* FAILED: patch "[PATCH] staging: fbtft: fb_st7789v: reset display before" failed to apply to 4.9-stable tree
@ 2022-02-28 7:02 gregkh
0 siblings, 0 replies; only message in thread
From: gregkh @ 2022-02-28 7:02 UTC (permalink / raw)
To: oliver.graute, gregkh; +Cc: stable
The patch below does not apply to the 4.9-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 <stable@vger.kernel.org>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From b6821b0d9b56386d2bf14806f90ec401468c799f Mon Sep 17 00:00:00 2001
From: Oliver Graute <oliver.graute@kococonnector.com>
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)
Cc: stable@vger.kernel.org
Signed-off-by: Oliver Graute <oliver.graute@kococonnector.com>
Link: https://lore.kernel.org/r/20220210085322.15676-1-oliver.graute@kococonnector.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/staging/fbtft/fb_st7789v.c b/drivers/staging/fbtft/fb_st7789v.c
index abe9395a0aef..861a154144e6 100644
--- a/drivers/staging/fbtft/fb_st7789v.c
+++ b/drivers/staging/fbtft/fb_st7789v.c
@@ -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;
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2022-02-28 7:02 FAILED: patch "[PATCH] staging: fbtft: fb_st7789v: reset display before" failed to apply to 4.9-stable tree gregkh
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