diff --git a/services/camera/libcameraservice/Camera2Client.cpp b/services/camera/libcameraservice/Camera2Client.cpp
index a83977f..d315abb 100644
--- a/services/camera/libcameraservice/Camera2Client.cpp
+++ b/services/camera/libcameraservice/Camera2Client.cpp
@@ -624,7 +624,13 @@
 status_t Camera2Client::startPreviewL(Parameters &params, bool restart) {
     ATRACE_CALL();
     status_t res;
-    if (params.state >= Parameters::PREVIEW && !restart) {
+    if (params.state == Parameters::PREVIEW && !restart) {
+        // Succeed attempt to re-enter preview state
+        ALOGI("%s: Not starting preview; already in preview state.",
+              __FUNCTION__);
+        return OK;
+    }
+    if (params.state > Parameters::PREVIEW && !restart) {
         ALOGE("%s: Can't start preview in state %s",
                 __FUNCTION__,
                 Parameters::getStateName(params.state));
diff --git a/services/camera/libcameraservice/camera2/Parameters.cpp b/services/camera/libcameraservice/camera2/Parameters.cpp
index ec85f9c..6383434 100644
--- a/services/camera/libcameraservice/camera2/Parameters.cpp
+++ b/services/camera/libcameraservice/camera2/Parameters.cpp
@@ -94,16 +94,16 @@
 
     params.set(CameraParameters::KEY_PREVIEW_FPS_RANGE,
             String8::format("%d,%d",
-                    previewFpsRange[0],
-                    previewFpsRange[1]));
+                    previewFpsRange[0] * kFpsToApiScale,
+                    previewFpsRange[1] * kFpsToApiScale));
 
     {
         String8 supportedPreviewFpsRange;
         for (size_t i=0; i < availableFpsRanges.count; i += 2) {
             if (i != 0) supportedPreviewFpsRange += ",";
             supportedPreviewFpsRange += String8::format("(%d,%d)",
-                    availableFpsRanges.data.i32[i],
-                    availableFpsRanges.data.i32[i+1]);
+                    availableFpsRanges.data.i32[i] * kFpsToApiScale,
+                    availableFpsRanges.data.i32[i+1] * kFpsToApiScale);
         }
         params.set(CameraParameters::KEY_SUPPORTED_PREVIEW_FPS_RANGE,
                 supportedPreviewFpsRange);
@@ -170,6 +170,7 @@
     // PREVIEW_FRAME_RATE / SUPPORTED_PREVIEW_FRAME_RATES are deprecated, but
     // still have to do something sane for them
 
+    // NOTE: Not scaled like FPS range values are.
     params.set(CameraParameters::KEY_PREVIEW_FRAME_RATE,
             previewFpsRange[0]);
 
@@ -894,6 +895,9 @@
     bool fpsRangeChanged = false;
     newParams.getPreviewFpsRange(&validatedParams.previewFpsRange[0],
             &validatedParams.previewFpsRange[1]);
+    validatedParams.previewFpsRange[0] /= kFpsToApiScale;
+    validatedParams.previewFpsRange[1] /= kFpsToApiScale;
+
     if (validatedParams.previewFpsRange[0] != previewFpsRange[0] ||
             validatedParams.previewFpsRange[1] != previewFpsRange[1]) {
         fpsRangeChanged = true;
diff --git a/services/camera/libcameraservice/camera2/Parameters.h b/services/camera/libcameraservice/camera2/Parameters.h
index 7789ebb..af23a4e 100644
--- a/services/camera/libcameraservice/camera2/Parameters.h
+++ b/services/camera/libcameraservice/camera2/Parameters.h
@@ -223,6 +223,10 @@
     // Map from camera orientation + facing to gralloc transform enum
     static int degToTransform(int degrees, bool mirror);
 
+    // API specifies FPS ranges are done in fixed point integer, with LSB = 0.001.
+    // Note that this doesn't apply to the (deprecated) single FPS value.
+    static const int kFpsToApiScale = 1000;
+
     // Transform between (-1000,-1000)-(1000,1000) normalized coords from camera
     // API and HAL2 (0,0)-(activePixelArray.width/height) coordinates
     int arrayXToNormalized(int width) const;