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_get_try_crop(&rwpf->entity.subdev, sd_state,
  23                                         RWPF_PAD_SINK);
  24 }
  25
  26 /* -----------------------------------------------------------------------------
  27  * V4L2 Subdevice Operations
  28  */
  29
  30 static int vsp1_rwpf_enum_mbus_code(struct v4l2_subdev *subdev,
  31                                     struct v4l2_subdev_state *sd_state,
  32                                     struct v4l2_subdev_mbus_code_enum *code)
  33 {
  34         static const unsigned int codes[] = {
  35                 MEDIA_BUS_FMT_ARGB8888_1X32,
  36                 MEDIA_BUS_FMT_AHSV8888_1X32,
  37                 MEDIA_BUS_FMT_AYUV8_1X32,
  38         };
  39
  40         if (code->index >= ARRAY_SIZE(codes))
  41                 return -EINVAL;
  42
  43         code->code = codes[code->index];
  44
  45         return 0;
  46 }
  47
  48 static int vsp1_rwpf_enum_frame_size(struct v4l2_subdev *subdev,
  49                                      struct v4l2_subdev_state *sd_state,
  50                                      struct v4l2_subdev_frame_size_enum *fse)
  51 {
  52         struct vsp1_rwpf *rwpf = to_rwpf(subdev);
  53
  54         return vsp1_subdev_enum_frame_size(subdev, sd_state, fse,
  55                                            RWPF_MIN_WIDTH,
  56                                            RWPF_MIN_HEIGHT, rwpf->max_width,
  57                                            rwpf->max_height);
  58 }
  59
  60 static int vsp1_rwpf_set_format(struct v4l2_subdev *subdev,
  61                                 struct v4l2_subdev_state *sd_state,
  62                                 struct v4l2_subdev_format *fmt)
  63 {
  64         struct vsp1_rwpf *rwpf = to_rwpf(subdev);
  65         struct v4l2_subdev_state *config;
  66         struct v4l2_mbus_framefmt *format;
  67         int ret = 0;
  68
  69         mutex_lock(&rwpf->entity.lock);
  70
  71         config = vsp1_entity_get_pad_config(&rwpf->entity, sd_state,
  72                                             fmt->which);
  73         if (!config) {
  74                 ret = -EINVAL;
  75                 goto done;
  76         }
  77
  78         /* Default to YUV if the requested format is not supported. */
  79         if (fmt->format.code != MEDIA_BUS_FMT_ARGB8888_1X32 &&
  80             fmt->format.code != MEDIA_BUS_FMT_AHSV8888_1X32 &&
  81             fmt->format.code != MEDIA_BUS_FMT_AYUV8_1X32)
  82                 fmt->format.code = MEDIA_BUS_FMT_AYUV8_1X32;
  83
  84         format = vsp1_entity_get_pad_format(&rwpf->entity, config, fmt->pad);
  85
  86         if (fmt->pad == RWPF_PAD_SOURCE) {
  87                 /*
  88                  * The RWPF performs format conversion but can't scale, only the
  89                  * format code can be changed on the source pad.
  90                  */
  91                 format->code = fmt->format.code;
  92                 fmt->format = *format;
  93                 goto done;
  94         }
  95
  96         format->code = fmt->format.code;
  97         format->width = clamp_t(unsigned int, fmt->format.width,
  98                                 RWPF_MIN_WIDTH, rwpf->max_width);
  99         format->height = clamp_t(unsigned int, fmt->format.height,
 100                                  RWPF_MIN_HEIGHT, rwpf->max_height);
 101         format->field = V4L2_FIELD_NONE;
 102         format->colorspace = V4L2_COLORSPACE_SRGB;
 103
 104         fmt->format = *format;
 105
 106         if (rwpf->entity.type == VSP1_ENTITY_RPF) {
 107                 struct v4l2_rect *crop;
 108
 109                 /* Update the sink crop rectangle. */
 110                 crop = vsp1_rwpf_get_crop(rwpf, config);
 111                 crop->left = 0;
 112                 crop->top = 0;
 113                 crop->width = fmt->format.width;
 114                 crop->height = fmt->format.height;
 115         }
 116
 117         /* Propagate the format to the source pad. */
 118         format = vsp1_entity_get_pad_format(&rwpf->entity, config,
 119                                             RWPF_PAD_SOURCE);
 120         *format = fmt->format;
 121
 122         if (rwpf->flip.rotate) {
 123                 format->width = fmt->format.height;
 124                 format->height = fmt->format.width;
 125         }
 126
 127 done:
 128         mutex_unlock(&rwpf->entity.lock);
 129         return ret;
 130 }
 131
 132 static int vsp1_rwpf_get_selection(struct v4l2_subdev *subdev,
 133                                    struct v4l2_subdev_state *sd_state,
 134                                    struct v4l2_subdev_selection *sel)
 135 {
 136         struct vsp1_rwpf *rwpf = to_rwpf(subdev);
 137         struct v4l2_subdev_state *config;
 138         struct v4l2_mbus_framefmt *format;
 139         int ret = 0;
 140
 141         /*
 142          * Cropping is only supported on the RPF and is implemented on the sink
 143          * pad.
 144          */
 145         if (rwpf->entity.type == VSP1_ENTITY_WPF || sel->pad != RWPF_PAD_SINK)
 146                 return -EINVAL;
 147
 148         mutex_lock(&rwpf->entity.lock);
 149
 150         config = vsp1_entity_get_pad_config(&rwpf->entity, sd_state,
 151                                             sel->which);
 152         if (!config) {
 153                 ret = -EINVAL;
 154                 goto done;
 155         }
 156
 157         switch (sel->target) {
 158         case V4L2_SEL_TGT_CROP:
 159                 sel->r = *vsp1_rwpf_get_crop(rwpf, config);
 160                 break;
 161
 162         case V4L2_SEL_TGT_CROP_BOUNDS:
 163                 format = vsp1_entity_get_pad_format(&rwpf->entity, config,
 164                                                     RWPF_PAD_SINK);
 165                 sel->r.left = 0;
 166                 sel->r.top = 0;
 167                 sel->r.width = format->width;
 168                 sel->r.height = format->height;
 169                 break;
 170
 171         default:
 172                 ret = -EINVAL;
 173                 break;
 174         }
 175
 176 done:
 177         mutex_unlock(&rwpf->entity.lock);
 178         return ret;
 179 }
 180
 181 static int vsp1_rwpf_set_selection(struct v4l2_subdev *subdev,
 182                                    struct v4l2_subdev_state *sd_state,
 183                                    struct v4l2_subdev_selection *sel)
 184 {
 185         struct vsp1_rwpf *rwpf = to_rwpf(subdev);
 186         struct v4l2_subdev_state *config;
 187         struct v4l2_mbus_framefmt *format;
 188         struct v4l2_rect *crop;
 189         int ret = 0;
 190
 191         /*
 192          * Cropping is only supported on the RPF and is implemented on the sink
 193          * pad.
 194          */
 195         if (rwpf->entity.type == VSP1_ENTITY_WPF || sel->pad != RWPF_PAD_SINK)
 196                 return -EINVAL;
 197
 198         if (sel->target != V4L2_SEL_TGT_CROP)
 199                 return -EINVAL;
 200
 201         mutex_lock(&rwpf->entity.lock);
 202
 203         config = vsp1_entity_get_pad_config(&rwpf->entity, sd_state,
 204                                             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 static 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 const struct v4l2_subdev_ops vsp1_rwpf_subdev_ops = {
 257         .pad    = &vsp1_rwpf_pad_ops,
 258 };
 259
 260 /* -----------------------------------------------------------------------------
 261  * Controls
 262  */
 263
 264 static int vsp1_rwpf_s_ctrl(struct v4l2_ctrl *ctrl)
 265 {
 266         struct vsp1_rwpf *rwpf =
 267                 container_of(ctrl->handler, struct vsp1_rwpf, ctrls);
 268
 269         switch (ctrl->id) {
 270         case V4L2_CID_ALPHA_COMPONENT:
 271                 rwpf->alpha = ctrl->val;
 272                 break;
 273         }
 274
 275         return 0;
 276 }
 277
 278 static const struct v4l2_ctrl_ops vsp1_rwpf_ctrl_ops = {
 279         .s_ctrl = vsp1_rwpf_s_ctrl,
 280 };
 281
 282 int vsp1_rwpf_init_ctrls(struct vsp1_rwpf *rwpf, unsigned int ncontrols)
 283 {
 284         v4l2_ctrl_handler_init(&rwpf->ctrls, ncontrols + 1);
 285         v4l2_ctrl_new_std(&rwpf->ctrls, &vsp1_rwpf_ctrl_ops,
 286                           V4L2_CID_ALPHA_COMPONENT, 0, 255, 1, 255);
 287
 288         rwpf->entity.subdev.ctrl_handler = &rwpf->ctrls;
 289
 290         return rwpf->ctrls.error;
 291 }