linux-kernel - Re: [PATCH] drm/i2c: tda998x: select CONFIG_DRM_KMS

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Message-ID: <0ca61f1e-ec51-4335-a74e-7337aad5219c@linaro.org>
Date: Tue, 25 Mar 2025 08:35:00 +0100
From: Neil Armstrong <neil.armstrong@...aro.org>
To: Arnd Bergmann <arnd@...nel.org>, Andrzej Hajda <andrzej.hajda@...el.com>,
 Robert Foss <rfoss@...nel.org>,
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>,
 David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
 Dmitry Baryshkov <lumag@...nel.org>,
 Laurent Pinchart <laurent.pinchart@...asonboard.com>,
 Liviu Dudau <liviu.dudau@....com>
Cc: Arnd Bergmann <arnd@...db.de>, Jonas Karlman <jonas@...boo.se>,
 Jernej Skrabec <jernej.skrabec@...il.com>,
 Jani Nikula <jani.nikula@...el.com>,
 Geert Uytterhoeven <geert+renesas@...der.be>, Liu Ying <victor.liu@....com>,
 dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm/i2c: tda998x: select CONFIG_DRM_KMS_HELPER

On 24/03/2025 22:08, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@...db.de>
> 
> This fails to build without the KMS helper functions:
> 
> x86_64-linux-ld: drivers/gpu/drm/bridge/tda998x_drv.o: in function `tda998x_detect_work':
> tda998x_drv.c:(.text+0x4e6): undefined reference to `drm_kms_helper_hotplug_event'
> x86_64-linux-ld: drivers/gpu/drm/bridge/tda998x_drv.o: in function `tda998x_bind':
> tda998x_drv.c:(.text.unlikely+0x33): undefined reference to `drm_simple_encoder_init'
> x86_64-linux-ld: drivers/gpu/drm/bridge/tda998x_drv.o:(.rodata+0x584): undefined reference to `drm_atomic_helper_connector_reset'
> x86_64-linux-ld: drivers/gpu/drm/bridge/tda998x_drv.o:(.rodata+0x590): undefined reference to `drm_helper_probe_single_connector_modes'
> x86_64-linux-ld: drivers/gpu/drm/bridge/tda998x_drv.o:(.rodata+0x5a4): undefined reference to `drm_atomic_helper_connector_duplicate_state'
> x86_64-linux-ld: drivers/gpu/drm/bridge/tda998x_drv.o:(.rodata+0x5a8): undefined reference to `drm_atomic_helper_connector_destroy_state'
> 
> Select the missing symbol and fix up the broken whitespace.
> 
> Fixes: 325ba852d148 ("drm/i2c: move TDA998x driver under drivers/gpu/drm/bridge")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> ---
>   drivers/gpu/drm/bridge/Kconfig | 13 +++++++------
>   1 file changed, 7 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig
> index d20f1646dac2..09a1be234f71 100644
> --- a/drivers/gpu/drm/bridge/Kconfig
> +++ b/drivers/gpu/drm/bridge/Kconfig
> @@ -91,12 +91,13 @@ config DRM_FSL_LDB
>   	  Support for i.MX8MP DPI-to-LVDS on-SoC encoder.
>   
>   config DRM_I2C_NXP_TDA998X
> -       tristate "NXP Semiconductors TDA998X HDMI encoder"
> -       default m if DRM_TILCDC
> -       select CEC_CORE if CEC_NOTIFIER
> -       select SND_SOC_HDMI_CODEC if SND_SOC
> -       help
> -         Support for NXP Semiconductors TDA998X HDMI encoders.
> +	tristate "NXP Semiconductors TDA998X HDMI encoder"
> +	default m if DRM_TILCDC
> +	select CEC_CORE if CEC_NOTIFIER
> +	select DRM_KMS_HELPER
> +	select SND_SOC_HDMI_CODEC if SND_SOC
> +	help
> +	  Support for NXP Semiconductors TDA998X HDMI encoders.
>   
>   config DRM_ITE_IT6263
>   	tristate "ITE IT6263 LVDS/HDMI bridge"

Reviewed-by: Neil Armstrong <neil.armstrong@...aro.org>