hwc2 : Correcting primary display count handling

Check the count for the pluggable (max_pluggable)
and buildin display (max_buildin) to be non-zero
before reducing the count for the instance of
primary display already used.

Signed-off-by: satbir singh <satbsing@codeaurora.org>

Change-Id: Ie067badd523d9ea9db428de596a8cc2e7e2e26e8

1 files changed, 2 insertions, 2 deletions

diff --git a/sdm/libs/hwc2/hwc_session.cpp b/sdm/libs/hwc2/hwc_session.cpp
index 0afaeab4..0f86b397 100644
--- a/sdm/libs/hwc2/hwc_session.cpp
+++ b/sdm/libs/hwc2/hwc_session.cpp
@@ -321,10 +321,10 @@ void HWCSession::InitSupportedDisplaySlots() {
     return;
   }
 
-  if (kPluggable == hw_disp_info.type) {
+  if (kPluggable == hw_disp_info.type && max_pluggable != 0) {
     // If primary is a pluggable display, we have already used one pluggable display interface.
     max_pluggable--;
-  } else {
+  } else if (max_builtin != 0) {
     max_builtin--;
   }