linux-kernel - Re: [PATCH v1 3/3] drm/tegra: dc: Dedicate overlay plane to cursor on older Tegra's

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Message-ID: <20180315104511.GC15393@ulmo>
Date:   Thu, 15 Mar 2018 11:45:11 +0100
From:   Thierry Reding <thierry.reding@...il.com>
To:     Dmitry Osipenko <digetx@...il.com>
Cc:     dri-devel@...ts.freedesktop.org, linux-tegra@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 3/3] drm/tegra: dc: Dedicate overlay plane to cursor
 on older Tegra's

On Thu, Mar 15, 2018 at 04:00:25AM +0300, Dmitry Osipenko wrote:
> Older Tegra's do not support RGBA format for the cursor, but instead
> overlay plane could be used for it. Since there is no much use for the
> overlays on a regular desktop and HW-accelerated cursor is much better
> than a SW cursor, let's dedicate one overlay plane to the mouse cursor.
> 
> Signed-off-by: Dmitry Osipenko <digetx@...il.com>
> ---
>  drivers/gpu/drm/tegra/dc.c | 28 +++++++++++++++++++++++-----
>  1 file changed, 23 insertions(+), 5 deletions(-)

Applied. I'm not entirely happy that we need to sacrifice one of the
overlay windows for this, but you're right, it's probably okay given
how little planes are used on a regular desktop.

We could always provide a module parameter to switch this on and off
if that's ever something we want.

Applied, thanks.

Thierry

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