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Date: Thu, 4 Aug 2022 15:22:00 +0200
From: Hans de Goede <hdegoede@...hat.com>
To: "Luke D. Jones" <luke@...nes.dev>
Cc: markgross@...nel.org, platform-driver-x86@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/1] asus-wmi: Add support for TUF laptop keyboard
states
Hi Luke,
On 8/4/22 01:13, Luke D. Jones wrote:
> Adds support for the TUF series laptop power states. This means
> control of if the LED's are on while awake, or an animation is
> shown while booting or suspended.
>
> /sys/devices/platform/asus-nb-wmi/tuf_krgb_state_index provides
> labels for the index fields as "save boot awake sleep keyboard"
>
> /sys/devices/platform/asus-nb-wmi/tuf_krgb_state has the following
> as input options via boolean "b b b b b":
> - Save or set, if set, then settings revert on cold boot
> - Boot, if true, the keyboard displays animation on boot
> - Awake, if true, the keyboard LED's are on while device is awake
> - Sleep, if true, the keyboard shows animation while device is suspended
> - Keybaord, appears to have no effect
Keybaord typo / spelling issue.
Please make this an extra attribute for the led_class_device,
you can do this by adding this attribute to a separate
attribute_group, lets say e.g. "tuf_rgb_attributes" and then
in the "[PATCH] asus-wmi: Add support for TUF laptop keyboard RGB"
code add:
mc_cdev->led_cdev.groups = tuf_rgb_attributes;
and then the "tuf_krgb_state" file should show up as:
/sys/class/leds/asus::multicolour/tuf_krgb_state
Also I'm not sure what to think of the tuf_krgb_state_index file,
having a sysfs file just to show some help text feels weird / wrong.
Please instead document the expected format in the existing:
Documentation/ABI/testing/sysfs-platform-asus-wmi
file; and talking about that file, it seems that this file
could use some love to document other recently addes asus-wmi
features too.
Related to the tuf_krgb_state_index file, please use the
new sysfs_emit helper for all new show functions. And bonus
points for a patch (series?) converting old show functions
over to it.
Regards,
Hans
> Signed-off-by: Luke D. Jones <luke@...nes.dev>
> ---
> drivers/platform/x86/asus-wmi.c | 95 ++++++++++++++++++++++
> include/linux/platform_data/x86/asus-wmi.h | 3 +
> 2 files changed, 98 insertions(+)
>
> diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
> index 0e7fbed8a50d..bbfb054ff3b2 100644
> --- a/drivers/platform/x86/asus-wmi.c
> +++ b/drivers/platform/x86/asus-wmi.c
> @@ -234,6 +234,8 @@ struct asus_wmi {
> bool dgpu_disable_available;
> bool dgpu_disable;
>
> + bool tuf_krgb_state_available;
> +
> bool throttle_thermal_policy_available;
> u8 throttle_thermal_policy_mode;
>
> @@ -734,6 +736,86 @@ static ssize_t egpu_enable_store(struct device *dev,
>
> static DEVICE_ATTR_RW(egpu_enable);
>
> +/* TUF Laptop Keyboard RGB States *********************************************/
> +static int tuf_krgb_state_check_present(struct asus_wmi *asus)
> +{
> + u32 result;
> + int err;
> +
> + asus->tuf_krgb_state_available = false;
> +
> + err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_TUF_RGB_STATE, &result);
> + if (err) {
> + if (err == -ENODEV)
> + return 0;
> + return err;
> + }
> +
> + if (result & ASUS_WMI_DSTS_PRESENCE_BIT)
> + asus->tuf_krgb_state_available = true;
> +
> + return 0;
> +}
> +
> +static ssize_t tuf_krgb_state_store(struct device *dev,
> + struct device_attribute *attr,
> + const char *buf, size_t count)
> +{
> + int err;
> + u32 ret;
> + bool tmp;
> + char *data, *part, *end;
> + u8 save, flags, res, arg_num;
> +
> + save = flags = arg_num = 0;
> + data = end = kstrdup(buf, GFP_KERNEL);
> +
> + while ((part = strsep(&end, " ")) != NULL) {
> + if (part == NULL)
> + return -1;
> +
> + res = kstrtobool(part, &tmp);
> + if (res)
> + return -1;
> +
> + if (tmp) {
> + if (arg_num == 0) // save : set
> + save = tmp == 0 ? 0x0100 : 0x0000;
> + else if (arg_num == 1)
> + flags |= 0x02; // boot
> + else if (arg_num == 2)
> + flags |= 0x08; // awake
> + else if (arg_num == 3)
> + flags |= 0x20; // sleep
> + else if (arg_num == 4)
> + flags |= 0x80; // keyboard
> + }
> +
> + arg_num += 1;
> + }
> +
> + err = asus_wmi_evaluate_method3(ASUS_WMI_METHODID_DEVS,
> + ASUS_WMI_DEVID_TUF_RGB_STATE, 0xBD | save | (flags << 16), 0, &ret);
> + if (err) {
> + return err;
> + }
> +
> + kfree(data);
> + return count;
> +}
> +
> +static DEVICE_ATTR_WO(tuf_krgb_state);
> +
> +static ssize_t tuf_krgb_state_index_show(struct device *device,
> + struct device_attribute *attr,
> + char *buf)
> +{
> + int len = sprintf(buf, "%s", "save boot awake sleep keyboard\n");
> + return len;
> +}
> +
> +static DEVICE_ATTR_RO(tuf_krgb_state_index);
> +
> /* Battery ********************************************************************/
>
> /* The battery maximum charging percentage */
> @@ -3258,6 +3340,8 @@ static struct attribute *platform_attributes[] = {
> &dev_attr_touchpad.attr,
> &dev_attr_egpu_enable.attr,
> &dev_attr_dgpu_disable.attr,
> + &dev_attr_tuf_krgb_state.attr,
> + &dev_attr_tuf_krgb_state_index.attr,
> &dev_attr_lid_resume.attr,
> &dev_attr_als_enable.attr,
> &dev_attr_fan_boost_mode.attr,
> @@ -3286,6 +3370,12 @@ static umode_t asus_sysfs_is_visible(struct kobject *kobj,
> devid = ASUS_WMI_DEVID_ALS_ENABLE;
> else if (attr == &dev_attr_egpu_enable.attr)
> ok = asus->egpu_enable_available;
> + else if (attr == &dev_attr_tuf_krgb_state.attr)
> + ok = asus->tuf_krgb_state_available;
> + else if (attr == &dev_attr_tuf_krgb_state_index.attr)
> + ok = asus->tuf_krgb_state_available;
> + else if (attr == &dev_attr_dgpu_disable.attr)
> + ok = asus->dgpu_disable_available;
> else if (attr == &dev_attr_dgpu_disable.attr)
> ok = asus->dgpu_disable_available;
> else if (attr == &dev_attr_fan_boost_mode.attr)
> @@ -3557,6 +3647,10 @@ static int asus_wmi_add(struct platform_device *pdev)
> if (err)
> goto fail_dgpu_disable;
>
> + err = tuf_krgb_state_check_present(asus);
> + if (err)
> + goto fail_tuf_krgb_state;
> +
> err = fan_boost_mode_check_present(asus);
> if (err)
> goto fail_fan_boost_mode;
> @@ -3671,6 +3765,7 @@ static int asus_wmi_add(struct platform_device *pdev)
> fail_fan_boost_mode:
> fail_egpu_enable:
> fail_dgpu_disable:
> +fail_tuf_krgb_state:
> fail_platform:
> fail_panel_od:
> kfree(asus);
> diff --git a/include/linux/platform_data/x86/asus-wmi.h b/include/linux/platform_data/x86/asus-wmi.h
> index a571b47ff362..a95b37385e66 100644
> --- a/include/linux/platform_data/x86/asus-wmi.h
> +++ b/include/linux/platform_data/x86/asus-wmi.h
> @@ -98,6 +98,9 @@
> /* dgpu on/off */
> #define ASUS_WMI_DEVID_DGPU 0x00090020
>
> +/* TUF laptop RGB power/state */
> +#define ASUS_WMI_DEVID_TUF_RGB_STATE 0x00100057
> +
> /* DSTS masks */
> #define ASUS_WMI_DSTS_STATUS_BIT 0x00000001
> #define ASUS_WMI_DSTS_UNKNOWN_BIT 0x00000002
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