From: swarren@wwwdotorg•org (Stephen Warren)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH v8 00/14] Tegra114 clockframework
Date: Mon, 25 Mar 2013 16:44:15 -0600 [thread overview]
Message-ID: <5150D33F.1000206@wwwdotorg.org> (raw)
In-Reply-To: <514CAB71.7020005@wwwdotorg.org>
On 03/22/2013 01:05 PM, Stephen Warren wrote:
> On 03/22/2013 06:39 AM, Peter De Schrijver wrote:
>> This is the eight version of the Tegra114 clockframework. It is based on the
>> next-20130320-fixed branch of
>> git://nv-tegra.nvidia.com/user/swarren/linux-2.6.git,
>
> Hmmm. Basing this on v3.9-rcX would be better, since when I apply it to
> the Tegra tree, that's what it will be based on. Luckily, it applies
> there with trivial conflicts.
>
>> http://patchwork.ozlabs.org/patch/229972/ and
>> http://patchwork.ozlabs.org/patch/229978/
>
> The series,
>
> Tested-by: Stephen Warren <swarren@nvidia•com>
>
> (based on my personal next-20130318-fixed branch, without
> http://patchwork.ozlabs.org/patch/229972/ applied, but instead with the
> audio clocks initialized per the patch I posted yesterday to do this).
>
> I tested: serial console, eMMC for the root filesystem, audio playback
> using different pll_a rates, reboot, and shutdown.
>
> This version also solves the hard hang I was seeing with V7 during
> shutdown or reboot. Now I don't have to rely on my filesystem journal:-)
Hmm. I retract that Tested-by now.
If I apply the series on top of Tegra's for-next branch (which is
currently entirely based on v3.9-rc1) then it works fine. (Similarly, it
works fine on top of next-20130318, as I reported above).
If I merge in v3.9-rc3, it's still fine. If I merge in v3.9-rc4, I see a
hard hang during boot. I believe that "hard hang" here means that some
module's registers are being touched with the clock turned off, which
locks up the CPU/bus. Certainly, sysrq doesn't work once it's hung.
I tracked this down to some interaction with commit f7db706 "ARM:
7674/1: smp: Avoid dummy clockevent being preferred over real hardware
clock-event". So says a "git bisect" between v3.9-rc3 and v3.9-rc4,
applying this CCF V8 series at each point.
If I revert that commit, the problem is solved/hidden. I tested this in
my local dev branch that's based on next-20130325 plus this CCF V8
series, plus a bunch of other cruft.
Can you please investigate what the problem is? Thanks.
prev parent reply other threads:[~2013-03-25 22:44 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-22 12:39 [PATCH v8 00/14] Tegra114 clockframework Peter De Schrijver
2013-03-22 12:39 ` [PATCH v8 01/14] clk: tegra: provide dummy cpu car ops Peter De Schrijver
2013-03-22 12:39 ` [PATCH v8 02/14] clk: tegra: Refactor PLL programming code Peter De Schrijver
2013-03-22 12:39 ` [PATCH v8 03/14] clk: tegra: Add TEGRA_PLL_BYPASS flag Peter De Schrijver
2013-03-22 12:39 ` [PATCH v8 04/14] clk: tegra: introduce TEGRA_PLL_HAS_LOCK_ENABLE Peter De Schrijver
2013-03-22 12:39 ` [PATCH v8 05/14] clk: tegra: Add PLL post divider table Peter De Schrijver
2013-03-22 12:39 ` [PATCH v8 06/14] clk: tegra: move from a lock bit idx to a lock mask Peter De Schrijver
2013-03-22 12:39 ` [PATCH v8 07/14] clk: tegra: Add new fields and PLL types for Tegra114 Peter De Schrijver
2013-03-22 12:39 ` [PATCH v8 08/14] clk: tegra: Add flags to tegra_clk_periph() Peter De Schrijver
2013-03-22 12:39 ` [PATCH v8 09/14] clk: tegra: Workaround for Tegra114 MSENC problem Peter De Schrijver
2013-03-22 12:39 ` [PATCH v8 10/14] ARM: tegra: Define Tegra114 CAR binding Peter De Schrijver
2013-03-25 11:15 ` Prashant Gaikwad
2013-04-03 14:19 ` Peter De Schrijver
2013-04-04 7:14 ` Prashant Gaikwad
2013-03-22 12:39 ` [PATCH v8 11/14] clk: tegra: Implement clocks for Tegra114 Peter De Schrijver
2013-03-22 12:39 ` [PATCH v8 12/14] clk: tegra: devicetree match for nvidia, tegra114-car Peter De Schrijver
2013-03-22 12:39 ` [PATCH v8 13/14] ARM: dt: Add references to tegra_car clocks Peter De Schrijver
2013-03-22 12:39 ` [PATCH v8 14/14] clk: tegra: Remove forced clk_enable of uartd Peter De Schrijver
2013-03-22 12:55 ` [PATCH v8 00/14] Tegra114 clockframework Peter De Schrijver
2013-03-22 19:05 ` Stephen Warren
2013-03-25 22:44 ` Stephen Warren [this message]
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