linux-kernel - Re: [PATCH] drm/msm/dp: Correct LeMans/Monaco DP phy Swing/Emphasis setting

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Message-ID: <qnwvucdihyavgn5prchafmfly7mc4b5ts4h2wxjky2cbkv4t33@ct6zncecngvs>
Date: Fri, 9 Jan 2026 17:27:05 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Yongxing Mou <yongxing.mou@....qualcomm.com>
Cc: Vinod Koul <vkoul@...nel.org>, Neil Armstrong <neil.armstrong@...aro.org>,
        linux-arm-msm@...r.kernel.org, linux-phy@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm/msm/dp: Correct LeMans/Monaco DP phy Swing/Emphasis
 setting

On Fri, Jan 09, 2026 at 04:30:21PM +0800, Yongxing Mou wrote:
> Currently, the LeMans/Monaco DP PHY operates in DP mode rather than eDP
> mode. Per the PHY HPG, the Swing and Emphasis settings have been corrected

have been corrected... when?

> to the appropriate DP-mode values.
> 
> Additionally, the HPG specifies that the LDO value should be set to 0 when
> in DP mode. These misconfigurations can lead to link training failures on
> certain dongles.

Separate commit

> 
> Signed-off-by: Yongxing Mou <yongxing.mou@....qualcomm.com>

Missing Fixes, cc:stable

> ---
>  drivers/phy/qualcomm/phy-qcom-edp.c | 27 ++++++++++++++++++++++++---
>  1 file changed, 24 insertions(+), 3 deletions(-)
> 

-- 
With best wishes
Dmitry