With CONFIG_DRM_IMX8QM_LDB=m and CONFIG_DRM_IMX8QXP_LDB=y (or vice
versa), imx-ldb-helper.o is linked to a module and also to vmlinux
even though the expected CFLAGS are different between builtins and
modules.
This is the same situation as fixed by commit 637a642f5ca5 ("zstd:
Fixing mixed module-builtin objects").
Split imx-ldb-helper.c into a separate module.
Signed-off-by: Masahiro Yamada <masahiroy@xxxxxxxxxx>
Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
Reviewed-by: Liu Ying <victor.liu@xxxxxxx>
---
Changes in v3:
- Remove MODULE_ALIAS()
Changes in v2:
- Add a separate module instead of making the functions static inline
drivers/gpu/drm/bridge/imx/Kconfig | 5 +++++
drivers/gpu/drm/bridge/imx/Makefile | 5 +++--
drivers/gpu/drm/bridge/imx/imx-ldb-helper.c | 17 +++++++++++++++++
3 files changed, 25 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/bridge/imx/Kconfig b/drivers/gpu/drm/bridge/imx/Kconfig
index 608f47f41bcd..9fae28db6aa7 100644
--- a/drivers/gpu/drm/bridge/imx/Kconfig
+++ b/drivers/gpu/drm/bridge/imx/Kconfig
@@ -1,9 +1,13 @@
if ARCH_MXC || COMPILE_TEST
+config DRM_IMX_LDB_HELPER
+ tristate
+
config DRM_IMX8QM_LDB
tristate "Freescale i.MX8QM LVDS display bridge"
depends on OF
depends on COMMON_CLK
+ select DRM_IMX_LDB_HELPER
select DRM_KMS_HELPER
help
Choose this to enable the internal LVDS Display Bridge(LDB) found in
@@ -13,6 +17,7 @@ config DRM_IMX8QXP_LDB
tristate "Freescale i.MX8QXP LVDS display bridge"
depends on OF
depends on COMMON_CLK
+ select DRM_IMX_LDB_HELPER
select DRM_KMS_HELPER
help
Choose this to enable the internal LVDS Display Bridge(LDB) found in
diff --git a/drivers/gpu/drm/bridge/imx/Makefile b/drivers/gpu/drm/bridge/imx/Makefile
index aa90ec8d5433..5fc821278693 100644
--- a/drivers/gpu/drm/bridge/imx/Makefile
+++ b/drivers/gpu/drm/bridge/imx/Makefile
@@ -1,7 +1,8 @@
-imx8qm-ldb-objs := imx-ldb-helper.o imx8qm-ldb-drv.o
+obj-$(CONFIG_DRM_IMX_LDB_HELPER) += imx-ldb-helper.o
+imx8qm-ldb-objs := imx8qm-ldb-drv.o
obj-$(CONFIG_DRM_IMX8QM_LDB) += imx8qm-ldb.o
-imx8qxp-ldb-objs := imx-ldb-helper.o imx8qxp-ldb-drv.o
+imx8qxp-ldb-objs := imx8qxp-ldb-drv.o
obj-$(CONFIG_DRM_IMX8QXP_LDB) += imx8qxp-ldb.o
obj-$(CONFIG_DRM_IMX8QXP_PIXEL_COMBINER) += imx8qxp-pixel-combiner.o
diff --git a/drivers/gpu/drm/bridge/imx/imx-ldb-helper.c b/drivers/gpu/drm/bridge/imx/imx-ldb-helper.c
index 7338b84bc83d..6967325cd8ee 100644
--- a/drivers/gpu/drm/bridge/imx/imx-ldb-helper.c
+++ b/drivers/gpu/drm/bridge/imx/imx-ldb-helper.c
@@ -4,8 +4,10 @@
* Copyright 2019,2020,2022 NXP
*/
+#include <linux/export.h>
#include <linux/media-bus-format.h>
#include <linux/mfd/syscon.h>
+#include <linux/module.h>
#include <linux/of.h>
#include <linux/regmap.h>
@@ -19,12 +21,14 @@ bool ldb_channel_is_single_link(struct ldb_channel *ldb_ch)
{
return ldb_ch->link_type == LDB_CH_SINGLE_LINK;
}
+EXPORT_SYMBOL_GPL(ldb_channel_is_single_link);
bool ldb_channel_is_split_link(struct ldb_channel *ldb_ch)
{
return ldb_ch->link_type == LDB_CH_DUAL_LINK_EVEN_ODD_PIXELS ||
ldb_ch->link_type == LDB_CH_DUAL_LINK_ODD_EVEN_PIXELS;
}
+EXPORT_SYMBOL_GPL(ldb_channel_is_split_link);
int ldb_bridge_atomic_check_helper(struct drm_bridge *bridge,
struct drm_bridge_state *bridge_state,
@@ -38,6 +42,7 @@ int ldb_bridge_atomic_check_helper(struct drm_bridge *bridge,
return 0;
}
+EXPORT_SYMBOL_GPL(ldb_bridge_atomic_check_helper);
void ldb_bridge_mode_set_helper(struct drm_bridge *bridge,
const struct drm_display_mode *mode,
@@ -69,6 +74,7 @@ void ldb_bridge_mode_set_helper(struct drm_bridge *bridge,
break;
}
}
+EXPORT_SYMBOL_GPL(ldb_bridge_mode_set_helper);
void ldb_bridge_enable_helper(struct drm_bridge *bridge)
{
@@ -81,6 +87,7 @@ void ldb_bridge_enable_helper(struct drm_bridge *bridge)
*/
regmap_write(ldb->regmap, ldb->ctrl_reg, ldb->ldb_ctrl);
}
+EXPORT_SYMBOL_GPL(ldb_bridge_enable_helper);
void ldb_bridge_disable_helper(struct drm_bridge *bridge)
{
@@ -95,6 +102,7 @@ void ldb_bridge_disable_helper(struct drm_bridge *bridge)
regmap_write(ldb->regmap, ldb->ctrl_reg, ldb->ldb_ctrl);
}
+EXPORT_SYMBOL_GPL(ldb_bridge_disable_helper);
int ldb_bridge_attach_helper(struct drm_bridge *bridge,
enum drm_bridge_attach_flags flags)
@@ -117,6 +125,7 @@ int ldb_bridge_attach_helper(struct drm_bridge *bridge,
ldb_ch->next_bridge, bridge,
DRM_BRIDGE_ATTACH_NO_CONNECTOR);
}
+EXPORT_SYMBOL_GPL(ldb_bridge_attach_helper);
int ldb_init_helper(struct ldb *ldb)
{
@@ -157,6 +166,7 @@ int ldb_init_helper(struct ldb *ldb)
return 0;
}
+EXPORT_SYMBOL_GPL(ldb_init_helper);
int ldb_find_next_bridge_helper(struct ldb *ldb)
{
@@ -184,6 +194,7 @@ int ldb_find_next_bridge_helper(struct ldb *ldb)
return 0;
}
+EXPORT_SYMBOL_GPL(ldb_find_next_bridge_helper);
void ldb_add_bridge_helper(struct ldb *ldb,
const struct drm_bridge_funcs *bridge_funcs)
@@ -204,6 +215,7 @@ void ldb_add_bridge_helper(struct ldb *ldb,
drm_bridge_add(&ldb_ch->bridge);
}
}
+EXPORT_SYMBOL_GPL(ldb_add_bridge_helper);
void ldb_remove_bridge_helper(struct ldb *ldb)
{
@@ -219,3 +231,8 @@ void ldb_remove_bridge_helper(struct ldb *ldb)
drm_bridge_remove(&ldb_ch->bridge);
}
}
+EXPORT_SYMBOL_GPL(ldb_remove_bridge_helper);
+
+MODULE_DESCRIPTION("i.MX8 LVDS Display Bridge(LDB)/Pixel Mapper bridge helper");
+MODULE_AUTHOR("Liu Ying <victor.liu@xxxxxxx>");
+MODULE_LICENSE("GPL");
--
2.39.2
