linux-kernel - Re: [PATCH 01/12] drm/msm/dsi/phy: Add support for Kaanapali

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Message-ID: <einog245dsbqtx3by2cojyzmyctk2fffpwndwoe24puwqq4fta@cu6iiidxqgr4>
Date: Mon, 27 Oct 2025 15:14:40 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: yuanjiey <yuanjie.yang@....qualcomm.com>
Cc: Konrad Dybcio <konrad.dybcio@....qualcomm.com>,
        robin.clark@....qualcomm.com, lumag@...nel.org,
        abhinav.kumar@...ux.dev, sean@...rly.run,
        marijn.suijten@...ainline.org, airlied@...il.com, simona@...ll.ch,
        maarten.lankhorst@...ux.intel.com, mripard@...nel.org,
        tzimmermann@...e.de, robh@...nel.org, krzk+dt@...nel.org,
        conor+dt@...nel.org, quic_mkrishn@...cinc.com, jonathan@...ek.ca,
        quic_khsieh@...cinc.com, neil.armstrong@...aro.org,
        linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, tingwei.zhang@....qualcomm.com,
        aiqun.yu@....qualcomm.com, yongxing.mou@....qualcomm.com
Subject: Re: [PATCH 01/12] drm/msm/dsi/phy: Add support for Kaanapali

On Fri, Oct 24, 2025 at 11:27:53AM +0800, yuanjiey wrote:
> On Thu, Oct 23, 2025 at 02:02:45PM +0200, Konrad Dybcio wrote:
> > On 10/23/25 1:48 PM, Dmitry Baryshkov wrote:
> > > On Thu, Oct 23, 2025 at 03:53:50PM +0800, yuanjie yang wrote:
> > >> From: Yuanjie Yang <yuanjie.yang@....qualcomm.com>
> > >>
> > >> Add DSI PHY support for the Kaanapali platform.
> > >>
> > >> Signed-off-by: Yongxing Mou <yongxing.mou@....qualcomm.com>
> > >> Signed-off-by: Yuanjie Yang <yuanjie.yang@....qualcomm.com>
> > >> ---
> > 
> > [...]
> > 
> > >> +	.io_start = { 0x9ac1000, 0xae97000 },
> > > 
> > > These two addresses are very strange. Would you care to explain? Other
> > > than that there is no difference from SM8750 entry.
> > 
> > They're correct.
> > Although they correspond to DSI_0 and DSI_2..
> > 
> > Yuanjie, none of the DSI patches mention that v2.10.0 is packed with
> > new features. Please provide some more context and how that impacts
> > the hw description.
> 
> Thanks for your reminder.
> 
> Correct here:
> io_start = { 0x9ac1000, 0x9ac4000 }  DSI_Phy0 DSI_phy1
> 
> And v2.10.0 no clearly meaningful changes compared to v2.9.0.
> just some register address change.

Addition of DSI2 is a meaningful change, which needs to be handled both
in the core and in the DSI / DSI PHY drivers.

> 
> Thanks,
> Yuanjie
>  
> > Konrad

-- 
With best wishes
Dmitry