linux-kernel - Re: [v2] drm/msm/disp/dpu1: add safe lut config in dpu driver

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Message-ID: <CAE-0n52+PvNpz5uqf3O_NsfQ4q2taeZmdSdoM3fGDLp5aQVj-A@mail.gmail.com>
Date:   Tue, 3 Aug 2021 15:13:10 -0500
From:   Stephen Boyd <swboyd@...omium.org>
To:     Kalyan Thota <kalyan_t@...eaurora.org>, devicetree@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org,
        linux-arm-msm@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, robdclark@...il.com,
        dianders@...omium.org, mkrishn@...eaurora.org,
        saiprakash.ranjan@...eaurora.org, rnayak@...eaurora.org,
        stable@...r.kernel.org
Subject: Re: [v2] drm/msm/disp/dpu1: add safe lut config in dpu driver

Quoting Kalyan Thota (2021-08-03 03:41:47)
> Add safe lut configuration for all the targets in dpu
> driver as per QOS recommendation.
>
> Issue reported on SC7280:
>
> With wait-for-safe feature in smmu enabled, RT client
> buffer levels are checked to be safe before smmu invalidation.
> Since display was always set to unsafe it was delaying the
> invalidaiton process thus impacting the performance on NRT clients
> such as eMMC and NVMe.
>
> Validated this change on SC7280, With this change eMMC performance
> has improved significantly.
>
> Changes in v1:
> - Add fixes tag (Sai)
> - CC stable kernel (Dimtry)
>
> Fixes: cfacf946a464d4(drm/msm/disp/dpu1: add support for display for SC7280 target)

This is wrong format and commit hash

Fixes: 591e34a091d1 ("drm/msm/disp/dpu1: add support for display for
SC7280 target")

> Signed-off-by: Kalyan Thota <kalyan_t@...eaurora.org>
> Tested-by: Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org> (sc7280, sc7180)