linux-kernel - Re: [PATCH v2 6/7] drm/msm/dp: do not end dp link training until video is ready

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Message-ID: <CAE-0n53e0cM2dFxwOGwUTW+u-X8yTPka1HyzAPPcuwq43zBh4w@mail.gmail.com>
Date:   Thu, 22 Jul 2021 19:15:49 +0000
From:   Stephen Boyd <swboyd@...omium.org>
To:     Kuogee Hsieh <khsieh@...eaurora.org>,
        dri-devel@...ts.freedesktop.org, robdclark@...il.com,
        sean@...rly.run
Cc:     abhinavk@...eaurora.org, aravindh@...eaurora.org, airlied@...ux.ie,
        daniel@...ll.ch, bjorn.andersson@...aro.org,
        linux-arm-msm@...r.kernel.org, freedreno@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 6/7] drm/msm/dp: do not end dp link training until
 video is ready

Quoting Kuogee Hsieh (2021-07-13 08:54:06)
> Initialize both pre-emphasis and voltage swing level to 0 before
> start link training and do not end link training until video is
> ready to reduce the period between end of link training and video
> start to meet Link Layer CTS requirement.  This fixes Link Layer
> CTS cases 4.3.2.1, 4.3.2.2, 4.3.2.3 and 4.3.2.4.
>
> Signed-off-by: Kuogee Hsieh <khsieh@...eaurora.org>
> ---

Any fixes tag?

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