linux-kernel - Re: [PATCH] drm/ingenic: ipu: Search for scaling coefs up to 102% of the screen

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Date:   Sat, 7 Nov 2020 20:33:11 +0100
From:   Sam Ravnborg <sam@...nborg.org>
To:     Paul Cercueil <paul@...pouillou.net>
Cc:     David Airlie <airlied@...ux.ie>, Daniel Vetter <daniel@...ll.ch>,
        od@...c.me, linux-kernel@...r.kernel.org,
        dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH] drm/ingenic: ipu: Search for scaling coefs up to 102% of
 the screen

Hi Paul.

On Thu, Nov 05, 2020 at 08:39:05AM +0000, Paul Cercueil wrote:
> Increase the scaled image's theorical width/height until we find a
> configuration that has valid scaling coefficients, up to 102% of the
> screen's resolution. This makes sure that we can scale from almost
> every resolution possible at the cost of a very small distorsion.
> The CRTC_W / CRTC_H are not modified.
> 
> This algorithm was already in place but would not try to go above the
> screen's resolution, and as a result would only work if the CRTC_W /
> CRTC_H were smaller than the screen resolution. It will now try until it
> reaches 102% of the screen's resolution.
> 
> Signed-off-by: Paul Cercueil <paul@...pouillou.net>

Looks like the patch does what the descriptions says.
So in other words - look OK to me. I am not confident enogh for a r-b
but my code reading is enough to warrant an a-b:
Acked-by: Sam Ravnborg <sam@...nborg.org>