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Date: Wed, 16 Feb 2022 10:58:15 +0100
From: Pavel Machek <pavel@....cz>
To: Abhijeet V <abhijeetviswa@...il.com>
Cc: Corentin Chary <corentin.chary@...il.com>,
Hans de Goede <hdegoede@...hat.com>,
Mark Gross <markgross@...nel.org>,
acpi4asus-user@...ts.sourceforge.net,
platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] asus-wmi: Use led multicolor class for keyboard
backlight
Hi!
> Use the led multicolor class for keyboard backlight so that support for
> rgb keyboard leds can be added for supported Asus laptops.
>
> Also refactored the keyboard led functions. The function names are now
> indicative of what the function does.
>
> Signed-off-by: Abhijeet V <abhijeetviswa@...il.com>
Please Cc LED mailing list/maintainers with LED patches.
Best regards,
Pavel
> +++ b/drivers/platform/x86/asus-wmi.c
> @@ -25,6 +25,7 @@
> #include <linux/input/sparse-keymap.h>
> #include <linux/kernel.h>
> #include <linux/leds.h>
> +#include <linux/led-class-multicolor.h>
> #include <linux/module.h>
> #include <linux/pci.h>
> #include <linux/pci_hotplug.h>
> @@ -88,6 +89,8 @@ module_param(fnlock_default, bool, 0444);
> #define ASUS_FAN_BOOST_MODE_SILENT_MASK 0x02
> #define ASUS_FAN_BOOST_MODES_MASK 0x03
>
> +#define ASUS_KBD_SUBLED_COUNT 3
> +
> #define ASUS_THROTTLE_THERMAL_POLICY_DEFAULT 0
> #define ASUS_THROTTLE_THERMAL_POLICY_OVERBOOST 1
> #define ASUS_THROTTLE_THERMAL_POLICY_SILENT 2
> @@ -204,8 +207,6 @@ struct asus_wmi {
> int wlan_led_wk;
> struct led_classdev tpd_led;
> int tpd_led_wk;
> - struct led_classdev kbd_led;
> - int kbd_led_wk;
> struct led_classdev lightbar_led;
> int lightbar_led_wk;
> struct workqueue_struct *led_workqueue;
> @@ -213,6 +214,10 @@ struct asus_wmi {
> struct work_struct wlan_led_work;
> struct work_struct lightbar_led_work;
>
> + struct led_classdev_mc kbd_led_mc;
> + int kbd_led_wk;
> + struct mc_subled subled_info[ASUS_KBD_SUBLED_COUNT];
> +
> struct asus_rfkill wlan;
> struct asus_rfkill bluetooth;
> struct asus_rfkill wimax;
> @@ -870,15 +875,7 @@ static enum led_brightness tpd_led_get(struct led_classdev *led_cdev)
> return read_tpd_led_state(asus);
> }
>
> -static void kbd_led_update(struct asus_wmi *asus)
> -{
> - int ctrl_param = 0;
> -
> - ctrl_param = 0x80 | (asus->kbd_led_wk & 0x7F);
> - asus_wmi_set_devstate(ASUS_WMI_DEVID_KBD_BACKLIGHT, ctrl_param, NULL);
> -}
> -
> -static int kbd_led_read(struct asus_wmi *asus, int *level, int *env)
> +static int kbd_led_brightness_wmi_read(struct asus_wmi *asus, int *level, int *env)
> {
> int retval;
>
> @@ -905,50 +902,77 @@ static int kbd_led_read(struct asus_wmi *asus, int *level, int *env)
> return 0;
> }
>
> -static void do_kbd_led_set(struct led_classdev *led_cdev, int value)
> +static void kbd_led_brightness_wmi_write(struct asus_wmi *asus, int value)
> {
> - struct asus_wmi *asus;
> int max_level;
> + int ctrl_param = 0;
>
> - asus = container_of(led_cdev, struct asus_wmi, kbd_led);
> - max_level = asus->kbd_led.max_brightness;
> -
> + max_level = asus->kbd_led_mc.led_cdev.max_brightness;
> asus->kbd_led_wk = clamp_val(value, 0, max_level);
> - kbd_led_update(asus);
> +
> + ctrl_param = 0x80 | (asus->kbd_led_wk & 0x7F);
> + asus_wmi_set_devstate(ASUS_WMI_DEVID_KBD_BACKLIGHT, ctrl_param, NULL);
> }
>
> -static void kbd_led_set(struct led_classdev *led_cdev,
> - enum led_brightness value)
> +static void kbd_led_brightness_set(struct led_classdev *led_cdev,
> + enum led_brightness value)
> {
> + struct asus_wmi *asus;
> + struct led_classdev_mc *led_cdev_mc;
> +
> /* Prevent disabling keyboard backlight on module unregister */
> if (led_cdev->flags & LED_UNREGISTERING)
> return;
>
> - do_kbd_led_set(led_cdev, value);
> + led_cdev_mc = container_of(led_cdev, struct led_classdev_mc, led_cdev);
> + asus = container_of(led_cdev_mc, struct asus_wmi, kbd_led_mc);
> +
> + kbd_led_brightness_wmi_write(asus, value);
> }
>
> -static void kbd_led_set_by_kbd(struct asus_wmi *asus, enum led_brightness value)
> +static void kbd_led_set_brightness_by_hw(struct asus_wmi *asus,
> + enum led_brightness value)
> {
> - struct led_classdev *led_cdev = &asus->kbd_led;
> + struct led_classdev *led_cdev = &asus->kbd_led_mc.led_cdev;
>
> - do_kbd_led_set(led_cdev, value);
> + kbd_led_brightness_wmi_write(asus, value);
> led_classdev_notify_brightness_hw_changed(led_cdev, asus->kbd_led_wk);
> }
>
> -static enum led_brightness kbd_led_get(struct led_classdev *led_cdev)
> +static enum led_brightness kbd_led_brightness_get(struct led_classdev *led_cdev)
> {
> struct asus_wmi *asus;
> + struct led_classdev_mc *led_cdev_mc;
> int retval, value;
>
> - asus = container_of(led_cdev, struct asus_wmi, kbd_led);
> + led_cdev_mc = container_of(led_cdev, struct led_classdev_mc, led_cdev);
> + asus = container_of(led_cdev_mc, struct asus_wmi, kbd_led_mc);
>
> - retval = kbd_led_read(asus, &value, NULL);
> + retval = kbd_led_brightness_wmi_read(asus, &value, NULL);
> if (retval < 0)
> return retval;
>
> return value;
> }
>
> +int kbd_led_classdev_init(struct asus_wmi *asus, int brightness)
> +{
> + int rv;
> +
> + asus->kbd_led_wk = brightness;
> + asus->kbd_led_mc.led_cdev.name = "asus::kbd_backlight";
> + asus->kbd_led_mc.led_cdev.flags = LED_BRIGHT_HW_CHANGED;
> + asus->kbd_led_mc.led_cdev.brightness_set = kbd_led_brightness_set;
> + asus->kbd_led_mc.led_cdev.brightness_get = kbd_led_brightness_get;
> + asus->kbd_led_mc.led_cdev.max_brightness = 3;
> +
> + asus->kbd_led_mc.num_colors = ASUS_KBD_SUBLED_COUNT;
> +
> + rv = led_classdev_multicolor_register(&asus->platform_device->dev,
> + &asus->kbd_led_mc);
> + return rv;
> +}
> +
> static int wlan_led_unknown_state(struct asus_wmi *asus)
> {
> u32 result;
> @@ -1026,7 +1050,7 @@ static enum led_brightness lightbar_led_get(struct led_classdev *led_cdev)
>
> static void asus_wmi_led_exit(struct asus_wmi *asus)
> {
> - led_classdev_unregister(&asus->kbd_led);
> + led_classdev_multicolor_unregister(&asus->kbd_led_mc);
> led_classdev_unregister(&asus->tpd_led);
> led_classdev_unregister(&asus->wlan_led);
> led_classdev_unregister(&asus->lightbar_led);
> @@ -1057,16 +1081,8 @@ static int asus_wmi_led_init(struct asus_wmi *asus)
> goto error;
> }
>
> - if (!kbd_led_read(asus, &led_val, NULL)) {
> - asus->kbd_led_wk = led_val;
> - asus->kbd_led.name = "asus::kbd_backlight";
> - asus->kbd_led.flags = LED_BRIGHT_HW_CHANGED;
> - asus->kbd_led.brightness_set = kbd_led_set;
> - asus->kbd_led.brightness_get = kbd_led_get;
> - asus->kbd_led.max_brightness = 3;
> -
> - rv = led_classdev_register(&asus->platform_device->dev,
> - &asus->kbd_led);
> + if (!kbd_led_brightness_wmi_read(asus, &led_val, NULL)) {
> + rv = kbd_led_classdev_init(asus, led_val);
> if (rv)
> goto error;
> }
> @@ -3057,18 +3073,19 @@ static void asus_wmi_handle_event_code(int code, struct asus_wmi *asus)
> }
>
> if (code == NOTIFY_KBD_BRTUP) {
> - kbd_led_set_by_kbd(asus, asus->kbd_led_wk + 1);
> + kbd_led_set_brightness_by_hw(asus, asus->kbd_led_wk + 1);
> return;
> }
> if (code == NOTIFY_KBD_BRTDWN) {
> - kbd_led_set_by_kbd(asus, asus->kbd_led_wk - 1);
> + kbd_led_set_brightness_by_hw(asus, asus->kbd_led_wk - 1);
> return;
> }
> if (code == NOTIFY_KBD_BRTTOGGLE) {
> - if (asus->kbd_led_wk == asus->kbd_led.max_brightness)
> - kbd_led_set_by_kbd(asus, 0);
> + if (asus->kbd_led_wk == asus->kbd_led_mc.led_cdev.max_brightness)
> + kbd_led_set_brightness_by_hw(asus, 0);
> else
> - kbd_led_set_by_kbd(asus, asus->kbd_led_wk + 1);
> + kbd_led_set_brightness_by_hw(asus,
> + asus->kbd_led_wk + 1);
> return;
> }
>
> @@ -3720,8 +3737,8 @@ static int asus_hotk_resume(struct device *device)
> {
> struct asus_wmi *asus = dev_get_drvdata(device);
>
> - if (!IS_ERR_OR_NULL(asus->kbd_led.dev))
> - kbd_led_update(asus);
> + if (!IS_ERR_OR_NULL(asus->kbd_led_mc.led_cdev.dev))
> + kbd_led_brightness_wmi_write(asus, asus->kbd_led_wk);
>
> if (asus_wmi_has_fnlock_key(asus))
> asus_wmi_fnlock_update(asus);
> @@ -3762,8 +3779,8 @@ static int asus_hotk_restore(struct device *device)
> bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_UWB);
> rfkill_set_sw_state(asus->uwb.rfkill, bl);
> }
> - if (!IS_ERR_OR_NULL(asus->kbd_led.dev))
> - kbd_led_update(asus);
> + if (!IS_ERR_OR_NULL(asus->kbd_led_mc.led_cdev.dev))
> + kbd_led_brightness_wmi_write(asus, asus->kbd_led_wk);
>
> if (asus_wmi_has_fnlock_key(asus))
> asus_wmi_fnlock_update(asus);
--
http://www.livejournal.com/~pavelmachek
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