kernel/include/sound/jack.h, branch linux-4.15.y

ALSA: jack: Allow building the jack layer without input device

2016-02-23T08:03:07Z

Since the recent integration of kctl jack and input jack layers, we can basically build the jack layer even without input devices. That is, the jack layer itself can be built with conditional to enable the input device support or not, while the users may enable always CONFIG_SND_JACK unconditionally. For achieving it, this patch changes the following: - A new Kconfig, CONFIG_SND_JACK_INPUT_DEV, was introduced to indicate whether the jack layer supports the input device, - A few items in snd_jack struct and relevant codes are conditionally built upon CONFIG_SND_JACK_INPUT_DEV, - The users of CONFIG_SND_JACK drop the messy dependency on CONFIG_INPUT. This change also automagically fixes a potential bug in HD-audio driver Arnd reported, where the NULL or uninitialized jack instance is dereferenced. Reported-by: Arnd Bergmann Acked-by: Arnd Bergmann Signed-off-by: Takashi Iwai

ALSA: jack: extend snd_jack_new to support phantom jack

2015-04-27T19:37:41Z

Dont create input devices for phantom jacks. Here, we extend snd_jack_new() to support phantom jack creating: pass in a bool param for [non-]phantom flag, and a bool param initial_jack to indicate whether we need to create a kctl at this stage. We can also add a kctl to the jack after its created meaning we can now integrate the HDA and ASoC jacks. Signed-off-by: Jie Yang Signed-off-by: Takashi Iwai

ALSA: jack: implement kctl creating for jack devices

2015-04-27T19:37:40Z

Currently the ALSA jack core registers only input devices for each jack registered. These jack input devices are not readable by userspace devices that run as non root. This patch series will implement kctls inside the core jack part, including kctls creating, status changing report, for both HD-Audio and ASoC jack. This allows non root userspace to read jack status and act on it. This patch adds a new API called snd_jack_add_new_kctl(), which will create a kcontrol, add it to the card, and also attach it to the jack kctl list. This patch also initialises the jack kctl list after jack is newed, and reports kctl status when jack insertion/removal events occur. snd_jack_new() is updated in the following patches to also support creating phantom jacks and jack kcontrols. We then remove these duplicated features from HDA jack and have jack kctls handled by core throughout HDA and ASoC. Signed-off-by: Liam Girdwood Modified-by: Jie Yang Signed-off-by: Jie Yang Reveiwed-by: Mark Brown Signed-off-by: Takashi Iwai

ALSA: jack: Add dummy snd_jack_set_key() definition

2014-12-08T14:44:47Z

For fixing a build error with CONFIG_SND_JACK=n sound/soc/codecs/ts3a227e.c:223:2: error: implicit declaration of function ‘snd_jack_set_key’ [-Werror=implicit-function-declaration] Signed-off-by: Takashi Iwai

ALSA: doc: Fix enum snd_jack_types comments

2014-10-29T07:20:46Z

Follow the proper kerneldoc rule, and complete enum item comments. Signed-off-by: Takashi Iwai

ALSA: jack: Fix kerneldoc comments

2014-10-28T14:47:30Z

Signed-off-by: Takashi Iwai

ALSA: Use a define for the number of jack switch types

2012-02-27T16:34:44Z

This is intended to facilitate the merge of the two jack detection mechanisms. Signed-off-by: Mark Brown Signed-off-by: Takashi Iwai

ALSA: jack - Add "Line In" input jack constants

2011-10-05T15:22:04Z

Similar to Line Out, these constants form the base for future patches enabling input jack reporting for Line in jacks. Signed-off-by: David Henningsson Acked-by: Mark Brown Signed-off-by: Takashi Iwai

ALSA: Add more jack button slots

2010-09-07T06:04:38Z

Some devices have more flexible microphone detection and can detect a wider range of buttons. Signed-off-by: Mark Brown Signed-off-by: Takashi Iwai

ALSA: Add support for key reporting via the jack interface

2010-03-17T18:10:46Z

Some devices provide support for detection of a small number of buttons on their jacks. One common implementation provides a single button, implemented by shorting the microphone to ground and detected along with microphone presence detection by detecting varying current draws on the microphone bias signal. Provide support for up to three buttons via the jack interface. These default to reporting BTN_n but an API is provided to allow these to be remapped to other keys by the machine driver where it knows what the keys are. More keys can be added with ease if required. This is only intended to support simple accessory button designs. If the interface is limiting then either creating a child device for the accessory or accessing the input device in the jack directly is recommended. Signed-off-by: Mark Brown