linux-kernel - Re: [PATCH 0/2] drm/vc4: hdmi: Fixes for the RaspberryPi 0-3 stalls

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Date:   Mon, 10 Oct 2022 18:38:59 +0200
From:   Stefan Wahren <stefan.wahren@...e.com>
To:     Maxime Ripard <maxime@...no.tech>, David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Emma Anholt <emma@...olt.net>
Cc:     dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Marc Kleine-Budde <mkl@...gutronix.de>
Subject: Re: [PATCH 0/2] drm/vc4: hdmi: Fixes for the RaspberryPi 0-3 stalls

Am 10.10.22 um 10:50 schrieb Maxime Ripard:
> Hi Mark, Stefan,
>
> On Thu, Sep 29, 2022 at 11:21:16AM +0200, Maxime Ripard wrote:
>> Here's a series addressing the current bug that has been reported for the
>> RaspberryPi3, where booting without an HDMI monitor attached and with vc4
>> compiled as a module will lead to a stuck system when the module is loaded.
>>
>> This is due to the HSM clock not being initialized by anyone, and thus not
>> being functional once we start accessing the HDMI registers.
>>
>> The first patch will fix this, and the second will make sure we avoid that
>> situation entirely in the future. This has been tested with 5.19.12. Earlier
>> versions might need a backport of 88110a9f6209 ("clk: bcm2835: fix
>> bcm2835_clock_choose_div").
> Could you test/review this?

Looks good to me:

Tested-by: Stefan Wahren <stefan.wahren@...e.com>

>
> Thanks
> Maxime