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Date: Sat, 17 Jul 2021 20:19:54 +1200
From: Luke Jones <luke@...nes.dev>
To: hdegoede@...hat.com
Cc: pobrn@...tonmail.com, mgross@...ux.intel.com,
corentin.chary@...il.com, platform-driver-x86@...r.kernel.org,
linux-kernel@...r.kernel.org, acpi4asus-user@...ts.sourceforge.net
Subject: Re: [PATCH 3/4] asus-wmi: Add egpu enable method
Damn. I thought `-v2` on `git send-email` would bump patch version too.
What is the correct way to do that for a full patch sequence?
On Sat, Jul 17 2021 at 20:15:30 +1200, Luke Jones <luke@...nes.dev>
wrote:
> Apologies, I forgot that the patches contain sequence. There is
> actually no 4th patch (the patch itself was already upstreamed).
>
> Sincere regards,
> Luke.
>
> On Sat, Jul 17 2021 at 20:13:23 +1200, Luke D. Jones
> <luke@...nes.dev> wrote:
>> The X13 Flow laptops can utilise an external GPU. This requires
>> toggling an ACPI method which will first disable the internal
>> dGPU, and then enable the eGPU.
>>
>> Signed-off-by: Luke D. Jones <luke@...nes.dev>
>> ---
>> drivers/platform/x86/asus-wmi.c | 91
>> ++++++++++++++++++++++
>> include/linux/platform_data/x86/asus-wmi.h | 3 +
>> 2 files changed, 94 insertions(+)
>>
>> diff --git a/drivers/platform/x86/asus-wmi.c
>> b/drivers/platform/x86/asus-wmi.c
>> index 02762a60d27a..ee5d8656641e 100644
>> --- a/drivers/platform/x86/asus-wmi.c
>> +++ b/drivers/platform/x86/asus-wmi.c
>> @@ -210,6 +210,9 @@ struct asus_wmi {
>> u8 fan_boost_mode_mask;
>> u8 fan_boost_mode;
>>
>> + bool egpu_enable_available; // 0 = enable
>> + bool egpu_enable;
>> +
>> bool dgpu_disable_available;
>> bool dgpu_disable;
>>
>> @@ -430,6 +433,86 @@ static void
>> lid_flip_tablet_mode_get_state(struct asus_wmi *asus)
>> }
>> }
>>
>> +/* eGPU
>> ********************************************************************/
>> +static int egpu_enable_check_present(struct asus_wmi *asus)
>> +{
>> + u32 result;
>> + int err;
>> +
>> + asus->egpu_enable_available = false;
>> +
>> + err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_EGPU, &result);
>> + if (err) {
>> + if (err == -ENODEV)
>> + return 0;
>> + return err;
>> + }
>> +
>> + if (result & ASUS_WMI_DSTS_PRESENCE_BIT) {
>> + asus->egpu_enable_available = true;
>> + asus->egpu_enable = result & ASUS_WMI_DSTS_STATUS_BIT;
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +static int egpu_enable_write(struct asus_wmi *asus)
>> +{
>> + int err;
>> + u8 value;
>> + u32 retval;
>> +
>> + value = asus->egpu_enable;
>> +
>> + err = asus_wmi_set_devstate(ASUS_WMI_DEVID_EGPU, value, &retval);
>> +
>> + if (err) {
>> + pr_warn("Failed to set egpu disable: %d\n", err);
>> + return err;
>> + }
>> +
>> + if (retval > 1 || retval < 0) {
>> + pr_warn("Failed to set egpu disable (retval): 0x%x\n", retval);
>> + return -EIO;
>> + }
>> +
>> + sysfs_notify(&asus->platform_device->dev.kobj, NULL,
>> "egpu_enable");
>> +
>> + return 0;
>> +}
>> +
>> +static ssize_t egpu_enable_show(struct device *dev,
>> + struct device_attribute *attr, char *buf)
>> +{
>> + struct asus_wmi *asus = dev_get_drvdata(dev);
>> + bool mode = asus->egpu_enable;
>> +
>> + return sysfs_emit(buf, "%d\n", mode);
>> +}
>> +
>> +static ssize_t egpu_enable_store(struct device *dev,
>> + struct device_attribute *attr,
>> + const char *buf, size_t count)
>> +{
>> + int result;
>> + bool disable;
>> + struct asus_wmi *asus = dev_get_drvdata(dev);
>> +
>> + result = kstrtobool(buf, &disable);
>> + if (result == -EINVAL)
>> + return result;
>> +
>> + asus->egpu_enable = disable;
>> +
>> + result = egpu_enable_write(asus);
>> + if (result != 0)
>> + return result;
>> +
>> + return count;
>> +}
>> +
>> +static DEVICE_ATTR_RW(egpu_enable);
>> +
>> /* dGPU
>> ********************************************************************/
>> static int dgpu_disable_check_present(struct asus_wmi *asus)
>> {
>> @@ -2502,6 +2585,7 @@ static struct attribute *platform_attributes[]
>> = {
>> &dev_attr_camera.attr,
>> &dev_attr_cardr.attr,
>> &dev_attr_touchpad.attr,
>> + &dev_attr_egpu_enable.attr,
>> &dev_attr_dgpu_disable.attr,
>> &dev_attr_lid_resume.attr,
>> &dev_attr_als_enable.attr,
>> @@ -2529,6 +2613,8 @@ static umode_t asus_sysfs_is_visible(struct
>> kobject *kobj,
>> devid = ASUS_WMI_DEVID_LID_RESUME;
>> else if (attr == &dev_attr_als_enable.attr)
>> devid = ASUS_WMI_DEVID_ALS_ENABLE;
>> + else if (attr == &dev_attr_egpu_enable.attr)
>> + ok = asus->egpu_enable_available;
>> else if (attr == &dev_attr_dgpu_disable.attr)
>> ok = asus->dgpu_disable_available;
>> else if (attr == &dev_attr_fan_boost_mode.attr)
>> @@ -2792,6 +2878,10 @@ static int asus_wmi_add(struct
>> platform_device *pdev)
>> if (err)
>> goto fail_platform;
>>
>> + err = egpu_enable_check_present(asus);
>> + if (err)
>> + goto fail_egpu_enable;
>> +
>> err = dgpu_disable_check_present(asus);
>> if (err)
>> goto fail_dgpu_disable;
>> @@ -2896,6 +2986,7 @@ static int asus_wmi_add(struct platform_device
>> *pdev)
>> fail_sysfs:
>> fail_throttle_thermal_policy:
>> fail_fan_boost_mode:
>> +fail_egpu_enable:
>> fail_dgpu_disable:
>> fail_platform:
>> fail_panel_od:
>> diff --git a/include/linux/platform_data/x86/asus-wmi.h
>> b/include/linux/platform_data/x86/asus-wmi.h
>> index a528f9d0e4b7..17dc5cb6f3f2 100644
>> --- a/include/linux/platform_data/x86/asus-wmi.h
>> +++ b/include/linux/platform_data/x86/asus-wmi.h
>> @@ -90,6 +90,9 @@
>> /* Keyboard dock */
>> #define ASUS_WMI_DEVID_KBD_DOCK 0x00120063
>>
>> +/* dgpu on/off */
>> +#define ASUS_WMI_DEVID_EGPU 0x00090019
>> +
>> /* dgpu on/off */
>> #define ASUS_WMI_DEVID_DGPU 0x00090020
>>
>> --
>> 2.31.1
>>
>
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