libcamera2: add supported preview format "yuv420sp"
diff --git a/QualcommCameraHardware.cpp b/QualcommCameraHardware.cpp
index 0aadcfa..feff2f3 100644
--- a/QualcommCameraHardware.cpp
+++ b/QualcommCameraHardware.cpp
@@ -896,6 +896,8 @@
                     CameraParameters::WHITE_BALANCE_AUTO);
     mParameters.set(CameraParameters::KEY_FOCUS_MODE,
                     CameraParameters::FOCUS_MODE_AUTO);
+    mParameters.set(CameraParameters::KEY_SUPPORTED_PREVIEW_FORMATS,
+                    "yuv420sp");
 
     mParameters.set(CameraParameters::KEY_SUPPORTED_PREVIEW_SIZES,
                     preview_size_values.string());