Copyright (c) 2008 Alexander Motin <mav@FreeBSD.org>
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$FreeBSD: head/share/man/man4/snd_hda.4 184229 2008-10-24 18:57:11Z mav $
.Dd October 24, 2008 .Dt SND_HDA 4 .Os .Sh NAME .Nm snd_hda .Nd "Intel High Definition Audio bridge device driver" .Sh SYNOPSIS To compile this driver into the kernel, place the following lines in your kernel configuration file: d -ragged -offset indent .Cd "device sound" .Cd "device snd_hda" .Ed
p Alternatively, to load the driver as a module at boot time, place the following line in .Xr loader.conf 5 : d -literal -offset indent snd_hda_load="YES" .Ed .Sh DESCRIPTION The High Definition (HD) Audio specification was developed by Intel as the logical successor of the old AC'97 specification and has several advantages, such as higher bandwidth which allows more channels and more detailed formats, support for several logical audio devices, and general purpose DMA channels.
p The .Nm driver is a HDA bus controller driver and HDA codecs audio functions bridge driver that allows the generic audio driver, .Xr sound 4 , to be used with this hardware. .Nm only supports audio functions. Modem, HDMI and other possible functions are not implemented.
p The .Nm driver supports hardware that conforms with revision 1.0 of the Intel High Definition Audio specification and tries to behave much like the Microsoft Universal Audio Architecture (UAA) draft (revision 0.7b) for handling audio devices.
p According to HDA and UAA specifications, depending on number of HDA buses and codecs present in system, their audio capabilities and BIOS provided configuration, the .Nm driver often provides several PCM audio devices. For example, one device for main rear 7.1 output and inputs, one device for independent headset connectors at front and one device for SPDIF or HDMI audio input/output. Usually that assignment may be widely tuned by using device hints. A lot of useful information about driver operation and present audio setup may be obtained from the driver verbose boot messages.
p You can select audio device to use by default with hw.snd.default_unit sysctl described in .Xr sound 4 or explicitly specify it in appliation settings. .Ss Boot-time Configuration The following variables are available at boot-time through the .Xr device.hints 5 file: l -tag -width ".Va hint.hdac.%d.config"-offset indent t Va hint.hdac.%d.config Configures a range of possible options. Possible values are: .Dq Li dmapos , .Dq Li eapdinv , .Dq Li gpio0 , .Dq Li gpio1 , .Dq Li gpio2 , .Dq Li gpio3 , .Dq Li gpio4 , .Dq Li gpio5 , .Dq Li gpio6 , .Dq Li gpio7 , .Dq Li gpioflush , .Dq Li ivref , .Dq Li ivref50 , .Dq Li ivref80 , .Dq Li ivref100 , .Dq Li fixedrate , .Dq Li forcestereo , .Dq Li ovref , .Dq Li ovref50 , .Dq Li ovref80 , .Dq Li ovref100 , .Dq Li senseinv , .Dq Li softpcmvol , and .Dq Li vref . An option prefixed with .Dq Li no , such as .Dq Li nofixedrate , will do the opposite and takes precedence. Options can be separated by whitespace and commas. GPIO is a codecs General Purpose I/O pins which system integrators sometimes use to control external muters, amplifiers and so on. If you have no sound or sound volume is not adequate you may need to find a GPIO combination required for your system. ivrefX/ovrefX options controls voltage used to power external microphones and so on. t Va hint.hdac.%d.msi Controls MSI (Message Signaled Interrupts) support. t Va hint.hdac.%d.cad%d.nid%d.config Overrides codec pin configuration set by BIOS. May be specified as a 32bit HEX value with a leading "0x" or as a set of space separated "option=value" pairs. .El
p Pin configuration is the UAA driver's main source of information about codec usage. This information is usually provided by the codec manufacturer and tuned by system integrators for specific system requirements. The .Nm driver allows users to override it to fix integrator mistakes or to use codec in alternative ways, for example, to get stereo output and 2 inputs instead of a single 5.1 output. Configuration includes the following options: l -tag -width ".Va device=" -offset indent t Va as Association number. Associations are used to group individual pins to form a complex multipin device. For example, to group 4 connectors for 7.1 output or to treat several input connectors as sources for the same input device. Can be specified as number from 0 to 15. Association number 0 means disabled pin, number 15 is a set of independent unassociated pins. Each association includes only pins of the same direction (in/out) and detected atomically - all pins or none. For every pair of input+output associations in order of their numeration separate PCM audio device is created. t Va seq Sequence number. This unique inside every association number used to order pins inside association. Can be specified as a number from 0 to 15. Sequence number 15 for output associations has also special meaning. Output pin with sequence number 15 and device type Headhones will duplicate (with automatic mute if jack detection is supported) the first pin in that association. t Va device Device type. Can be specified as a number from 0 to 15 or as a name: .Dq Li Line-out , .Dq Li Speaker , .Dq Li Headphones, .Dq Li CD , .Dq Li SPDIF-out , .Dq Li Digital-out , .Dq Li Modem-line , .Dq Li Modem-handset , .Dq Li Line-in , .Dq Li AUX , .Dq Li Mic , .Dq Li Telephony , .Dq Li SPDIF-in , .Dq Li Digital-in , .Dq Li Res.E , or .Dq Li Other . The device type also describes the pin direction (in/out). For example, .Dq Li CD always means input pin, while .Dq Li Headphones always means output. t Va conn Connection type. Can be specified as a number from 0 to 3 or as a name: .Dq Li Jack , .Dq Li None , .Dq Li Fixed , or .Dq Li Both . Pins with .Dq Li None connection type are disabled. t Va ctype Connector physical type. Can be specified as a number from 0 to 15. This is a reference only value which is ignored by the driver. t Va color Connector color. Can be specified as a number from 0 to 15 or as a name: .Dq Li Unknown , .Dq Li Black , .Dq Li Grey , .Dq Li Blue , .Dq Li Green , .Dq Li Red , .Dq Li Orange , .Dq Li Yellow , .Dq Li Purple , .Dq Li Pink , .Dq Li Res.A , .Dq Li Res.B , .Dq Li Res.C , .Dq Li Res.D , .Dq Li White , or .Dq Li Other . This is a reference only value which is ignored by the driver. t Va loc Connector physical location. Can be specified as a number from 0 to 63. This is a reference only value which is ignored by the driver. t Va misc Misc bits. Can be specified as a number from 0 to 15. Bit 0, if set, tells that jack detection on this pin supported by the codec is not implemented in hardware. .El .Ss Runtime Configuration The following .Xr sysctl 8 variables are available in addition to those available to all .Xr sound 4 devices: l -tag -width ".Va dev.hdac.%d.polling" -offset indent t Va dev.hdac.%d.polling Enables polling mode, where the driver operates by querying the device state on timer ticks using .Xr callout 9 instead of interrupts. Polling is disabled by default. Do not enable it unless you are facing weird interrupt problems or if the device cannot generate interrupts at all. t Va dev.hdac.%d.polling_interval Controller/Jack Sense polling interval (1-1000 ms) t Va dev.hdac.%d.pindump Setting this to a non-zero value dumps the current pin configuration, main capabilities and jack sense status to console and syslog. .El .Sh EXAMPLES Taking HP Compaq DX2300 with Realtek ALC888 HDA codec for example. It has two audio connectors on a front side, three audio connectors on a rear side and one internal speaker. Codec has five stereo DACs and two ADCs, all are routable to any pin. All codec pins are reversible.
p Driver reports such default pin configuration when verbose messages enabled: d -literal hdac0: nid 20 0x01014020 as 2 seq 0 Line-out Jack jack 1 loc 1 color Green misc 0 hdac0: nid 21 0x99130110 as 1 seq 0 Speaker Fixed jack 3 loc 25 color Unknown misc 1 hdac0: nid 22 0x411111f0 as 15 seq 0 Speaker None jack 1 loc 1 color Black misc 1 hdac0: nid 23 0x411111f0 as 15 seq 0 Speaker None jack 1 loc 1 color Black misc 1 hdac0: nid 24 0x01a19830 as 3 seq 0 Mic Jack jack 1 loc 1 color Pink misc 8 hdac0: nid 25 0x02a1983f as 3 seq 15 Mic Jack jack 1 loc 2 color Pink misc 8 hdac0: nid 26 0x01813031 as 3 seq 1 Line-in Jack jack 1 loc 1 color Blue misc 0 hdac0: nid 27 0x0221401f as 1 seq 15 Headphones Jack jack 1 loc 2 color Green misc 0 hdac0: nid 28 0x411111f0 as 15 seq 0 Speaker None jack 1 loc 1 color Black misc 1 hdac0: nid 30 0x411111f0 as 15 seq 0 Speaker None jack 1 loc 1 color Black misc 1 hdac0: nid 31 0x411111f0 as 15 seq 0 Speaker None jack 1 loc 1 color Black misc 1 .Ed
p Pins with nid 21,23,28,30 and 31 are disabled due to "None" connectivity, so total pin count matches - six. All present pins by default are grouped into 3 associations: d -literal hdac0: Association 0 (1) out: hdac0: Pin nid=21 seq=0 hdac0: Pin nid=27 seq=15 hdac0: Association 1 (2) out: hdac0: Pin nid=20 seq=0 hdac0: Association 2 (3) in: hdac0: Pin nid=24 seq=0 hdac0: Pin nid=26 seq=1 hdac0: Pin nid=25 seq=15 .Ed
p It means that by default pcm0 device will play to the internal speaker and headphones jack with speaker automute on headphones connection. Recording on pcm0 will go from two external microphones and line-in jack. pcm1 playback will go to the Line-out jack. .Ss Example 1 Setting d -literal hint.hdac.0.cad0.nid20.config="as=1" hint.hdac.0.cad0.nid21.config="as=2" .Ed
p will swap line-out and speaker functions. So pcm0 device will play to the line-out and headphones jacks with line-out automute on headphones connection. Recording on pcm0 will go from two external microphones and line-in jacks. pcm1 playback will go to the internal speaker.
p .Ss Example 2 Setting d -literal hint.hdac.0.cad0.nid20.config="as=1 seq=15 device=Headphones" hint.hdac.0.cad0.nid27.config="as=2 seq=0" hint.hdac.0.cad0.nid25.config="as=4 seq=0" .Ed
p will split headphones and one of mics to separate device. So pcm0 device will play to the internal speaker and line-out jack with speaker automute on line-out connection. Recording on pcm0 will go from one external microphone and line-in jacks. pcm1 will be completely dedicated to headset (headphones and mic) connected to the front connectors.
p .Ss Example 3 Setting d -literal hint.hdac.0.cad0.nid20.config="as=1 seq=0" hint.hdac.0.cad0.nid26.config="as=2 seq=0" hint.hdac.0.cad0.nid27.config="as=3 seq=0" hint.hdac.0.cad0.nid25.config="as=4 seq=0" hint.hdac.0.cad0.nid24.config="as=5 seq=0 device=Line-out" hint.hdac.0.cad0.nid21.config="as=6 seq=0" .Ed
p will give 4 independent devices: pcm0 - line-out + line-in, pcm1 - headphones + mic, pcm2 - additional line-out via retasked rear mic jack, pcm3 - internal speaker.
p .Ss Example 4 Setting d -literal hint.hdac.0.cad0.nid20.config="as=1 seq=0" hint.hdac.0.cad0.nid24.config="as=1 seq=1 device=Line-out" hint.hdac.0.cad0.nid26.config="as=1 seq=2 device=Line-out" hint.hdac.0.cad0.nid21.config="as=2 seq=0" .Ed
p will give 2 devices: pcm0 - 5.1 playback via 3 rear (line-out and retasked mic and line-in) connectors and front headphones with rear connectors automute on headphones connection + front mic recording. pcm1 - internal speaker playback. .Sh HARDWARE The .Nm driver supports the following audio chipsets:
p l -bullet -compact t ATI SB450 t ATI SB600 t Intel 631x/632xESB t Intel 82801F t Intel 82801G t Intel 82801H t Intel 82801I t nVidia MCP51 t nVidia MCP55 t nVidia MCP61A t nVidia MCP61B t nVidia MCP65A t nVidia MCP65B t nVidia MCP67A t nVidia MCP67B t SiS 966 t VIA VT8251/8237A .El
p Generic audio chipsets compatible with the Intel HDA specification should work, but have not been verified yet. The following codecs have been verified to work:
p l -bullet -compact t Analog Devices AD1981HD t Analog Devices AD1983 t Analog Devices AD1984 t Analog Devices AD1986A t Analog Devices AD1988 t Analog Devices AD1988B t CMedia CMI9880 t Conexant Venice t Conexant Waikiki t Realtek ALC260 t Realtek ALC262 t Realtek ALC268 t Realtek ALC660 t Realtek ALC861 t Realtek ALC861VD t Realtek ALC880 t Realtek ALC882 t Realtek ALC883 t Realtek ALC885 t Realtek ALC888 t Realtek ALC889 t Sigmatel STAC9205 t Sigmatel STAC9220 t Sigmatel STAC9220D / 9223D t Sigmatel STAC9221 t Sigmatel STAC9221D t Sigmatel STAC9227D t Sigmatel STAC9227X t Sigmatel STAC9228D t Sigmatel STAC9228X t Sigmatel STAC9229D t Sigmatel STAC9229X t Sigmatel STAC9230D t Sigmatel STAC9230X t Sigmatel STAC9271D t Sigmatel STAC9872AK t VIA VT1708 t VIA VT1709 .El .Sh SEE ALSO .Xr sound 4 , .Xr device.hints 5 , .Xr loader.conf 5 , .Xr sysctl 8 .Sh HISTORY The .Nm device driver first appeared in .Fx 6.3 . .Sh AUTHORS .An -nosplit The .Nm driver was written by .An Stephane E. Potvin Aq sepotvin@videotron.ca , .An Ariff Abdullah Aq ariff@FreeBSD.org and .An Alexander Motin Aq mav@FreeBSD.org . This manual page was written by .An Joel Dahl Aq joel@FreeBSD.org and .An Alexander Motin Aq mav@FreeBSD.org . .Sh BUGS A few Hardware/OEM vendors tend to screw up BIOS settings, thus rendering the .Nm driver useless, which usually results in a state where the .Nm driver seems to attach and work, but without any sound.
p Due to OSS limitation multichannel (not multidevice) playback is not supported.