This is a note to let you know that I've just added the patch titled
drm/panel: otm8009a: Set backlight parent to panel device
to the 4.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-panel-otm8009a-set-backlight-parent-to-panel-device.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From ab4f869fba6119997f7630d600049762a2b014fa Mon Sep 17 00:00:00 2001
From: James Cowgill <james.cowgill@xxxxxxxxxx>
Date: Wed, 12 Apr 2023 17:35:07 +0000
Subject: drm/panel: otm8009a: Set backlight parent to panel device
From: James Cowgill <james.cowgill@xxxxxxxxxx>
commit ab4f869fba6119997f7630d600049762a2b014fa upstream.
This is the logical place to put the backlight device, and it also
fixes a kernel crash if the MIPI host is removed. Previously the
backlight device would be unregistered twice when this happened - once
as a child of the MIPI host through `mipi_dsi_host_unregister`, and
once when the panel device is destroyed.
Fixes: 12a6cbd4f3f1 ("drm/panel: otm8009a: Use new backlight API")
Signed-off-by: James Cowgill <james.cowgill@xxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Reviewed-by: Neil Armstrong <neil.armstrong@xxxxxxxxxx>
Signed-off-by: Neil Armstrong <neil.armstrong@xxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20230412173450.199592-1-james.cowgill@xxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/panel/panel-orisetech-otm8009a.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/gpu/drm/panel/panel-orisetech-otm8009a.c
+++ b/drivers/gpu/drm/panel/panel-orisetech-otm8009a.c
@@ -454,7 +454,7 @@ static int otm8009a_probe(struct mipi_ds
ctx->panel.funcs = &otm8009a_drm_funcs;
ctx->bl_dev = devm_backlight_device_register(dev, dev_name(dev),
- dsi->host->dev, ctx,
+ dev, ctx,
&otm8009a_backlight_ops,
NULL);
if (IS_ERR(ctx->bl_dev)) {
Patches currently in stable-queue which might be from james.cowgill@xxxxxxxxxx are
queue-4.19/drm-panel-otm8009a-set-backlight-parent-to-panel-device.patch
