ASoC: dapm: Add API call to query valid DAPM paths

In preparation for ASoC DSP support.

Add a DAPM API call to determine whether a DAPM audio path is valid between
source and sink widgets. This also takes into account all kcontrol mux and mixer
settings in between the source and sink widgets to validate the audio path.

This will be used by the DSP core to determine the runtime DAI mappings
between FE and BE DAIs in order to run PCM operations.

Signed-off-by: Liam Girdwood <lrg@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 80 insertions, 0 deletions

diff --git a/include/trace/events/asoc.h b/include/trace/events/asoc.h
index ab26f8aa3c78..6d8efb1cc8ce 100644
--- a/include/trace/events/asoc.h
+++ b/include/trace/events/asoc.h
@@ -7,6 +7,8 @@
 #include <linux/ktime.h>
 #include <linux/tracepoint.h>
 
+#define DAPM_DIRECT "(direct)"
+
 struct snd_soc_jack;
 struct snd_soc_codec;
 struct snd_soc_platform;
@@ -241,6 +243,84 @@ TRACE_EVENT(snd_soc_dapm_walk_done,
                   (int)__entry->path_checks, (int)__entry->neighbour_checks)
 );
 
+TRACE_EVENT(snd_soc_dapm_output_path,
+
+        TP_PROTO(struct snd_soc_dapm_widget *widget,
+                struct snd_soc_dapm_path *path),
+
+        TP_ARGS(widget, path),
+
+        TP_STRUCT__entry(
+                __string(       wname,  widget->name            )
+                __string(       pname,  path->name ? path->name : DAPM_DIRECT)
+                __string(       psname, path->sink->name        )
+                __field(        int,    path_sink               )
+                __field(        int,    path_connect            )
+        ),
+
+        TP_fast_assign(
+                __assign_str(wname, widget->name);
+                __assign_str(pname, path->name ? path->name : DAPM_DIRECT);
+                __assign_str(psname, path->sink->name);
+                __entry->path_connect = path->connect;
+                __entry->path_sink = (int)path->sink;
+        ),
+
+        TP_printk("%c%s -> %s -> %s\n",
+                (int) __entry->path_sink &&
+                (int) __entry->path_connect ? '*' : ' ',
+                __get_str(wname), __get_str(pname), __get_str(psname))
+);
+
+TRACE_EVENT(snd_soc_dapm_input_path,
+
+        TP_PROTO(struct snd_soc_dapm_widget *widget,
+                struct snd_soc_dapm_path *path),
+
+        TP_ARGS(widget, path),
+
+        TP_STRUCT__entry(
+                __string(       wname,  widget->name            )
+                __string(       pname,  path->name ? path->name : DAPM_DIRECT)
+                __string(       psname, path->source->name      )
+                __field(        int,    path_source             )
+                __field(        int,    path_connect            )
+        ),
+
+        TP_fast_assign(
+                __assign_str(wname, widget->name);
+                __assign_str(pname, path->name ? path->name : DAPM_DIRECT);
+                __assign_str(psname, path->source->name);
+                __entry->path_connect = path->connect;
+                __entry->path_source = (int)path->source;
+        ),
+
+        TP_printk("%c%s <- %s <- %s\n",
+                (int) __entry->path_source &&
+                (int) __entry->path_connect ? '*' : ' ',
+                __get_str(wname), __get_str(pname), __get_str(psname))
+);
+
+TRACE_EVENT(snd_soc_dapm_connected,
+
+        TP_PROTO(int paths, int stream),
+
+        TP_ARGS(paths, stream),
+
+        TP_STRUCT__entry(
+                __field(        int,    paths           )
+                __field(        int,    stream          )
+        ),
+
+        TP_fast_assign(
+                __entry->paths = paths;
+                __entry->stream = stream;
+        ),
+
+        TP_printk("%s: found %d paths\n",
+                __entry->stream ? "capture" : "playback", __entry->paths)
+);
+
 TRACE_EVENT(snd_soc_jack_irq,
 
         TP_PROTO(const char *name),