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external/packages/bsp/rk356x/etc/X11/xorg.conf.d/20-modesetting.conf

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+Section "Device"
+    Identifier  "Rockchip Graphics"
+    Driver      "modesetting"
+
+### Use Rockchip RGA 2D HW accel
+#    Option      "AccelMethod"    "exa"
+
+### Use GPU HW accel
+    Option      "AccelMethod"    "glamor"
+
+    Option      "DRI"            "2"
+
+### Set to "always" to avoid tearing, could lead to up 50% performance loss
+    Option      "FlipFB"         "always"
+
+### Limit flip rate and drop frames for "FlipFB" to reduce performance lost
+#    Option      "MaxFlipRate"    "60"
+
+    Option      "NoEDID"         "true"
+    Option	"UseGammaLUT"	 "true"
+EndSection
+
+Section	"Screen"
+    Identifier	"Default Screen"
+    Device	"Rockchip Graphics"
+    Monitor	"Default Monitor"
+EndSection
+
+### Valid values for rotation are "normal", "left", "right"
+Section	"Monitor"
+    Identifier	"Default Monitor"
+    Option	"Rotate" "normal"
+EndSection