ALSA: isight: add AudioEnable register write

which is needed to get the iSight to talk.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 14 insertions, 3 deletions

diff --git a/sound/firewire/isight.c b/sound/firewire/isight.c
index 10a9b9b0b2c2..1a8da2614db6 100644
--- a/sound/firewire/isight.c
+++ b/sound/firewire/isight.c
@@ -345,7 +345,7 @@ static int isight_hw_free(struct snd_pcm_substream *substream)
 
 static int isight_start_streaming(struct isight *isight)
 {
-        __be32 sample_rate;
+        __be32 value;
         unsigned int i;
         int err;
 
@@ -356,10 +356,10 @@ static int isight_start_streaming(struct isight *isight)
                         return 0;
         }
 
-        sample_rate = cpu_to_be32(RATE_48000);
+        value = cpu_to_be32(RATE_48000);
         err = snd_fw_transaction(isight->unit, TCODE_WRITE_QUADLET_REQUEST,
                                  isight->audio_base + REG_SAMPLE_RATE,
-                                 &sample_rate, 4);
+                                 &value, 4);
         if (err < 0)
                 return err;
 
@@ -367,6 +367,13 @@ static int isight_start_streaming(struct isight *isight)
         if (err < 0)
                 goto error;
 
+        value = cpu_to_be32(AUDIO_ENABLE);
+        err = snd_fw_transaction(isight->unit, TCODE_WRITE_QUADLET_REQUEST,
+                                 isight->audio_base + REG_AUDIO_ENABLE,
+                                 &value, 4);
+        if (err < 0)
+                goto err_resources;
+
         isight->context = fw_iso_context_create(isight->device->card,
                                                 FW_ISO_CONTEXT_RECEIVE,
                                                 isight->resources.channel,
@@ -400,6 +407,10 @@ err_context:
         fw_iso_context_destroy(isight->context);
         isight->context = NULL;
 err_resources:
+        value = 0;
+        snd_fw_transaction(isight->unit, TCODE_WRITE_QUADLET_REQUEST,
+                           isight->audio_base + REG_AUDIO_ENABLE,
+                           &value, 4);
         fw_iso_resources_free(&isight->resources);
 error:
         return err;