Re: Audio support on Mini6410 board

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Hi,

On Sat, Jan 12, 2013 at 9:07 PM, Alexander Nestorov
<alexandernst@xxxxxxxxx> wrote:
> Hi,
>
> it's finally working! :)
>
> This is my entire diff: http://pastie.org/5674242  (note: it doesn't include
> sound/soc/samsung/mini6410_wm9713.c file, which is a copy of the
> smdk6410_wm9713.c file)
> Here's the mini6410_wm9713.c file: http://pastie.org/5674322
>
>
> This is what I'm getting from boot:
>
> soc-audio soc-audio: ASoC machine SMDK WM9713 should use snd_soc_register_card()
> soc-audio soc-audio:  wm9713-hifi <-> samsung-ac97 mapping ok
> ALSA device list:
>   #0: MINI6410
>
> which is what I was expecting (at least that's what I get booting the
> FriendlyARM kernel).
>
> I had to unmute everything because everything was muted by default,
> but that really doesn't bother me.
>
> The bad part is that, as Andrey told us, the filter hack is necessary.
> If I remove it, I can't get any sound working.
> Even further, if I try to run some amixer sset commands to unmute a
> control, I get a few printfs with
> "ac97: req addr = 12, rep addr = 00".
The error occurs if the record occurred in the wrong register, which
was expected. Code of s3c_ac97_read s3c_ac97_write and s3c_ac97_irq
looks dirty. May be it some kind of workaround of some undocumented
bug. The only one restriction I found is: "AC_CODEC_CMD ... When the
commands are written on the AC_CODDEC_CMD register, It is recommended
to have the delay time
between the command and the next command is more than 1 / 48kHz.". But
it keeped and should not lead to this error.
I tried to rework this functions, remove delays, but error still happens.

> Also, there is one strange compile warning which I'm not able to
> understand where is coming from:
>
> WARNING: vmlinux.o(.data+0x6a78): Section mismatch in reference from
> the variable smdk6410_b_pwr_5v_data to the (unknown reference)
> .init.data:(unknown)
> The variable smdk6410_b_pwr_5v_data references
> the (unknown reference) __initdata (unknown)
> If the reference is valid then annotate the
> variable with __init* or __refdata (see linux/init.h) or name the variable:
> *_template, *_timer, *_sht, *_ops, *_probe, *_probe_one, *_console
>
> I do know that it came right after adding the mini6410_wm9713.c to the
> Makefile but that really shouldn't make it bug. Also, it has nothing
> to do with SMDK, which
> is what this warning is suggesting. I'm not using
> smdk6410_b_pwr_5v_data in my mach-mini6410.c so...
>
> Sylwester, I can start sending you well-formated patches now or I can
> wait for the filter hack to be fixed first, just say :)
>
> Regards all and thank you for your help!
>
> --
> alexandernst
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