[alsa-devel] DM365 McBSP as Master

Appalayagari Sreedhar sreecha01 at gmail.com
Mon Oct 17 15:26:22 CEST 2011

Hi Clemens,

Thank you very much. but for the tlv320aic3x codec it works.
tlv320aic3x device is also duplex device. and also after aplay
calling, i can succesfully open the device for my codec driver.
could you please tell me what i am missing  and also why it is working
for the tlv320aic3x device.

Thank you,

On 10/17/11, Clemens Ladisch <clemens at ladisch.de> wrote:
> Clemens
> Regards,
> implementations; you should open the device twice.
> the device in full duplex mode.  This is not supported by most OSS
> O_RDWR indicates that you want to use the same file handle to use
> Appalayagari Sreedhar wrote:
>> root at dm368-evm:/# ./myoss
>> Audio Driver failed to open, oss_fd = -1 errno = 22
>> On 10/17/11, Appalayagari Sreedhar <sreecha01 at gmail.com> wrote:
>>> i found that if i open the device O_WRONLY and O_RDONLY mode it works.
>>> if i try to open the device using the O_RDWR mode it fails.

More information about the Alsa-devel mailing list