Re: kern/55258: xhci1 behaves incorrectly

[Ryo ONODERA <ryo%tetera.org@localhost>]

The following reply was made to PR kern/55258; it has been noted by GNATS.

From: Ryo ONODERA <ryo%tetera.org@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: 
Subject: Re: kern/55258: xhci1 behaves incorrectly
Date: Sun, 17 May 2020 20:32:14 +0900

 I have investigated some more and I think that I have 2 problems
 about the original PR.
 
 (1) xhci1 (second xhci) is not detected only when a USB device
     is connected to USB Type-C before boot.
 
 This situation is observed with Linux kernel.
 However Linux kernel can detect second xhci when a USB device is
 connected to USB Type-C after boot.
 I think that this problem may requires PCI hotplug.
 
 
 (2) Root hubs connected to xhci1 are disabled.
 
 I have found that this problem is related to ACPI.
 
 https://github.com/acpica/acpica/commit/6c43e1acdf93a04ca32898d1d89d93fde04d121a
 fixes this problem.
 However this change is partially reverted by
 https://github.com/acpica/acpica/commit/7ef6f75cc2e20b9dd25ef2fe88717d8a1e0e67ad
 and the problem appears again.
 
 The following patch enables the root hub ports.
 
 Index: sys/external/bsd/acpica/dist/events/evgpeblk.c
 ===================================================================
 RCS file: /cvsroot/src/sys/external/bsd/acpica/dist/events/evgpeblk.c,v
 retrieving revision 1.1.1.13
 diff -u -r1.1.1.13 evgpeblk.c
 --- sys/external/bsd/acpica/dist/events/evgpeblk.c	28 Mar 2020 19:46:36 -0000	1.1.1.13
 +++ sys/external/bsd/acpica/dist/events/evgpeblk.c	16 May 2020 12:15:57 -0000
 @@ -533,7 +533,7 @@
                  continue;
              }
  
 -            Status = AcpiEvAddGpeReference (GpeEventInfo, FALSE);
 +            Status = AcpiEvAddGpeReference (GpeEventInfo, TRUE);
              if (ACPI_FAILURE (Status))
              {
                  ACPI_EXCEPTION ((AE_INFO, Status,
 
 
 Of course, Linux can enable the root hub ports without this change.
 
 And I will post dmesg with -x boot option later.