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* [PATCH] drm: fb_helper: fix CONFIG_FB dependency
@ 2021-07-21 15:22 ` Arnd Bergmann
  0 siblings, 0 replies; 2+ messages in thread
From: Arnd Bergmann @ 2021-07-21 15:22 UTC (permalink / raw)
  To: Maarten Lankhorst, Maxime Ripard, Thomas Zimmermann,
	David Airlie, Daniel Vetter, Kees Cook
  Cc: Arnd Bergmann, Christian König, Alex Deucher,
	Noralf Trønnes, Deepak Rawat, Chris Wilson,
	Anitha Chrisanthus, dri-devel, linux-kernel

From: Arnd Bergmann <arnd@arndb.de>

With CONFIG_FB=m and CONFIG_DRM=y, we get a link error in the fb helper:

aarch64-linux-ld: drivers/gpu/drm/drm_fb_helper.o: in function `drm_fb_helper_alloc_fbi':
(.text+0x10cc): undefined reference to `framebuffer_alloc'

Tighten the dependency so it is only allowed in the case that DRM can
link against FB.

Fixes: f611b1e7624c ("drm: Avoid circular dependencies for CONFIG_FB")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/gpu/drm/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
index 7ff89690a976..061f4382c796 100644
--- a/drivers/gpu/drm/Kconfig
+++ b/drivers/gpu/drm/Kconfig
@@ -98,7 +98,7 @@ 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
+	depends on FB=y || FB=DRM
 	select DRM_KMS_HELPER
 	select FB_CFB_FILLRECT
 	select FB_CFB_COPYAREA
-- 
2.29.2


^ permalink raw reply related	[flat|nested] 2+ messages in thread

* [PATCH] drm: fb_helper: fix CONFIG_FB dependency
@ 2021-07-21 15:22 ` Arnd Bergmann
  0 siblings, 0 replies; 2+ messages in thread
From: Arnd Bergmann @ 2021-07-21 15:22 UTC (permalink / raw)
  To: Maarten Lankhorst, Maxime Ripard, Thomas Zimmermann,
	David Airlie, Daniel Vetter, Kees Cook
  Cc: Arnd Bergmann, linux-kernel, dri-devel, Chris Wilson,
	Deepak Rawat, Noralf Trønnes, Anitha Chrisanthus,
	Alex Deucher, Christian König

From: Arnd Bergmann <arnd@arndb.de>

With CONFIG_FB=m and CONFIG_DRM=y, we get a link error in the fb helper:

aarch64-linux-ld: drivers/gpu/drm/drm_fb_helper.o: in function `drm_fb_helper_alloc_fbi':
(.text+0x10cc): undefined reference to `framebuffer_alloc'

Tighten the dependency so it is only allowed in the case that DRM can
link against FB.

Fixes: f611b1e7624c ("drm: Avoid circular dependencies for CONFIG_FB")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/gpu/drm/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
index 7ff89690a976..061f4382c796 100644
--- a/drivers/gpu/drm/Kconfig
+++ b/drivers/gpu/drm/Kconfig
@@ -98,7 +98,7 @@ 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
+	depends on FB=y || FB=DRM
 	select DRM_KMS_HELPER
 	select FB_CFB_FILLRECT
 	select FB_CFB_COPYAREA
-- 
2.29.2


^ permalink raw reply related	[flat|nested] 2+ messages in thread

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2021-07-21 15:22 [PATCH] drm: fb_helper: fix CONFIG_FB dependency Arnd Bergmann
2021-07-21 15:22 ` Arnd Bergmann

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