linux-kernel - Re: [PATCH 1/4] ALSA: hda - hdmi: Add ATI/AMD multi-channel audio support

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Date:	Wed, 30 Oct 2013 17:59:01 +0200
From:	Anssi Hannula <anssi.hannula@....fi>
To:	Rafał Miłecki <zajec5@...il.com>
Cc:	Takashi Iwai <tiwai@...e.de>, alsa-devel@...a-project.org,
	Peter Frühberger <fritsch@...c.org>,
	Olivier Langlois <olivier@...llion01.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/4] ALSA: hda - hdmi: Add ATI/AMD multi-channel audio  support

Rafał Miłecki kirjoitti 2013-10-30 17:35:
> 2013/10/1 Anssi Hannula <anssi.hannula@....fi>:
> ATI/AMD codecs do not support all the standard HDA HDMI/DP functions,
> instead various vendor-specific verbs are provided.
> 
> I've just tried my HD6970M (BARTS, DCE5) in my Samsung NP700G7A-S01PL.
> 
> cat /proc/asound/card1/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 [0x5f] FL/FR LFE FC RL/RR RC RLC/RRC
> sad_count 6
> sad0_coding_type [0x1] LPCM
> sad0_channels 8
> sad0_rates [0x1ee0] 32000 44100 48000 88200 96000 176400 192000
> sad0_bits [0xe0000] 16 20 24
> sad1_coding_type [0x2] AC-3
> sad1_channels 6
> sad1_rates [0xe0] 32000 44100 48000
> sad1_max_bitrate 640000
> sad2_coding_type [0x7] DTS
> sad2_channels 6
> sad2_rates [0x6c0] 44100 48000 88200 96000
> sad2_max_bitrate 1536000
> sad3_coding_type [0xa] E-AC-3/DD+ (Dolby Digital Plus)
> sad3_channels 8
> sad3_rates [0xc0] 44100 48000
> sad4_coding_type [0xb] DTS-HD
> sad4_channels 8
> sad4_rates [0x1ec0] 44100 48000 88200 96000 176400 192000
> sad5_coding_type [0xc] MLP (Dolby TrueHD)
> sad5_channels 8
> sad5_rates [0x1ec0] 44100 48000 88200 96000 176400 192000
> 
> Command:
> speaker-test -D hdmi:CARD=Generic,DEV=0 -c8 -r192000 -F S16_LE
> works, I just have 5.1 (not 7.1), so Side left goes to the Read left
> and Side right goes to the Rear right. But they were working!

Good :)

BTW, there is a newer version (which was actually applied) of this 
patchset in alsa-devel@, seems you were missing from CC on that one.

> Next I've used howto from
> http://phoronix.com/forums/showthread.php?27348-TrueHD-DTS-HD-E-AC3-Over-HDMI-On-Linux
> to test DTS MA and TrueHD.
> 
> In the file from howto I've used:
> card Generic
> and then tested:
> 
> zajec@...ux-samsung700g7a:~> aplay -D hdmihdtest0 -c8 -fs16_le
> -r192000 thd.spdif
> Playing raw data 'thd.spdif' : Signed 16 bit Little Endian, Rate
> 192000 Hz, Channels 8
> zajec@...ux-samsung700g7a:~> aplay -D hdmihdtest0 -c8 -fs16_le
> -r192000 dts.spdif
> Playing raw data 'dts.spdif' : Signed 16 bit Little Endian, Rate
> 192000 Hz, Channels 8

For the record, the "howto" is mostly a workaround for missing 
DEV=[1..3] on (now) very old systems, instead of messing around with 
asoundrc you can just use "-D hdmi:CARD=Generic,DEV=0,AES0=6" instead of 
-DhdmihdtestX. (in AES0 the 0x2 is non-PCM flag, 0x4 is non-copyright 
flag IIRC - ALSA default is 0x4).

> Hooray! I got
> DOLBY HD
> and
> DTS-HD MA
> on my Denon 1912 display!
> 
> Now the main question... do you have any experience on using DTS-HD MA
> (or TrueHD) with mplayer? :|

Nope (well, any that I still remember). Support is there, though, so I 
guess it should work.

-- 
Anssi Hannula

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