diff options
| author | Vadim Yanitskiy <vyanitskiy@sysmocom.de> | 2023-10-12 06:34:49 +0700 |
|---|---|---|
| committer | Vadim Yanitskiy <vyanitskiy@sysmocom.de> | 2023-10-16 12:21:40 +0700 |
| commit | 79baca14d41663b1282655620328452944a13f4d (patch) | |
| tree | 03b82b6e72848ea327f68a3410831a476bcb0ed4 /src/target/firmware | |
| parent | de630abfc83a88091072fb3c93e958041c3d99f0 (diff) | |
firmware/layer1: mute UL/DL vocodec if it's not needed
The upper layers usually request either of the two configurations:
* (AUDIO_TX_MICROPHONE | AUDIO_RX_SPEAKER) - in this configuration
the phone (PHY) is both the origin and the destination of the TCH
frames. DL frames are played via the built-in speaker; UL frames
recorded using the built-in microphone.
* (AUDIO_TX_TRAFFIC_REQ | AUDIO_RX_TRAFFIC_IND) - in this case
the upper layers (host side) become the origin and the destination
of the TCH frames. The built-in speaker and microphone are
expected to be disabled.
However, when using the second configuration, one can still hear
DL TCH frames being played by the built-in speaker. The built-in
microphone does not seem to be causing any issues, but still we
definitely don't want the vocoder to interfere with the host.
Change-Id: I390db1889f079dea8112794c3e039a9136b897df
Related: OS#4396
Diffstat (limited to 'src/target/firmware')
| -rw-r--r-- | src/target/firmware/include/calypso/l1_environment.h | 2 | ||||
| -rw-r--r-- | src/target/firmware/layer1/prim_tch.c | 12 |
2 files changed, 14 insertions, 0 deletions
diff --git a/src/target/firmware/include/calypso/l1_environment.h b/src/target/firmware/include/calypso/l1_environment.h index d49866e2..476a8a86 100644 --- a/src/target/firmware/include/calypso/l1_environment.h +++ b/src/target/firmware/include/calypso/l1_environment.h @@ -104,6 +104,8 @@ typedef signed short API_SIGNED; #define B_PLAY_UL (1 << 3) // Play UL #define B_DCO_ON (1 << 4) // DCO ON/OFF #define B_AUDIO_ASYNC (1 << 1) // WCP reserved +#define B_MUTE_VOCODEC_DL (1 << 14) // DL voice decoder +#define B_MUTE_VOCODEC_UL (1 << 15) // UL voice encoder // **************************************************************** // PARAMETER AREA (PARAM) MCU<->DSP COMMUNICATION DEFINITIONS diff --git a/src/target/firmware/layer1/prim_tch.c b/src/target/firmware/layer1/prim_tch.c index e3cffd1b..1e3ca752 100644 --- a/src/target/firmware/layer1/prim_tch.c +++ b/src/target/firmware/layer1/prim_tch.c @@ -85,6 +85,18 @@ static void tch_get_params(struct gsm_time *time, uint8_t chan_nr, *tch_mode = SIG_ONLY_MODE; } } + + /* enable/disable the voice decoder (Downlink) */ + if (l1s.audio_mode & AUDIO_RX_SPEAKER) + dsp_api.ndb->d_tch_mode &= ~B_MUTE_VOCODEC_DL; /* unmute */ + else + dsp_api.ndb->d_tch_mode |= B_MUTE_VOCODEC_DL; /* mute */ + + /* enable/disable the voice encoder (Uplink) */ + if (l1s.audio_mode & AUDIO_TX_MICROPHONE) + dsp_api.ndb->d_tch_mode &= ~B_MUTE_VOCODEC_UL; /* unmute */ + else + dsp_api.ndb->d_tch_mode |= B_MUTE_VOCODEC_UL; /* mute */ } |