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From:   Dom Cobley <dom@raspberrypi.com>
Date:   Fri, 26 Aug 2022 15:56:18 +0100
Message-ID: <CANUESCG22TrxasYoE2U0OJ7TVzNAcs_9zkuAfBQfZrEbM4h9dg@mail.gmail.com>
Subject: Re: [PATCH v1 00/35] drm: Analog TV Improvements
To:     Mateusz Kwiatkowski <kfyatek@gmail.com>
Cc:     Maxime Ripard <maxime@cerno.tech>,
        =?UTF-8?Q?Noralf_Tr=C3=B8nnes?= <noralf@tronnes.org>,
        Jernej Skrabec <jernej.skrabec@gmail.com>,
        Martin Blumenstingl <martin.blumenstingl@googlemail.com>,
        Chen-Yu Tsai <wens@csie.org>,
        Philipp Zabel <p.zabel@pengutronix.de>,
        Jerome Brunet <jbrunet@baylibre.com>,
        Samuel Holland <samuel@sholland.org>,
        Thomas Zimmermann <tzimmermann@suse.de>,
        Daniel Vetter <daniel@ffwll.ch>, Emma Anholt <emma@anholt.net>,
        David Airlie <airlied@linux.ie>,
        Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
        Kevin Hilman <khilman@baylibre.com>,
        Neil Armstrong <narmstrong@baylibre.com>,
        linux-sunxi@lists.linux.dev, linux-kernel@vger.kernel.org,
        Phil Elwell <phil@raspberrypi.com>,
        linux-arm-kernel@lists.infradead.org,
        Geert Uytterhoeven <geert@linux-m68k.org>,
        Dave Stevenson <dave.stevenson@raspberrypi.com>,
        linux-amlogic@lists.infradead.org, dri-devel@lists.freedesktop.org
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On Fri, 26 Aug 2022 at 05:08, Mateusz Kwiatkowski <kfyatek@gmail.com> wrote:
> - Commenting out the pm_runtime_put() / pm_runtime_get_sync() calls in vc4_vec.c
> - Reverting this PR by Dom Cobley a.k.a. popcornmix:
>    https://github.com/raspberrypi/linux/pull/4639
>
> Either of these approaches makes VEC mode switching work again. Obviously
> neither is appropriate for a permanent solution.

Might be worth trying the latest rpi-update firmware.
There was a change that affects restoring PIXEL/VEC clocks after a
power domain cycle.
There is also a fix for a USB boot breakage.

If you still have an issue that occurs in downstream pi tree but not
upstream, then create a linux github issue.