linux-kernel - Re: [PATCH v5 1/8] dt-bindings: add img,pvrsgx.yaml for Imagination GPUs

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Date:   Fri, 10 Apr 2020 11:52:01 -0500
From:   Rob Herring <robh@...nel.org>
To:     "H. Nikolaus Schaller" <hns@...delico.com>
Cc:     David Airlie <airlied@...ux.ie>, Daniel Vetter <daniel@...ll.ch>,
        Mark Rutland <mark.rutland@....com>,
        Benoît Cousson <bcousson@...libre.com>,
        Tony Lindgren <tony@...mide.com>,
        Paul Cercueil <paul@...pouillou.net>,
        Ralf Baechle <ralf@...ux-mips.org>,
        Paul Burton <paulburton@...nel.org>,
        James Hogan <jhogan@...nel.org>,
        Philipp Rossak <embed3d@...il.com>,
        "open list:DRM PANEL DRIVERS" <dri-devel@...ts.freedesktop.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-omap <linux-omap@...r.kernel.org>,
        OpenPVRSGX Linux Driver Group <openpvrsgx-devgroup@...ux.org>,
        Discussions about the Letux Kernel 
        <letux-kernel@...nphoenux.org>, kernel@...a-handheld.com,
        linux-mips@...r.kernel.org
Subject: Re: [PATCH v5 1/8] dt-bindings: add img,pvrsgx.yaml for Imagination
 GPUs

On Tue, Apr 07, 2020 at 09:00:48AM +0200, H. Nikolaus Schaller wrote:
> 
> > Am 29.03.2020 um 19:38 schrieb H. Nikolaus Schaller <hns@...delico.com>:
> > 
> > The Imagination PVR/SGX GPU is part of several SoC from
> > multiple vendors, e.g. TI OMAP, Ingenic JZ4780, Intel Poulsbo,
> > Allwinner A83 and others.
> > 
> > With this binding, we describe how the SGX processor is
> > interfaced to the SoC (registers, interrupt etc.).
> > 
> > In most cases, Clock, Reset and power management is handled
> > by a parent node or elsewhere (e.g. code in the driver).
> > 
> > Tested by make dt_binding_check dtbs_check
> > 
> > Signed-off-by: H. Nikolaus Schaller <hns@...delico.com>
> > ---
> > .../devicetree/bindings/gpu/img,pvrsgx.yaml   | 109 ++++++++++++++++++
> > 1 file changed, 109 insertions(+)
> > create mode 100644 Documentation/devicetree/bindings/gpu/img,pvrsgx.yaml
> > 
> > diff --git a/Documentation/devicetree/bindings/gpu/img,pvrsgx.yaml b/Documentation/devicetree/bindings/gpu/img,pvrsgx.yaml
> > new file mode 100644
> > index 000000000000..aadfb2d9b012
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/gpu/img,pvrsgx.yaml
> > @@ -0,0 +1,109 @@
> > +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/gpu/img,pvrsgx.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Imagination PVR/SGX GPU
> > +
> > +maintainers:
> > +  - H. Nikolaus Schaller <hns@...delico.com>
> > +
> > +description: |+
> > +  This binding describes the Imagination SGX5 series of 3D accelerators which
> > +  are found in several different SoC like TI OMAP, Sitara, Ingenic JZ4780,
> > +  Allwinner A83, and Intel Poulsbo and CedarView and more.
> > +
> > +  For an extensive list see: https://en.wikipedia.org/wiki/PowerVR#Implementations
> > +
> > +  The SGX node is usually a child node of some DT node belonging to the SoC
> > +  which handles clocks, reset and general address space mapping of the SGX
> > +  register area.
> > +
> > +properties:
> > +  compatible:
> > +    oneOf:
> > +      - description: SGX530-121 based SoC
> > +        items:
> > +          - enum:
> > +            - ti,omap3-sgx530-121 # BeagleBoard A/B/C, OpenPandora 600MHz and similar
> > +          - const: img,sgx530-121
> > +          - const: img,sgx530
> > +
> > +      - description: SGX530-125 based SoC
> > +        items:
> > +          - enum:
> > +            - ti,am3352-sgx530-125 # BeagleBone Black
> > +            - ti,am3517-sgx530-125
> > +            - ti,am4-sgx530-125
> > +            - ti,omap3-sgx530-125 # BeagleBoard XM, GTA04, OpenPandora 1GHz and similar
> > +            - ti,ti81xx-sgx530-125
> > +          - const: ti,omap3-sgx530-125
> > +          - const: img,sgx530-125
> > +          - const: img,sgx530
> > +
> > +      - description: SGX535-116 based SoC
> > +        items:
> > +          - const: intel,poulsbo-gma500-sgx535 # Atom Z5xx
> > +          - const: img,sgx535-116
> > +          - const: img,sgx535
> > +
> > +      - description: SGX540-116 based SoC
> > +        items:
> > +          - const: intel,medfield-gma-sgx540 # Atom Z24xx
> > +          - const: img,sgx540-116
> > +          - const: img,sgx540
> > +
> > +      - description: SGX540-120 based SoC
> > +        items:
> > +          - enum:
> > +            - ingenic,jz4780-sgx540-120 # CI20
> > +            - ti,omap4-sgx540-120 # Pandaboard, Pandaboard ES and similar
> > +          - const: img,sgx540-120
> > +          - const: img,sgx540
> > +
> > +      - description: SGX544-112 based SoC
> > +        items:
> > +          - const: ti,omap4-sgx544-112
> > +          - const: img,sgx544-112
> > +          - const: img,sgx544
> > +
> > +      - description: SGX544-116 based SoC
> > +        items:
> > +          - enum:
> > +            - allwinner,sun8i-a83t-sgx544-116 # Banana-Pi-M3 (Allwinner A83T) and similar
> 
> Philipp Rossak reported on a different list [1] that the a83t tells to have a sgx544-115 inside.
> 
> So it needs a separate entry.

Okay, it looks fine otherwise.

Rob