Commit 2daa86e7 authored by Leonid Maksymchuk's avatar Leonid Maksymchuk Committed by Andy Shevchenko
Browse files

platform/x86: asus_wmi: Support throttle thermal policy 



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: default avatarLeonid Maksymchuk <leonmaxx@gmail.com>
Signed-off-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
parent df532c16

Documentation/ABI/testing/sysfs-platform-asus-wmi

+10 −0
Original line number Diff line number Diff line
@@ -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@gmail.com>

Description:

		Throttle thermal policy mode:

			* 0 - default,

			* 1 - overboost,

			* 2 - silent

drivers/platform/x86/asus-wmi.c

+113 −0
Original line number Diff line number Diff line
@@ -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);

include/linux/platform_data/x86/asus-wmi.h

+1 −0
Original line number Diff line number Diff line
@@ -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