linux-kernel - Re: [PATCH v6 1/9] drm/omap: add sanity plane state check

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Message-ID: <ea3d01fd-b723-b245-90cc-c5874f95122c@ideasonboard.com>
Date:   Wed, 27 Oct 2021 11:29:17 +0300
From:   Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
To:     Neil Armstrong <narmstrong@...libre.com>
Cc:     linux-omap@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, khilman@...libre.com,
        Benoit Parrot <bparrot@...com>
Subject: Re: [PATCH v6 1/9] drm/omap: add sanity plane state check

On 18/10/2021 17:28, Neil Armstrong wrote:
> Call drm_atomic_helper_check_plane_state() from the plane
> atomic_check() callback in order to add plane state sanity
> checking.
> 
> It will permit filtering out totally bad scaling factors, even
> if the real check are done later in the atomic commit.

I think there's more to it: the function sets plane_state->visible, 
which is used in later patches.

  Tomi