hal: Fix no audio during voice call with voip in background

- First, ringtone uses audio combo device "speaker-and-headphones".
  Then IN_CALL mode is set, voice call useacase starts and selects
  device based on primary output. But at this moment APM hasn't
  routed output to headset. Voice call usecase starts and
  audio device still uses "speaker-and-headphones" combo device.
  This would causes no audio issue due to no backends enabled.
  And in APM, voice call usecase is not allowed to route to combo
  device.

- Add combo device check before voice set up. It forces voice stop
  when voice start with combo device.

CRs-Fixed: 2113931
Change-Id: I3f0b6286a2ab473c83e0caa59917de81d56b7df5

1 files changed, 8 insertions, 0 deletions

diff --git a/hal/voice.c b/hal/voice.c
index b8a4609f..8df338cc 100644
--- a/hal/voice.c
+++ b/hal/voice.c
@@ -134,6 +134,14 @@ int voice_start_usecase(struct audio_device *adev, audio_usecase_t usecase_id)
     uc_info->type = VOICE_CALL;
     uc_info->stream.out = adev->current_call_output;
     uc_info->devices = adev->current_call_output->devices;
+
+    if (popcount(uc_info->devices) == 2) {
+        ALOGE("%s: Invalid combo device(%#x) for voice call", __func__,
+              uc_info->devices);
+        ret = -EIO;
+        goto error_start_voice;
+    }
+
     uc_info->in_snd_device = SND_DEVICE_NONE;
     uc_info->out_snd_device = SND_DEVICE_NONE;