[alsa-devel] [RFC v3 7/7] ASoC: hdmi-codec: Add ELD control

[Jyri Sarha]

On 01/19/16 14:05, Takashi Iwai wrote:
> On Tue, 19 Jan 2016 13:00:05 +0100,
> Jyri Sarha wrote:
>>
>> On 01/12/16 17:38, Philipp Zabel wrote:
>>> Exporting the ELD bytes to userspace allows an application to select
>>> an appropriate audio format depending on the current capabilities of
>>> the connected HDMI sink device.
>>>
>>
>> This looks good, but I was unable to test it. Obviously amixer or
>> alsamixer is unable to show anything about an ELD mixer element,
>
> You can use amixer cget command to retrieve the information.
>
>> but
>> shouldn't there be something about it shown under /proc/asound/card0/,
>> or am I mistaken.
>
> It's specific to driver.  HD-audio has one, but it doesn't show the
> whole ELD but only parsed contents.
>
>

Thanks,
I managed the read the ELD bytes with:

amixer -c0 cget iface=PCM,name='ELD',device=0

And the numbers change a bit when I connect to a different TV, so:

Reviewed-by: Jyri Sarha <jsarha at ti.com>
Tested-by: Jyri Sarha <jsarha at ti.com>

Cheers,
Jyri