From: jbrunet@baylibre.com (Jerome Brunet)
To: linux-arm-kernel@lists.infradead.org
Subject: SCPI regressions in v4.15-rc1 on Amlogic SoCs.
Date: Fri, 01 Dec 2017 17:03:54 +0100 [thread overview]
Message-ID: <1512144234.12869.4.camel@baylibre.com> (raw)
In-Reply-To: <CAOi56cXCBAJO6iOONTENqGdm9kE+t4fGYgTENupzkRgHjJfykw@mail.gmail.com>
On Thu, 2017-11-30 at 16:21 -0800, Kevin Hilman wrote:
> Hi Sudeep,
>
> There's been a pretty major regression in v4.15-rc1 compared to v4.15
> in SCPI causing warning splats on amlogic SoCs when cpufreq starts up
> and tries to set the OPP for the first time[1].
>
> I ran out of time to narrow it down further since there have been
> quite a few changes since v4.14, but simply reverting
> drivers/firmware/arm_scpi.c to its v4.14 state gets things working
> again.
Same thing for me. One of my early libretech-cc gets completely stuck during
boot with v4.15-rc1
reverting drivers/firmware/arm_scpi.c to v4.14 fixes the problem.
On the u-art, we see traces that appear to be coming from the FW:
> domain-0 init dvfs: 4
My platform gets stuck on one of these traces with v4.15-rc1
>
> This has been happening for awhile, and we should've caught it sooner
> in kernelCI.org, however this warning splat still allows the kernel to
> finish booting, so it still resulted in a PASS for the boot test.
> That combined with the fact that we've been tracking some other
> regressions, we didn't notice it until now.
>
> Also, is this the expected result for the pre-1.0 firmware:
>
> scpi_protocol scpi: SCP Protocol 0.0 Firmware 0.0.0 version
>
> Kevin
>
> [1] Here are a few boot logs from v4.15-rc1 with the splat:
>
> https://storage.kernelci.org/mainline/master/v4.15-rc1/arm64/defconfig/lab-bay
> libre-seattle/boot-meson-gxl-s905x-khadas-vim.html
>
> https://storage.kernelci.org/mainline/master/v4.15-rc1/arm64/defconfig/lab-bay
> libre-seattle/boot-meson-gxbb-p200.html
>
> https://storage.kernelci.org/mainline/master/v4.15-rc1/arm64/defconfig/lab-bay
> libre-seattle/boot-meson-gxl-s905d-p230.html
>
> _______________________________________________
> linux-amlogic mailing list
> linux-amlogic at lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-amlogic
next prev parent reply other threads:[~2017-12-01 16:03 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-01 0:21 SCPI regressions in v4.15-rc1 on Amlogic SoCs Kevin Hilman
2017-12-01 7:08 ` Heiner Kallweit
2017-12-01 15:59 ` Kevin Hilman
2017-12-04 2:24 ` Sudeep Holla
2017-12-04 18:14 ` Kevin Hilman
2017-12-01 16:03 ` Jerome Brunet [this message]
2017-12-04 2:24 ` Sudeep Holla
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