4.9-stable patches

added patches:
	staging-fbtft-fb_st7789v-reset-display-before-initialization.patch

diff --git a/queue-4.9/series b/queue-4.9/series
index 4d0b0d0004e4a29ed3dc8e30219a8074f7ecce0e..8df2c63b9c529926e3a417dfd7641c8bab328141 100644 (file)
--- a/queue-4.9/series
+++ b/queue-4.9/series
@@ -1,2 +1,3 @@
 nfc-st21nfca-fix-potential-buffer-overflows-in-evt_transaction.patch
 net-ipv6-fix-skb_over_panic-in-__ip6_append_data.patch
+staging-fbtft-fb_st7789v-reset-display-before-initialization.patch

diff --git a/queue-4.9/staging-fbtft-fb_st7789v-reset-display-before-initialization.patch b/queue-4.9/staging-fbtft-fb_st7789v-reset-display-before-initialization.patch
new file mode 100644 (file)
index 0000000..ad54a4d
--- /dev/null
+++ b/queue-4.9/staging-fbtft-fb_st7789v-reset-display-before-initialization.patch
@@ -0,0 +1,35 @@
+From b6821b0d9b56386d2bf14806f90ec401468c799f Mon Sep 17 00:00:00 2001
+From: Oliver Graute <oliver.graute@kococonnector.com>
+Date: Thu, 10 Feb 2022 09:53:22 +0100
+Subject: staging: fbtft: fb_st7789v: reset display before initialization
+
+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(+)
+
+--- 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);