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

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Date:   Tue, 5 Dec 2023 09:18:58 +0100
From:   "H. Nikolaus Schaller" <hns@...delico.com>
To:     Maxime Ripard <mripard@...nel.org>
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



> 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?

The whole family of IMG GPUs is PowerVR and SGX and Rogue are generations 5 and 6++:

https://en.wikipedia.org/wiki/PowerVR

So I would suggest to keep either img,powervr.yaml for all of them or

img,powervr-sgx.yaml
img,powervr-rogue.yaml

etc.

But as far as I can see the hardware integration into SoC (and hence description)
is quite similar so a single file should suffice.

BR,
Nikolaus