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

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Message-ID: <ZWmUFdWif3QGrqQc@hovoldconsulting.com>
Date:   Fri, 1 Dec 2023 09:06:45 +0100
From:   Johan Hovold <johan@...nel.org>
To:     Bjorn Andersson <quic_bjorande@...cinc.com>
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 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?

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

Johan