Re: [PATCH] drm/bridge: ti-sn65dsi86: Fix 0-day build error

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On 15.08.2018 21:49, Sean Paul wrote:
> From: Guenter Roeck <groeck@xxxxxxxxxxxx>
>
> 0day reports:
>
>>> drivers/gpu/drm/bridge/ti-sn65dsi86.o: In function
> `ti_sn_bridge_remove':
>>> drivers/gpu/drm/bridge/ti-sn65dsi86.c:629: undefined reference to
> `mipi_dsi_detach'
>>> drivers/gpu/drm/bridge/ti-sn65dsi86.c:630: undefined reference to
> `mipi_dsi_device_unregister'
>    drivers/gpu/drm/bridge/ti-sn65dsi86.o: In function
> `ti_sn_bridge_attach':
>>> drivers/gpu/drm/bridge/ti-sn65dsi86.c:249: undefined reference to
> `of_find_mipi_dsi_host_by_node'
>>> drivers/gpu/drm/bridge/ti-sn65dsi86.c:256: undefined reference to
> `mipi_dsi_device_register_full'
>>> drivers/gpu/drm/bridge/ti-sn65dsi86.c:276: undefined reference to
> `mipi_dsi_attach'
>    drivers/gpu/drm/bridge/ti-sn65dsi86.c:289: undefined reference to
> `mipi_dsi_device_unregister'
>
> Quite obviously the driver depends on DRM_MIPI_DSI.
> We can not use "depends" since the driver configuration uses "select",

Why?
As mentioned in other threads: select for DSI controllers, depends on -
for DSI peripherals.

Regards
Andrzej

> so we'll have to select the missing dependency instead.
>
> Cc: Sean Paul <seanpaul@xxxxxxxxxxxx>
> Cc: Dylan Reid <dgreid@xxxxxxxxxxxx>
> Signed-off-by: Guenter Roeck <groeck@xxxxxxxxxxxx>
> ---
>
> Originally uploaded here:
> https://chromium-review.googlesource.com/c/chromiumos/third_party/kernel/+/1176224
>
>
>  drivers/gpu/drm/bridge/Kconfig | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig
> index 9a455c5f24f0..9eeb8ef0b174 100644
> --- a/drivers/gpu/drm/bridge/Kconfig
> +++ b/drivers/gpu/drm/bridge/Kconfig
> @@ -142,6 +142,7 @@ config DRM_TI_SN65DSI86
>  	select DRM_KMS_HELPER
>  	select REGMAP_I2C
>  	select DRM_PANEL
> +	select DRM_MIPI_DSI
>  	help
>  	  Texas Instruments SN65DSI86 DSI to eDP Bridge driver
>  


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