Message-Id: <UQVBGR.1W6SHRT392MR@ljones.dev>
Date:   Tue, 09 Aug 2022 15:16:05 +1200
From:   Luke Jones <luke@...nes.dev>
To:     hdegoede@...hat.com
Cc:     andy.shevchenko@...il.com, pobrn@...tonmail.com, pavel@....cz,
        platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 2/6] asus-wmi: Implement TUF laptop keyboard LED modes

*sighs*

I swear I ran checkpatch. I just doublechecked and ran again, getting 
this:

----------------------------------------------------------------
./v3-0002-asus-wmi-Implement-TUF-laptop-keyboard-LED-modes.patch
----------------------------------------------------------------
WARNING: Prefer kstrto<type> to single variable sscanf
#108: FILE: drivers/platform/x86/asus-wmi.c:783:
+ if (sscanf(buf, "%hhd", &save) != 1)
+ return -EINVAL;

WARNING: Prefer kstrto<type> to single variable sscanf
#129: FILE: drivers/platform/x86/asus-wmi.c:804:
+ if (sscanf(buf, "%hhd", &mode) != 1)
+ return -EINVAL;

WARNING: suspect code indent for conditional statements (8, 10)
#133: FILE: drivers/platform/x86/asus-wmi.c:808:
+ if (mode >= 12 || mode == 10)
+ asus->keyboard_rgb_led.mode = 10;

WARNING: suspect code indent for conditional statements (8, 10)
#135: FILE: drivers/platform/x86/asus-wmi.c:810:
+ else
+ asus->keyboard_rgb_led.mode = mode;

WARNING: Prefer kstrto<type> to single variable sscanf
#151: FILE: drivers/platform/x86/asus-wmi.c:826:
+ if (sscanf(buf, "%hhd", &speed) != 1)
+ return -EINVAL;

I will fix, and wait for review of V3 before submitting hopefully the 
final version.

Sorry everyone.


On Tue, Aug 9 2022 at 14:50:50 +1200, Luke D. Jones <luke@...nes.dev> 
wrote:
> Adds support for changing the laptop keyboard LED modes. These
> are visible effects such as static, rainbow, pulsing, colour cycles.
> 
> These sysfs attributes are added to asus-nb-wmi:
> - keyboard_rgb_save
> - keyboard_rgb_mode
> - keyboard_rgb_speed
> 
> Signed-off-by: Luke D. Jones <luke@...nes.dev>
> ---
>  .../ABI/testing/sysfs-platform-asus-wmi       |  30 +++++
>  drivers/platform/x86/asus-wmi.c               | 127 
> ++++++++++++++++--
>  2 files changed, 149 insertions(+), 8 deletions(-)
> 
> diff --git a/Documentation/ABI/testing/sysfs-platform-asus-wmi 
> b/Documentation/ABI/testing/sysfs-platform-asus-wmi
> index 04885738cf15..a9128fa5cc65 100644
> --- a/Documentation/ABI/testing/sysfs-platform-asus-wmi
> +++ b/Documentation/ABI/testing/sysfs-platform-asus-wmi
> @@ -57,3 +57,33 @@ Description:
>  			* 0 - default,
>  			* 1 - overboost,
>  			* 2 - silent
> +
> +What:		/sys/devices/platform/<platform>/keyboard_rgb_save
> +Date:		Aug 2022
> +KernelVersion:	6.1
> +Contact:	"Luke Jones" <luke@...nes.dev>
> +Description:
> +		Set or save the RGB mode details (write-only):
> +			* 0 - set, the settings will be lost on boot
> +			* 1 - save, the settings will be retained on boot
> +
> +What:		/sys/devices/platform/<platform>/keyboard_rgb_mode
> +Date:		Aug 2022
> +KernelVersion:	6.1
> +Contact:	"Luke Jones" <luke@...nes.dev>
> +Description:
> +		Set the mode of the RGB keyboard, the mode will not apply until the
> +		keyboard_rgb_save attribute is set (write-only):
> +			* 0 to 12, each is an RGB such as static, rainbow, pulse.
> +				Not all keyboards accept every mode.
> +
> +What:		/sys/devices/platform/<platform>/keyboard_rgb_speed
> +Date:		Aug 2022
> +KernelVersion:	6.1
> +Contact:	"Luke Jones" <luke@...nes.dev>
> +Description:
> +		Set the speed of the selected RGB effect, the speed will not apply
> +		until the keyboard_rgb_save attribute is set (write-only):
> +			* 0 - slow
> +			* 1 - medium
> +			* 2 - fast
> \ No newline at end of file
> diff --git a/drivers/platform/x86/asus-wmi.c 
> b/drivers/platform/x86/asus-wmi.c
> index 233e73f4313d..fa0cc2895a66 100644
> --- a/drivers/platform/x86/asus-wmi.c
> +++ b/drivers/platform/x86/asus-wmi.c
> @@ -246,7 +246,8 @@ struct asus_wmi {
>  	bool dgpu_disable_available;
>  	bool dgpu_disable;
> 
> -	struct keyboard_rgb_led keyboard_rgb_mode;
> +	bool keyboard_rgb_mode_available;
> +	struct keyboard_rgb_led keyboard_rgb_led;
> 
>  	bool throttle_thermal_policy_available;
>  	u8 throttle_thermal_policy_mode;
> @@ -748,6 +749,102 @@ static ssize_t egpu_enable_store(struct device 
> *dev,
> 
>  static DEVICE_ATTR_RW(egpu_enable);
> 
> +/* TUF Laptop Keyboard RGB Modes 
> **********************************************/
> +static int keyboard_rgb_check_present(struct asus_wmi *asus)
> +{
> +	u32 result;
> +	int err;
> +
> +	asus->keyboard_rgb_mode_available = false;
> +
> +	err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_TUF_RGB_MODE, 
> &result);
> +	if (err) {
> +		if (err == -ENODEV)
> +			return 0;
> +		return err;
> +	}
> +
> +	if (result & ASUS_WMI_DSTS_PRESENCE_BIT)
> +		asus->keyboard_rgb_mode_available = true;
> +
> +	return 0;
> +}
> +
> +static ssize_t keyboard_rgb_save_store(struct device *device,
> +				 struct device_attribute *attr,
> +				 const char *buf, size_t count)
> +{
> +	u8 save;
> +	int err;
> +
> +	struct asus_wmi *asus = dev_get_drvdata(device);
> +	struct led_classdev *cdev = &asus->keyboard_rgb_led.dev.led_cdev;
> +
> +	if (sscanf(buf, "%hhd", &save) != 1)
> +		return -EINVAL;
> +
> +	asus->keyboard_rgb_led.save = !!save;
> +
> +	err = tuf_rgb_brightness_set(cdev, cdev->brightness);
> +	if (err)
> +		return err;
> +
> +	return count;
> +}
> +static DEVICE_ATTR_WO(keyboard_rgb_save);
> +
> +static ssize_t keyboard_rgb_mode_store(struct device *device,
> +				 struct device_attribute *attr,
> +				 const char *buf, size_t count)
> +{
> +	u8 mode;
> +
> +	struct asus_wmi *asus = dev_get_drvdata(device);
> +
> +	if (sscanf(buf, "%hhd", &mode) != 1)
> +		return -EINVAL;
> +
> +	/* These are the known usable modes across all TUF/ROG */
> +	if (mode >= 12 || mode == 10)
> +	  asus->keyboard_rgb_led.mode = 10;
> +	else
> +	  asus->keyboard_rgb_led.mode = mode;
> +
> +	return count;
> +}
> +static DEVICE_ATTR_WO(keyboard_rgb_mode);
> +
> +
> +static ssize_t keyboard_rgb_speed_store(struct device *device,
> +				 struct device_attribute *attr,
> +				 const char *buf, size_t count)
> +{
> +	u8 speed;
> +
> +	struct asus_wmi *asus = dev_get_drvdata(device);
> +
> +	if (sscanf(buf, "%hhd", &speed) != 1)
> +		return -EINVAL;
> +
> +	switch (speed) {
> +	case 0:
> +		asus->keyboard_rgb_led.speed = 0xe1;
> +		break;
> +	case 1:
> +		asus->keyboard_rgb_led.speed = 0xeb;
> +		break;
> +	case 2:
> +		asus->keyboard_rgb_led.speed = 0xf5;
> +		break;
> +	default:
> +		asus->keyboard_rgb_led.speed = 0xeb;
> +		break;
> +	}
> +
> +	return count;
> +}
> +static DEVICE_ATTR_WO(keyboard_rgb_speed);
> +
>  /* Battery 
> ********************************************************************/
> 
>  /* The battery maximum charging percentage */
> @@ -1047,7 +1144,7 @@ static int tuf_rgb_brightness_set(struct 
> led_classdev *cdev,
>  {
>  	struct led_classdev_mc *mc_cdev = lcdev_to_mccdev(cdev);
>  	struct keyboard_rgb_led *rgb = container_of(mc_cdev, struct 
> keyboard_rgb_led, dev);
> -	struct asus_wmi *asus = container_of(rgb, struct asus_wmi, 
> keyboard_rgb_mode);
> +	struct asus_wmi *asus = container_of(rgb, struct asus_wmi, 
> keyboard_rgb_led);
>  	struct device *dev = &asus->platform_device->dev;
>  	u8 r, g, b;
>  	int err;
> @@ -1075,7 +1172,7 @@ static void asus_wmi_led_exit(struct asus_wmi 
> *asus)
>  	led_classdev_unregister(&asus->tpd_led);
>  	led_classdev_unregister(&asus->wlan_led);
>  	led_classdev_unregister(&asus->lightbar_led);
> -	led_classdev_multicolor_unregister(&asus->keyboard_rgb_mode.dev);
> +	led_classdev_multicolor_unregister(&asus->keyboard_rgb_led.dev);
> 
>  	if (asus->led_workqueue)
>  		destroy_workqueue(asus->led_workqueue);
> @@ -1148,8 +1245,8 @@ static int asus_wmi_led_init(struct asus_wmi 
> *asus)
>  	}
> 
>  	if (asus_wmi_dev_is_present(asus, ASUS_WMI_DEVID_TUF_RGB_MODE)) {
> -		struct mc_subled *mc_led_info = 
> asus->keyboard_rgb_mode.subled_info;
> -		struct led_classdev_mc *mc_cdev = &asus->keyboard_rgb_mode.dev;
> +		struct mc_subled *mc_led_info = asus->keyboard_rgb_led.subled_info;
> +		struct led_classdev_mc *mc_cdev = &asus->keyboard_rgb_led.dev;
>  		struct device *dev = &asus->platform_device->dev;
>  		u8 led_brightness = 255;
> 
> @@ -1174,9 +1271,9 @@ static int asus_wmi_led_init(struct asus_wmi 
> *asus)
>  		 * It's not possible to get last set data from device so set 
> defaults
>  		 * to make it safe for a user to change either RGB or modes.
>  		 */
> -		asus->keyboard_rgb_mode.save = 1;
> -		asus->keyboard_rgb_mode.mode = 0;
> -		asus->keyboard_rgb_mode.speed = 0xeb;
> +		asus->keyboard_rgb_led.save = 1;
> +		asus->keyboard_rgb_led.mode = 0;
> +		asus->keyboard_rgb_led.speed = 0xeb;
> 
>  		mc_cdev->led_cdev.brightness = led_brightness;
>  		mc_cdev->led_cdev.max_brightness = led_brightness;
> @@ -3338,6 +3435,9 @@ static struct attribute *platform_attributes[] 
> = {
>  	&dev_attr_touchpad.attr,
>  	&dev_attr_egpu_enable.attr,
>  	&dev_attr_dgpu_disable.attr,
> +	&dev_attr_keyboard_rgb_save.attr,
> +	&dev_attr_keyboard_rgb_mode.attr,
> +	&dev_attr_keyboard_rgb_speed.attr,
>  	&dev_attr_lid_resume.attr,
>  	&dev_attr_als_enable.attr,
>  	&dev_attr_fan_boost_mode.attr,
> @@ -3368,6 +3468,12 @@ 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_keyboard_rgb_save.attr)
> +		ok = asus->keyboard_rgb_mode_available;
> +	else if (attr == &dev_attr_keyboard_rgb_mode.attr)
> +		ok = asus->keyboard_rgb_mode_available;
> +	else if (attr == &dev_attr_keyboard_rgb_speed.attr)
> +		ok = asus->keyboard_rgb_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)
> @@ -3637,6 +3743,10 @@ static int asus_wmi_add(struct platform_device 
> *pdev)
>  	if (err)
>  		goto fail_dgpu_disable;
> 
> +	err = keyboard_rgb_check_present(asus);
> +	if (err)
> +		goto fail_keyboard_rgb_mode;
> +
>  	err = fan_boost_mode_check_present(asus);
>  	if (err)
>  		goto fail_fan_boost_mode;
> @@ -3751,6 +3861,7 @@ static int asus_wmi_add(struct platform_device 
> *pdev)
>  fail_fan_boost_mode:
>  fail_egpu_enable:
>  fail_dgpu_disable:
> +fail_keyboard_rgb_mode:
>  fail_platform:
>  fail_panel_od:
>  	kfree(asus);
> --
> 2.37.1
> 

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