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_subdev_pad_config *config;
  50         struct v4l2_mbus_framefmt *format;
  51
  52         config = vsp1_entity_get_pad_config(&rwpf->entity, cfg, fse->which);
  53         if (!config)
  54                 return -EINVAL;
  55
  56         format = vsp1_entity_get_pad_format(&rwpf->entity, config, fse->pad);
  57
  58         if (fse->index || fse->code != format->code)
  59                 return -EINVAL;
  60
  61         if (fse->pad == RWPF_PAD_SINK) {
  62                 fse->min_width = RWPF_MIN_WIDTH;
  63                 fse->max_width = rwpf->max_width;
  64                 fse->min_height = RWPF_MIN_HEIGHT;
  65                 fse->max_height = rwpf->max_height;
  66         } else {
  67                 /* The size on the source pad are fixed and always identical to
  68                  * the size on the sink pad.
  69                  */
  70                 fse->min_width = format->width;
  71                 fse->max_width = format->width;
  72                 fse->min_height = format->height;
  73                 fse->max_height = format->height;
  74         }
  75
  76         return 0;
  77 }
  78
  79 static struct v4l2_rect *
  80 vsp1_rwpf_get_crop(struct vsp1_rwpf *rwpf, struct v4l2_subdev_pad_config *cfg,
  81                    u32 which)
  82 {
  83         switch (which) {
  84         case V4L2_SUBDEV_FORMAT_TRY:
  85                 return v4l2_subdev_get_try_crop(&rwpf->entity.subdev, cfg,
  86                                                 RWPF_PAD_SINK);
  87         case V4L2_SUBDEV_FORMAT_ACTIVE:
  88                 return &rwpf->crop;
  89         default:
  90                 return NULL;
  91         }
  92 }
  93
  94 int vsp1_rwpf_get_format(struct v4l2_subdev *subdev,
  95                          struct v4l2_subdev_pad_config *cfg,
  96                          struct v4l2_subdev_format *fmt)
  97 {
  98         struct vsp1_rwpf *rwpf = to_rwpf(subdev);
  99         struct v4l2_subdev_pad_config *config;
 100
 101         config = vsp1_entity_get_pad_config(&rwpf->entity, cfg, fmt->which);
 102         if (!config)
 103                 return -EINVAL;
 104
 105         fmt->format = *vsp1_entity_get_pad_format(&rwpf->entity, config,
 106                                                   fmt->pad);
 107
 108         return 0;
 109 }
 110
 111 int vsp1_rwpf_set_format(struct v4l2_subdev *subdev,
 112                          struct v4l2_subdev_pad_config *cfg,
 113                          struct v4l2_subdev_format *fmt)
 114 {
 115         struct vsp1_rwpf *rwpf = to_rwpf(subdev);
 116         struct v4l2_subdev_pad_config *config;
 117         struct v4l2_mbus_framefmt *format;
 118         struct v4l2_rect *crop;
 119
 120         config = vsp1_entity_get_pad_config(&rwpf->entity, cfg, fmt->which);
 121         if (!config)
 122                 return -EINVAL;
 123
 124         /* Default to YUV if the requested format is not supported. */
 125         if (fmt->format.code != MEDIA_BUS_FMT_ARGB8888_1X32 &&
 126             fmt->format.code != MEDIA_BUS_FMT_AYUV8_1X32)
 127                 fmt->format.code = MEDIA_BUS_FMT_AYUV8_1X32;
 128
 129         format = vsp1_entity_get_pad_format(&rwpf->entity, config, fmt->pad);
 130
 131         if (fmt->pad == RWPF_PAD_SOURCE) {
 132                 /* The RWPF performs format conversion but can't scale, only the
 133                  * format code can be changed on the source pad.
 134                  */
 135                 format->code = fmt->format.code;
 136                 fmt->format = *format;
 137                 return 0;
 138         }
 139
 140         format->code = fmt->format.code;
 141         format->width = clamp_t(unsigned int, fmt->format.width,
 142                                 RWPF_MIN_WIDTH, rwpf->max_width);
 143         format->height = clamp_t(unsigned int, fmt->format.height,
 144                                  RWPF_MIN_HEIGHT, rwpf->max_height);
 145         format->field = V4L2_FIELD_NONE;
 146         format->colorspace = V4L2_COLORSPACE_SRGB;
 147
 148         fmt->format = *format;
 149
 150         /* Update the sink crop rectangle. */
 151         crop = vsp1_rwpf_get_crop(rwpf, cfg, fmt->which);
 152         crop->left = 0;
 153         crop->top = 0;
 154         crop->width = fmt->format.width;
 155         crop->height = fmt->format.height;
 156
 157         /* Propagate the format to the source pad. */
 158         format = vsp1_entity_get_pad_format(&rwpf->entity, config,
 159                                             RWPF_PAD_SOURCE);
 160         *format = fmt->format;
 161
 162         return 0;
 163 }
 164
 165 int vsp1_rwpf_get_selection(struct v4l2_subdev *subdev,
 166                             struct v4l2_subdev_pad_config *cfg,
 167                             struct v4l2_subdev_selection *sel)
 168 {
 169         struct vsp1_rwpf *rwpf = to_rwpf(subdev);
 170         struct v4l2_subdev_pad_config *config;
 171         struct v4l2_mbus_framefmt *format;
 172
 173         /* Cropping is implemented on the sink pad. */
 174         if (sel->pad != RWPF_PAD_SINK)
 175                 return -EINVAL;
 176
 177         config = vsp1_entity_get_pad_config(&rwpf->entity, cfg, sel->which);
 178         if (!config)
 179                 return -EINVAL;
 180
 181         switch (sel->target) {
 182         case V4L2_SEL_TGT_CROP:
 183                 sel->r = *vsp1_rwpf_get_crop(rwpf, cfg, sel->which);
 184                 break;
 185
 186         case V4L2_SEL_TGT_CROP_BOUNDS:
 187                 format = vsp1_entity_get_pad_format(&rwpf->entity, config,
 188                                                     RWPF_PAD_SINK);
 189                 sel->r.left = 0;
 190                 sel->r.top = 0;
 191                 sel->r.width = format->width;
 192                 sel->r.height = format->height;
 193                 break;
 194
 195         default:
 196                 return -EINVAL;
 197         }
 198
 199         return 0;
 200 }
 201
 202 int vsp1_rwpf_set_selection(struct v4l2_subdev *subdev,
 203                             struct v4l2_subdev_pad_config *cfg,
 204                             struct v4l2_subdev_selection *sel)
 205 {
 206         struct vsp1_rwpf *rwpf = to_rwpf(subdev);
 207         struct v4l2_subdev_pad_config *config;
 208         struct v4l2_mbus_framefmt *format;
 209         struct v4l2_rect *crop;
 210
 211         /* Cropping is implemented on the sink pad. */
 212         if (sel->pad != RWPF_PAD_SINK)
 213                 return -EINVAL;
 214
 215         if (sel->target != V4L2_SEL_TGT_CROP)
 216                 return -EINVAL;
 217
 218         config = vsp1_entity_get_pad_config(&rwpf->entity, cfg, sel->which);
 219         if (!config)
 220                 return -EINVAL;
 221
 222         /* Make sure the crop rectangle is entirely contained in the image. The
 223          * WPF top and left offsets are limited to 255.
 224          */
 225         format = vsp1_entity_get_pad_format(&rwpf->entity, config,
 226                                             RWPF_PAD_SINK);
 227
 228         /* Restrict the crop rectangle coordinates to multiples of 2 to avoid
 229          * shifting the color plane.
 230          */
 231         if (format->code == MEDIA_BUS_FMT_AYUV8_1X32) {
 232                 sel->r.left = ALIGN(sel->r.left, 2);
 233                 sel->r.top = ALIGN(sel->r.top, 2);
 234                 sel->r.width = round_down(sel->r.width, 2);
 235                 sel->r.height = round_down(sel->r.height, 2);
 236         }
 237
 238         sel->r.left = min_t(unsigned int, sel->r.left, format->width - 2);
 239         sel->r.top = min_t(unsigned int, sel->r.top, format->height - 2);
 240         if (rwpf->entity.type == VSP1_ENTITY_WPF) {
 241                 sel->r.left = min_t(unsigned int, sel->r.left, 255);
 242                 sel->r.top = min_t(unsigned int, sel->r.top, 255);
 243         }
 244         sel->r.width = min_t(unsigned int, sel->r.width,
 245                              format->width - sel->r.left);
 246         sel->r.height = min_t(unsigned int, sel->r.height,
 247                               format->height - sel->r.top);
 248
 249         crop = vsp1_rwpf_get_crop(rwpf, cfg, sel->which);
 250         *crop = sel->r;
 251
 252         /* Propagate the format to the source pad. */
 253         format = vsp1_entity_get_pad_format(&rwpf->entity, config,
 254                                             RWPF_PAD_SOURCE);
 255         format->width = crop->width;
 256         format->height = crop->height;
 257
 258         return 0;
 259 }
 260
 261 /* -----------------------------------------------------------------------------
 262  * Controls
 263  */
 264
 265 static int vsp1_rwpf_s_ctrl(struct v4l2_ctrl *ctrl)
 266 {
 267         struct vsp1_rwpf *rwpf =
 268                 container_of(ctrl->handler, struct vsp1_rwpf, ctrls);
 269
 270         switch (ctrl->id) {
 271         case V4L2_CID_ALPHA_COMPONENT:
 272                 rwpf->alpha = ctrl->val;
 273                 break;
 274         }
 275
 276         return 0;
 277 }
 278
 279 static const struct v4l2_ctrl_ops vsp1_rwpf_ctrl_ops = {
 280         .s_ctrl = vsp1_rwpf_s_ctrl,
 281 };
 282
 283 int vsp1_rwpf_init_ctrls(struct vsp1_rwpf *rwpf)
 284 {
 285         rwpf->alpha = 255;
 286
 287         v4l2_ctrl_handler_init(&rwpf->ctrls, 1);
 288         v4l2_ctrl_new_std(&rwpf->ctrls, &vsp1_rwpf_ctrl_ops,
 289                           V4L2_CID_ALPHA_COMPONENT, 0, 255, 1, 255);
 290
 291         rwpf->entity.subdev.ctrl_handler = &rwpf->ctrls;
 292
 293         return rwpf->ctrls.error;
 294 }