Multichannel I2S via HDMI into AVR

Multichannel PCM via HDMI into AVR

Is it possible to feed multichannel I2S (3 x stereo from Najda DSP) via HDMI into an AVR (Onkyo TX-NR1007)? Is there some kind of converter? All I found is this, but it has just one I2S input.
 
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