[Bug 220748] usb: xhci_queue_isoc_tx_prepare ignore start_frame and always assumes URB_ISO_ASAP is set

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=220748

--- Comment #27 from dylan_robinson@motu.com ---
Regarding the start_frame, I want to advocate for treating urb->start_frame as
an input parameter when URB_ISO_ASAP is not set. In looking into porting our
drivers to Linux, we've found the current behavior challenging to accommodate.

As Alan mentioned, different host controllers have different representations of
frame numbers. Other platforms address this by only exposing a normalized,
frame (not microframe) index, while handling controller-specific conversions in
the host controller driver.

-- 
You may reply to this email to add a comment.

You are receiving this mail because:
You are watching the assignee of the bug.