linux-kernel - [PATCH v2 3/3] platform/x86: asus_wmi: Set default fan boost mode to normal

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Date:   Mon,  4 Nov 2019 23:39:07 +0200
From:   Leonid Maksymchuk <leonmaxx@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     platform-driver-x86@...r.kernel.org,
        acpi4asus-user@...ts.sourceforge.net, chiu@...lessm.com,
        yurii.pavlovskyi@...il.com, kristian@...usen.dk,
        andy@...radead.org, dvhart@...radead.org, corentin.chary@...il.com,
        Leonid Maksymchuk <leonmaxx@...il.com>
Subject: [PATCH v2 3/3] platform/x86: asus_wmi: Set default fan boost mode to normal

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@...il.com>
---
 drivers/platform/x86/asus-wmi.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
index f4e5840..70c5fbb 100644
--- a/drivers/platform/x86/asus-wmi.c
+++ b/drivers/platform/x86/asus-wmi.c
@@ -1674,6 +1674,18 @@ static int fan_boost_mode_write(struct asus_wmi *asus)
 	return 0;
 }
 
+static int fan_boost_mode_set_default(struct asus_wmi *asus)
+{
+	int result = 0;
+
+	if (asus->fan_boost_mode_available) {
+		asus->fan_boost_mode = ASUS_FAN_BOOST_MODE_NORMAL;
+		result = fan_boost_mode_write(asus);
+	}
+
+	return result;
+}
+
 static int fan_boost_mode_switch_next(struct asus_wmi *asus)
 {
 	u8 mask = asus->fan_boost_mode_mask;
@@ -2450,6 +2462,7 @@ 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)
-- 
1.8.3.1