imx233: fix recording gain

For some reason, there was a mismatch between the setting (decibel) and the
audiohw code (centicel). This resulted in a gain divided by 10. This may
explain why some people experienced low volume with the mic on the fuze+.

Change-Id: I138ac18dd93c36f43a7dfce735efc826405c598c

1 files changed, 4 insertions, 3 deletions

diff --git a/firmware/drivers/audio/imx233-codec.c b/firmware/drivers/audio/imx233-codec.c
index b2dcaa3..357aa33 100644
--- a/firmware/drivers/audio/imx233-codec.c
+++ b/firmware/drivers/audio/imx233-codec.c
@@ -49,6 +49,7 @@ void audiohw_close(void)
 /* volume in centibels */
 void audiohw_set_volume(int vol_l, int vol_r)
 {
+    /* convert to half-dB */
     imx233_audioout_set_hp_vol(vol_l / 5, vol_r / 5);
 }
 
@@ -72,11 +73,11 @@ void audiohw_disable_recording(void)
     imx233_audioin_close();
 }
 
-/* volume in centibels */
+/* volume in decibels */
 void audiohw_set_recvol(int left, int right, int type)
 {
-    left /= 5;
-    right /= 5;
+    left *= 2; /* convert to half-dB */
+    right *= 2;
     if(type == AUDIO_GAIN_LINEIN)
     {
         imx233_audioin_set_vol(false, left, AUDIOIN_SELECT_LINE1);