linux-kernel - Re: [PATCH] [media] sti: hdmi: improve MEDIA_CEC

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Date:   Wed, 19 Apr 2017 23:06:21 +0200
From:   Hans Verkuil <hverkuil@...all.nl>
To:     Arnd Bergmann <arnd@...db.de>,
        Mauro Carvalho Chehab <mchehab@...pensource.com>
Cc:     Hans Verkuil <hans.verkuil@...co.com>, linux-media@...r.kernel.org,
        Benjamin Gaignard <benjamin.gaignard@...aro.org>,
        Vincent Abriou <vincent.abriou@...com>,
        David Airlie <airlied@...ux.ie>,
        Arnaud Pouliquen <arnaud.pouliquen@...com>,
        Peter Griffin <peter.griffin@...aro.org>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] [media] sti: hdmi: improve MEDIA_CEC_NOTIFIER dependency

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@...db.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
>