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_set_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         struct v4l2_mbus_framefmt *format;
  93         struct v4l2_rect *crop;
  94
  95         config = vsp1_entity_get_pad_config(&rwpf->entity, cfg, fmt->which);
  96         if (!config)
  97                 return -EINVAL;
  98
  99         /* Default to YUV if the requested format is not supported. */
 100         if (fmt->format.code != MEDIA_BUS_FMT_ARGB8888_1X32 &&
 101             fmt->format.code != MEDIA_BUS_FMT_AYUV8_1X32)
 102                 fmt->format.code = MEDIA_BUS_FMT_AYUV8_1X32;
 103
 104         format = vsp1_entity_get_pad_format(&rwpf->entity, config, fmt->pad);
 105
 106         if (fmt->pad == RWPF_PAD_SOURCE) {
 107                 /* The RWPF performs format conversion but can't scale, only the
 108                  * format code can be changed on the source pad.
 109                  */
 110                 format->code = fmt->format.code;
 111                 fmt->format = *format;
 112                 return 0;
 113         }
 114
 115         format->code = fmt->format.code;
 116         format->width = clamp_t(unsigned int, fmt->format.width,
 117                                 RWPF_MIN_WIDTH, rwpf->max_width);
 118         format->height = clamp_t(unsigned int, fmt->format.height,
 119                                  RWPF_MIN_HEIGHT, rwpf->max_height);
 120         format->field = V4L2_FIELD_NONE;
 121         format->colorspace = V4L2_COLORSPACE_SRGB;
 122
 123         fmt->format = *format;
 124
 125         /* Update the sink crop rectangle. */
 126         crop = vsp1_rwpf_get_crop(rwpf, config);
 127         crop->left = 0;
 128         crop->top = 0;
 129         crop->width = fmt->format.width;
 130         crop->height = fmt->format.height;
 131
 132         /* Propagate the format to the source pad. */
 133         format = vsp1_entity_get_pad_format(&rwpf->entity, config,
 134                                             RWPF_PAD_SOURCE);
 135         *format = fmt->format;
 136
 137         return 0;
 138 }
 139
 140 static int vsp1_rwpf_get_selection(struct v4l2_subdev *subdev,
 141                                    struct v4l2_subdev_pad_config *cfg,
 142                                    struct v4l2_subdev_selection *sel)
 143 {
 144         struct vsp1_rwpf *rwpf = to_rwpf(subdev);
 145         struct v4l2_subdev_pad_config *config;
 146         struct v4l2_mbus_framefmt *format;
 147
 148         /* Cropping is implemented on the sink pad. */
 149         if (sel->pad != RWPF_PAD_SINK)
 150                 return -EINVAL;
 151
 152         config = vsp1_entity_get_pad_config(&rwpf->entity, cfg, sel->which);
 153         if (!config)
 154                 return -EINVAL;
 155
 156         switch (sel->target) {
 157         case V4L2_SEL_TGT_CROP:
 158                 sel->r = *vsp1_rwpf_get_crop(rwpf, config);
 159                 break;
 160
 161         case V4L2_SEL_TGT_CROP_BOUNDS:
 162                 format = vsp1_entity_get_pad_format(&rwpf->entity, config,
 163                                                     RWPF_PAD_SINK);
 164                 sel->r.left = 0;
 165                 sel->r.top = 0;
 166                 sel->r.width = format->width;
 167                 sel->r.height = format->height;
 168                 break;
 169
 170         default:
 171                 return -EINVAL;
 172         }
 173
 174         return 0;
 175 }
 176
 177 static int vsp1_rwpf_set_selection(struct v4l2_subdev *subdev,
 178                                    struct v4l2_subdev_pad_config *cfg,
 179                                    struct v4l2_subdev_selection *sel)
 180 {
 181         struct vsp1_rwpf *rwpf = to_rwpf(subdev);
 182         struct v4l2_subdev_pad_config *config;
 183         struct v4l2_mbus_framefmt *format;
 184         struct v4l2_rect *crop;
 185
 186         /* Cropping is implemented on the sink pad. */
 187         if (sel->pad != RWPF_PAD_SINK)
 188                 return -EINVAL;
 189
 190         if (sel->target != V4L2_SEL_TGT_CROP)
 191                 return -EINVAL;
 192
 193         config = vsp1_entity_get_pad_config(&rwpf->entity, cfg, sel->which);
 194         if (!config)
 195                 return -EINVAL;
 196
 197         /* Make sure the crop rectangle is entirely contained in the image. The
 198          * WPF top and left offsets are limited to 255.
 199          */
 200         format = vsp1_entity_get_pad_format(&rwpf->entity, config,
 201                                             RWPF_PAD_SINK);
 202
 203         /* Restrict the crop rectangle coordinates to multiples of 2 to avoid
 204          * shifting the color plane.
 205          */
 206         if (format->code == MEDIA_BUS_FMT_AYUV8_1X32) {
 207                 sel->r.left = ALIGN(sel->r.left, 2);
 208                 sel->r.top = ALIGN(sel->r.top, 2);
 209                 sel->r.width = round_down(sel->r.width, 2);
 210                 sel->r.height = round_down(sel->r.height, 2);
 211         }
 212
 213         sel->r.left = min_t(unsigned int, sel->r.left, format->width - 2);
 214         sel->r.top = min_t(unsigned int, sel->r.top, format->height - 2);
 215         if (rwpf->entity.type == VSP1_ENTITY_WPF) {
 216                 sel->r.left = min_t(unsigned int, sel->r.left, 255);
 217                 sel->r.top = min_t(unsigned int, sel->r.top, 255);
 218         }
 219         sel->r.width = min_t(unsigned int, sel->r.width,
 220                              format->width - sel->r.left);
 221         sel->r.height = min_t(unsigned int, sel->r.height,
 222                               format->height - sel->r.top);
 223
 224         crop = vsp1_rwpf_get_crop(rwpf, config);
 225         *crop = sel->r;
 226
 227         /* Propagate the format to the source pad. */
 228         format = vsp1_entity_get_pad_format(&rwpf->entity, config,
 229                                             RWPF_PAD_SOURCE);
 230         format->width = crop->width;
 231         format->height = crop->height;
 232
 233         return 0;
 234 }
 235
 236 const struct v4l2_subdev_pad_ops vsp1_rwpf_pad_ops = {
 237         .init_cfg = vsp1_entity_init_cfg,
 238         .enum_mbus_code = vsp1_rwpf_enum_mbus_code,
 239         .enum_frame_size = vsp1_rwpf_enum_frame_size,
 240         .get_fmt = vsp1_subdev_get_pad_format,
 241         .set_fmt = vsp1_rwpf_set_format,
 242         .get_selection = vsp1_rwpf_get_selection,
 243         .set_selection = vsp1_rwpf_set_selection,
 244 };
 245
 246 /* -----------------------------------------------------------------------------
 247  * Controls
 248  */
 249
 250 static int vsp1_rwpf_s_ctrl(struct v4l2_ctrl *ctrl)
 251 {
 252         struct vsp1_rwpf *rwpf =
 253                 container_of(ctrl->handler, struct vsp1_rwpf, ctrls);
 254
 255         switch (ctrl->id) {
 256         case V4L2_CID_ALPHA_COMPONENT:
 257                 rwpf->alpha = ctrl->val;
 258                 break;
 259         }
 260
 261         return 0;
 262 }
 263
 264 static const struct v4l2_ctrl_ops vsp1_rwpf_ctrl_ops = {
 265         .s_ctrl = vsp1_rwpf_s_ctrl,
 266 };
 267
 268 int vsp1_rwpf_init_ctrls(struct vsp1_rwpf *rwpf)
 269 {
 270         rwpf->alpha = 255;
 271
 272         v4l2_ctrl_handler_init(&rwpf->ctrls, 1);
 273         v4l2_ctrl_new_std(&rwpf->ctrls, &vsp1_rwpf_ctrl_ops,
 274                           V4L2_CID_ALPHA_COMPONENT, 0, 255, 1, 255);
 275
 276         rwpf->entity.subdev.ctrl_handler = &rwpf->ctrls;
 277
 278         return rwpf->ctrls.error;
 279 }