From: Oliver Graute Date: Thu, 10 Feb 2022 08:53:22 +0000 (+0100) Subject: staging: fbtft: fb_st7789v: reset display before initialization X-Git-Tag: v5.4.188~22 X-Git-Url: https://git.fsl.cs.sunysb.edu/?a=commitdiff_plain;h=5ff048f4ab5cf6338fccbcc6354205287189c43c;p=wrapfs-5.3.y.git staging: fbtft: fb_st7789v: reset display before initialization 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 Link: https://lore.kernel.org/r/20220210085322.15676-1-oliver.graute@kococonnector.com [sudip: adjust context] Signed-off-by: Sudip Mukherjee Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/staging/fbtft/fb_st7789v.c b/drivers/staging/fbtft/fb_st7789v.c index 3c3f387936e8..30086ae03605 100644 --- a/drivers/staging/fbtft/fb_st7789v.c +++ b/drivers/staging/fbtft/fb_st7789v.c @@ -76,6 +76,8 @@ 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);