linux-kernel - Re: msm8996: qcom-qmp: apq8096-db820c fails to boot, reset back to fastboot and locks up

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Message-ID: <20190613085725.GA11403@harukaze>
Date:   Thu, 13 Jun 2019 10:57:25 +0200
From:   Paolo Pisati <p.pisati@...il.com>
To:     Niklas Cassel <niklas.cassel@...aro.org>
Cc:     Paolo Pisati <p.pisati@...il.com>,
        Vivek Gautam <vivek.gautam@...eaurora.org>,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: msm8996: qcom-qmp: apq8096-db820c fails to boot, reset back to
 fastboot and locks up

On Wed, Jun 12, 2019 at 06:20:48PM +0200, Niklas Cassel wrote:
> 
> Can you still reproduce the reboot?

--- a/arch/arm64/boot/dts/qcom/apq8096-db820c.dtsi
+++ b/arch/arm64/boot/dts/qcom/apq8096-db820c.dtsi
@@ -447,12 +447,12 @@
                        };
 
                        pcie@...000 {
-                               status = "okay";
+                               status = "disabled";
                                perst-gpio = <&msmgpio 130 GPIO_ACTIVE_LOW>;
                        };
 
                        pcie@...000 {
-                               status = "okay";
+                               status = "disabled";
                                perst-gpio = <&msmgpio 114 GPIO_ACTIVE_LOW>;
                        };
                };

disabling the two other pci controllers (and leaving your previous patch
applied), made the issue more frequent: i was never able to boot to user space
three times in a row without experiencing a crash, previously it was more
sporadic.

On the other hand, now i can reproduce the issue more easily this way.
-- 
bye,
p.