Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
MIME-Version: 1.0
References: <20220312063437.19160-1-yuehaibing@huawei.com> <08e81f07-99d2-62a3-8eea-b2c0432b4d18@redhat.com>
In-Reply-To: <08e81f07-99d2-62a3-8eea-b2c0432b4d18@redhat.com>
From:   Geert Uytterhoeven <geert@linux-m68k.org>
Date:   Mon, 11 Apr 2022 15:49:38 +0200
Message-ID: <CAMuHMdVYtV9KHYqjcXS05XM+QqbCgPKB_uZCCAN0eAqHUmoeTg@mail.gmail.com>
Subject: Re: [PATCH -next] drm/solomon: Make DRM_SSD130X depends on MMU
To:     Javier Martinez Canillas <javierm@redhat.com>
Cc:     YueHaibing <yuehaibing@huawei.com>,
        David Airlie <airlied@linux.ie>,
        Daniel Vetter <daniel@ffwll.ch>,
        Maxime Ripard <maxime@cerno.tech>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        DRI Development <dri-devel@lists.freedesktop.org>
Content-Type: text/plain; charset="UTF-8"
Precedence: bulk

Hi Javier,

On Tue, Mar 15, 2022 at 12:28 PM Javier Martinez Canillas
<javierm@redhat.com> wrote:
> On 3/12/22 07:34, YueHaibing wrote:
> > WARNING: unmet direct dependencies detected for DRM_GEM_SHMEM_HELPER
> >   Depends on [n]: HAS_IOMEM [=y] && DRM [=m] && MMU [=n]
> >   Selected by [m]:
> >   - DRM_SSD130X [=m] && HAS_IOMEM [=y] && DRM [=m]
> >
> > DRM_GEM_SHMEM_HELPER depends on MMU, DRM_SSD130X should also depends on MMU.
> >
> > Fixes: a61732e80867 ("drm: Add driver for Solomon SSD130x OLED displays")
> > Signed-off-by: YueHaibing <yuehaibing@huawei.com>
> > ---
>
> Indeed. All the DRM drivers that select DRM_GEM_SHMEM_HELPER depend on MMU.

That's very unfortunate. Is there no way around this?

Else fbdev can never be deprecated in favor of DRM.

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds