linux-kernel - Re: [PATCH v5 2/7] dt-bindings: display: msm: gmu: add optional ocmem property

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Message-ID: <20190821192602.GA16243@bogus>
Date:   Wed, 21 Aug 2019 14:26:02 -0500
From:   Rob Herring <robh@...nel.org>
To:     Brian Masney <masneyb@...tation.org>
Cc:     agross@...nel.org, robdclark@...il.com, sean@...rly.run,
        bjorn.andersson@...aro.org, airlied@...ux.ie, daniel@...ll.ch,
        mark.rutland@....com, jonathan@...ek.ca,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org,
        devicetree@...r.kernel.org, jcrouse@...eaurora.org
Subject: Re: [PATCH v5 2/7] dt-bindings: display: msm: gmu: add optional
 ocmem property

On Mon, Aug 05, 2019 at 08:22:24PM -0400, Brian Masney wrote:
> Some A3xx and A4xx Adreno GPUs do not have GMEM inside the GPU core and
> must use the On Chip MEMory (OCMEM) in order to be functional. Add the
> optional ocmem property to the Adreno Graphics Management Unit bindings.
> 
> Signed-off-by: Brian Masney <masneyb@...tation.org>
> ---
> Changes since v4:
> - None
> 
> Changes since v3:
> - correct link to qcom,ocmem.yaml
> 
> Changes since v2:
> - Add a3xx example with OCMEM
> 
> Changes since v1:
> - None
> 
>  .../devicetree/bindings/display/msm/gmu.txt   | 50 +++++++++++++++++++
>  1 file changed, 50 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/display/msm/gmu.txt b/Documentation/devicetree/bindings/display/msm/gmu.txt
> index 90af5b0a56a9..672d557caba4 100644
> --- a/Documentation/devicetree/bindings/display/msm/gmu.txt
> +++ b/Documentation/devicetree/bindings/display/msm/gmu.txt
> @@ -31,6 +31,10 @@ Required properties:
>  - iommus: phandle to the adreno iommu
>  - operating-points-v2: phandle to the OPP operating points
>  
> +Optional properties:
> +- ocmem: phandle to the On Chip Memory (OCMEM) that's present on some Snapdragon
> +         SoCs. See Documentation/devicetree/bindings/sram/qcom,ocmem.yaml.

Sigh, to repeat my comment on v1 and v3:

We already have a couple of similar properties. Lets standardize on
'sram' as that is what TI already uses.

Rob