linux-kernel - Re: [PATCH] drm/bridge: anx7625: Use uint8 for lane-swing arrays

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Message-ID: <CAG3jFytRcM2bnKu0gLwZ9Wyn5eRvO16+OLJHt+a=pAAM9a=vww@mail.gmail.com>
Date:   Tue, 19 Apr 2022 19:00:50 +0200
From:   Robert Foss <robert.foss@...aro.org>
To:     AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
Cc:     Nícolas F. R. A. Prado 
        <nfraprado@...labora.com>,
        Neil Armstrong <narmstrong@...libre.com>,
        Andrzej Hajda <andrzej.hajda@...el.com>, kernel@...labora.com,
        Daniel Vetter <daniel@...ll.ch>,
        David Airlie <airlied@...ux.ie>,
        Hsin-Yi Wang <hsinyi@...omium.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Jonas Karlman <jonas@...boo.se>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Maxime Ripard <maxime@...no.tech>,
        Pi-Hsun Shih <pihsun@...omium.org>,
        Sam Ravnborg <sam@...nborg.org>,
        Tzung-Bi Shih <tzungbi@...gle.com>,
        Xin Ji <xji@...logixsemi.com>, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm/bridge: anx7625: Use uint8 for lane-swing arrays

On Fri, 8 Apr 2022 at 10:21, AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com> wrote:
>
> Il 08/04/22 03:30, Nícolas F. R. A. Prado ha scritto:
> > As defined in the anx7625 dt-binding, the analogix,lane0-swing and
> > analogix,lane1-swing properties are uint8 arrays. Yet, the driver was
> > reading the array as if it were of uint32 and masking to 8-bit before
> > writing to the registers. This means that a devicetree written in
> > accordance to the dt-binding would have its values incorrectly parsed.
> >
> > Fix the issue by reading the array as uint8 and storing them as uint8
> > internally, so that we can also drop the masking when writing the
> > registers.
> >
> > Fixes: fd0310b6fe7d ("drm/bridge: anx7625: add MIPI DPI input feature")
> > Signed-off-by: Nícolas F. R. A. Prado <nfraprado@...labora.com>
> >
>
> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>

Applied to drm-misc-next