diff --git a/imx258-oemut-preview-dump-robustness-20260921.patch b/imx258-oemut-preview-dump-robustness-20260921.patch
deleted file mode 100644
index 767d4d18c..000000000
--- a/imx258-oemut-preview-dump-robustness-20260921.patch
+++ /dev/null
@@ -1,74 +0,0 @@
---- a/source_sync_rls_25c/source/unisoc/multimedia/camera/libcamera/UT/OemUnitTest/OemUnitTest.cpp
-+++ b/source_sync_rls_25c/source/unisoc/multimedia/camera/libcamera/UT/OemUnitTest/OemUnitTest.cpp
-@@ -303,6 +303,7 @@
- 
- int OemUnitTest::zslSnapshot() {
-   int ret = CMR_CAMERA_SUCCESS;
-+  Sprd_camera_state preview_state = getPreviewState();
- 
-   /*
-    * ZSL is disabled on the current single-camera SBC bring-up path. Keep the
-@@ -317,18 +318,26 @@
-   mCaptureMode = CAMERA_NORMAL_MODE;
-   mSprdZslEnabled = false;
- 
--  if (!isPreviewing()) {
-+  if (SPRD_IDLE == preview_state) {
-     ret = startPreview();
-     if (ret) {
-       CMR_LOGE("zslSnapshot: fail to start preview dump");
-       return ret;
-     }
-+  } else {
-+    printf("OemUnitTest zslSnapshot reuse preview state %s\n",
-+           getCameraStateStr(preview_state));
-   }
- 
-   usleep(1000 * 1000);
-   printf("OemUnitTest zslSnapshot preview-dump saved %d frame(s)\n",
-          camera_dump_cnt_pre);
- 
-+  if (camera_dump_cnt_pre <= 0) {
-+    CMR_LOGE("zslSnapshot: no preview frame dumped");
-+    return CMR_CAMERA_FAIL;
-+  }
-+
-   return CMR_CAMERA_SUCCESS;
- }
- 
-@@ -369,6 +378,7 @@
- 
- int OemUnitTest::takePicture() {
-   int ret = CMR_CAMERA_SUCCESS;
-+  Sprd_camera_state preview_state = getPreviewState();
- 
-   /*
-    * SBC bring-up path: the normal snapshot/JPEG pipeline still depends on
-@@ -389,18 +399,26 @@
-   mCaptureMode = CAMERA_NORMAL_MODE;
-   mSprdZslEnabled = false;
- 
--  if (!isPreviewing()) {
-+  if (SPRD_IDLE == preview_state) {
-     ret = startPreview();
-     if (ret) {
-       CMR_LOGE("takePicture: fail to start preview dump");
-       return ret;
-     }
-+  } else {
-+    printf("OemUnitTest takePicture reuse preview state %s\n",
-+           getCameraStateStr(preview_state));
-   }
- 
-   usleep(1000 * 1000);
-   printf("OemUnitTest takePicture preview-dump saved %d frame(s)\n",
-          camera_dump_cnt_pre);
- 
-+  if (camera_dump_cnt_pre <= 0) {
-+    CMR_LOGE("takePicture: no preview frame dumped");
-+    return CMR_CAMERA_FAIL;
-+  }
-+
-   return CMR_CAMERA_SUCCESS;
- }
-