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

Message ID 20191015065937.23169-1-mathieu.poirier@linaro.org
State New
Headers show
Series [stable,4.19,1/4] ARM: dts: am4372: Set memory bandwidth limit for DISPC | expand

Commit Message

Mathieu Poirier Oct. 15, 2019, 6:59 a.m. UTC 
From: Peter Ujfalusi <peter.ujfalusi@ti.com>


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@ti.com>

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

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

Cc: stable <stable@vger.kernel.org> # 4.19
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>

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

-- 
2.17.1
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Patch

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 {