On Thu, Oct 12, 2017 at 09:07:55AM +0300, Peter Ujfalusi wrote: > I don't see much benefit of using McASP on OMAP4, only drawbacks... It > lacks AFIFO so it is prone to underrun and if it underruns you need to > reset McASP. Been there with the Samsung Galaxy Nexus. AESS/ATC isn't able to consistently respond to a DMA request within 20 us ? Strange.. I would have expected it to have no trouble with that. (And presumably so did TI, or they would have included AFIFO?) > I wonder how Motorola is using the McASP as the OMAP4 version > (officially) does not support I2S. Hmm? I checked the omap4430 TRM and I don't see that mentioned. It seems to have pins for i2s transmit: abe_mcasp_axr O Audio transmit data abe_mcasp_aclkx O Transmit bit clock abe_mcasp_ahclkx O Transmit high-frequency master clock abe_mcasp_afsx O Transmit frame synchronization abe_mcasp_amute O Mute out to external abe_mcasp_amutein I Mute in from external If it supported s/pdif tx only, then all of these except axr would be useless. Matthijs -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
