linux-kernel - Re: [PATCH 2/2] drm/vc4: hdmi: Check the HSM rate at runtime

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Date:   Thu, 13 Oct 2022 11:43:15 +0200
From:   Javier Martinez Canillas <javierm@...hat.com>
To:     Maxime Ripard <maxime@...no.tech>, David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Maxime Ripard <mripard@...nel.org>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Emma Anholt <emma@...olt.net>
Cc:     Stefan Wahren <stefan.wahren@...e.com>,
        Marc Kleine-Budde <mkl@...gutronix.de>,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH 2/2] drm/vc4: hdmi: Check the HSM rate at runtime_resume

On 9/29/22 11:21, Maxime Ripard wrote:
> If our HSM clock has not been properly initialized, any register access
> will silently lock up the system.
> 
> Let's check that this can't happen by adding a check for the rate before
> any register access, and error out otherwise.
> 
> Link: https://lore.kernel.org/dri-devel/20220922145448.w3xfywkn5ecak2et@pengutronix.de/
> Signed-off-by: Maxime Ripard <maxime@...no.tech>
> ---

Reviewed-by: Javier Martinez Canillas <javierm@...hat.com>

-- 
Best regards,

Javier Martinez Canillas
Core Platforms
Red Hat