platform/x86: asus-wmi: expose dGPU and CPU tunables for ROG

Expose various CPU and dGPU tunables that are available on many ASUS
ROG laptops. The tunables shown in sysfs will vary depending on the CPU
and dGPU vendor.

All of these variables are write only and there is no easy way to find
what the defaults are. In general they seem to default to the max value
the vendor sets for the CPU and dGPU package - this is not the same as
the min/max writable value. Values written to these variables that are
beyond the capabilities of the CPU are ignored by the laptop.

Signed-off-by: Luke D. Jones <luke@ljones.dev>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20230630053552.976579-9-luke@ljones.dev
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

1 files changed, 285 insertions, 0 deletions

diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
index ad38ba710d9b..9805072efd5a 100644
--- a/drivers/platform/x86/asus-wmi.c
+++ b/drivers/platform/x86/asus-wmi.c
@@ -117,6 +117,16 @@ module_param(fnlock_default, bool, 0444);
 /* Mask to determine if setting temperature or percentage */
 #define FAN_CURVE_PWM_MASK		0x04
 
+/* Limits for tunables available on ASUS ROG laptops */
+#define PPT_TOTAL_MIN		5
+#define PPT_TOTAL_MAX		250
+#define PPT_CPU_MIN			5
+#define PPT_CPU_MAX			130
+#define NVIDIA_BOOST_MIN	5
+#define NVIDIA_BOOST_MAX	25
+#define NVIDIA_TEMP_MIN		75
+#define NVIDIA_TEMP_MAX		87
+
 static const char * const ashs_ids[] = { "ATK4001", "ATK4002", NULL };
 
 static int throttle_thermal_policy_write(struct asus_wmi *);
@@ -247,6 +257,15 @@ struct asus_wmi {
 	bool dgpu_disable_available;
 	bool gpu_mux_mode_available;
 
+	/* Tunables provided by ASUS for gaming laptops */
+	bool ppt_pl2_sppt_available;
+	bool ppt_pl1_spl_available;
+	bool ppt_apu_sppt_available;
+	bool ppt_plat_sppt_available;
+	bool ppt_fppt_available;
+	bool nv_dyn_boost_available;
+	bool nv_temp_tgt_available;
+
 	bool kbd_rgb_mode_available;
 	bool kbd_rgb_state_available;
 
@@ -946,6 +965,244 @@ static const struct attribute_group *kbd_rgb_mode_groups[] = {
 	NULL,
 };
 
+/* Tunable: PPT: Intel=PL1, AMD=SPPT *****************************************/
+static ssize_t ppt_pl2_sppt_store(struct device *dev,
+				    struct device_attribute *attr,
+				    const char *buf, size_t count)
+{
+	int result, err;
+	u32 value;
+
+	struct asus_wmi *asus = dev_get_drvdata(dev);
+
+	result = kstrtou32(buf, 10, &value);
+	if (result)
+		return result;
+
+	if (value < PPT_TOTAL_MIN || value > PPT_TOTAL_MAX)
+		return -EINVAL;
+
+	err = asus_wmi_set_devstate(ASUS_WMI_DEVID_PPT_PL2_SPPT, value, &result);
+	if (err) {
+		pr_warn("Failed to set ppt_pl2_sppt: %d\n", err);
+		return err;
+	}
+
+	if (result > 1) {
+		pr_warn("Failed to set ppt_pl2_sppt (result): 0x%x\n", result);
+		return -EIO;
+	}
+
+	sysfs_notify(&asus->platform_device->dev.kobj, NULL, "ppt_pl2_sppt");
+
+	return count;
+}
+static DEVICE_ATTR_WO(ppt_pl2_sppt);
+
+/* Tunable: PPT, Intel=PL1, AMD=SPL ******************************************/
+static ssize_t ppt_pl1_spl_store(struct device *dev,
+				    struct device_attribute *attr,
+				    const char *buf, size_t count)
+{
+	int result, err;
+	u32 value;
+
+	struct asus_wmi *asus = dev_get_drvdata(dev);
+
+	result = kstrtou32(buf, 10, &value);
+	if (result)
+		return result;
+
+	if (value < PPT_TOTAL_MIN || value > PPT_TOTAL_MAX)
+		return -EINVAL;
+
+	err = asus_wmi_set_devstate(ASUS_WMI_DEVID_PPT_PL1_SPL, value, &result);
+	if (err) {
+		pr_warn("Failed to set ppt_pl1_spl: %d\n", err);
+		return err;
+	}
+
+	if (result > 1) {
+		pr_warn("Failed to set ppt_pl1_spl (result): 0x%x\n", result);
+		return -EIO;
+	}
+
+	sysfs_notify(&asus->platform_device->dev.kobj, NULL, "ppt_pl1_spl");
+
+	return count;
+}
+static DEVICE_ATTR_WO(ppt_pl1_spl);
+
+/* Tunable: PPT APU FPPT ******************************************************/
+static ssize_t ppt_fppt_store(struct device *dev,
+				    struct device_attribute *attr,
+				    const char *buf, size_t count)
+{
+	int result, err;
+	u32 value;
+
+	struct asus_wmi *asus = dev_get_drvdata(dev);
+
+	result = kstrtou32(buf, 10, &value);
+	if (result)
+		return result;
+
+	if (value < PPT_TOTAL_MIN || value > PPT_TOTAL_MAX)
+		return -EINVAL;
+
+	err = asus_wmi_set_devstate(ASUS_WMI_DEVID_PPT_FPPT, value, &result);
+	if (err) {
+		pr_warn("Failed to set ppt_fppt: %d\n", err);
+		return err;
+	}
+
+	if (result > 1) {
+		pr_warn("Failed to set ppt_fppt (result): 0x%x\n", result);
+		return -EIO;
+	}
+
+	sysfs_notify(&asus->platform_device->dev.kobj, NULL, "ppt_fpu_sppt");
+
+	return count;
+}
+static DEVICE_ATTR_WO(ppt_fppt);
+
+/* Tunable: PPT APU SPPT *****************************************************/
+static ssize_t ppt_apu_sppt_store(struct device *dev,
+				    struct device_attribute *attr,
+				    const char *buf, size_t count)
+{
+	int result, err;
+	u32 value;
+
+	struct asus_wmi *asus = dev_get_drvdata(dev);
+
+	result = kstrtou32(buf, 10, &value);
+	if (result)
+		return result;
+
+	if (value < PPT_CPU_MIN || value > PPT_CPU_MAX)
+		return -EINVAL;
+
+	err = asus_wmi_set_devstate(ASUS_WMI_DEVID_PPT_APU_SPPT, value, &result);
+	if (err) {
+		pr_warn("Failed to set ppt_apu_sppt: %d\n", err);
+		return err;
+	}
+
+	if (result > 1) {
+		pr_warn("Failed to set ppt_apu_sppt (result): 0x%x\n", result);
+		return -EIO;
+	}
+
+	sysfs_notify(&asus->platform_device->dev.kobj, NULL, "ppt_apu_sppt");
+
+	return count;
+}
+static DEVICE_ATTR_WO(ppt_apu_sppt);
+
+/* Tunable: PPT platform SPPT ************************************************/
+static ssize_t ppt_platform_sppt_store(struct device *dev,
+				    struct device_attribute *attr,
+				    const char *buf, size_t count)
+{
+	int result, err;
+	u32 value;
+
+	struct asus_wmi *asus = dev_get_drvdata(dev);
+
+	result = kstrtou32(buf, 10, &value);
+	if (result)
+		return result;
+
+	if (value < PPT_CPU_MIN || value > PPT_CPU_MAX)
+		return -EINVAL;
+
+	err = asus_wmi_set_devstate(ASUS_WMI_DEVID_PPT_PLAT_SPPT, value, &result);
+	if (err) {
+		pr_warn("Failed to set ppt_platform_sppt: %d\n", err);
+		return err;
+	}
+
+	if (result > 1) {
+		pr_warn("Failed to set ppt_platform_sppt (result): 0x%x\n", result);
+		return -EIO;
+	}
+
+	sysfs_notify(&asus->platform_device->dev.kobj, NULL, "ppt_platform_sppt");
+
+	return count;
+}
+static DEVICE_ATTR_WO(ppt_platform_sppt);
+
+/* Tunable: NVIDIA dynamic boost *********************************************/
+static ssize_t nv_dynamic_boost_store(struct device *dev,
+				    struct device_attribute *attr,
+				    const char *buf, size_t count)
+{
+	int result, err;
+	u32 value;
+
+	struct asus_wmi *asus = dev_get_drvdata(dev);
+
+	result = kstrtou32(buf, 10, &value);
+	if (result)
+		return result;
+
+	if (value < NVIDIA_BOOST_MIN || value > NVIDIA_BOOST_MAX)
+		return -EINVAL;
+
+	err = asus_wmi_set_devstate(ASUS_WMI_DEVID_NV_DYN_BOOST, value, &result);
+	if (err) {
+		pr_warn("Failed to set nv_dynamic_boost: %d\n", err);
+		return err;
+	}
+
+	if (result > 1) {
+		pr_warn("Failed to set nv_dynamic_boost (result): 0x%x\n", result);
+		return -EIO;
+	}
+
+	sysfs_notify(&asus->platform_device->dev.kobj, NULL, "nv_dynamic_boost");
+
+	return count;
+}
+static DEVICE_ATTR_WO(nv_dynamic_boost);
+
+/* Tunable: NVIDIA temperature target ****************************************/
+static ssize_t nv_temp_target_store(struct device *dev,
+				    struct device_attribute *attr,
+				    const char *buf, size_t count)
+{
+	int result, err;
+	u32 value;
+
+	struct asus_wmi *asus = dev_get_drvdata(dev);
+
+	result = kstrtou32(buf, 10, &value);
+	if (result)
+		return result;
+
+	if (value < NVIDIA_TEMP_MIN || value > NVIDIA_TEMP_MAX)
+		return -EINVAL;
+
+	err = asus_wmi_set_devstate(ASUS_WMI_DEVID_NV_THERM_TARGET, value, &result);
+	if (err) {
+		pr_warn("Failed to set nv_temp_target: %d\n", err);
+		return err;
+	}
+
+	if (result > 1) {
+		pr_warn("Failed to set nv_temp_target (result): 0x%x\n", result);
+		return -EIO;
+	}
+
+	sysfs_notify(&asus->platform_device->dev.kobj, NULL, "nv_temp_target");
+
+	return count;
+}
+static DEVICE_ATTR_WO(nv_temp_target);
+
 /* Battery ********************************************************************/
 
 /* The battery maximum charging percentage */
@@ -3775,6 +4032,13 @@ static struct attribute *platform_attributes[] = {
 	&dev_attr_als_enable.attr,
 	&dev_attr_fan_boost_mode.attr,
 	&dev_attr_throttle_thermal_policy.attr,
+	&dev_attr_ppt_pl2_sppt.attr,
+	&dev_attr_ppt_pl1_spl.attr,
+	&dev_attr_ppt_fppt.attr,
+	&dev_attr_ppt_apu_sppt.attr,
+	&dev_attr_ppt_platform_sppt.attr,
+	&dev_attr_nv_dynamic_boost.attr,
+	&dev_attr_nv_temp_target.attr,
 	&dev_attr_panel_od.attr,
 	&dev_attr_mini_led_mode.attr,
 	NULL
@@ -3812,6 +4076,20 @@ 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_ppt_pl2_sppt.attr)
+		ok = asus->ppt_pl2_sppt_available;
+	else if (attr == &dev_attr_ppt_pl1_spl.attr)
+		ok = asus->ppt_pl1_spl_available;
+	else if (attr == &dev_attr_ppt_fppt.attr)
+		ok = asus->ppt_fppt_available;
+	else if (attr == &dev_attr_ppt_apu_sppt.attr)
+		ok = asus->ppt_apu_sppt_available;
+	else if (attr == &dev_attr_ppt_platform_sppt.attr)
+		ok = asus->ppt_plat_sppt_available;
+	else if (attr == &dev_attr_nv_dynamic_boost.attr)
+		ok = asus->nv_dyn_boost_available;
+	else if (attr == &dev_attr_nv_temp_target.attr)
+		ok = asus->nv_temp_tgt_available;
 	else if (attr == &dev_attr_panel_od.attr)
 		ok = asus->panel_overdrive_available;
 	else if (attr == &dev_attr_mini_led_mode.attr)
@@ -4077,6 +4355,13 @@ static int asus_wmi_add(struct platform_device *pdev)
 	asus->gpu_mux_mode_available = asus_wmi_dev_is_present(asus, ASUS_WMI_DEVID_GPU_MUX);
 	asus->kbd_rgb_mode_available = asus_wmi_dev_is_present(asus, ASUS_WMI_DEVID_TUF_RGB_MODE);
 	asus->kbd_rgb_state_available = asus_wmi_dev_is_present(asus, ASUS_WMI_DEVID_TUF_RGB_STATE);
+	asus->ppt_pl2_sppt_available = asus_wmi_dev_is_present(asus, ASUS_WMI_DEVID_PPT_PL2_SPPT);
+	asus->ppt_pl1_spl_available = asus_wmi_dev_is_present(asus, ASUS_WMI_DEVID_PPT_PL1_SPL);
+	asus->ppt_fppt_available = asus_wmi_dev_is_present(asus, ASUS_WMI_DEVID_PPT_FPPT);
+	asus->ppt_apu_sppt_available = asus_wmi_dev_is_present(asus, ASUS_WMI_DEVID_PPT_APU_SPPT);
+	asus->ppt_plat_sppt_available = asus_wmi_dev_is_present(asus, ASUS_WMI_DEVID_PPT_PLAT_SPPT);
+	asus->nv_dyn_boost_available = asus_wmi_dev_is_present(asus, ASUS_WMI_DEVID_NV_DYN_BOOST);
+	asus->nv_temp_tgt_available = asus_wmi_dev_is_present(asus, ASUS_WMI_DEVID_NV_THERM_TARGET);
 	asus->panel_overdrive_available = asus_wmi_dev_is_present(asus, ASUS_WMI_DEVID_PANEL_OD);
 	asus->mini_led_mode_available = asus_wmi_dev_is_present(asus, ASUS_WMI_DEVID_MINI_LED_MODE);