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Subject: Re: [PATCH v3 0/2] allow simple{fb, drm} drivers to be used on
 non-x86 EFI platforms
To:     Javier Martinez Canillas <javierm@redhat.com>,
        linux-kernel@vger.kernel.org
Cc:     linux-efi@vger.kernel.org, David Airlie <airlied@linux.ie>,
        Catalin Marinas <catalin.marinas@arm.com>,
        dri-devel@lists.freedesktop.org, Atish Patra <atish.patra@wdc.com>,
        linux-riscv@lists.infradead.org, Will Deacon <will@kernel.org>,
        Ard Biesheuvel <ardb@kernel.org>, x86@kernel.org,
        Russell King <linux@armlinux.org.uk>,
        Ingo Molnar <mingo@redhat.com>,
        Peter Robinson <pbrobinson@gmail.com>,
        Borislav Petkov <bp@suse.de>,
        Albert Ou <aou@eecs.berkeley.edu>,
        Hans de Goede <hdegoede@redhat.com>,
        Paul Walmsley <paul.walmsley@sifive.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        linux-arm-kernel@lists.infradead.org,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Palmer Dabbelt <palmer@dabbelt.com>
References: <20210625130947.1803678-1-javierm@redhat.com>
 <e61cf77c-6bff-dfcc-d3df-2fb6b48e5897@redhat.com>
From:   Thomas Zimmermann <tzimmermann@suse.de>
Message-ID: <8dd26141-a09c-39e2-5174-4cad8d21c49c@suse.de>
Date:   Thu, 15 Jul 2021 10:11:50 +0200
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From: Thomas Zimmermann <tzimmermann@suse.de>
To: Javier Martinez Canillas <javierm@redhat.com>,
 linux-kernel@vger.kernel.org
Cc: linux-efi@vger.kernel.org, David Airlie <airlied@linux.ie>,
 Catalin Marinas <catalin.marinas@arm.com>, dri-devel@lists.freedesktop.org,
 Atish Patra <atish.patra@wdc.com>, linux-riscv@lists.infradead.org,
 Will Deacon <will@kernel.org>, Ard Biesheuvel <ardb@kernel.org>,
 x86@kernel.org, Russell King <linux@armlinux.org.uk>,
 Ingo Molnar <mingo@redhat.com>, Peter Robinson <pbrobinson@gmail.com>,
 Borislav Petkov <bp@suse.de>, Albert Ou <aou@eecs.berkeley.edu>,
 Hans de Goede <hdegoede@redhat.com>, Paul Walmsley
 <paul.walmsley@sifive.com>, Thomas Gleixner <tglx@linutronix.de>,
 linux-arm-kernel@lists.infradead.org,
 Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
 Palmer Dabbelt <palmer@dabbelt.com>
Message-ID: <8dd26141-a09c-39e2-5174-4cad8d21c49c@suse.de>
Subject: Re: [PATCH v3 0/2] allow simple{fb, drm} drivers to be used on
 non-x86 EFI platforms
References: <20210625130947.1803678-1-javierm@redhat.com>
 <e61cf77c-6bff-dfcc-d3df-2fb6b48e5897@redhat.com>
In-Reply-To: <e61cf77c-6bff-dfcc-d3df-2fb6b48e5897@redhat.com>

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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 Tree=
s
>> and there's a node with a "simple-framebuffer" compatible string.
>>
>> There is no code to register a "simple-framebuffer" platform device wh=
en
>> 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 i=
s
>> the only driver supported to have an early console with EFI on aarch64=
=2E
>>
>> 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 leg=
acy
>> VGA/EFI FB devices for the vgafb/efifb drivers.
>>
>> The sysfb is generic enough to be reused by other architectures and ca=
n 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.
>>
>=20
> 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.
>=20
> 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=20
already.

Best regards
Thomas

>=20
> Best regards,
>=20

--=20
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 N=C3=BCrnberg, Germany
(HRB 36809, AG N=C3=BCrnberg)
Gesch=C3=A4ftsf=C3=BChrer: Felix Imend=C3=B6rffer


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