Date:   Mon, 27 Feb 2023 07:38:21 +0100
From:   Gerd Hoffmann <kraxel@redhat.com>
To:     Rob Clark <robdclark@gmail.com>
Cc:     dri-devel@lists.freedesktop.org, Chia-I Wu <olvaffe@gmail.com>,
        Ryan Neph <ryanneph@chromium.org>,
        Dmitry Osipenko <dmitry.osipenko@collabora.com>,
        Rob Clark <robdclark@chromium.org>,
        David Airlie <airlied@redhat.com>,
        Gurchetan Singh <gurchetansingh@chromium.org>,
        Daniel Vetter <daniel@ffwll.ch>,
        "open list:VIRTIO GPU DRIVER" 
        <virtualization@lists.linux-foundation.org>,
        open list <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] drm/virtio: Add option to disable KMS support
Message-ID: <20230227063821.dg2gbjjwcekbxyzw@sirius.home.kraxel.org>
References: <20230224180225.2477641-1-robdclark@gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20230224180225.2477641-1-robdclark@gmail.com>
Precedence: bulk

On Fri, Feb 24, 2023 at 10:02:24AM -0800, Rob Clark wrote:
> From: Rob Clark <robdclark@chromium.org>
> 
> Add a build option to disable modesetting support.  This is useful in
> cases where the guest only needs to use the GPU in a headless mode, or
> (such as in the CrOS usage) window surfaces are proxied to a host
> compositor.

Why make that a compile time option?  There is a config option for the
number of scanouts (aka virtual displays) a device has.  Just set that
to zero (and fix the driver to not consider that configuration an
error).

take care,
  Gerd