[PATCH v5 1/2] drm/bridge: Add sii902x driver

Boris Brezillon boris.brezillon at free-electrons.com
Tue Jun 7 05:31:59 UTC 2016


Hi Meng,

On Tue, 7 Jun 2016 02:40:56 +0000
Meng Yi <meng.yi at nxp.com> wrote:

> Hi Boris,
> 
> Sorry for reply late, I was on PTO. And another PTO on  June 9~11, 2016.UTC+8
> 
> >  
> > > > +       gpiod_set_value(sii902x->reset_gpio, 1);
> > > > +
> > > > +       msleep(100);  
> > > Ouch that is some juicy number. Can we get a comment with
> > > reasoning/origin of it ?  
> > 
> > As already explained to Maxime, I just don't know why this is needed, simply
> > because I don't have access to the datasheet and I just based my
> > implementation on another driver.
> > I can add a comment stating that this was extracted from another
> > implementation, but with no explanation on why this is needed.
> > 
> > Meng, do you have any information about startup-time, or something like that?
> >   
> 
> I had checked the datasheet of sii9022a, which said the Min of TRESET is 100 μs, and Max is not specified.

Oh, thanks a lot. treset-min is exactly what I needed.

Regards,

Boris

-- 
Boris Brezillon, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com


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