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atmel_ssc_dai, duplex audio support?

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  atmel_ssc_dai, duplex audio support? Peter Meerwald-Stadler <pmeerw@pmeerw.net> - 2016-08-03 17:20 +0200

#1455857 — atmel_ssc_dai, duplex audio support?

Hello,

it appears that atmel_ssc_dai does not support duplex audio, i.e. when
first starting a playback stream and then starting a record stream, the 
playback stops

problem seems to be in atmel_ssc_startup():

/* Reset the SSC to keep it at a clean status */
ssc_writel(ssc_p->ssc->regs, CR, SSC_BIT(CR_SWRST));

which is performed unconditionally when a stream starts

code was introduced with 
ASoC: atmel_ssc_dai: refactor the startup and shutdown, commit cbaadf0f90d6

tested with the 4.1 branch of linux-at91 git

thanks, regards, p.

-- 

Peter Meerwald-Stadler
+43-664-2444418 (mobile)

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