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>

diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c
index ebd785f9aa46cc2c96decbe5d470e11e92d64ece..e0ff40b10d855404cd7878795bccf410a841ff79 100644 (file)
--- a/sound/soc/soc-dapm.c
+++ b/sound/soc/soc-dapm.c
@@ -802,7 +802,13 @@ 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;
        }
 }