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ASoC: dapm: connect virtual mux with default value

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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>
This commit is contained in:
이경택 2020-03-31 16:55:16 +09:00 committed by Greg Kroah-Hartman
parent eef8609988
commit 559c37e5f2
1 changed files with 7 additions and 1 deletions
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8
sound/soc/soc-dapm.c
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@ -751,7 +751,13 @@ 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;
}
}