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Date:   Tue, 6 Jul 2021 11:25:43 +0200
From:   Maxime Ripard <maxime@cerno.tech>
To:     dri-devel@lists.freedesktop.org,
        Daniel Vetter <daniel.vetter@intel.com>,
        David Airlie <airlied@linux.ie>,
        Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
        Thomas Zimmermann <tzimmermann@suse.de>
Cc:     Emma Anholt <emma@anholt.net>, Daniel Vetter <daniel@ffwll.ch>,
        linux-kernel@vger.kernel.org,
        Nicolas Saenz Julienne <nsaenz@kernel.org>,
        linux-rpi-kernel@lists.infradead.org,
        bcm-kernel-feedback-list@broadcom.com,
        Dave Stevenson <dave.stevenson@raspberrypi.com>,
        Phil Elwell <phil@raspberrypi.com>,
        Tim Gover <tim.gover@raspberrypi.com>,
        Dom Cobley <dom@raspberrypi.com>
Subject: Re: [PATCH] drm: vc4: Fix pixel-wrap issue with DVP teardown
Message-ID: <20210706092543.ek2by2utlc75bhl5@gilmour>
References: <20210628130533.144617-1-maxime@cerno.tech>
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On Mon, Jun 28, 2021 at 03:05:33PM +0200, Maxime Ripard wrote:
> From: Tim Gover <tim.gover@raspberrypi.com>
>=20
> Adjust the DVP enable/disable sequence to avoid a pixel getting stuck
> in an internal, non resettable FIFO within PixelValve when changing
> HDMI resolution.
>=20
> The blank pixels features of the DVP can prevent signals back to
> pixelvalve causing it to not clear the FIFO. Adjust the ordering
> and timing of operations to ensure the clear signal makes it through to
> pixelvalve.
>=20
> Signed-off-by: Tim Gover <tim.gover@raspberrypi.com>
> Signed-off-by: Maxime Ripard <maxime@cerno.tech>

Applied

Maxime

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