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[4.14,006/119] ARM: dts: am4372: Set memory bandwidth limit for DISPC

Message ID 20191027203301.111830911@linuxfoundation.org
State New
Headers show
Series None | expand

Commit Message

Greg Kroah-Hartman Oct. 27, 2019, 8:59 p.m. UTC 
From: Peter Ujfalusi <peter.ujfalusi@ti.com>


[ 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@ti.com>

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

Signed-off-by: Tony Lindgren <tony@atomide.com>

Signed-off-by: Sasha Levin <sashal@kernel.org>

---
 arch/arm/boot/dts/am4372.dtsi | 2 ++
 1 file changed, 2 insertions(+)

-- 
2.20.1
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Patch

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 {