPF(3), } },
 171         { VSP1_ENTITY_RPF, 4, VI6_DPR_RPF_ROUTE(4), { VI6_DPR_NODE_RPF(4), } },
 172         { VSP1_ENTITY_SRU, 0, VI6_DPR_SRU_ROUTE, { VI6_DPR_NODE_SRU, } },
 173         { VSP1_ENTITY_UDS, 0, VI6_DPR_UDS_ROUTE(0), { VI6_DPR_NODE_UDS(0), } },
 174         { VSP1_ENTITY_UDS, 1, VI6_DPR_UDS_ROUTE(1), { VI6_DPR_NODE_UDS(1), } },
 175         { VSP1_ENTITY_UDS, 2, VI6_DPR_UDS_ROUTE(2), { VI6_DPR_NODE_UDS(2), } },
 176         { VSP1_ENTITY_WPF, 0, 0, { VI6_DPR_NODE_WPF(0), } },
 177         { VSP1_ENTITY_WPF, 1, 0, { VI6_DPR_NODE_WPF(1), } },
 178         { VSP1_ENTITY_WPF, 2, 0, { VI6_DPR_NODE_WPF(2), } },
 179         { VSP1_ENTITY_WPF, 3, 0, { VI6_DPR_NODE_WPF(3), } },
 180 };
 181
 182 int vsp1_entity_init(struct vsp1_device *vsp1, struct vsp1_entity *entity,
 183                      unsigned int num_pads)
 184 {
 185         unsigned int i;
 186
 187         for (i = 0; i < ARRAY_SIZE(vsp1_routes); ++i) {
 188                 if (vsp1_routes[i].type == entity->type &&
 189                     vsp1_routes[i].index == entity->index) {
 190                         entity->route = &vsp1_routes[i];
 191                         break;
 192                 }
 193         }
 194
 195         if (i == ARRAY_SIZE(vsp1_routes))
 196                 return -EINVAL;
 197
 198         spin_lock_init(&entity->lock);
 199
 200         entity->vsp1 = vsp1;
 201         entity->source_pad = num_pads - 1;
 202
 203         /* Allocate formats and pads. */
 204         entity->formats = devm_kzalloc(vsp1->dev,
 205                                        num_pads * sizeof(*entity->formats),
 206                                        GFP_KERNEL);
 207         if (entity->formats == NULL)
 208                 return -ENOMEM;
 209
 210         entity->pads = devm_kzalloc(vsp1->dev, num_pads * sizeof(*entity->pads),
 211                                     GFP_KERNEL);
 212         if (entity->pads == NULL)
 213                 return -ENOMEM;
 214
 215         /* Initialize pads. */
 216         for (i = 0; i < num_pads - 1; ++i)
 217                 entity->pads[i].flags = MEDIA_PAD_FL_SINK;
 218
 219         entity->pads[num_pads - 1].flags = MEDIA_PAD_FL_SOURCE;
 220
 221         /* Initialize the media entity. */
 222         return media_entity_init(&entity->subdev.entity, num_pads,
 223                                  entity->pads, 0);
 224 }
 225
 226 void vsp1_entity_destroy(struct vsp1_entity *entity)
 227 {
 228         if (entity->video)
 229                 vsp1_video_cleanup(entity->video);
 230         if (entity->subdev.ctrl_handler)
 231                 v4l2_ctrl_handler_free(entity->subdev.ctrl_handler);
 232         media_entity_cleanup(&entity->subdev.entity);
 233 }