On May 15, 2011, at 9:03 PM, Raymond Yau wrote:
2011/5/16 Jeremy Bush contractfrombelow@gmail.com
Hello-
I'm trying to get my Realtek ALC892 chip to work according to it's specifications over HDMI. The manufacturers site say it should be able to do 7.1+2 channels, 24bit audio and 192Khz sample rate.
7.1 is provided by 4 jack at rear panel ( green, black, orange and grey) 2 is provided by headphone at front panel
OK, so that has nothing to do with HDMI then.
However, it seems that the ALSA drivers (even the ones from the realtek website) limit the output to 2 channels, 16bit, 88.2KHz.
Here is my system information that you can see these results:
http://www.alsa-project.org/db/?f=5b55a63fea6580dfcbf1a85c7c734f977df798f1
I see the ALC892 as being supported in the ALSA changelog, but I don't see any model options in Documentation/HD-Audio-Models.txt. I'm currently using "options snd-hda-intel model=6stack-digout" (as I have 6-jack with a SPDIF out on the motherboard) but I'm not sure that is actually doing anything.
As your codec info does not have "Side Playback Channel" and "Side Playback Switch", it look like the model is used for 5stack motherboard which support 5.1
Do you hear any noise since Valerio reported noise appear when using the model=auto in
http://thread.gmane.org/gmane.linux.alsa.devel/84653/focus=84724
I'm not actually trying to get analog working or the front-panel output. Only surround sound over HDMI. I have tried model=auto and didn't notice anything different than specifying the model.
Is what I'm getting now the best I should expect over HDMI? I saw support in ALSA and bought the motherboard expecting it to be fully supported since the changelogs say support was added.
Codec: Intel CougarPoint HDMI
Address: 3 AFG Function Id: 0x1 (unsol 0) Vendor Id: 0x80862805 Subsystem Id: 0x80862805 Revision Id: 0x100000 No Modem Function Group found
Node 0x03 [Audio Output] wcaps 0x6611: 8-Channels Digital
Control: name="IEC958 Playback Con Mask", index=1, device=0 Control: name="IEC958 Playback Pro Mask", index=1, device=0 Control: name="IEC958 Playback Default", index=1, device=0 Control: name="IEC958 Playback Switch", index=1, device=0 Device: name="HDMI 0", type="HDMI", device=3 Converter: stream=8, channel=0 Digital: Enabled Digital category: 0x0 PCM: rates [0x7f0]: 32000 44100 48000 88200 96000 176400 192000 bits [0x1e]: 16 20 24 32 formats [0x5]: PCM AC3 Power states: D0 D3 EPSS Power: setting=D0, actual=D0
Node 0x06 [Pin Complex] wcaps 0x40778d: 8-Channels Digital Amp-Out CP Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1 Amp-Out vals: [0x00 0x00] Pincap 0x09000094: OUT Detect HBR HDMI DP Pin Default 0x18560020: [Jack] Digital Out at Int HDMI Conn = Digital, Color = Unknown DefAssociation = 0x2, Sequence = 0x0 Pin-ctls: 0x40: OUT Unsolicited: tag=06, enabled=1 Power states: D0 D3 EPSS Power: setting=D0, actual=D0 Connection: 1 0x03
So this seems to say I should be getting 7.1 over the HDMI output. What do I need to change in my config to actually get it? I tried messing around with /sys/class/sound/hwC1D3/user_pin_configs but I'm not sure what to change.
Jeremy