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Subject[PATCH v5 1/1] asus-wmi: Add support for platform_profile
Date
Add initial support for platform_profile where the support is
based on availability of ASUS_THROTTLE_THERMAL_POLICY.

Because throttle_thermal_policy is used by platform_profile and is
writeable separately to platform_profile any userspace changes to
throttle_thermal_policy need to notify platform_profile.

In future throttle_thermal_policy sysfs should be removed so that
only one method controls the laptop power profile.

Signed-off-by: Luke D. Jones <luke@ljones.dev>
---
drivers/platform/x86/Kconfig | 1 +
drivers/platform/x86/asus-wmi.c | 130 +++++++++++++++++++++++++++++++-
2 files changed, 127 insertions(+), 4 deletions(-)

diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
index d12db6c316ea..46dec48a36c1 100644
--- a/drivers/platform/x86/Kconfig
+++ b/drivers/platform/x86/Kconfig
@@ -281,6 +281,7 @@ config ASUS_WMI
select INPUT_SPARSEKMAP
select LEDS_CLASS
select NEW_LEDS
+ select ACPI_PLATFORM_PROFILE
help
Say Y here if you have a WMI aware Asus laptop (like Eee PCs or new
Asus Notebooks).
diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
index 90a6a0d00deb..cc5811844012 100644
--- a/drivers/platform/x86/asus-wmi.c
+++ b/drivers/platform/x86/asus-wmi.c
@@ -26,6 +26,7 @@
#include <linux/rfkill.h>
#include <linux/pci.h>
#include <linux/pci_hotplug.h>
+#include <linux/platform_profile.h>
#include <linux/power_supply.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
@@ -219,6 +220,9 @@ struct asus_wmi {
bool throttle_thermal_policy_available;
u8 throttle_thermal_policy_mode;

+ struct platform_profile_handler platform_profile_handler;
+ bool platform_profile_support;
+
// The RSOC controls the maximum charging percentage.
bool battery_rsoc_available;

@@ -2103,12 +2107,23 @@ static int throttle_thermal_policy_set_default(struct asus_wmi *asus)
static int throttle_thermal_policy_switch_next(struct asus_wmi *asus)
{
u8 new_mode = asus->throttle_thermal_policy_mode + 1;
+ int err;

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);
+ err = throttle_thermal_policy_write(asus);
+ if (err)
+ return err;
+
+ /*
+ * Ensure that platform_profile updates userspace with the change to ensure
+ * that platform_profile and throttle_thermal_policy_mode are in sync.
+ */
+ platform_profile_notify();
+
+ return 0;
}

static ssize_t throttle_thermal_policy_show(struct device *dev,
@@ -2124,9 +2139,10 @@ 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);
+ u8 new_mode;
+ int result;
+ int err;

result = kstrtou8(buf, 10, &new_mode);
if (result < 0)
@@ -2136,7 +2152,15 @@ static ssize_t throttle_thermal_policy_store(struct device *dev,
return -EINVAL;

asus->throttle_thermal_policy_mode = new_mode;
- throttle_thermal_policy_write(asus);
+ err = throttle_thermal_policy_write(asus);
+ if (err)
+ return err;
+
+ /*
+ * Ensure that platform_profile updates userspace with the change to ensure
+ * that platform_profile and throttle_thermal_policy_mode are in sync.
+ */
+ platform_profile_notify();

return count;
}
@@ -2144,6 +2168,94 @@ static ssize_t throttle_thermal_policy_store(struct device *dev,
// Throttle thermal policy: 0 - default, 1 - overboost, 2 - silent
static DEVICE_ATTR_RW(throttle_thermal_policy);

+/* Platform profile ***********************************************************/
+static int platform_profile_get(struct platform_profile_handler *pprof,
+ enum platform_profile_option *profile)
+{
+ struct asus_wmi *asus;
+ int tp;
+
+ asus = container_of(pprof, struct asus_wmi, platform_profile_handler);
+
+ tp = asus->throttle_thermal_policy_mode;
+
+ if (tp < 0)
+ return tp;
+
+ switch (tp) {
+ case ASUS_THROTTLE_THERMAL_POLICY_DEFAULT:
+ *profile = PLATFORM_PROFILE_BALANCED;
+ break;
+ case ASUS_THROTTLE_THERMAL_POLICY_OVERBOOST:
+ *profile = PLATFORM_PROFILE_PERFORMANCE;
+ break;
+ case ASUS_THROTTLE_THERMAL_POLICY_SILENT:
+ *profile = PLATFORM_PROFILE_QUIET;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int platform_profile_set(struct platform_profile_handler *pprof,
+ enum platform_profile_option profile)
+{
+ struct asus_wmi *asus;
+ int tp;
+
+ asus = container_of(pprof, struct asus_wmi, platform_profile_handler);
+
+ switch (profile) {
+ case PLATFORM_PROFILE_PERFORMANCE:
+ tp = ASUS_THROTTLE_THERMAL_POLICY_OVERBOOST;
+ break;
+ case PLATFORM_PROFILE_BALANCED:
+ tp = ASUS_THROTTLE_THERMAL_POLICY_DEFAULT;
+ break;
+ case PLATFORM_PROFILE_QUIET:
+ tp = ASUS_THROTTLE_THERMAL_POLICY_SILENT;
+ break;
+ default:
+ return -EOPNOTSUPP;
+ }
+
+ asus->throttle_thermal_policy_mode = tp;
+ return throttle_thermal_policy_write(asus);
+}
+
+static int platform_profile_setup(struct asus_wmi *asus)
+{
+ struct device *dev = &asus->platform_device->dev;
+ int err;
+
+ /*
+ * Not an error if a component platform_profile relies on is unavailable
+ * so early return, skipping the setup of platform_profile.
+ */
+ if (!asus->throttle_thermal_policy_available)
+ return 0;
+
+ dev_info(dev, "Using throttle_thermal_policy for platform_profile support\n");
+
+ asus->platform_profile_handler.profile_get = platform_profile_get;
+ asus->platform_profile_handler.profile_set = platform_profile_set;
+
+ set_bit(PLATFORM_PROFILE_QUIET, asus->platform_profile_handler.choices);
+ set_bit(PLATFORM_PROFILE_BALANCED,
+ asus->platform_profile_handler.choices);
+ set_bit(PLATFORM_PROFILE_PERFORMANCE,
+ asus->platform_profile_handler.choices);
+
+ err = platform_profile_register(&asus->platform_profile_handler);
+ if (err)
+ return err;
+
+ asus->platform_profile_support = true;
+ return 0;
+}
+
/* Backlight ******************************************************************/

static int read_backlight_power(struct asus_wmi *asus)
@@ -2904,6 +3016,10 @@ static int asus_wmi_add(struct platform_device *pdev)
else
throttle_thermal_policy_set_default(asus);

+ err = platform_profile_setup(asus);
+ if (err)
+ goto fail_platform_profile_setup;
+
err = panel_od_check_present(asus);
if (err)
goto fail_panel_od;
@@ -2993,6 +3109,9 @@ static int asus_wmi_add(struct platform_device *pdev)
asus_wmi_sysfs_exit(asus->platform_device);
fail_sysfs:
fail_throttle_thermal_policy:
+fail_platform_profile_setup:
+ if (asus->platform_profile_support)
+ platform_profile_remove();
fail_fan_boost_mode:
fail_egpu_enable:
fail_dgpu_disable:
@@ -3017,6 +3136,9 @@ static int asus_wmi_remove(struct platform_device *device)
asus_fan_set_auto(asus);
asus_wmi_battery_exit(asus);

+ if (asus->platform_profile_support)
+ platform_profile_remove();
+
kfree(asus);
return 0;
}
--
2.31.1
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