linux-kernel - Re: Why Cypress does not upstream its trackpad driver?

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Message-ID: <2208882.BvOrfBvj6F@dtor-d630.eng.vmware.com>
Date:	Wed, 07 Nov 2012 16:15:49 -0800
From:	Dmitry Torokhov <dmitry.torokhov@...il.com>
To:	David Solda <dso@...ress.com>
Cc:	Troy Abercrombia <ta@...ress.com>,
	Kamal Mostafa <kamal@...onical.com>,
	Ozan Çağlayan <ozancag@...il.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-input@...r.kernel.org" <linux-input@...r.kernel.org>,
	customercare <customercare@...ress.com>,
	"mario_limonciello@...l.com" <mario_limonciello@...l.com>
Subject: Re: Why Cypress does not upstream its trackpad driver?

Hi David,

On Wednesday, November 07, 2012 06:30:11 PM David Solda wrote:
> Kamal,
> 
> My name is Dave Solda and I would be happy to answer any other questions
> that you have. Troy's response is correct however as in order to support
> the default Linux mouse class, our firmware would also have to be modified
> to do so, which cannot be done in system. Our packet protocol maxes out at
> an 8 byte packet, which requires a change to the Linux standard in this
> case.

I am unable to parse this... I do not believe anyone asks you to change
your firmware and if your protocol needs 8 bytes to transmit device state -
that's fine.

> Our goal in working with canonical was to provide something on Linux that
> would support multi-touch and not only have default single finger movement
> supported.
 
> If I am mistaken and he Linux kernel would accept this, then we can proceed
> to upstream, however all indications we have is that this patch would be
> rejected.  If you (or others on from the locus alias) have any inputs, I
> would be happy to receive them.

This really depends on whether the changes to the psmouse framework make
sense or not. Please start submitting patches for review/discussion and
we can go from there.

Thanks.

-- 
Dmitry
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