I forgot tu my modified sam9g20_wm8741.c file, here is it...
---------- Forwarded message ---------- From: Michael Lathion m.lathion@gmail.com Date: 2013/6/20 Subject: WM8741 DAC with AT91SAM9G20 To: alsa-devel@alsa-project.org
Hi all,
I'm trying to use a WM8742 dac instead of WM8731 on a custom board based on AT91SAM9G20EK (developpment board from Atmel for AT91SAM9G20 soc) with Linux Kernel 2.6.38.
I have the driver working in alsa (driver compiled, mixer up in alsa, ...) but I can't have the ssc interface working. When trying to play sound with aplay I get only the masterclock and bitclock but no frame clock (LRCLK), see output below.
What I've done is modifying the /sound/soc/atmel/sam9g20_wm8731.c file but it seems something is not configured as it should (probably related to WM8742 being slave and the WM8731 used on original dev board was master for clock distribution).
My modified sam9g20_wm8741.c is enclosed to this mail, i suspect something is wrongly setup in CPU DAI configuration but can't find what.
I'm trying to set this up from some weeks now but can't find the right config so if someone have any idea on what can has to be done it could be great!
Thanks for help
Regards Michael
Linux kernel 2.6.38 AT91SAM9G20 processor WM8741 DAC
Kernel boot output :
ASoC: Mclk set to 22579200 wm8741-codec 0-001b: Successful registration FOX_Board_wm8741 : PB1003A: wm8741__init() called wm8741-codec 0-001b: wm8741_set_dai_sysclk info: freq=22579200 asoc: wm8741 <-> atmel-ssc-dai.0 mapping ok ALSA device list: #0: DAISY16
When trying play sound kernel driver print:
wm8741-codec 0-001b: wm8741_set_dai_fmt: Format=0, Clock Inv=0 wm8741-codec 0-001b: wm8741_hw_params: bit size param = 2