diff options
| author | Hans de Goede <hdegoede@redhat.com> | 2021-03-21 12:31:08 +0100 |
|---|---|---|
| committer | Hans de Goede <hdegoede@redhat.com> | 2021-03-21 17:46:51 +0100 |
| commit | ec0e8fc416f70645608c146dcf90d264b2ad6e3c (patch) | |
| tree | 03ba742e032d5550eaff4f727428e2ccf3b1774c /drivers | |
| parent | 3d677f12ea3a2097a16ded570623567403dea959 (diff) | |
| download | linux-ec0e8fc416f70645608c146dcf90d264b2ad6e3c.tar.bz2 | |
platform/x86: thinkpad_acpi: Disable DYTC CQL mode around switching to balanced mode
Testing has shown that setting /sys/firmware/acpi/platform_profile to
"balanced" when /sys/bus/platform/devices/thinkpad_acpi/dytc_lapmode
reports 1, causes dytc_lapmode to get reset to 0 and then it becomes
stuck at 0 for aprox. 30 minutes even if the laptop is used on a lap.
Disabling CQL (when enabled) before issuing the DYTC_CMD_RESET to get
back to balanced mode and re-enabling it afterwards again, like the
code already does when switching to low-power / performance mode fixes
this.
Fixes: c3bfcd4c6762 ("platform/x86: thinkpad_acpi: Add platform profile support")
Tested-by: Mark Pearson <markpearson@lenovo.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20210321113108.7069-1-hdegoede@redhat.com
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/platform/x86/thinkpad_acpi.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c index 8569c1d2a52c..0d9e2ddbf904 100644 --- a/drivers/platform/x86/thinkpad_acpi.c +++ b/drivers/platform/x86/thinkpad_acpi.c @@ -10187,8 +10187,13 @@ static int dytc_profile_set(struct platform_profile_handler *pprof, return err; if (profile == PLATFORM_PROFILE_BALANCED) { - /* To get back to balanced mode we just issue a reset command */ - err = dytc_command(DYTC_CMD_RESET, &output); + /* + * To get back to balanced mode we need to issue a reset command. + * Note we still need to disable CQL mode before hand and re-enable + * it afterwards, otherwise dytc_lapmode gets reset to 0 and stays + * stuck at 0 for aprox. 30 minutes. + */ + err = dytc_cql_command(DYTC_CMD_RESET, &output); if (err) goto unlock; } else { |