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Date:   Mon, 29 Mar 2021 15:42:08 +0000
To:     Paul Cercueil <paul@crapouillou.net>
From:   Simon Ser <contact@emersion.fr>
Cc:     Maxime Ripard <maxime@cerno.tech>,
        Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
        Thomas Zimmermann <tzimmermann@suse.de>,
        David Airlie <airlied@linux.ie>,
        Daniel Vetter <daniel@ffwll.ch>, od@zcrc.me,
        dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org,
        stable@vger.kernel.org
Reply-To: Simon Ser <contact@emersion.fr>
Subject: Re: [PATCH] drm: DON'T require each CRTC to have a unique primary plane
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On Monday, March 29th, 2021 at 5:39 PM, Paul Cercueil <paul@crapouillou.net=
> wrote:

> Ok, I read that as "all drivers should provide AT LEAST one primary
> plane per CRTC", and not as "all drivers should provide ONE AND ONLY
> ONE primary plane per CRTC". My bad.

Yeah, it's a little complicated to document, because it's possible for
a primary plane to be compatible with multiple CRTCs=E2=80=A6 We tried to
improve this [1] recently.

[1]: https://dri.freedesktop.org/docs/drm/gpu/drm-kms.html#plane-abstractio=
n