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22 lines
1.3 KiB
Diff
22 lines
1.3 KiB
Diff
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From 8c997be099769362cb201d360ad57b639e799e9e Mon Sep 17 00:00:00 2001
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From: newbloke82 <39644602+newbloke82@users.noreply.github.com>
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Date: Thu, 1 Oct 2020 19:16:35 +0200
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Subject: [PATCH] Update hy28b-overlay.dts
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My hy28b TFT stopped working on upgrade to 5.4 kernel. I had a whitescreen but no obvious errors when using 'sudo vcdbg log msg' or 'dmesg'. Both /dev/fb0 and /dev/fb1 were present. Followed this article on waveshare32b that 'reset_gpios needed to be 0 0 1 instead of 0 0 0' (https://forum.armbian.com/topic/13233-any-clues-for-the-creation-of-a-dtoverlay-for-fbtft-on-54y/). I applied a similar change to this dts file and compiled a new dtbo: 'dtc -O dtb -o hy28b.dtbo hy28b-overlay.dts'. Fixed my issue - may help others? I got from the 5.4 upgrade thread that other tft users are having issues with small tfts... https://www.raspberrypi.org/forums/viewtopic.php?f=29&t=269769&p=1706597&hilit=gpio#p1706597
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---
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arch/arm/boot/dts/overlays/hy28b-overlay.dts | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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--- a/arch/arm/boot/dts/overlays/hy28b-overlay.dts
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+++ b/arch/arm/boot/dts/overlays/hy28b-overlay.dts
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@@ -61,7 +61,7 @@
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fps = <50>;
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buswidth = <8>;
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startbyte = <0x70>;
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- reset-gpios = <&gpio 25 0>;
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+ reset-gpios = <&gpio 25 1>;
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led-gpios = <&gpio 18 1>;
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gamma = "04 1F 4 7 7 0 7 7 6 0\n0F 00 1 7 4 0 0 0 6 7";
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