linux-kernel - Re: [PATCH v2] arm64: dts: qcom: qcs6490-rb3gen2: enable hdmi bridge

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Date: Tue, 28 May 2024 19:41:13 +0530
From: Prahlad Valluru <quic_vvalluru@...cinc.com>
To: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
CC: "Rob Herring (Arm)" <robh@...nel.org>,
        Bjorn Andersson
	<andersson@...nel.org>,
        <linux-kernel@...r.kernel.org>, <quic_nankam@...cinc.com>,
        <linux-arm-msm@...r.kernel.org>, <quic_abhinavk@...cinc.com>,
        <konrad.dybcio@...aro.org>, <conor+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <devicetree@...r.kernel.org>
Subject: Re: [PATCH v2] arm64: dts: qcom: qcs6490-rb3gen2: enable hdmi bridge

On Wed, May 15, 2024 at 05:28:24PM +0200, Dmitry Baryshkov wrote:
> On Wed, 15 May 2024 at 17:05, Prahlad Valluru <quic_vvalluru@...cinc.com> wrote:
> >
> > On Wed, May 08, 2024 at 09:31:24AM -0500, Rob Herring (Arm) wrote:
> > >
> > > On Mon, 06 May 2024 18:14:10 -0500, Bjorn Andersson wrote:
> > > > On Fri, Apr 26, 2024 at 07:54:42PM GMT, Prahlad Valluru wrote:
> > > > > From: Venkata Prahlad Valluru <quic_vvalluru@...cinc.com>
> > > > >
> > > >
> > > > Please don't thread new versions off existing version. b4 helps you with
> > > > getting these things right, please check go/upstream for more details.
> > > >
> > > > > Enable lt9611uxc bridge for qcs6490 rb3 gen2 platform.
> > > > >
> > > >
> > > > Even if it's clear what this is, I would prefer if you described the
> > > > hardware a little bit in your commit message.
> > > > "Rb3Gen2 has a HDMI connector, connected to DSI via a LT on i2cX.... reset and
> > > > irq pins comes from x and y. Describe this."
> > > >
> > > > > Signed-off-by: Prahlad Valluru <quic_vvalluru@...cinc.com>
> > > > > ---
> > > > > v2: Addressed dtschema errors
> > > > >   - Fixed lt9611-irq
> > > > >   - vdd-supply error to be ignored, as it is connected to
> > > > >     input supply directly, on rb3gen2
> > >
> > > The choice is either fix the dts or fix the binding.
> >
> > vdd-supply is mandatory for lt9611. Only in case of rb3gen2, we are seeing this
> > error, since it is connected to supply directly. Will add dummy vreg to address this.
> 
> s/add dummy vreg/describe fixed hardware register/
True, will define a fixed regulator for vdd.
> 
> 
> -- 
> With best wishes
> Dmitry