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         struct v4l2_rect *crop;
  70
  71         config = vsp1_entity_get_pad_config(&rwpf->entity, cfg, fmt->which);
  72         if (!config)
  73                 return -EINVAL;
  74
  75         /* Default to YUV if the requested format is not supported. */
  76         if (fmt->format.code != MEDIA_BUS_FMT_ARGB8888_1X32 &&
  77             fmt->format.code != MEDIA_BUS_FMT_AYUV8_1X32)
  78                 fmt->format.code = MEDIA_BUS_FMT_AYUV8_1X32;
  79
  80         format = vsp1_entity_get_pad_format(&rwpf->entity, config, fmt->pad);
  81
  82         if (fmt->pad == RWPF_PAD_SOURCE) {
  83                 /* The RWPF performs format conversion but can't scale, only the
  84                  * format code can be changed on the source pad.
  85                  */
  86                 format->code = fmt->format.code;
  87                 fmt->format = *format;
  88                 return 0;
  89         }
  90
  91         format->code = fmt->format.code;
  92         format->width = clamp_t(unsigned int, fmt->format.width,
  93                                 RWPF_MIN_WIDTH, rwpf->max_width);
  94         format->height = clamp_t(unsigned int, fmt->format.height,
  95                                  RWPF_MIN_HEIGHT, rwpf->max_height);
  96         format->field = V4L2_FIELD_NONE;
  97         format->colorspace = V4L2_COLORSPACE_SRGB;
  98
  99         fmt->format = *format;
 100
 101         /* Update the sink crop rectangle. */
 102         crop = vsp1_rwpf_get_crop(rwpf, config);
 103         crop->left = 0;
 104         crop->top = 0;
 105         crop->width = fmt->format.width;
 106         crop->height = fmt->format.height;
 107
 108         /* Propagate the format to the source pad. */
 109         format = vsp1_entity_get_pad_format(&rwpf->entity, config,
 110                                             RWPF_PAD_SOURCE);
 111         *format = fmt->format;
 112
 113         return 0;
 114 }
 115
 116 static int vsp1_rwpf_get_selection(struct v4l2_subdev *subdev,
 117                                    struct v4l2_subdev_pad_config *cfg,
 118                                    struct v4l2_subdev_selection *sel)
 119 {
 120         struct vsp1_rwpf *rwpf = to_rwpf(subdev);
 121         struct v4l2_subdev_pad_config *config;
 122         struct v4l2_mbus_framefmt *format;
 123
 124         /* Cropping is implemented on the sink pad. */
 125         if (sel->pad != RWPF_PAD_SINK)
 126                 return -EINVAL;
 127
 128         config = vsp1_entity_get_pad_config(&rwpf->entity, cfg, sel->which);
 129         if (!config)
 130                 return -EINVAL;
 131
 132         switch (sel->target) {
 133         case V4L2_SEL_TGT_CROP:
 134                 sel->r = *vsp1_rwpf_get_crop(rwpf, config);
 135                 break;
 136
 137         case V4L2_SEL_TGT_CROP_BOUNDS:
 138                 format = vsp1_entity_get_pad_format(&rwpf->entity, config,
 139                                                     RWPF_PAD_SINK);
 140                 sel->r.left = 0;
 141                 sel->r.top = 0;
 142                 sel->r.width = format->width;
 143                 sel->r.height = format->height;
 144                 break;
 145
 146         default:
 147                 return -EINVAL;
 148         }
 149
 150         return 0;
 151 }
 152
 153 static int vsp1_rwpf_set_selection(struct v4l2_subdev *subdev,
 154                                    struct v4l2_subdev_pad_config *cfg,
 155                                    struct v4l2_subdev_selection *sel)
 156 {
 157         struct vsp1_rwpf *rwpf = to_rwpf(subdev);
 158         struct v4l2_subdev_pad_config *config;
 159         struct v4l2_mbus_framefmt *format;
 160         struct v4l2_rect *crop;
 161
 162         /* Cropping is implemented on the sink pad. */
 163         if (sel->pad != RWPF_PAD_SINK)
 164                 return -EINVAL;
 165
 166         if (sel->target != V4L2_SEL_TGT_CROP)
 167                 return -EINVAL;
 168
 169         config = vsp1_entity_get_pad_config(&rwpf->entity, cfg, sel->which);
 170         if (!config)
 171                 return -EINVAL;
 172
 173         /* Make sure the crop rectangle is entirely contained in the image. The
 174          * WPF top and left offsets are limited to 255.
 175          */
 176         format = vsp1_entity_get_pad_format(&rwpf->entity, config,
 177                                             RWPF_PAD_SINK);
 178
 179         /* Restrict the crop rectangle coordinates to multiples of 2 to avoid
 180          * shifting the color plane.
 181          */
 182         if (format->code == MEDIA_BUS_FMT_AYUV8_1X32) {
 183                 sel->r.left = ALIGN(sel->r.left, 2);
 184                 sel->r.top = ALIGN(sel->r.top, 2);
 185                 sel->r.width = round_down(sel->r.width, 2);
 186                 sel->r.height = round_down(sel->r.height, 2);
 187         }
 188
 189         sel->r.left = min_t(unsigned int, sel->r.left, format->width - 2);
 190         sel->r.top = min_t(unsigned int, sel->r.top, format->height - 2);
 191         if (rwpf->entity.type == VSP1_ENTITY_WPF) {
 192                 sel->r.left = min_t(unsigned int, sel->r.left, 255);
 193                 sel->r.top = min_t(unsigned int, sel->r.top, 255);
 194         }
 195         sel->r.width = min_t(unsigned int, sel->r.width,
 196                              format->width - sel->r.left);
 197         sel->r.height = min_t(unsigned int, sel->r.height,
 198                               format->height - sel->r.top);
 199
 200         crop = vsp1_rwpf_get_crop(rwpf, config);
 201         *crop = sel->r;
 202
 203         /* Propagate the format to the source pad. */
 204         format = vsp1_entity_get_pad_format(&rwpf->entity, config,
 205                                             RWPF_PAD_SOURCE);
 206         format->width = crop->width;
 207         format->height = crop->height;
 208
 209         return 0;
 210 }
 211
 212 const struct v4l2_subdev_pad_ops vsp1_rwpf_pad_ops = {
 213         .init_cfg = vsp1_entity_init_cfg,
 214         .enum_mbus_code = vsp1_rwpf_enum_mbus_code,
 215         .enum_frame_size = vsp1_rwpf_enum_frame_size,
 216         .get_fmt = vsp1_subdev_get_pad_format,
 217         .set_fmt = vsp1_rwpf_set_format,
 218         .get_selection = vsp1_rwpf_get_selection,
 219         .set_selection = vsp1_rwpf_set_selection,
 220 };
 221
 222 /* -----------------------------------------------------------------------------
 223  * Controls
 224  */
 225
 226 static int vsp1_rwpf_s_ctrl(struct v4l2_ctrl *ctrl)
 227 {
 228         struct vsp1_rwpf *rwpf =
 229                 container_of(ctrl->handler, struct vsp1_rwpf, ctrls);
 230
 231         switch (ctrl->id) {
 232         case V4L2_CID_ALPHA_COMPONENT:
 233                 rwpf->alpha = ctrl->val;
 234                 break;
 235         }
 236
 237         return 0;
 238 }
 239
 240 static const struct v4l2_ctrl_ops vsp1_rwpf_ctrl_ops = {
 241         .s_ctrl = vsp1_rwpf_s_ctrl,
 242 };
 243
 244 int vsp1_rwpf_init_ctrls(struct vsp1_rwpf *rwpf)
 245 {
 246         rwpf->alpha = 255;
 247
 248         v4l2_ctrl_handler_init(&rwpf->ctrls, 1);
 249         v4l2_ctrl_new_std(&rwpf->ctrls, &vsp1_rwpf_ctrl_ops,
 250                           V4L2_CID_ALPHA_COMPONENT, 0, 255, 1, 255);
 251
 252         rwpf->entity.subdev.ctrl_handler = &rwpf->ctrls;
 253
 254         return rwpf->ctrls.error;
 255 }