hwc: fix parseHdrCapabilities NPE [1/1]

PD#SWPL-17723

Problem:
the code assume that we can always get hdr info from kernel
however, this is not true in some rarely condition, such as
driver not ready

Solution:
add protection for hdr capabilities parsing

Verify:
Locally

Change-Id: I051f21740bc5c0c87e1619600b3929f9666bb58e
Signed-off-by: Shuide Chen <shuide.chen@amlogic.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/common/display/ConnectorHdmi.cpp b/common/display/ConnectorHdmi.cpp
index b8b2010..583e5a9 100644
--- a/common/display/ConnectorHdmi.cpp
+++ b/common/display/ConnectorHdmi.cpp
@@ -354,12 +354,12 @@ int32_t ConnectorHdmi::parseHdrCapabilities() {
         goto exit;
     }
 
-    pos = strstr(pos, "HDR10Plus Supported: ");
+    if (pos != NULL) pos = strstr(pos, "HDR10Plus Supported: ");
     if ((NULL != pos) && ('1' == *(pos + strlen("HDR10Plus Supported: ")))) {
         mHdrCapabilities.HDR10PlusSupported = true;
     }
 
-    pos = strstr(pos, "SMPTE ST 2084: ");
+    if (pos != NULL) pos = strstr(pos, "SMPTE ST 2084: ");
     if ((NULL != pos) && ('1' == *(pos + strlen("SMPTE ST 2084: ")))) {
         mHdrCapabilities.HDR10Supported = true;
 
@@ -368,7 +368,7 @@ int32_t ConnectorHdmi::parseHdrCapabilities() {
         mHdrCapabilities.minLuminance = getLineValue(pos, "Min: ");
     }
 
-    pos = strstr(buf, "Hybrif Log-Gamma: ");
+    if (pos != NULL) pos = strstr(buf, "Hybrif Log-Gamma: ");
     if ((NULL != pos) && ('1' == *(pos + strlen("Hybrif Log-Gamma: ")))) {
         mHdrCapabilities.HLGSupported = true;
     }