diff options
Diffstat (limited to 'audio_a2dp_hw/audio_a2dp_hw.c')
| -rw-r--r-- | audio_a2dp_hw/audio_a2dp_hw.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/audio_a2dp_hw/audio_a2dp_hw.c b/audio_a2dp_hw/audio_a2dp_hw.c index 42e416e..e1a99c5 100644 --- a/audio_a2dp_hw/audio_a2dp_hw.c +++ b/audio_a2dp_hw/audio_a2dp_hw.c @@ -142,6 +142,34 @@ static const char* dump_a2dp_ctrl_event(char event) } } +#ifdef A2DP_HW_SYSFS_TUNER +/* If kernel supports some kind of A2DP related tuning, + this function should be used to switch tuning on/off. + Specify in BLUEDROID BUILDCFG the following values: + A2DP_HW_SYSFS_TUNER "/sysfs/path/to/tuner/or/scaling_min_freq" + A2DP_HW_SYSFS_TUNER_OFF "0" # value to switch tuning off, + # "0" or a Min Freq off value + # like "0" + A2DP_HW_SYSFS_TUNER_ON "1" # value to switch tuning on + # "1", or Min Freq boost value + # like "205000" +*/ +static void a2dp_hw_sysfs_tuning(int state) +{ + int fd = open( A2DP_HW_SYSFS_TUNER, O_WRONLY); + if(fd > 0) { + char *val = A2DP_HW_SYSFS_TUNER_OFF; + if (state) + { + val = A2DP_HW_SYSFS_TUNER_ON; + } + write(fd, val, strlen(val)); + INFO("a2dp tuning set to %s", val); + close(fd); + } +} +#endif + /* logs timestamp with microsec precision pprev is optional in case a dedicated diff is required */ static void ts_log(char *tag, int val, struct timespec *pprev_opt) @@ -356,6 +384,9 @@ static int start_audio_datapath(struct a2dp_stream_out *out) out->state = AUDIO_A2DP_STATE_STARTED; } +#ifdef A2DP_HW_SYSFS_TUNER + a2dp_hw_sysfs_tuning(1); +#endif return 0; } @@ -366,6 +397,11 @@ static int stop_audio_datapath(struct a2dp_stream_out *out) INFO("state %d", out->state); +#ifdef A2DP_HW_SYSFS_TUNER + /* disable a2dp tuning ASAP */ + a2dp_hw_sysfs_tuning(0); +#endif + if (out->ctrl_fd == AUDIO_SKT_DISCONNECTED) return -1; @@ -393,6 +429,11 @@ static int suspend_audio_datapath(struct a2dp_stream_out *out, bool standby) { INFO("state %d", out->state); +#ifdef A2DP_HW_SYSFS_TUNER + /* disable a2dp tuning ASAP */ + a2dp_hw_sysfs_tuning(0); +#endif + if (out->ctrl_fd == AUDIO_SKT_DISCONNECTED) return -1; |