linux-kernel - Re: [PATCH] drm/msm/dpu: Add missing safe_lut

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Date:   Fri, 1 Dec 2023 08:28:55 -0800
From:   Bjorn Andersson <quic_bjorande@...cinc.com>
To:     Johan Hovold <johan@...nel.org>
CC:     Rob Clark <robdclark@...il.com>,
        Abhinav Kumar <quic_abhinavk@...cinc.com>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Sean Paul <sean@...rly.run>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        "Bjorn Andersson" <andersson@...nel.org>,
        <linux-arm-msm@...r.kernel.org>,
        Rob Clark <robdclark@...omium.org>,
        <dri-devel@...ts.freedesktop.org>,
        <freedreno@...ts.freedesktop.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] drm/msm/dpu: Add missing safe_lut_tbl in sc8180x catalog

On Fri, Dec 01, 2023 at 09:06:45AM +0100, Johan Hovold wrote:
> On Thu, Nov 30, 2023 at 04:35:01PM -0800, Bjorn Andersson wrote:
> > Similar to SC8280XP, the misconfigured SAFE logic causes rather
> > significant delays in __arm_smmu_tlb_sync(), resulting in poor
> > performance for things such as USB.
> > 
> > Introduce appropriate SAFE values for SC8180X to correct this.
> > 
> > Fixes: f3af2d6ee9ab ("drm/msm/dpu: Add SC8180x to hw catalog")
> 
> Missing CC stable tag?
> 

I figured it doesn't matter in practice, there's still a few issues left
preventing people from just running a stable kernel on this platform.

But it would be the right thing to do...

Cc: stable@...r.kernel.org

Regards,
Bjorn

> > Signed-off-by: Bjorn Andersson <quic_bjorande@...cinc.com>
> 
> Johan
>