HiFi Shield 2 issue

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gkkpch
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HiFi Shield 2 issue

Post by gkkpch »


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Re: HiFi Shield 2 issue

Post by odroid »

Is the pcm5242 device driver in C4 Kernel quite different from C2?
I think analog volume controller settings could be different.

Anyway, we will try to find a time slot in the next week to measure the output level of the HiFi Shield 2 on your Volumio image as well as our reference Ubuntu image.

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Re: HiFi Shield 2 issue

Post by gkkpch »

There is no hurry, it works, just a "little" too loud.
I don't have enough knowhow to judge why the Shield 2 on C2 behaves normal and on C4 it does not.
We had an issue in the past with gain, but that was eliminated with a patch that you also implemented.
Shield and Shield+ are fine...
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odroid (Fri Jun 19, 2020 9:23 am)

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Re: HiFi Shield 2 issue

Post by gkkpch »

Sorry for the late reply.
I finished the dt overlay configuration but still have issues with the loudness of the HiFi Shield2, Digital output can only be opened to level 30-35..
The current configuration is dangerous and therefore useless at the moment as it might burst someone's speaker system when not being careful.
We can't support the hifi shield2 until this
I do not know whether the driver is different from the C2 kernel.
Could it be something with the device tree definitions for the Shield2?

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Re: HiFi Shield 2 issue

Post by odroid »

We will check the range of output volume level in the next week since the driver developer has a summer vacation now.

Is that issue appearing with only HiFi Shield 2?
How is the original HiFi Shied and Plus?

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Re: HiFi Shield 2 issue

Post by gkkpch »

Thanks for your quick reply.
Next week is OK, Hifi Shield and Shield+ are working fine.

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Re: HiFi Shield 2 issue

Post by odroid »

In that case, something could be wrong in the analog volume control via I2C interface. We will check the analog volume control range.

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Re: HiFi Shield 2 issue

Post by gkkpch »

Any news on this issue?

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Re: HiFi Shield 2 issue

Post by cap00k »

gkkpch wrote:
Tue Aug 18, 2020 7:15 am
Any news on this issue?
Hi gkkpch,
I found a history of this issue in the C2 kernel.
https://github.com/hardkernel/linux/com ... 448b3bb4b#

I will make nearly identical patch in C4 kernel.
Please wait the patch.

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Re: HiFi Shield 2 issue

Post by gkkpch »

Yes, I'm aware of that patch, I think I was involved ;)
But I did not know which module to patch in the 4.9 kernel.

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Re: HiFi Shield 2 issue

Post by odroid »

Yes, it was you. :D

We will share a patch for C4 Kernel early next week.

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Re: HiFi Shield 2 issue

Post by odroid »

Try this patch. Analog volume control works fine after applying it.
https://github.com/hardkernel/linux/com ... c01bbfac34

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Re: HiFi Shield 2 issue

Post by gkkpch »

Thanks, I'll try it this week!

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Re: HiFi Shield 2 issue

Post by gkkpch »

In principle, it is a lot better.
But still too high for our purpose, therefore I lowered the volume level further down to 200.
Thanks for the patch!!
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odroid (Tue Sep 08, 2020 10:55 am)

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