svn commit: r230130 - in head: share/man/man4 sys/conf
sys/dev/sound/pci/hda sys/modules/sound/driver/hda
Alexander Motin
mav at FreeBSD.org
Sun Jan 15 18:58:09 UTC 2012
On 15.01.2012 20:54, Niclas Zeising wrote:
> On 2012-01-15 14:21, Alexander Motin wrote:
>> Author: mav
>> Date: Sun Jan 15 13:21:36 2012
>> New Revision: 230130
>> URL: http://svn.freebsd.org/changeset/base/230130
>>
>> Log:
>> Major snd_hda driver rewrite:
>> - Huge old hdac driver was split into three independent pieces: HDA
>> controller driver (hdac), HDA CODEC driver (hdacc) and HDA sudio function
>> driver (hdaa).
>> - Support for multichannel recording was added. Now, as specification
>> defines, driver checks input associations for pins with sequence numbers
>> 14 and 15, and if found (usually) -- works as before, mixing signals
>> together. If it doesn't, it configures input association as multichannel.
>> - Signal tracer was improved to look for cases where several DACs/ADCs in
>> CODEC can work with the same audio signal. If such case found, driver
>> registers additional playback/record stream (channel) for the pcm device.
>> - New controller streams reservation mechanism was implemented. That
>> allows to have more pcm devices then streams supported by the controller
>> (usually 4 in each direction). Now it limits only number of simultaneously
>> transferred audio streams, that is rarely reachable and properly reported
>> if happens.
>> - Codec pins and GPIO signals configuration was exported via set of
>> writable sysctls. Another sysctl dev.hdaa.X.reconfig allows to trigger
>> driver reconfiguration in run-time.
>> - Driver now decodes pins location and connector type names. In some cases
>> it allows to hint user where on the system case connectors, related to the
>> pcm device, are located. Number of channels supported by pcm device,
>> reported now (if it is not 2), should also make search easier.
>> - Added workaround for digital mic on some Asus laptops/netbooks.
>>
>> MFC after: 2 months
>> Sponsored by: iXsystems, Inc.
>
> Just a question. Does this need any changes to the kernel config, such
> as adding different "device hdac" etc. or is the default device hda
> still ok?
Nothing changed there. `device snd_hda` and snd_hda kernel module
include all parts.
--
Alexander Motin
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