linux-kernel - Re: [PATCH v4 4/4] drm/bridge: it6505: skip auto training when previous try fail

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Message-ID: <w3t4mfsc2mnv2vu2sxnklntpto6bcbqu2spesagpowdwj2ih5o@k4jtdpafqhh6>
Date: Tue, 23 Sep 2025 12:04:41 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Hermes.wu@....com.tw
Cc: Andrzej Hajda <andrzej.hajda@...el.com>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Robert Foss <rfoss@...nel.org>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Jonas Karlman <jonas@...boo.se>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
        AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
        Allen Chen <allen.chen@....com.tw>, Pet.Weng@....com.tw,
        Kenneth.Hung@....com.tw, treapking@...omium.org,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 4/4] drm/bridge: it6505: skip auto training when
 previous try fail

On Tue, Sep 23, 2025 at 02:23:44PM +0800, Hermes Wu via B4 Relay wrote:
> From: Hermes Wu <Hermes.wu@....com.tw>
> 
> When connect to device that can only training done by step training,
> skip auto training when link training restart before unplug device.
> 
> The driver performs a full cycle of attempting auto link training and
> then manual link training on each modeset. Save time by skipping the
> auto training if it failed previously for this monitor
> 
> Signed-off-by: Hermes Wu <Hermes.wu@....com.tw>
> ---
>  drivers/gpu/drm/bridge/ite-it6505.c | 8 ++++++--
>  1 file changed, 6 insertions(+), 2 deletions(-)
> 

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>


-- 
With best wishes
Dmitry