Commit 0185a432 authored Mar 31, 2020 by 이경택 Committed by Greg Kroah-Hartman Apr 17, 2020

ASoC: dapm: connect virtual mux with default value



commit 3bbbb7728fc853d71dbce4073fef9f281fbfb4dd upstream.

Since a virtual mixer has no backing registers
to decide which path to connect,
it will try to match with initial state.
This is to ensure that the default mixer choice will be
correctly powered up during initialization.
Invert flag is used to select initial state of the virtual switch.
Since actual hardware can't be disconnected by virtual switch,
connected is better choice as initial state in many cases.

Signed-off-by: Gyeongtaek Lee <gt82.lee@samsung.com>
Link: https://lore.kernel.org/r/01a301d60731$b724ea10$256ebe30$@samsung.com


Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 66f493d9

sound/soc/soc-dapm.c

+7 −1

Original line number	Diff line number	Diff line
		@@ -792,7 +792,13 @@ static void dapm_set_mixer_path_status(struct snd_soc_dapm_path *p, int i,
		val = max - val;
		p->connect = !!val;
		} else {
		p->connect = 0;
		/* since a virtual mixer has no backing registers to
		* decide which path to connect, it will try to match
		* with initial state. This is to ensure
		* that the default mixer choice will be
		* correctly powered up during initialization.
		*/
		p->connect = invert;
		}
		}