greybus: audio: Report uevent on GB codec module insertion/removal

GB-Audio-manager module is currently used to report uevent
to above layer in response to any codec module inserted or
removed.

Signed-off-by: Vaibhav Agarwal <vaibhav.agarwal@linaro.org>
Signed-off-by: Mark Greer <mgreer@animalcreek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

diff --git a/drivers/staging/greybus/audio_codec.c b/drivers/staging/greybus/audio_codec.c
index a03caa0..93906c8 100644 (file)
--- a/drivers/staging/greybus/audio_codec.c
+++ b/drivers/staging/greybus/audio_codec.c
@@ -13,6 +13,7 @@
 
 #include "audio_codec.h"
 #include "audio_apbridgea.h"
+#include "audio_manager.h"
 
 #define GB_AUDIO_MGMT_DRIVER_NAME      "gb_audio_mgmt"
 #define GB_AUDIO_DATA_DRIVER_NAME      "gb_audio_data"
@@ -577,6 +578,7 @@ static int gbaudio_codec_probe(struct gb_connection *connection)
        int ret, i;
        struct gbaudio_codec_info *gbcodec;
        struct gb_audio_topology *topology;
+       struct gb_audio_manager_module_descriptor desc;
        struct device *dev = &connection->bundle->dev;
        int dev_id = connection->bundle->id;
 
@@ -639,6 +641,21 @@ static int gbaudio_codec_probe(struct gb_connection *connection)
        mutex_lock(&gbcodec->lock);
        gbcodec->codec_registered = 1;
 
+       /* inform above layer for uevent */
+       if (!gbcodec->set_uevent &&
+           (gbcodec->dai_added == gbcodec->num_dais)) {
+               dev_dbg(dev, "Inform set_event:%d to above layer\n", 1);
+               /* prepare for the audio manager */
+               strlcpy(desc.name, gbcodec->name,
+                       GB_AUDIO_MANAGER_MODULE_NAME_LEN); /* todo */
+               desc.slot = 1; /* todo */
+               desc.vid = 2; /* todo */
+               desc.pid = 3; /* todo */
+               desc.cport = gbcodec->dev_id;
+               desc.devices = 0x2; /* todo */
+               gbcodec->manager_id = gb_audio_manager_add(&desc);
+               gbcodec->set_uevent = 1;
+       }
        mutex_unlock(&gbcodec->lock);
 
        return ret;
@@ -669,6 +686,16 @@ static void gbaudio_codec_remove(struct gb_connection *connection)
        if (!gbcodec)
                return;
 
+       /* inform uevent to above layers */
+       mutex_lock(&gbcodec->lock);
+       if (gbcodec->set_uevent) {
+               /* notify the audio manager */
+               dev_dbg(dev, "Inform set_event:%d to above layer\n", 0);
+               gb_audio_manager_remove(gbcodec->manager_id);
+               gbcodec->set_uevent = 0;
+       }
+       mutex_unlock(&gbcodec->lock);
+
        msm8994_remove_dailink("msm8994-tomtom-mtp-snd-card", &gbaudio_dailink,
                               1);
        gbaudio_remove_dailinks(gbcodec);
@@ -712,6 +739,7 @@ static int gbaudio_dai_probe(struct gb_connection *connection)
        struct device *dev = &connection->bundle->dev;
        int dev_id = connection->bundle->id;
        struct gbaudio_codec_info *gbcodec = dev_get_drvdata(dev);
+       struct gb_audio_manager_module_descriptor desc;
 
        dev_dbg(dev, "Add DAI device:%d:%s\n", dev_id, dev_name(dev));
 
@@ -729,6 +757,22 @@ static int gbaudio_dai_probe(struct gb_connection *connection)
        /* update dai_added count */
        mutex_lock(&gbcodec->lock);
        gbcodec->dai_added++;
+
+       /* inform above layer for uevent */
+       if (!gbcodec->set_uevent && gbcodec->codec_registered &&
+           (gbcodec->dai_added == gbcodec->num_dais)) {
+               /* prepare for the audio manager */
+               dev_dbg(dev, "Inform set_event:%d to above layer\n", 1);
+               strlcpy(desc.name, gbcodec->name,
+                       GB_AUDIO_MANAGER_MODULE_NAME_LEN); /* todo */
+               desc.slot = 1; /* todo */
+               desc.vid = 2; /* todo */
+               desc.pid = 3; /* todo */
+               desc.cport = gbcodec->dev_id;
+               desc.devices = 0x2; /* todo */
+               gbcodec->manager_id = gb_audio_manager_add(&desc);
+               gbcodec->set_uevent = 1;
+       }
        mutex_unlock(&gbcodec->lock);
 
        return 0;
@@ -749,6 +793,12 @@ static void gbaudio_dai_remove(struct gb_connection *connection)
 
        /* inform uevent to above layers */
        mutex_lock(&gbcodec->lock);
+       if (gbcodec->set_uevent) {
+               /* notify the audio manager */
+               dev_dbg(dev, "Inform set_event:%d to above layer\n", 0);
+               gb_audio_manager_remove(gbcodec->manager_id);
+               gbcodec->set_uevent = 0;
+       }
        /* update dai_added count */
        gbcodec->dai_added--;
        mutex_unlock(&gbcodec->lock);

diff --git a/drivers/staging/greybus/audio_codec.h b/drivers/staging/greybus/audio_codec.h
index 5051e06..fcf3a06 100644 (file)
--- a/drivers/staging/greybus/audio_codec.h
+++ b/drivers/staging/greybus/audio_codec.h
@@ -97,10 +97,13 @@ struct gbaudio_codec_info {
        int type;
        int dai_added;
        int codec_registered;
+       int set_uevent;
        char vstr[NAME_SIZE];
        char pstr[NAME_SIZE];
        struct list_head list;
        struct gb_audio_topology *topology;
+       /* need to share this info to above user space */
+       int manager_id;
        char name[NAME_SIZE];
 
        /* soc related data */