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
  57         return vsp1_subdev_enum_frame_size(subdev, cfg, fse, RWPF_MIN_WIDTH,
  58                                            RWPF_MIN_HEIGHT, rwpf->max_width,
  59                                            rwpf->max_height);
  60 }
  61
  62 static int vsp1_rwpf_set_format(struct v4l2_subdev *subdev,
  63                                 struct v4l2_subdev_pad_config *cfg,
  64                                 struct v4l2_subdev_format *fmt)
  65 {
  66         struct vsp1_rwpf *rwpf = to_rwpf(subdev);
  67         struct v4l2_subdev_pad_config *config;
  68         struct v4l2_mbus_framefmt *format;
  69         int ret = 0;
  70
  71         mutex_lock(&rwpf->entity.lock);
  72
  73         config = vsp1_entity_get_pad_config(&rwpf->entity, cfg, fmt->which);
  74         if (!config) {
  75                 ret = -EINVAL;
  76                 goto done;
  77         }
  78
  79         /* Default to YUV if the requested format is not supported. */
  80         if (fmt->format.code != MEDIA_BUS_FMT_ARGB8888_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                 /* The RWPF performs format conversion but can't scale, only the
  88                  * format code can be changed on the source pad.
  89                  */
  90                 format->code = fmt->format.code;
  91                 fmt->format = *format;
  92                 goto done;
  93         }
  94
  95         format->code = fmt->format.code;
  96         format->width = clamp_t(unsigned int, fmt->format.width,
  97                                 RWPF_MIN_WIDTH, rwpf->max_width);
  98         format->height = clamp_t(unsigned int, fmt->format.height,
  99                                  RWPF_MIN_HEIGHT, rwpf->max_height);
 100         format->field = V4L2_FIELD_NONE;
 101         format->colorspace = V4L2_COLORSPACE_SRGB;
 102
 103         fmt->format = *format;
 104
 105         if (rwpf->entity.type == VSP1_ENTITY_RPF) {
 106                 struct v4l2_rect *crop;
 107
 108                 /* Update the sink crop rectangle. */
 109                 crop = vsp1_rwpf_get_crop(rwpf, config);
 110                 crop->left = 0;
 111                 crop->top = 0;
 112                 crop->width = fmt->format.width;
 113                 crop->height = fmt->format.height;
 114         }
 115
 116         /* Propagate the format to the source pad. */
 117         format = vsp1_entity_get_pad_format(&rwpf->entity, config,
 118                                             RWPF_PAD_SOURCE);
 119         *format = fmt->format;
 120
 121 done:
 122         mutex_unlock(&rwpf->entity.lock);
 123         return ret;
 124 }
 125
 126 static int vsp1_rwpf_get_selection(struct v4l2_subdev *subdev,
 127                                    struct v4l2_subdev_pad_config *cfg,
 128                                    struct v4l2_subdev_selection *sel)
 129 {
 130         struct vsp1_rwpf *rwpf = to_rwpf(subdev);
 131         struct v4l2_subdev_pad_config *config;
 132         struct v4l2_mbus_framefmt *format;
 133         int ret = 0;
 134
 135         /*
 136          * Cropping is only supported on the RPF and is implemented on the sink
 137          * pad.
 138          */
 139         if (rwpf->entity.type == VSP1_ENTITY_WPF || sel->pad != RWPF_PAD_SINK)
 140                 return -EINVAL;
 141
 142         mutex_lock(&rwpf->entity.lock);
 143
 144         config = vsp1_entity_get_pad_config(&rwpf->entity, cfg, sel->which);
 145         if (!config) {
 146                 ret = -EINVAL;
 147                 goto done;
 148         }
 149
 150         switch (sel->target) {
 151         case V4L2_SEL_TGT_CROP:
 152                 sel->r = *vsp1_rwpf_get_crop(rwpf, config);
 153                 break;
 154
 155         case V4L2_SEL_TGT_CROP_BOUNDS:
 156                 format = vsp1_entity_get_pad_format(&rwpf->entity, config,
 157                                                     RWPF_PAD_SINK);
 158                 sel->r.left = 0;
 159                 sel->r.top = 0;
 160                 sel->r.width = format->width;
 161                 sel->r.height = format->height;
 162                 break;
 163
 164         default:
 165                 ret = -EINVAL;
 166                 break;
 167         }
 168
 169 done:
 170         mutex_unlock(&rwpf->entity.lock);
 171         return ret;
 172 }
 173
 174 static int vsp1_rwpf_set_selection(struct v4l2_subdev *subdev,
 175                                    struct v4l2_subdev_pad_config *cfg,
 176                                    struct v4l2_subdev_selection *sel)
 177 {
 178         struct vsp1_rwpf *rwpf = to_rwpf(subdev);
 179         struct v4l2_subdev_pad_config *config;
 180         struct v4l2_mbus_framefmt *format;
 181         struct v4l2_rect *crop;
 182         int ret = 0;
 183
 184         /*
 185          * Cropping is only supported on the RPF and is implemented on the sink
 186          * pad.
 187          */
 188         if (rwpf->entity.type == VSP1_ENTITY_WPF || sel->pad != RWPF_PAD_SINK)
 189                 return -EINVAL;
 190
 191         if (sel->target != V4L2_SEL_TGT_CROP)
 192                 return -EINVAL;
 193
 194         mutex_lock(&rwpf->entity.lock);
 195
 196         config = vsp1_entity_get_pad_config(&rwpf->entity, cfg, sel->which);
 197         if (!config) {
 198                 ret = -EINVAL;
 199                 goto done;
 200         }
 201
 202         /* Make sure the crop rectangle is entirely contained in the image. */
 203         format = vsp1_entity_get_pad_format(&rwpf->entity, config,
 204                                             RWPF_PAD_SINK);
 205
 206         /* Restrict the crop rectangle coordinates to multiples of 2 to avoid
 207          * shifting the color plane.
 208          */
 209         if (format->code == MEDIA_BUS_FMT_AYUV8_1X32) {
 210                 sel->r.left = ALIGN(sel->r.left, 2);
 211                 sel->r.top = ALIGN(sel->r.top, 2);
 212                 sel->r.width = round_down(sel->r.width, 2);
 213                 sel->r.height = round_down(sel->r.height, 2);
 214         }
 215
 216         sel->r.left = min_t(unsigned int, sel->r.left, format->width - 2);
 217         sel->r.top = min_t(unsigned int, sel->r.top, format->height - 2);
 218         sel->r.width = min_t(unsigned int, sel->r.width,
 219                              format->width - sel->r.left);
 220         sel->r.height = min_t(unsigned int, sel->r.height,
 221                               format->height - sel->r.top);
 222
 223         crop = vsp1_rwpf_get_crop(rwpf, config);
 224         *crop = sel->r;
 225
 226         /* Propagate the format to the source pad. */
 227         format = vsp1_entity_get_pad_format(&rwpf->entity, config,
 228                                             RWPF_PAD_SOURCE);
 229         format->width = crop->width;
 230         format->height = crop->height;
 231
 232 done:
 233         mutex_unlock(&rwpf->entity.lock);
 234         return ret;
 235 }
 236
 237 const struct v4l2_subdev_pad_ops vsp1_rwpf_pad_ops = {
 238         .init_cfg = vsp1_entity_init_cfg,
 239         .enum_mbus_code = vsp1_rwpf_enum_mbus_code,
 240         .enum_frame_size = vsp1_rwpf_enum_frame_size,
 241         .get_fmt = vsp1_subdev_get_pad_format,
 242         .set_fmt = vsp1_rwpf_set_format,
 243         .get_selection = vsp1_rwpf_get_selection,
 244         .set_selection = vsp1_rwpf_set_selection,
 245 };
 246
 247 /* -----------------------------------------------------------------------------
 248  * Controls
 249  */
 250
 251 static int vsp1_rwpf_s_ctrl(struct v4l2_ctrl *ctrl)
 252 {
 253         struct vsp1_rwpf *rwpf =
 254                 container_of(ctrl->handler, struct vsp1_rwpf, ctrls);
 255
 256         switch (ctrl->id) {
 257         case V4L2_CID_ALPHA_COMPONENT:
 258                 rwpf->alpha = ctrl->val;
 259                 break;
 260         }
 261
 262         return 0;
 263 }
 264
 265 static const struct v4l2_ctrl_ops vsp1_rwpf_ctrl_ops = {
 266         .s_ctrl = vsp1_rwpf_s_ctrl,
 267 };
 268
 269 int vsp1_rwpf_init_ctrls(struct vsp1_rwpf *rwpf, unsigned int ncontrols)
 270 {
 271         v4l2_ctrl_handler_init(&rwpf->ctrls, ncontrols + 1);
 272         v4l2_ctrl_new_std(&rwpf->ctrls, &vsp1_rwpf_ctrl_ops,
 273                           V4L2_CID_ALPHA_COMPONENT, 0, 255, 1, 255);
 274
 275         rwpf->entity.subdev.ctrl_handler = &rwpf->ctrls;
 276
 277         return rwpf->ctrls.error;
 278 }