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| author | Pannarat Wiriyaarritham <pannarat.wiriyaarritham@danielcorp.dev> | 2026-09-10 09:33:37 +0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-09-11 14:45:07 +0200 |
| commit | 8c51ea651d043c786c37668c51624bd6b338a0ef (patch) | |
| tree | ce06ee9ce41002f2bddfcb347d57ff356422a5f0 /tools/lib/python | |
| parent | 2077aaac93c166211cda020680015f01e3ce3ec1 (diff) | |
| download | linux-next-8c51ea651d043c786c37668c51624bd6b338a0ef.tar.gz linux-next-8c51ea651d043c786c37668c51624bd6b338a0ef.zip | |
usb: typec: ucsi: acpi: Assume UCSI 1.2 on Acer Nitro ANV15-41
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: c1b0bc2dabfa ("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>
Diffstat (limited to 'tools/lib/python')
0 files changed, 0 insertions, 0 deletions