* [PATCH] ARM: dts: am4372: Set memory bandwidth limit for DISPC
@ 2019-09-30 8:54 Tomi Valkeinen
2019-09-30 16:32 ` Tony Lindgren
0 siblings, 1 reply; 2+ messages in thread
From: Tomi Valkeinen @ 2019-09-30 8:54 UTC (permalink / raw)
To: Tony Lindgren
Cc: devicetree, dri-devel, Peter Ujfalusi, Tomi Valkeinen,
linux-omap, linux-arm-kernel
From: Peter Ujfalusi <peter.ujfalusi@ti.com>
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>
---
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 848e2a8884e2..14bbc438055f 100644
--- 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 {
--
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^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] ARM: dts: am4372: Set memory bandwidth limit for DISPC
2019-09-30 8:54 [PATCH] ARM: dts: am4372: Set memory bandwidth limit for DISPC Tomi Valkeinen
@ 2019-09-30 16:32 ` Tony Lindgren
0 siblings, 0 replies; 2+ messages in thread
From: Tony Lindgren @ 2019-09-30 16:32 UTC (permalink / raw)
To: Tomi Valkeinen
Cc: Peter Ujfalusi, devicetree, linux-omap, dri-devel, linux-arm-kernel
* Tomi Valkeinen <tomi.valkeinen@ti.com> [190930 01:55]:
> From: Peter Ujfalusi <peter.ujfalusi@ti.com>
>
> 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.
Applying into fixes thanks.
Tony
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linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
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