linux-kernel - Re: [Resend v3] drm/msm/disp/dpu1: add safe lut config in dpu driver

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Date:   Wed, 4 Aug 2021 11:29:16 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Kalyan Thota <kalyan_t@...eaurora.org>
Cc:     dri-devel@...ts.freedesktop.org, linux-arm-msm@...r.kernel.org,
        freedreno@...ts.freedesktop.org, devicetree@...r.kernel.org,
        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: [Resend v3] drm/msm/disp/dpu1: add safe lut config in dpu driver

On Wed, Aug 04, 2021 at 01:38:33AM -0700, Kalyan Thota wrote:
> 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 v2:
> - Add fixes tag (Sai)
> - CC stable kernel (Dimtry)
> 
> Changes in v3:
> - Correct fixes tag with appropriate hash (stephen)
> - Resend patch adding reviewed by tag
> 
> Fixes: 591e34a091d1 ("drm/msm/disp/dpu1: add support for display for SC7280 target")
> Signed-off-by: Kalyan Thota <kalyan_t@...eaurora.org>
> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
> Tested-by: Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org> (sc7280, sc7180)
> ---
>  drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c | 5 +++++
>  1 file changed, 5 insertions(+)

<formletter>

This is not the correct way to submit patches for inclusion in the
stable kernel tree.  Please read:
    https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html
for how to do this properly.

</formletter>