From: richardcochran@gmail.com (Richard Cochran)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 1/4] input: touchscreen: ti_am335x_tsc Interchange touchscreen and ADC steps
Date: Fri, 7 Nov 2014 11:17:14 +0100 [thread overview]
Message-ID: <20141107101714.GA23102@netboy> (raw)
In-Reply-To: <545C59CD.3070707@ti.com>
On Fri, Nov 07, 2014 at 11:04:05AM +0530, Vignesh R wrote:
> Currently, there is too much noise in the TSC hardware that is being
> removed by delta filtering. I tested TSC unit by removing filtering
> logic, the performance was not at all satisfactory. The cursor jumps
> wayward and smooth circles cannot be drawn. Looks like delta filtering
> cannot be removed as of now. May be I will try and address it in future.
FWIW, on the boards that I tested, I printed the measured values out,
and I found that with 5 repetitions, I got the same value 5 times,
plus or minus a very small delta.
Thanks,
Richard
next prev parent reply other threads:[~2014-11-07 10:17 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-27 11:08 [PATCH 0/4] Touchscreen performance related fixes Vignesh R
2014-10-27 11:08 ` [PATCH 1/4] input: touchscreen: ti_am335x_tsc Interchange touchscreen and ADC steps Vignesh R
2014-10-31 21:03 ` Hartmut Knaack
2014-11-07 5:48 ` Vignesh R
2014-11-06 14:19 ` Richard Cochran
2014-11-07 5:34 ` Vignesh R
2014-11-07 8:00 ` Richard Cochran
2014-11-10 10:46 ` Vignesh R
2014-11-07 10:17 ` Richard Cochran [this message]
2014-10-27 11:08 ` [PATCH 2/4] input: touchscreen: ti_am335x_tsc: Remove udelay in interrupt handler Vignesh R
2014-11-03 15:05 ` Lee Jones
2014-11-07 5:48 ` Vignesh R
2014-10-27 11:08 ` [PATCH 3/4] arm: boot: dts: am335x-evm: Make charge delay a DT parameter for tsc Vignesh R
2014-10-31 21:09 ` Hartmut Knaack
2014-11-07 5:48 ` Vignesh R
2014-10-27 11:08 ` [PATCH 4/4] input: touchscreen: ti_am335x_tsc: Use charge delay DT parameter Vignesh R
2014-10-27 17:34 ` [PATCH 0/4] Touchscreen performance related fixes Sebastian Andrzej Siewior
2014-10-27 19:02 ` Griffis, Brad
2014-11-03 12:17 ` Sebastian Andrzej Siewior
2014-11-04 11:44 ` Vignesh R
2014-11-04 12:37 ` Sebastian Andrzej Siewior
2014-11-05 12:08 ` Vignesh R
2014-11-17 12:18 ` Vignesh R
2014-11-03 18:09 ` Richard Cochran
2014-11-06 7:42 ` Vignesh R
2014-11-12 13:00 ` Johannes Pointner
2014-11-13 12:23 ` Vignesh R
2014-11-17 11:39 ` Vignesh R
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