The WMI exposes a write-only device ID where three modes can be switched
on some laptops (TUF Gaming FX505GM). There is a hotkey combination Fn-F5
that does have a fan icon which is designed to toggle between these 3
modes.
Add a SysFS entry that reads the last written value and updates value in
WMI on write and a hotkey handler that toggles the modes. The
corresponding DEVS device handler does obviously take 3 possible
argument values.
Method (SFBM, 1, NotSerialized)
{
If ((Arg0 == Zero) { .. }
If ((Arg0 == One)) { .. }
If ((Arg0 == 0x02)) { .. }
}
... // DEVS
If ((IIA0 == 0x00110018))
{
SFBM (IIA1)
Return (One)
}
* 0x00 - is normal,
* 0x01 - is obviously turbo by the amount of noise, might be useful to
avoid CPU frequency throttling on high load,
* 0x02 - the meaning is unknown at the time as modes are not named
in the vendor documentation, but it does look like a quiet mode as CPU
temperature does increase about 10 degrees on maximum load.
Signed-off-by: Yurii Pavlovskyi
---
.../ABI/testing/sysfs-platform-asus-wmi | 10 ++
drivers/platform/x86/asus-wmi.c | 119 --
include/linux/platform_data/x86/asus-wmi.h| 1 +
3 files changed, 117 insertions(+), 13 deletions(-)
diff --git a/Documentation/ABI/testing/sysfs-platform-asus-wmi
b/Documentation/ABI/testing/sysfs-platform-asus-wmi
index 300a40519695..2b3184e297a7 100644
--- a/Documentation/ABI/testing/sysfs-platform-asus-wmi
+++ b/Documentation/ABI/testing/sysfs-platform-asus-wmi
@@ -97,3 +97,13 @@ Description:
Write changed RGB keyboard backlight parameters:
* 1 - permanently,
* 2 - temporarily.
+
+What: /sys/devices/platform//fan_mode
+Date: Apr 2019
+KernelVersion: 5.1
+Contact: "Yurii Pavlovskyi"
+Description:
+ Fan boost mode:
+ * 0 - normal,
+ * 1 - turbo,
+ * 2 - quiet?
diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
index b4fd200e8335..f0e506feb924 100644
--- a/drivers/platform/x86/asus-wmi.c
+++ b/drivers/platform/x86/asus-wmi.c
@@ -69,6 +69,7 @@ MODULE_LICENSE("GPL");
#define NOTIFY_KBD_BRTUP 0xc4
#define NOTIFY_KBD_BRTDWN 0xc5
#define NOTIFY_KBD_BRTTOGGLE 0xc7
+#define NOTIFY_KBD_FBM 0x99
#define ASUS_FAN_DESC "cpu_fan"
#define ASUS_FAN_MFUN 0x13
@@ -77,6 +78,8 @@ MODULE_LICENSE("GPL");
#define ASUS_FAN_CTRL_MANUAL 1
#define ASUS_FAN_CTRL_AUTO 2
+#define ASUS_FAN_MODE_COUNT3
+
#define USB_INTEL_XUSB2PR 0xD0
#define PCI_DEVICE_ID_INTEL_LYNXPOINT_LP_XHCI 0x9c31
@@ -196,6 +199,9 @@ struct asus_wmi {
int asus_hwmon_num_fans;
int asus_hwmon_pwm;
+ bool fan_mode_available;
+ u8 fan_mode;
+
bool kbbl_rgb_available;
struct asus_kbbl_rgb kbbl_rgb;
@@ -1832,6 +1838,87 @@ static int asus_wmi_fan_init(struct asus_wmi *asus)
return 0;
}
+/* Fan mode
***/
+
+static int fan_mode_check_present(struct asus_wmi *asus)
+{
+ u32 result;
+ int err;
+
+ asus->fan_mode_available = false;
+
+ err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_FAN_MODE, );
+ if (err) {
+ if (err == -ENODEV)
+ return 0;
+ else
+ return err;
+ }
+
+ if (result & ASUS_WMI_DSTS_PRESENCE_BIT)
+ asus->fan_mode_available = true;
+
+ return 0;
+}
+
+static int fan_mode_write(struct asus_wmi *asus)
+{
+ int err;
+ u8 value;
+ u32 retval;
+
+ value = asus->fan_mode % ASUS_FAN_MODE_COUNT;
+ pr_info("Set fan mode: %u\n", value);
+ err = asus_wmi_set_devstate(ASUS_WMI_DEVID_FAN_MODE, value, );
+
+ if (err) {
+ pr_warn("Failed to set fan mode: %d\n", err);
+ return err;
+ }
+
+ if (retval != 1) {
+ pr_warn("Failed to set fan mode (retval): 0x%x\n", retval);
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static int fan_mode_switch_next(struct asus_wmi *asus)
+{
+ asus->fan_mode = (asus->fan_mode + 1) % ASUS_FAN_MODE_COUNT;
+ return fan_mode_write(asus);
+}
+
+static ssize_t fan_mode_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct asus_wmi *asus = dev_get_drvdata(dev);
+
+ return show_u8(asus->fan_mode, buf);
+}
+
+static ssize_t fan_mode_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ int result;
+ u8 new_mode;
+
+ struct asus_wmi *asus = dev_get_drvdata(dev);
+
+ result = store_u8(_mode, buf, count);
+ if (result < 0)
+ return result;
+
+
