[PATCH v6 1/2] platform/x86: asus_wmi: Support throttle thermal policy
From: Leonid Maksymchuk
Date: Sun Dec 15 2019 - 09:27:09 EST
Throttle thermal policy ACPI device is used to control CPU cooling and
throttling. This patch adds sysfs entry for setting current mode and
Fn+F5 hotkey that switches to next.
Policy modes:
* 0x00 - default
* 0x01 - overboost
* 0x02 - silent
Signed-off-by: Leonid Maksymchuk <leonmaxx@xxxxxxxxx>
---
.../ABI/testing/sysfs-platform-asus-wmi | 10 ++
drivers/platform/x86/asus-wmi.c | 113 ++++++++++++++++++
include/linux/platform_data/x86/asus-wmi.h | 1 +
3 files changed, 124 insertions(+)
diff --git a/Documentation/ABI/testing/sysfs-platform-asus-wmi b/Documentation/ABI/testing/sysfs-platform-asus-wmi
index 9e99f2909612..1efac0ddb417 100644
--- a/Documentation/ABI/testing/sysfs-platform-asus-wmi
+++ b/Documentation/ABI/testing/sysfs-platform-asus-wmi
@@ -46,3 +46,13 @@ Description:
* 0 - normal,
* 1 - overboost,
* 2 - silent
+
+What: /sys/devices/platform/<platform>/throttle_thermal_policy
+Date: Dec 2019
+KernelVersion: 5.6
+Contact: "Leonid Maksymchuk" <leonmaxx@xxxxxxxxx>
+Description:
+ Throttle thermal policy mode:
+ * 0 - default,
+ * 1 - overboost,
+ * 2 - silent
diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
index 821b08e01635..f10ec9d745e5 100644
--- a/drivers/platform/x86/asus-wmi.c
+++ b/drivers/platform/x86/asus-wmi.c
@@ -61,6 +61,7 @@ MODULE_LICENSE("GPL");
#define NOTIFY_KBD_BRTDWN 0xc5
#define NOTIFY_KBD_BRTTOGGLE 0xc7
#define NOTIFY_KBD_FBM 0x99
+#define NOTIFY_KBD_TTP 0xae
#define ASUS_WMI_FNLOCK_BIOS_DISABLED BIT(0)
@@ -81,6 +82,10 @@ MODULE_LICENSE("GPL");
#define ASUS_FAN_BOOST_MODE_SILENT_MASK 0x02
#define ASUS_FAN_BOOST_MODES_MASK 0x03
+#define ASUS_THROTTLE_THERMAL_POLICY_DEFAULT 0
+#define ASUS_THROTTLE_THERMAL_POLICY_OVERBOOST 1
+#define ASUS_THROTTLE_THERMAL_POLICY_SILENT 2
+
#define USB_INTEL_XUSB2PR 0xD0
#define PCI_DEVICE_ID_INTEL_LYNXPOINT_LP_XHCI 0x9c31
@@ -198,6 +203,9 @@ struct asus_wmi {
u8 fan_boost_mode_mask;
u8 fan_boost_mode;
+ bool throttle_thermal_policy_available;
+ u8 throttle_thermal_policy_mode;
+
// The RSOC controls the maximum charging percentage.
bool battery_rsoc_available;
@@ -1724,6 +1732,98 @@ static ssize_t fan_boost_mode_store(struct device *dev,
// Fan boost mode: 0 - normal, 1 - overboost, 2 - silent
static DEVICE_ATTR_RW(fan_boost_mode);
+/* Throttle thermal policy ****************************************************/
+
+static int throttle_thermal_policy_check_present(struct asus_wmi *asus)
+{
+ u32 result;
+ int err;
+
+ asus->throttle_thermal_policy_available = false;
+
+ err = asus_wmi_get_devstate(asus,
+ ASUS_WMI_DEVID_THROTTLE_THERMAL_POLICY,
+ &result);
+ if (err) {
+ if (err == -ENODEV)
+ return 0;
+ return err;
+ }
+
+ if (result & ASUS_WMI_DSTS_PRESENCE_BIT)
+ asus->throttle_thermal_policy_available = true;
+
+ return 0;
+}
+
+static int throttle_thermal_policy_write(struct asus_wmi *asus)
+{
+ int err;
+ u8 value;
+ u32 retval;
+
+ value = asus->throttle_thermal_policy_mode;
+
+ err = asus_wmi_set_devstate(ASUS_WMI_DEVID_THROTTLE_THERMAL_POLICY,
+ value, &retval);
+ if (err) {
+ pr_warn("Failed to set throttle thermal policy: %d\n", err);
+ return err;
+ }
+
+ if (retval != 1) {
+ pr_warn("Failed to set throttle thermal policy (retval): 0x%x\n",
+ retval);
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static int throttle_thermal_policy_switch_next(struct asus_wmi *asus)
+{
+ u8 new_mode = asus->throttle_thermal_policy_mode + 1;
+
+ if (new_mode > ASUS_THROTTLE_THERMAL_POLICY_SILENT)
+ new_mode = ASUS_THROTTLE_THERMAL_POLICY_DEFAULT;
+
+ asus->throttle_thermal_policy_mode = new_mode;
+ return throttle_thermal_policy_write(asus);
+}
+
+static ssize_t throttle_thermal_policy_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct asus_wmi *asus = dev_get_drvdata(dev);
+ u8 mode = asus->throttle_thermal_policy_mode;
+
+ return scnprintf(buf, PAGE_SIZE, "%d\n", mode);
+}
+
+static ssize_t throttle_thermal_policy_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 = kstrtou8(buf, 10, &new_mode);
+ if (result < 0)
+ return result;
+
+ if (new_mode > ASUS_THROTTLE_THERMAL_POLICY_SILENT)
+ return -EINVAL;
+
+ asus->throttle_thermal_policy_mode = new_mode;
+ throttle_thermal_policy_write(asus);
+
+ return count;
+}
+
+// Throttle thermal policy: 0 - default, 1 - overboost, 2 - silent
+static DEVICE_ATTR_RW(throttle_thermal_policy);
+
/* Backlight ******************************************************************/
static int read_backlight_power(struct asus_wmi *asus)
@@ -2005,6 +2105,11 @@ static void asus_wmi_handle_event_code(int code, struct asus_wmi *asus)
return;
}
+ if (asus->throttle_thermal_policy_available && code == NOTIFY_KBD_TTP) {
+ throttle_thermal_policy_switch_next(asus);
+ return;
+ }
+
if (is_display_toggle(code) && asus->driver->quirks->no_display_toggle)
return;
@@ -2155,6 +2260,7 @@ static struct attribute *platform_attributes[] = {
&dev_attr_lid_resume.attr,
&dev_attr_als_enable.attr,
&dev_attr_fan_boost_mode.attr,
+ &dev_attr_throttle_thermal_policy.attr,
NULL
};
@@ -2178,6 +2284,8 @@ static umode_t asus_sysfs_is_visible(struct kobject *kobj,
devid = ASUS_WMI_DEVID_ALS_ENABLE;
else if (attr == &dev_attr_fan_boost_mode.attr)
ok = asus->fan_boost_mode_available;
+ else if (attr == &dev_attr_throttle_thermal_policy.attr)
+ ok = asus->throttle_thermal_policy_available;
if (devid != -1)
ok = !(asus_wmi_get_devstate_simple(asus, devid) < 0);
@@ -2437,6 +2545,10 @@ static int asus_wmi_add(struct platform_device *pdev)
if (err)
goto fail_fan_boost_mode;
+ err = throttle_thermal_policy_check_present(asus);
+ if (err)
+ goto fail_throttle_thermal_policy;
+
err = asus_wmi_sysfs_init(asus->platform_device);
if (err)
goto fail_sysfs;
@@ -2521,6 +2633,7 @@ static int asus_wmi_add(struct platform_device *pdev)
fail_input:
asus_wmi_sysfs_exit(asus->platform_device);
fail_sysfs:
+fail_throttle_thermal_policy:
fail_fan_boost_mode:
fail_platform:
kfree(asus);
diff --git a/include/linux/platform_data/x86/asus-wmi.h b/include/linux/platform_data/x86/asus-wmi.h
index 60249e22e844..d39fc658c320 100644
--- a/include/linux/platform_data/x86/asus-wmi.h
+++ b/include/linux/platform_data/x86/asus-wmi.h
@@ -58,6 +58,7 @@
#define ASUS_WMI_DEVID_LIGHT_SENSOR 0x00050022 /* ?? */
#define ASUS_WMI_DEVID_LIGHTBAR 0x00050025
#define ASUS_WMI_DEVID_FAN_BOOST_MODE 0x00110018
+#define ASUS_WMI_DEVID_THROTTLE_THERMAL_POLICY 0x00120075
/* Misc */
#define ASUS_WMI_DEVID_CAMERA 0x00060013
--
2.24.0