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Message-ID: <166870059260.50677.7640208301376893584@Monstersaurus>
Date:   Thu, 17 Nov 2022 15:56:32 +0000
From:   Kieran Bingham <kieran.bingham+renesas@...asonboard.com>
To:     Geert Uytterhoeven <geert+renesas@...der.be>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Magnus Damm <magnus.damm@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Tomi Valkeinen <tomi.valkeinen@...asonboard.com>,
        devicetree@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, linux-renesas-soc@...r.kernel.org
Cc:     Andrzej Hajda <andrzej.hajda@...el.com>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Robert Foss <robert.foss@...aro.org>,
        Jonas Karlman <jonas@...boo.se>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Tomi Valkeinen <tomi.valkeinen+renesas@...asonboard.com>
Subject: Re: [PATCH v1 7/8] drm: rcar-du: dsi: Add r8A779g0 support

Quoting Tomi Valkeinen (2022-11-17 15:49:36)
> On 17/11/2022 17:46, Kieran Bingham wrote:
> >> +       if (ret)
> >> +               return ret;
> >> +
> >> +       if (setup_info->hsfreq <= MHZ(1000))
> >> +               ret = WRITE_PHTW(0x01020100, 0x01910170, 0x01020171,
> >> +                                0x01110172);
> > The <=1Gbps reads:
> > 
> > <=1Gbps
> > 
> > Set PHTW=H’01020100
> > Set PHTW=H’01010172
> > Set PHTW=H’01570170
> > Set PHTW=H’01060171
> > Set PHTW=H’01110172
> > 
> > Is it clear why theres a difference here?
> 
> What doc is that? Mine (R19UH0172EJ0054 Rev.0.54) says:

Hrm ... mine is R19UH0172EJ0051 ... So I guess I'm on an outdated
datasheet.

Which leaves me pondering if I should just wave my hand over my eyes and
add a tag ... (Or see if I can dig up the later datasheet) ;-)

--
Kieran


> 
> Set PHTW=H’01020100
> Set PHTW=H’01910170
> Set PHTW=H’01020171
> Set PHTW=H’01110172
> 
>   Tomi
>

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