linux-kernel - Re: [PATCH 0/24] Introduce ff-memless-next as an improved replacement for ff-memless

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Message-ID: <CADbOyBRDbScJ-gG=vqc4boq8kkuJ_9Xt_6Kt5MkgbcTy2Mbvpw@mail.gmail.com>
Date:	Mon, 21 Apr 2014 13:25:09 +0200
From:	Elias Vanderstuyft <elias.vds@...il.com>
To:	Simon Wood <simon@...gewell.org>
Cc:	Michal MalÃ½ <madcatxster@...oid-pointer.net>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Jiri Kosina <jkosina@...e.cz>, linux-input@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/24] Introduce ff-memless-next as an improved replacement
 for ff-memless

On Mon, Apr 21, 2014 at 12:29 AM,  <simon@...gewell.org> wrote:
>
>> Did the WiiWheel have working FF_CONSTANT before this patchset?
>> It would be weird if yes, because lg4ff is also used for MOMO-Black
>> which works fine.
>
> Yes, I think that the force requested by fftest was just too weak to
> actually move the wheel. ffcfstress (or whatever it is called) works OK.

Ah, nice to hear.

I had some additional questions that might benefit to the porting of
the lgff and sony driver, concerning the optimal value for
FF_UPDATE_RATE (at the moment it defaults to a safe 50ms):
- Could you try to sniff FF command USB traffic with the Windows
driver of the WingMan Force, just to learn what the update interval is
when playing a ConstantForce effect with an envelope (I'm only
interested in the envelope part)?
- If official/decent Windows drivers are present for one of the Sony
controllers you have, can you please do the same, but now when playing
a vibration effect (using XInput)?

Elias
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