[PATCH] ALSA: core: sysfs: show components string

[Jaroslav Kysela]

Dne 24. 03. 20 v 14:15 Pierre-Louis Bossart napsal(a):
> 
> 
> On 3/24/20 4:01 AM, Takashi Sakamoto wrote:
>> On Tue, Mar 24, 2020 at 12:12:15AM -0500, Pierre-Louis Bossart wrote:
>>> when people report that their microphone is not reported by PulseAudio/UCM,
>>> it's very helpful to know what UCM was supposed to use in the first place.
>>> We don't have a debugger or step-by-step mechanisms to figure out what the
>>> configurations are.
>>
>> If I get your intension correctly, the addition of sysfs node is just to
>> investigate which use-case configuration is applied in cases that people
>> get issues. If so, it's really exaggerative in a point of the concept of
>> sysfs.
>>
>> I have two alternatives. If it's possible to focus on ALSA SoC part only,
>> addition of node to debugfs is reasonable for this purpose.
>>
>> Another alternative is to change output of 'cards' node of procfs. The
>> latter is commonly available for all cases. For example:
> 
> I initially wanted to use /proc but thought it was a thing from the past
> so I looked at sysfs. If this is the recommendation I don't mind using it.
> 
> debugsfs is not something the average user is familiar with, and it's
> not available in all cases. I'd like to extend existing pieces of
> information than add new things.

I won't modify /proc/asound/cards in this case, but create a per card file 
like /proc/asound/card#/components .

				Thanks,
					Jaroslav

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