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From:   Dave Airlie <airlied@gmail.com>
Date:   Mon, 19 Jul 2021 12:59:06 +1000
Message-ID: <CAPM=9tyfNPa2f5PDBLm4w_H_riEQ5P3rEhX73YGE1y_ygRox+w@mail.gmail.com>
Subject: Re: [PATCH v3 0/2] allow simple{fb, drm} drivers to be used on
 non-x86 EFI platforms
To:     Thomas Zimmermann <tzimmermann@suse.de>
Cc:     Javier Martinez Canillas <javierm@redhat.com>,
        LKML <linux-kernel@vger.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
        linux-efi@vger.kernel.org, Hans de Goede <hdegoede@redhat.com>,
        David Airlie <airlied@linux.ie>,
        Catalin Marinas <catalin.marinas@arm.com>,
        "the arch/x86 maintainers" <x86@kernel.org>,
        Russell King <linux@armlinux.org.uk>,
        dri-devel <dri-devel@lists.freedesktop.org>,
        Atish Patra <atish.patra@wdc.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Ingo Molnar <mingo@redhat.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Peter Robinson <pbrobinson@gmail.com>,
        Paul Walmsley <paul.walmsley@sifive.com>,
        Palmer Dabbelt <palmer@dabbelt.com>,
        linux-riscv@lists.infradead.org, Borislav Petkov <bp@suse.de>,
        Will Deacon <will@kernel.org>,
        Ard Biesheuvel <ardb@kernel.org>,
        Albert Ou <aou@eecs.berkeley.edu>
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On Thu, 15 Jul 2021 at 18:11, Thomas Zimmermann <tzimmermann@suse.de> wrote:
>
> Hi
>
> Am 13.07.21 um 18:59 schrieb Javier Martinez Canillas:
> > On 6/25/21 3:09 PM, Javier Martinez Canillas wrote:
> >> The simplefb and simpledrm drivers match against a "simple-framebuffer"
> >> device, but for aarch64 this is only registered when using Device Trees
> >> and there's a node with a "simple-framebuffer" compatible string.
> >>
> >> There is no code to register a "simple-framebuffer" platform device when
> >> using EFI instead. In fact, the only platform device that's registered in
> >> this case is an "efi-framebuffer", which means that the efifb driver is
> >> the only driver supported to have an early console with EFI on aarch64.
> >>
> >> The x86 architecture platform has a Generic System Framebuffers (sysfb)
> >> support, that register a system frambuffer platform device. It either
> >> registers a "simple-framebuffer" for the simple{fb,drm} drivers or legacy
> >> VGA/EFI FB devices for the vgafb/efifb drivers.
> >>
> >> The sysfb is generic enough to be reused by other architectures and can be
> >> moved out of the arch/x86 directory to drivers/firmware, allowing the EFI
> >> logic used by non-x86 architectures to be folded into sysfb as well.
> >>
> >
> > Any more comments on this series? It would be nice for this to land so the
> > simpledrm driver could be used on aarch64 EFI systems as well.
> >
> > The patches have already been acked by x86 and DRM folks.
>
> Time to get this merged, I'd say. People are asking for these patches
> already.

Can we just merge via drm-misc and make sure the acks are present and
I'll deal with the fallout if any.

Dave.