linux-kernel - Re: [RFC 3/3] arm64: dts: qcom: sdm845-cheza: delete zap-shader

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Message-ID: <CAD=FV=Xa0kAReU7CFvO8QiCRkNxGaQY_JohK+psykqeN9e+QJw@mail.gmail.com>
Date:   Wed, 15 May 2019 14:43:13 -0700
From:   Doug Anderson <dianders@...omium.org>
To:     Rob Clark <robdclark@...il.com>,
        Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        Rob Clark <robdclark@...omium.org>,
        Andy Gross <andy.gross@...aro.org>,
        David Brown <david.brown@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        devicetree@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
        Jordan Crouse <jcrouse@...eaurora.org>
Subject: Re: [RFC 3/3] arm64: dts: qcom: sdm845-cheza: delete zap-shader

Hi,

On Thu, May 9, 2019 at 12:08 PM Rob Clark <robdclark@...il.com> wrote:

> From: Rob Clark <robdclark@...omium.org>
>
> This is unused on cheza.  Delete the node to get rid of the reserved-
> memory section, and to avoid the driver from attempting to load a zap
> shader that doesn't exist every time it powers up the GPU.
>
> Signed-off-by: Rob Clark <robdclark@...omium.org>
> ---
>  arch/arm64/boot/dts/qcom/sdm845-cheza.dtsi | 2 ++
>  arch/arm64/boot/dts/qcom/sdm845.dtsi       | 2 +-

nit: up to Bjorn / Andy, but personally I'd put cheza and non-cheza
changes in two patches.


>  2 files changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/arch/arm64/boot/dts/qcom/sdm845-cheza.dtsi b/arch/arm64/boot/dts/qcom/sdm845-cheza.dtsi
> index 8ccbe246dff4..28c28517b21a 100644
> --- a/arch/arm64/boot/dts/qcom/sdm845-cheza.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sdm845-cheza.dtsi
> @@ -175,6 +175,8 @@
>  /delete-node/ &venus_mem;
>  /delete-node/ &cdsp_mem;
>  /delete-node/ &cdsp_pas;
> +/delete-node/ &zap_shader;

nit: I'd probably move the delete of the zap shader to a slightly
different place just because the rest of the lines here are deleting
reserved memory regions.

Other than nits this seems OK to me.  Not that I know anything about
the zap shader or why a zap shader wouldn't be appropriate for cheza.

-Doug