linux-kernel - Re: [PATCH RFC 01/10] dt-bindings: gpu: Add PowerVR Series5 SGX GPUs

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Message-ID: <vawv2mwhonuyvgmp7uox4rfgdcjwg5fa7hmbcfgl3wiase6e4p@tyavpclppfvu>
Date:   Tue, 5 Dec 2023 14:29:27 +0100
From:   Maxime Ripard <mripard@...nel.org>
To:     "H. Nikolaus Schaller" <hns@...delico.com>
Cc:     Andrew Davis <afd@...com>, Frank Binns <frank.binns@...tec.com>,
        Donald Robson <donald.robson@...tec.com>,
        Matt Coster <matt.coster@...tec.com>,
        Adam Ford <aford173@...il.com>,
        Ivaylo Dimitrov <ivo.g.dimitrov.75@...il.com>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Samuel Holland <samuel@...lland.org>,
        Benoît Cousson <bcousson@...libre.com>,
        Tony Lindgren <tony@...mide.com>, Nishanth Menon <nm@...com>,
        Vignesh Raghavendra <vigneshr@...com>,
        Tero Kristo <kristo@...nel.org>,
        Paul Cercueil <paul@...pouillou.net>,
        dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-sunxi@...ts.linux.dev, linux-omap@...r.kernel.org,
        linux-mips@...r.kernel.org
Subject: Re: [PATCH RFC 01/10] dt-bindings: gpu: Add PowerVR Series5 SGX GPUs

Hi,

On Tue, Dec 05, 2023 at 09:18:58AM +0100, H. Nikolaus Schaller wrote:
> > Am 05.12.2023 um 07:57 schrieb Maxime Ripard <mripard@...nel.org>:
> > 
> > On Mon, Dec 04, 2023 at 12:22:36PM -0600, Andrew Davis wrote:
> >> The Imagination PowerVR Series5 "SGX" GPU is part of several SoCs from
> >> multiple vendors. Describe how the SGX GPU is integrated in these SoC,
> >> including register space and interrupts. Clocks, reset, and power domain
> >> information is SoC specific.
> >> 
> >> Signed-off-by: Andrew Davis <afd@...com>
> >> ---
> >> .../devicetree/bindings/gpu/img,powervr.yaml  | 69 +++++++++++++++++--
> >> 1 file changed, 63 insertions(+), 6 deletions(-)
> > 
> > I think it would be best to have a separate file for this, img,sgx.yaml
> > maybe?
> 
> Why?

Because it's more convenient?

> The whole family of IMG GPUs is PowerVR and SGX and Rogue are generations 5 and 6++:
> 
> https://en.wikipedia.org/wiki/PowerVR

That's not really relevant as far as bindings go. We have multiple
binding files for devices of the same generation, or single bindings
covering multiple generations.

The important part is that every compatible is documented. It doesn't
really matter how or where.

Maxime

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