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_AHSV8888_1X32,
  41                 MEDIA_BUS_FMT_AYUV8_1X32,
  42         };
  43
  44         if (code->index >= ARRAY_SIZE(codes))
  45                 return -EINVAL;
  46
  47         code->code = codes[code->index];
  48
  49         return 0;
  50 }
  51
  52 static int vsp1_rwpf_enum_frame_size(struct v4l2_subdev *subdev,
  53                                      struct v4l2_subdev_pad_config *cfg,
  54                                      struct v4l2_subdev_frame_size_enum *fse)
  55 {
  56         struct vsp1_rwpf *rwpf = to_rwpf(subdev);
  57
  58         return vsp1_subdev_enum_frame_size(subdev, cfg, fse, RWPF_MIN_WIDTH,
  59                                            RWPF_MIN_HEIGHT, rwpf->max_width,
  60                                            rwpf->max_height);
  61 }
  62
  63 static int vsp1_rwpf_set_format(struct v4l2_subdev *subdev,
  64                                 struct v4l2_subdev_pad_config *cfg,
  65                                 struct v4l2_subdev_format *fmt)
  66 {
  67         struct vsp1_rwpf *rwpf = to_rwpf(subdev);
  68         struct v4l2_subdev_pad_config *config;
  69         struct v4l2_mbus_framefmt *format;
  70         int ret = 0;
  71
  72         mutex_lock(&rwpf->entity.lock);
  73
  74         config = vsp1_entity_get_pad_config(&rwpf->entity, cfg, fmt->which);
  75         if (!config) {
  76                 ret = -EINVAL;
  77                 goto done;
  78         }
  79
  80         /* Default to YUV if the requested format is not supported. */
  81         if (fmt->format.code != MEDIA_BUS_FMT_ARGB8888_1X32 &&
  82             fmt->format.code != MEDIA_BUS_FMT_AHSV8888_1X32 &&
  83             fmt->format.code != MEDIA_BUS_FMT_AYUV8_1X32)
  84                 fmt->format.code = MEDIA_BUS_FMT_AYUV8_1X32;
  85
  86         format = vsp1_entity_get_pad_format(&rwpf->entity, config, fmt->pad);
  87
  88         if (fmt->pad == RWPF_PAD_SOURCE) {
  89                 /*
  90                  * The RWPF performs format conversion but can't scale, only the
  91                  * format code can be changed on the source pad.
  92                  */
  93                 format->code = fmt->format.code;
  94                 fmt->format = *format;
  95                 goto done;
  96         }
  97
  98         format->code = fmt->format.code;
  99         format->width = clamp_t(unsigned int, fmt->format.width,
 100                                 RWPF_MIN_WIDTH, rwpf->max_width);
 101         format->height = clamp_t(unsigned int, fmt->format.height,
 102                                  RWPF_MIN_HEIGHT, rwpf->max_height);
 103         format->field = V4L2_FIELD_NONE;
 104         format->colorspace = V4L2_COLORSPACE_SRGB;
 105
 106         fmt->format = *format;
 107
 108         if (rwpf->entity.type == VSP1_ENTITY_RPF) {
 109                 struct v4l2_rect *crop;
 110
 111                 /* Update the sink crop rectangle. */
 112                 crop = vsp1_rwpf_get_crop(rwpf, config);
 113                 crop->left = 0;
 114                 crop->top = 0;
 115                 crop->width = fmt->format.width;
 116                 crop->height = fmt->format.height;
 117         }
 118
 119         /* Propagate the format to the source pad. */
 120         format = vsp1_entity_get_pad_format(&rwpf->entity, config,
 121                                             RWPF_PAD_SOURCE);
 122         *format = fmt->format;
 123
 124         if (rwpf->flip.rotate) {
 125                 format->width = fmt->format.height;
 126                 format->height = fmt->format.width;
 127         }
 128
 129 done:
 130         mutex_unlock(&rwpf->entity.lock);
 131         return ret;
 132 }
 133
 134 static int vsp1_rwpf_get_selection(struct v4l2_subdev *subdev,
 135                                    struct v4l2_subdev_pad_config *cfg,
 136                                    struct v4l2_subdev_selection *sel)
 137 {
 138         struct vsp1_rwpf *rwpf = to_rwpf(subdev);
 139         struct v4l2_subdev_pad_config *config;
 140         struct v4l2_mbus_framefmt *format;
 141         int ret = 0;
 142
 143         /*
 144          * Cropping is only supported on the RPF and is implemented on the sink
 145          * pad.
 146          */
 147         if (rwpf->entity.type == VSP1_ENTITY_WPF || sel->pad != RWPF_PAD_SINK)
 148                 return -EINVAL;
 149
 150         mutex_lock(&rwpf->entity.lock);
 151
 152         config = vsp1_entity_get_pad_config(&rwpf->entity, cfg, sel->which);
 153         if (!config) {
 154                 ret = -EINVAL;
 155                 goto done;
 156         }
 157
 158         switch (sel->target) {
 159         case V4L2_SEL_TGT_CROP:
 160                 sel->r = *vsp1_rwpf_get_crop(rwpf, config);
 161                 break;
 162
 163         case V4L2_SEL_TGT_CROP_BOUNDS:
 164                 format = vsp1_entity_get_pad_format(&rwpf->entity, config,
 165                                                     RWPF_PAD_SINK);
 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                 ret = -EINVAL;
 174                 break;
 175         }
 176
 177 done:
 178         mutex_unlock(&rwpf->entity.lock);
 179         return ret;
 180 }
 181
 182 static int vsp1_rwpf_set_selection(struct v4l2_subdev *subdev,
 183                                    struct v4l2_subdev_pad_config *cfg,
 184                                    struct v4l2_subdev_selection *sel)
 185 {
 186         struct vsp1_rwpf *rwpf = to_rwpf(subdev);
 187         struct v4l2_subdev_pad_config *config;
 188         struct v4l2_mbus_framefmt *format;
 189         struct v4l2_rect *crop;
 190         int ret = 0;
 191
 192         /*
 193          * Cropping is only supported on the RPF and is implemented on the sink
 194          * pad.
 195          */
 196         if (rwpf->entity.type == VSP1_ENTITY_WPF || sel->pad != RWPF_PAD_SINK)
 197                 return -EINVAL;
 198
 199         if (sel->target != V4L2_SEL_TGT_CROP)
 200                 return -EINVAL;
 201
 202         mutex_lock(&rwpf->entity.lock);
 203
 204         config = vsp1_entity_get_pad_config(&rwpf->entity, cfg, sel->which);
 205         if (!config) {
 206                 ret = -EINVAL;
 207                 goto done;
 208         }
 209
 210         /* Make sure the crop rectangle is entirely contained in the image. */
 211         format = vsp1_entity_get_pad_format(&rwpf->entity, config,
 212                                             RWPF_PAD_SINK);
 213
 214         /*
 215          * Restrict the crop rectangle coordinates to multiples of 2 to avoid
 216          * shifting the color plane.
 217          */
 218         if (format->code == MEDIA_BUS_FMT_AYUV8_1X32) {
 219                 sel->r.left = ALIGN(sel->r.left, 2);
 220                 sel->r.top = ALIGN(sel->r.top, 2);
 221                 sel->r.width = round_down(sel->r.width, 2);
 222                 sel->r.height = round_down(sel->r.height, 2);
 223         }
 224
 225         sel->r.left = min_t(unsigned int, sel->r.left, format->width - 2);
 226         sel->r.top = min_t(unsigned int, sel->r.top, format->height - 2);
 227         sel->r.width = min_t(unsigned int, sel->r.width,
 228                              format->width - sel->r.left);
 229         sel->r.height = min_t(unsigned int, sel->r.height,
 230                               format->height - sel->r.top);
 231
 232         crop = vsp1_rwpf_get_crop(rwpf, config);
 233         *crop = sel->r;
 234
 235         /* Propagate the format to the source pad. */
 236         format = vsp1_entity_get_pad_format(&rwpf->entity, config,
 237                                             RWPF_PAD_SOURCE);
 238         format->width = crop->width;
 239         format->height = crop->height;
 240
 241 done:
 242         mutex_unlock(&rwpf->entity.lock);
 243         return ret;
 244 }
 245
 246 const struct v4l2_subdev_pad_ops vsp1_rwpf_pad_ops = {
 247         .init_cfg = vsp1_entity_init_cfg,
 248         .enum_mbus_code = vsp1_rwpf_enum_mbus_code,
 249         .enum_frame_size = vsp1_rwpf_enum_frame_size,
 250         .get_fmt = vsp1_subdev_get_pad_format,
 251         .set_fmt = vsp1_rwpf_set_format,
 252         .get_selection = vsp1_rwpf_get_selection,
 253         .set_selection = vsp1_rwpf_set_selection,
 254 };
 255
 256 /* -----------------------------------------------------------------------------
 257  * Controls
 258  */
 259
 260 static int vsp1_rwpf_s_ctrl(struct v4l2_ctrl *ctrl)
 261 {
 262         struct vsp1_rwpf *rwpf =
 263                 container_of(ctrl->handler, struct vsp1_rwpf, ctrls);
 264
 265         switch (ctrl->id) {
 266         case V4L2_CID_ALPHA_COMPONENT:
 267                 rwpf->alpha = ctrl->val;
 268                 break;
 269         }
 270
 271         return 0;
 272 }
 273
 274 static const struct v4l2_ctrl_ops vsp1_rwpf_ctrl_ops = {
 275         .s_ctrl = vsp1_rwpf_s_ctrl,
 276 };
 277
 278 int vsp1_rwpf_init_ctrls(struct vsp1_rwpf *rwpf, unsigned int ncontrols)
 279 {
 280         v4l2_ctrl_handler_init(&rwpf->ctrls, ncontrols + 1);
 281         v4l2_ctrl_new_std(&rwpf->ctrls, &vsp1_rwpf_ctrl_ops,
 282                           V4L2_CID_ALPHA_COMPONENT, 0, 255, 1, 255);
 283
 284         rwpf->entity.subdev.ctrl_handler = &rwpf->ctrls;
 285
 286         return rwpf->ctrls.error;
 287 }