Dear Sascha, in "imx_ssi_set_dai_fmt()" callback you should add something like: /* sync */ scr |= SSI_SCR_SYN; This would enable SSI working in SYN mode which means that RX and TX sections will share same frame and bit clocks. Right now I can't imagine a situation where this is not desirable. Moreover, if I don't add SYN mode I cannot get it working in my i.mx27 based board with an wm8974. With this line it works flawlessly, good job. Thanks. -- Javier Martin Vista Silicon S.L. CDTUC - FASE C - Oficina S-345 Avda de los Castros s/n 39005- Santander. Cantabria. Spain +34 942 25 32 60 www.vista-silicon.com _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel