linux-kernel - Re: (subset) [PATCH v3 08/14] sun4i/drm: sun8i: use mode

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Date:   Tue, 26 Apr 2022 14:41:37 +0200
From:   Maxime Ripard <maxime@...no.tech>
To:     Chen-Yu Tsai <wens@...e.org>, Maxime Ripard <mripard@...nel.org>,
        Samuel Holland <samuel@...lland.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>
Cc:     Maxime Ripard <maxime@...no.tech>, David Airlie <airlied@...ux.ie>,
        linux-kernel@...r.kernel.org, Rob Herring <robh+dt@...nel.org>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-sunxi@...ts.linux.dev, Daniel Vetter <daniel@...ll.ch>,
        dri-devel@...ts.freedesktop.org,
        Krzysztof Kozlowski <krzk+dt@...nel.org>
Subject: Re: (subset) [PATCH v3 08/14] sun4i/drm: sun8i: use mode_set engine callback

On Sun, 24 Apr 2022 11:26:26 -0500, Samuel Holland wrote:
> From: Jernej Skrabec <jernej.skrabec@...il.com>
> 
> Newly introduced mode_set callback in engine structure is a much better
> place for setting mixer output size and interlace mode for the following
> reasons:
> 1. Aforementioned properties change only when mode changes, so it's
>    enough to be set only once per mode set. Currently it's done whenever
>    properties of primary plane are changed.
> 2. It's assumed that primary plane will always cover whole screen. While
>    this is true most of the time, it's not always. DE2/3 planes are
>    universal and mostly equal in functionality. There is no reason to
>    add artificial limitation to primary planes.
> 3. The current code only works for UI layers, but some mixers do not
>    have any UI layers.
> 
> [...]

Applied to drm/drm-misc (drm-misc-next).

Thanks!
Maxime