linux-kernel - Re: [PATCH] arm64: dts: qcom: sdm845-cheza: delete zap-shader

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Date:   Sun, 27 Oct 2019 00:40:32 -0500
From:   Andy Gross <agross@...nel.org>
To:     Doug Anderson <dianders@...omium.org>
Cc:     Rob Clark <robdclark@...il.com>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        Rob Clark <robdclark@...omium.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] arm64: dts: qcom: sdm845-cheza: delete zap-shader

On Fri, Oct 25, 2019 at 02:28:22PM -0700, Doug Anderson wrote:
> Hi,
> 
> On Fri, Oct 25, 2019 at 2:23 PM Rob Clark <robdclark@...il.com> wrote:
> >
> > From: Rob Clark <robdclark@...omium.org>
> >
> > This is unused on cheza.  Delete the node to get ride 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.
> >
> > (This also avoids a massive amount of dmesg spam about missing zap fw.)
> 
> optional nit: maybe when this is applied Bjorn / Andy can put in the
> actual error message to make this easier to find if anyone is seeing
> this problem.  Specifically:
> 
>   msm ae00000.mdss: [drm:adreno_request_fw] *ERROR* failed to load
> qcom/a630_zap.mdt: -2
>   adreno 5000000.gpu: [drm:adreno_zap_shader_load] *ERROR* Unable to
> load a630_zap.mdt
> 
> 
> > Signed-off-by: Rob Clark <robdclark@...omium.org>
> > Cc: Douglas Anderson <dianders@...omium.org>
> > ---
> >  arch/arm64/boot/dts/qcom/sdm845-cheza.dtsi | 2 ++
> >  arch/arm64/boot/dts/qcom/sdm845.dtsi       | 2 +-
> >  2 files changed, 3 insertions(+), 1 deletion(-)
> 
> I probably would have put it in two patches (one for sdm845.dtsi and
> one for cheza) but that's more because I'm obsessive-compulsive than
> for any real reason.  ;-)  In any case:
> 
> Fixes: 3fdeaee951aa ("arm64: dts: sdm845: Add zap shader region for GPU")
> Reviewed-by: Douglas Anderson <dianders@...omium.org>
> Tested-by: Douglas Anderson <dianders@...omium.org>

Applied this patch and added in the dmesg error messages.

Andy