asus-wmi: Add support for platform_profile

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>
Link: https://lore.kernel.org/r/20210818190731.19170-2-luke@ljones.dev
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
index a87a496..9868e26 100644 (file)
--- 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 90a6a0d..cc58118 100644 (file)
--- 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 @@ fail_input:
        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;
 }