diff --git a/cocos/renderer/backend/metal/DeviceInfoMTL.mm b/cocos/renderer/backend/metal/DeviceInfoMTL.mm
index 980eb33435..f0102c8f60 100644
--- a/cocos/renderer/backend/metal/DeviceInfoMTL.mm
+++ b/cocos/renderer/backend/metal/DeviceInfoMTL.mm
@@ -397,9 +397,6 @@ const char* DeviceInfoMTL::getExtension() const
 
 bool DeviceInfoMTL::checkForFeatureSupported(FeatureType feature)
 {
-    //TODO coulsonwang, removed it later.
-    return false;
-    
     bool featureSupported = false;
     switch (feature)
     {
diff --git a/cocos/renderer/backend/metal/TextureMTL.mm b/cocos/renderer/backend/metal/TextureMTL.mm
index 959ae815d1..ecfc27031e 100644
--- a/cocos/renderer/backend/metal/TextureMTL.mm
+++ b/cocos/renderer/backend/metal/TextureMTL.mm
@@ -41,21 +41,6 @@ namespace
         }
     }
     
-    MTLSamplerMipFilter toMTLSamplerMipFilter(SamplerFilter mode) {
-        switch (mode) {
-            case SamplerFilter::NEAREST:
-            case SamplerFilter::LINEAR_MIPMAP_NEAREST:
-            case SamplerFilter::NEAREST_MIPMAP_NEAREST:
-                return MTLSamplerMipFilterNearest;
-            case SamplerFilter::LINEAR:
-            case SamplerFilter::LINEAR_MIPMAP_LINEAR:
-            case SamplerFilter::NEAREST_MIPMAP_LINEAR:
-                return MTLSamplerMipFilterLinear;
-            case SamplerFilter::DONT_CARE:
-                return MTLSamplerMipFilterNearest;
-        }
-    }
-    
     void convertRGB2RGBA(uint8_t* src, uint8_t* dst, uint32_t length)
     {
         for (uint32_t i = 0; i < length; ++i)
@@ -157,8 +142,8 @@ namespace
         MTLPixelFormat pixelFormat = Utils::toMTLPixelFormat(textureFormat);
         uint32_t bytesPerRow = 0;
         
-        if(textureFormat >= PixelFormat::PVRTC2 &&
-           textureFormat <= PixelFormat::PVRTC4A)
+        if(textureFormat >= PixelFormat::PVRTC4 &&
+           textureFormat <= PixelFormat::PVRTC2A)
         {
             bytesPerRow = 0;
         }