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