[alsa-devel] No soundcards found with 2.6.37 (and 2.6.38-rc2)

[Sven Neumann]

Hi,

we are using an ARM PXA300 based device with SoC devices. The code is
completely upstream, our platform is defined in sound/soc/pxa/raumfeld.c

I've recently tried to update our kernel to 2.6.37, but it looks like
there have been some changes in the Linux kernel that cause our sound
hardware not to be recognized or initialised correctly any longer.

This is the output when booting Linux 2.6.36.3:

[   26.909242] Asahi Kasei AK4104 ALSA SoC Codec Driver
[   26.915118] No device for DAI ak4104
[   26.918680] ak4104 spi0.0: SPI device initialized
[   26.923870] Cirrus Logic CS4270 ALSA SoC Codec Driver
[   26.929471] cs4270 0-0048: found device at i2c address 48
[   26.934935] cs4270 0-0048: hardware revision 3
[   26.941557] No device for DAI pxa2xx-ssp1
[   26.945554] No device for DAI pxa2xx-ssp2
[   26.949533] No device for DAI pxa2xx-ssp3
[   26.953590] No device for DAI pxa2xx-ssp4
[   26.959814] asoc: cs4270 <-> pxa2xx-ssp1 mapping ok
[   26.970007] asoc: ak4104 <-> pxa2xx-ssp2 mapping ok
[   27.080719] ALSA device list:
[   27.083690]   #0: Raumfeld analog (CS4270)
[   27.087750]   #1: Raumfeld S/PDIF (ak4104)

And here are the relevant lines from booting 2.6.37:

[   26.927802] Asahi Kasei AK4104 ALSA SoC Codec Driver
[   26.933269] Cirrus Logic CS4270 ALSA SoC Codec Driver
[   26.938886] cs4270-codec 0-0048: found device at i2c address 48
[   26.944774] cs4270-codec 0-0048: hardware revision 3
[   27.058972] ALSA device list:
[   27.061933]   No soundcards found.


Based on this output I've done a git bisect. Unfortunately there is a
larger series of commits that don't even compile, so I have not been
able to find out the exact commit that broke it, but I've boiled it down
to a number of commits:

There are only 'skip'ped commits left to test.
The first bad commit could be any of:
5dcba5d6741d4533e0ef696507f93f2a4c738efb
cf7af01aa77ec1b17687f5328ce0a598709efd59
54d8d0aeb96e677c129918b391b9e74d48e65294
a6d14342dc46f0ef94cccf323fd9481de84b458f
48bd3472d6512c74257706f7c38ad10a7117bac7
960d0697919aef453273e3a0ccc87daf52d808ac
381ac990db3f4fdfbe91e3a636cab03edf293b9c
38445af3bc0658615fd9a724fbcb67148eac2cd3
13cb61f8c261ca6a218f83f4ee9c3bd5cfc223a5
af3751a0bfe4d461e0567961dc06448f2128e26f
26e277d7151abcef8efa1e6f1f0d1420d4ed17c6
6ba6c9c3414b95c3ed50d529fb0efa744ed45761
10e2f11326e0a263f0336686454be67efb2b56dc
ff71334a46844d0ae6ff0055c549790bcd27bb10
87a0632b29410bab5c1783d7eb979c8d942d4209
dd99a4524bd9f82358e9a20a44c5e784baa4e702
1a3c5a491af6756dbba6ee166a9dee72bb414ba8
f5d1e5ed58dc0178e1678db63156772999379d49
6e6f66226f0092a39526f8d6f02ebb447d995be2
6f341d14811550d863ba804ce6ec7757a7145081
eaae183f4b3f25522cd13ebf30162c1cb863b1f1
9d37e8947c613190b7b92c63830e638ffdb08e48
e231cab0a4b5844ae13a9584433ca3b9b204629e
f51582fd8d9b1196d58cd94c2b4b759cc1baf57a
3782a528974c9607bde03ec265bbebd2dc300ea1
698cb111f44d81dd3a604ba2a7f3f865b66b9ddf
8ef339df25ed424e7430fd411a52840c6af368c6
9a76f1ff6e299fbb04149fe15aff061351fd0dab
c5607d8e7a4c30d2ff62b8eefe3f977d5c71d2fe
f0fba2ad1b6b53d5360125c41953b7afcd6deff0
ba2772edbe1f03a695029ca82844615fe41d28fc
We cannot bisect more!


As far as I can see these patches are all part of the introduction of
ASoC Multi-Component Support. Perhaps someone who's been working on this
could have a look and give me some hints on how to proceed further?

I've already tried 2.6.38-rc2 with same results as with 2.6.37.


Thanks,
Sven


-- 
Sven Neumann
Head of RAUMFELD Software Development

Lautsprecher Teufel GmbH | Bülowstr. 66 | 10783 Berlin | Germany
Tel: +49 (0)30-300 930 153 | s.neumann at raumfeld.com