linux-kernel - Re: [PATCH] drm/panel: update innolux n116bge timings

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Date:	Mon, 22 Sep 2014 18:12:41 +0800
From:	Daniel Kurtz <djkurtz@...omium.org>
To:	Thierry Reding <thierry.reding@...il.com>
Cc:	dri-devel <dri-devel@...ts.freedesktop.org>,
	David Airlie <airlied@...ux.ie>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Stéphane Marchesin <marcheu@...omium.org>
Subject: Re: [PATCH] drm/panel: update innolux n116bge timings

On Mon, Sep 22, 2014 at 4:39 PM, Thierry Reding
<thierry.reding@...il.com> wrote:
>
> On Tue, Sep 02, 2014 at 10:56:46AM +0800, Daniel Kurtz wrote:
> > There are several different models of N116BGE.  According to the commit
> > that added innolux_n116bge_mode [0], this N116BGE is for the eDP variety.
> >
> > [0] commit 0a2288c06aab73c966e82045c8f20b0e713baf2a
> >  Author: Thierry Reding <treding@...dia.com>
> >  Date:   Thu Jul 3 14:02:59 2014 +0200
> >
> >    drm/panel: simple: Add Innolux N116BGE panel support
> >
> > The clock and htotal values from add by that patch are out of spec according to
> > the datasheets I have seen for the eDP N116BGE (-EA2 and -EB2).
>
> Does out of spec imply that these timings aren't working for you?

No, I didn't even try with your values, actually.
Out of spec just means that the numbers do not fall between Min and
Max on the datasheet:

72.6 <= DCLK <= 80.24 vs. 71
1506 <= htotal <= 1716 vs. 1500

> > This patch changes the values to the "Typ" values on the datasheet.
>
> The original patch was based on -E42 of the datasheet. But I can run
> some tests to see if the timings in this patch work on the panel that I
> have. If so I guess the easiest would be to apply this.

Thanks!

>
> It shouldn't matter all that much since the panel has EDID if I remember
> correctly. The modes parsed from EDID should take precedence over the
> fixed mode. If they don't then that's a bug.

The driver I am testing this with does not yet support reading the
EDID over eDP, so I am using the fixed values for now.

> Thierry
>
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