[PATCH v4 3/3] asus_wmi: Set default fan boost mode to normal

[Leonid Maksymchuk]

Set default fan boost mode to normal for multiple reasons:

1) existing code assumes that laptop started in normal mode and that is
   not always correct.
2) FX705DY/FX505DY starts in silent mode and under heavy CPU load it
   overheats and drops CPU frequency to 399MHz [1]. Setting fan mode to
   normal avoids overheating.

[1] Link: https://bugzilla.kernel.org/show_bug.cgi?id=203733

Signed-off-by: Leonid Maksymchuk <leonmaxx@xxxxxxxxx>
---
 drivers/platform/x86/asus-wmi.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
index 4f9c0b99f352..e6565b4e7ed7 100644
--- a/drivers/platform/x86/asus-wmi.c
+++ b/drivers/platform/x86/asus-wmi.c
@@ -1675,6 +1675,15 @@ static int fan_boost_mode_write(struct asus_wmi *asus)
 	return 0;
 }
 
+static int fan_boost_mode_set_default(struct asus_wmi *asus)
+{
+	if (!asus->fan_boost_mode_available)
+		return 0;
+
+	asus->fan_boost_mode = ASUS_FAN_BOOST_MODE_NORMAL;
+	return fan_boost_mode_write(asus);
+}
+
 static int fan_boost_mode_switch_next(struct asus_wmi *asus)
 {
 	u8 mask = asus->fan_boost_mode_mask;
@@ -2451,6 +2460,7 @@ static int asus_wmi_add(struct platform_device *pdev)
 	err = fan_boost_mode_check_present(asus);
 	if (err)
 		goto fail_fan_boost_mode;
+	fan_boost_mode_set_default(asus);
 
 	err = asus_wmi_sysfs_init(asus->platform_device);
 	if (err)
-- 
2.23.0