alsa audio open error

Dear Biser,

No Problem,

Dear Kemal,

Hope you are doing good, am very happy that you are addressing this thread

For your reference, I have hereby attached the asound.conf(modified for routing)

I the stereo codec (UDA1345TS) Sound card, I have created four devices ie., VINL8, VINR8, VOUTL8 & VOUTR8 using dsnoop & dshare in asound.conf

And made use of these four devices for my application as described below

Kindly do the needful as early as possible

Many Thanks in advance

#This configuration for 3.14 kernel
pcm.card0 {
  type hw
  card 0
}

ctl.card0 {
  type hw
  card 0
}


###Dshare 

pcm.VOUTL8 {
        type dshare
        ipc_key 6678293
        ipc_key_add_uid yes
        slave {
                pcm "hw:0,0"
		        rate 8000
                buffer_size 4097
                period_size 1000
                period_time 125000

        }
        bindings {
                0 0
        }
}

pcm.VOUTR8 {
        type dshare
        ipc_key 6678293
        ipc_key_add_uid yes
        slave {
                pcm "hw:0,0"
		        rate 8000
		        buffer_size 4097
                period_size 1000
         	    period_time 125000
		
        }
        bindings {
                0 1
        }
}
### Dsnoop splited channels
pcm.VINL8 {
        type dsnoop
        ipc_key 32
        slave {

	            pcm "hw:0,0"
	            rate 8000
                buffer_size 4097    
                period_size 1000
                period_time 125000

         channels 2
     }
     bindings.0  0
}

pcm.VINR8 {
     type dsnoop
     ipc_key 32
     slave {
	            pcm "hw:0,0"
	            rate 8000
                buffer_size 4097
                period_size 1000
                period_time 125000

         channels 2
     }
     bindings.0  1
}



###Dshare 16k 

pcm.VOUTL16 {
        type dshare
        ipc_key 6678293
        ipc_key_add_uid yes
        slave {
                pcm "hw:0,0"
                rate 16000
                buffer_size 4097
                period_size 1000
                period_time 125000

        }
        bindings {
                0 0
        }
}

pcm.VOUTR16 {
        type dshare
        ipc_key 6678293
        ipc_key_add_uid yes
        slave {
                pcm "hw:0,0"
                rate 16000
                buffer_size 4097
                period_size 1000
                period_time 125000


        }
        bindings {
                0 1
        }
}
### Dsnoop splited channels
pcm.VINL16 {
     type dsnoop
     ipc_key 32
     slave {

                pcm "hw:0,0"
                rate 16000
                buffer_size 4097
                period_size 1000
                period_time 125000

         channels 2
     }
     bindings.0  0
}

pcm.VINR16 {
     type dsnoop
     ipc_key 32
     slave {

                pcm "hw:0,0"
                rate 16000
                buffer_size 4097
                period_size 1000
                period_time 125000

         channels 2
     }
     bindings.0  1
}


###Dshare 32k

pcm.VOUTL32 {
        type dshare
        ipc_key 6678293
        ipc_key_add_uid yes
        slave {
                pcm "hw:0,0"
                rate 32000
                buffer_size 4097
                period_size 1000
                period_time 125000

        }
        bindings {
                0 0
        }
}

pcm.VOUTR32 {
        type dshare
        ipc_key 6678293
        ipc_key_add_uid yes
        slave {
                pcm "hw:0,0"
                rate 32000
                buffer_size 4097
                period_size 1000
                period_time 125000


        }
        bindings {
                0 1
        }
}
### Dsnoop splited channels
pcm.VINL32 {
     type dsnoop
     ipc_key 32
     slave {

                pcm "hw:0,0"
                rate 32000
                buffer_size 4097
                period_size 1000
                period_time 125000

         channels 2
     }
     bindings.0  0
}

pcm.VINR32 {
     type dsnoop
     ipc_key 32
     slave {

                pcm "hw:0,0"
                rate 32000
                buffer_size 4097
                period_size 1000
                period_time 125000

         channels 2
     }
     bindings.0  1
}


###Dshare 44k

pcm.VOUTL44 {
        type dshare
        ipc_key 6678293
        ipc_key_add_uid yes
        slave {
                pcm "hw:0,0"
                rate 44100
                buffer_size 4097
                period_size 1000
                period_time 125000

        }
        bindings {
                0 0
        }
}

pcm.VOUTR44 {
        type dshare
        ipc_key 6678293
        ipc_key_add_uid yes
        slave {
                pcm "hw:0,0"
                rate 44100
                buffer_size 4097
                period_size 1000
                period_time 125000


        }
        bindings {
                0 1
        }
}
### Dsnoop splited channels
pcm.VINL44 {
     type dsnoop
     ipc_key 32
     slave {

                pcm "hw:0,0"
                rate 44100
                buffer_size 4097
                period_size 1000
                period_time 125000

         channels 2
     }
     bindings.0  0
}

pcm.VINR44 {
     type dsnoop
     ipc_key 32
     slave {

                pcm "hw:0,0"
                rate 44100
                buffer_size 4097
                period_size 1000
                period_time 125000

         channels 2
     }
     bindings.0  1
}

###Dshare 48k
pcm.VOUTL48 {
        type dshare
        ipc_key 6678293
        ipc_key_add_uid yes
        slave {
                pcm "hw:0,0"
                rate 48000
                buffer_size 4097
                period_size 1000
                period_time 125000

        }
        bindings {
                0 0
        }
}

pcm.VOUTR48 {
        type dshare
        ipc_key 6678293
        ipc_key_add_uid yes
        slave {
                pcm "hw:0,0"
                rate 48000
                buffer_size 4097
                period_size 1000
                period_time 125000


        }
        bindings {
                0 1
        }
}

### Dsnoop splited channels
pcm.VINL48 {
     type dsnoop
     ipc_key 32
     slave {

                pcm "hw:0,0"
                rate 48000
                buffer_size 4097
                period_size 1000
                period_time 125000

         channels 2
     }
     bindings.0  0
}

pcm.VINR48 {
     type dsnoop
     ipc_key 32
     slave {

                pcm "hw:0,0"
                rate 48000
                buffer_size 4097
                period_size 1000
                period_time 125000

         channels 2
     }
     bindings.0  1
}



pcm.!default VOUTR8
pcm.!default VOUTL8
pcm.!default VOUTR16
pcm.!default VOUTL16
pcm.!default VOUTR32
pcm.!default VOUTL32
pcm.!default VOUTR44
pcm.!default VOUTL44
pcm.!default VOUTR48
pcm.!default VOUTL48

Could you attach these two logs.

root@lifeline:~# ps > notworking.log
root@lifeline:~# arecord -D VINL8 -f S16_LE | aplay -D VOUTR8 #execute arecord & aplay until it start to work
root@lifeline:~# ps > working.log

Dear Kemal,

Thanks a lot for your prompt responses,

Please find the attached logs:

PID   USER     TIME   COMMAND
    1 root       0:00 init [5]
    2 root       0:00 [kthreadd]
    3 root       0:00 [ksoftirqd/0]
    4 root       0:00 [kworker/0:0]
    5 root       0:00 [kworker/0:0H]
    6 root       0:00 [kworker/u2:0]
    7 root       0:00 [khelper]
    8 root       0:00 [kdevtmpfs]
    9 root       0:00 [kworker/u2:1]
   43 root       0:00 [kworker/0:1]
  178 root       0:00 [writeback]
  181 root       0:00 [bioset]
  182 root       0:00 [crypto]
  184 root       0:00 [kblockd]
  269 root       0:00 [khubd]
  393 root       0:00 [kswapd0]
  394 root       0:00 [fsnotify_mark]
  466 root       0:00 [irq/150-mmc0]
  468 root       0:00 [kworker/u2:2]
  497 root       0:00 [irq/32-TI-am335]
  515 root       0:00 [mmcqd/1]
  516 root       0:00 [mmcqd/1boot0]
  517 root       0:00 [mmcqd/1boot1]
  523 root       0:00 [deferwq]
  524 root       0:00 [irq/86-44e0b000]
  525 root       0:00 [kworker/u2:3]
  560 root       0:00 [kworker/0:2]
  571 root       0:00 [kworker/0:1H]
  572 root       0:00 [jbd2/mmcblk0p3-]
  573 root       0:00 [ext4-rsv-conver]
  593 root       0:00 /sbin/ifplugd
  594 root       0:00 [kworker/0:3]
  614 root       0:00 /lib/udev/udevd -d
  802 root       0:00 /lib/udev/udevd -d
  803 root       0:00 /lib/udev/udevd -d
  992 root       0:00 udhcpc -R -n -p /var/run/udhcpc.eth0.pid -i eth0
 1060 root       0:00 [ext4-rsv-conver]
 1090 root       0:00 [jbd2/mmcblk0p6-]
 1091 root       0:00 [ext4-rsv-conver]
 1106 root       0:00 /sbin/syslogd -n -O /media/userdata/messages -S
 1109 root       0:00 /bin/login --
 1110 root       0:00 /sbin/getty 38400 tty1
 1111 root       0:00 /sbin/klogd -n
 1113 root       0:00 [jbd2/mmcblk0p7-]
 1114 root       0:00 [ext4-rsv-conver]
 1149 root       0:00 -sh
 1160 root       0:00 ps

PID   USER     TIME   COMMAND
    1 root       0:00 init [5]
    2 root       0:00 [kthreadd]
    3 root       0:00 [ksoftirqd/0]
    4 root       0:00 [kworker/0:0]
    5 root       0:00 [kworker/0:0H]
    6 root       0:00 [kworker/u2:0]
    7 root       0:00 [khelper]
    8 root       0:00 [kdevtmpfs]
    9 root       0:00 [kworker/u2:1]
   43 root       0:00 [kworker/0:1]
  178 root       0:00 [writeback]
  181 root       0:00 [bioset]
  182 root       0:00 [crypto]
  184 root       0:00 [kblockd]
  269 root       0:00 [khubd]
  393 root       0:00 [kswapd0]
  394 root       0:00 [fsnotify_mark]
  466 root       0:00 [irq/150-mmc0]
  468 root       0:00 [kworker/u2:2]
  497 root       0:00 [irq/32-TI-am335]
  515 root       0:00 [mmcqd/1]
  516 root       0:00 [mmcqd/1boot0]
  517 root       0:00 [mmcqd/1boot1]
  523 root       0:00 [deferwq]
  524 root       0:00 [irq/86-44e0b000]
  525 root       0:00 [kworker/u2:3]
  560 root       0:00 [kworker/0:2]
  571 root       0:00 [kworker/0:1H]
  572 root       0:00 [jbd2/mmcblk0p3-]
  573 root       0:00 [ext4-rsv-conver]
  593 root       0:00 /sbin/ifplugd
  594 root       0:00 [kworker/0:3]
  617 root       0:00 /lib/udev/udevd -d
  801 root       0:00 /lib/udev/udevd -d
  802 root       0:00 /lib/udev/udevd -d
 1026 root       0:00 udhcpc -R -n -p /var/run/udhcpc.eth0.pid -i eth0
 1067 root       0:00 [ext4-rsv-conver]
 1089 root       0:00 [jbd2/mmcblk0p6-]
 1091 root       0:00 [ext4-rsv-conver]
 1095 root       0:00 /sbin/syslogd -n -O /media/userdata/messages -S
 1101 root       0:00 /sbin/klogd -n
 1102 root       0:00 /bin/login --
 1103 root       0:00 /sbin/getty 38400 tty1
 1115 root       0:00 [jbd2/mmcblk0p7-]
 1116 root       0:00 [ext4-rsv-conver]
 1151 root       0:00 -sh
 1154 root       0:00 arecord -D VINL8 -f S16_LE
 1155 root       0:00 aplay -D VOUTR8
 1156 root       0:00 ps

And two more points, I would like to share with you is 

1. As per my application design, Am trying to do the loopback as per the below commands manually,  I face the error some times as per the logs shown below, but after the below errors as shown in the below logs, then again If I rerun manually it works fine

arecord -D VINL8 -f S16_LE | aplay -D VOUTL8 &

arecord -D VINR8 -f S16_LE | aplay -D VOUTR8 &

logs:

====

root@lifeline:/# arecord -D VINL8 -f S16_LE | aplay -D VOUTL8 &
[1] 1171
root@lifeline:/# ALSA lib /home/jenkins/amsdk-nightly-build/build-CORTEX_1/arago-tmp-external-linaro-toolchain/work/cortexa8t2hf-vfp-neon-oe-linux-gnueabi/alsa-lib/1.0.27.2-r0/alsa-lib-1.0.27.2/src/pcm/pcm_dsnoop.c:618:(snd_pcm_dsnoop_open) unable to open slave
arecord: main:722: audio open error: Invalid argument
aplay: playback:2715: read error

[1]+ Done(1) arecord -D VINL8 -f S16_LE | aplay -D VOUTL8
root@lifeline:/# arecord -D VINL8 -f S16_LE | aplay -D VOUTL8 &
[1] 1173
root@lifeline:/# Recording WAVE 'stdin' : Signed 16 bit Little Endian, Rate 8000 Hz, Mono
Playing WAVE 'stdin' : Signed 16 bit Little Endian, Rate 8000 Hz, Mono

root@lifeline:/# arecord -D VINR8 -f S16_LE | aplay -D VOUTR8 &
[2] 1175
root@lifeline:/# Recording WAVE 'stdin' : Signed 16 bit Little Endian, Rate 8000 Hz, Mono
Playing WAVE 'stdin' : Signed 16 bit Little Endian, Rate 8000 Hz, Mono

root@lifeline:/#

2. When I put the above commands in the init script during bootup instead of running the below commands manually

arecord -D VINL8 -f S16_LE | aplay -D VOUTL8 &

arecord -D VINR8 -f S16_LE | aplay -D VOUTR8 &

logs:

===

INIT: version 2.88 booting
Starting ifplugd service for dynamic IP assignment...
Starting udev[ 2.144510] net eth0: initializing cpsw version 1.12 (0)

[ 2.243122] net eth0: phy found : id is : 0x20005c90
[ 2.248501] net eth0: PHY already attached
[ 2.252915] net eth0: phy 4a101000.mdio:01 not found on slave 1
Starting system message bus: [ 2.388906] random: dbus-daemon urandom read with 61 bits of entropy available
Failed to start message bus: Failed to read directory "/etc/dbus-1/system.d": No such file or directory
dbus.
TUNSTALL INIT CONFIGURATIONS START
#################################################################
Running ntpdate to fetch current date and time from NTP server
##################################################################
GSM_PWR_ON_3V3
GSM_reset
Got NTP server, IP: 192.168.82.40
Configure PIN 50 as PWM PIN
ALSA: Restoring mixer settings...
GPIO pin =50
GPIO register data =0x6
[ 2.686421] GPIO 50 PHY address =0x44e10848
PWM LED CONFIGURATION
Vamp_C1 Configuration
Vamp_C2 Configuration
Stereo codec Configuration
Audio amplifier Configuration
1 Jan 00:19:58 ntpdate[616]: no servers can be used, exiting
[ 2.841950] udevd[624]: starting version 182
BATT_ON
Monocodec driver configuration
1 Jan 00:19:59 TUNSTALL INIT CONFIGURATIONS END
ntpdate[625]: no servers can be used, exiting
[ 2.989909] EXT4-fs (mmcblk0p3): re-mounted. Opts: data=ordered
Programming MAX9860 Registers
1 Jan 00:19:59 ntpdate[636]: no servers can be used, exiting
Failed to set ntpdate after 3 re-tries!!!
Simple mixer control 'Master',0
Capabilities: pvolume pvolume-joined
Playback channels: Mono
Limits: Playback 0 - 63
Mono: Playback 63 [100%]
Simple mixer control 'DC Filter Enable',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [on]
ALSA lib /home/jenkins/amsdk-nightly-build/build-CORTEX_1/arago-tmp-external-linaro-toolchain/work/cortexa8t2hf-vfp-neon-oe-linux-gnueabi/alsa-lib/1.0.27.2-r0/alsa-lib-1.0.27.2/src/pcm/pcm_dshare.c:643:(snd_pcm_dshare_open) The dshare plugin supports only playback stream
arecord: main:722: audio open error: Invalid argument
Recording WAVE 'stdin' : aplay: playback:2715: Signed 16 bit Little Endian, Rate 8000 Hz, Mono
Playing WAVE 'stdin' : Signed 16 bit Little Endian, Rate 8000 Hz, Mono
read error
urandom start: failed.
[ 4.241547] libphy: 4a101000.mdio:01 - Link is Up - 100/Full
[ 4.397655] remoteproc0: powering up wkup_m3
[ 4.422118] remoteproc0: Booting fw image am335x-pm-firmware.elf, size 154420
[ 4.430330] PM: CM3 Firmware Version = 0x190
[ 4.652189] remoteproc0: remote processor wkup_m3 is now up
[ 5.551042] random: nonblocking pool is initialized
[ 11.702275] EXT4-fs (mmcblk0boot0): mounted filesystem without journal. Opts: (null)
INIT: Entering runlevel: 5
Starting syslogd/klogd: [ 12.389608] EXT4-fs (mmcblk0p6): mounted filesystem with ordered data mode. Opts: (null)
done
[ 12.690036] EXT4-fs (mmcblk0p7): mounted filesystem with ordered data mode. Opts: (null)

lifeline login: root
root@lifeline:~# cd /

Kindly do the needful,

Many Thanks in advance

Dear Kemal,

Really appreciate for your efforts w.r.t this thread

For time being, Could you please help me in creating the script by adding the below two commands in that script & invoked during bootup,  so that inspite of these errors, whenever that error is reported, to rerun the below commands in that script, until it start to work, instead of running manually

arecord -D VINL8 -f S16_LE | aplay -D VOUTL8 &

arecord -D VINR8 -f S16_LE | aplay -D VOUTR8 &

Kindly do the needful as early as possible

Many Thanks in advance

Dear Kemal,

Could you please provide any updates w.r.t the above issue, as I am having release next week

Extremely sorry to push you hard once again

Kindly do the needful as early as possible

Many Thanks in advance

Could you check whether the issue is reproducible with the attached ALSA configuration file.

arecord -D LEFT | aplay -D RIGHT

https://e2e.ti.com/cfs-file/__key/communityserver-discussions-components-files/791/asound.conf

Dear Kemal,

Many Thanks a lot for your prompt support,

No problem, now it works for the first time, but if I give CTRL-C its reproducing the same errors, am not sure whether its right way of giving CTRL-C & more over in the above attached asound.conf, we have only two devices, but I require totally four devices ie., VINL, VINR VOUTR & VOUTL

root@lifeline:/# arecord -D LEFT | aplay -D RIGHT
ALSA lib /home/jenkins/amsdk-nightly-build/build-CORTEX_1/arago-tmp-external-linaro-toolchain/work/cortexa8t2hf-vfp-neon-oe-linux-gnueabi/alsa-lib/1.0.27.2-r0/alsa-lib-1.0.27.2/src/pcm/pcm_dshare.c:710:(snd_pcm_dshare_open) unable to open slave
aplay: main:722: audio open error: Invalid argument
Recording WAVE 'stdin' : Unsigned 8 bit, Rate 8000 Hz, Mono
root@lifeline:/# arecord -D LEFT | aplay -D RIGHT
ALSA lib /home/jenkins/amsdk-nightly-build/build-CORTEX_1/arago-tmp-external-linaro-toolchain/work/cortexa8t2hf-vfp-neon-oe-linux-gnueabi/alsa-lib/1.0.27.2-r0/alsa-lib-1.0.27.2/src/pcm/pcm_dshare.c:710:(snd_pcm_dshare_open) unable to open slave
aplay: main:722: audio open error: Invalid argument
Recording WAVE 'stdin' : Unsigned 8 bit, Rate 8000 Hz, Mono
root@lifeline:/# arecord -D LEFT | aplay -D RIGHT
Recording WAVE 'stdin' : Unsigned 8 bit, Rate 8000 Hz, Mono
Playing WAVE 'stdin' : Unsigned 8 bit, Rate 8000 Hz, Mono
^CAborted by signal Interrupt...
aplay: pcm_write:1939: write error: Interrupted system call
Aborted by signal Interrupt...
arecord: pcm_read:2031: read error: Interrupted system call
root@lifeline:/# arecord -D LEFT | aplay -D RIGHT
ALSA lib /home/jenkins/amsdk-nightly-build/build-CORTEX_1/arago-tmp-external-linaro-toolchain/work/cortexa8t2hf-vfp-neon-oe-linux-gnueabi/alsa-lib/1.0.27.2-r0/alsa-lib-1.0.27.2/src/pcm/pcm_dshare.c:710:(snd_pcm_dshare_open) unable to open slave
aplay: main:722: audio open error: Invalid argument
Recording WAVE 'stdin' : Unsigned 8 bit, Rate 8000 Hz, Mono
root@lifeline:/# arecord -D LEFT | aplay -D RIGHT
ALSA lib /home/jenkins/amsdk-nightly-build/build-CORTEX_1/arago-tmp-external-linaro-toolchain/work/cortexa8t2hf-vfp-neon-oe-linux-gnueabi/alsa-lib/1.0.27.2-r0/alsa-lib-1.0.27.2/src/pcm/pcm_dshare.c:710:(snd_pcm_dshare_open) unable to open slave
aplay: main:722: audio open error: Invalid argument
Recording WAVE 'stdin' : Unsigned 8 bit, Rate 8000 Hz, Mono
root@lifeline:/# arecord -D LEFT | aplay -D RIGHT

Kindly do the needful as early as possible

Awaiting for your replies,

Many Thanks in advance

Try to add this:

pcm.VOUTL8 {
	type asym
	playback.pcm "LEFT"
}

pcm.VOUTR8 {
	type asym
	playback.pcm "RIGHT"
}

pcm.VINL8 {
	type asym
	capture.pcm "LEFT"
}

pcm.VINR8 {
	type asym
	capture.pcm "RIGHT"
}

Dear Kemal,

Many Thanks a lot for your prompt responses & impressed by your prompt support

Will surely try the above configuration & keep you updated

I am facing one more issue Kemal, ie., overrrun & underrun, I hope this issue is due to improper definition of buffer_size in the ALSA application, inorder to fix this issue, am trying to define the buffer_size = period_size * periods correctly, am trying to understand the terminologies of the period_size & period

I am trying to define the buffer_size in alsa application, where buffer_size is calculated using period_size & periods

1. Could you please help me out to how to define the period_size & periods as per the below link w.r.t MCASP

FramesPeriods - AlsaProject
www.alsa-project.org

I am trying to find out how to calculate the buffer_size which is dependent on 2*period_size
But Still I don't understand what is don't understand what 'period_size' and a 'period' is?

I have even tried posting the query () but still am not convinced w.r.t the inputs provided in the above thread

As am configuring for the below parameters

Sound format : I2S

Sampling rate : 8Khz

Channels : Mono

16 bits per sample

BCLK = 250 Khz

MCLK = 2Mhz

2. For example , Could you also please explain, the below link, how & on what basis BUFF_SIZE to 4096 has been defined

processors.wiki.ti.com/.../Sitara_Linux_Audio_Sample_Application_Overview
#define BUFF_SIZE 4096

3. Could you please let me know on what basis & how these values are derived are they unique to eDMA buffers??

static const struct snd_pcm_hardware edma_pcm_hardware = {

29 .info = SNDRV_PCM_INFO_MMAP |

30 SNDRV_PCM_INFO_MMAP_VALID |

31 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME |

32 SNDRV_PCM_INFO_NO_PERIOD_WAKEUP |

33 SNDRV_PCM_INFO_INTERLEAVED,

34 .buffer_bytes_max = 128 * 1024,

35 .period_bytes_min = 512,

36 .period_bytes_max = 64 * 1024,

37 .periods_min = 2,

38 .periods_max = 19,

39 };

Could you also please help me in knowing how & on what basis the below values are derived, Hope this is in ALSA layer of Kernel & it is independent of EDMA??

static struct snd_pcm_hardware pcm_hardware_playback = {
66 .info = (SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER |
67 SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID |
68 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME|
69 SNDRV_PCM_INFO_BATCH),
70 .formats = DAVINCI_PCM_FMTBITS,
71 .rates = (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 |
72 SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 |
73 SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
74 SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000 |
75 SNDRV_PCM_RATE_KNOT),
76 .rate_min = 8000,
77 .rate_max = 96000,
78 .channels_min = 2,
79 .channels_max = 384,
80 .buffer_bytes_max = 128 * 1024,
81 .period_bytes_min = 32,
82 .period_bytes_max = 8 * 1024,
83 .periods_min = 16,
84 .periods_max = 255,
85 .fifo_size = 0,
86 };
87
88 static struct snd_pcm_hardware pcm_hardware_capture = {
89 .info = (SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER |
90 SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID |
91 SNDRV_PCM_INFO_PAUSE |
92 SNDRV_PCM_INFO_BATCH),
93 .formats = DAVINCI_PCM_FMTBITS,
94 .rates = (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 |
95 SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 |
96 SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
97 SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000 |
98 SNDRV_PCM_RATE_KNOT),
99 .rate_min = 8000,
100 .rate_max = 96000,
101 .channels_min = 2,
102 .channels_max = 384,
103 .buffer_bytes_max = 128 * 1024,
104 .period_bytes_min = 32,
105 .period_bytes_max = 8 * 1024,
106 .periods_min = 16,
107 .periods_max = 255,
108 .fifo_size = 0,
109 };

Kindly do the needful as early as possible

Many Thanks in advance