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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>
This commit is contained in:
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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34
drivers/usb/typec/ucsi/ucsi_acpi.c
View File

@ -121,6 +121,33 @@ static const struct ucsi_operations ucsi_acpi_ops = {
.async_control = ucsi_acpi_async_control
};
static int ucsi_acer_read_version(struct ucsi *ucsi, u16 *version)
{
struct ucsi_acpi *ua = ucsi_get_drvdata(ucsi);
int ret;
ret = ucsi_acpi_read_version(ucsi, version);
if (ret)
return ret;
if (!*version) {
dev_warn(ua->dev, "UCSI version is zero, assuming 1.2\n");
*version = UCSI_VERSION_1_2;
}
return 0;
}
static const struct ucsi_operations ucsi_acer_ops = {
.read_version = ucsi_acer_read_version,
.read_cci = ucsi_acpi_read_cci,
.poll_cci = ucsi_acpi_poll_cci,
.read_message_in = ucsi_acpi_read_message_in,
.write_message_out = ucsi_acpi_write_message_out,
.sync_control = ucsi_sync_control_common,
.async_control = ucsi_acpi_async_control
};
static int ucsi_gram_sync_control(struct ucsi *ucsi, u64 command, u32 *cci,
void *val, size_t len, void *msg_out,
size_t msg_out_size)
@ -162,6 +189,13 @@ static const struct ucsi_operations ucsi_gram_ops = {
};
static const struct dmi_system_id ucsi_acpi_quirks[] = {
{
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
DMI_MATCH(DMI_PRODUCT_NAME, "Nitro ANV15-41"),
},
.driver_data = (void *)&ucsi_acer_ops,
},
{
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "LG Electronics"),