From: Peter Ujfalusi <peter.ujfalusi@ti.com>
Date: Mon, 30 Sep 2019 11:54:50 +0300
Subject: ARM: dts: am4372: Set memory bandwidth limit for DISPC
Git-commit: f90ec6cdf674248dcad85bf9af6e064bf472b841
Patch-mainline: 5.4-rc2
References: bnc#1151927 5.3.8

Set memory bandwidth limit to filter out resolutions above 720p@60Hz to
avoid underflow errors due to the bandwidth needs of higher resolutions.

am43xx can not provide enough bandwidth to DISPC to correctly handle
'high' resolutions.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 arch/arm/boot/dts/am4372.dtsi |    2 ++
 1 file changed, 2 insertions(+)

--- a/arch/arm/boot/dts/am4372.dtsi
+++ b/arch/arm/boot/dts/am4372.dtsi
@@ -337,6 +337,8 @@
 				ti,hwmods = "dss_dispc";
 				clocks = <&disp_clk>;
 				clock-names = "fck";
+
+				max-memory-bandwidth = <230000000>;
 			};
 
 			rfbi: rfbi@4832a800 {