linux-kernel - Re: [PATCH v2 0/2] phy: qcom: edp: Allow eDP/DP configuring via set

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Message-ID: <ZYXZSBQrpRnGTgKI@linaro.org>
Date: Fri, 22 Dec 2023 20:45:28 +0200
From: Abel Vesa <abel.vesa@...aro.org>
To: Konrad Dybcio <konrad.dybcio@...aro.org>
Cc: Vinod Koul <vkoul@...nel.org>,
	Kishon Vijay Abraham I <kishon@...nel.org>,
	Bjorn Andersson <andersson@...nel.org>,
	Rob Herring <robh+dt@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
	Johan Hovold <johan@...nel.org>, linux-phy@...ts.infradead.org,
	linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
	devicetree@...r.kernel.org
Subject: Re: [PATCH v2 0/2] phy: qcom: edp: Allow eDP/DP configuring via
 set_mode op

On 23-12-22 16:02:56, Konrad Dybcio wrote:
> On 22.12.2023 14:01, Abel Vesa wrote:
> > Until now, all platform that supported both eDP and DP had different
> > compatibles for each mode. Using different compatibles for basically
> > the same IP block but for a different configuration is bad way all
> > around. There is a new compute platform from Qualcomm that supports
> > both eDP and DP with the same PHY. So instead of following the old
> > method, we should allow the mode to be configured via set_mode from
> > the controller driver.
> > 
> > The controller part will follow after we conclude the PHY part first.
> I got a bit lost between all the propositions, how are we going to
> discern the controller modes going forward?

Have a look here:
https://lore.kernel.org/all/CAA8EJpr8rKMBzcm-=HGu7-C5hPkNMrnG1cA78O00UjgJVT7p6Q@mail.gmail.com/

I currently implemented this locally, using the is-edp property.

Whatever property we will end up using for specifying the mode in the
controller mode, the set_mode op is still needed in the phy driver.

> 
> Konrad