[alsa-devel] [PATCH 02/11] ucm: docs: Add JackType value

[Jaroslav Kysela]

Dne 11. 11. 19 v 14:39 Jaroslav Kysela napsal(a):
> Dne 07. 11. 19 v 2:57 Curtis Malainey napsal(a):
>> Identifies the type of jack and how it should be accessed
>>
>> Signed-off-by: Curtis Malainey <cujomalainey at chromium.org>
>> ---
>>    include/use-case.h | 3 +++
>>    1 file changed, 3 insertions(+)
>>
>> diff --git a/include/use-case.h b/include/use-case.h
>> index 2051bd40..3208cc30 100644
>> --- a/include/use-case.h
>> +++ b/include/use-case.h
>> @@ -322,6 +322,9 @@ int snd_use_case_get_list(snd_use_case_mgr_t *uc_mgr,
>>     *        configuration that doesn't belong to UCM configuration files.
>>     *   - JackName
>>     *      - Input name is the input device name for the jack
>> + *   - JackType
>> + *      - Specifies whether the jack is accessed via hctl or gpio and therefore
>> + *        only carries the possible values of "gpio" or "hctl"
>>     */
>>    int snd_use_case_get(snd_use_case_mgr_t *uc_mgr,
>>                         const char *identifier,
>>
> 
> What is meant with the "gpio" type? The standard input device interface? I
> believe it should be "inputdev" and "ctl" (hctl is just interface on top of
> ctl and the application can access the jack through snd_ctl functions, too.

I see (when I was cleaning this extra Chrome stuff in the ucm profiles) that 
it's related to the gpio (general purpose i/o pin interface) in the linux 
kernel. The JackSwitch is probably also related and defines the pin number 
where the application should watch for the jack state. In this case, it would 
be probably more nice to follow the JackControl and JackDev and define the pin 
number through JackGPIO or something like that. We will cover all three 
posibilities: ALSA control interface, Input interface, GPIO interface .

					Jaroslav

-- 
Jaroslav Kysela <perex at perex.cz>
Linux Sound Maintainer; ALSA Project; Red Hat, Inc.