From: Kamil Konieczny <k.konieczny@samsung.com>
To: Krzysztof Kozlowski <krzk@kernel.org>,
Chanwoo Choi <cw00.choi@samsung.com>,
MyungJoo Ham <myungjoo.ham@samsung.com>,
Kamil Konieczny <k.konieczny@partner.samsung.com>,
Marek Szyprowski <m.szyprowski@samsung.com>,
linux-pm@vger.kernel.org, linux-samsung-soc@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: Re: Devfreq looks for unsupported frequencies on Exynos
Date: Fri, 4 Oct 2019 14:46:43 +0200 [thread overview]
Message-ID: <e68cb899-b207-a674-e7b0-fa5f8cbb6a1b@samsung.com> (raw)
In-Reply-To: <20191004103101.GA9176@pi3>
On 04.10.2019 12:31, Krzysztof Kozlowski wrote:
>
> Hi All,
>
> I noticed recently error logs when booting Odroid HC1 (Exynos5422) on
> exynos_defconfig, 5.4.0-rc1-next-20191004:
> [...]
> [ 5.225222] exynos-bus soc:bus_wcore: dev_pm_opp_set_rate: failed to find current OPP for freq 532000000 (-34)
> [ 5.225975] exynos-bus: new bus device registered: soc:bus_peri ( 67000 KHz ~ 67000 KHz)
> [ 5.238824] exynos-bus soc:bus_noc: dev_pm_opp_set_rate: failed to find current OPP for freq 111000000 (-34)
> [ 5.245719] exynos-bus: new bus device registered: soc:bus_g2d ( 84000 KHz ~ 333000 KHz)
> [ 5.252653] exynos-bus soc:bus_fsys_apb: dev_pm_opp_set_rate: failed to find current OPP for freq 222000000 (-34)
> [...]
> You can see that Exynos devfreq was trying to set 532000000 Hz for
> wcore, 111000000 for noc and 222000000 for fsys_apb. These are higher
> frequencies than we have in DTSI.
>
> Any ideas why? It does not look normal...
Thank you for report. This is known issue, clocks left by u-boot are too
high and they are not present in opp tables. Lukasz Luba sended patchset
"[PATCH v1 00/50] Exynos5x clocks and buses changes" but it should first
be made in u-boot.
I have idea for a fix and will send it soon after weekend.
--
Best regards,
Kamil Konieczny
Samsung R&D Institute Poland
prev parent reply other threads:[~2019-10-04 12:46 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20191004103109epcas5p23221e4098d5d62faaf5d8db871ac3770@epcas5p2.samsung.com>
2019-10-04 10:31 ` Devfreq looks for unsupported frequencies on Exynos Krzysztof Kozlowski
2019-10-04 12:46 ` Kamil Konieczny [this message]
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