Re: [PATCH RESEND v2] HID: winwing: Enable rumble effects

[Ivan Gorinov]

On 2026-02-26 06:58, Jiri Kosina wrote:

> On Thu, 26 Feb 2026, Ivan Gorinov wrote:
>
> > Enable rumble motor control on TGRIP-15E and TGRIP-15EX throttle grips
> > by sending haptic feedback commands (EV_FF events) to the input 
> > device.
> >
> > Signed-off-by: Ivan Gorinov <linux-kernel@xxxxxxxxxxxxxx>
> [ ... snip ... ]
>
> > +
> > +        buf[0] = 0x02;
> > +        buf[1] = 0x03;
> > +        buf[2] = 0xbf;
> > +        buf[3] = 0x00;
> > +        buf[4] = 0x00;
> > +        buf[5] = 0x03;
> > +        buf[6] = 0x49;
> > +        buf[7] = 0x00;
> > +        buf[8] = m;
> > +        buf[9] = 0x00;
> > +        buf[10] = 0;
> > +        buf[11] = 0;
> > +        buf[12] = 0;
> > +        buf[13] = 0;
>
> Do these magic numbers have any real meaning, or is it just mimicking
> observed binary stream?
> It'd be nice to have at least short comment explaining it.

Mimicking USB requests captured by usbmon when the vendor's app is 
running in a Win10 VM (Qemu).
I will add some comments.