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Re: [PATCH v2] arm: dts: Fix audio card detection on peach boards

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  Re: [PATCH v2] arm: dts: Fix audio card detection on peach boards Javier Martinez Canillas <javier@osg.samsung.com> - 2015-11-30 15:10 +0100
    Re: [PATCH v2] arm: dts: Fix audio card detection on peach boards Alim Akhtar <alim.akhtar@gmail.com> - 2015-11-30 18:10 +0100
      Re: [PATCH v2] arm: dts: Fix audio card detection on peach boards Javier Martinez Canillas <javier@osg.samsung.com> - 2015-11-30 19:30 +0100

#1279900 — Re: [PATCH v2] arm: dts: Fix audio card detection on peach boards

Hello Alim,

On 10/12/2015 09:37 AM, Alim Akhtar wrote:
> Since commit 2fad972d45c4 ("ARM: dts: Add mclk entry for Peach boards"),
> sound card detection is broken on peach boards and gives below errors:
> 
> [    3.630457] max98090 7-0010: MAX98091 REVID=0x51
> [    3.634233] max98090 7-0010: use default 2.8v micbias
> [    3.640985] snow-audio sound: HiFi <-> 3830000.i2s mapping ok
> [    3.645307] max98090 7-0010: Invalid master clock frequency
> [    3.650824] snow-audio sound: ASoC: Peach-Pi-I2S-MAX98091 late_probe() failed: -22
> [    3.658914] snow-audio sound: snd_soc_register_card failed (-22)
> [    3.664366] snow-audio: probe of sound failed with error -22
> 
> This patch adds missing assigned-clocks and assigned-clock-parents for
> pmu_system_controller node which is used as "mclk" for audio codec.
> 
> Signed-off-by: Alim Akhtar <alim.akhtar@samsung.com>
> Fixes: 2fad972d45c4 ("ARM: dts: Add mclk entry for Peach boards")

I found that this patch is not enough to have proper audio working
on an Exynos5800 Peach Pi. Even playing a simple wav does not work:

$ time aplay -D sysdefault /usr/share/sounds/alsa/Front_Center.wav 
Playing WAVE '/usr/share/sounds/alsa/Front_Center.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Mono

real	0m1.138s
user	0m0.005s
sys	0m0.005s

This should be ~1.5 seconds so audio is processed faster than expected.

So something else besides making the CLKOUT to provide a valid frequency
for the codec's master clock is needed.

Do you know what's missing in mainline? For instance, I see that the
sound/soc/samsung/snow.c ASoC machine driver doesn't have a hw_params
but I'm not that familiar with ALSA to know if that makes sense or not.

Also, do you know if the "simple-audio-card" can be used instead for
snow and peachs as it is used for other Exynos5 boards or a specific
ASoC machine driver is really needed for these Chromebooks?

Best regards,
-- 
Javier Martinez Canillas
Open Source Group
Samsung Research America
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#1280109

Hi Javier,

On Mon, Nov 30, 2015 at 7:31 PM, Javier Martinez Canillas
<javier@osg.samsung.com> wrote:
> Hello Alim,
>
> On 10/12/2015 09:37 AM, Alim Akhtar wrote:
>> Since commit 2fad972d45c4 ("ARM: dts: Add mclk entry for Peach boards"),
>> sound card detection is broken on peach boards and gives below errors:
>>
>> [    3.630457] max98090 7-0010: MAX98091 REVID=0x51
>> [    3.634233] max98090 7-0010: use default 2.8v micbias
>> [    3.640985] snow-audio sound: HiFi <-> 3830000.i2s mapping ok
>> [    3.645307] max98090 7-0010: Invalid master clock frequency
>> [    3.650824] snow-audio sound: ASoC: Peach-Pi-I2S-MAX98091 late_probe() failed: -22
>> [    3.658914] snow-audio sound: snd_soc_register_card failed (-22)
>> [    3.664366] snow-audio: probe of sound failed with error -22
>>
>> This patch adds missing assigned-clocks and assigned-clock-parents for
>> pmu_system_controller node which is used as "mclk" for audio codec.
>>
>> Signed-off-by: Alim Akhtar <alim.akhtar@samsung.com>
>> Fixes: 2fad972d45c4 ("ARM: dts: Add mclk entry for Peach boards")
>
> I found that this patch is not enough to have proper audio working
> on an Exynos5800 Peach Pi. Even playing a simple wav does not work:
>
> $ time aplay -D sysdefault /usr/share/sounds/alsa/Front_Center.wav
> Playing WAVE '/usr/share/sounds/alsa/Front_Center.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Mono
>
> real    0m1.138s
> user    0m0.005s
> sys     0m0.005s
>
> This should be ~1.5 seconds so audio is processed faster than expected.
>
Did you tried playing any other file, like 128 KHz rate files etc..?
> So something else besides making the CLKOUT to provide a valid frequency
> for the codec's master clock is needed.
>
The $SUBJECT patch actually  fix the audio card detection issue, which
was failing because of the missing master clock.

> Do you know what's missing in mainline? For instance, I see that the
> sound/soc/samsung/snow.c ASoC machine driver doesn't have a hw_params
> but I'm not that familiar with ALSA to know if that makes sense or not.
>
I need to check this, currently I am out on a business travel, so
won't be able to check.
Probably we can go back to before "2fad972d45c4" and check that.

> Also, do you know if the "simple-audio-card" can be used instead for
> snow and peachs as it is used for other Exynos5 boards or a specific
> ASoC machine driver is really needed for these Chromebooks?
>
Not sure, AFAIR, I used machine driver on chromebooks (snow and peach).

> Best regards,
> --
> Javier Martinez Canillas
> Open Source Group
> Samsung Research America
> --
> To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html



-- 
Regards,
Alim
--
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#1280173

Hi Alim,

On 11/30/2015 01:59 PM, Alim Akhtar wrote:
> Hi Javier,
> 
> On Mon, Nov 30, 2015 at 7:31 PM, Javier Martinez Canillas
> <javier@osg.samsung.com> wrote:
>> Hello Alim,
>>
>> On 10/12/2015 09:37 AM, Alim Akhtar wrote:
>>> Since commit 2fad972d45c4 ("ARM: dts: Add mclk entry for Peach boards"),
>>> sound card detection is broken on peach boards and gives below errors:
>>>
>>> [    3.630457] max98090 7-0010: MAX98091 REVID=0x51
>>> [    3.634233] max98090 7-0010: use default 2.8v micbias
>>> [    3.640985] snow-audio sound: HiFi <-> 3830000.i2s mapping ok
>>> [    3.645307] max98090 7-0010: Invalid master clock frequency
>>> [    3.650824] snow-audio sound: ASoC: Peach-Pi-I2S-MAX98091 late_probe() failed: -22
>>> [    3.658914] snow-audio sound: snd_soc_register_card failed (-22)
>>> [    3.664366] snow-audio: probe of sound failed with error -22
>>>
>>> This patch adds missing assigned-clocks and assigned-clock-parents for
>>> pmu_system_controller node which is used as "mclk" for audio codec.
>>>
>>> Signed-off-by: Alim Akhtar <alim.akhtar@samsung.com>
>>> Fixes: 2fad972d45c4 ("ARM: dts: Add mclk entry for Peach boards")
>>
>> I found that this patch is not enough to have proper audio working
>> on an Exynos5800 Peach Pi. Even playing a simple wav does not work:
>>
>> $ time aplay -D sysdefault /usr/share/sounds/alsa/Front_Center.wav
>> Playing WAVE '/usr/share/sounds/alsa/Front_Center.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Mono
>>
>> real    0m1.138s
>> user    0m0.005s
>> sys     0m0.005s
>>
>> This should be ~1.5 seconds so audio is processed faster than expected.
>>
> Did you tried playing any other file, like 128 KHz rate files etc..?

Yes, I see the same problem with all the files I tested.

>> So something else besides making the CLKOUT to provide a valid frequency
>> for the codec's master clock is needed.
>>
> The $SUBJECT patch actually  fix the audio card detection issue, which
> was failing because of the missing master clock.
>

I thought the problem was not a missing master clock, but an invalid clock
frequency. Since the error message in the patch change log was:

"max98090 7-0010: Invalid master clock frequency"

But what I tried to ask was what else was missing to have playback working.

>> Do you know what's missing in mainline? For instance, I see that the
>> sound/soc/samsung/snow.c ASoC machine driver doesn't have a hw_params
>> but I'm not that familiar with ALSA to know if that makes sense or not.
>>
> I need to check this, currently I am out on a business travel, so
> won't be able to check.

No worries, I was asked in case you had more information. Audio is the
only thing that is missing to have all peripherals working correctly with
mainline.

> Probably we can go back to before "2fad972d45c4" and check that.
>

Do you mean to revert $SUBJECT and "2fad972d45c4" to see if the bootloader
sets this correctly? If I revert both patches then I have no audio at all.
 
>> Also, do you know if the "simple-audio-card" can be used instead for
>> snow and peachs as it is used for other Exynos5 boards or a specific
>> ASoC machine driver is really needed for these Chromebooks?
>>
> Not sure, AFAIR, I used machine driver on chromebooks (snow and peach).
>

Yes, the downstream 3.8 ChromiumOS tree has also a machine driver but I
don't see a simple-audio-card in that tree so it seems that predates it.

-- 
Javier Martinez Canillas
Open Source Group
Samsung Research America
--
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the body of a message to majordomo@vger.kernel.org
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