drivers/media/platform/renesas/vsp1/vsp1_rwpf.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * vsp1_rwpf.c  --  R-Car VSP1 Read and Write Pixel Formatters
   4  *
   5  * Copyright (C) 2013-2014 Renesas Electronics Corporation
   6  *
   7  * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
   8  */
   9
  10 #include <media/v4l2-subdev.h>
  11
  12 #include "vsp1.h"
  13 #include "vsp1_rwpf.h"
  14 #include "vsp1_video.h"
  15
  16 #define RWPF_MIN_WIDTH                          1
  17 #define RWPF_MIN_HEIGHT                         1
  18
  19 struct v4l2_rect *vsp1_rwpf_get_crop(struct vsp1_rwpf *rwpf,
  20                                      struct v4l2_subdev_state *sd_state)
  21 {
  22         return v4l2_subdev_state_get_crop(sd_state, RWPF_PAD_SINK);
  23 }
  24
  25 /* -----------------------------------------------------------------------------
  26  * V4L2 Subdevice Operations
  27  */
  28
  29 static int vsp1_rwpf_enum_mbus_code(struct v4l2_subdev *subdev,
  30                                     struct v4l2_subdev_state *sd_state,
  31                                     struct v4l2_subdev_mbus_code_enum *code)
  32 {
  33         static const unsigned int codes[] = {
  34                 MEDIA_BUS_FMT_ARGB8888_1X32,
  35                 MEDIA_BUS_FMT_AHSV8888_1X32,
  36                 MEDIA_BUS_FMT_AYUV8_1X32,
  37         };
  38
  39         if (code->index >= ARRAY_SIZE(codes))
  40                 return -EINVAL;
  41
  42         code->code = codes[code->index];
  43
  44         return 0;
  45 }
  46
  47 static int vsp1_rwpf_enum_frame_size(struct v4l2_subdev *subdev,
  48                                      struct v4l2_subdev_state *sd_state,
  49                                      struct v4l2_subdev_frame_size_enum *fse)
  50 {
  51         struct vsp1_rwpf *rwpf = to_rwpf(subdev);
  52
  53         return vsp1_subdev_enum_frame_size(subdev, sd_state, fse,
  54                                            RWPF_MIN_WIDTH,
  55                                            RWPF_MIN_HEIGHT, rwpf->max_width,
  56                                            rwpf->max_height);
  57 }
  58
  59 static int vsp1_rwpf_set_format(struct v4l2_subdev *subdev,
  60                                 struct v4l2_subdev_state *sd_state,
  61                                 struct v4l2_subdev_format *fmt)
  62 {
  63         struct vsp1_rwpf *rwpf = to_rwpf(subdev);
  64         struct v4l2_subdev_state *state;
  65         struct v4l2_mbus_framefmt *format;
  66         int ret = 0;
  67
  68         mutex_lock(&rwpf->entity.lock);
  69
  70         state = vsp1_entity_get_state(&rwpf->entity, sd_state, fmt->which);
  71         if (!state) {
  72                 ret = -EINVAL;
  73                 goto done;
  74         }
  75
  76         /* Default to YUV if the requested format is not supported. */
  77         if (fmt->format.code != MEDIA_BUS_FMT_ARGB8888_1X32 &&
  78             fmt->format.code != MEDIA_BUS_FMT_AHSV8888_1X32 &&
  79             fmt->format.code != MEDIA_BUS_FMT_AYUV8_1X32)
  80                 fmt->format.code = MEDIA_BUS_FMT_AYUV8_1X32;
  81
  82         format = vsp1_entity_get_pad_format(&rwpf->entity, state, fmt->pad);
  83
  84         if (fmt->pad == RWPF_PAD_SOURCE) {
  85                 /*
  86                  * The RWPF performs format conversion but can't scale, only the
  87                  * format code can be changed on the source pad.
  88                  */
  89                 format->code = fmt->format.code;
  90                 fmt->format = *format;
  91                 goto done;
  92         }
  93
  94         format->code = fmt->format.code;
  95         format->width = clamp_t(unsigned int, fmt->format.width,
  96                                 RWPF_MIN_WIDTH, rwpf->max_width);
  97         format->height = clamp_t(unsigned int, fmt->format.height,
  98                                  RWPF_MIN_HEIGHT, rwpf->max_height);
  99         format->field = V4L2_FIELD_NONE;
 100         format->colorspace = V4L2_COLORSPACE_SRGB;
 101
 102         fmt->format = *format;
 103
 104         if (rwpf->entity.type == VSP1_ENTITY_RPF) {
 105                 struct v4l2_rect *crop;
 106
 107                 /* Update the sink crop rectangle. */
 108                 crop = vsp1_rwpf_get_crop(rwpf, state);
 109                 crop->left = 0;
 110                 crop->top = 0;
 111                 crop->width = fmt->format.width;
 112                 crop->height = fmt->format.height;
 113         }
 114
 115         /* Propagate the format to the source pad. */
 116         format = vsp1_entity_get_pad_format(&rwpf->entity, state,
 117                                             RWPF_PAD_SOURCE);
 118         *format = fmt->format;
 119
 120         if (rwpf->flip.rotate) {
 121                 format->width = fmt->format.height;
 122                 format->height = fmt->format.width;
 123         }
 124
 125 done:
 126         mutex_unlock(&rwpf->entity.lock);
 127         return ret;
 128 }
 129
 130 static int vsp1_rwpf_get_selection(struct v4l2_subdev *subdev,
 131                                    struct v4l2_subdev_state *sd_state,
 132                                    struct v4l2_subdev_selection *sel)
 133 {
 134         struct vsp1_rwpf *rwpf = to_rwpf(subdev);
 135         struct v4l2_subdev_state *state;
 136         struct v4l2_mbus_framefmt *format;
 137         int ret = 0;
 138
 139         /*
 140          * Cropping is only supported on the RPF and is implemented on the sink
 141          * pad.
 142          */
 143         if (rwpf->entity.type == VSP1_ENTITY_WPF || sel->pad != RWPF_PAD_SINK)
 144                 return -EINVAL;
 145
 146         mutex_lock(&rwpf->entity.lock);
 147
 148         state = vsp1_entity_get_state(&rwpf->entity, sd_state, sel->which);
 149         if (!state) {
 150                 ret = -EINVAL;
 151                 goto done;
 152         }
 153
 154         switch (sel->target) {
 155         case V4L2_SEL_TGT_CROP:
 156                 sel->r = *vsp1_rwpf_get_crop(rwpf, state);
 157                 break;
 158
 159         case V4L2_SEL_TGT_CROP_BOUNDS:
 160                 format = vsp1_entity_get_pad_format(&rwpf->entity, state,
 161                                                     RWPF_PAD_SINK);
 162                 sel->r.left = 0;
 163                 sel->r.top = 0;
 164                 sel->r.width = format->width;
 165                 sel->r.height = format->height;
 166                 break;
 167
 168         default:
 169                 ret = -EINVAL;
 170                 break;
 171         }
 172
 173 done:
 174         mutex_unlock(&rwpf->entity.lock);
 175         return ret;
 176 }
 177
 178 static int vsp1_rwpf_set_selection(struct v4l2_subdev *subdev,
 179                                    struct v4l2_subdev_state *sd_state,
 180                                    struct v4l2_subdev_selection *sel)
 181 {
 182         struct vsp1_rwpf *rwpf = to_rwpf(subdev);
 183         struct v4l2_subdev_state *state;
 184         struct v4l2_mbus_framefmt *format;
 185         struct v4l2_rect *crop;
 186         int ret = 0;
 187
 188         /*
 189          * Cropping is only supported on the RPF and is implemented on the sink
 190          * pad.
 191          */
 192         if (rwpf->entity.type == VSP1_ENTITY_WPF || sel->pad != RWPF_PAD_SINK)
 193                 return -EINVAL;
 194
 195         if (sel->target != V4L2_SEL_TGT_CROP)
 196                 return -EINVAL;
 197
 198         mutex_lock(&rwpf->entity.lock);
 199
 200         state = vsp1_entity_get_state(&rwpf->entity, sd_state, sel->which);
 201         if (!state) {
 202                 ret = -EINVAL;
 203                 goto done;
 204         }
 205
 206         /* Make sure the crop rectangle is entirely contained in the image. */
 207         format = vsp1_entity_get_pad_format(&rwpf->entity, state,
 208                                             RWPF_PAD_SINK);
 209
 210         /*
 211          * Restrict the crop rectangle coordinates to multiples of 2 to avoid
 212          * shifting the color plane.
 213          */
 214         if (format->code == MEDIA_BUS_FMT_AYUV8_1X32) {
 215                 sel->r.left = ALIGN(sel->r.left, 2);
 216                 sel->r.top = ALIGN(sel->r.top, 2);
 217                 sel->r.width = round_down(sel->r.width, 2);
 218                 sel->r.height = round_down(sel->r.height, 2);
 219         }
 220
 221         sel->r.left = min_t(unsigned int, sel->r.left, format->width - 2);
 222         sel->r.top = min_t(unsigned int, sel->r.top, format->height - 2);
 223         sel->r.width = min_t(unsigned int, sel->r.width,
 224                              format->width - sel->r.left);
 225         sel->r.height = min_t(unsigned int, sel->r.height,
 226                               format->height - sel->r.top);
 227
 228         crop = vsp1_rwpf_get_crop(rwpf, state);
 229         *crop = sel->r;
 230
 231         /* Propagate the format to the source pad. */
 232         format = vsp1_entity_get_pad_format(&rwpf->entity, state,
 233                                             RWPF_PAD_SOURCE);
 234         format->width = crop->width;
 235         format->height = crop->height;
 236
 237 done:
 238         mutex_unlock(&rwpf->entity.lock);
 239         return ret;
 240 }
 241
 242 static const struct v4l2_subdev_pad_ops vsp1_rwpf_pad_ops = {
 243         .init_cfg = vsp1_entity_init_cfg,
 244         .enum_mbus_code = vsp1_rwpf_enum_mbus_code,
 245         .enum_frame_size = vsp1_rwpf_enum_frame_size,
 246         .get_fmt = vsp1_subdev_get_pad_format,
 247         .set_fmt = vsp1_rwpf_set_format,
 248         .get_selection = vsp1_rwpf_get_selection,
 249         .set_selection = vsp1_rwpf_set_selection,
 250 };
 251
 252 const struct v4l2_subdev_ops vsp1_rwpf_subdev_ops = {
 253         .pad    = &vsp1_rwpf_pad_ops,
 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 }