Re: [PATCH v5] asus-wmi: Add support for custom fan curves
From: Guenter Roeck
Date: Fri Aug 27 2021 - 12:06:02 EST
On 8/27/21 8:26 AM, Barnabás Pőcze wrote:
Hi
+CC Guenter Roeck as he may be able to tell us if there's an established
way to export fan curves.
If I understand the context correctly, one would normally define pairs
of pwmX_auto_pointN_temp and pwmX_auto_pointN_pwm, with _temp
being the temperature in milli-degrees C and _pwm being a pwm value
between 0 and 255. Normally the X would refer to different fans/pwm
channels, but one could "tweak" that and declare that pwm1 is quiet,
pwm2 is default, and pwm3 is performance. One could then use pwm1_enable
values (2..4) to select the active mode.
The format isn't documented here, though, so it is hard to say if that
would be a good match. And I won't start analyzing the code trying
to understand in detail what it actually does.
Guenter
I have added a couple comments.
There are places where spaces are used instead of tabs.
2021. augusztus 27., péntek 1:42 keltezéssel, Luke D. Jones írta:
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@xxxxxxxxxx>
---
drivers/platform/x86/asus-wmi.c | 616 ++++++++++++++++++++-
include/linux/platform_data/x86/asus-wmi.h | 2 +
2 files changed, 616 insertions(+), 2 deletions(-)
diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
index cc5811844012..944644ae0acd 100644
--- a/drivers/platform/x86/asus-wmi.c
+++ b/drivers/platform/x86/asus-wmi.c
@@ -108,6 +108,11 @@ 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 ssize_t fan_curve_store(struct asus_wmi *asus, const char *buf,
+ size_t count, u32 dev, char **curve,
+ char *default_curve);
+
static bool ashs_present(void)
{
int i = 0;
@@ -122,7 +127,8 @@ struct bios_args {
u32 arg0;
u32 arg1;
u32 arg2; /* At least TUF Gaming series uses 3 dword input buffer. */
- u32 arg4;
+ u32 arg3;
+ u32 arg4; /* Some ROG laptops require a full 5 input args */
u32 arg5;
} __packed;
@@ -173,6 +179,21 @@ enum fan_type {
FAN_TYPE_SPEC83, /* starting in Spec 8.3, use CPU_FAN_CTRL */
};
+struct fan_curve {
+ char *balanced;
+ char *balanced_default;
+ char *performance;
+ char *performance_default;
+ char *quiet;
+ char *quiet_default;
+};
+
+struct enabled_fan_curves {
+ bool balanced;
+ bool performance;
+ bool quiet;
+};
+
struct asus_wmi {
int dsts_id;
int spec;
@@ -220,6 +241,14 @@ 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 enabled_fan_curves enabled_fan_curve_profiles;
I would suggest something like the following:
struct fan_curve {
/* bool enabled; */
u8 temps[FAN_CURVE_SIZE];
u8 percents[FAN_CURVE_SIZE];
};
struct fan {
bool available;
struct fan_curve curves[NUM_PERF_PROFILES];
};
struct asus_wmi {
...
struct fan fans[NUM_FANS];
bool fan_curve_enabled_for_profile[NUM_PERF_PROFILES];
/* or maybe you could add it as `bool enabled;` into the inner struct */
};
see the reason later.
+
struct platform_profile_handler platform_profile_handler;
bool platform_profile_support;
@@ -285,6 +314,85 @@ 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;
Small thing, but this cast is unnecessary.
+ if (obj && obj->type == ACPI_TYPE_INTEGER)
+ tmp = (u32) obj->integer.value;
Same here.
+
+ 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) {
+ 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;
@@ -1813,7 +1921,7 @@ static ssize_t fan1_label_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
- return sprintf(buf, "%s\n", ASUS_FAN_DESC);
+ return sprintf(buf, "%s", ASUS_FAN_DESC);
What is the reason for this change?
}
static ssize_t asus_hwmon_temp1(struct device *dev,
@@ -2043,6 +2151,458 @@ 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 **********************************************/
+
+/*
+ * Check if the ability to set fan curves on either fan exists, and store the
+ * defaults for recall later plus to provide users with a starting point.
+ *
+ * "dev" is either CPU_FAN_CURVE or GPU_FAN_CURVE.
+*/
+static int custom_fan_check_present(struct asus_wmi *asus,
+ bool *available, u32 dev)
+{
+ struct fan_curve *curves = &asus->cpu_fan_curve;
+ u8 *buf = kzalloc(16 * sizeof(u8), GFP_KERNEL);
Is dynamic allocation needed here? No early return frees it.
+ /* 15 punctuation marks + 16 sets of numbers up to 3 char each */
+ int str_len = 15 + 16 * 3;
It appears to me that the terminating null byte is not accounted for. E.g.:
255:255,255:255,255:255,255:255,255:255,255:255,255:255,255:255
is itself already 63 (= 15 + 16 x 3) characters.
And if the maximum length is known, and it's reasonably small, why is it not
part of the struct as a char array? E.g.:
struct fan_curve {
char balanced[FAN_CURVE_STR_SIZE]; /* #define FAN_CURVE_STR_SIZE 64 */
...
};
I would actually suggest storing the u8 array itself in the fan curve struct,
and not a string representation of it. I think the data is easier to deal with
that way, and the price of formatting it for the sysfs attribute is not
significant.
+ 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, buf);
+ if (err) {
+ if (err == -ENODEV)
+ return 0;
+ return err;
+ }
+
+ curves->balanced = kzalloc(str_len * sizeof(char), GFP_KERNEL);
+ if (!curves->balanced)
+ return -ENOMEM;
+
+ curves->balanced_default = kzalloc(str_len * sizeof(char), GFP_KERNEL);
+ if (!curves->balanced_default)
+ return -ENOMEM;
+
+ sprintf(curves->balanced, "%d:%d,%d:%d,%d:%d,%d:%d,%d:%d,%d:%d,%d:%d,%d:%d",
+ buf[0], buf[8], buf[1], buf[9], buf[2], buf[10], buf[3], buf[11],
+ buf[4], buf[12], buf[5], buf[13], buf[6], buf[14], buf[7], buf[15]);
+ sprintf(curves->balanced_default, curves->balanced);
+
+ /* Quiet default */
+ err = asus_wmi_evaluate_method_buf(asus->dsts_id, dev, 1, buf);
+ if (err) {
+ if (err == -ENODEV)
+ return 0;
+ return err;
+ }
+
+ curves->quiet = kzalloc(str_len * sizeof(char), GFP_KERNEL);
+ if (!curves->quiet)
+ return -ENOMEM;
+
+ curves->quiet_default = kzalloc(str_len * sizeof(char), GFP_KERNEL);
+ if (!curves->quiet_default)
+ return -ENOMEM;
+
+ sprintf(curves->quiet, "%d:%d,%d:%d,%d:%d,%d:%d,%d:%d,%d:%d,%d:%d,%d:%d",
+ buf[0], buf[8], buf[1], buf[9], buf[2], buf[10], buf[3], buf[11],
+ buf[4], buf[12], buf[5], buf[13], buf[6], buf[14], buf[7], buf[15]);
+ sprintf(curves->quiet_default, curves->quiet);
+
+ /* Performance default */
+ err = asus_wmi_evaluate_method_buf(asus->dsts_id, dev, 2, buf);
+ if (err) {
+ if (err == -ENODEV)
+ return 0;
+ return err;
+ }
+
+ curves->performance = kzalloc(str_len * sizeof(char), GFP_KERNEL);
+ if (!curves->performance)
+ return -ENOMEM;
+
+ curves->performance_default = kzalloc(str_len * sizeof(char), GFP_KERNEL);
+ if (!curves->performance_default)
+ return -ENOMEM;
+
+ sprintf(curves->performance,
+ "%d:%d,%d:%d,%d:%d,%d:%d,%d:%d,%d:%d,%d:%d,%d:%d",
+ buf[0], buf[8], buf[1], buf[9], buf[2], buf[10], buf[3], buf[11],
+ buf[4], buf[12], buf[5], buf[13], buf[6], buf[14], buf[7], buf[15]);
+ sprintf(curves->performance_default, curves->performance);
More or less the same code is repeated three times, I'd consider adding an e.g.
void fan_curve_to_str(..., char[static FAN_CURVE_STR_SIZE]);
function.
+
+ kfree(buf);
+
+ *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_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 prev_percent = 0;
+ u32 prev_temp = 0;
+ 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 (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;
+
+ if (!half_complete) {
+ arg1 += temp << shift;
+ arg3 += percent << shift;
+ } else {
+ arg2 += temp << shift;
+ arg4 += percent << shift;
+ }
As far as I see using 64-bit integers would avoid the need for `half_complete`, et al.
+ shift += 8;
+
+ if (shift == 32) {
+ shift = 0;
+ half_complete = true;
+ }
+ }
+ kfree(buf);
+
If you don't insist on using commas, I think it is much simpler to
parse it using `sscanf()`, e.g.:
unsigned int temp, prct;
int at = 0, len;
while (sscanf(&buf[at], "%u:%u %n", &temp, &prct, &len) == 2) {
/* process `temp` and `prct` */
at += len;
}
if (buf[at] != '\0')
/* error */;
This also has the advantage that you don't need dynamic memory allocation.
+ return asus_wmi_evaluate_method5(ASUS_WMI_METHODID_DEVS, dev,
+ arg1, arg2, arg3, arg4, &ret);
+}
+
+static int fan_curve_cpu_write(struct asus_wmi *asus)
+{
+ char *curve = NULL;
+ int err, mode;
+
+ mode = asus->throttle_thermal_policy_mode;
+
+ if (mode == ASUS_THROTTLE_THERMAL_POLICY_DEFAULT
+ && asus->enabled_fan_curve_profiles.balanced) {
+ curve = asus->cpu_fan_curve.balanced;
+ } else if (mode == ASUS_THROTTLE_THERMAL_POLICY_OVERBOOST
+ && asus->enabled_fan_curve_profiles.performance) {
+ curve = asus->cpu_fan_curve.performance;
+ } else if (mode == ASUS_THROTTLE_THERMAL_POLICY_SILENT
+ && asus->enabled_fan_curve_profiles.quiet) {
+ 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 fan_curve_gpu_write(struct asus_wmi *asus)
+{
+ char *curve = NULL;
+ int err, mode;
+
+ mode = asus->throttle_thermal_policy_mode;
+
+ if (mode == ASUS_THROTTLE_THERMAL_POLICY_DEFAULT
+ && asus->enabled_fan_curve_profiles.balanced) {
+ curve = asus->gpu_fan_curve.balanced;
+ } else if (mode == ASUS_THROTTLE_THERMAL_POLICY_OVERBOOST
+ && asus->enabled_fan_curve_profiles.performance) {
+ curve = asus->gpu_fan_curve.performance;
+ } else if (mode == ASUS_THROTTLE_THERMAL_POLICY_SILENT
+ && asus->enabled_fan_curve_profiles.quiet) {
+ 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 ssize_t fan_curve_store(struct asus_wmi *asus, const char *buf,
+ size_t count, u32 dev, char **curve,
+ char *default_curve)
+{
+ int err;
+
+ /* Allow a user to write "" or " " to erase a curve setting */
+ if (strlen(buf) <= 1 || strcmp(buf, " \n") == 0) {
+ kfree(*curve);
+ *curve = kstrdup(default_curve, GFP_KERNEL);
+ err = throttle_thermal_policy_write(asus);
+ if (err)
+ return err;
+ return count;
+ }
+
+ if (*curve)
+ kfree(*curve);
+ *curve = kstrdup(buf, GFP_KERNEL);
+
+ /* Maybe activate fan curve if in associated mode */
+ err = throttle_thermal_policy_write(asus);
+ if (err) {
+ kfree(*curve);
+ *curve = kstrdup(default_curve, GFP_KERNEL);
+ 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", 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->cpu_fan_curve.balanced_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", 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->cpu_fan_curve.performance_default);
+}
+
+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", 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->cpu_fan_curve.quiet_default);
+}
+
+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", 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->gpu_fan_curve.balanced_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", 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->gpu_fan_curve.performance_default);
+}
+
+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", 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->gpu_fan_curve.quiet_default);
+}
+
+static DEVICE_ATTR_RW(gpu_fan_curve_quiet);
Even though it is a hwmon thing, I think `SENSOR_ATTR_2()` (from linux/hwmon-sysfs.h)
would be very useful here as you'd avoid creating n+1 functions, e.g:
static ssize_t fan_curve_show(struct device *dev, struct device_attribute *attr, char *buf)
{
struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
struct asus_wmi *asus = dev_get_drvdata(dev);
/*
* if you stored fan curves in an array, you could then access the fan
* curve in `asus->fans[sattr->index].curves[sattr->nr]`
* /
}
static SENSOR_DEVICE_ATTR_2(some_name1, 0644, fan_curve_show, fan_curve_store,
FAN_CPU /* index in the "fans" array */,
ASUS_THROTTLE_THERMAL_POLICY_SILENT /* index in the "curves" array */);
+
+/*
+ * Profiles with enabled fan curve setting
+*/
+
+static int enabled_fan_curve_profiles_write(struct asus_wmi *asus,
+ const char *names)
+{
+ char *buf, *set, *set_end;
+ int err;
+
+ buf = set_end = kstrdup(names, GFP_KERNEL);
+
+ /* Reset before checking */
+ asus->enabled_fan_curve_profiles.balanced = false;
+ asus->enabled_fan_curve_profiles.quiet = false;
+ asus->enabled_fan_curve_profiles.performance = false;
+
+ while( (set = strsep(&set_end, " ")) != NULL ) {
+ if (set == NULL)
When is this possible?
+ set = buf;
+
+ if (strcmp(set, "balanced") == 0
+ || strcmp(set, "balanced\n") == 0)
+ asus->enabled_fan_curve_profiles.balanced = true;
+
+ if (strcmp(set, "quiet") == 0
+ || strcmp(set, "quiet\n") == 0)
+ asus->enabled_fan_curve_profiles.quiet = true;
+
+ if (strcmp(set, "performance") == 0
+ || strcmp(set, "performance\n") == 0)
+ asus->enabled_fan_curve_profiles.performance = true;
If you store the enabled curves in an array, and you have a list of profile names,
then `sysfs_match_string()`, will be very helpful here. You could do something like:
int profile = sysfs_match_string(profile_names, set);
if (profile < 0) {
/* not found */
}
asus->fan_curve_enabled_for_profile[profile] = true;
+ }
+
+ err = throttle_thermal_policy_write(asus);
+ if (err)
+ return err;
+
+ kfree(buf);
+
+ return 0;
+}
+
+static ssize_t enabled_fan_curve_profiles_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct asus_wmi *asus = dev_get_drvdata(dev);
+ int len = 0;
+
+ if (asus->enabled_fan_curve_profiles.balanced)
+ len += sysfs_emit_at(buf, len, "balanced ");
+
+ if (asus->enabled_fan_curve_profiles.performance)
+ len += sysfs_emit_at(buf, len, "performance ");
+
+ if (asus->enabled_fan_curve_profiles.quiet)
+ len += sysfs_emit_at(buf, len, "quiet ");
+
+ len += sysfs_emit_at(buf, len, "\n");
+ return len;
+}
+
+static ssize_t enabled_fan_curve_profiles_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct asus_wmi *asus = dev_get_drvdata(dev);
+ int err;
+
+ err = enabled_fan_curve_profiles_write(asus, buf);
+ if (err)
+ return err;
+
+ return count;
+}
+
+static DEVICE_ATTR_RW(enabled_fan_curve_profiles);
+
/* Throttle thermal policy ****************************************************/
static int throttle_thermal_policy_check_present(struct asus_wmi *asus)
@@ -2092,6 +2652,26 @@ static int throttle_thermal_policy_write(struct asus_wmi *asus)
return -EIO;
}
+ if (asus->cpu_fan_curve_available) {
+ err = fan_curve_cpu_write(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 = fan_curve_gpu_write(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 +3291,13 @@ 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_enabled_fan_curve_profiles.attr,
&dev_attr_panel_od.attr,
NULL
};
@@ -2741,6 +3328,20 @@ 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_enabled_fan_curve_profiles.attr)
+ ok = asus->cpu_fan_curve_available || asus->gpu_fan_curve_available;
else if (attr == &dev_attr_panel_od.attr)
ok = asus->panel_overdrive_available;
@@ -3016,6 +3617,16 @@ 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_custom_fan_curve;
+
+ err = custom_fan_check_present(asus, &asus->gpu_fan_curve_available,
+ ASUS_WMI_DEVID_GPU_FAN_CURVE);
+ if (err)
+ goto fail_custom_fan_curve;
+
err = platform_profile_setup(asus);
if (err)
goto fail_platform_profile_setup;
@@ -3109,6 +3720,7 @@ static int asus_wmi_add(struct platform_device *pdev)
asus_wmi_sysfs_exit(asus->platform_device);
fail_sysfs:
fail_throttle_thermal_policy:
+fail_custom_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
Best regards,
Barnabás Pőcze