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                 /* The RWPF performs format conversion but can't scale, only the
  90                  * format code can be changed on the source pad.
  91                  */
  92                 format->code = fmt->format.code;
  93                 fmt->format = *format;
  94                 goto done;
  95         }
  96
  97         format->code = fmt->format.code;
  98         format->width = clamp_t(unsigned int, fmt->format.width,
  99                                 RWPF_MIN_WIDTH, rwpf->max_width);
 100         format->height = clamp_t(unsigned int, fmt->format.height,
 101                                  RWPF_MIN_HEIGHT, rwpf->max_height);
 102         format->field = V4L2_FIELD_NONE;
 103         format->colorspace = V4L2_COLORSPACE_SRGB;
 104
 105         fmt->format = *format;
 106
 107         if (rwpf->entity.type == VSP1_ENTITY_RPF) {
 108                 struct v4l2_rect *crop;
 109
 110                 /* Update the sink crop rectangle. */
 111                 crop = vsp1_rwpf_get_crop(rwpf, config);
 112                 crop->left = 0;
 113                 crop->top = 0;
 114                 crop->width = fmt->format.width;
 115                 crop->height = fmt->format.height;
 116         }
 117
 118         /* Propagate the format to the source pad. */
 119         format = vsp1_entity_get_pad_format(&rwpf->entity, config,
 120                                             RWPF_PAD_SOURCE);
 121         *format = fmt->format;
 122
 123 done:
 124         mutex_unlock(&rwpf->entity.lock);
 125         return ret;
 126 }
 127
 128 static int vsp1_rwpf_get_selection(struct v4l2_subdev *subdev,
 129                                    struct v4l2_subdev_pad_config *cfg,
 130                                    struct v4l2_subdev_selection *sel)
 131 {
 132         struct vsp1_rwpf *rwpf = to_rwpf(subdev);
 133         struct v4l2_subdev_pad_config *config;
 134         struct v4l2_mbus_framefmt *format;
 135         int ret = 0;
 136
 137         /*
 138          * Cropping is only supported on the RPF and is implemented on the sink
 139          * pad.
 140          */
 141         if (rwpf->entity.type == VSP1_ENTITY_WPF || sel->pad != RWPF_PAD_SINK)
 142                 return -EINVAL;
 143
 144         mutex_lock(&rwpf->entity.lock);
 145
 146         config = vsp1_entity_get_pad_config(&rwpf->entity, cfg, sel->which);
 147         if (!config) {
 148                 ret = -EINVAL;
 149                 goto done;
 150         }
 151
 152         switch (sel->target) {
 153         case V4L2_SEL_TGT_CROP:
 154                 sel->r = *vsp1_rwpf_get_crop(rwpf, config);
 155                 break;
 156
 157         case V4L2_SEL_TGT_CROP_BOUNDS:
 158                 format = vsp1_entity_get_pad_format(&rwpf->entity, config,
 159                                                     RWPF_PAD_SINK);
 160                 sel->r.left = 0;
 161                 sel->r.top = 0;
 162                 sel->r.width = format->width;
 163                 sel->r.height = format->height;
 164                 break;
 165
 166         default:
 167                 ret = -EINVAL;
 168                 break;
 169         }
 170
 171 done:
 172         mutex_unlock(&rwpf->entity.lock);
 173         return ret;
 174 }
 175
 176 static int vsp1_rwpf_set_selection(struct v4l2_subdev *subdev,
 177                                    struct v4l2_subdev_pad_config *cfg,
 178                                    struct v4l2_subdev_selection *sel)
 179 {
 180         struct vsp1_rwpf *rwpf = to_rwpf(subdev);
 181         struct v4l2_subdev_pad_config *config;
 182         struct v4l2_mbus_framefmt *format;
 183         struct v4l2_rect *crop;
 184         int ret = 0;
 185
 186         /*
 187          * Cropping is only supported on the RPF and is implemented on the sink
 188          * pad.
 189          */
 190         if (rwpf->entity.type == VSP1_ENTITY_WPF || sel->pad != RWPF_PAD_SINK)
 191                 return -EINVAL;
 192
 193         if (sel->target != V4L2_SEL_TGT_CROP)
 194                 return -EINVAL;
 195
 196         mutex_lock(&rwpf->entity.lock);
 197
 198         config = vsp1_entity_get_pad_config(&rwpf->entity, cfg, sel->which);
 199         if (!config) {
 200                 ret = -EINVAL;
 201                 goto done;
 202         }
 203
 204         /* Make sure the crop rectangle is entirely contained in the image. */
 205         format = vsp1_entity_get_pad_format(&rwpf->entity, config,
 206                                             RWPF_PAD_SINK);
 207
 208         /* Restrict the crop rectangle coordinates to multiples of 2 to avoid
 209          * shifting the color plane.
 210          */
 211         if (format->code == MEDIA_BUS_FMT_AYUV8_1X32) {
 212                 sel->r.left = ALIGN(sel->r.left, 2);
 213                 sel->r.top = ALIGN(sel->r.top, 2);
 214                 sel->r.width = round_down(sel->r.width, 2);
 215                 sel->r.height = round_down(sel->r.height, 2);
 216         }
 217
 218         sel->r.left = min_t(unsigned int, sel->r.left, format->width - 2);
 219         sel->r.top = min_t(unsigned int, sel->r.top, format->height - 2);
 220         sel->r.width = min_t(unsigned int, sel->r.width,
 221                              format->width - sel->r.left);
 222         sel->r.height = min_t(unsigned int, sel->r.height,
 223                               format->height - sel->r.top);
 224
 225         crop = vsp1_rwpf_get_crop(rwpf, config);
 226         *crop = sel->r;
 227
 228         /* Propagate the format to the source pad. */
 229         format = vsp1_entity_get_pad_format(&rwpf->entity, config,
 230                                             RWPF_PAD_SOURCE);
 231         format->width = crop->width;
 232         format->height = crop->height;
 233
 234 done:
 235         mutex_unlock(&rwpf->entity.lock);
 236         return ret;
 237 }
 238
 239 const struct v4l2_subdev_pad_ops vsp1_rwpf_pad_ops = {
 240         .init_cfg = vsp1_entity_init_cfg,
 241         .enum_mbus_code = vsp1_rwpf_enum_mbus_code,
 242         .enum_frame_size = vsp1_rwpf_enum_frame_size,
 243         .get_fmt = vsp1_subdev_get_pad_format,
 244         .set_fmt = vsp1_rwpf_set_format,
 245         .get_selection = vsp1_rwpf_get_selection,
 246         .set_selection = vsp1_rwpf_set_selection,
 247 };
 248
 249 /* -----------------------------------------------------------------------------
 250  * Controls
 251  */
 252
 253 static int vsp1_rwpf_s_ctrl(struct v4l2_ctrl *ctrl)
 254 {
 255         struct vsp1_rwpf *rwpf =
 256                 container_of(ctrl->handler, struct vsp1_rwpf, ctrls);
 257
 258         switch (ctrl->id) {
 259         case V4L2_CID_ALPHA_COMPONENT:
 260                 rwpf->alpha = ctrl->val;
 261                 break;
 262         }
 263
 264         return 0;
 265 }
 266
 267 static const struct v4l2_ctrl_ops vsp1_rwpf_ctrl_ops = {
 268         .s_ctrl = vsp1_rwpf_s_ctrl,
 269 };
 270
 271 int vsp1_rwpf_init_ctrls(struct vsp1_rwpf *rwpf, unsigned int ncontrols)
 272 {
 273         v4l2_ctrl_handler_init(&rwpf->ctrls, ncontrols + 1);
 274         v4l2_ctrl_new_std(&rwpf->ctrls, &vsp1_rwpf_ctrl_ops,
 275                           V4L2_CID_ALPHA_COMPONENT, 0, 255, 1, 255);
 276
 277         rwpf->entity.subdev.ctrl_handler = &rwpf->ctrls;
 278
 279         return rwpf->ctrls.error;
 280 }