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authorLuke D. Jones <luke@ljones.dev>2022-08-13 12:26:24 +0300
committerHans de Goede <hdegoede@redhat.com>2022-08-25 17:23:53 +0300
commit01ef026ab36357a818c7d8324a36dbb8beff6ff5 (patch)
tree4c1a7aa278f33f62b72455ae918779aa57f9a8b1 /drivers/platform/x86/asus-wmi.c
parent3c3b55564afa8b7d952ce2ba90e7f522832ed0f7 (diff)
downloadlinux-01ef026ab36357a818c7d8324a36dbb8beff6ff5.tar.xz
platform/x86: asus-wmi: Support the hardware GPU MUX on some laptops
Support the hardware GPU MUX switch available on some models. This switch can toggle the MUX between: - 0, Dedicated mode - 1, Optimus mode Optimus mode is the regular iGPU + dGPU available, while dedicated mode switches the system to have only the dGPU available. Signed-off-by: Luke D. Jones <luke@ljones.dev> Link: https://lore.kernel.org/r/20220813092624.6228-1-luke@ljones.dev Reviewed-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Diffstat (limited to 'drivers/platform/x86/asus-wmi.c')
-rw-r--r--drivers/platform/x86/asus-wmi.c51
1 files changed, 51 insertions, 0 deletions
diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
index d72491fb218b..46d0dd96a351 100644
--- a/drivers/platform/x86/asus-wmi.c
+++ b/drivers/platform/x86/asus-wmi.c
@@ -231,6 +231,7 @@ struct asus_wmi {
bool egpu_enable_available;
bool dgpu_disable_available;
+ bool gpu_mux_mode_available;
bool throttle_thermal_policy_available;
u8 throttle_thermal_policy_mode;
@@ -657,6 +658,52 @@ static ssize_t egpu_enable_store(struct device *dev,
}
static DEVICE_ATTR_RW(egpu_enable);
+/* gpu mux switch *************************************************************/
+static ssize_t gpu_mux_mode_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct asus_wmi *asus = dev_get_drvdata(dev);
+ int result;
+
+ result = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_GPU_MUX);
+ if (result < 0)
+ return result;
+
+ return sysfs_emit(buf, "%d\n", result);
+}
+
+static ssize_t gpu_mux_mode_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct asus_wmi *asus = dev_get_drvdata(dev);
+ int result, err;
+ u32 optimus;
+
+ err = kstrtou32(buf, 10, &optimus);
+ if (err)
+ return err;
+
+ if (optimus > 1)
+ return -EINVAL;
+
+ err = asus_wmi_set_devstate(ASUS_WMI_DEVID_GPU_MUX, optimus, &result);
+ if (err) {
+ dev_err(dev, "Failed to set GPU MUX mode: %d\n", err);
+ return err;
+ }
+ /* !1 is considered a fail by ASUS */
+ if (result != 1) {
+ dev_warn(dev, "Failed to set GPU MUX mode (result): 0x%x\n", result);
+ return -EIO;
+ }
+
+ sysfs_notify(&asus->platform_device->dev.kobj, NULL, "gpu_mux_mode");
+
+ return count;
+}
+static DEVICE_ATTR_RW(gpu_mux_mode);
+
/* Battery ********************************************************************/
/* The battery maximum charging percentage */
@@ -3172,6 +3219,7 @@ static struct attribute *platform_attributes[] = {
&dev_attr_touchpad.attr,
&dev_attr_egpu_enable.attr,
&dev_attr_dgpu_disable.attr,
+ &dev_attr_gpu_mux_mode.attr,
&dev_attr_lid_resume.attr,
&dev_attr_als_enable.attr,
&dev_attr_fan_boost_mode.attr,
@@ -3202,6 +3250,8 @@ static umode_t asus_sysfs_is_visible(struct kobject *kobj,
ok = asus->egpu_enable_available;
else if (attr == &dev_attr_dgpu_disable.attr)
ok = asus->dgpu_disable_available;
+ else if (attr == &dev_attr_gpu_mux_mode.attr)
+ ok = asus->gpu_mux_mode_available;
else if (attr == &dev_attr_fan_boost_mode.attr)
ok = asus->fan_boost_mode_available;
else if (attr == &dev_attr_throttle_thermal_policy.attr)
@@ -3465,6 +3515,7 @@ static int asus_wmi_add(struct platform_device *pdev)
asus->egpu_enable_available = asus_wmi_dev_is_present(asus, ASUS_WMI_DEVID_EGPU);
asus->dgpu_disable_available = asus_wmi_dev_is_present(asus, ASUS_WMI_DEVID_DGPU);
+ asus->gpu_mux_mode_available = asus_wmi_dev_is_present(asus, ASUS_WMI_DEVID_GPU_MUX);
asus->panel_overdrive_available = asus_wmi_dev_is_present(asus, ASUS_WMI_DEVID_PANEL_OD);
err = fan_boost_mode_check_present(asus);