linux-kernel - Re: [PATCH] drm/vc4: Fix HDMI mode validation

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Message-ID: <65a2d18ec2b901c6a89acc091cf9573a98fda75f.camel@suse.de>
Date:   Fri, 27 Mar 2020 12:46:52 +0100
From:   Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
To:     Eric Anholt <eric@...olt.net>,
        Daniel Vetter <daniel.vetter@...ll.ch>
Cc:     maxime@...no.tech, linux-rpi-kernel@...ts.infradead.org,
        f.fainelli@...il.com, Stefan Wahren <stefan.wahren@...e.com>,
        Dave Stevenson <dave.stevenson@...pberrypi.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm/vc4: Fix HDMI mode validation

Hi Daniel,

On Thu, 2020-03-26 at 13:20 +0100, Nicolas Saenz Julienne wrote:
> Current mode validation impedes setting up some video modes which should
> be supported otherwise. Namely 1920x1200@...z.
> 
> Fix this by lowering the minimum HDMI state machine clock to pixel clock
> ratio allowed.
> 
> Fixes: 32e823c63e90 ("drm/vc4: Reject HDMI modes with too high of clocks")
> Reported-by: Stefan Wahren <stefan.wahren@...e.com>
> Suggested-by: Dave Stevenson <dave.stevenson@...pberrypi.com>
> Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@...e.de>

Would it be possible for you to take this in for v5.7 (or as a fix for v5.6,
but it seems a little late)?

A device-tree patch I have to channel trough the SoC tree depends on this to
avoid regressions.

Regards,
Nicolas


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