diff --git a/sys/kms/gstkmssink.c b/sys/kms/gstkmssink.c
index 40c465e..3264201 100644
--- a/sys/kms/gstkmssink.c
+++ b/sys/kms/gstkmssink.c
@@ -102,6 +102,8 @@
 
 static GParamSpec *g_properties[PROP_N] = { NULL, };
 
+#define SCALE_RATIO_NO_LIMITATION 100000
+
 static void
 gst_kms_sink_set_render_rectangle (GstVideoOverlay * overlay,
     gint x, gint y, gint width, gint height)
@@ -465,6 +467,15 @@
   if (self->conn_id < 0 || !self->display_connected)
     return;
 
+  /* FIXME: for dpu, we can only hard code the scale ratio,
+   * dpu has no limitation when do upscale but can not support
+   * downscale */
+  if (strcmp (get_imx_drm_device_name(), "DPU") == 0) {
+    self->downscale_ratio = 1;
+    self->upscale_ratio = SCALE_RATIO_NO_LIMITATION;
+    return;
+  }
+
   gst_video_info_init (&vinfo);
   gst_video_info_set_format (&vinfo, GST_VIDEO_FORMAT_NV12, self->hdisplay, self->vdisplay);
 
@@ -1828,14 +1839,14 @@
   if ((result.x + result.w) > self->hdisplay) {
     gint crop_width = self->hdisplay - result.x;
     if (crop_width > 0)
-      src.w = crop_width * src.w / result.w;
+      src.w = GST_ROUND_UP_2 (crop_width * src.w / result.w);
     result.w = crop_width;
   }
 
   if ((result.y + result.h) > self->vdisplay) {
     gint crop_height = self->vdisplay - result.y;
     if (crop_height > 0)
-      src.h = crop_height * src.h / result.h;
+      src.h = GST_ROUND_UP_2 (crop_height * src.h / result.h);
     result.h = crop_height;
   }
 
diff --git a/sys/kms/gstkmsutils.c b/sys/kms/gstkmsutils.c
index 4be7137..23b3cc7 100644
--- a/sys/kms/gstkmsutils.c
+++ b/sys/kms/gstkmsutils.c
@@ -28,6 +28,8 @@
 #endif
 
 #include <drm_fourcc.h>
+#include <dirent.h>
+#include <string.h>
 
 #include "gstkmsutils.h"
 
@@ -231,3 +233,38 @@
   if (dpy_par_d)
     *dpy_par_d = device_par_map[index][windex ^ 1];
 }
+
+const gchar *
+get_imx_drm_device_name (void)
+{
+  struct dirent **entry_list;
+  guint count;
+  guint i;
+  const gchar * device;
+
+  count = scandir ("/proc/device-tree", &entry_list, 0, alphasort);
+  if (count < 0)
+    return NULL;
+
+  for (i = 0; i < count; i++) {
+    struct dirent *entry;
+
+    entry = entry_list[i];
+    if (strstr (entry->d_name, "dpu@")) {
+      device = "DPU";
+      break;
+    }
+
+    if (strstr (entry->d_name, "dcss@")) {
+      device = "DCSS";
+      break;
+    }
+  }
+
+  for (i = 0; i < count; i++) {
+    g_free (entry_list[i]);
+  }
+  g_free (entry_list);
+
+  return device;
+}
diff --git a/sys/kms/gstkmsutils.h b/sys/kms/gstkmsutils.h
index 6570070..95e81f8 100644
--- a/sys/kms/gstkmsutils.h
+++ b/sys/kms/gstkmsutils.h
@@ -41,7 +41,7 @@
 						 guint dev_height_mm,
 						 guint * dpy_par_n,
 						 guint * dpy_par_d);
-
+const gchar * get_imx_drm_device_name (void);
 G_END_DECLS
 
 #endif