[alsa-devel] [PATCH v3 0/5] ALSA: hda - hdmi: ATI/AMD multi-channel and HBR support

[Andre Heider]

On Tue, Oct 29, 2013 at 12:42:12AM +0200, Anssi Hannula wrote:
> 29.10.2013 00:00, Andre Heider kirjoitti:
> > On Mon, Oct 28, 2013 at 10:35:56PM +0200, Anssi Hannula wrote:
> >> 28.10.2013 20:35, Andre Heider kirjoitti:
> >>> On Mon, Oct 28, 2013 at 08:25:22PM +0200, Anssi Hannula wrote:
> >>>> 28.10.2013 20:17, Andre Heider kirjoitti:
> >>>>> On Mon, Oct 28, 2013 at 08:12:43PM +0200, Anssi Hannula wrote:
> >>>>>> 28.10.2013 19:52, Andre Heider kirjoitti:
> >>>>>>> On Fri, Oct 25, 2013 at 08:23:48PM +0300, Anssi Hannula wrote:
> >>>>>>>> 25.10.2013 19:54, Andre Heider kirjoitti:
> >>>>>>>>> cat /proc/asound/card0/eld\#0.0
> >>>>>>>>> 	monitor_present		1
> >>>>>>>>> 	eld_valid		0
> >>>>>>>>
> >>>>>>>> However, this should have eld_valid=1 and contain more info. To get a
> >>>>>>>> hint on whether it is a bug in audio or video driver, could you give a
> >>>>>>>> log with CONFIG_SND_DEBUG ?
> >>>>>>>>
> >>>>>>>> AFAICS the sound git master tree should have the necessary support in
> >>>>>>>> the radeon video driver to allow the audio driver to generate a valid
> >>>>>>>> ELD with your card.
> >>>>>>>
> >>>>>>> With CONFIG_SND_DEBUG=y I get a bunch of
> >>>>>>> "HDMI ATI/AMD: no speaker allocation for ELD"
> >>>>>>> but afaics that's about it.
> >>>>>>
> >>>>>> Thanks, that is exactly what I was looking for.
> >>>>>>
> >>>>>> Looks like a radeon driver issue - it does not seem to setup the speaker
> >>>>>> allocation registers properly (so that ALSA could read them from there),
> >>>>>> and I verified that the EDID you posted has a valid speaker allocation
> >>>>>> byte 0x4f.
> >>>>>>
> >>>>>> Just to recheck - you are running sound git master, or something else?
> >>>>>
> >>>>> This is from 3.12-rc7 with today's sound/master (3fbdaf9b) merged on top.
> >>>>>
> >>>>
> >>>> Ah, OK, that certainly explains it. 3.12-x has this one:
> >>>> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/drivers/gpu/drm/radeon?id=555b1b651acf44bf27ebbb04235d38a8fd2d58dc
> >>>>
> >>>> Could you revert that for testing, just to see if you get proper ELD
> >>>> info then?
> >>>
> >>> Blergh, guess that's my fault for not just using sound/master.
> >>>
> >>> But that looks better:
> >>>
> >>> cat /proc/asound/card0/eld\#0.0
> >>> 	monitor_present		1
> >>> 	eld_valid		1
> >>> 	monitor_name		
> >>> 	connection_type		HDMI
> >>> 	eld_version		[0x2] CEA-861D or below
> >>> 	edid_version		[0x0] no CEA EDID Timing Extension block present
> >>> 	manufacture_id		0x0
> >>> 	product_id		0x0
> >>> 	port_id			0x0
> >>> 	support_hdcp		0
> >>> 	support_ai		0
> >>> 	audio_sync_delay	0
> >>> 	speakers		[0x4f] FL/FR LFE FC RL/RR RLC/RRC
> >>> 	sad_count		4
> >>> 	sad0_coding_type	[0x1] LPCM
> >>> 	sad0_channels		2
> >>> 	sad0_rates		[0x1ee0] 32000 44100 48000 88200 96000 176400 192000
> >>> 	sad0_bits		[0xe0000] 16 20 24
> >>
> >> Thanks.
> >>
> >> Hmm, seems we have bug in the radeon driver, we are missing the
> >> 8-channel PCM SAD here.
> >>
> >> Can you try the attached patch?
> > 
> > Sure, with that patch I get:
> > 
> > 	monitor_present		1
> > 	eld_valid		1
> > 	monitor_name		
> > 	connection_type		HDMI
> > 	eld_version		[0x2] CEA-861D or below
> > 	edid_version		[0x0] no CEA EDID Timing Extension block present
> > 	manufacture_id		0x0
> > 	product_id		0x0
> > 	port_id			0x0
> > 	support_hdcp		0
> > 	support_ai		0
> > 	audio_sync_delay	0
> > 	speakers		[0x4f] FL/FR LFE FC RL/RR RLC/RRC
> > 	sad_count		5
> > 	sad0_coding_type	[0x1] LPCM
> > 	sad0_channels		8
> > 	sad0_rates		[0x6e0] 32000 44100 48000 88200 96000
> > 	sad0_bits		[0xe0000] 16 20 24
> > 	sad1_coding_type	[0x1] LPCM
> > 	sad1_channels		2
> > 	sad1_rates		[0x1ee0] 32000 44100 48000 88200 96000 176400 192000
> > 	sad1_bits		[0xe0000] 16 20 24
> > 	sad2_coding_type	[0x2] AC-3
> > 	sad2_channels		8
> > 	sad2_rates		[0xe0] 32000 44100 48000
> > 	sad2_max_bitrate	640000
> > 	sad3_coding_type	[0x6] AAC-LC
> > 	sad3_channels		8
> > 	sad3_rates		[0xe0] 32000 44100 48000
> > 	sad3_max_bitrate	640000
> > 	sad4_coding_type	[0x7] DTS
> > 	sad4_channels		8
> > 	sad4_rates		[0xe0] 32000 44100 48000
> > 	sad4_max_bitrate	1536000
> 
> OK, looks good, I'll submit the patch to radeon people then.
> 
> > Those are supposed to be hardware capabilities, right? Because I'm
> > pretty sure this dated receiver doesn't support AAC bitstreams.
> 
> Yep. I did manually verify that your EDID really claims AAC support,
> though. It could be wrong I guess, and the reported max_bitrate is
> suspiciously the same as for AC-3.
> 
> If you want to try AAC bitstreaming, you can download this:
> http://onse.fi/files/testi.aac.lc.unconfirmed.spdif
> and play it back using:
> aplay -Dhdmi:CARD=Generic,DEV=0,AES0=6 -r44100 -f s16_le -c2 \
> 	testi.aac.lc.unconfirmed.spdif
> 
> (file unconfirmed as I don't have AAC HW)

That looks like its playing something, but there's no sound at all. The
receiver claims there's a Dolby Digital stream active while that aplay
command is running... so yeah, looks like the EDID is lying.
(Same with another raw AAC LE file I just googled).

But on the good side, multichannel AC3 and DTS passthrough is working
flawlessly with XBMC ;)

Thanks again,
Andre