[PATCH] drm: rcar-du: clarify vsp dependency

[PATCH] drm: rcar-du: clarify vsp dependency

[Arnd Bergmann]

The VSP1 compositor code in DRM links against the respective V4L
driver, but the dependency is not expressed correctly in Kconfig,
which leads to a build error when the DRM driver is built-in
and the V4L driver is a module:

drivers/gpu/built-in.o: In function `rcar_du_vsp_plane_atomic_update':
rcar-du/rcar_du_vsp.c:183: undefined reference to `vsp1_du_atomic_update'

This patch avoids the problem by ensuring that the DRM VSP code can
only be enabled if the V4L driver is linked into the kernel, or
both are loadable modules.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 6d62ef3ac30b ("drm: rcar-du: Expose the VSP1 compositor through KMS planes")
---
 drivers/gpu/drm/rcar-du/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/rcar-du/Kconfig b/drivers/gpu/drm/rcar-du/Kconfig
index 1f10fa0928b4..eb1e6d5cfed9 100644
--- a/drivers/gpu/drm/rcar-du/Kconfig
+++ b/drivers/gpu/drm/rcar-du/Kconfig
@@ -27,6 +27,6 @@ config DRM_RCAR_LVDS
 config DRM_RCAR_VSP
 	bool "R-Car DU VSP Compositor Support"
 	depends on DRM_RCAR_DU
-	depends on VIDEO_RENESAS_VSP1
+	depends on VIDEO_RENESAS_VSP1=y || (VIDEO_RENESAS_VSP1 && DRM_RCAR_DU=m)
 	help
 	  Enable support to expose the R-Car VSP Compositor as KMS planes.
-- 
2.7.0

[PATCH] drm: rcar-du: clarify vsp dependency

[Laurent Pinchart]

Hi Arnd,

Thank you for the patch.

On Friday 26 February 2016 12:52:20 Arnd Bergmann wrote:
> The VSP1 compositor code in DRM links against the respective V4L
> driver, but the dependency is not expressed correctly in Kconfig,
> which leads to a build error when the DRM driver is built-in
> and the V4L driver is a module:
> 
> drivers/gpu/built-in.o: In function `rcar_du_vsp_plane_atomic_update':
> rcar-du/rcar_du_vsp.c:183: undefined reference to `vsp1_du_atomic_update'
> 
> This patch avoids the problem by ensuring that the DRM VSP code can
> only be enabled if the V4L driver is linked into the kernel, or
> both are loadable modules.
> 
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> Fixes: 6d62ef3ac30b ("drm: rcar-du: Expose the VSP1 compositor through KMS
> planes")

Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

Dave, could you please queue this for v4.6 ?

> ---
>  drivers/gpu/drm/rcar-du/Kconfig | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/rcar-du/Kconfig
> b/drivers/gpu/drm/rcar-du/Kconfig index 1f10fa0928b4..eb1e6d5cfed9 100644
> --- a/drivers/gpu/drm/rcar-du/Kconfig
> +++ b/drivers/gpu/drm/rcar-du/Kconfig
> @@ -27,6 +27,6 @@ config DRM_RCAR_LVDS
>  config DRM_RCAR_VSP
>  	bool "R-Car DU VSP Compositor Support"
>  	depends on DRM_RCAR_DU
> -	depends on VIDEO_RENESAS_VSP1
> +	depends on VIDEO_RENESAS_VSP1=y || (VIDEO_RENESAS_VSP1 && DRM_RCAR_DU=m)
>  	help
>  	  Enable support to expose the R-Car VSP Compositor as KMS planes.

-- 
Regards,

Laurent Pinchart