| Message ID | 20240904-msm8939-rpm-apcs-fix-v1-1-b608e7e48fe1@linaro.org (mailing list archive) |
|---|---|
| State | Accepted |
| Commit | d92e9ea2f0f918d7b01cbacb838288bffccc8954 |
| Headers | show |
| Series | arm64: dts: qcom: msm8939: revert use of APCS mbox for RPM | expand |
On 4.09.2024 8:26 PM, Fabien Parent wrote: > Commit 22e4e43484c4 ("arm64: dts: qcom: msm8939: Use mboxes > properties for APCS") broke the boot on msm8939 platforms. > > The issue comes from the SMD driver failing to request the mbox > channel because of circular dependencies: > 1. rpm -> apcs1_mbox -> rpmcc (RPM_SMD_XO_CLK_SRC) -> rpm. > 2. rpm -> apcs1_mbox -> gcc -> rpmcc (RPM_SMD_XO_CLK_SRC) -> rpm > 3. rpm -> apcs1_mbox -> apcs2 -> gcc -> rpmcc (RPM_SMD_XO_CLK_SRC) -> rpm > > To fix this issue let's switch back to using the deprecated > qcom,ipc property for the RPM node. > > Fixes: 22e4e43484c4 ("arm64: dts: qcom: msm8939: Use mboxes properties for APCS") > Signed-off-by: Fabien Parent <fabien.parent@linaro.org> > --- This is fine as a stopgap solution, Bjorn can we push it in -fixes? This platform is admittedly not of top importance.. but fixing this eventually would be nice #regzbot introduced: 22e4e43484c4 Konrad
On 5.09.2024 2:38 PM, Konrad Dybcio wrote: > On 4.09.2024 8:26 PM, Fabien Parent wrote: >> Commit 22e4e43484c4 ("arm64: dts: qcom: msm8939: Use mboxes >> properties for APCS") broke the boot on msm8939 platforms. >> >> The issue comes from the SMD driver failing to request the mbox >> channel because of circular dependencies: >> 1. rpm -> apcs1_mbox -> rpmcc (RPM_SMD_XO_CLK_SRC) -> rpm. >> 2. rpm -> apcs1_mbox -> gcc -> rpmcc (RPM_SMD_XO_CLK_SRC) -> rpm >> 3. rpm -> apcs1_mbox -> apcs2 -> gcc -> rpmcc (RPM_SMD_XO_CLK_SRC) -> rpm >> >> To fix this issue let's switch back to using the deprecated >> qcom,ipc property for the RPM node. >> >> Fixes: 22e4e43484c4 ("arm64: dts: qcom: msm8939: Use mboxes properties for APCS") >> Signed-off-by: Fabien Parent <fabien.parent@linaro.org> >> --- > > This is fine as a stopgap solution, Bjorn can we push it in -fixes? > > This platform is admittedly not of top importance.. but fixing this > eventually would be nice > > #regzbot introduced: 22e4e43484c4 Reviewed-by: Konrad Dybcio <konradybcio@kernel.org> Konrad
FWIW msm8226 has a similar problem but there it is enough to provide <&xo_board> instead of the equivalent &rpmcc reference to gcc, which is what was done in a recent patch for msm8226.dtsi. But in the end clk and mailbox drivers should probably be split so that this dependency cycle can be broken. But I haven't looked into this further yet. Regards Luca Konrad Dybcio <konradybcio@kernel.org> schreef op 5 september 2024 14:38:53 CEST: >On 4.09.2024 8:26 PM, Fabien Parent wrote: >> Commit 22e4e43484c4 ("arm64: dts: qcom: msm8939: Use mboxes >> properties for APCS") broke the boot on msm8939 platforms. >> >> The issue comes from the SMD driver failing to request the mbox >> channel because of circular dependencies: >> 1. rpm -> apcs1_mbox -> rpmcc (RPM_SMD_XO_CLK_SRC) -> rpm. >> 2. rpm -> apcs1_mbox -> gcc -> rpmcc (RPM_SMD_XO_CLK_SRC) -> rpm >> 3. rpm -> apcs1_mbox -> apcs2 -> gcc -> rpmcc (RPM_SMD_XO_CLK_SRC) -> rpm >> >> To fix this issue let's switch back to using the deprecated >> qcom,ipc property for the RPM node. >> >> Fixes: 22e4e43484c4 ("arm64: dts: qcom: msm8939: Use mboxes properties for APCS") >> Signed-off-by: Fabien Parent <fabien.parent@linaro.org> >> --- > >This is fine as a stopgap solution, Bjorn can we push it in -fixes? > >This platform is admittedly not of top importance.. but fixing this >eventually would be nice > >#regzbot introduced: 22e4e43484c4 > >Konrad
diff --git a/arch/arm64/boot/dts/qcom/msm8939.dtsi b/arch/arm64/boot/dts/qcom/msm8939.dtsi index 46d9480cd464..39405713329b 100644 --- a/arch/arm64/boot/dts/qcom/msm8939.dtsi +++ b/arch/arm64/boot/dts/qcom/msm8939.dtsi @@ -248,7 +248,7 @@ rpm: remoteproc { smd-edge { interrupts = <GIC_SPI 168 IRQ_TYPE_EDGE_RISING>; - mboxes = <&apcs1_mbox 0>; + qcom,ipc = <&apcs1_mbox 8 0>; qcom,smd-edge = <15>; rpm_requests: rpm-requests {
Commit 22e4e43484c4 ("arm64: dts: qcom: msm8939: Use mboxes properties for APCS") broke the boot on msm8939 platforms. The issue comes from the SMD driver failing to request the mbox channel because of circular dependencies: 1. rpm -> apcs1_mbox -> rpmcc (RPM_SMD_XO_CLK_SRC) -> rpm. 2. rpm -> apcs1_mbox -> gcc -> rpmcc (RPM_SMD_XO_CLK_SRC) -> rpm 3. rpm -> apcs1_mbox -> apcs2 -> gcc -> rpmcc (RPM_SMD_XO_CLK_SRC) -> rpm To fix this issue let's switch back to using the deprecated qcom,ipc property for the RPM node. Fixes: 22e4e43484c4 ("arm64: dts: qcom: msm8939: Use mboxes properties for APCS") Signed-off-by: Fabien Parent <fabien.parent@linaro.org> --- arch/arm64/boot/dts/qcom/msm8939.dtsi | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- base-commit: d8abb73f584772eaafa95a447c90f1c02dba0dec change-id: 20240903-msm8939-rpm-apcs-fix-8924b8b7f593 Best regards,