commit 64f6d43e93303b84c8885f7e697ec822ceb70667
author Sunny Kapdi <sunnyk@codeaurora.org> Fri Jun 10 17:05:30 2016 -0700
committer Ecco Park <eccopark@google.com> Thu Jun 16 00:37:23 2016 +0000
tree 6f4b6326469a403bd6ac769201a65973ef0c710b
parent 99bfc35243bc810e59ef0c0f39bd79eb59030ab2

Reset vendor power state while BT power on.

Use case: SSR or other similar cases when Bluetooth process
is killed abruptly without cleanup.

Steps: SSR or command timeout cases where Bluetooth process
gets killed abruptly.

Failure: Since, vendor cleanup is not done properly, next
BT enable fails.

Root cause: Vendor power state was not reset.

Fix: Added check for previous known vendor state and send
vendor power off while enabling BT if it is not in off state.

Bug:29243594
Change-Id: I5394f1e0ca8a581fc43efc7440a08aa9b520929d

msm8992/libbt-vendor/src/bt_vendor_qcom.c

diff --git a/msm8992/libbt-vendor/src/bt_vendor_qcom.c b/msm8992/libbt-vendor/src/bt_vendor_qcom.c
index fffdcb8..6c71f3b 100644
--- a/msm8992/libbt-vendor/src/bt_vendor_qcom.c
+++ b/msm8992/libbt-vendor/src/bt_vendor_qcom.c
@@ -664,7 +664,12 @@
                     case BT_SOC_ROME:
                     case BT_SOC_AR3K:
                         /* BT Chipset Power Control through Device Tree Node */
+                        if(nState == BT_VND_PWR_ON && property_get_bool("wc_transport.vnd_power", 0)) {
+                                bt_powerup(BT_VND_PWR_OFF);
+                        }
                         retval = bt_powerup(nState);
+                        if(retval == 0)
+                            property_set("wc_transport.vnd_power", nState == BT_VND_PWR_ON ? "1" : "0");
                     default:
                         break;
                 }