i.mx53 has no audio output when using HDMI block.
i.mx53's HDMI audio output comes from S/PDIF normally.
I have modprobe snd-spdif.ko.
And with 'aplay' to check the card no and device no for s/pdif card.
Finally, use aplay -D 'hw:0,0' to play wav file. All seems ok!
But there is no sound from TV. TV is ok, we test it with other HDMI device.
I have tested this on several 2.6.35 release, including freescale's and linaro's.