linux-kernel - Re: [RFC PATCH 1/8] drm/panel: nv3052c: Document known register names

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Message-ID: <ZQKIED7jCc1FuPP1@titan>
Date:   Thu, 14 Sep 2023 14:12:00 +1000
From:   John Watts <contact@...kia.org>
To:     Jessica Zhang <quic_jesszhan@...cinc.com>
Cc:     dri-devel@...ts.freedesktop.org,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>, devicetree@...r.kernel.org,
        Sam Ravnborg <sam@...nborg.org>,
        Chris Morgan <macromorgan@...mail.com>,
        linux-kernel@...r.kernel.org, Jagan Teki <jagan@...eble.ai>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Shawn Guo <shawnguo@...nel.org>
Subject: Re: [RFC PATCH 1/8] drm/panel: nv3052c: Document known register names

On Wed, Sep 13, 2023 at 02:43:43PM -0700, Jessica Zhang wrote:
> Hi John,
> 
> Just curious, what do you mean by these registers being mostly unknown?
> 
> I do see them specified in the online specs -- some even seem to map to
> existing MIPI_DCS_* enums (ex. 0x01 to MIPI_DCS_SOFT_RESET, and 0x04 to
> MIPI_DCS_GET_DISPLAY_ID).
> 
> Thanks,
> 
> Jessica Zhang

Hi Jessica,

Unfortunately these registers are not MIPI ones, but on a separate page of
registers. So page 2 register 1 isn't MIPI_DCS_SOFT_RESET, that is page 0
register 1.

John.