linux-kernel - Re: [PATCH] drm/msm/dp: Shorten SETUP timeout

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Message-ID: <CAE-0n52wN1s=Ph4r4iLposxNPfa562Bv1mM81j1KvNmWOQS1-Q@mail.gmail.com>
Date:   Tue, 5 Oct 2021 11:45:50 -0700
From:   Stephen Boyd <swboyd@...omium.org>
To:     Abhinav Kumar <abhinavk@...eaurora.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Daniel Vetter <daniel@...ll.ch>,
        David Airlie <airlied@...ux.ie>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Kuogee Hsieh <khsieh@...eaurora.org>,
        Rob Clark <robdclark@...il.com>, Sean Paul <sean@...rly.run>
Cc:     linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Sankeerth Billakanti <sbillaka@...eaurora.org>
Subject: Re: [PATCH] drm/msm/dp: Shorten SETUP timeout

Quoting Bjorn Andersson (2021-10-04 19:37:50)
> Found in the middle of a patch from Sankeerth was the reduction of the
> INIT_SETUP timeout from 10s to 100ms. Upon INIT_SETUP timeout the host
> is initalized and HPD interrupt start to be serviced, so in the case of
> eDP this reduction improves the user experience dramatically - i.e.
> removes 9.9s of bland screen time at boot.
>
> Suggested-by: Sankeerth Billakanti <sbillaka@...eaurora.org>
> Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
> ---

Any Fixes tag? BTW, the delay design is pretty convoluted. I had to go
re-read the code a couple times to understand that it's waiting 100ms
times the 'delay' number. Whaaaaat?

Reviewed-by: Stephen Boyd <swboyd@...omium.org>