linux-kernel - Re: [PATCH v2] arm64: dts: qcom: Update iommu property for simultaneous playback

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Message-ID: <161825447608.3764895.10280020916196054814@swboyd.mtv.corp.google.com>
Date:   Mon, 12 Apr 2021 12:07:56 -0700
From:   Stephen Boyd <swboyd@...omium.org>
To:     Srinivasa Rao Mandadapu <srivasam@...eaurora.org>,
        agross@...nel.org, bjorn.andersson@...aro.org,
        devicetree@...r.kernel.org, dianders@...omium.org,
        judyhsiao@...omium.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org, robh+dt@...nel.org,
        rohitkr@...eaurora.org, srinivas.kandagatla@...aro.org
Cc:     V Sujith Kumar Reddy <vsujithk@...eaurora.org>
Subject: Re: [PATCH v2] arm64: dts: qcom: Update iommu property for simultaneous playback

Quoting Srinivasa Rao Mandadapu (2021-04-09 22:17:07)
> Hi Stephen.
> 
> Thanks for your time!!!
> 
> 
> On 4/9/2021 10:31 PM, Stephen Boyd wrote:
> > Quoting Srinivasa Rao Mandadapu (2021-04-06 09:33:30)
> >> From: V Sujith Kumar Reddy <vsujithk@...eaurora.org>
> >>
> >> Update iommu property in lpass cpu node for supporting
> >> simultaneous playback on headset and speaker.
> >>
> >> Signed-off-by: V Sujith Kumar Reddy <vsujithk@...eaurora.org>
> >> Signed-off-by: Srinivasa Rao Mandadapu <srivasam@...eaurora.org>
> >> ---
> >> Changes since v1:
> >>     -- Commit messge header change
> >>
> >>   arch/arm64/boot/dts/qcom/sc7180.dtsi | 3 ++-
> >>   1 file changed, 2 insertions(+), 1 deletion(-)
> >>
> >> diff --git a/arch/arm64/boot/dts/qcom/sc7180.dtsi b/arch/arm64/boot/dts/qcom/sc7180.dtsi
> >> index a6da78d31fdd..6228ba2d8513 100644
> >> --- a/arch/arm64/boot/dts/qcom/sc7180.dtsi
> >> +++ b/arch/arm64/boot/dts/qcom/sc7180.dtsi
> >> @@ -3566,7 +3566,8 @@ lpass_cpu: lpass@...00000 {
> >>                          reg = <0 0x62f00000 0 0x29000>;
> >>                          reg-names = "lpass-lpaif";
> >>   
> >> -                       iommus = <&apps_smmu 0x1020 0>;
> >> +                       iommus = <&apps_smmu 0x1020 0>,
> >> +                               <&apps_smmu 0x1021 0>;
> > The stream ID 0x1032 was also dropped in this version but there's no
> > mention of that in the changelog. Why?
> That is ID is for HDMI Stream, so as part of DP patches that will be added.

Ok, got it.