itshusky01 opened a new pull request, #20090:
URL: https://github.com/apache/nuttx/pull/20090
## Summary
HID class devices fetch their HID Report Descriptor with a
`GET_DESCRIPTOR` setup packet whose recipient is an interface
(bmRequestType = 0x81, wValue = 0x2200).
`stm32_ep0out_stdrequest()` only dispatches GET/SET_DESCRIPTOR when the
recipient is the device and stalls every other recipient. As a result,
HID class devices cannot enumerate on the STM32 OTG FS.
This change also dispatches interface-recipient descriptor requests to
the class driver, following the existing device-recipient path.
## Impact
- Bug fix only; no new configuration options, interfaces or data
structures.
- Behavior change is limited to interface-recipient GET/SET_DESCRIPTOR
requests, which previously were always stalled.
- No impact on in-tree classes (CDC/ACM, MSC, RNDIS, ...) that only use
device-recipient descriptor requests.
## Testing
Tested on an STM32F407VET6 board with a custom HID class device
(interrupt IN endpoint) under NuttX releases/13.0, which contains the
same code path as master:
- Before the change: USB enumeration fails, host cannot obtain the HID
Report Descriptor (STALL on GET_DESCRIPTOR, wValue = 0x2200).
- After the change: device enumerates, HID report transfers succeed.
Host: Windows 11 Pro 25H2 (build 26200.9168)
Windows Device Manager shows the device as HID-compliant under USB Input
Device.
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