3156b53c2e
When the base sun4i DRM driver is built-in but the back-end is
a loadable module, we run into a link error:
drivers/gpu/drm/sun4i/sun4i_drv.o: In function `sun4i_drv_probe':
sun4i_drv.c:(.text+0x60c): undefined reference to `sun4i_frontend_of_table'
The dependency is a bit tricky, the best workaround I have come up
with is to use a Makefile hack to to interpret both
CONFIG_DRM_SUN4I_BACKEND=m and CONFIG_DRM_SUN4I_BACKEND=y
as a directive to build the front-end the same way as the main module.
Fixes: dd0421f47505 ("drm/sun4i: Add a driver for the display frontend")
Link: https://lore.kernel.org/lkml/20180301091908.zcptz3ezqr2c6ly5@flea/
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180706142847.2032381-1-arnd@arndb.de
43 lines
1.3 KiB
Makefile
43 lines
1.3 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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sun4i-backend-y += sun4i_backend.o sun4i_layer.o
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sun4i-frontend-y += sun4i_frontend.o
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sun4i-drm-y += sun4i_drv.o
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sun4i-drm-y += sun4i_framebuffer.o
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sun4i-drm-hdmi-y += sun4i_hdmi_ddc_clk.o
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sun4i-drm-hdmi-y += sun4i_hdmi_enc.o
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sun4i-drm-hdmi-y += sun4i_hdmi_i2c.o
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sun4i-drm-hdmi-y += sun4i_hdmi_tmds_clk.o
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sun8i-drm-hdmi-y += sun8i_dw_hdmi.o
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sun8i-drm-hdmi-y += sun8i_hdmi_phy.o
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sun8i-drm-hdmi-y += sun8i_hdmi_phy_clk.o
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sun8i-mixer-y += sun8i_mixer.o sun8i_ui_layer.o \
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sun8i_vi_layer.o sun8i_ui_scaler.o \
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sun8i_vi_scaler.o sun8i_csc.o
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sun4i-tcon-y += sun4i_crtc.o
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sun4i-tcon-y += sun4i_dotclock.o
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sun4i-tcon-y += sun4i_lvds.o
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sun4i-tcon-y += sun4i_tcon.o
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sun4i-tcon-y += sun4i_rgb.o
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sun6i-dsi-y += sun6i_mipi_dphy.o
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sun6i-dsi-y += sun6i_mipi_dsi.o
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obj-$(CONFIG_DRM_SUN4I) += sun4i-drm.o
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obj-$(CONFIG_DRM_SUN4I) += sun4i-tcon.o
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obj-$(CONFIG_DRM_SUN4I) += sun4i_tv.o
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obj-$(CONFIG_DRM_SUN4I) += sun6i_drc.o
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obj-$(CONFIG_DRM_SUN4I_BACKEND) += sun4i-backend.o
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ifdef CONFIG_DRM_SUN4I_BACKEND
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obj-$(CONFIG_DRM_SUN4I) += sun4i-frontend.o
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endif
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obj-$(CONFIG_DRM_SUN4I_HDMI) += sun4i-drm-hdmi.o
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obj-$(CONFIG_DRM_SUN6I_DSI) += sun6i-dsi.o
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obj-$(CONFIG_DRM_SUN8I_DW_HDMI) += sun8i-drm-hdmi.o
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obj-$(CONFIG_DRM_SUN8I_MIXER) += sun8i-mixer.o
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