exynos drm build failure due to cec_* symbols

[Russell King - ARM Linux]

On Mon, Jun 05, 2017 at 10:33:50AM +0900, Inki Dae wrote:
> 2017년 06월 02일 22:58에 Andreas Färber 이(가) 쓴 글:
> > Hello,
> > 
> > We're observing the following build failure with v4.12-rc3, latest
> > linux.git and linux-next.git:
> > 
> > [ 9825s]   LD      vmlinux.o
> > [ 9904s]   MODPOST vmlinux.o
> > [ 9915s] drivers/built-in.o: In function `hdmi_get_modes':
> > [ 9915s]
> > /home/abuild/rpmbuild/BUILD/kernel-vanilla-4.12.rc3.51.ga374846/linux-4.12-rc3-51-ga374846/linux-obj/../drivers/gpu/drm/exynos/exynos_hdmi.c:866:
> > undefined reference to `cec_notifier_set_phys_addr_from_edid'
> > [ 9915s] drivers/built-in.o: In function `hdmi_remove':
> > [ 9915s]
> > /home/abuild/rpmbuild/BUILD/kernel-vanilla-4.12.rc3.51.ga374846/linux-4.12-rc3-51-ga374846/linux-obj/../drivers/gpu/drm/exynos/exynos_hdmi.c:1923:
> > undefined reference to `cec_notifier_set_phys_addr'
> > [ 9915s]
> > /home/abuild/rpmbuild/BUILD/kernel-vanilla-4.12.rc3.51.ga374846/linux-4.12-rc3-51-ga374846/linux-obj/../drivers/gpu/drm/exynos/exynos_hdmi.c:1927:
> > undefined reference to `cec_notifier_put'
> > [ 9915s] drivers/built-in.o: In function `hdmi_probe':
> > [ 9915s]
> > /home/abuild/rpmbuild/BUILD/kernel-vanilla-4.12.rc3.51.ga374846/linux-4.12-rc3-51-ga374846/linux-obj/../drivers/gpu/drm/exynos/exynos_hdmi.c:1889:
> > undefined reference to `cec_notifier_get'
> > [ 9915s]
> > /home/abuild/rpmbuild/BUILD/kernel-vanilla-4.12.rc3.51.ga374846/linux-4.12-rc3-51-ga374846/linux-obj/../drivers/gpu/drm/exynos/exynos_hdmi.c:1904:
> > undefined reference to `cec_notifier_put'
> > [ 9915s] drivers/built-in.o: In function `hdmi_disable':
> > [ 9915s]
> > /home/abuild/rpmbuild/BUILD/kernel-vanilla-4.12.rc3.51.ga374846/linux-4.12-rc3-51-ga374846/linux-obj/../drivers/gpu/drm/exynos/exynos_hdmi.c:1509:
> > undefined reference to `cec_notifier_set_phys_addr'
> > [ 9915s] drivers/built-in.o: In function `hdmi_detect':
> > [ 9915s]
> > /home/abuild/rpmbuild/BUILD/kernel-vanilla-4.12.rc3.51.ga374846/linux-4.12-rc3-51-ga374846/linux-obj/../drivers/gpu/drm/exynos/exynos_hdmi.c:827:
> > undefined reference to `cec_notifier_set_phys_addr'
> > [ 9931s] make[2]: ***
> > [/home/abuild/rpmbuild/BUILD/kernel-vanilla-4.12.rc3.51.ga374846/linux-4.12-rc3-51-ga374846/Makefile:997:
> > vmlinux] Error 1
> > [ 9931s] make[1]: *** [Makefile:152: sub-make] Error 2
> > [ 9931s] make: *** [Makefile:24: __sub-make] Error 2
> > 
> > My guess is the symbols used by the exynos drm module are not exported:
> > 
> > cec_notifier_set_phys_addr_from_edid
> > cec_notifier_set_phys_addr
> > cec_notifier_put
> > cec_notifier_get
> > 
> > Can you please look into fixing this?
> 
> Thanks for reporting.
> 
> Will check and fix it.

Please look at Hans' update to the way CEC's dependencies are handled.
https://git.linuxtv.org/hverkuil/media_tree.git/log/?h=drm-cec

These are apparently scheduled for -rc, but Mauro is busy.

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