From: m.szyprowski@samsung•com (Marek Szyprowski)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH V2 0/2] Sound support for Exynos4412 Odroid X2, U3 board
Date: Tue, 24 Jun 2014 11:02:01 +0200 [thread overview]
Message-ID: <53A93E89.2030901@samsung.com> (raw)
In-Reply-To: <CAD8Lp46gqbV9gDfrH2hbVnF7s6wK6ASBdsX7vn0L0CFAHXSemg@mail.gmail.com>
Hello,
On 2014-06-24 10:35, Daniel Drake wrote:
> On Mon, Jun 23, 2014 at 5:32 PM, Sylwester Nawrocki
> <s.nawrocki@samsung•com> wrote:
>> I could reproduce such behaviour on the U3 board, but only with u-boot
>> which sets the MPLL clock frequency (fout_mpll) to 880 MHz, rather
>> than 800 MHz, which was the case in my original environment.
>> All fout_mpll child clocks have then different frequency values
>> in both cases.
>> It's a bit strange though, because frequencies of all the audio
>> subsystem clocks seem to be same anyway:
> I'm using the standard uboot from hardkernel.
>
>> # cat /sys/kernel/debug/clk/clk_summary
> This command makes the kernel totally hang, weird.
This is known issue with clocks vs. ISP power domain. We should really
fix this in exynos4 clock driver.
> # speaker-test -c 2 -t wav -l 2 -p 1024
>
> This plays back fine.
>
> Could it be a problem with the samsung-i2s driver, not correctly
> flushing at the right times?
> Or do you think the problem is more likely to be clock-related?
Hard to say right now, but at least we need to test a bit more our
solutions with different initial clocks configuration.
Best regards
--
Marek Szyprowski, PhD
Samsung R&D Institute Poland
prev parent reply other threads:[~2014-06-24 9:02 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-06-18 16:22 [PATCH V2 0/2] Sound support for Exynos4412 Odroid X2, U3 board Sylwester Nawrocki
2014-06-18 16:22 ` [PATCH V2 1/2] ASoC: samsung: Add machine driver for Odroid X2/U3 Sylwester Nawrocki
2014-06-25 3:31 ` [alsa-devel] " Tushar Behera
2014-06-26 8:47 ` Sylwester Nawrocki
2014-06-30 18:46 ` Mark Brown
2014-07-14 11:27 ` Sylwester Nawrocki
2014-07-14 11:31 ` Mark Brown
2014-06-18 16:22 ` [PATCH V2 2/2] doc: dt bindings: Document Odroid X2/U3 audio subsystem bindings Sylwester Nawrocki
2014-06-23 9:40 ` [PATCH V2 0/2] Sound support for Exynos4412 Odroid X2, U3 board Daniel Drake
2014-06-23 16:32 ` Sylwester Nawrocki
2014-06-23 16:53 ` Sylwester Nawrocki
2014-06-24 8:35 ` Daniel Drake
2014-06-24 9:02 ` Marek Szyprowski [this message]
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