diff mbox series

[4.14,04/17] staging: fbtft: fb_st7789v: reset display before initialization

Message ID 20220325150416.889761289@linuxfoundation.org
State Superseded
Headers show
Series None | expand

Commit Message

gregkh@linuxfoundation.org March 25, 2022, 3:04 p.m. UTC 
From: Oliver Graute <oliver.graute@kococonnector.com>

commit b6821b0d9b56386d2bf14806f90ec401468c799f upstream.

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
[sudip: adjust context]
Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/staging/fbtft/fb_st7789v.c |    2 ++
 1 file changed, 2 insertions(+)
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Patch

--- a/drivers/staging/fbtft/fb_st7789v.c
+++ b/drivers/staging/fbtft/fb_st7789v.c
@@ -85,6 +85,8 @@  enum st7789v_command {
  */
 static int init_display(struct fbtft_par *par)
 {
+	par->fbtftops.reset(par);
+
 	/* turn off sleep mode */
 	write_reg(par, MIPI_DCS_EXIT_SLEEP_MODE);
 	mdelay(120);