* [PATCH] arm64: dts: msm8916: Properly deal with ETMv4 power management
@ 2020-02-11 18:30 Mathieu Poirier
2020-02-14 5:31 ` Bjorn Andersson
0 siblings, 1 reply; 2+ messages in thread
From: Mathieu Poirier @ 2020-02-11 18:30 UTC (permalink / raw)
To: agross, bjorn.andersson; +Cc: linux-arm-msm, linux-kernel
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@linaro.org>
---
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
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] arm64: dts: msm8916: Properly deal with ETMv4 power management
2020-02-11 18:30 [PATCH] arm64: dts: msm8916: Properly deal with ETMv4 power management Mathieu Poirier
@ 2020-02-14 5:31 ` Bjorn Andersson
0 siblings, 0 replies; 2+ messages in thread
From: Bjorn Andersson @ 2020-02-14 5:31 UTC (permalink / raw)
To: Mathieu Poirier; +Cc: agross, linux-arm-msm, linux-kernel
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@linaro.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
>
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