linux-kernel - Re: [PATCH] drm/sun4i: de3: Be explicit about supported modifiers

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Date:   Mon, 7 Jun 2021 10:43:59 +0200
From:   Maxime Ripard <maxime@...no.tech>
To:     Jernej Skrabec <jernej.skrabec@...il.com>
Cc:     wens@...e.org, airlied@...ux.ie, daniel@...ll.ch,
        daniel.stone@...labora.com, dri-devel@...ts.freedesktop.org,
        linux-arm-kernel@...ts.infradead.org, linux-sunxi@...ts.linux.dev,
        linux-kernel@...r.kernel.org,
        Piotr Oniszczuk <piotr.oniszczuk@...il.com>
Subject: Re: [PATCH] drm/sun4i: de3: Be explicit about supported modifiers

On Sat, Jun 05, 2021 at 09:35:34AM +0200, Jernej Skrabec wrote:
> From: Piotr Oniszczuk <piotr.oniszczuk@...il.com>
> 
> Currently only linear formats are supported in sun4i-drm driver, but
> SoCs like H6 supports AFBC variant of some of them in multiple cores
> (GPU, VPU, DE3). Panfrost already implements AFBC compression and is
> sometimes confused what should be default choice (linear, AFBC) if DRM
> driver is not explicit about modifier support (MiniMyth2 distro with
> MythTV app).
> 
> After some discussion with Daniel Stone on #panfrost IRC, it was decided
> to make modifiers in sun4i-drm explicit, to avoid any kind of guessing,
> not just in panfrost, but everywhere. In fact, long term idea is to make
> modifier parameter in drm_universal_plane_init() mandatory (non NULL).
> 
> Signed-off-by: Piotr Oniszczuk <piotr.oniszczuk@...il.com>
> Signed-off-by: Jernej Skrabec <jernej.skrabec@...il.com>

Applied, thanks
Maxime

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