From: Kevin Hilman <khilman@linaro.org> To: Chander Kashyap <k.chander@samsung.com> Cc: "Lukasz Majewski" <l.majewski@samsung.com>, "Kukjin Kim" <kgene.kim@samsung.com>, "Mike Turquette" <mturquette@linaro.org>, "Heiko Stübner" <heiko@sntech.de>, "linux-pm@vger.kernel.org" <linux-pm@vger.kernel.org>, "Viresh Kumar" <viresh.kumar@linaro.org>, "Bartlomiej Zolnierkiewicz" <b.zolnierkie@samsung.com>, "Tomasz Figa" <tomasz.figa@gmail.com>, "Amit Kucheria" <amit.kucheria@linaro.org>, "Chanwoo Choi" <cw00.choi@samsung.com>, "Thomas Abraham" <thomas.ab@samsung.com>, "linux-arm-kernel@lists.infradead.org" <linux-arm-kernel@lists.infradead.org>, "linaro-kernel@lists.linaro.org" <linaro-kernel@lists.linaro.org>, "linux-samsung-soc@vger.kernel.org" <linux-samsung-soc@vger.kernel.org>, "Marek Szyprowski" <m.szyprowski@samsung.com> Subject: Re: [PATCH v9 4/6] ARM: Exynos: switch to using generic cpufreq driver for Exynos4210/5250/5420 Date: Tue, 26 Aug 2014 15:25:48 -0700 [thread overview] Message-ID: <CAGa+x86jU8MR=r_xuaiorbNNyqrezb0b6Ozy-MPg9HvsARESOw@mail.gmail.com> (raw) In-Reply-To: <CAGa+x85-Anb+HsSUQRaaeex19-HK+yZDW0UpFBwAtsQ8Sf2Aqg@mail.gmail.com> On Tue, Aug 26, 2014 at 8:15 AM, Kevin Hilman <khilman@linaro.org> wrote: > On Mon, Aug 25, 2014 at 10:25 PM, Chander Kashyap <k.chander@samsung.com> wrote: [...] >>> >>> Can you clarify how you're setting the voltages to ensure stability? >> >> below is the diff : wip/exynos/integ > > Thanks. > > I've applied your patch, and bootup shows vdd_arm and vdd_kfc at > 1500mV, but still when booting with cpuidle enabled (bL switcher > disabled), I'm seeing lockups with no kernel output. With CPUidle > disabled, things are pretty stable. > > What tree are you using to test this out on 5420? I'm using mainline > v3.17-rc1 + DT patch for CPUidle and this cpufreq series. See my > wip/exynos/integ branch at > git://git.kernel.org/pub/scm/linux/kernel/git/khilman/linux.git. I mis-stated this. Actually my tree is based on the v3.17-rc1 branch of the exynos-reference tree[1] + the above mentioned patches for cpuidle and cpufreq. Also, I've narrowed down the instability a bit, and it's not related to CPUidle. I can now trigger a boot hang even without CPUidle enabled. Here's a quick way to cause a boot lockup. With the switcher disabled, I enable CPUfreq and set the default governor to performance. As soon as cpufreq driver loads, it tries to use the top frequences for both clusters, and it hangs. Selectively disabling frequencies, I narrowed it down to the 1.3GHz and 1.2GHz frequencies of the little cluster. With these commented out in the DT, it will fully boot with the performance governor enabled. So that leads to the question. Are all of the operating points in exynos5420.dtsi valid for exynos5800, and have they been validated? Kevin [1]https://github.com/exynos-reference/kernel.git
WARNING: multiple messages have this Message-ID (diff)
From: khilman@linaro.org (Kevin Hilman) To: linux-arm-kernel@lists.infradead.org Subject: [PATCH v9 4/6] ARM: Exynos: switch to using generic cpufreq driver for Exynos4210/5250/5420 Date: Tue, 26 Aug 2014 15:25:48 -0700 [thread overview] Message-ID: <CAGa+x86jU8MR=r_xuaiorbNNyqrezb0b6Ozy-MPg9HvsARESOw@mail.gmail.com> (raw) In-Reply-To: <CAGa+x85-Anb+HsSUQRaaeex19-HK+yZDW0UpFBwAtsQ8Sf2Aqg@mail.gmail.com> On Tue, Aug 26, 2014 at 8:15 AM, Kevin Hilman <khilman@linaro.org> wrote: > On Mon, Aug 25, 2014 at 10:25 PM, Chander Kashyap <k.chander@samsung.com> wrote: [...] >>> >>> Can you clarify how you're setting the voltages to ensure stability? >> >> below is the diff : wip/exynos/integ > > Thanks. > > I've applied your patch, and bootup shows vdd_arm and vdd_kfc at > 1500mV, but still when booting with cpuidle enabled (bL switcher > disabled), I'm seeing lockups with no kernel output. With CPUidle > disabled, things are pretty stable. > > What tree are you using to test this out on 5420? I'm using mainline > v3.17-rc1 + DT patch for CPUidle and this cpufreq series. See my > wip/exynos/integ branch at > git://git.kernel.org/pub/scm/linux/kernel/git/khilman/linux.git. I mis-stated this. Actually my tree is based on the v3.17-rc1 branch of the exynos-reference tree[1] + the above mentioned patches for cpuidle and cpufreq. Also, I've narrowed down the instability a bit, and it's not related to CPUidle. I can now trigger a boot hang even without CPUidle enabled. Here's a quick way to cause a boot lockup. With the switcher disabled, I enable CPUfreq and set the default governor to performance. As soon as cpufreq driver loads, it tries to use the top frequences for both clusters, and it hangs. Selectively disabling frequencies, I narrowed it down to the 1.3GHz and 1.2GHz frequencies of the little cluster. With these commented out in the DT, it will fully boot with the performance governor enabled. So that leads to the question. Are all of the operating points in exynos5420.dtsi valid for exynos5800, and have they been validated? Kevin [1]https://github.com/exynos-reference/kernel.git
next prev parent reply other threads:[~2014-08-26 22:25 UTC|newest] Thread overview: 121+ messages / expand[flat|nested] mbox.gz Atom feed top 2014-07-30 8:07 [PATCH v9 0/6] cpufreq: use generic cpufreq drivers for exynos platforms Thomas Abraham 2014-07-30 8:07 ` Thomas Abraham 2014-07-30 8:07 ` [PATCH v9 1/6] clk: samsung: add infrastructure to register cpu clocks Thomas Abraham 2014-07-30 8:07 ` Thomas Abraham 2014-09-01 22:29 ` Mike Turquette 2014-09-01 22:29 ` Mike Turquette 2014-09-02 13:53 ` Thomas Abraham 2014-09-02 13:53 ` Thomas Abraham 2014-07-30 8:07 ` [PATCH v9 2/6] clk: samsung: add cpu clock configuration data and instantiate cpu clock Thomas Abraham 2014-07-30 8:07 ` Thomas Abraham 2014-09-01 22:29 ` Mike Turquette 2014-09-01 22:29 ` Mike Turquette 2014-07-30 8:07 ` [PATCH v9 3/6] ARM: dts: Exynos: add CPU OPP and regulator supply property Thomas Abraham 2014-07-30 8:07 ` Thomas Abraham 2014-07-30 11:28 ` Andreas Färber 2014-07-30 11:28 ` Andreas Färber 2014-07-31 2:55 ` Thomas Abraham 2014-07-31 2:55 ` Thomas Abraham 2014-07-31 0:37 ` Doug Anderson 2014-07-31 0:37 ` Doug Anderson 2014-07-31 3:21 ` Thomas Abraham 2014-07-31 3:21 ` Thomas Abraham 2014-07-31 3:53 ` Doug Anderson 2014-07-31 3:53 ` Doug Anderson 2014-07-31 4:06 ` Thomas Abraham 2014-07-31 4:06 ` Thomas Abraham 2014-07-31 4:08 ` Doug Anderson 2014-07-31 4:08 ` Doug Anderson 2014-07-31 4:18 ` Thomas Abraham 2014-07-31 4:18 ` Thomas Abraham 2014-08-02 3:49 ` Javier Martinez Canillas 2014-08-02 3:49 ` Javier Martinez Canillas 2014-08-04 3:00 ` Thomas Abraham 2014-08-04 3:00 ` Thomas Abraham 2014-07-30 8:07 ` [PATCH v9 4/6] ARM: Exynos: switch to using generic cpufreq driver for Exynos4210/5250/5420 Thomas Abraham 2014-07-30 8:07 ` Thomas Abraham 2014-07-31 18:32 ` Kukjin Kim 2014-07-31 18:32 ` Kukjin Kim 2014-07-31 18:40 ` Tomasz Figa 2014-07-31 18:40 ` Tomasz Figa 2014-07-31 18:54 ` Tomasz Figa 2014-07-31 18:54 ` Tomasz Figa 2014-07-31 19:25 ` Thomas Abraham 2014-07-31 19:25 ` Thomas Abraham 2014-07-31 19:30 ` Tomasz Figa 2014-07-31 19:30 ` Tomasz Figa 2014-08-04 3:24 ` Thomas Abraham 2014-08-04 3:24 ` Thomas Abraham 2014-08-22 23:54 ` Kevin Hilman 2014-08-22 23:54 ` Kevin Hilman 2014-08-23 0:02 ` Tomasz Figa 2014-08-23 0:02 ` Tomasz Figa 2014-08-25 6:53 ` Lukasz Majewski 2014-08-25 6:53 ` Lukasz Majewski 2014-08-25 12:15 ` Chander Kashyap 2014-08-25 12:15 ` Chander Kashyap 2014-08-25 15:32 ` Kevin Hilman 2014-08-25 15:32 ` Kevin Hilman 2014-08-25 15:56 ` Tomasz Figa 2014-08-25 15:56 ` Tomasz Figa 2014-08-26 4:54 ` Viresh Kumar 2014-08-26 4:54 ` Viresh Kumar 2014-08-26 5:25 ` Chander Kashyap 2014-08-26 5:25 ` Chander Kashyap 2014-08-26 15:15 ` Kevin Hilman 2014-08-26 15:15 ` Kevin Hilman 2014-08-26 22:25 ` Kevin Hilman [this message] 2014-08-26 22:25 ` Kevin Hilman 2014-08-29 12:52 ` Thomas Abraham 2014-08-29 12:52 ` Thomas Abraham 2014-08-29 15:03 ` Kevin Hilman 2014-08-29 15:03 ` Kevin Hilman 2014-09-01 8:47 ` Thomas Abraham 2014-09-01 8:47 ` Thomas Abraham 2014-09-02 19:32 ` Kevin Hilman 2014-09-02 19:32 ` Kevin Hilman 2014-09-03 4:26 ` Thomas Abraham 2014-09-03 4:26 ` Thomas Abraham 2014-09-03 13:18 ` Thomas Abraham 2014-09-03 13:18 ` Thomas Abraham 2014-09-03 23:15 ` Kevin Hilman 2014-09-03 23:15 ` Kevin Hilman 2014-09-04 10:22 ` Thomas Abraham 2014-09-04 13:30 ` Kevin Hilman 2014-09-04 13:30 ` Kevin Hilman 2014-09-05 13:41 ` Thomas Abraham 2014-09-05 13:41 ` Thomas Abraham 2014-08-25 8:11 ` Sjoerd Simons 2014-08-25 8:11 ` Sjoerd Simons 2014-07-30 8:07 ` [PATCH v9 5/6] cpufreq: exynos: remove exynos4210/5250 specific cpufreq driver support Thomas Abraham 2014-07-30 8:07 ` Thomas Abraham 2014-07-30 8:07 ` [PATCH v9 6/6] clk: samsung: remove unused clock aliases and update clock flags Thomas Abraham 2014-07-30 8:07 ` Thomas Abraham 2014-07-31 14:13 ` Tomasz Figa 2014-07-31 14:13 ` Tomasz Figa 2014-07-31 18:24 ` Thomas Abraham 2014-07-31 18:24 ` Thomas Abraham 2014-07-31 18:35 ` Tomasz Figa 2014-07-31 18:35 ` Tomasz Figa 2014-07-31 18:41 ` Thomas Abraham 2014-07-31 18:41 ` Thomas Abraham 2014-07-31 18:46 ` Tomasz Figa 2014-07-31 18:46 ` Tomasz Figa 2014-07-31 18:49 ` Thomas Abraham 2014-07-31 18:49 ` Thomas Abraham 2014-09-01 22:31 ` Mike Turquette 2014-09-01 22:31 ` Mike Turquette 2014-07-31 6:20 ` [PATCH v9 0/6] cpufreq: use generic cpufreq drivers for exynos platforms Chander M. Kashyap 2014-07-31 6:20 ` Chander M. Kashyap 2014-07-31 10:59 ` Thomas Abraham 2014-07-31 10:59 ` Thomas Abraham 2014-07-31 12:24 ` Chander M. Kashyap 2014-07-31 12:24 ` Chander M. Kashyap 2014-07-31 14:15 ` Tomasz Figa 2014-07-31 14:15 ` Tomasz Figa 2014-07-31 18:25 ` Thomas Abraham 2014-07-31 18:25 ` Thomas Abraham 2014-07-31 18:34 ` Thomas Abraham 2014-07-31 18:34 ` Thomas Abraham 2014-08-01 9:42 ` Viresh Kumar 2014-08-01 9:42 ` Viresh Kumar
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