[PATCH 4/6] asus-wmi: Refactor disable_gpu attribute

From: Luke D. Jones
Date: Fri Aug 12 2022 - 18:25:57 EST


The settings for these attributes can be read from the device, this
is now done instead of reading a stored value from module. The stored
value is also removed.

This means the simpler asus_wmi_dev_is_present() can be used in
*_check_present() - it is not an error for these methods to be
missing.

The _write() functions have their bodies shifted in to *_store()
which simplifies things further.

Signed-off-by: Luke D. Jones <luke@xxxxxxxxxx>
---
drivers/platform/x86/asus-wmi.c | 73 +++++++++++----------------------
1 file changed, 24 insertions(+), 49 deletions(-)

diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
index 0e7fbed8a50d..a72ecc4e33b7 100644
--- a/drivers/platform/x86/asus-wmi.c
+++ b/drivers/platform/x86/asus-wmi.c
@@ -232,7 +232,6 @@ struct asus_wmi {
bool egpu_enable;

bool dgpu_disable_available;
- bool dgpu_disable;

bool throttle_thermal_policy_available;
u8 throttle_thermal_policy_mode;
@@ -562,47 +561,10 @@ static void lid_flip_tablet_mode_get_state(struct asus_wmi *asus)
/* dGPU ********************************************************************/
static int dgpu_disable_check_present(struct asus_wmi *asus)
{
- u32 result;
- int err;
-
asus->dgpu_disable_available = false;

- err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_DGPU, &result);
- if (err) {
- if (err == -ENODEV)
- return 0;
- return err;
- }
-
- if (result & ASUS_WMI_DSTS_PRESENCE_BIT) {
+ if (asus_wmi_dev_is_present(asus, ASUS_WMI_DEVID_DGPU))
asus->dgpu_disable_available = true;
- asus->dgpu_disable = result & ASUS_WMI_DSTS_STATUS_BIT;
- }
-
- return 0;
-}
-
-static int dgpu_disable_write(struct asus_wmi *asus)
-{
- u32 retval;
- u8 value;
- int err;
-
- /* Don't rely on type conversion */
- value = asus->dgpu_disable ? 1 : 0;
-
- err = asus_wmi_set_devstate(ASUS_WMI_DEVID_DGPU, value, &retval);
- if (err) {
- pr_warn("Failed to set dgpu disable: %d\n", err);
- return err;
- }
-
- if (retval > 1) {
- pr_warn("Failed to set dgpu disable (retval): 0x%x\n", retval);
- return -EIO;
- }
-
- sysfs_notify(&asus->platform_device->dev.kobj, NULL, "dgpu_disable");

return 0;
}
@@ -611,9 +573,13 @@ static ssize_t dgpu_disable_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct asus_wmi *asus = dev_get_drvdata(dev);
- u8 mode = asus->dgpu_disable;
+ int result;

- return sysfs_emit(buf, "%d\n", mode);
+ result = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_DGPU);
+ if (result < 0)
+ return result;
+
+ return sysfs_emit(buf, "%d\n", result);
}

/*
@@ -626,24 +592,33 @@ static ssize_t dgpu_disable_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
- bool disable;
- int result;
+ int result, err;
+ u32 disable;

struct asus_wmi *asus = dev_get_drvdata(dev);

- result = kstrtobool(buf, &disable);
+ result = kstrtou32(buf, 10, &disable);
if (result)
return result;

- asus->dgpu_disable = disable;
+ if (disable > 1)
+ return -EINVAL;

- result = dgpu_disable_write(asus);
- if (result)
- return result;
+ err = asus_wmi_set_devstate(ASUS_WMI_DEVID_DGPU, disable, &result);
+ if (err) {
+ pr_warn("Failed to set dgpu disable: %d\n", err);
+ return err;
+ }
+
+ if (result > 1) {
+ pr_warn("Failed to set dgpu disable (result): 0x%x\n", result);
+ return -EIO;
+ }
+
+ sysfs_notify(&asus->platform_device->dev.kobj, NULL, "dgpu_disable");

return count;
}
-
static DEVICE_ATTR_RW(dgpu_disable);

/* eGPU ********************************************************************/
--
2.37.1