linux-kernel - Re: [PATCH] arm64: dts: qcom: sdm850-yoga: Enable IPA

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Date:   Thu, 16 Sep 2021 07:58:38 -0700
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Amit Pundir <amit.pundir@...aro.org>
Cc:     Andy Gross <agross@...nel.org>, Rob Herring <robh+dt@...nel.org>,
        Alex Elder <elder@...aro.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        dt <devicetree@...r.kernel.org>,
        lkml <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] arm64: dts: qcom: sdm850-yoga: Enable IPA

On Thu 16 Sep 03:52 PDT 2021, Amit Pundir wrote:

> Hi Bjorn,
> 
> On Wed, 16 Jun 2021 at 04:58, Bjorn Andersson
> <bjorn.andersson@...aro.org> wrote:
> >
> > Shuffle memory regions to make firmware loading succeed and then enable
> > the ipa device.
> 
> Just a heads-up, this reserved memory region shuffling in sdm845.dtsi
> broke PocoF1 and may be other devices too(?) which do not override
> these regions.
> 

Thanks for the report!

> IIRC you once had a patch to move the reserved memory regions to board
> specific dts files, is it still on the cards so that we don't run into
> breakages like this?
> 

As you might remember the feedback I got was to not move the regions to
the individual devices and it was better to just deal with the problem
this way...

But apparently I was too optimistic and should have played the usual
game of deleting the inherited nodes and made the changes in the yoga
dts...

> Meanwhile I'll go and add these regions in sdm845-xiaomi-beryllium.dts.
> 

Let's prepare a fix that moves this change into the yoga.dts and get
that landed asap.

Regards,
Bjorn

> Regards,
> Amit Pundir
> 
> 
> 
> >
> > Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
> > ---
> >  arch/arm64/boot/dts/qcom/sdm845.dtsi          | 21 +++++++------------
> >  .../boot/dts/qcom/sdm850-lenovo-yoga-c630.dts |  5 +++++
> >  2 files changed, 13 insertions(+), 13 deletions(-)
> >
> > diff --git a/arch/arm64/boot/dts/qcom/sdm845.dtsi b/arch/arm64/boot/dts/qcom/sdm845.dtsi
> > index 1796ae8372be..49624eadce84 100644
> > --- a/arch/arm64/boot/dts/qcom/sdm845.dtsi
> > +++ b/arch/arm64/boot/dts/qcom/sdm845.dtsi
> > @@ -128,28 +128,23 @@ camera_mem: memory@...00000 {
> >                         no-map;
> >                 };
> >
> > -               ipa_fw_mem: memory@...00000 {
> > -                       reg = <0 0x8c400000 0 0x10000>;
> > +               wlan_msa_mem: memory@...00000 {
> > +                       reg = <0 0x8c400000 0 0x100000>;
> >                         no-map;
> >                 };
> >
> > -               ipa_gsi_mem: memory@...10000 {
> > -                       reg = <0 0x8c410000 0 0x5000>;
> > +               gpu_mem: memory@...15000 {
> > +                       reg = <0 0x8c515000 0 0x2000>;
> >                         no-map;
> >                 };
> >
> > -               gpu_mem: memory@...15000 {
> > -                       reg = <0 0x8c415000 0 0x2000>;
> > +               ipa_fw_mem: memory@...17000 {
> > +                       reg = <0 0x8c517000 0 0x5a000>;
> >                         no-map;
> >                 };
> >
> > -               adsp_mem: memory@...00000 {
> > -                       reg = <0 0x8c500000 0 0x1a00000>;
> > -                       no-map;
> > -               };
> > -
> > -               wlan_msa_mem: memory@...00000 {
> > -                       reg = <0 0x8df00000 0 0x100000>;
> > +               adsp_mem: memory@...00000 {
> > +                       reg = <0 0x8c600000 0 0x1a00000>;
> >                         no-map;
> >                 };
> >
> > diff --git a/arch/arm64/boot/dts/qcom/sdm850-lenovo-yoga-c630.dts b/arch/arm64/boot/dts/qcom/sdm850-lenovo-yoga-c630.dts
> > index c2a709a384e9..3eaa42dc3794 100644
> > --- a/arch/arm64/boot/dts/qcom/sdm850-lenovo-yoga-c630.dts
> > +++ b/arch/arm64/boot/dts/qcom/sdm850-lenovo-yoga-c630.dts
> > @@ -415,6 +415,11 @@ ecsh: hid@5c {
> >         };
> >  };
> >
> > +&ipa {
> > +       status = "okay";
> > +       memory-region = <&ipa_fw_mem>;
> > +};
> > +
> >  &mdss {
> >         status = "okay";
> >  };
> > --
> > 2.31.0
> >