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