Vova Barinov wrote:
Mark Brown wrote:
On Fri, Mar 28, 2008 at 09:27:04AM -0500, lokowich wrote:
Forwarded from davinci-linux-open-source list:
CCing in Vladimir Barinov who contributed the DaVinci support.
I've built this ASoC patch into my DaVinci git kernel (thanks for the SENSORS tip), and can use aplay and speaker-test, but no sound. Figured it may be a mixer/volume control issue, but the alsamixer is unable to open for a failed ioctl on USBDEVFS_IOCTL. Not sure why there is a USB dependency. Noted that there is no /sys/class/sound/mixer in my sysfs. Any ideas?
How do you figure out that you can play sound? Also what platform do you use - is it Davinci-EVM? what line output do you use to hear the sound? Please, post your dmesg log and cat /proc/interrupts too.
Excerpt from dmesg: Advanced Linux Sound Architecture Driver Version 1.0.16. ASoC version 0.13.2 AIC3X Audio Codec 0.1 asoc: aic3x <-> davinci-i2s mapping ok ALSA device list: #0: DaVinci EVM (aic3x)
/proc/interrupts: CPU0 6: 0 AINTC dm644xresizer 8: 23608 AINTC davincifb 13: 6995 AINTC EMAC 22: 107 AINTC ide0 32: 39436 AINTC clockevent 33: 3 AINTC free-run counter 39: 217 AINTC i2c_davinci 40: 204 AINTC serial Err: 0
This is the DM6446 EVM. Note, my kernel has been patched with latest ALSA, to no avail. I hear the DAC pop during initialization on both the Line Out and Headphone jacks.
It might be helpful to post dmesg output showing the sound support being loaded
Bernard Blackham wrote:
Behme wrote:
While searching something different, I just found
http://www.spinics.net/lists/alsa-devel/msg12535.html
As I'm not subscribed to alsa-devel, I don't have the original post. Maybe any of the authors can post it do this list as well?
The patch mainly applies to our git. I fixed two small rejects in Kconfig and Makefile as the patch is for newer kernel than our git. Untested patch against our git in attachment. Anybody likes to test?
Well, I tried compiling it and it failed to build. It appears that it's built on a set of patches for Davinci posted to LAK, including this completely revamped EDMA support[1]:
Yep, it's needed.
So I had to change a few definitions, import a few functions from the new DMA support and managed to get it compiling and loading, but not yet working (tried various sample rates and formats):
root@davinci-dvevm:/tst$ aplay test.wav Playing WAVE 'test.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo ALSA lib pcm_params.c:2152:(snd_pcm_hw_refine_slave) Slave PCM not usable aplay: set_params:878: Broken configuration for this PCM: no configurations available
root@davinci-dvevm:/tst$ arecord -r 48000 -f S16_LE Recording WAVE 'stdin' : Signed 16 bit Little Endian, Rate 48000 Hz, Mono ALSA lib pcm_params.c:2152:(snd_pcm_hw_refine_slave) Slave PCM not usable arecord: set_params:878: Broken configuration for this PCM: no configurations available
And this is the extent of my knowledge of ALSA - I can continue digging, but maybe somebody else will beat me to it =) It's looking promising though.
Attached is the patch I have so far that applies against current git. This is not for going upstream, but just for testing. Notes:
- Apply patch
- Enable SND_SOC, SND_DAVINCI_SOC, SND_DAVINCI_SOC_I2S, SND_DAVINCI_SOC_EVM
and SND_SOC_TLV320AIC3X.
- Make sure CONFIG_I2C_DAVINCI is enabled, but disable the
CONFIG_SENSORS_TLV320* options.
- Build.
- Load the snd-soc-evm module.
Bernard.
[1] These patches appear to have gone absolutely nowhere beyond that list. I can't find them in any tree. But they are cleaner and more conforming to the Linux Kernel style than what's currently in git.
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