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From: Francesco Orro <ncesco@interstellar.eu>
To: z0rc3r@gmail.com
Cc: heikki.krogerus@linux.intel.com, gregkh@linuxfoundation.org,
	linux@roeck-us.net, huangwei@kylinos.cn,
	linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org,
	stable@vger.kernel.org
Subject: Re: [PATCH] usb: typec: ucsi: acpi: Assume UCSI 1.0 on HP ZBook 8 G2i 14
Date: Tue, 27 Oct 2026 13:25:24 +0100	[thread overview]
Message-ID: <20261027122524.817021-1-ncesco@interstellar.eu> (raw)
In-Reply-To: <20261026-ucsi-hp-zbook-8-g2i-v1-1-91002e9ef073@gmail.com>

Hi Ihor,

On Mon, Oct 26, 2026 at 01:47:52AM +0200, Ihor Urazov via B4 Relay wrote:
> The same firmware defect on the HP ZBook Fury G1i 16 was discussed in
> "[RFC PATCH] usb: typec: ucsi: acpi: bootstrap PPM on HP systems with
> empty _DSM func 2" [1]. The defect was reported to HP as case
> 5166176673.

Thanks for picking this up, and for opening the HP case.

The Fury G1i 16 is DMI board "8DE2". Its "UcsiAcpi" SSDT (BIOS X96
01.05.01) matches what you describe for 8ED9: the mailbox is
0x30 bytes with 16-byte MESSAGE_IN/MESSAGE_OUT, _DSM function 0
returns 0x0f (functions 0-3 only), function 2 is a stub, and VERSION
is written only on the EC response path (_Q27 -> UQDC -> UETO, copied
from EC0.UB00/UB01). A PPM_RESET through function 1 completes in
URST(), which sets RESET_COMPLETE directly without going through UETO,
so it does not fill in VERSION either.

I have not run your patch on the Fury yet, so this is based on the
tables only. If an 8DE2 entry next to 8ED9 is wanted, I can test it.

Thanks,
Francesco

      parent reply	other threads:[~2026-10-27 12:25 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-10-25 23:47 Ihor Urazov via B4 Relay
2026-10-26 13:40 ` Heikki Krogerus
2026-10-27  1:51 ` Huang Wei
2026-10-27 12:25 ` Francesco Orro [this message]

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