[pulseaudio-discuss] [PATCH 0/1] alsa: Make profiles' availability dynamic

[Bob Ham]

On Fri, 2016-02-19 at 13:32 +0800, Raymond Yau wrote:
> 2016-2-18 下午5:38於 "Bob Ham" <bob.ham at collabora.com>寫道：
> > 
> > Make ALSA profiles stick around and update their availability if
> > the
> > HDMI ELD changes.

> 1) mono is not supported by hda-intel

Is there some way to determine which profiles cannot ever be available?


> 2) those desktop with three jacks at rear panel need retasking input jacks
> to output jacks by changing control channel mode

What do you mean by "control channel mode"?  I don't know what you're
referring to.

> from 2ch to 6ch, you may
> need to add hook for alsa devices to change the channel mode in alsa
> HDA-Intel.conf

I don't understand how that would affect my patch, that sounds like an
issue in ALSA?


> 3) even HDMI codec support 8 channels, it still require your hdmi monitor
> support multi channels

Again, I'm not sure what you mean by "support multi channels".  The TV
we have supports two channels¸ which is "multi".  Here is the ELD as
reported by ALSA:

$ cat /proc/asound/NVidia/eld#0.0 
monitor_present         1
eld_valid               1
monitor_name            Panasonic-TV

connection_type         HDMI
eld_version             [0x2] CEA-861D or below
edid_version            [0x3] CEA-861-B, C or D
manufacture_id          0xa934
product_id              0xa296
port_id                 0x10000
support_hdcp            0
support_ai              0
audio_sync_delay        0
speakers                [0xffff] FL/FR LFE FC RL/RR RC FLC/FRC RLC/RRC
FLW/FRW FLH/FRH TC FCH
sad_count               1
sad0_coding_type        [0x1] LPCM
sad0_channels           2
sad0_rates              [0xe0] 32000 44100 48000
sad0_bits               [0x20000] 16

Are you saying that HDMI sinks are required to support more than two
channels?  If so, The Real World appears to be ignoring those
requirements.

-- 
Bob Ham <bob.ham at collabora.com>
Software Engineer

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