From: Oliver Graute <oliver.graute@kococonnector.com> stable inclusion from stable-v5.10.109 commit 56dc187b35d5a0ac9d08560684721abf3aefa4df bugzilla: https://gitee.com/openeuler/kernel/issues/I574AE Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=... -------------------------------- 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... [sudip: adjust context] Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Yu Liao <liaoyu15@huawei.com> Reviewed-by: Wei Li <liwei391@huawei.com> Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com> --- 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 { */ 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); -- 2.20.1