tree b78205407040d35c3a93d476e3d04f25962f8d81
parent a3dc5037d8dd14e84751e6fa918839d81897e808
author Ravi Kumar Alamanda <ralama@codeaurora.org> 1371085349 -0700
committer Patrick Tjin <pattjin@google.com> 1371137139 -0700

audio: Fix channel swap issue on wired headset

- While playing stereo content on wired headset, the channels
  are swapped always.
- This is due to limitation on headset specific mixer controls
  enable sequence. For correct channel mapping from DSP to
  Slimbus and then to Codec, it is required to enable the left
  channel specific mixer controls first and then right channel
  mixer controls. But the audioroute library does not follow
  the order specified in the mixer_paths.xml but the order
  of mixer controls queried from mixer card. In this order,
  right channel specific mixer control is enabled first which
  leads right channel data from DSP is routed to first slimbus
  channel and left channel PCM to second slimbus channel.
- Fixed by making left channel specific mixer control as a
  default connection so that it will always be connected first
  slimbus channel and hence headphone left path.

Bug: 9208566
Change-Id: Ib807e2d09b49725ab0e25b4458f8c170cd5bc2de