Hi Michael, >-----Original Message----- >From: Michael Forney [mailto:mforney@xxxxxxxxxxx] >Sent: Friday, May 26, 2017 12:10 PM >To: Yang, Libin <libin.yang@xxxxxxxxx> >Cc: Libin Yang <libin.yang@xxxxxxxxxxxxxxx>; alsa-devel@xxxxxxxxxxxxxxxx; >Pascal Wichmann <pascal.wichmann@xxxxxxx> >Subject: Re: Problems with the DP MST audio support patchset > >On Thu, May 25, 2017 at 1:21 AM, Michael Forney <mforney@xxxxxxxxxxx> >wrote: >> Hi, >> >> I recently updated my kernel to 4.11, and am experiencing similar >> problems as Pascal. I have a Skylake processor and DP output hooked up >> with a DP to HDMI cable to an Onkyo SR-606 receiver. >> >> I can't get audio to work at all through my receiver anymore. I tried >> both DTS and PCM audio files. I bisected it to the above mentioned >> commit 9152085defb6426ce8f9989ca27e4450daefbd89 (ALSA: hda - add DP >> MST audio support). >> >>>> Do you know if the DP MST audio mode is used in your case? >> >> I don't know what DP MST is or how to tell if I'm using it. However, I >> noticed that when it does work, `aplay -L` gives me >> >> hdmi:CARD=PCH,DEV=0 >> HDA Intel PCH, HDMI 0 >> HDMI Audio Output >> hdmi:CARD=PCH,DEV=1 >> HDA Intel PCH, HDMI 1 >> HDMI Audio Output >> >> and when it doesn't, I get >> >> hdmi:CARD=PCH,DEV=0 >> HDA Intel PCH, Generic Digital >> HDMI Audio Output > >Well, I noticed in my dmesg log for 4.11: > ><4>[ 1.201789] snd_hda_intel 0000:00:1f.3: Too many HDMI devices ><4>[ 1.201790] snd_hda_intel 0000:00:1f.3: Consider building the >kernel with CONFIG_SND_DYNAMIC_MINORS=y ><4>[ 1.201792] snd_hda_intel 0000:00:1f.3: Too many HDMI devices ><4>[ 1.201794] snd_hda_intel 0000:00:1f.3: Consider building the >kernel with CONFIG_SND_DYNAMIC_MINORS=y ><4>[ 1.201795] snd_hda_intel 0000:00:1f.3: Too many HDMI devices ><4>[ 1.201797] snd_hda_intel 0000:00:1f.3: Consider building the >kernel with CONFIG_SND_DYNAMIC_MINORS=y ><3>[ 1.202668] snd_hda_intel 0000:00:1f.3: control 3:0:0:ELD:0 is >already present ><4>[ 1.202737] snd_hda_codec_hdmi: probe of hdaudioC0D2 failed with >error -16 ><4>[ 1.204335] snd_hda_intel 0000:00:1f.3: Too many HDMI devices ><4>[ 1.204337] snd_hda_intel 0000:00:1f.3: Consider building the >kernel with CONFIG_SND_DYNAMIC_MINORS=y ><4>[ 1.204338] snd_hda_intel 0000:00:1f.3: Too many HDMI devices ><4>[ 1.204340] snd_hda_intel 0000:00:1f.3: Consider building the >kernel with CONFIG_SND_DYNAMIC_MINORS=y ><4>[ 1.204341] snd_hda_intel 0000:00:1f.3: Too many HDMI devices ><4>[ 1.204343] snd_hda_intel 0000:00:1f.3: Consider building the >kernel with CONFIG_SND_DYNAMIC_MINORS=y ><3>[ 1.205412] snd_hda_intel 0000:00:1f.3: control 3:0:0:ELD:0 is >already present ><4>[ 1.205464] snd_hda_codec_hdmi: probe of hdaudioC0D2 failed with >error -16 ><6>[ 1.205644] snd_hda_codec_generic hdaudioC0D2: ignore pin 0x7, >too many assigned pins ><6>[ 1.205648] snd_hda_codec_generic hdaudioC0D2: autoconfig for >Generic: line_outs=0 (0x0/0x0/0x0/0x0/0x0) type:line ><6>[ 1.205651] snd_hda_codec_generic hdaudioC0D2: speaker_outs=0 >(0x0/0x0/0x0/0x0/0x0) ><6>[ 1.205653] snd_hda_codec_generic hdaudioC0D2: hp_outs=0 >(0x0/0x0/0x0/0x0/0x0) ><6>[ 1.205655] snd_hda_codec_generic hdaudioC0D2: mono: >mono_out=0x0 ><6>[ 1.205656] snd_hda_codec_generic hdaudioC0D2: dig-out=0x5/0x6 ><6>[ 1.205658] snd_hda_codec_generic hdaudioC0D2: inputs: ><6>[ 1.207882] input: HDA Intel PCH Mic as >/devices/pci0000:00/0000:00:1f.3/sound/card0/input4 ><6>[ 1.207979] input: HDA Intel PCH Front Headphone as >/devices/pci0000:00/0000:00:1f.3/sound/card0/input5 ><6>[ 1.208070] input: HDA Intel PCH HDMI/DP,pcm=3 as >/devices/pci0000:00/0000:00:1f.3/sound/card0/input6 ><6>[ 1.208158] input: HDA Intel PCH HDMI/DP,pcm=7 as >/devices/pci0000:00/0000:00:1f.3/sound/card0/input7 ><6>[ 1.208246] input: HDA Intel PCH HDMI/DP as >/devices/pci0000:00/0000:00:1f.3/sound/card0/input8 ><6>[ 1.208335] input: HDA Intel PCH HDMI/DP as >/devices/pci0000:00/0000:00:1f.3/sound/card0/input9 ><6>[ 1.208441] input: HDA Intel PCH HDMI as >/devices/pci0000:00/0000:00:1f.3/sound/card0/input12 ><6>[ 1.208582] input: HDA Intel PCH HDMI as >/devices/pci0000:00/0000:00:1f.3/sound/card0/input13 ><4>[ 1.208700] ------------[ cut here ]------------ ><4>[ 1.208708] WARNING: CPU: 0 PID: 43 at fs/proc/generic.c:346 >proc_register+0xe9/0x110 ><4>[ 1.208709] proc_dir_entry 'card0/eld#2.0' already registered ><4>[ 1.208710] Modules linked in: ><4>[ 1.208715] CPU: 0 PID: 43 Comm: kworker/0:1 Not tainted 4.11.3+ #41 ><4>[ 1.208716] Hardware name: HP HP EliteDesk 800 G2 DM 35W/8055, >BIOS N21 Ver. 02.14 04/28/2016 ><4>[ 1.208721] Workqueue: events azx_probe_work ><4>[ 1.208723] Call Trace: ><4>[ 1.208729] dump_stack+0x4d/0x66 ><4>[ 1.208733] __warn+0xc6/0xe0 ><4>[ 1.208737] warn_slowpath_fmt+0x46/0x50 ><4>[ 1.208742] proc_register+0xe9/0x110 ><4>[ 1.208746] proc_create_data+0x71/0xc0 ><4>[ 1.208750] snd_info_register+0x66/0xd0 ><4>[ 1.208753] snd_info_register_recursive+0x5b/0x70 ><4>[ 1.208756] snd_info_register_recursive+0x46/0x70 ><4>[ 1.208759] snd_info_card_register+0x25/0xa0 ><4>[ 1.208764] snd_card_register+0x140/0x190 ><4>[ 1.208769] ? device_attach+0xb/0x10 ><4>[ 1.208773] ? snd_hda_codec_configure+0xb1/0x120 ><4>[ 1.208776] azx_probe_work+0x47d/0x860 ><4>[ 1.208778] ? azx_probe_work+0x47d/0x860 ><4>[ 1.208783] process_one_work+0x1ec/0x480 ><4>[ 1.208787] worker_thread+0x43/0x4d0 ><4>[ 1.208790] kthread+0x104/0x140 ><4>[ 1.208794] ? process_one_work+0x480/0x480 ><4>[ 1.208797] ? kthread_create_on_node+0x40/0x40 ><4>[ 1.208802] ret_from_fork+0x29/0x40 ><4>[ 1.208805] ---[ end trace 538d7309f1b9646f ]--- > >So I added CONFIG_SND_DYNAMIC_MINORS=y as suggested (previously it was >disabled based on the help text). That seemed to do the trick. So the audio works well? >However, the `proc_dir_entry 'card0/eld#2.0' already registered` warning >seems like it could be a bug despite this. > >I guess the problem was this new MST feature means that now I have 5 HDMI >outputs showing up, which is too many. Yes, in dynamic mode, there are 5 HDMI/DP outputs for the compatibility with pulseaudio. Regards, Libin > >Sorry for the noise. _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
