)]}'
{
  "commit": "5ba9a84bd446d1b3f41a7ce895648ac088349fe6",
  "tree": "55cb0e138330b10ed795ff1d2b468e6f47d22d2a",
  "parents": [
    "8d135c96bca1fe537ebf7c98561c4e0db3d846d1"
  ],
  "author": {
    "name": "HiFiPhile",
    "email": "admin@hifiphile.com",
    "time": "Sun Oct 11 17:22:17 2026 +0200"
  },
  "committer": {
    "name": "HiFiPhile",
    "email": "admin@hifiphile.com",
    "time": "Sun Oct 11 17:22:17 2026 +0200"
  },
  "message": "ehci: add ChipIdea isochronous transfers\n\nOpt in with CFG_TUH_CHIPIDEA_ISO_ENABLE (about 2.2 KiB without hub\nsupport); the audio_host example enables it and now builds for LPC43 and\ni.MX RT. Supported: HS endpoints with up to three transactions per\nmicroframe, FS endpoints on a native FS port, and FS endpoints behind a HS\nhub through split transactions.\n\n- One outstanding transfer and one iTD/siTD per endpoint, sharing the QH\n  and qTD pools. Completion unlinks the TD before USBH gets the buffer back,\n  so the class callback can submit the next interval.\n- No SOF interrupt (ChipIdea raises one every 125 us, even on a FS port):\n  completions drive the scheduler; frame-list rollover arms TDs beyond the\n  8-frame ring, retires slots that passed unvisited and keeps the extended\n  microframe counter current. FRINDEX is rechecked just before linking, so a\n  delayed submission moves to a later slot of its phase. A TD is published\n  for the next microframe (ChipIdea caches no descriptors).\n- Missed slots, cancellation and close retire a TD only when the controller\n  cannot be on it (iso_td_idle), without stopping the periodic schedule.\n  Schedule waits are bounded; bulk/interrupt abort keeps the transfer when\n  the schedule does not stop.\n- FS behind a HS hub reserves best-effort MTT windows per hub port; split\n  code is compiled out without CFG_TUH_HUB.\n- EHCI descriptors and the frame list move to CFG_TUH_UNCACHED_MEM_SECTION\n  with barriers instead of descriptor cache maintenance.\n- Endpoint lookup by address, idempotent ISO reopen, named iTD/siTD masks.\n\nHost-driver fixtures run under CTest and pre-commit: generic EHCI, ISO\ndisabled/enabled, cached payloads and no hub. The deferred USBH abort and\nendpoint-lifetime work is recorded in docs/superpowers/followup.\n",
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