linux-kernel - Re: [PATCH v6 5/7] drm/mediatek: dpi: Add dpintf support

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Date:   Fri, 26 Nov 2021 11:23:00 +0100
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     Guillaume Ranquet <granquet@...libre.com>,
        Chun-Kuang Hu <chunkuang.hu@...nel.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Matthias Brugger <matthias.bgg@...il.com>
Cc:     Markus Schneider-Pargmann <msp@...libre.com>,
        dri-devel@...ts.freedesktop.org,
        linux-mediatek@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6 5/7] drm/mediatek: dpi: Add dpintf support

Il 10/11/21 14:06, Guillaume Ranquet ha scritto:
> From: Markus Schneider-Pargmann <msp@...libre.com>
> 
> dpintf is the displayport interface hardware unit. This unit is similar
> to dpi and can reuse most of the code.
> 
> This patch adds support for mt8195-dpintf to this dpi driver. Main
> differences are:
>   - Some features/functional components are not available for dpintf
>     which are now excluded from code execution once is_dpintf is set
>   - dpintf can and needs to choose between different clockdividers based
>     on the clockspeed. This is done by choosing a different clock parent.
>   - There are two additional clocks that need to be managed. These are
>     only set for dpintf and will be set to NULL if not supplied. The
>     clk_* calls handle these as normal clocks then.
>   - Some register contents differ slightly between the two components. To
>     work around this I added register bits/masks with a DPINTF_ prefix
>     and use them where different.
> 
> Based on a separate driver for dpintf created by
> Jason-JH.Lin <jason-jh.lin@...iatek.com>.
> 
> Signed-off-by: Markus Schneider-Pargmann <msp@...libre.com>
> Signed-off-by: Guillaume Ranquet <granquet@...libre.com>


Hello Guillaume, Markus



Strictly speaking about functionality, the entire series is totally fine,

however, I cannot give you a R-b on patches 6 and 7, since this code should

*really* make use of phy_get(), like suggested by Vinod.



In any case, for this patch:



Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>