This is a note to let you know that I've just added the patch titled
drm/panel: Select DRM_DP_HELPER for DRM_PANEL_EDP
to the 5.15-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-select-drm_dp_helper-for-drm_panel_edp.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <sta...@vger.kernel.org> know about it.
>From 3755d35ee1d2454b20b8a1e20d790e56201678a4 Mon Sep 17 00:00:00 2001
From: Thomas Zimmermann <tzimmerm...@suse.de>
Date: Thu, 3 Feb 2022 10:39:22 +0100
Subject: drm/panel: Select DRM_DP_HELPER for DRM_PANEL_EDP
From: Thomas Zimmermann <tzimmerm...@suse.de>
commit 3755d35ee1d2454b20b8a1e20d790e56201678a4 upstream.
As reported in [1], DRM_PANEL_EDP depends on DRM_DP_HELPER. Select
the option to fix the build failure. The error message is shown
below.
arm-linux-gnueabihf-ld: drivers/gpu/drm/panel/panel-edp.o: in function
`panel_edp_probe': panel-edp.c:(.text+0xb74): undefined reference to
`drm_panel_dp_aux_backlight'
make[1]: *** [/builds/linux/Makefile:1222: vmlinux] Error 1
The issue has been reported before, when DisplayPort helpers were
hidden behind the option CONFIG_DRM_KMS_HELPER. [2]
v2:
* fix and expand commit description (Arnd)
Signed-off-by: Thomas Zimmermann <tzimmerm...@suse.de>
Fixes: 9d6366e743f3 ("drm: fb_helper: improve CONFIG_FB dependency")
Reported-by: Naresh Kamboju <naresh.kamb...@linaro.org>
Reported-by: Linux Kernel Functional Testing <l...@linaro.org>
Reviewed-by: Lyude Paul <ly...@redhat.com>
Acked-by: Sam Ravnborg <s...@ravnborg.org>
Link:
https://lore.kernel.org/dri-devel/CA+G9fYvN0NyaVkRQmA1O6rX7H8PPaZrUAD7=rdy33qy9ruu...@mail.gmail.com/
# [1]
Link: https://lore.kernel.org/all/20211117062704.14671-1-rdun...@infradead.org/
# [2]
Cc: Thomas Zimmermann <tzimmerm...@suse.de>
Cc: Lyude Paul <ly...@redhat.com>
Cc: Daniel Vetter <dan...@ffwll.ch>
Cc: Maarten Lankhorst <maarten.lankho...@linux.intel.com>
Cc: Maxime Ripard <mrip...@kernel.org>
Cc: dri-devel@lists.freedesktop.org
Link:
https://patchwork.freedesktop.org/patch/msgid/20220203093922.20754-1-tzimmerm...@suse.de
Signed-off-by: Dave Airlie <airl...@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/gpu/drm/panel/Kconfig | 1 +
1 file changed, 1 insertion(+)
--- a/drivers/gpu/drm/panel/Kconfig
+++ b/drivers/gpu/drm/panel/Kconfig
@@ -83,6 +83,7 @@ config DRM_PANEL_SIMPLE
depends on PM
select VIDEOMODE_HELPERS
select DRM_DP_AUX_BUS
+ select DRM_DP_HELPER
help
DRM panel driver for dumb panels that need at most a regulator and
a GPIO to be powered up. Optionally a backlight can be attached so
Patches currently in stable-queue which might be from tzimmerm...@suse.de are
queue-5.15/drm-panel-select-drm_dp_helper-for-drm_panel_edp.patch
