linux-kernel - Re: [PATCH v5] Fix the resolution issue in ChromeOS

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Date:	Fri, 12 Jun 2015 12:02:26 +0200
From:	Frans Klaver <fransklaver@...il.com>
To:	Hn Chen <hn.chen@...dahitech.com>
Cc:	linux-input@...r.kernel.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>
Subject: Re: [PATCH v5] Fix the resolution issue in ChromeOS

On Wed, Jun 10, 2015 at 4:51 PM, Hn Chen <hn.chen@...dahitech.com> wrote:
> Hi, Frans,
>
>> Alright, I was just wondering. Seems like a waste to be waiting for something that's already finished ;-).
>> There's of course a risk that times may fluctuate between firmware versions. Did you take that into account in the code?
>> Or is there a hard maximum time for these operations defined for the firmware?
> Thanks for your reminding.
> After I check with the firmware guy, I will change the value of delay.
> What we do here is to read the data from flash and calculate their checksum and
> will cost about 6ms for 1024 bytes. So there is a delay for 10 ms per 1024 bytes.
> But in some situation, the controller will change it's running frequency(like do noise immunity),
> 10ms could be too margin.

Any chance this sort of thing could be detected?
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