src/main.c

   1 /*
   2  * Media controller test application
   3  *
   4  * Copyright (C) 2010-2011 Ideas on board SPRL
   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 Lesser General Public License as published
  10  * by the Free Software Foundation; either version 2.1 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public License
  19  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  20  */
  21
  22 #include <sys/ioctl.h>
  23 #include <sys/mman.h>
  24 #include <sys/stat.h>
  25 #include <sys/time.h>
  26
  27 #include <ctype.h>
  28 #include <errno.h>
  29 #include <fcntl.h>
  30 #include <stdbool.h>
  31 #include <stdio.h>
  32 #include <stdlib.h>
  33 #include <string.h>
  34 #include <unistd.h>
  35
  36 #include <linux/media.h>
  37 #include <linux/types.h>
  38 #include <linux/v4l2-mediabus.h>
  39 #include <linux/v4l2-subdev.h>
  40 #include <linux/videodev2.h>
  41
  42 #include "mediactl.h"
  43 #include "options.h"
  44 #include "tools.h"
  45 #include "v4l2subdev.h"
  46
  47 /* -----------------------------------------------------------------------------
  48  * Printing
  49  */
  50
  51 static void v4l2_subdev_print_format(struct media_entity *entity,
  52         unsigned int pad, enum v4l2_subdev_format_whence which)
  53 {
  54         struct v4l2_mbus_framefmt format;
  55         struct v4l2_rect rect;
  56         int ret;
  57
  58         ret = v4l2_subdev_get_format(entity, &format, pad, which);
  59         if (ret != 0)
  60                 return;
  61
  62         printf("\t\t[fmt:%s/%ux%u",
  63                v4l2_subdev_pixelcode_to_string(format.code),
  64                format.width, format.height);
  65
  66         ret = v4l2_subdev_get_selection(entity, &rect, pad,
  67                                         V4L2_SEL_TGT_CROP_BOUNDS,
  68                                         which);
  69         if (ret == 0)
  70                 printf("\n\t\t crop.bounds:(%u,%u)/%ux%u", rect.left, rect.top,
  71                        rect.width, rect.height);
  72
  73         ret = v4l2_subdev_get_selection(entity, &rect, pad,
  74                                         V4L2_SEL_TGT_CROP,
  75                                         which);
  76         if (ret == 0)
  77                 printf("\n\t\t crop:(%u,%u)/%ux%u", rect.left, rect.top,
  78                        rect.width, rect.height);
  79
  80         ret = v4l2_subdev_get_selection(entity, &rect, pad,
  81                                         V4L2_SEL_TGT_COMPOSE_BOUNDS,
  82                                         which);
  83         if (ret == 0)
  84                 printf("\n\t\t compose.bounds:(%u,%u)/%ux%u",
  85                        rect.left, rect.top, rect.width, rect.height);
  86
  87         ret = v4l2_subdev_get_selection(entity, &rect, pad,
  88                                         V4L2_SEL_TGT_COMPOSE,
  89                                         which);
  90         if (ret == 0)
  91                 printf("\n\t\t compose:(%u,%u)/%ux%u",
  92                        rect.left, rect.top, rect.width, rect.height);
  93
  94         printf("]\n");
  95 }
  96
  97 static const char *media_entity_type_to_string(unsigned type)
  98 {
  99         static const struct {
 100                 __u32 type;
 101                 const char *name;
 102         } types[] = {
 103                 { MEDIA_ENT_T_DEVNODE, "Node" },
 104                 { MEDIA_ENT_T_V4L2_SUBDEV, "V4L2 subdev" },
 105         };
 106
 107         unsigned int i;
 108
 109         type &= MEDIA_ENT_TYPE_MASK;
 110
 111         for (i = 0; i < ARRAY_SIZE(types); i++) {
 112                 if (types[i].type == type)
 113                         return types[i].name;
 114         }
 115
 116         return "Unknown";
 117 }
 118
 119 static const char *media_entity_subtype_to_string(unsigned type)
 120 {
 121         static const char *node_types[] = {
 122                 "Unknown",
 123                 "V4L",
 124                 "FB",
 125                 "ALSA",
 126                 "DVB",
 127         };
 128         static const char *subdev_types[] = {
 129                 "Unknown",
 130                 "Sensor",
 131                 "Flash",
 132                 "Lens",
 133         };
 134
 135         unsigned int subtype = type & MEDIA_ENT_SUBTYPE_MASK;
 136
 137         switch (type & MEDIA_ENT_TYPE_MASK) {
 138         case MEDIA_ENT_T_DEVNODE:
 139                 if (subtype >= ARRAY_SIZE(node_types))
 140                         subtype = 0;
 141                 return node_types[subtype];
 142
 143         case MEDIA_ENT_T_V4L2_SUBDEV:
 144                 if (subtype >= ARRAY_SIZE(subdev_types))
 145                         subtype = 0;
 146                 return subdev_types[subtype];
 147         default:
 148                 return node_types[0];
 149         }
 150 }
 151
 152 static const char *media_pad_type_to_string(unsigned flag)
 153 {
 154         static const struct {
 155                 __u32 flag;
 156                 const char *name;
 157         } flags[] = {
 158                 { MEDIA_PAD_FL_SINK, "Sink" },
 159                 { MEDIA_PAD_FL_SOURCE, "Source" },
 160         };
 161
 162         unsigned int i;
 163
 164         for (i = 0; i < ARRAY_SIZE(flags); i++) {
 165                 if (flags[i].flag & flag)
 166                         return flags[i].name;
 167         }
 168
 169         return "Unknown";
 170 }
 171
 172 static void media_print_topology_dot(struct media_device *media)
 173 {
 174         unsigned int nents = media_get_entities_count(media);
 175         unsigned int i, j;
 176
 177         printf("digraph board {\n");
 178         printf("\trankdir=TB\n");
 179
 180         for (i = 0; i < nents; ++i) {
 181                 struct media_entity *entity = media_get_entity(media, i);
 182                 const struct media_entity_desc *info = media_entity_get_info(entity);
 183                 const char *devname = media_entity_get_devname(entity);
 184                 unsigned int num_links = media_entity_get_links_count(entity);
 185                 unsigned int npads;
 186
 187                 switch (media_entity_type(entity)) {
 188                 case MEDIA_ENT_T_DEVNODE:
 189                         printf("\tn%08x [label=\"%s\\n%s\", shape=box, style=filled, "
 190                                "fillcolor=yellow]\n",
 191                                info->id, info->name, devname);
 192                         break;
 193
 194                 case MEDIA_ENT_T_V4L2_SUBDEV:
 195                         printf("\tn%08x [label=\"{{", info->id);
 196
 197                         for (j = 0, npads = 0; j < info->pads; ++j) {
 198                                 const struct media_pad *pad = media_entity_get_pad(entity, j);
 199
 200                                 if (!(pad->flags & MEDIA_PAD_FL_SINK))
 201                                         continue;
 202
 203                                 printf("%s<port%u> %u", npads ? " | " : "", j, j);
 204                                 npads++;
 205                         }
 206
 207                         printf("} | %s", info->name);
 208                         if (devname)
 209                                 printf("\\n%s", devname);
 210                         printf(" | {");
 211
 212                         for (j = 0, npads = 0; j < info->pads; ++j) {
 213                                 const struct media_pad *pad = media_entity_get_pad(entity, j);
 214
 215                                 if (!(pad->flags & MEDIA_PAD_FL_SOURCE))
 216                                         continue;
 217
 218                                 printf("%s<port%u> %u", npads ? " | " : "", j, j);
 219                                 npads++;
 220                         }
 221
 222                         printf("}}\", shape=Mrecord, style=filled, fillcolor=green]\n");
 223                         break;
 224
 225                 default:
 226                         continue;
 227                 }
 228
 229                 for (j = 0; j < num_links; j++) {
 230                         const struct media_link *link = media_entity_get_link(entity, j);
 231                         const struct media_pad *source = link->source;
 232                         const struct media_pad *sink = link->sink;
 233
 234                         if (source->entity != entity)
 235                                 continue;
 236
 237                         printf("\tn%08x", media_entity_get_info(source->entity)->id);
 238                         if (media_entity_type(source->entity) == MEDIA_ENT_T_V4L2_SUBDEV)
 239                                 printf(":port%u", source->index);
 240                         printf(" -> ");
 241                         printf("n%08x", media_entity_get_info(sink->entity)->id);
 242                         if (media_entity_type(sink->entity) == MEDIA_ENT_T_V4L2_SUBDEV)
 243                                 printf(":port%u", sink->index);
 244
 245                         if (link->flags & MEDIA_LNK_FL_IMMUTABLE)
 246                                 printf(" [style=bold]");
 247                         else if (!(link->flags & MEDIA_LNK_FL_ENABLED))
 248                                 printf(" [style=dashed]");
 249                         printf("\n");
 250                 }
 251         }
 252
 253         printf("}\n");
 254 }
 255
 256 static void media_print_topology_text(struct media_device *media)
 257 {
 258         static const struct {
 259                 __u32 flag;
 260                 char *name;
 261         } link_flags[] = {
 262                 { MEDIA_LNK_FL_ENABLED, "ENABLED" },
 263                 { MEDIA_LNK_FL_IMMUTABLE, "IMMUTABLE" },
 264                 { MEDIA_LNK_FL_DYNAMIC, "DYNAMIC" },
 265         };
 266
 267         unsigned int nents = media_get_entities_count(media);
 268         unsigned int i, j, k;
 269         unsigned int padding;
 270
 271         printf("Device topology\n");
 272
 273         for (i = 0; i < nents; ++i) {
 274                 struct media_entity *entity = media_get_entity(media, i);
 275                 const struct media_entity_desc *info = media_entity_get_info(entity);
 276                 const char *devname = media_entity_get_devname(entity);
 277                 unsigned int num_links = media_entity_get_links_count(entity);
 278
 279                 padding = printf("- entity %u: ", info->id);
 280                 printf("%s (%u pad%s, %u link%s)\n", info->name,
 281                         info->pads, info->pads > 1 ? "s" : "",
 282                         num_links, num_links > 1 ? "s" : "");
 283                 printf("%*ctype %s subtype %s flags %x\n", padding, ' ',
 284                         media_entity_type_to_string(info->type),
 285                         media_entity_subtype_to_string(info->type),
 286                         info->flags);
 287                 if (devname)
 288                         printf("%*cdevice node name %s\n", padding, ' ', devname);
 289
 290                 for (j = 0; j < info->pads; j++) {
 291                         const struct media_pad *pad = media_entity_get_pad(entity, j);
 292
 293                         printf("\tpad%u: %s\n", j, media_pad_type_to_string(pad->flags));
 294
 295                         if (media_entity_type(entity) == MEDIA_ENT_T_V4L2_SUBDEV)
 296                                 v4l2_subdev_print_format(entity, j, V4L2_SUBDEV_FORMAT_ACTIVE);
 297
 298                         for (k = 0; k < num_links; k++) {
 299                                 const struct media_link *link = media_entity_get_link(entity, k);
 300                                 const struct media_pad *source = link->source;
 301                                 const struct media_pad *sink = link->sink;
 302                                 bool first = true;
 303                                 unsigned int i;
 304
 305                                 if (source->entity == entity && source->index == j)
 306                                         printf("\t\t-> \"%s\":%u [",
 307                                                 media_entity_get_info(sink->entity)->name,
 308                                                 sink->index);
 309                                 else if (sink->entity == entity && sink->index == j)
 310                                         printf("\t\t<- \"%s\":%u [",
 311                                                 media_entity_get_info(source->entity)->name,
 312                                                 source->index);
 313                                 else
 314                                         continue;
 315
 316                                 for (i = 0; i < ARRAY_SIZE(link_flags); i++) {
 317                                         if (!(link->flags & link_flags[i].flag))
 318                                                 continue;
 319                                         if (!first)
 320                                                 printf(",");
 321                                         printf("%s", link_flags[i].name);
 322                                         first = false;
 323                                 }
 324
 325                                 printf("]\n");
 326                         }
 327                 }
 328                 printf("\n");
 329         }
 330 }
 331
 332 void media_print_topology(struct media_device *media, int dot)
 333 {
 334         if (dot)
 335                 media_print_topology_dot(media);
 336         else
 337                 media_print_topology_text(media);
 338 }
 339
 340 int main(int argc, char **argv)
 341 {
 342         struct media_device *media;
 343         int ret = -1;
 344
 345         if (parse_cmdline(argc, argv))
 346                 return EXIT_FAILURE;
 347
 348         media = media_device_new(media_opts.devname);
 349         if (media == NULL) {
 350                 printf("Failed to create media device\n");
 351                 goto out;
 352         }
 353
 354         if (media_opts.verbose)
 355                 media_debug_set_handler(media,
 356                         (void (*)(void *, ...))fprintf, stdout);
 357
 358         /* Enumerate entities, pads and links. */
 359         ret = media_device_enumerate(media);
 360         if (ret < 0) {
 361                 printf("Failed to enumerate %s (%d)\n", media_opts.devname, ret);
 362                 goto out;
 363         }
 364
 365         if (media_opts.print) {
 366                 const struct media_device_info *info = media_get_info(media);
 367
 368                 printf("Media controller API version %u.%u.%u\n\n",
 369                        (info->media_version << 16) & 0xff,
 370                        (info->media_version << 8) & 0xff,
 371                        (info->media_version << 0) & 0xff);
 372                 printf("Media device information\n"
 373                        "------------------------\n"
 374                        "driver          %s\n"
 375                        "model           %s\n"
 376                        "serial          %s\n"
 377                        "bus info        %s\n"
 378                        "hw revision     0x%x\n"
 379                        "driver version  %u.%u.%u\n\n",
 380                        info->driver, info->model,
 381                        info->serial, info->bus_info,
 382                        info->hw_revision,
 383                        (info->driver_version << 16) & 0xff,
 384                        (info->driver_version << 8) & 0xff,
 385                        (info->driver_version << 0) & 0xff);
 386         }
 387
 388         if (media_opts.entity) {
 389                 struct media_entity *entity;
 390
 391                 entity = media_get_entity_by_name(media, media_opts.entity,
 392                                                   strlen(media_opts.entity));
 393                 if (entity == NULL) {
 394                         printf("Entity '%s' not found\n", media_opts.entity);
 395                         goto out;
 396                 }
 397
 398                 printf("%s\n", media_entity_get_devname(entity));
 399         }
 400
 401         if (media_opts.pad) {
 402                 struct media_pad *pad;
 403
 404                 pad = media_parse_pad(media, media_opts.pad, NULL);
 405                 if (pad == NULL) {
 406                         printf("Pad '%s' not found\n", media_opts.pad);
 407                         goto out;
 408                 }
 409
 410                 v4l2_subdev_print_format(pad->entity, pad->index,
 411                                          V4L2_SUBDEV_FORMAT_ACTIVE);
 412         }
 413
 414         if (media_opts.print || media_opts.print_dot) {
 415                 media_print_topology(media, media_opts.print_dot);
 416                 printf("\n");
 417         }
 418
 419         if (media_opts.reset) {
 420                 if (media_opts.verbose)
 421                         printf("Resetting all links to inactive\n");
 422                 ret = media_reset_links(media);
 423                 if (ret) {
 424                         printf("Unable to reset links: %s (%d)\n",
 425                                strerror(-ret), -ret);
 426                         goto out;
 427                 }
 428         }
 429
 430         if (media_opts.links) {
 431                 ret = media_parse_setup_links(media, media_opts.links);
 432                 if (ret) {
 433                         printf("Unable to parse link: %s (%d)\n",
 434                                strerror(-ret), -ret);
 435                         goto out;
 436                 }
 437         }
 438
 439         if (media_opts.formats) {
 440                 ret = v4l2_subdev_parse_setup_formats(media,
 441                                                       media_opts.formats);
 442                 if (ret) {
 443                         printf("Unable to setup formats: %s (%d)\n",
 444                                strerror(-ret), -ret);
 445                         goto out;
 446                 }
 447         }
 448
 449         if (media_opts.interactive) {
 450                 while (1) {
 451                         char buffer[32];
 452                         char *end;
 453
 454                         printf("Enter a link to modify or enter to stop\n");
 455                         if (fgets(buffer, sizeof buffer, stdin) == NULL)
 456                                 break;
 457
 458                         if (buffer[0] == '\n')
 459                                 break;
 460
 461                         ret = media_parse_setup_link(media, buffer, &end);
 462                         if (ret)
 463                                 printf("Unable to parse link: %s (%d)\n",
 464                                        strerror(-ret), -ret);
 465                 }
 466         }
 467
 468         ret = 0;
 469
 470 out:
 471         if (media)
 472                 media_device_unref(media);
 473
 474         return ret ? EXIT_FAILURE : EXIT_SUCCESS;
 475 }
 476