Having DRM_SUN4I built-in but DRM_SUN8I_MIXER as a loadable module results in
a link error, as we try to access a symbol from the sun8i_tcon_top.ko module:
ERROR: "sun8i_tcon_top_of_table" [drivers/gpu/drm/sun4i/sun8i-drm-hdmi.ko] undefined!
ERROR: "sun8i_tcon_top_of_table" [drivers/gpu/drm/sun4i/sun4i-drm.ko] undefined!
This solves the problem by making DRM_SUN8I_MIXER a 'bool' symbol, building
the sun8i_tcon_top module the same way as the core sun4i-drm module whenever
DRM_SUN8I_MIXER is enabled, or not building it at all otherwise.
Alternatively, we could always build sun8i_tcon_top.ko along with sun4-drm.ko
and detach it from the mixer module, I could not tell which way is more
appropriate here.
Fixes: 57e23de02f48 ("drm/sun4i: DW HDMI: Expand algorithm for possible crtcs")
Fixes: ef0cf6441fbb ("drm/sun4i: Add support for traversing graph with TCON TOP")
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
---
drivers/gpu/drm/sun4i/Kconfig | 2 +-
drivers/gpu/drm/sun4i/Makefile | 4 +++-
drivers/gpu/drm/sun4i/sun4i_drv.c | 3 ++-
drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c | 3 ++-
4 files changed, 8 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/sun4i/Kconfig b/drivers/gpu/drm/sun4i/Kconfig
index 156a865c3e6d..709461deb1c0 100644
--- a/drivers/gpu/drm/sun4i/Kconfig
+++ b/drivers/gpu/drm/sun4i/Kconfig
@@ -60,7 +60,7 @@ config DRM_SUN8I_DW_HDMI
selected the module will be called sun8i_dw_hdmi.
config DRM_SUN8I_MIXER
- tristate "Support for Allwinner Display Engine 2.0 Mixer"
+ bool "Support for Allwinner Display Engine 2.0 Mixer"
default MACH_SUN8I
help
Choose this option if you have an Allwinner SoC with the
diff --git a/drivers/gpu/drm/sun4i/Makefile b/drivers/gpu/drm/sun4i/Makefile
index cd27d02c94e2..11de3cd52dae 100644
--- a/drivers/gpu/drm/sun4i/Makefile
+++ b/drivers/gpu/drm/sun4i/Makefile
@@ -39,4 +39,6 @@ endif
obj-$(CONFIG_DRM_SUN4I_HDMI) += sun4i-drm-hdmi.o
obj-$(CONFIG_DRM_SUN6I_DSI) += sun6i-dsi.o
obj-$(CONFIG_DRM_SUN8I_DW_HDMI) += sun8i-drm-hdmi.o
-obj-$(CONFIG_DRM_SUN8I_MIXER) += sun8i-mixer.o sun8i_tcon_top.o
+ifdef CONFIG_DRM_SUN8I_MIXER
+obj-$(CONFIG_DRM_SUN4I) += sun8i-mixer.o sun8i_tcon_top.o
+endif
diff --git a/drivers/gpu/drm/sun4i/sun4i_drv.c b/drivers/gpu/drm/sun4i/sun4i_drv.c
index 6ddf4eaccb40..7551dcb34c71 100644
--- a/drivers/gpu/drm/sun4i/sun4i_drv.c
+++ b/drivers/gpu/drm/sun4i/sun4i_drv.c
@@ -216,7 +216,8 @@ static bool sun4i_drv_node_is_tcon_with_ch0(struct device_node *node)
static bool sun4i_drv_node_is_tcon_top(struct device_node *node)
{
- return !!of_match_node(sun8i_tcon_top_of_table, node);
+ return IS_ENABLED(CONFIG_DRM_SUN8I_MIXER) &&
+ !!of_match_node(sun8i_tcon_top_of_table, node);
}
static int compare_of(struct device *dev, void *data)
diff --git a/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c b/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c
index 3459b9ec56c9..b18c8f175dba 100644
--- a/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c
+++ b/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c
@@ -44,7 +44,8 @@ sun8i_dw_hdmi_mode_valid(struct drm_connector *connector,
static bool sun8i_dw_hdmi_node_is_tcon_top(struct device_node *node)
{
- return !!of_match_node(sun8i_tcon_top_of_table, node);
+ return IS_ENABLED(CONFIG_DRM_SUN8I_MIXER) &&
+ !!of_match_node(sun8i_tcon_top_of_table, node);
}
static u32 sun8i_dw_hdmi_find_possible_crtcs(struct drm_device *drm,
--
2.9.0
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