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_dl.h"
  23 #include "vsp1_entity.h"
  24 #include "vsp1_pipe.h"
  25
  26 void vsp1_mod_write(struct vsp1_entity *e, u32 reg, u32 data)
  27 {
  28         struct vsp1_pipeline *pipe = to_vsp1_pipeline(&e->subdev.entity);
  29
  30         if (pipe->dl)
  31                 vsp1_dl_list_write(pipe->dl, reg, data);
  32         else
  33                 vsp1_write(e->vsp1, reg, data);
  34 }
  35
  36 void vsp1_entity_route_setup(struct vsp1_entity *source)
  37 {
  38         struct vsp1_entity *sink;
  39
  40         if (source->route->reg == 0)
  41                 return;
  42
  43         sink = container_of(source->sink, struct vsp1_entity, subdev.entity);
  44         vsp1_mod_write(source, source->route->reg,
  45                        sink->route->inputs[source->sink_pad]);
  46 }
  47
  48 /* -----------------------------------------------------------------------------
  49  * V4L2 Subdevice Operations
  50  */
  51
  52 struct v4l2_mbus_framefmt *
  53 vsp1_entity_get_pad_format(struct vsp1_entity *entity,
  54                            struct v4l2_subdev_pad_config *cfg,
  55                            unsigned int pad, u32 which)
  56 {
  57         switch (which) {
  58         case V4L2_SUBDEV_FORMAT_TRY:
  59                 return v4l2_subdev_get_try_format(&entity->subdev, cfg, pad);
  60         case V4L2_SUBDEV_FORMAT_ACTIVE:
  61                 return &entity->formats[pad];
  62         default:
  63                 return NULL;
  64         }
  65 }
  66
  67 /*
  68  * vsp1_entity_init_formats - Initialize formats on all pads
  69  * @subdev: V4L2 subdevice
  70  * @cfg: V4L2 subdev pad configuration
  71  *
  72  * Initialize all pad formats with default values. If cfg is not NULL, try
  73  * formats are initialized on the file handle. Otherwise active formats are
  74  * initialized on the device.
  75  */
  76 void vsp1_entity_init_formats(struct v4l2_subdev *subdev,
  77                             struct v4l2_subdev_pad_config *cfg)
  78 {
  79         struct v4l2_subdev_format format;
  80         unsigned int pad;
  81
  82         for (pad = 0; pad < subdev->entity.num_pads - 1; ++pad) {
  83                 memset(&format, 0, sizeof(format));
  84
  85                 format.pad = pad;
  86                 format.which = cfg ? V4L2_SUBDEV_FORMAT_TRY
  87                              : V4L2_SUBDEV_FORMAT_ACTIVE;
  88
  89                 v4l2_subdev_call(subdev, pad, set_fmt, cfg, &format);
  90         }
  91 }
  92
  93 static int vsp1_entity_open(struct v4l2_subdev *subdev,
  94                             struct v4l2_subdev_fh *fh)
  95 {
  96         vsp1_entity_init_formats(subdev, fh->pad);
  97
  98         return 0;
  99 }
 100
 101 const struct v4l2_subdev_internal_ops vsp1_subdev_internal_ops = {
 102         .open = vsp1_entity_open,
 103 };
 104
 105 /* -----------------------------------------------------------------------------
 106  * Media Operations
 107  */
 108
 109 int vsp1_entity_link_setup(struct media_entity *entity,
 110                            const struct media_pad *local,
 111                            const struct media_pad *remote, u32 flags)
 112 {
 113         struct vsp1_entity *source;
 114
 115         if (!(local->flags & MEDIA_PAD_FL_SOURCE))
 116                 return 0;
 117
 118         source = container_of(local->entity, struct vsp1_entity, subdev.entity);
 119
 120         if (!source->route)
 121                 return 0;
 122
 123         if (flags & MEDIA_LNK_FL_ENABLED) {
 124                 if (source->sink)
 125                         return -EBUSY;
 126                 source->sink = remote->entity;
 127                 source->sink_pad = remote->index;
 128         } else {
 129                 source->sink = NULL;
 130                 source->sink_pad = 0;
 131         }
 132
 133         return 0;
 134 }
 135
 136 /* -----------------------------------------------------------------------------
 137  * Initialization
 138  */
 139
 140 static const struct vsp1_route vsp1_routes[] = {
 141         { VSP1_ENTITY_BRU, 0, VI6_DPR_BRU_ROUTE,
 142           { VI6_DPR_NODE_BRU_IN(0), VI6_DPR_NODE_BRU_IN(1),
 143             VI6_DPR_NODE_BRU_IN(2), VI6_DPR_NODE_BRU_IN(3),
 144             VI6_DPR_NODE_BRU_IN(4) } },
 145         { VSP1_ENTITY_HSI, 0, VI6_DPR_HSI_ROUTE, { VI6_DPR_NODE_HSI, } },
 146         { VSP1_ENTITY_HST, 0, VI6_DPR_HST_ROUTE, { VI6_DPR_NODE_HST, } },
 147         { VSP1_ENTITY_LIF, 0, 0, { VI6_DPR_NODE_LIF, } },
 148         { VSP1_ENTITY_LUT, 0, VI6_DPR_LUT_ROUTE, { VI6_DPR_NODE_LUT, } },
 149         { VSP1_ENTITY_RPF, 0, VI6_DPR_RPF_ROUTE(0), { VI6_DPR_NODE_RPF(0), } },
 150         { VSP1_ENTITY_RPF, 1, VI6_DPR_RPF_ROUTE(1), { VI6_DPR_NODE_RPF(1), } },
 151         { VSP1_ENTITY_RPF, 2, VI6_DPR_RPF_ROUTE(2), { VI6_DPR_NODE_RPF(2), } },
 152         { VSP1_ENTITY_RPF, 3, VI6_DPR_RPF_ROUTE(3), { VI6_DPR_NODE_RPF(3), } },
 153         { VSP1_ENTITY_RPF, 4, VI6_DPR_RPF_ROUTE(4), { VI6_DPR_NODE_RPF(4), } },
 154         { VSP1_ENTITY_SRU, 0, VI6_DPR_SRU_ROUTE, { VI6_DPR_NODE_SRU, } },
 155         { VSP1_ENTITY_UDS, 0, VI6_DPR_UDS_ROUTE(0), { VI6_DPR_NODE_UDS(0), } },
 156         { VSP1_ENTITY_UDS, 1, VI6_DPR_UDS_ROUTE(1), { VI6_DPR_NODE_UDS(1), } },
 157         { VSP1_ENTITY_UDS, 2, VI6_DPR_UDS_ROUTE(2), { VI6_DPR_NODE_UDS(2), } },
 158         { VSP1_ENTITY_WPF, 0, 0, { VI6_DPR_NODE_WPF(0), } },
 159         { VSP1_ENTITY_WPF, 1, 0, { VI6_DPR_NODE_WPF(1), } },
 160         { VSP1_ENTITY_WPF, 2, 0, { VI6_DPR_NODE_WPF(2), } },
 161         { VSP1_ENTITY_WPF, 3, 0, { VI6_DPR_NODE_WPF(3), } },
 162 };
 163
 164 int vsp1_entity_init(struct vsp1_device *vsp1, struct vsp1_entity *entity,
 165                      unsigned int num_pads)
 166 {
 167         unsigned int i;
 168
 169         for (i = 0; i < ARRAY_SIZE(vsp1_routes); ++i) {
 170                 if (vsp1_routes[i].type == entity->type &&
 171                     vsp1_routes[i].index == entity->index) {
 172                         entity->route = &vsp1_routes[i];
 173                         break;
 174                 }
 175         }
 176
 177         if (i == ARRAY_SIZE(vsp1_routes))
 178                 return -EINVAL;
 179
 180         entity->vsp1 = vsp1;
 181         entity->source_pad = num_pads - 1;
 182
 183         /* Allocate formats and pads. */
 184         entity->formats = devm_kzalloc(vsp1->dev,
 185                                        num_pads * sizeof(*entity->formats),
 186                                        GFP_KERNEL);
 187         if (entity->formats == NULL)
 188                 return -ENOMEM;
 189
 190         entity->pads = devm_kzalloc(vsp1->dev, num_pads * sizeof(*entity->pads),
 191                                     GFP_KERNEL);
 192         if (entity->pads == NULL)
 193                 return -ENOMEM;
 194
 195         /* Initialize pads. */
 196         for (i = 0; i < num_pads - 1; ++i)
 197                 entity->pads[i].flags = MEDIA_PAD_FL_SINK;
 198
 199         entity->pads[num_pads - 1].flags = MEDIA_PAD_FL_SOURCE;
 200
 201         /* Initialize the media entity. */
 202         return media_entity_pads_init(&entity->subdev.entity, num_pads,
 203                                  entity->pads);
 204 }
 205
 206 void vsp1_entity_destroy(struct vsp1_entity *entity)
 207 {
 208         if (entity->destroy)
 209                 entity->destroy(entity);
 210         if (entity->subdev.ctrl_handler)
 211                 v4l2_ctrl_handler_free(entity->subdev.ctrl_handler);
 212         media_entity_cleanup(&entity->subdev.entity);
 213 }