Re: [PATCH] platform/x86: asus-wmi: Add keyboard backlight toggle support
From: Chris Chiu
Date: Wed May 02 2018 - 22:41:02 EST
On Wed, May 2, 2018 at 10:29 PM, Puma D. <puma.d@xxxxxx> wrote:
> On 02.05.2018 08:02, Chris Chiu wrote:
>>
>> Some Asus laptops like UX550GE has hotkey (Fn+F7) for keyboard
>> backlight toggle. In this UX550GE, the hotkey incremet the level
>> of brightness for each keypress from 1 to 3, and then switch it
>> off when the brightness has been the max. This commit interprets
>> the code 0xc7 generated from hotkey to KEY_KBDILLUMUP to increment
>> the brightness, then pass KEY_KBDILLUMTOGGLE to user space after
>> the brightness max been reached for switching the led off.
>>
>> https://phabricator.endlessm.com/T21390
>>
>> Signed-off-by: Chris Chiu <chiu@xxxxxxxxxxxx>
>> ---
>> drivers/platform/x86/asus-nb-wmi.c | 1 +
>> drivers/platform/x86/asus-wmi.c | 8 ++++++++
>> 2 files changed, 9 insertions(+)
>>
>> diff --git a/drivers/platform/x86/asus-nb-wmi.c
>> b/drivers/platform/x86/asus-nb-wmi.c
>> index 136ff2b..14c502e 100644
>> --- a/drivers/platform/x86/asus-nb-wmi.c
>> +++ b/drivers/platform/x86/asus-nb-wmi.c
>> @@ -496,6 +496,7 @@ static const struct key_entry asus_nb_wmi_keymap[] = {
>> { KE_KEY, 0xC4, { KEY_KBDILLUMUP } },
>> { KE_KEY, 0xC5, { KEY_KBDILLUMDOWN } },
>> { KE_IGNORE, 0xC6, }, /* Ambient Light Sensor notification */
>> + { KE_KEY, 0xC7, { KEY_KBDILLUMTOGGLE } },
>> { KE_END, 0},
>> };
>> diff --git a/drivers/platform/x86/asus-wmi.c
>> b/drivers/platform/x86/asus-wmi.c
>> index 1f6e68f..b64ff90 100644
>> --- a/drivers/platform/x86/asus-wmi.c
>> +++ b/drivers/platform/x86/asus-wmi.c
>> @@ -67,6 +67,7 @@ MODULE_LICENSE("GPL");
>> #define NOTIFY_BRNDOWN_MAX 0x2e
>> #define NOTIFY_KBD_BRTUP 0xc4
>> #define NOTIFY_KBD_BRTDWN 0xc5
>> +#define NOTIFY_KBD_BRTTOGGLE 0xc7
>> /* WMI Methods */
>> #define ASUS_WMI_METHODID_SPEC 0x43455053 /* BIOS
>> SPECification */
>> @@ -1745,6 +1746,13 @@ static void asus_wmi_notify(u32 value, void
>> *context)
>> }
>> }
>> + if (code == NOTIFY_KBD_BRTTOGGLE) {
>> + if (asus->kbd_led_wk < asus->kbd_led.max_brightness)
>> + code = NOTIFY_KBD_BRTUP;
>> + else
>> + code = NOTIFY_KBD_BRTTOGGLE;
>> + }
>
> Did you intend the else branch to be a noop?
>
Thanks for pointing out. The 'else' does want to do nothing special but
`Brightness Toggle` as the original code. I'll modify that and submit again.
>
>> +
>> if (is_display_toggle(code) &&
>> asus->driver->quirks->no_display_toggle)
>> goto exit;
>
>
>