linux-kernel - Re: [PATCH] drm/vc4: Limit SAND tiling support to semiplanar YUV420 formats

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Date:   Fri, 14 Dec 2018 08:16:32 -0800
From:   Eric Anholt <eric@...olt.net>
To:     Paul Kocialkowski <paul.kocialkowski@...tlin.com>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Cc:     David Airlie <airlied@...ux.ie>,
        Boris Brezillon <boris.brezillon@...tlin.com>,
        Eben Upton <eben@...pberrypi.org>,
        Maxime Ripard <maxime.ripard@...tlin.com>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        Paul Kocialkowski <paul.kocialkowski@...tlin.com>
Subject: Re: [PATCH] drm/vc4: Limit SAND tiling support to semiplanar YUV420 formats

Paul Kocialkowski <paul.kocialkowski@...tlin.com> writes:

> Despite what the HVS documentation indicates, the VC4 does not actually
> support SAND tiling modes for any RGB format and only semiplanar YUV420
> formats (NV12/NV21) can be used in these tiling modes.
>
> The driver currently claims to support RGB formats for the associated
> modifiers, so remove them from the supported list in the
> format_mod_supported helper for RGB formats.
>
> Remove further checks that are no longer necessary along the way, since
> semi-planar YUV420 formats support every SAND tiling mode.
>
> Signed-off-by: Paul Kocialkowski <paul.kocialkowski@...tlin.com>

Reviewed-by: Eric Anholt <eric@...olt.net>

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