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| author | Oliver Graute <oliver.graute@kococonnector.com> | 2022-02-10 09:53:22 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-03-28 08:41:42 +0200 |
| commit | d1641f57a1687206d1703605c8e960d716c96144 (patch) | |
| tree | 809d4f9714bfb0c9b61999da506e60d5b5f25427 | |
| parent | ce89087966651ad41e103770efc5ce2742046284 (diff) | |
| download | linux-stable-d1641f57a1687206d1703605c8e960d716c96144.tar.gz linux-stable-d1641f57a1687206d1703605c8e960d716c96144.tar.bz2 linux-stable-d1641f57a1687206d1703605c8e960d716c96144.zip | |
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 <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>
| -rw-r--r-- | drivers/staging/fbtft/fb_st7789v.c | 2 |
1 files changed, 2 insertions, 0 deletions
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); |