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authorMark Brown <broonie@opensource.wolfsonmicro.com>2013-02-22 17:48:15 +0000
committerMark Brown <broonie@opensource.wolfsonmicro.com>2013-02-25 13:51:22 +0000
commit8af294b472067e9034fe288d912455cc0961d1b9 (patch)
treeb066db8681e6220a3b8ddbc83d2f820a7450fb4e /sound/soc
parent19f949f52599ba7c3f67a5897ac6be14bfcb1200 (diff)
downloadop-kernel-dev-8af294b472067e9034fe288d912455cc0961d1b9.zip
op-kernel-dev-8af294b472067e9034fe288d912455cc0961d1b9.tar.gz
ASoC: dapm: Fix handling of loops
Currently if a path loops back on itself we correctly skip over it to avoid going into an infinite loop but this causes us to ignore the need to power up the path as we don't count the loop for the purposes of counting inputs and outputs. This means that internal loopbacks within a device that have powered devices on them won't be powered up. Fix this by treating any path that is currently in the process of being recursed as having a single input or output so that it is counted for the purposes of power decisions. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>
Diffstat (limited to 'sound/soc')
-rw-r--r--sound/soc/soc-dapm.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c
index 258acad..f325551 100644
--- a/sound/soc/soc-dapm.c
+++ b/sound/soc/soc-dapm.c
@@ -821,6 +821,7 @@ static int is_connected_output_ep(struct snd_soc_dapm_widget *widget,
(widget->id == snd_soc_dapm_line &&
!list_empty(&widget->sources))) {
widget->outputs = snd_soc_dapm_suspend_check(widget);
+ path->walking = 0;
return widget->outputs;
}
}
@@ -831,6 +832,9 @@ static int is_connected_output_ep(struct snd_soc_dapm_widget *widget,
if (path->weak)
continue;
+ if (path->walking)
+ return 1;
+
if (path->walked)
continue;
@@ -838,6 +842,7 @@ static int is_connected_output_ep(struct snd_soc_dapm_widget *widget,
if (path->sink && path->connect) {
path->walked = 1;
+ path->walking = 1;
/* do we need to add this widget to the list ? */
if (list) {
@@ -847,11 +852,14 @@ static int is_connected_output_ep(struct snd_soc_dapm_widget *widget,
dev_err(widget->dapm->dev,
"ASoC: could not add widget %s\n",
widget->name);
+ path->walking = 0;
return con;
}
}
con += is_connected_output_ep(path->sink, list);
+
+ path->walking = 0;
}
}
@@ -931,6 +939,9 @@ static int is_connected_input_ep(struct snd_soc_dapm_widget *widget,
if (path->weak)
continue;
+ if (path->walking)
+ return 1;
+
if (path->walked)
continue;
@@ -938,6 +949,7 @@ static int is_connected_input_ep(struct snd_soc_dapm_widget *widget,
if (path->source && path->connect) {
path->walked = 1;
+ path->walking = 1;
/* do we need to add this widget to the list ? */
if (list) {
@@ -947,11 +959,14 @@ static int is_connected_input_ep(struct snd_soc_dapm_widget *widget,
dev_err(widget->dapm->dev,
"ASoC: could not add widget %s\n",
widget->name);
+ path->walking = 0;
return con;
}
}
con += is_connected_input_ep(path->source, list);
+
+ path->walking = 0;
}
}
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