kernel/drivers/media/platform/vsp1/vsp1_rwpf.c

   1 /*
   2  * vsp1_rwpf.c  --  R-Car VSP1 Read and Write Pixel Formatters
   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 <media/v4l2-subdev.h>
  15
  16 #include "vsp1.h"
  17 #include "vsp1_rwpf.h"
  18 #include "vsp1_video.h"
  19
  20 #define RWPF_MIN_WIDTH                          1
  21 #define RWPF_MIN_HEIGHT                         1
  22
  23 /* -----------------------------------------------------------------------------
  24  * V4L2 Subdevice Pad Operations
  25  */
  26
  27 int vsp1_rwpf_enum_mbus_code(struct v4l2_subdev *subdev,
  28                              struct v4l2_subdev_pad_config *cfg,
  29                              struct v4l2_subdev_mbus_code_enum *code)
  30 {
  31         static const unsigned int codes[] = {
  32                 MEDIA_BUS_FMT_ARGB8888_1X32,
  33                 MEDIA_BUS_FMT_AYUV8_1X32,
  34         };
  35
  36         if (code->index >= ARRAY_SIZE(codes))
  37                 return -EINVAL;
  38
  39         code->code = codes[code->index];
  40
  41         return 0;
  42 }
  43
  44 int vsp1_rwpf_enum_frame_size(struct v4l2_subdev *subdev,
  45                               struct v4l2_subdev_pad_config *cfg,
  46                               struct v4l2_subdev_frame_size_enum *fse)
  47 {
  48         struct vsp1_rwpf *rwpf = to_rwpf(subdev);
  49         struct v4l2_mbus_framefmt *format;
  50
  51         format = vsp1_entity_get_pad_format(&rwpf->entity, cfg, fse->pad,
  52                                             fse->which);
  53
  54         if (fse->index || fse->code != format->code)
  55                 return -EINVAL;
  56
  57         if (fse->pad == RWPF_PAD_SINK) {
  58                 fse->min_width = RWPF_MIN_WIDTH;
  59                 fse->max_width = rwpf->max_width;
  60                 fse->min_height = RWPF_MIN_HEIGHT;
  61                 fse->max_height = rwpf->max_height;
  62         } else {
  63                 /* The size on the source pad are fixed and always identical to
  64                  * the size on the sink pad.
  65                  */
  66                 fse->min_width = format->width;
  67                 fse->max_width = format->width;
  68                 fse->min_height = format->height;
  69                 fse->max_height = format->height;
  70         }
  71
  72         return 0;
  73 }
  74
  75 static struct v4l2_rect *
  76 vsp1_rwpf_get_crop(struct vsp1_rwpf *rwpf, struct v4l2_subdev_pad_config *cfg, u32 which)
  77 {
  78         switch (which) {
  79         case V4L2_SUBDEV_FORMAT_TRY:
  80                 return v4l2_subdev_get_try_crop(&rwpf->entity.subdev, cfg, RWPF_PAD_SINK);
  81         case V4L2_SUBDEV_FORMAT_ACTIVE:
  82                 return &rwpf->crop;
  83         default:
  84                 return NULL;
  85         }
  86 }
  87
  88 int vsp1_rwpf_get_format(struct v4l2_subdev *subdev, struct v4l2_subdev_pad_config *cfg,
  89                          struct v4l2_subdev_format *fmt)
  90 {
  91         struct vsp1_rwpf *rwpf = to_rwpf(subdev);
  92
  93         fmt->format = *vsp1_entity_get_pad_format(&rwpf->entity, cfg, fmt->pad,
  94                                                   fmt->which);
  95
  96         return 0;
  97 }
  98
  99 int vsp1_rwpf_set_format(struct v4l2_subdev *subdev, struct v4l2_subdev_pad_config *cfg,
 100                          struct v4l2_subdev_format *fmt)
 101 {
 102         struct vsp1_rwpf *rwpf = to_rwpf(subdev);
 103         struct v4l2_mbus_framefmt *format;
 104         struct v4l2_rect *crop;
 105
 106         /* Default to YUV if the requested format is not supported. */
 107         if (fmt->format.code != MEDIA_BUS_FMT_ARGB8888_1X32 &&
 108             fmt->format.code != MEDIA_BUS_FMT_AYUV8_1X32)
 109                 fmt->format.code = MEDIA_BUS_FMT_AYUV8_1X32;
 110
 111         format = vsp1_entity_get_pad_format(&rwpf->entity, cfg, fmt->pad,
 112                                             fmt->which);
 113
 114         if (fmt->pad == RWPF_PAD_SOURCE) {
 115                 /* The RWPF performs format conversion but can't scale, only the
 116                  * format code can be changed on the source pad.
 117                  */
 118                 format->code = fmt->format.code;
 119                 fmt->format = *format;
 120                 return 0;
 121         }
 122
 123         format->code = fmt->format.code;
 124         format->width = clamp_t(unsigned int, fmt->format.width,
 125                                 RWPF_MIN_WIDTH, rwpf->max_width);
 126         format->height = clamp_t(unsigned int, fmt->format.height,
 127                                  RWPF_MIN_HEIGHT, rwpf->max_height);
 128         format->field = V4L2_FIELD_NONE;
 129         format->colorspace = V4L2_COLORSPACE_SRGB;
 130
 131         fmt->format = *format;
 132
 133         /* Update the sink crop rectangle. */
 134         crop = vsp1_rwpf_get_crop(rwpf, cfg, fmt->which);
 135         crop->left = 0;
 136         crop->top = 0;
 137         crop->width = fmt->format.width;
 138         crop->height = fmt->format.height;
 139
 140         /* Propagate the format to the source pad. */
 141         format = vsp1_entity_get_pad_format(&rwpf->entity, cfg, RWPF_PAD_SOURCE,
 142                                             fmt->which);
 143         *format = fmt->format;
 144
 145         return 0;
 146 }
 147
 148 int vsp1_rwpf_get_selection(struct v4l2_subdev *subdev,
 149                             struct v4l2_subdev_pad_config *cfg,
 150                             struct v4l2_subdev_selection *sel)
 151 {
 152         struct vsp1_rwpf *rwpf = to_rwpf(subdev);
 153         struct v4l2_mbus_framefmt *format;
 154
 155         /* Cropping is implemented on the sink pad. */
 156         if (sel->pad != RWPF_PAD_SINK)
 157                 return -EINVAL;
 158
 159         switch (sel->target) {
 160         case V4L2_SEL_TGT_CROP:
 161                 sel->r = *vsp1_rwpf_get_crop(rwpf, cfg, sel->which);
 162                 break;
 163
 164         case V4L2_SEL_TGT_CROP_BOUNDS:
 165                 format = vsp1_entity_get_pad_format(&rwpf->entity, cfg,
 166                                                     RWPF_PAD_SINK, sel->which);
 167                 sel->r.left = 0;
 168                 sel->r.top = 0;
 169                 sel->r.width = format->width;
 170                 sel->r.height = format->height;
 171                 break;
 172
 173         default:
 174                 return -EINVAL;
 175         }
 176
 177         return 0;
 178 }
 179
 180 int vsp1_rwpf_set_selection(struct v4l2_subdev *subdev,
 181                             struct v4l2_subdev_pad_config *cfg,
 182                             struct v4l2_subdev_selection *sel)
 183 {
 184         struct vsp1_rwpf *rwpf = to_rwpf(subdev);
 185         struct v4l2_mbus_framefmt *format;
 186         struct v4l2_rect *crop;
 187
 188         /* Cropping is implemented on the sink pad. */
 189         if (sel->pad != RWPF_PAD_SINK)
 190                 return -EINVAL;
 191
 192         if (sel->target != V4L2_SEL_TGT_CROP)
 193                 return -EINVAL;
 194
 195         /* Make sure the crop rectangle is entirely contained in the image. The
 196          * WPF top and left offsets are limited to 255.
 197          */
 198         format = vsp1_entity_get_pad_format(&rwpf->entity, cfg, RWPF_PAD_SINK,
 199                                             sel->which);
 200         sel->r.left = min_t(unsigned int, sel->r.left, format->width - 2);
 201         sel->r.top = min_t(unsigned int, sel->r.top, format->height - 2);
 202         if (rwpf->entity.type == VSP1_ENTITY_WPF) {
 203                 sel->r.left = min_t(unsigned int, sel->r.left, 255);
 204                 sel->r.top = min_t(unsigned int, sel->r.top, 255);
 205         }
 206         sel->r.width = min_t(unsigned int, sel->r.width,
 207                              format->width - sel->r.left);
 208         sel->r.height = min_t(unsigned int, sel->r.height,
 209                               format->height - sel->r.top);
 210
 211         crop = vsp1_rwpf_get_crop(rwpf, cfg, sel->which);
 212         *crop = sel->r;
 213
 214         /* Propagate the format to the source pad. */
 215         format = vsp1_entity_get_pad_format(&rwpf->entity, cfg, RWPF_PAD_SOURCE,
 216                                             sel->which);
 217         format->width = crop->width;
 218         format->height = crop->height;
 219
 220         return 0;
 221 }