[alsa-devel] PROBLEM: Asoc driver in for AT91SAM9260 / TLV320AIC3X is broken

Prchal Jiří jiri.prchal at aksignal.cz
Wed Mar 23 14:53:22 CET 2011

I fixed the problem:
in file "linux-2.6.38/sound/soc/atmel/snd-soc-afeb9260.c"
in function "afeb9260_soc_init"
is missing "platform_device_alloc("soc-audio", -1);".

I also add SPI functionality and external clock on BCLK to codec tlv320aic3x.
I'm sending diff, is this the right way to add it as patch to kernel releases?

I also discover the problem with SD card: not all cards can run at 375kHz at init state, I change minimal freq to
200kHz. It's in diff too.

Dne 11.3.2011 09:58, Prchal Jiří napsal(a):
> Hallo,
> at first I would like to apologize of sending this report to too many mails, but I can't find the right person / list.
> [2.] Full description of the problem/report:
> I try for almost 2 month to make kernel with alsa for my hardware. I first try version 2.6.37, now trying My
> hw i similar to board afeb-9260, just with difference my codec is TLV320AIC3106 connected as slave with clock on BCLK.
> So I change file snd-soc-afeb9260.c, diff is attached, and Kconfig and Makefile too.
> In version it works good, but MMC/SD card doesn't work. (Something is broken it that driver just in this
> version). I need to work sound and SD card.
> I thing the problem is somewhere between "tlv320aic3x-codec 0-001a: probe" and "i2c-core: driver [tlv320aic3x-codec]
> registered". In version there is I2C communication, in 2.6.37 and higher nothing on I2C.
> I also try to put newer alsa 1.0.24 to kernel without any improvement.
> Trying to put older alsa (but same version?) from kernel to produce soundcard, but when try to play
> kernel oops, "cannot dereference null pointer" and freezes.
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