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FAILED: patch "[PATCH] staging: fbtft: fb_st7789v: reset display before" failed to apply to 4.14-stable tree

PATCH [email protected] 1 participant 1 message Feb 28, 2022

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The patch below does not apply to the 4.14-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From b6821b0d9b56386d2bf14806f90ec401468c799f Mon Sep 17 00:00:00 2001
From: Oliver Graute <[email protected]>
Date: Thu, 10 Feb 2022 09:53:22 +0100
Subject: [PATCH] staging: fbtft: fb_st7789v: reset display before
initialization

In rare cases the display is flipped or mirrored. This was observed more often in a low temperature environment. A clean reset on init_display() should help to get registers in a sane state.

Fixes ef8f317795da (staging: fbtft: use init function instead of init sequence)
drivers/staging/fbtft/fb_st7789v.c +2 -0
index abe9395a0aef..861a154144e6 100644
@@ -144,6 +144,8 @@ static int init_display(struct fbtft_par *par)
 {
 	int rc;
 
+	par->fbtftops.reset(par);
+
 	rc = init_tearing_effect_line(par);
 	if (rc)
 		return rc;