[stable 4.19][PATCH 1/4] ARM: dts: am4372: Set memory bandwidth limit for DISPC

[Mathieu Poirier]

From: Peter Ujfalusi <peter.ujfalusi@xxxxxx>

commit f90ec6cdf674248dcad85bf9af6e064bf472b841 upstream

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@xxxxxx>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@xxxxxx>
Signed-off-by: Tony Lindgren <tony@xxxxxxxxxxx>
Cc: stable <stable@xxxxxxxxxxxxxxx> # 4.19
Signed-off-by: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx>
---
 arch/arm/boot/dts/am4372.dtsi | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm/boot/dts/am4372.dtsi b/arch/arm/boot/dts/am4372.dtsi
index d4b7c59eec68..cf1e4f747242 100644
--- a/arch/arm/boot/dts/am4372.dtsi
+++ b/arch/arm/boot/dts/am4372.dtsi
@@ -1142,6 +1142,8 @@
 				ti,hwmods = "dss_dispc";
 				clocks = <&disp_clk>;
 				clock-names = "fck";
+
+				max-memory-bandwidth = <230000000>;
 			};
 
 			rfbi: rfbi@4832a800 {
-- 
2.17.1