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_fh *fh,
  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_fh *fh,
  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 = v4l2_subdev_get_try_format(fh, fse->pad);
  52
  53         if (fse->index || fse->code != format->code)
  54                 return -EINVAL;
  55
  56         if (fse->pad == RWPF_PAD_SINK) {
  57                 fse->min_width = RWPF_MIN_WIDTH;
  58                 fse->max_width = rwpf->max_width;
  59                 fse->min_height = RWPF_MIN_HEIGHT;
  60                 fse->max_height = rwpf->max_height;
  61         } else {
  62                 /* The size on the source pad are fixed and always identical to
  63                  * the size on the sink pad.
  64                  */
  65                 fse->min_width = format->width;
  66                 fse->max_width = format->width;
  67                 fse->min_height = format->height;
  68                 fse->max_height = format->height;
  69         }
  70
  71         return 0;
  72 }
  73
  74 static struct v4l2_rect *
  75 vsp1_rwpf_get_crop(struct vsp1_rwpf *rwpf, struct v4l2_subdev_fh *fh, u32 which)
  76 {
  77         switch (which) {
  78         case V4L2_SUBDEV_FORMAT_TRY:
  79                 return v4l2_subdev_get_try_crop(fh, RWPF_PAD_SINK);
  80         case V4L2_SUBDEV_FORMAT_ACTIVE:
  81                 return &rwpf->crop;
  82         default:
  83                 return NULL;
  84         }
  85 }
  86
  87 int vsp1_rwpf_get_format(struct v4l2_subdev *subdev, struct v4l2_subdev_fh *fh,
  88                          struct v4l2_subdev_format *fmt)
  89 {
  90         struct vsp1_rwpf *rwpf = to_rwpf(subdev);
  91
  92         fmt->format = *vsp1_entity_get_pad_format(&rwpf->entity, fh, fmt->pad,
  93                                                   fmt->which);
  94
  95         return 0;
  96 }
  97
  98 int vsp1_rwpf_set_format(struct v4l2_subdev *subdev, struct v4l2_subdev_fh *fh,
  99                          struct v4l2_subdev_format *fmt)
 100 {
 101         struct vsp1_rwpf *rwpf = to_rwpf(subdev);
 102         struct v4l2_mbus_framefmt *format;
 103         struct v4l2_rect *crop;
 104
 105         /* Default to YUV if the requested format is not supported. */
 106         if (fmt->format.code != MEDIA_BUS_FMT_ARGB8888_1X32 &&
 107             fmt->format.code != MEDIA_BUS_FMT_AYUV8_1X32)
 108                 fmt->format.code = MEDIA_BUS_FMT_AYUV8_1X32;
 109
 110         format = vsp1_entity_get_pad_format(&rwpf->entity, fh, fmt->pad,
 111                                             fmt->which);
 112
 113         if (fmt->pad == RWPF_PAD_SOURCE) {
 114                 /* The RWPF performs format conversion but can't scale, only the
 115                  * format code can be changed on the source pad.
 116                  */
 117                 format->code = fmt->format.code;
 118                 fmt->format = *format;
 119                 return 0;
 120         }
 121
 122         format->code = fmt->format.code;
 123         format->width = clamp_t(unsigned int, fmt->format.width,
 124                                 RWPF_MIN_WIDTH, rwpf->max_width);
 125         format->height = clamp_t(unsigned int, fmt->format.height,
 126                                  RWPF_MIN_HEIGHT, rwpf->max_height);
 127         format->field = V4L2_FIELD_NONE;
 128         format->colorspace = V4L2_COLORSPACE_SRGB;
 129
 130         fmt->format = *format;
 131
 132         /* Update the sink crop rectangle. */
 133         crop = vsp1_rwpf_get_crop(rwpf, fh, fmt->which);
 134         crop->left = 0;
 135         crop->top = 0;
 136         crop->width = fmt->format.width;
 137         crop->height = fmt->format.height;
 138
 139         /* Propagate the format to the source pad. */
 140         format = vsp1_entity_get_pad_format(&rwpf->entity, fh, RWPF_PAD_SOURCE,
 141                                             fmt->which);
 142         *format = fmt->format;
 143
 144         return 0;
 145 }
 146
 147 int vsp1_rwpf_get_selection(struct v4l2_subdev *subdev,
 148                             struct v4l2_subdev_fh *fh,
 149                             struct v4l2_subdev_selection *sel)
 150 {
 151         struct vsp1_rwpf *rwpf = to_rwpf(subdev);
 152         struct v4l2_mbus_framefmt *format;
 153
 154         /* Cropping is implemented on the sink pad. */
 155         if (sel->pad != RWPF_PAD_SINK)
 156                 return -EINVAL;
 157
 158         switch (sel->target) {
 159         case V4L2_SEL_TGT_CROP:
 160                 sel->r = *vsp1_rwpf_get_crop(rwpf, fh, sel->which);
 161                 break;
 162
 163         case V4L2_SEL_TGT_CROP_BOUNDS:
 164                 format = vsp1_entity_get_pad_format(&rwpf->entity, fh,
 165                                                     RWPF_PAD_SINK, sel->which);
 166                 sel->r.left = 0;
 167                 sel->r.top = 0;
 168                 sel->r.width = format->width;
 169                 sel->r.height = format->height;
 170                 break;
 171
 172         default:
 173                 return -EINVAL;
 174         }
 175
 176         return 0;
 177 }
 178
 179 int vsp1_rwpf_set_selection(struct v4l2_subdev *subdev,
 180                             struct v4l2_subdev_fh *fh,
 181                             struct v4l2_subdev_selection *sel)
 182 {
 183         struct vsp1_rwpf *rwpf = to_rwpf(subdev);
 184         struct v4l2_mbus_framefmt *format;
 185         struct v4l2_rect *crop;
 186
 187         /* Cropping is implemented on the sink pad. */
 188         if (sel->pad != RWPF_PAD_SINK)
 189                 return -EINVAL;
 190
 191         if (sel->target != V4L2_SEL_TGT_CROP)
 192                 return -EINVAL;
 193
 194         /* Make sure the crop rectangle is entirely contained in the image. The
 195          * WPF top and left offsets are limited to 255.
 196          */
 197         format = vsp1_entity_get_pad_format(&rwpf->entity, fh, RWPF_PAD_SINK,
 198                                             sel->which);
 199         sel->r.left = min_t(unsigned int, sel->r.left, format->width - 2);
 200         sel->r.top = min_t(unsigned int, sel->r.top, format->height - 2);
 201         if (rwpf->entity.type == VSP1_ENTITY_WPF) {
 202                 sel->r.left = min_t(unsigned int, sel->r.left, 255);
 203                 sel->r.top = min_t(unsigned int, sel->r.top, 255);
 204         }
 205         sel->r.width = min_t(unsigned int, sel->r.width,
 206                              format->width - sel->r.left);
 207         sel->r.height = min_t(unsigned int, sel->r.height,
 208                               format->height - sel->r.top);
 209
 210         crop = vsp1_rwpf_get_crop(rwpf, fh, sel->which);
 211         *crop = sel->r;
 212
 213         /* Propagate the format to the source pad. */
 214         format = vsp1_entity_get_pad_format(&rwpf->entity, fh, RWPF_PAD_SOURCE,
 215                                             sel->which);
 216         format->width = crop->width;
 217         format->height = crop->height;
 218
 219         return 0;
 220 }