usb: typec: ucsi: acpi: Assume UCSI 1.2 on Acer Nitro ANV15-41

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The Acer Nitro ANV15-41 exposes a functional UCSI ACPI PPM but
reports a UCSI VERSION value of zero.

ucsi_register() rejects a zero version with -ENODEV, leaving the
system without registered USB Type-C connectors.

The PPM works correctly when using the UCSI 1.2 layout. With UCSI
1.2 assumed, both Type-C connectors register correctly and USB Power
Delivery negotiation works.

Add a DMI-specific UCSI operation for the Acer Nitro ANV15-41 that
substitutes UCSI 1.2 only when firmware reports a zero version.
Preserve any valid non-zero firmware version.

Tested on an Acer Nitro ANV15-41 with BIOS V1.51.

Fixes: c1b0bc2dab ("usb: typec: Add support for UCSI interface")
Cc: stable <stable@kernel.org>
Assisted-by: LLM
Signed-off-by: Pannarat Wiriyaarritham <pannarat.wiriyaarritham@danielcorp.dev>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://patch.msgid.link/20260910023338.31816-1-pannarat.wiriyaarritham@danielcorp.dev
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Pannarat Wiriyaarritham 2026-09-10 09:33:37 +07:00 • committed by Greg Kroah-Hartman

parent 2077aaac93

commit 8c51ea651d

1 changed files with 34 additions and 0 deletions

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drivers/usb/typec/ucsi/ucsi_acpi.c

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