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 struct v4l2_rect *vsp1_rwpf_get_crop(struct vsp1_rwpf *rwpf,
  24                                      struct v4l2_subdev_pad_config *config)
  25 {
  26         return v4l2_subdev_get_try_crop(&rwpf->entity.subdev, config,
  27                                         RWPF_PAD_SINK);
  28 }
  29
  30 /* -----------------------------------------------------------------------------
  31  * V4L2 Subdevice Pad Operations
  32  */
  33
  34 static int vsp1_rwpf_enum_mbus_code(struct v4l2_subdev *subdev,
  35                                     struct v4l2_subdev_pad_config *cfg,
  36                                     struct v4l2_subdev_mbus_code_enum *code)
  37 {
  38         static const unsigned int codes[] = {
  39                 MEDIA_BUS_FMT_ARGB8888_1X32,
  40                 MEDIA_BUS_FMT_AYUV8_1X32,
  41         };
  42
  43         if (code->index >= ARRAY_SIZE(codes))
  44                 return -EINVAL;
  45
  46         code->code = codes[code->index];
  47
  48         return 0;
  49 }
  50
  51 static int vsp1_rwpf_enum_frame_size(struct v4l2_subdev *subdev,
  52                                      struct v4l2_subdev_pad_config *cfg,
  53                                      struct v4l2_subdev_frame_size_enum *fse)
  54 {
  55         struct vsp1_rwpf *rwpf = to_rwpf(subdev);
  56         struct v4l2_subdev_pad_config *config;
  57         struct v4l2_mbus_framefmt *format;
  58
  59         config = vsp1_entity_get_pad_config(&rwpf->entity, cfg, fse->which);
  60         if (!config)
  61                 return -EINVAL;
  62
  63         format = vsp1_entity_get_pad_format(&rwpf->entity, config, fse->pad);
  64
  65         if (fse->index || fse->code != format->code)
  66                 return -EINVAL;
  67
  68         if (fse->pad == RWPF_PAD_SINK) {
  69                 fse->min_width = RWPF_MIN_WIDTH;
  70                 fse->max_width = rwpf->max_width;
  71                 fse->min_height = RWPF_MIN_HEIGHT;
  72                 fse->max_height = rwpf->max_height;
  73         } else {
  74                 /* The size on the source pad are fixed and always identical to
  75                  * the size on the sink pad.
  76                  */
  77                 fse->min_width = format->width;
  78                 fse->max_width = format->width;
  79                 fse->min_height = format->height;
  80                 fse->max_height = format->height;
  81         }
  82
  83         return 0;
  84 }
  85
  86 static int vsp1_rwpf_get_format(struct v4l2_subdev *subdev,
  87                                 struct v4l2_subdev_pad_config *cfg,
  88                                 struct v4l2_subdev_format *fmt)
  89 {
  90         struct vsp1_rwpf *rwpf = to_rwpf(subdev);
  91         struct v4l2_subdev_pad_config *config;
  92
  93         config = vsp1_entity_get_pad_config(&rwpf->entity, cfg, fmt->which);
  94         if (!config)
  95                 return -EINVAL;
  96
  97         fmt->format = *vsp1_entity_get_pad_format(&rwpf->entity, config,
  98                                                   fmt->pad);
  99
 100         return 0;
 101 }
 102
 103 static int vsp1_rwpf_set_format(struct v4l2_subdev *subdev,
 104                                 struct v4l2_subdev_pad_config *cfg,
 105                                 struct v4l2_subdev_format *fmt)
 106 {
 107         struct vsp1_rwpf *rwpf = to_rwpf(subdev);
 108         struct v4l2_subdev_pad_config *config;
 109         struct v4l2_mbus_framefmt *format;
 110         struct v4l2_rect *crop;
 111
 112         config = vsp1_entity_get_pad_config(&rwpf->entity, cfg, fmt->which);
 113         if (!config)
 114                 return -EINVAL;
 115
 116         /* Default to YUV if the requested format is not supported. */
 117         if (fmt->format.code != MEDIA_BUS_FMT_ARGB8888_1X32 &&
 118             fmt->format.code != MEDIA_BUS_FMT_AYUV8_1X32)
 119                 fmt->format.code = MEDIA_BUS_FMT_AYUV8_1X32;
 120
 121         format = vsp1_entity_get_pad_format(&rwpf->entity, config, fmt->pad);
 122
 123         if (fmt->pad == RWPF_PAD_SOURCE) {
 124                 /* The RWPF performs format conversion but can't scale, only the
 125                  * format code can be changed on the source pad.
 126                  */
 127                 format->code = fmt->format.code;
 128                 fmt->format = *format;
 129                 return 0;
 130         }
 131
 132         format->code = fmt->format.code;
 133         format->width = clamp_t(unsigned int, fmt->format.width,
 134                                 RWPF_MIN_WIDTH, rwpf->max_width);
 135         format->height = clamp_t(unsigned int, fmt->format.height,
 136                                  RWPF_MIN_HEIGHT, rwpf->max_height);
 137         format->field = V4L2_FIELD_NONE;
 138         format->colorspace = V4L2_COLORSPACE_SRGB;
 139
 140         fmt->format = *format;
 141
 142         /* Update the sink crop rectangle. */
 143         crop = vsp1_rwpf_get_crop(rwpf, config);
 144         crop->left = 0;
 145         crop->top = 0;
 146         crop->width = fmt->format.width;
 147         crop->height = fmt->format.height;
 148
 149         /* Propagate the format to the source pad. */
 150         format = vsp1_entity_get_pad_format(&rwpf->entity, config,
 151                                             RWPF_PAD_SOURCE);
 152         *format = fmt->format;
 153
 154         return 0;
 155 }
 156
 157 static int vsp1_rwpf_get_selection(struct v4l2_subdev *subdev,
 158                                    struct v4l2_subdev_pad_config *cfg,
 159                                    struct v4l2_subdev_selection *sel)
 160 {
 161         struct vsp1_rwpf *rwpf = to_rwpf(subdev);
 162         struct v4l2_subdev_pad_config *config;
 163         struct v4l2_mbus_framefmt *format;
 164
 165         /* Cropping is implemented on the sink pad. */
 166         if (sel->pad != RWPF_PAD_SINK)
 167                 return -EINVAL;
 168
 169         config = vsp1_entity_get_pad_config(&rwpf->entity, cfg, sel->which);
 170         if (!config)
 171                 return -EINVAL;
 172
 173         switch (sel->target) {
 174         case V4L2_SEL_TGT_CROP:
 175                 sel->r = *vsp1_rwpf_get_crop(rwpf, config);
 176                 break;
 177
 178         case V4L2_SEL_TGT_CROP_BOUNDS:
 179                 format = vsp1_entity_get_pad_format(&rwpf->entity, config,
 180                                                     RWPF_PAD_SINK);
 181                 sel->r.left = 0;
 182                 sel->r.top = 0;
 183                 sel->r.width = format->width;
 184                 sel->r.height = format->height;
 185                 break;
 186
 187         default:
 188                 return -EINVAL;
 189         }
 190
 191         return 0;
 192 }
 193
 194 static int vsp1_rwpf_set_selection(struct v4l2_subdev *subdev,
 195                                    struct v4l2_subdev_pad_config *cfg,
 196                                    struct v4l2_subdev_selection *sel)
 197 {
 198         struct vsp1_rwpf *rwpf = to_rwpf(subdev);
 199         struct v4l2_subdev_pad_config *config;
 200         struct v4l2_mbus_framefmt *format;
 201         struct v4l2_rect *crop;
 202
 203         /* Cropping is implemented on the sink pad. */
 204         if (sel->pad != RWPF_PAD_SINK)
 205                 return -EINVAL;
 206
 207         if (sel->target != V4L2_SEL_TGT_CROP)
 208                 return -EINVAL;
 209
 210         config = vsp1_entity_get_pad_config(&rwpf->entity, cfg, sel->which);
 211         if (!config)
 212                 return -EINVAL;
 213
 214         /* Make sure the crop rectangle is entirely contained in the image. The
 215          * WPF top and left offsets are limited to 255.
 216          */
 217         format = vsp1_entity_get_pad_format(&rwpf->entity, config,
 218                                             RWPF_PAD_SINK);
 219
 220         /* Restrict the crop rectangle coordinates to multiples of 2 to avoid
 221          * shifting the color plane.
 222          */
 223         if (format->code == MEDIA_BUS_FMT_AYUV8_1X32) {
 224                 sel->r.left = ALIGN(sel->r.left, 2);
 225                 sel->r.top = ALIGN(sel->r.top, 2);
 226                 sel->r.width = round_down(sel->r.width, 2);
 227                 sel->r.height = round_down(sel->r.height, 2);
 228         }
 229
 230         sel->r.left = min_t(unsigned int, sel->r.left, format->width - 2);
 231         sel->r.top = min_t(unsigned int, sel->r.top, format->height - 2);
 232         if (rwpf->entity.type == VSP1_ENTITY_WPF) {
 233                 sel->r.left = min_t(unsigned int, sel->r.left, 255);
 234                 sel->r.top = min_t(unsigned int, sel->r.top, 255);
 235         }
 236         sel->r.width = min_t(unsigned int, sel->r.width,
 237                              format->width - sel->r.left);
 238         sel->r.height = min_t(unsigned int, sel->r.height,
 239                               format->height - sel->r.top);
 240
 241         crop = vsp1_rwpf_get_crop(rwpf, config);
 242         *crop = sel->r;
 243
 244         /* Propagate the format to the source pad. */
 245         format = vsp1_entity_get_pad_format(&rwpf->entity, config,
 246                                             RWPF_PAD_SOURCE);
 247         format->width = crop->width;
 248         format->height = crop->height;
 249
 250         return 0;
 251 }
 252
 253 const struct v4l2_subdev_pad_ops vsp1_rwpf_pad_ops = {
 254         .init_cfg = vsp1_entity_init_cfg,
 255         .enum_mbus_code = vsp1_rwpf_enum_mbus_code,
 256         .enum_frame_size = vsp1_rwpf_enum_frame_size,
 257         .get_fmt = vsp1_rwpf_get_format,
 258         .set_fmt = vsp1_rwpf_set_format,
 259         .get_selection = vsp1_rwpf_get_selection,
 260         .set_selection = vsp1_rwpf_set_selection,
 261 };
 262
 263 /* -----------------------------------------------------------------------------
 264  * Controls
 265  */
 266
 267 static int vsp1_rwpf_s_ctrl(struct v4l2_ctrl *ctrl)
 268 {
 269         struct vsp1_rwpf *rwpf =
 270                 container_of(ctrl->handler, struct vsp1_rwpf, ctrls);
 271
 272         switch (ctrl->id) {
 273         case V4L2_CID_ALPHA_COMPONENT:
 274                 rwpf->alpha = ctrl->val;
 275                 break;
 276         }
 277
 278         return 0;
 279 }
 280
 281 static const struct v4l2_ctrl_ops vsp1_rwpf_ctrl_ops = {
 282         .s_ctrl = vsp1_rwpf_s_ctrl,
 283 };
 284
 285 int vsp1_rwpf_init_ctrls(struct vsp1_rwpf *rwpf)
 286 {
 287         rwpf->alpha = 255;
 288
 289         v4l2_ctrl_handler_init(&rwpf->ctrls, 1);
 290         v4l2_ctrl_new_std(&rwpf->ctrls, &vsp1_rwpf_ctrl_ops,
 291                           V4L2_CID_ALPHA_COMPONENT, 0, 255, 1, 255);
 292
 293         rwpf->entity.subdev.ctrl_handler = &rwpf->ctrls;
 294
 295         return rwpf->ctrls.error;
 296 }