Message-Id: <4WB4YQ.FZZN98OTL3ZF3@ljones.dev>
Date:   Fri, 20 Aug 2021 15:19:16 +1200
From:   Luke Jones <luke@...nes.dev>
To:     linux-kernel@...r.kernel.org
Cc:     hdegoede@...hat.com, hadess@...ess.net,
        platform-driver-x86@...r.kernel.org
Subject: Re: [PATCH v3 1/1] asus-wmi: Add support for custom fan curves

Sorry, didn't include the cover letter with change log..

- V1
  + Initial patch work
- V2
  + Don't fail and remove wmi driver if error from
    asus_wmi_evaluate_method_buf() if error is -ENODEV
- V3
  + Store the "default" fan curves
  + Call throttle_thermal_policy_write() if a curve is erased to ensure
    that the factory default for a profile is applied again

Luke D. Jones (1):
  asus-wmi: Add support for custom fan curves

 drivers/platform/x86/asus-wmi.c | 533 +++++++++++++++++++++
 include/linux/platform_data/x86/asus-wmi.h | 2 +
 2 files changed, 535 insertions(+)

-- 
2.31.1


On Fri, Aug 20 2021 at 15:16:25 +1200, Luke D. Jones <luke@...nes.dev> 
wrote:
> Add support for custom fan curves found on some ASUS ROG laptops.
> 
> These laptops have the ability to set a custom curve for the CPU
> and GPU fans via an ACPI method call. This patch enables this,
> additionally enabling custom fan curves per-profile, where profile
> here means each of the 3 levels of "throttle_thermal_policy".
> 
> Signed-off-by: Luke D. Jones <luke@...nes.dev>
> ---
>  drivers/platform/x86/asus-wmi.c            | 533 
> +++++++++++++++++++++
>  include/linux/platform_data/x86/asus-wmi.h |   2 +
>  2 files changed, 535 insertions(+)
> 
> diff --git a/drivers/platform/x86/asus-wmi.c 
> b/drivers/platform/x86/asus-wmi.c
> index cc5811844012..13b6653ca1b4 100644
> --- a/drivers/platform/x86/asus-wmi.c
> +++ b/drivers/platform/x86/asus-wmi.c
> @@ -108,6 +108,8 @@ module_param(fnlock_default, bool, 0444);
> 
>  static const char * const ashs_ids[] = { "ATK4001", "ATK4002", NULL 
> };
> 
> +static int throttle_thermal_policy_write(struct asus_wmi*);
> +
>  static bool ashs_present(void)
>  {
>  	int i = 0;
> @@ -122,6 +124,7 @@ struct bios_args {
>  	u32 arg0;
>  	u32 arg1;
>  	u32 arg2; /* At least TUF Gaming series uses 3 dword input buffer. 
> */
> +	u32 arg3;
>  	u32 arg4;
>  	u32 arg5;
>  } __packed;
> @@ -173,6 +176,12 @@ enum fan_type {
>  	FAN_TYPE_SPEC83,	/* starting in Spec 8.3, use CPU_FAN_CTRL */
>  };
> 
> +struct fan_curve {
> +	char *balanced;
> +	char *performance;
> +	char *quiet;
> +};
> +
>  struct asus_wmi {
>  	int dsts_id;
>  	int spec;
> @@ -220,6 +229,12 @@ struct asus_wmi {
>  	bool throttle_thermal_policy_available;
>  	u8 throttle_thermal_policy_mode;
> 
> +	bool cpu_fan_curve_available;
> +	struct fan_curve cpu_fan_curve;
> +
> +    bool gpu_fan_curve_available;
> +	struct fan_curve gpu_fan_curve;
> +
>  	struct platform_profile_handler platform_profile_handler;
>  	bool platform_profile_support;
> 
> @@ -285,6 +300,85 @@ int asus_wmi_evaluate_method(u32 method_id, u32 
> arg0, u32 arg1, u32 *retval)
>  }
>  EXPORT_SYMBOL_GPL(asus_wmi_evaluate_method);
> 
> +static int asus_wmi_evaluate_method5(u32 method_id,
> +		u32 arg0, u32 arg1, u32 arg2, u32 arg3, u32 arg4, u32 *retval)
> +{
> +	struct bios_args args = {
> +		.arg0 = arg0,
> +		.arg1 = arg1,
> +		.arg2 = arg2,
> +		.arg3 = arg3,
> +		.arg4 = arg4,
> +	};
> +	struct acpi_buffer input = { (acpi_size) sizeof(args), &args };
> +	struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
> +	acpi_status status;
> +	union acpi_object *obj;
> +	u32 tmp = 0;
> +
> +	status = wmi_evaluate_method(ASUS_WMI_MGMT_GUID, 0, method_id,
> +				     &input, &output);
> +
> +	if (ACPI_FAILURE(status))
> +		return -EIO;
> +
> +	obj = (union acpi_object *)output.pointer;
> +	if (obj && obj->type == ACPI_TYPE_INTEGER)
> +		tmp = (u32) obj->integer.value;
> +
> +	if (retval)
> +		*retval = tmp;
> +
> +	kfree(obj);
> +
> +	if (tmp == ASUS_WMI_UNSUPPORTED_METHOD)
> +		return -ENODEV;
> +
> +	return 0;
> +}
> +
> +/*
> + * Returns as an error if the method output is not a buffer. 
> Typically this
> + * means that the method called is unsupported.
> +*/
> +static int asus_wmi_evaluate_method_buf(u32 method_id,
> +		u32 arg0, u32 arg1, u8 *ret_buffer)
> +{
> +	struct bios_args args = {
> +		.arg0 = arg0,
> +		.arg1 = arg1,
> +		.arg2 = 0,
> +	};
> +	struct acpi_buffer input = { (acpi_size) sizeof(args), &args };
> +	struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
> +	acpi_status status;
> +	union acpi_object *obj;
> +	u32 int_tmp = 0;
> +
> +	status = wmi_evaluate_method(ASUS_WMI_MGMT_GUID, 0, method_id,
> +				     &input, &output);
> +
> +	if (ACPI_FAILURE(status))
> +		return -EIO;
> +
> +	obj = (union acpi_object *)output.pointer;
> +
> +	if (obj && obj->type == ACPI_TYPE_INTEGER) {
> +		int_tmp = (u32) obj->integer.value;
> +		if (int_tmp == ASUS_WMI_UNSUPPORTED_METHOD)
> +			return -ENODEV;
> +		return int_tmp;
> +	}
> +
> +	if (obj && obj->type == ACPI_TYPE_BUFFER && obj->buffer.length >= 
> 16) {
> +		memcpy(ret_buffer, obj->buffer.pointer, obj->buffer.length);
> +	}
> +
> +	kfree(obj);
> +
> +	return 0;
> +}
> +
>  static int asus_wmi_evaluate_method_agfn(const struct acpi_buffer 
> args)
>  {
>  	struct acpi_buffer input;
> @@ -2043,6 +2137,349 @@ 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);
> 
> +/* Custom fan curves per-profile 
> **********************************************/
> +
> +static int custom_fan_check_present(struct asus_wmi *asus,
> +									bool *available, u32 dev)
> +{
> +	struct fan_curve *curves = &asus->cpu_fan_curve;
> +	u8 *b = kzalloc(16 * sizeof(u8), GFP_KERNEL);
> +	/* 15 punctuation marks + 16 sets of numbers up to 3 char each */
> +	int str_len = 15 + 16 * 3;
> +	int err;
> +
> +	*available = false;
> +
> +	if (dev == ASUS_WMI_DEVID_GPU_FAN_CURVE)
> +		curves = &asus->gpu_fan_curve;
> +
> +	/* Balanced default */
> +	err = asus_wmi_evaluate_method_buf(asus->dsts_id, dev, 0, b);
> +	if (err) {
> +		if (err == -ENODEV)
> +			return 0;
> +		return err;
> +	}
> +
> +	curves->balanced = kzalloc(str_len * sizeof(char), GFP_KERNEL);
> +	if (!curves->balanced)
> +		return -ENOMEM;
> +
> +	sprintf(curves->balanced, 
> "%d:%d,%d:%d,%d:%d,%d:%d,%d:%d,%d:%d,%d:%d,%d:%d",
> +		b[0], b[8], b[1], b[9], b[2], b[10], b[3], b[11],
> +		b[4], b[12], b[5], b[13], b[6], b[14], b[7], b[15]);
> +
> +	/* Quiet default */
> +	err = asus_wmi_evaluate_method_buf(asus->dsts_id, dev, 1, b);
> +	if (err) {
> +		if (err == -ENODEV)
> +			return 0;
> +		return err;
> +	}
> +
> +	curves->quiet = kzalloc(str_len * sizeof(char), GFP_KERNEL);
> +	if (!curves->quiet)
> +		return -ENOMEM;
> +
> +	sprintf(curves->quiet, 
> "%d:%d,%d:%d,%d:%d,%d:%d,%d:%d,%d:%d,%d:%d,%d:%d",
> +		b[0], b[8], b[1], b[9], b[2], b[10], b[3], b[11],
> +		b[4], b[12], b[5], b[13], b[6], b[14], b[7], b[15]);
> +
> +	/* Performance default */
> +	err = asus_wmi_evaluate_method_buf(asus->dsts_id, dev, 2, b);
> +	if (err) {
> +		if (err == -ENODEV)
> +			return 0;
> +		return err;
> +	}
> +
> +	curves->performance = kzalloc(str_len * sizeof(char), GFP_KERNEL);
> +	if (!curves->performance)
> +		return -ENOMEM;
> +
> +	sprintf(curves->performance,
> +		"%d:%d,%d:%d,%d:%d,%d:%d,%d:%d,%d:%d,%d:%d,%d:%d",
> +		b[0], b[8], b[1], b[9], b[2], b[10], b[3], b[11],
> +		b[4], b[12], b[5], b[13], b[6], b[14], b[7], b[15]);
> +
> +	kfree(b);
> +
> +	*available = true;
> +	return 0;
> +}
> +
> +/*
> + * The expected input is of the format
> + *     "30:1,49:2,59:3,69:4,79:31,89:49,99:56,109:58"
> + * where a pair is 30:1, with 30 = temperature, and 1 = percentage
> +*/
> +static int fan_curve_check_valid(const char *curve)
> +{
> +    char * buf, *set, *set_end, *pair_tmp, *pair, *pair_end;
> +	int err, ret;
> +
> +	char *set_delimiter = ",";
> +	char *pair_delimiter = ":";
> +    bool pair_start = true;
> +	u32 prev_percent = 0;
> +	u32 prev_temp = 0;
> +    u32 percent = 0;
> +	u32 temp = 0;
> +
> +    buf = set_end = pair_end = kstrdup(curve, GFP_KERNEL);
> +
> +	while( (set = strsep(&set_end, set_delimiter)) != NULL ) {
> +		pair_tmp = kstrdup(set, GFP_KERNEL);
> +        pair_start = true;
> +		while( (pair = strsep(&pair_tmp, pair_delimiter)) != NULL ) {
> +			err = kstrtouint(pair, 10, &ret);
> +			if (err) {
> +				kfree(pair_tmp);
> +				kfree(buf);
> +				return err;
> +			}
> +
> +            if (pair_start) {
> +                temp = ret;
> +                pair_start = false;
> +            } else {
> +                percent = ret;
> +            }
> +		}
> +		kfree(pair_tmp);
> +
> +        if (temp < prev_temp || percent < prev_percent || percent > 
> 100) {
> +            pr_info("Fan curve invalid");
> +			pr_info("A value is sequentially lower or percentage is > 100");
> +            kfree(buf);
> +            return -EINVAL;
> +        }
> +
> +        prev_temp = temp;
> +        prev_percent = percent;
> +	}
> +	kfree(buf);
> +
> +    return 0;
> +}
> +
> +static int fan_curve_write(struct asus_wmi *asus, u32 dev, char 
> *curve)
> +{
> +    char * buf, *set, *pair_tmp, *pair, *set_end, *pair_end;
> +    int err, ret;
> +
> +	char *set_delimiter = ",";
> +	char *pair_delimiter = ":";
> +	bool half_complete = false;
> +	bool pair_start = true;
> +	u32 percent = 0;
> +	u32 shift = 0;
> +	u32 temp = 0;
> +    u32 arg1 = 0;
> +    u32 arg2 = 0;
> +    u32 arg3 = 0;
> +    u32 arg4 = 0;
> +
> +    buf = set_end = pair_end = kstrdup(curve, GFP_KERNEL);
> +
> +	while( (set = strsep(&set_end, set_delimiter)) != NULL ) {
> +		pair_tmp = kstrdup(set, GFP_KERNEL);
> +        pair_start = true;
> +		while( (pair = strsep(&pair_tmp, pair_delimiter)) != NULL ) {
> +			err = kstrtouint(pair, 10, &ret);
> +            if (err) {
> +                kfree(pair_tmp);
> +                kfree(buf);
> +                return err;
> +            }
> +
> +            if (pair_start) {
> +                temp = ret;
> +                pair_start = false;
> +            } else {
> +                percent = ret;
> +            }
> +		}
> +		kfree(pair_tmp);
> +
> +        if (!half_complete) {
> +            arg1 += temp << shift;
> +            arg3 += percent << shift;
> +        } else {
> +            arg2 += temp << shift;
> +            arg4 += percent << shift;
> +        }
> +        shift += 8;
> +
> +        if (shift == 32) {
> +            shift = 0;
> +            half_complete = true;
> +        }
> +	}
> +	kfree(buf);
> +
> +    return asus_wmi_evaluate_method5(ASUS_WMI_METHODID_DEVS, dev,
> +									 arg1, arg2, arg3, arg4, &ret);
> +}
> +
> +static ssize_t fan_curve_store(struct asus_wmi *asus, const char 
> *buf,
> +								size_t count, u32 dev, char **curve,
> +								u32 throttle_policy)
> +{
> +    int err;
> +
> +	/* Allow a user to write "" or " " to erase a curve setting */
> +	if (strlen(buf) <= 1 || strcmp(buf, " \n") == 0) {
> +		kfree(*curve);
> +		*curve = NULL;
> +		err = throttle_thermal_policy_write(asus);
> +		if (err)
> +			return err;
> +		return count;
> +	}
> +
> +	err = fan_curve_check_valid(buf);
> +	if (err)
> +		return err;
> +
> +	if (*curve)
> +		kfree(*curve);
> +
> +	/* Always save fan curve if it is valid */
> +    *curve = kstrdup(buf, GFP_KERNEL);
> +
> +	/* Maybe activate fan curve if in associated mode */
> +    if (asus->throttle_thermal_policy_mode == throttle_policy) {
> +        err = fan_curve_write(asus, dev, *curve);
> +        if (err)
> +            return err;
> +    }
> +
> +    return count;
> +}
> +
> +/*
> + * CPU Fan Curves
> +*/
> +
> +static ssize_t cpu_fan_curve_balanced_show(struct device *dev,
> +				   struct device_attribute *attr, char *buf)
> +{
> +	struct asus_wmi *asus = dev_get_drvdata(dev);
> +	return scnprintf(buf, PAGE_SIZE, "%s\n", 
> asus->cpu_fan_curve.balanced);
> +}
> +
> +static ssize_t cpu_fan_curve_balanced_store(struct device *dev,
> +				    struct device_attribute *attr,
> +				    const char *buf, size_t count)
> +{
> +    struct asus_wmi *asus = dev_get_drvdata(dev);
> +    return fan_curve_store(asus, buf, count, 
> ASUS_WMI_DEVID_CPU_FAN_CURVE,
> +							&asus->cpu_fan_curve.balanced,
> +                            ASUS_THROTTLE_THERMAL_POLICY_DEFAULT);
> +}
> +
> +static DEVICE_ATTR_RW(cpu_fan_curve_balanced);
> +
> +static ssize_t cpu_fan_curve_performance_show(struct device *dev,
> +				   struct device_attribute *attr, char *buf)
> +{
> +	struct asus_wmi *asus = dev_get_drvdata(dev);
> +	return scnprintf(buf, PAGE_SIZE, "%s\n", 
> asus->cpu_fan_curve.performance);
> +}
> +
> +static ssize_t cpu_fan_curve_performance_store(struct device *dev,
> +				    struct device_attribute *attr,
> +				    const char *buf, size_t count)
> +{
> +    struct asus_wmi *asus = dev_get_drvdata(dev);
> +    return fan_curve_store(asus, buf, count, 
> ASUS_WMI_DEVID_CPU_FAN_CURVE,
> +							&asus->cpu_fan_curve.performance,
> +                            ASUS_THROTTLE_THERMAL_POLICY_OVERBOOST);
> +}
> +
> +static DEVICE_ATTR_RW(cpu_fan_curve_performance);
> +
> +static ssize_t cpu_fan_curve_quiet_show(struct device *dev,
> +				   struct device_attribute *attr, char *buf)
> +{
> +	struct asus_wmi *asus = dev_get_drvdata(dev);
> +	return scnprintf(buf, PAGE_SIZE, "%s\n", asus->cpu_fan_curve.quiet);
> +}
> +
> +static ssize_t cpu_fan_curve_quiet_store(struct device *dev,
> +				    struct device_attribute *attr,
> +				    const char *buf, size_t count)
> +{
> +    struct asus_wmi *asus = dev_get_drvdata(dev);
> +    return fan_curve_store(asus, buf, count, 
> ASUS_WMI_DEVID_CPU_FAN_CURVE,
> +							&asus->cpu_fan_curve.quiet,
> +                            ASUS_THROTTLE_THERMAL_POLICY_SILENT);
> +}
> +
> +static DEVICE_ATTR_RW(cpu_fan_curve_quiet);
> +
> +/*
> + * GPU Fan Curves
> +*/
> +
> +static ssize_t gpu_fan_curve_balanced_show(struct device *dev,
> +				   struct device_attribute *attr, char *buf)
> +{
> +	struct asus_wmi *asus = dev_get_drvdata(dev);
> +	return scnprintf(buf, PAGE_SIZE, "%s\n", 
> asus->gpu_fan_curve.balanced);
> +}
> +
> +static ssize_t gpu_fan_curve_balanced_store(struct device *dev,
> +				    struct device_attribute *attr,
> +				    const char *buf, size_t count)
> +{
> +    struct asus_wmi *asus = dev_get_drvdata(dev);
> +    return fan_curve_store(asus, buf, count, 
> ASUS_WMI_DEVID_GPU_FAN_CURVE,
> +							&asus->gpu_fan_curve.balanced,
> +                            ASUS_THROTTLE_THERMAL_POLICY_DEFAULT);
> +}
> +
> +static DEVICE_ATTR_RW(gpu_fan_curve_balanced);
> +
> +static ssize_t gpu_fan_curve_performance_show(struct device *dev,
> +				   struct device_attribute *attr, char *buf)
> +{
> +	struct asus_wmi *asus = dev_get_drvdata(dev);
> +	return scnprintf(buf, PAGE_SIZE, "%s\n", 
> asus->gpu_fan_curve.performance);
> +}
> +
> +static ssize_t gpu_fan_curve_performance_store(struct device *dev,
> +				    struct device_attribute *attr,
> +				    const char *buf, size_t count)
> +{
> +    struct asus_wmi *asus = dev_get_drvdata(dev);
> +    return fan_curve_store(asus, buf, count, 
> ASUS_WMI_DEVID_GPU_FAN_CURVE,
> +							&asus->gpu_fan_curve.performance,
> +                            ASUS_THROTTLE_THERMAL_POLICY_OVERBOOST);
> +}
> +
> +static DEVICE_ATTR_RW(gpu_fan_curve_performance);
> +
> +static ssize_t gpu_fan_curve_quiet_show(struct device *dev,
> +				   struct device_attribute *attr, char *buf)
> +{
> +	struct asus_wmi *asus = dev_get_drvdata(dev);
> +	return scnprintf(buf, PAGE_SIZE, "%s\n", asus->gpu_fan_curve.quiet);
> +}
> +
> +static ssize_t gpu_fan_curve_quiet_store(struct device *dev,
> +				    struct device_attribute *attr,
> +				    const char *buf, size_t count)
> +{
> +    struct asus_wmi *asus = dev_get_drvdata(dev);
> +    return fan_curve_store(asus, buf, count, 
> ASUS_WMI_DEVID_GPU_FAN_CURVE,
> +							&asus->gpu_fan_curve.quiet,
> +                            ASUS_THROTTLE_THERMAL_POLICY_SILENT);
> +}
> +
> +static DEVICE_ATTR_RW(gpu_fan_curve_quiet);
> +
>  /* Throttle thermal policy 
> ****************************************************/
> 
>  static int throttle_thermal_policy_check_present(struct asus_wmi 
> *asus)
> @@ -2067,6 +2504,53 @@ static int 
> throttle_thermal_policy_check_present(struct asus_wmi *asus)
>  	return 0;
>  }
> 
> +static int throttle_thermal_policy_write_cpu_curves(struct asus_wmi 
> *asus)
> +{
> +	char *curve = NULL;
> +	int err, mode;
> +
> +	mode = asus->throttle_thermal_policy_mode;
> +
> +	if (mode == ASUS_THROTTLE_THERMAL_POLICY_DEFAULT) {
> +		curve = asus->cpu_fan_curve.balanced;
> +	} else if (mode == ASUS_THROTTLE_THERMAL_POLICY_OVERBOOST) {
> +		curve = asus->cpu_fan_curve.performance;
> +	} else if (mode == ASUS_THROTTLE_THERMAL_POLICY_SILENT) {
> +		curve = asus->cpu_fan_curve.quiet;
> +	}
> +
> +	if (curve != NULL) {
> +		err = fan_curve_write(asus, ASUS_WMI_DEVID_CPU_FAN_CURVE, curve);
> +		if (err)
> +			return err;
> +	}
> +	return 0;
> +}
> +
> +
> +static int throttle_thermal_policy_write_gpu_curves(struct asus_wmi 
> *asus)
> +{
> +	char *curve = NULL;
> +	int err, mode;
> +
> +	mode = asus->throttle_thermal_policy_mode;
> +
> +	if (mode == ASUS_THROTTLE_THERMAL_POLICY_DEFAULT) {
> +		curve = asus->gpu_fan_curve.balanced;
> +	} else if (mode == ASUS_THROTTLE_THERMAL_POLICY_OVERBOOST) {
> +		curve = asus->gpu_fan_curve.performance;
> +	} else if (mode == ASUS_THROTTLE_THERMAL_POLICY_SILENT) {
> +		curve = asus->gpu_fan_curve.quiet;
> +	}
> +
> +	if (curve != NULL) {
> +		err = fan_curve_write(asus, ASUS_WMI_DEVID_GPU_FAN_CURVE, curve);
> +		if (err)
> +			return err;
> +	}
> +	return 0;
> +}
> +
>  static int throttle_thermal_policy_write(struct asus_wmi *asus)
>  {
>  	int err;
> @@ -2092,6 +2576,26 @@ static int 
> throttle_thermal_policy_write(struct asus_wmi *asus)
>  		return -EIO;
>  	}
> 
> +	if (asus->cpu_fan_curve_available) {
> +		err = throttle_thermal_policy_write_cpu_curves(asus);
> +		if (err) {
> +			dev_warn(&asus->platform_device->dev,
> +				"Failed to set custom CPU curve for thermal policy: %d\n",
> +				err);
> +			return err;
> +		}
> +	}
> +
> +	if (asus->gpu_fan_curve_available) {
> +		err = throttle_thermal_policy_write_gpu_curves(asus);
> +		if (err) {
> +			dev_warn(&asus->platform_device->dev,
> +				"Failed to set custom GPU curve for thermal policy: %d\n",
> +				err);
> +			return err;
> +		}
> +	}
> +
>  	return 0;
>  }
> 
> @@ -2711,6 +3215,12 @@ static struct attribute *platform_attributes[] 
> = {
>  	&dev_attr_als_enable.attr,
>  	&dev_attr_fan_boost_mode.attr,
>  	&dev_attr_throttle_thermal_policy.attr,
> +	&dev_attr_cpu_fan_curve_balanced.attr,
> +	&dev_attr_cpu_fan_curve_performance.attr,
> +	&dev_attr_cpu_fan_curve_quiet.attr,
> +    &dev_attr_gpu_fan_curve_balanced.attr,
> +	&dev_attr_gpu_fan_curve_performance.attr,
> +	&dev_attr_gpu_fan_curve_quiet.attr,
>  	&dev_attr_panel_od.attr,
>  	NULL
>  };
> @@ -2741,6 +3251,18 @@ static umode_t asus_sysfs_is_visible(struct 
> kobject *kobj,
>  		ok = asus->fan_boost_mode_available;
>  	else if (attr == &dev_attr_throttle_thermal_policy.attr)
>  		ok = asus->throttle_thermal_policy_available;
> +	else if (attr == &dev_attr_cpu_fan_curve_balanced.attr)
> +		ok = asus->cpu_fan_curve_available;
> +	else if (attr == &dev_attr_cpu_fan_curve_performance.attr)
> +		ok = asus->cpu_fan_curve_available;
> +	else if (attr == &dev_attr_cpu_fan_curve_quiet.attr)
> +		ok = asus->cpu_fan_curve_available;
> +    else if (attr == &dev_attr_gpu_fan_curve_balanced.attr)
> +		ok = asus->gpu_fan_curve_available;
> +	else if (attr == &dev_attr_gpu_fan_curve_performance.attr)
> +		ok = asus->gpu_fan_curve_available;
> +	else if (attr == &dev_attr_gpu_fan_curve_quiet.attr)
> +		ok = asus->gpu_fan_curve_available;
>  	else if (attr == &dev_attr_panel_od.attr)
>  		ok = asus->panel_overdrive_available;
> 
> @@ -3016,6 +3538,16 @@ static int asus_wmi_add(struct platform_device 
> *pdev)
>  	else
>  		throttle_thermal_policy_set_default(asus);
> 
> +	err = custom_fan_check_present(asus, &asus->cpu_fan_curve_available,
> +			ASUS_WMI_DEVID_CPU_FAN_CURVE);
> +	if (err)
> +		goto fail_throttle_fan_curve;
> +
> +    err = custom_fan_check_present(asus, 
> &asus->gpu_fan_curve_available,
> +			ASUS_WMI_DEVID_GPU_FAN_CURVE);
> +	if (err)
> +		goto fail_throttle_fan_curve;
> +
>  	err = platform_profile_setup(asus);
>  	if (err)
>  		goto fail_platform_profile_setup;
> @@ -3109,6 +3641,7 @@ static int asus_wmi_add(struct platform_device 
> *pdev)
>  	asus_wmi_sysfs_exit(asus->platform_device);
>  fail_sysfs:
>  fail_throttle_thermal_policy:
> +fail_throttle_fan_curve:
>  fail_platform_profile_setup:
>  	if (asus->platform_profile_support)
>  		platform_profile_remove();
> diff --git a/include/linux/platform_data/x86/asus-wmi.h 
> b/include/linux/platform_data/x86/asus-wmi.h
> index 17dc5cb6f3f2..a571b47ff362 100644
> --- a/include/linux/platform_data/x86/asus-wmi.h
> +++ b/include/linux/platform_data/x86/asus-wmi.h
> @@ -77,6 +77,8 @@
>  #define ASUS_WMI_DEVID_THERMAL_CTRL	0x00110011
>  #define ASUS_WMI_DEVID_FAN_CTRL		0x00110012 /* deprecated */
>  #define ASUS_WMI_DEVID_CPU_FAN_CTRL	0x00110013
> +#define ASUS_WMI_DEVID_CPU_FAN_CURVE	0x00110024
> +#define ASUS_WMI_DEVID_GPU_FAN_CURVE	0x00110025
> 
>  /* Power */
>  #define ASUS_WMI_DEVID_PROCESSOR_STATE	0x00120012
> --
> 2.31.1
> 

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