diff --git a/arch/sandbox/include/asm/sdl.h b/arch/sandbox/include/asm/sdl.h
index e271a849af..56dcb84803 100644
--- a/arch/sandbox/include/asm/sdl.h
+++ b/arch/sandbox/include/asm/sdl.h
@@ -94,6 +94,11 @@ static inline int sandbox_sdl_init_display(int width, int height, int log2_bpp,
 	return -ENODEV;
 }
 
+static inline int sandbox_sdl_remove_display(void)
+{
+	return -ENODEV;
+}
+
 static inline int sandbox_sdl_sync(void *lcd_base)
 {
 	return -ENODEV;
diff --git a/drivers/video/stb_truetype.h b/drivers/video/stb_truetype.h
index 26f4ac2ca8..438bfce468 100644
--- a/drivers/video/stb_truetype.h
+++ b/drivers/video/stb_truetype.h
@@ -1768,10 +1768,13 @@ static void stbtt__rasterize_sorted_edges(stbtt__bitmap *result, stbtt__edge *e,
    int s; // vertical subsample index
    unsigned char scanline_data[512], *scanline;
 
-   if (result->w > 512)
+   if (result->w > 512) {
       scanline = (unsigned char *) STBTT_malloc(result->w, userdata);
-   else
+      if (!scanline)
+         return;
+   } else {
       scanline = scanline_data;
+   }
 
    y = off_y * vsubsample;
    e[n].y0 = (off_y + result->h) * (float) vsubsample + 1;
@@ -1821,6 +1824,8 @@ static void stbtt__rasterize_sorted_edges(stbtt__bitmap *result, stbtt__edge *e,
          while (e->y0 <= scan_y) {
             if (e->y1 > scan_y) {
                stbtt__active_edge *z = stbtt__new_active(&hh, e, off_x, scan_y, userdata);
+               if (!z)
+                  return;
                // find insertion point
                if (active == NULL)
                   active = z;
@@ -2068,10 +2073,13 @@ static void stbtt__rasterize_sorted_edges(stbtt__bitmap *result, stbtt__edge *e,
    int y,j=0, i;
    float scanline_data[129], *scanline, *scanline2;
 
-   if (result->w > 64)
+   if (result->w > 64) {
       scanline = (float *) STBTT_malloc((result->w*2+1) * sizeof(float), userdata);
-   else
+      if (!scanline)
+         return;
+   } else {
       scanline = scanline_data;
+   }
 
    scanline2 = scanline + result->w;
 
@@ -2105,6 +2113,8 @@ static void stbtt__rasterize_sorted_edges(stbtt__bitmap *result, stbtt__edge *e,
       while (e->y0 <= scan_y_bottom) {
          if (e->y0 != e->y1) {
             stbtt__active_edge *z = stbtt__new_active(&hh, e, off_x, scan_y_top, userdata);
+            if (!z)
+               return;
             STBTT_assert(z->ey >= scan_y_top);
             // insert at front
             z->next = active;
diff --git a/drivers/video/stm32/stm32_dsi.c b/drivers/video/stm32/stm32_dsi.c
index 134abd93e1..5871ac7c4f 100644
--- a/drivers/video/stm32/stm32_dsi.c
+++ b/drivers/video/stm32/stm32_dsi.c
@@ -433,19 +433,17 @@ static int stm32_dsi_probe(struct udevice *dev)
 		return -EINVAL;
 	}
 
-	if (IS_ENABLED(CONFIG_DM_REGULATOR)) {
-		ret =  device_get_supply_regulator(dev, "phy-dsi-supply",
-						   &priv->vdd_reg);
-		if (ret && ret != -ENOENT) {
-			dev_err(dev, "Warning: cannot get phy dsi supply\n");
-			return -ENODEV;
-		}
+	ret =  device_get_supply_regulator(dev, "phy-dsi-supply",
+					   &priv->vdd_reg);
+	if (ret && ret != -ENOENT) {
+		dev_err(dev, "Warning: cannot get phy dsi supply\n");
+		return -ENODEV;
+	}
 
-		if (ret != -ENOENT) {
-			ret = regulator_set_enable(priv->vdd_reg, true);
-			if (ret)
-				return ret;
-		}
+	if (ret != -ENOENT) {
+		ret = regulator_set_enable(priv->vdd_reg, true);
+		if (ret)
+			return ret;
 	}
 
 	ret = clk_get_by_name(device->dev, "pclk", &clk);
@@ -493,8 +491,7 @@ static int stm32_dsi_probe(struct udevice *dev)
 err_clk:
 	clk_disable(&clk);
 err_reg:
-	if (IS_ENABLED(CONFIG_DM_REGULATOR))
-		regulator_set_enable(priv->vdd_reg, false);
+	regulator_set_enable(priv->vdd_reg, false);
 
 	return ret;
 }