Re: omap3evm: touchscreen delays on pm branch

["Hemanth V" <hemanthv@ti.com>]

----- Original Message ----- 
From: "Premi, Sanjeev" <premi@ti.com>
To: <linux-omap@vger.kernel.org>
Sent: Thursday, November 26, 2009 10:32 PM
Subject: omap3evm: touchscreen delays on pm branch


> Hi,
> 
> I am finding the response of touchscreen on the omap3evm very slow.
> 
> Here is my test:
> On console, I run : watch -n2 "cat /proc/interrupts"
> Then, I tap the touchscreen approximately once per second. However,
> (usually) no interrupts are registered. As I increase the frequency
> of 'taps' more and more interrupts are registered. But still not
> matching exact taps.
> 
> However, when I keep the cpu busy with "cat /dev/zero > /dev/null &"
> each tap is recognized.
> 
> EVM uses GPIO175 for touchscreen. I notice that Zoom2 uses GPIO102.
> Both are not on BANK0.
> 
> Is the behavior same on ZOOM2 as well?

I dont see this problem on Zoom2/Zoom3, I am able to see interrupts being
incremented for every touch.

> 
> Best regards,
> Sanjeev
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