From mboxrd@z Thu Jan  1 00:00:00 1970
From: Maxime Ripard <maxime.ripard-LDxbnhwyfcJBDgjK7y7TUQ@public.gmane.org>
Subject: Re: Re: [PATCH RESEND v2 06/12] drm/sun4i: rgb: Add 1%
 tolerance to dclk frequency check when bridge is connected
Date: Tue, 5 Feb 2019 16:41:56 +0100
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To: Vasily Khoruzhick <anarsoul-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Cc: Icenowy Zheng <icenowy-h8G6r0blFSE@public.gmane.org>, arm-linux <linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org>, Mark Rutland <mark.rutland-5wv7dgnIgG8@public.gmane.org>, devicetree <devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>, Archit Taneja <architt-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>, David Airlie <airlied-cv59FeDIM0c@public.gmane.org>, linux-sunxi <linux-sunxi-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org>, dri-devel <dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org>, Andrzej Hajda <a.hajda-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>, Chen-Yu Tsai <wens-jdAy2FN1RRM@public.gmane.org>, Rob Herring <robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>, Thierry Reding <thierry.reding-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>, Laurent Pinchart <Laurent.pinchart-ryLnwIuWjnjg/C1BVhZhaw@public.gmane.org>, Daniel Vetter <daniel-/w4YWyX8dFk@public.gmane.org>, Sean Paul <seanpaul-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>
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On Mon, Feb 04, 2019 at 10:50:17AM -0800, Vasily Khoruzhick wrote:
> On Mon, Feb 4, 2019 at 8:29 AM Icenowy Zheng <icenowy-h8G6r0blFSE@public.gmane.org> wrote:
> > >> IIRC, from the previous discussion, HDMI had a tolerancy requirement
> > >> in the standard. Do you know if there's such a thing for eDP? That
> > >> would solve the issue for all the eDP displays at once.
> > >
> > >I don't have access to eDP standard - vesa.org says it's available to
> > >members only.
> >
> > Try out to grab an old version?
> >
> > I remember 1.0 is open.
> 
> I can't find anything regarding dot clock tolerance in DisplayPort
> specification.

I guess since the DP is a VESA spec, it's probably .5%, just like on
the EDID (well, CVT).

Maxime

-- 
Maxime Ripard, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com
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