From mboxrd@z Thu Jan  1 00:00:00 1970
From: viresh.kumar@linaro.org (Viresh Kumar)
Date: Tue, 25 Apr 2017 16:43:01 +0530
Subject: Touchscreen failure with CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND
In-Reply-To: <CAOMZO5BgjgxGhJ7zGV-gjs0QHmJMgkNryFqTYA=vGPz8KWDijg@mail.gmail.com>
References: <CAOMZO5BZ8Z8dfwsfuiunNQ_q39_k4QJg7jLPQfaxn+YBsmz2jw@mail.gmail.com>
 <20170424040709.GG26900@vireshk-i7>
 <CAOMZO5B4_xrLcWQGF=yRfj-14XQKudzjyr2roGRkzofkHCfuHg@mail.gmail.com>
 <20170424112906.GR26900@vireshk-i7>
 <CAOMZO5BpAsJAKv-p=WPevUnx71fxbLtunJe-0ijVT7T9m7AMSQ@mail.gmail.com>
 <20170424114343.GS26900@vireshk-i7>
 <CAOMZO5AkTKjU5kw0gszLVdVOc_Sb_sWhr65heE==kyw=5rcN-g@mail.gmail.com>
 <20170425050633.GV26900@vireshk-i7>
 <CAOMZO5BgjgxGhJ7zGV-gjs0QHmJMgkNryFqTYA=vGPz8KWDijg@mail.gmail.com>
Message-ID: <20170425111301.GC1928@vireshk-i7>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

On 25-04-17, 08:09, Fabio Estevam wrote:
> Hi Viresh,
> 
> On Tue, Apr 25, 2017 at 2:06 AM, Viresh Kumar <viresh.kumar@linaro.org> wrote:
> 
> > Honestly, I don't have a clue on how can we fix it for you now :)
> >
> > @Rafael: Any idea apart from running at max all the time?
> >
> > what touchscreen driver are you using btw? Just curious to see if there is any
> > bug in there. Handling touchscreen events shouldn't require us to run at max
> > freq.
> 
> imx6q-sabresd board uses a drivers/input/touchscreen/egalax_ts.c touchscreen.
> 
> >
> > @shawn: Saw something similar ever ?
> 
> I do not see the problem with the NXP kernel, but was not able to
> identify what makes the touchscreen not to fail at 396MHz in their
> kernel.

@Shawn/Sascha: Can you guys help here? This looks to be some imx
specific stuff now.

-- 
viresh