Re: [PATCH v5 2/7] ASoC: tegra: Allow 24bit and 32bit samples

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On 07/01/2020 10:29, Jon Hunter wrote:

On 05/01/2020 10:53, Ben Dooks wrote:


On 2020-01-05 01:48, Dmitry Osipenko wrote:
05.01.2020 03:04, Ben Dooks пишет:
[snip]

I've just gone through testing.

Some simple data tests show 16 and 32-bits work.

The 24 bit case seems to be weird, it looks like the 24-bit expects
24 bit samples in 32 bit words. I can't see any packing options to
do 24 bit in 24 bit, so we may have to remove 24 bit sample support
(which is a shame)

My preference is to remove the 24-bit support and keep the 32 bit in.


Interesting.. Jon, could you please confirm that 24bit format isn't
usable on T30?

If there is an option of 24 packed into 32, then I think that would work.

I can try testing that with raw data on Monday.

I will check on this. I would have thought that S24_LE (24-bits packed
into 32-bit elements) would be fine. Typically we don't support S24_3LE
(24-bits in 24-bit elements).

I will have a look again, I thought S24 was 24-in-24, so wrote my test
generator code to do that. I'll go and see if I can re-test this as soon
as possible (may be Wed/Thu by the time I can get to check it)

--
Ben Dooks				http://www.codethink.co.uk/
Senior Engineer				Codethink - Providing Genius

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