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platform/x86: thinkpad_acpi: disable ACPI fan access for T495* and E560

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T495, T495s, and E560 laptops have the FANG+FANW ACPI methods
(therefore fang_handle and fanw_handle are not NULL) but they do not
actually work, which results in a "No such device or address" error.
The DSDT table code for the FANG+FANW methods doesn't seem to do
anything special regarding the fan being secondary. The bug was
introduced in commit 57d0557dfa49 ("platform/x86: thinkpad_acpi: Add
Thinkpad Edge E531 fan support"), which added a new fan control method
via the FANG+FANW ACPI methods.

Add a quirk for T495, T495s, and E560 to avoid the FANG+FANW methods.
Fan access and control is restored after forcing the legacy non-ACPI
fan control method by setting both fang_handle and fanw_handle to NULL.

Reported-by: Vlastimil Holer <vlastimil.holer@gmail.com>
Fixes: 57d0557dfa49 ("platform/x86: thinkpad_acpi: Add Thinkpad Edge E531 fan support")
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=219643
Cc: stable@vger.kernel.org
Tested-by: Alireza Elikahi <scr0lll0ck1s4b0v3h0m3k3y@gmail.com>
Reviewed-by: Kurt Borja <kuurtb@gmail.com>
Signed-off-by: Eduard Christian Dumitrescu <eduard.c.dumitrescu@gmail.com>
Co-developed-by: Seyediman Seyedarab <ImanDevel@gmail.com>
Signed-off-by: Seyediman Seyedarab <ImanDevel@gmail.com>
Link: https://lore.kernel.org/r/20250324152442.106113-1-ImanDevel@gmail.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
This commit is contained in:
Eduard Christian Dumitrescu 2025-03-24 11:24:42 -04:00 committed by Ilpo Järvinen
parent 7b98c1c8e2
commit 2b9f84e7dc
No known key found for this signature in database
GPG Key ID: 59AC4F6153E5CE31
1 changed files with 11 additions and 0 deletions
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11
drivers/platform/x86/thinkpad_acpi.c
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@ -8794,6 +8794,7 @@ static const struct attribute_group fan_driver_attr_group = {
#define TPACPI_FAN_NS 0x0010 /* For EC with non-Standard register addresses */
#define TPACPI_FAN_DECRPM 0x0020 /* For ECFW's with RPM in register as decimal */
#define TPACPI_FAN_TPR 0x0040 /* Fan speed is in Ticks Per Revolution */
#define TPACPI_FAN_NOACPI 0x0080 /* Don't use ACPI methods even if detected */
static const struct tpacpi_quirk fan_quirk_table[] __initconst = {
TPACPI_QEC_IBM('1', 'Y', TPACPI_FAN_Q1),
@ -8824,6 +8825,9 @@ static const struct tpacpi_quirk fan_quirk_table[] __initconst = {
TPACPI_Q_LNV3('N', '1', 'O', TPACPI_FAN_NOFAN), /* X1 Tablet (2nd gen) */
TPACPI_Q_LNV3('R', '0', 'Q', TPACPI_FAN_DECRPM),/* L480 */
TPACPI_Q_LNV('8', 'F', TPACPI_FAN_TPR), /* ThinkPad x120e */
TPACPI_Q_LNV3('R', '0', '0', TPACPI_FAN_NOACPI),/* E560 */
TPACPI_Q_LNV3('R', '1', '2', TPACPI_FAN_NOACPI),/* T495 */
TPACPI_Q_LNV3('R', '1', '3', TPACPI_FAN_NOACPI),/* T495s */
};
static int __init fan_init(struct ibm_init_struct *iibm)
@ -8875,6 +8879,13 @@ static int __init fan_init(struct ibm_init_struct *iibm)
tp_features.fan_ctrl_status_undef = 1;
}
if (quirks & TPACPI_FAN_NOACPI) {
/* E560, T495, T495s */
pr_info("Ignoring buggy ACPI fan access method\n");
fang_handle = NULL;
fanw_handle = NULL;
}
if (gfan_handle) {
/* 570, 600e/x, 770e, 770x */
fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;