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Date: Mon, 14 Sep 2020 19:02:51 +0200
From: Elia Devito <eliadevito@...il.com>
To: unlisted-recipients:; (no To-header on input)
Cc: Elia Devito <eliadevito@...il.com>,
Darren Hart <dvhart@...radead.org>,
Andy Shevchenko <andy@...radead.org>,
Hans de Goede <hdegoede@...hat.com>,
platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] platform/x86: hp-wmi: add support for thermal policy
HP Spectre notebooks (and probabily other model as well)
support at least 3 thermal policy:
- Default
- Performance
- Cool
the correct thermal policy configuration make the firmware to correctly
set OEM variables for Intel DPTF and optimize fan management to reach
the best performance.
Signed-off-by: Elia Devito <eliadevito@...il.com>
---
drivers/platform/x86/hp-wmi.c | 80 +++++++++++++++++++++++++++++++++++
1 file changed, 80 insertions(+)
diff --git a/drivers/platform/x86/hp-wmi.c b/drivers/platform/x86/hp-wmi.c
index 1762f335bac9..14ee176f5588 100644
--- a/drivers/platform/x86/hp-wmi.c
+++ b/drivers/platform/x86/hp-wmi.c
@@ -81,6 +81,7 @@ enum hp_wmi_commandtype {
HPWMI_FEATURE2_QUERY = 0x0d,
HPWMI_WIRELESS2_QUERY = 0x1b,
HPWMI_POSTCODEERROR_QUERY = 0x2a,
+ HPWMI_THERMAL_POLICY_QUERY = 0x4c
};
enum hp_wmi_command {
@@ -114,6 +115,12 @@ enum hp_wireless2_bits {
HPWMI_POWER_FW_OR_HW = HPWMI_POWER_BIOS | HPWMI_POWER_HARD,
};
+enum hp_thermal_policy {
+ HP_THERMAL_POLICY_PERFORMANCE = 0x00,
+ HP_THERMAL_POLICY_DEFAULT = 0x01,
+ HP_THERMAL_POLICY_COOL = 0x02
+};
+
#define IS_HWBLOCKED(x) ((x & HPWMI_POWER_FW_OR_HW) != HPWMI_POWER_FW_OR_HW)
#define IS_SWBLOCKED(x) !(x & HPWMI_POWER_SOFT)
@@ -458,6 +465,28 @@ static ssize_t postcode_show(struct device *dev, struct device_attribute *attr,
return sprintf(buf, "0x%x\n", value);
}
+static ssize_t thermal_policy_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ int value;
+
+ /* Get the current thermal policy */
+ value = hp_wmi_read_int(HPWMI_THERMAL_POLICY_QUERY);
+ if (value < 0)
+ return value;
+
+ switch (value) {
+ case HP_THERMAL_POLICY_PERFORMANCE:
+ return sprintf(buf, "Performance (%x)\n", value);
+ case HP_THERMAL_POLICY_DEFAULT:
+ return sprintf(buf, "Default (%x)\n", value);
+ case HP_THERMAL_POLICY_COOL:
+ return sprintf(buf, "Cool (%x)\n", value);
+ default:
+ return sprintf(buf, "Unknown (%x)\n", value);
+ }
+}
+
static ssize_t als_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
@@ -499,12 +528,35 @@ static ssize_t postcode_store(struct device *dev, struct device_attribute *attr,
return count;
}
+static ssize_t thermal_policy_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ u32 tmp;
+ int ret;
+
+ ret = kstrtou32(buf, 10, &tmp);
+ if (ret)
+ return ret;
+
+ if (tmp < HP_THERMAL_POLICY_PERFORMANCE || tmp > HP_THERMAL_POLICY_COOL)
+ return -EINVAL;
+
+ /* Set thermal policy */
+ ret = hp_wmi_perform_query(HPWMI_THERMAL_POLICY_QUERY, HPWMI_WRITE, &tmp,
+ sizeof(tmp), sizeof(tmp));
+ if (ret)
+ return ret < 0 ? ret : -EINVAL;
+
+ return count;
+}
+
static DEVICE_ATTR_RO(display);
static DEVICE_ATTR_RO(hddtemp);
static DEVICE_ATTR_RW(als);
static DEVICE_ATTR_RO(dock);
static DEVICE_ATTR_RO(tablet);
static DEVICE_ATTR_RW(postcode);
+static DEVICE_ATTR_RW(thermal_policy);
static struct attribute *hp_wmi_attrs[] = {
&dev_attr_display.attr,
@@ -861,6 +913,30 @@ static int __init hp_wmi_rfkill2_setup(struct platform_device *device)
return err;
}
+static int thermal_policy_setup(struct platform_device *device)
+{
+ int err, tp;
+
+ tp = hp_wmi_read_int(HPWMI_THERMAL_POLICY_QUERY);
+ if (tp < 0)
+ return tp;
+
+ /*
+ * set thermal policy to ensure that the firmware correctly
+ * sets the OEM variables for the DPTF
+ */
+ err = hp_wmi_perform_query(HPWMI_THERMAL_POLICY_QUERY, HPWMI_WRITE, &tp,
+ sizeof(tp), 0);
+ if (err)
+ return err;
+
+ err = device_create_file(&device->dev, &dev_attr_thermal_policy);
+ if (err)
+ return err;
+
+ return 0;
+}
+
static int __init hp_wmi_bios_setup(struct platform_device *device)
{
/* clear detected rfkill devices */
@@ -872,6 +948,8 @@ static int __init hp_wmi_bios_setup(struct platform_device *device)
if (hp_wmi_rfkill_setup(device))
hp_wmi_rfkill2_setup(device);
+ thermal_policy_setup(device);
+
return 0;
}
@@ -879,6 +957,8 @@ static int __exit hp_wmi_bios_remove(struct platform_device *device)
{
int i;
+ device_remove_file(&device->dev, &dev_attr_thermal_policy);
+
for (i = 0; i < rfkill2_count; i++) {
rfkill_unregister(rfkill2[i].rfkill);
rfkill_destroy(rfkill2[i].rfkill);
--
2.26.2
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