FAILED: patch "[PATCH] staging: fbtft: fb_st7789v: reset display before" failed to apply to 5.10-stable tree

FAILED: patch "[PATCH] staging: fbtft: fb_st7789v: reset display before" failed to apply to 5.10-stable tree

[gregkh]

The patch below does not apply to the 5.10-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@vger.kernel.org>.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

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: [PATCH] staging: fbtft: fb_st7789v: reset display before
 initialization

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
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/fbtft/fb_st7789v.c b/drivers/staging/fbtft/fb_st7789v.c
index abe9395a0aef..861a154144e6 100644
--- a/drivers/staging/fbtft/fb_st7789v.c
+++ b/drivers/staging/fbtft/fb_st7789v.c
@@ -144,6 +144,8 @@ static int init_display(struct fbtft_par *par)
 {
 	int rc;
 
+	par->fbtftops.reset(par);
+
 	rc = init_tearing_effect_line(par);
 	if (rc)
 		return rc;

Re: FAILED: patch "[PATCH] staging: fbtft: fb_st7789v: reset display before" failed to apply to 5.10-stable tree

[Sudip Mukherjee]

[-- Attachment #1: Type: text/plain, Size: 411 bytes --]

Hi Greg,

On Mon, Feb 28, 2022 at 08:02:21AM +0100, gregkh@linuxfoundation.org wrote:
> 
> The patch below does not apply to the 5.10-stable tree.
> If someone wants it applied there, or to any other stable or longterm
> tree, then please email the backport, including the original git commit
> id to <stable@vger.kernel.org>.

Here is the backport. Will also apply to all other stable trees.

--
Regards
Sudip

[-- Attachment #2: 0001-staging-fbtft-fb_st7789v-reset-display-before-initia.patch --]
[-- Type: text/x-diff, Size: 1416 bytes --]

From dbe34d547c408290155c305f2cbd4a266c062391 Mon Sep 17 00:00:00 2001
From: Oliver Graute <oliver.graute@kococonnector.com>
Date: Thu, 10 Feb 2022 09:53:22 +0100
Subject: [PATCH] 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
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[sudip: adjust context]
Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@gmail.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);
-- 
2.30.2

Re: FAILED: patch "[PATCH] staging: fbtft: fb_st7789v: reset display before" failed to apply to 5.10-stable tree

[Greg KH]

On Wed, Mar 23, 2022 at 09:23:52PM +0000, Sudip Mukherjee wrote:
> Hi Greg,
> 
> On Mon, Feb 28, 2022 at 08:02:21AM +0100, gregkh@linuxfoundation.org wrote:
> > 
> > The patch below does not apply to the 5.10-stable tree.
> > If someone wants it applied there, or to any other stable or longterm
> > tree, then please email the backport, including the original git commit
> > id to <stable@vger.kernel.org>.
> 
> Here is the backport. Will also apply to all other stable trees.

All now queued up, thanks!

greg k-h