alsa on my target device says "cannot find card'0'" - audio

Question

I'm trying to enable my target's sound card to work through ALSA, it's a Qualcomm MSM8660 Snapdragon which means there is no pci devices and running a kind of embedded linux.
Because this device is originally a commercial android phone so I'm sure it has proper built-in audio drivers on its kernel but ALSA doesn't recognize audiocards at all.
I believe this is because I didn't write any of alsa configuration files like /etc/asound.conf and /usr/share/alsa/alsa.conf (I tried the default alsa.conf that comes with its build source but no luck)
what it says with the below commands are:
/dev # ls pcm*
pcmC0D0c pcmC0D0p pcmC0D1c pcmC0D1p
/dev # cat /proc/asound/cards
0 [msmaudio ]: - msm-audio
msm-audio
/dev # cat /proc/asound/devices
0: [ 0] : control
16: [ 0- 0]: digital audio playback
17: [ 0- 1]: digital audio playback
24: [ 0- 0]: digital audio capture
25: [ 0- 1]: digital audio capture
33: : timer
/dev # cat /proc/asound/pcm
00-00: DSP 1 msm-codec-dai-0 : : playback 2 : capture 1
00-01: MVS mvs-codec-dai-1 : : playback 1 : capture 1
/dev # cat /proc/asound/timers
G0: system timer : 10000.000us (10000000 ticks)
P0-0-0: PCM playback 0-0-0 : SLAVE
P0-0-1: PCM capture 0-0-1 : SLAVE
P0-0-2: PCM playback 0-0-2 : SLAVE
P0-1-0: PCM playback 0-1-0 : SLAVE
P0-1-1: PCM capture 0-1-1 : SLAVE
/dev # cat /proc/asound/card0/pcm0p/info
card: 0
device: 0
subdevice: 0
stream: PLAYBACK
id: DSP 1 msm-codec-dai-0
name:
subname: subdevice #0
class: 0
subclass: 0
subdevices_count: 2
subdevices_avail: 2
/dev # cat /proc/asound/card0/pcm1p/info
card: 0
device: 1
subdevice: 0
stream: PLAYBACK
id: MVS mvs-codec-dai-1
name:
subname: subdevice #0
class: 0
subclass: 0
subdevices_count: 1
subdevices_avail: 1
Please let me know what I should do to make it play.
I appreciate in advance.
Have a great day.
I added the default alsa.conf of the official alsa-lib source to /usr/share/also and wrote a very simple asound.conf at /etc
pcm.!default {
type hw
card 0
}
ctl.!default {
type hw
card 0
}
and the result is,
/temp # aplay- l
**** List of PLAYBACK Hardware Devices ****
card 0: msmaudio [msm-audio], device 0: DSP 1 msm-codec-dai-0 []
Subdevices: 2/2
Subdevice #0: subdevice #0
Subdevice #1: subdevice #1
card 0: msmaudio [msm-audio], device 1: MVS mvs-codec-dai-1 []
Subdevices: 1/1
Subdevice #0: subdevice #0
so the problem was configuration files, I got another problem that aplay is stuck at
/temp # aplay -i ./gbb.mp3
...
...
access("//.asoundrc", R_OK) = -1 ENOENT (No such file or directory)
open("/dev/snd/controlC0", O_RDWR|O_CLOEXEC) = 3
fcntl64(3, F_SETFD, FD_CLOEXEC) = 0
ioctl(3, SNDRV_CTL_IOCTL_PVERSION or USBDEVFS_CONTROL or USBDEVFS_CONTROL32, 0xbedb085c) = 0
ioctl(3, SNDRV_CTL_IOCTL_PCM_PREFER_SUBDEVICE, 0xbedb0880) = 0
open("/dev/snd/pcmC0D0p", O_RDWR|O_NONBLOCK|O_CLOEXEC
...
...
but I guess this isn't about configuration any more.