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[209.132.180.67]) by mx.google.com with ESMTP id b25si4675797eja.198.2019.09.19.06.47.28; Thu, 19 Sep 2019 06:47:52 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=collabora.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732090AbfISMc4 (ORCPT + 99 others); Thu, 19 Sep 2019 08:32:56 -0400 Received: from bhuna.collabora.co.uk ([46.235.227.227]:39878 "EHLO bhuna.collabora.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727980AbfISMc4 (ORCPT ); Thu, 19 Sep 2019 08:32:56 -0400 Received: from [127.0.0.1] (localhost [127.0.0.1]) (Authenticated sender: alyssa) with ESMTPSA id B8C1C28E946 Date: Thu, 19 Sep 2019 08:32:43 -0400 From: Alyssa Rosenzweig To: Nicolas Boichat Cc: Rob Herring , Matthias Brugger , Mark Rutland , devicetree@vger.kernel.org, "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" , "moderated list:ARM/Mediatek SoC support" , "linux-kernel@vger.kernel.org" , Nick Fan , Boris Brezillon , Douglas Anderson , Dominik Behr , Steven Price Subject: Re: [PATCH] arm64: dts: mt8183: Add node for the Mali GPU Message-ID: <20190919123243.GA3457@kevin> References: <20190905081546.42716-1-drinkcat@chromium.org> <20190913181729.GB3115@kevin> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="sm4nu43k4a2Rpi4c" Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --sm4nu43k4a2Rpi4c Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable > > By the time MT8183 shows up in more concrete devices, it will, certainly > > in kernel-space and likely in userspace as well. At present, the DDK can > > be modified to run on top of the in-tree Mali drivers, i.e. "Bifrost on > > mainline linux-next (+ page table/compatible patches), with blob > > userspace". > > > > While the open userspace isn't ready here quite yet, I would definitely > > encourage upstream kernel for ChromeOS, since then there's no need to > > maintain the out-of-tree GPU driver. >=20 > That's an interesting idea, I had no idea, thanks for the info! >=20 > Would that work with midgard as well? We have released hardware with > RK3288/3399, so it might be nice to experiment with these first. Yes, the above would work with Midgard as well with no changes needed. Ping Steven about thtat (CC'd). > > More immediately, per Rob's review, it's important that the bindings > > accepted upstream work with the in-tree Bifrost driver. Conceptually, > > once Mesa supports Bifrost, if I install Debian on a MT8183 board, > > everything should just work. I shouldn't need MT-specific changes / need > > to change names for the DT. Regardless of which kernel driver you end up > > using, minimally sharing the DT is good for everyone :-) >=20 > Yes. I'll try to dig further with MTK, but this may take some time. 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