diff --git a/hardware/rockchip/hwcomposer/drmhwc2/drm/drmconnector.cpp b/hardware/rockchip/hwcomposer/drmhwc2/drm/drmconnector.cpp
index 2a63e7faee2..2eaae487cea 100755
--- a/hardware/rockchip/hwcomposer/drmhwc2/drm/drmconnector.cpp
+++ b/hardware/rockchip/hwcomposer/drmhwc2/drm/drmconnector.cpp
@@ -469,21 +469,21 @@ int DrmConnector::UpdateDisplayMode(int display_id, int update_base_timeline){
   uint32_t MaxResolution = 0,temp;
 
   snprintf(resolution_property,PROPERTY_VALUE_MAX,"persist.vendor.resolution.%s",cUniqueName_);
-  property_get(resolution_property, resolution_value, "Unkonw");
+  property_get(resolution_property, resolution_value, "Unknown");
 
   ALOGI("%s,line=%d, display=%d %s=%s",__FUNCTION__,__LINE__,display_id,resolution_property,resolution_value);
 
-  if(!strcmp(resolution_value,"Unkonw")){
+  if(!strcmp(resolution_value,"Unknown")){
     if(display_id == HWC_DISPLAY_PRIMARY){
-      property_get("persist.vendor.resolution.main", resolution_value, "Unkonw");
+      property_get("persist.vendor.resolution.main", resolution_value, "Unknown");
     }else{
-      property_get("persist.vendor.resolution.aux", resolution_value, "Unkonw");
+      property_get("persist.vendor.resolution.aux", resolution_value, "Unknown");
     }
     ALOGI("%s,line=%d, display=%d persist.vendor.resolution.%s=%s",__FUNCTION__,__LINE__,display_id,
           display_id == HWC_DISPLAY_PRIMARY ? "main" : "aux",resolution_value);
   }
 
-  if(strcmp(resolution_value,"Unkonw") != 0){
+  if(strcmp(resolution_value,"Unknown") != 0){
     ALOGI("%s,line=%d, resolution_value=%s",__FUNCTION__,__LINE__,resolution_value);
     int len = sscanf(resolution_value, "%dx%d@%f-%d-%d-%d-%d-%d-%d-%x-%d",
                      &width, &height, &vrefresh, &hsync_start,
@@ -529,8 +529,8 @@ int DrmConnector::UpdateDisplayMode(int display_id, int update_base_timeline){
         }
       }
     }
-  }else{ // resolution_value is Unkonw
-    if(baseparameter_ready_ && !strcmp(resolution_value,"Unkonw")){
+  }else{ // resolution_value is Unknown
+    if(baseparameter_ready_ && !strcmp(resolution_value,"Unknown")){
       ALOGI("%s,line=%d, can't find suitable Resolution Property, try to use Baseparameter.",__FUNCTION__,__LINE__);
       if(update_base_timeline != iTimeline_){
         iTimeline_ = update_base_timeline;
@@ -711,15 +711,15 @@ int DrmConnector::UpdateOverscan(int display_id, char *overscan_value){
   char overscan_property[PROPERTY_VALUE_MAX]={0};
 
   snprintf(overscan_property,PROPERTY_VALUE_MAX,"persist.vendor.overscan.%s",cUniqueName_);
-  property_get(overscan_property, overscan_value, "Unkonw");
+  property_get(overscan_property, overscan_value, "Unknown");
 
   // ALOGI("%s,line=%d, display=%d %s=%s",__FUNCTION__,__LINE__,display_id,overscan_property,overscan_value);
 
-  if(!strcmp(overscan_value,"Unkonw")){
+  if(!strcmp(overscan_value,"Unknown")){
     if(display_id == HWC_DISPLAY_PRIMARY){
-      property_get("persist.vendor.overscan.main", overscan_value, "Unkonw");
+      property_get("persist.vendor.overscan.main", overscan_value, "Unknown");
     }else{
-      property_get("persist.vendor.overscan.aux", overscan_value, "Unkonw");
+      property_get("persist.vendor.overscan.aux", overscan_value, "Unknown");
     }
     // ALOGI("%s,line=%d, display=%d persist.vendor.overscan.%s=%s",__FUNCTION__,__LINE__,display_id,
     //       display_id == HWC_DISPLAY_PRIMARY ? "main" : "aux", overscan_value);
@@ -1031,21 +1031,21 @@ int DrmConnector::GetFramebufferInfo(int display_id, uint32_t *w, uint32_t *h, u
   uint32_t width=0, height=0, vrefresh=0;
 
   snprintf(framebuffer_property,PROPERTY_VALUE_MAX,"persist.vendor.framebuffer.%s",cUniqueName_);
-  property_get(framebuffer_property, framebuffer_value, "Unkonw");
+  property_get(framebuffer_property, framebuffer_value, "Unknown");
 
   ALOGI("%s,line=%d, display=%d %s=%s",__FUNCTION__,__LINE__,display_id,framebuffer_property,framebuffer_value);
 
-  if(!strcmp(framebuffer_value,"Unkonw")){
+  if(!strcmp(framebuffer_value,"Unknown")){
     if(display_id == HWC_DISPLAY_PRIMARY){
-      property_get("persist.vendor.framebuffer.main", framebuffer_value, "Unkonw");
+      property_get("persist.vendor.framebuffer.main", framebuffer_value, "Unknown");
     }else{
-      property_get("persist.vendor.framebuffer.aux", framebuffer_value, "Unkonw");
+      property_get("persist.vendor.framebuffer.aux", framebuffer_value, "Unknown");
     }
     ALOGI("%s,line=%d, display=%d persist.vendor.framebuffer.%s=%s",__FUNCTION__,__LINE__,display_id,
           display_id == HWC_DISPLAY_PRIMARY ? "main" : "aux",framebuffer_value);
   }
 
-  if(!strcmp(framebuffer_value,"Unkonw")){
+  if(!strcmp(framebuffer_value,"Unknown")){
     if(baseparameter_ready_){
       *w = baseparameter_.framebuffer_info.framebuffer_width;
       *h   = baseparameter_.framebuffer_info.framebuffer_height;