linux-kernel - Re: [PATCH] arm64: dts: msm8916: Properly deal with ETMv4 power management

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Date:   Thu, 13 Feb 2020 21:31:33 -0800
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Mathieu Poirier <mathieu.poirier@...aro.org>
Cc:     agross@...nel.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arm64: dts: msm8916: Properly deal with ETMv4 power
 management

On Tue 11 Feb 10:30 PST 2020, Mathieu Poirier wrote:

> Properly deal with ETMv4 power management by adding the
> "coresight-loses-context-with-cpu" property.  Otherwise tracer
> configuration is lost when CPUs enter deep idle states, resulting
> in the failure of the trace session.
> 
> Signed-off-by: Mathieu Poirier <mathieu.poirier@...aro.org>

Applied

Thanks,
Bjorn

> ---
>  arch/arm64/boot/dts/qcom/msm8916.dtsi | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/msm8916.dtsi b/arch/arm64/boot/dts/qcom/msm8916.dtsi
> index 8686e101905c..846c5b4a53e8 100644
> --- a/arch/arm64/boot/dts/qcom/msm8916.dtsi
> +++ b/arch/arm64/boot/dts/qcom/msm8916.dtsi
> @@ -1363,6 +1363,7 @@
>  
>  			clocks = <&rpmcc RPM_QDSS_CLK>, <&rpmcc RPM_QDSS_A_CLK>;
>  			clock-names = "apb_pclk", "atclk";
> +			arm,coresight-loses-context-with-cpu;
>  
>  			cpu = <&CPU0>;
>  
> @@ -1381,6 +1382,7 @@
>  
>  			clocks = <&rpmcc RPM_QDSS_CLK>, <&rpmcc RPM_QDSS_A_CLK>;
>  			clock-names = "apb_pclk", "atclk";
> +			arm,coresight-loses-context-with-cpu;
>  
>  			cpu = <&CPU1>;
>  
> @@ -1399,6 +1401,7 @@
>  
>  			clocks = <&rpmcc RPM_QDSS_CLK>, <&rpmcc RPM_QDSS_A_CLK>;
>  			clock-names = "apb_pclk", "atclk";
> +			arm,coresight-loses-context-with-cpu;
>  
>  			cpu = <&CPU2>;
>  
> @@ -1417,6 +1420,7 @@
>  
>  			clocks = <&rpmcc RPM_QDSS_CLK>, <&rpmcc RPM_QDSS_A_CLK>;
>  			clock-names = "apb_pclk", "atclk";
> +			arm,coresight-loses-context-with-cpu;
>  
>  			cpu = <&CPU3>;
>  
> -- 
> 2.20.1
>