Thread (2 messages) flat view 2 messages, 2 authors, 2021-08-13
STALE1869d

[PATCH v1] staging: fbtft: fb_st7789v: reset display before initialization

From: Oliver Graute <hidden>
Date: 2021-08-13 12:59:48
Also in: dri-devel, linux-staging, lkml
Subsystem: fbtft framebuffer drivers, staging subsystem, the rest · Maintainers: Andy Shevchenko, Greg Kroah-Hartman, Linus Torvalds

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.

Signed-off-by: Oliver Graute <redacted>
---
 drivers/staging/fbtft/fb_st7789v.c | 2 ++
 1 file changed, 2 insertions(+)
diff --git a/drivers/staging/fbtft/fb_st7789v.c b/drivers/staging/fbtft/fb_st7789v.c
index 3a280cc1892c..0a2dbed9ffc7 100644
--- a/drivers/staging/fbtft/fb_st7789v.c
+++ b/drivers/staging/fbtft/fb_st7789v.c
@@ -82,6 +82,8 @@ enum st7789v_command {
 {
 	int rc;

+	par->fbtftops.reset(par);
+
 	rc = init_tearing_effect_line(par);
 	if (rc)
 		return rc;
-- 
2.17.1
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