On 15. 11. 21, 18:05, Greg Kroah-Hartman wrote:
From: Arnd Bergmann <arnd@xxxxxxxx>
[ Upstream commit 9d6366e743f37d36ef69347924ead7bcc596076e ]
Hi,
this breaks build on openSUSE's armv7hl config:
$ wget -O .config
https://raw.githubusercontent.com/openSUSE/kernel-source/stable/config/armv7hl/default
$ make -j168 CROSS_COMPILE=arm-suse-linux-gnueabi- ARCH=arm vmlinux
...
LD .tmp_vmlinux.btf
arm-suse-linux-gnueabi-ld: drivers/gpu/drm/panel/panel-simple.o: in
function `panel_simple_probe':
drivers/gpu/drm/panel/panel-simple.c:803: undefined reference to
`drm_panel_dp_aux_backlight'
$ grep -E 'CONFIG_(DRM|FB|DRM_KMS_HELPER|DRM_FBDEV_EMULATION)\>' .config
CONFIG_DRM=y
CONFIG_DRM_KMS_HELPER=m
CONFIG_DRM_FBDEV_EMULATION=y
CONFIG_FB=y
5.16-rc1 builds just fine -- investigating why…
My previous patch correctly addressed the possible link failure, but as
Jani points out, the dependency is now stricter than it needs to be.
Change it again, to allow DRM_FBDEV_EMULATION to be used when
DRM_KMS_HELPER and FB are both loadable modules and DRM is linked into
the kernel.
As a side-effect, the option is now only visible when at least one DRM
driver makes use of DRM_KMS_HELPER. This is better, because the option
has no effect otherwise.
Fixes: 606b102876e3 ("drm: fb_helper: fix CONFIG_FB dependency")
Suggested-by: Acked-by: Jani Nikula <jani.nikula@xxxxxxxxx>
Reviewed-by: Javier Martinez Canillas <javierm@xxxxxxxxxx>
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20211029120307.1407047-1-arnd@xxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/gpu/drm/Kconfig | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
index 9199f53861cac..6ae4269118af3 100644
--- a/drivers/gpu/drm/Kconfig
+++ b/drivers/gpu/drm/Kconfig
@@ -102,9 +102,8 @@ config DRM_DEBUG_DP_MST_TOPOLOGY_REFS
config DRM_FBDEV_EMULATION
bool "Enable legacy fbdev support for your modesetting driver"
- depends on DRM
- depends on FB=y || FB=DRM
- select DRM_KMS_HELPER
+ depends on DRM_KMS_HELPER
+ depends on FB=y || FB=DRM_KMS_HELPER
select FB_CFB_FILLRECT
select FB_CFB_COPYAREA
select FB_CFB_IMAGEBLIT
--
js
suse labs
