linux-kernel - Re: [PATCH v1 2/2] hid-asus: change the report

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Message-Id: <ea9262bc-3b5a-4f7a-be99-871361a544e3@app.fastmail.com>
Date: Wed, 29 May 2024 13:30:25 +1200
From: "Luke Jones" <luke@...nes.dev>
To: "Jiri Kosina" <jikos@...nel.org>
Cc: "Hans de Goede" <hdegoede@...hat.com>,
 Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
 corentin.chary@...il.com, platform-driver-x86@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-input@...r.kernel.org, bentiss@...nel.org
Subject: Re: [PATCH v1 2/2] hid-asus: change the report_id used for HID LED control

Sorry about the doubleup. Wifi is spotty and it looked like the initial send didn't work.

See https://lore.kernel.org/linux-input/20240529012827.146005-1-luke@ljones.dev/T/#t for cover-letter

On Wed, 29 May 2024, at 1:24 PM, Luke D. Jones wrote:
> On some laptops the report_id used for LED brightness control must be
> 0x5D instead of 0x5A.
> 
> Signed-off-by: Luke D. Jones <luke@...nes.dev>
> ---
> drivers/hid/hid-asus.c | 26 +++++++++++++++++++++++++-
> 1 file changed, 25 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/hid/hid-asus.c b/drivers/hid/hid-asus.c
> index 4cba8e143031..ec3556cc4eef 100644
> --- a/drivers/hid/hid-asus.c
> +++ b/drivers/hid/hid-asus.c
> @@ -94,6 +94,8 @@ MODULE_DESCRIPTION("Asus HID Keyboard and TouchPad");
>  
> #define TRKID_SGN       ((TRKID_MAX + 1) >> 1)
>  
> +static const char * const use_alt_led_report_id[] = { "GU605", "GA403" };
> +
> struct asus_kbd_leds {
> struct led_classdev cdev;
> struct hid_device *hdev;
> @@ -101,6 +103,7 @@ struct asus_kbd_leds {
> unsigned int brightness;
> spinlock_t lock;
> bool removed;
> + int report_id;
> };
>  
> struct asus_touchpad_info {
> @@ -473,7 +476,7 @@ static enum led_brightness asus_kbd_backlight_get(struct led_classdev *led_cdev)
> static void asus_kbd_backlight_work(struct work_struct *work)
> {
> struct asus_kbd_leds *led = container_of(work, struct asus_kbd_leds, work);
> - u8 buf[] = { FEATURE_KBD_REPORT_ID, 0xba, 0xc5, 0xc4, 0x00 };
> + u8 buf[] = { led->report_id, 0xba, 0xc5, 0xc4, 0x00 };
> int ret;
> unsigned long flags;
>  
> @@ -513,6 +516,23 @@ static bool asus_kbd_wmi_led_control_present(struct hid_device *hdev)
> return !!(value & ASUS_WMI_DSTS_PRESENCE_BIT);
> }
>  
> +static bool asus_kbd_is_input_led(void)
> +{
> + const char *product;
> + int i;
> +
> + product = dmi_get_system_info(DMI_PRODUCT_NAME);
> + if (!product)
> + return false;
> +
> + for (i = 0; i < ARRAY_SIZE(use_alt_led_report_id); i++) {
> + if (strstr(product, use_alt_led_report_id[i]))
> + return true;
> + }
> +
> + return false;
> +}
> +
> static int asus_kbd_register_leds(struct hid_device *hdev)
> {
> struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
> @@ -555,6 +575,10 @@ static int asus_kbd_register_leds(struct hid_device *hdev)
> if (!drvdata->kbd_backlight)
> return -ENOMEM;
>  
> + drvdata->kbd_backlight->report_id = FEATURE_KBD_REPORT_ID;
> + if (drvdata->quirks & QUIRK_ROG_NKEY_KEYBOARD && asus_kbd_is_input_led())
> + drvdata->kbd_backlight->report_id = FEATURE_KBD_LED_REPORT_ID1;
> +
> drvdata->kbd_backlight->removed = false;
> drvdata->kbd_backlight->brightness = 0;
> drvdata->kbd_backlight->hdev = hdev;
> -- 
> 2.45.1
> 
>