[PATCH AUTOSEL 4.14 09/21] ARM: dts: am4372: Set memory bandwidth limit for DISPC

From: Sasha Levin
Date: Wed Oct 09 2019 - 13:26:45 EST


From: Peter Ujfalusi <peter.ujfalusi@xxxxxx>

[ Upstream commit f90ec6cdf674248dcad85bf9af6e064bf472b841 ]

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>
Signed-off-by: Sasha Levin <sashal@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 4714a59fd86df..345c117bd5ef5 100644
--- a/arch/arm/boot/dts/am4372.dtsi
+++ b/arch/arm/boot/dts/am4372.dtsi
@@ -1118,6 +1118,8 @@
ti,hwmods = "dss_dispc";
clocks = <&disp_clk>;
clock-names = "fck";
+
+ max-memory-bandwidth = <230000000>;
};

rfbi: rfbi@4832a800 {
--
2.20.1