Hi,
On 03-11-17 12:24, Mark Brown wrote:
On Fri, Nov 03, 2017 at 09:41:29AM +0100, Hans de Goede wrote:
So I was wondering if there is a way to have a headphone
switch without tying it to a card, while userspace will
still know what to do ?
You can make a GPIO input device but obviously can't have anything
reporting through the sound card interface without a sound card.
Ok, so I could make the driver generate evdev events
of type EV_SW with code SW_HEADPHONE_INSERT. Does userspace
do anything useful with this like automatically switching
between headphones and speakers as a headphone-jack which
is part of the sound card would do ?
If not, then is there a way to get a list of registered
soundcards from a driver, then pick one of the cards
based on some heuristics and then do the snd_soc_card_jack_new,
etc. on the picked card?
I assume that the approach from:
https://github.com/me176c-dev/kernel_asus_me176c/commit/498116d7e7b4718fa0655c4879e59a163b1dd85b
Where the struct snd_soc_card byt_rt5640_card is made
non-static and exported is not acceptable ?
Regards,
Hans
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