linux-kernel - Re: [PATCH] soc: qcom: pmic_glink: fix connector type to be DisplayPort

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Message-ID: <65f841ba-5b70-4cbe-98e0-3d53e5b7944c@linaro.org>
Date:   Wed, 25 Oct 2023 15:45:31 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Simon Ser <contact@...rsion.fr>, Johan Hovold <johan@...nel.org>
Cc:     Bjorn Andersson <andersson@...nel.org>,
        Andy Gross <agross@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        linux-arm-msm@...r.kernel.org, freedreno@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] soc: qcom: pmic_glink: fix connector type to be
 DisplayPort

On 25/10/2023 15:29, Simon Ser wrote:
> On Wednesday, October 25th, 2023 at 14:22, Johan Hovold <johan@...nel.org> wrote:
> 
>> I was just going to post a patch fixing this after finally investigating
>> why the DisplayPort outputs on the X13s were annoyingly identified as
>> "Unknown20-1" and "Unknown20-2" instead of the expected "DP-1" and
>> "DP-2".
> 
> Note, ideally userspace should use drmModeGetConnectorTypeName() from
> libdrm to figure out the proper name for a connector type. That way we
> only need to update a single spot when adding a new connector type,
> instead of patching a whole bunch of programs.

X11 does its own thing. It further "renames" DP MST connectors. So on my 
laptop I end up with DP-1-1 in xrandr, but DP-3 in kernel.

-- 
With best wishes
Dmitry