linux-kernel - Re: [PATCH v16 0/3] eDP/DP Phy vdda realted function

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Message-ID: <Ytl7p1UHidn2yHfv@sirena.org.uk>
Date:   Thu, 21 Jul 2022 17:15:35 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Doug Anderson <dianders@...omium.org>
Cc:     Johan Hovold <johan@...nel.org>,
        Kuogee Hsieh <quic_khsieh@...cinc.com>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Vinod Koul <vkoul@...nel.org>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        Rob Clark <robdclark@...il.com>, Sean Paul <sean@...rly.run>,
        Stephen Boyd <swboyd@...omium.org>,
        Daniel Vetter <daniel@...ll.ch>,
        David Airlie <airlied@...ux.ie>,
        Andy Gross <agross@...nel.org>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        "Abhinav Kumar (QUIC)" <quic_abhinavk@...cinc.com>,
        "Aravind Venkateswaran (QUIC)" <quic_aravindh@...cinc.com>,
        Sankeerth Billakanti <quic_sbillaka@...cinc.com>,
        freedreno <freedreno@...ts.freedesktop.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Subject: Re: [PATCH v16 0/3] eDP/DP Phy vdda realted function

On Thu, Jul 21, 2022 at 07:52:01AM -0700, Doug Anderson wrote:
> On Thu, Jul 21, 2022 at 7:39 AM Doug Anderson <dianders@...omium.org> wrote:

> > vdda-phy-supply = <&vdda_mipi_dsi0_1p2>;
> > vdda-phy-supply-base-load = <21800>;

> Ah, sorry to respond to my own thread so quickly, but I just thought
> of a reason for the "matching properties" solution instead of the two
> cells. It would allow the SoC "dtsi" file to specify a base load while
> the board "dts" file can then specify the supply. That feels like it
> could be a nice solution.

For a per device thing it probably shouldn't be called a "base load",
it's just the load.  I would question how useful this would be, aside
from the concerns vendors will likely have with disclosing actual power
consumptions if the number never changes then it is immaterial which
device contributes which milliamp of load, you just want to configure a
fixed mode on the regulator and have done with it.

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