[PATCH] [media] sti: hdmi: improve MEDIA_CEC_NOTIFIER dependency

[PATCH] [media] sti: hdmi: improve MEDIA_CEC_NOTIFIER dependency

[Arnd Bergmann]

When the media subsystem is built as a loadable module, a built-in
DRM driver cannot use the cec notifiers:

drivers/gpu/drm/sti/sti_hdmi.o: In function `sti_hdmi_remove':
sti_hdmi.c:(.text.sti_hdmi_remove+0x28): undefined reference to `cec_notifier_set_phys_addr'
sti_hdmi.c:(.text.sti_hdmi_remove+0x50): undefined reference to `cec_notifier_put'
drivers/gpu/drm/sti/sti_hdmi.o: In function `sti_hdmi_connector_get_modes':
sti_hdmi.c:(.text.sti_hdmi_connector_get_modes+0x84): undefined reference to `cec_notifier_set_phys_addr_from_edid'
drivers/gpu/drm/sti/sti_hdmi.o: In function `sti_hdmi_probe':
sti_hdmi.c:(.text.sti_hdmi_probe+0x1a8): undefined reference to `cec_notifier_get'
drivers/gpu/drm/sti/sti_hdmi.o: In function `sti_hdmi_connector_detect':
sti_hdmi.c:(.text.sti_hdmi_connector_detect+0x68): undefined reference to `cec_notifier_set_phys_addr'
drivers/gpu/drm/sti/sti_hdmi.o: In function `sti_hdmi_disable':
sti_hdmi.c:(.text.sti_hdmi_disable+0xec): undefined reference to `cec_notifier_set_phys_addr'

This adds a Kconfig dependency to enforce the HDMI driver to also
be a loadable module in this case.

Fixes: bca55958ea87 ("[media] sti: hdmi: add CEC notifier support")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/gpu/drm/sti/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/sti/Kconfig b/drivers/gpu/drm/sti/Kconfig
index acd72865feac..adac4c3e142e 100644
--- a/drivers/gpu/drm/sti/Kconfig
+++ b/drivers/gpu/drm/sti/Kconfig
@@ -1,6 +1,7 @@
 config DRM_STI
 	tristate "DRM Support for STMicroelectronics SoC stiH4xx Series"
 	depends on DRM && (ARCH_STI || ARCH_MULTIPLATFORM)
+	depends on (MEDIA_SUPPORT && MEDIA_CEC_NOTIFIER) || !MEDIA_CEC_NOTIFIER
 	select RESET_CONTROLLER
 	select DRM_KMS_HELPER
 	select DRM_GEM_CMA_HELPER
-- 
2.9.0

Re: [PATCH] [media] sti: hdmi: improve MEDIA_CEC_NOTIFIER dependency

[Hans Verkuil]

Hi Arnd,

On 19/04/17 18:59, Arnd Bergmann wrote:
> When the media subsystem is built as a loadable module, a built-in
> DRM driver cannot use the cec notifiers:
> 
> drivers/gpu/drm/sti/sti_hdmi.o: In function `sti_hdmi_remove':
> sti_hdmi.c:(.text.sti_hdmi_remove+0x28): undefined reference to `cec_notifier_set_phys_addr'
> sti_hdmi.c:(.text.sti_hdmi_remove+0x50): undefined reference to `cec_notifier_put'
> drivers/gpu/drm/sti/sti_hdmi.o: In function `sti_hdmi_connector_get_modes':
> sti_hdmi.c:(.text.sti_hdmi_connector_get_modes+0x84): undefined reference to `cec_notifier_set_phys_addr_from_edid'
> drivers/gpu/drm/sti/sti_hdmi.o: In function `sti_hdmi_probe':
> sti_hdmi.c:(.text.sti_hdmi_probe+0x1a8): undefined reference to `cec_notifier_get'
> drivers/gpu/drm/sti/sti_hdmi.o: In function `sti_hdmi_connector_detect':
> sti_hdmi.c:(.text.sti_hdmi_connector_detect+0x68): undefined reference to `cec_notifier_set_phys_addr'
> drivers/gpu/drm/sti/sti_hdmi.o: In function `sti_hdmi_disable':
> sti_hdmi.c:(.text.sti_hdmi_disable+0xec): undefined reference to `cec_notifier_set_phys_addr'
> 
> This adds a Kconfig dependency to enforce the HDMI driver to also
> be a loadable module in this case.

I've marked this patch and the exynos_hdmi patch as 'Obsoleted' in patchwork:
today several CEC Kconfig cleanup patches were merged that invalidate these
two patches. I expect they'll turn up soon in -next.

Regards,

	Hans

> 
> Fixes: bca55958ea87 ("[media] sti: hdmi: add CEC notifier support")
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> ---
>  drivers/gpu/drm/sti/Kconfig | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/gpu/drm/sti/Kconfig b/drivers/gpu/drm/sti/Kconfig
> index acd72865feac..adac4c3e142e 100644
> --- a/drivers/gpu/drm/sti/Kconfig
> +++ b/drivers/gpu/drm/sti/Kconfig
> @@ -1,6 +1,7 @@
>  config DRM_STI
>  	tristate "DRM Support for STMicroelectronics SoC stiH4xx Series"
>  	depends on DRM && (ARCH_STI || ARCH_MULTIPLATFORM)
> +	depends on (MEDIA_SUPPORT && MEDIA_CEC_NOTIFIER) || !MEDIA_CEC_NOTIFIER
>  	select RESET_CONTROLLER
>  	select DRM_KMS_HELPER
>  	select DRM_GEM_CMA_HELPER
> 

Re: [PATCH] [media] sti: hdmi: improve MEDIA_CEC_NOTIFIER dependency

[Arnd Bergmann]

On Wed, Apr 19, 2017 at 11:06 PM, Hans Verkuil <hverkuil@xs4all.nl> wrote:
> On 19/04/17 18:59, Arnd Bergmann wrote:
>> When the media subsystem is built as a loadable module, a built-in

>> This adds a Kconfig dependency to enforce the HDMI driver to also
>> be a loadable module in this case.
>
> I've marked this patch and the exynos_hdmi patch as 'Obsoleted' in patchwork:
> today several CEC Kconfig cleanup patches were merged that invalidate these
> two patches. I expect they'll turn up soon in -next.

I can confirm that the previous problems are fixed with today's linux-next,
but I have now run into another problem, with CONFIG_INPUT=m forcing
CONFIG_RC_CORE=m:

drivers/media/cec/cec-core.o: In function `cec_unregister_adapter':
cec-core.c:(.text.cec_unregister_adapter+0x18): undefined reference to
`rc_unregister_device'
drivers/media/cec/cec-core.o: In function `cec_delete_adapter':
cec-core.c:(.text.cec_delete_adapter+0x54): undefined reference to
`rc_free_device'
drivers/media/cec/cec-core.o: In function `cec_register_adapter':
cec-core.c:(.text.cec_register_adapter+0x94): undefined reference to
`rc_register_device'
cec-core.c:(.text.cec_register_adapter+0xa4): undefined reference to
`rc_free_device'
cec-core.c:(.text.cec_register_adapter+0x110): undefined reference to
`rc_unregister_device'
drivers/media/cec/cec-core.o: In function `cec_allocate_adapter':
cec-core.c:(.text.cec_allocate_adapter+0x234): undefined reference to
`rc_allocate_device'
drivers/media/cec/cec-adap.o: In function `cec_received_msg':
cec-adap.c:(.text.cec_received_msg+0x734): undefined reference to `rc_keydown'
cec-adap.c:(.text.cec_received_msg+0x768): undefined reference to `rc_keyup'
/git/arm-soc/Makefile:1033: recipe for target 'vmlinux' failed

I don't see an obvious fix for  this, and as you seem to have a good grip on the
problem already, I'll let you figure out how to best address it.

       Arnd