linux-kernel - [PATCH] ARM: dts: davinci: da850-evm: Increase fifo threshold

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Message-ID: <20250504102959.81830-1-aford173@gmail.com>
Date: Sun,  4 May 2025 05:29:59 -0500
From: Adam Ford <aford173@...il.com>
To: linux-arm-kernel@...ts.infradead.org
Cc: aford@...conembedded.com,
	Adam Ford <aford173@...il.com>,
	Bartosz Golaszewski <brgl@...ev.pl>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] ARM: dts: davinci: da850-evm: Increase fifo threshold

When operating at low speeds, the display may throw an underflow
error and the display itself goes blank.  Increasing the fifo-th
value appears to correct this problem and the display can now
operate when the system is operating at speeds as low as 100MHz.

Signed-off-by: Adam Ford <aford173@...il.com>

diff --git a/arch/arm/boot/dts/ti/davinci/da850-evm.dts b/arch/arm/boot/dts/ti/davinci/da850-evm.dts
index 1f5cd35f8b74..38a191fb0414 100644
--- a/arch/arm/boot/dts/ti/davinci/da850-evm.dts
+++ b/arch/arm/boot/dts/ti/davinci/da850-evm.dts
@@ -60,7 +60,7 @@ panel-info {
 			sync-edge = <0>;
 			sync-ctrl = <1>;
 			raster-order = <0>;
-			fifo-th = <0>;
+			fifo-th = <1>;
 		};
 
 		display-timings {
-- 
2.48.1