[PATCH] drm: of: fix link error

[PATCH] drm: of: fix link error

[Arnd Bergmann]

The new dummy helper is non-static, so every driver gets
its own copy, leading to a link failure:

drivers/gpu/drm/imx/imx-ldb.o: In function `drm_of_lvds_get_dual_link_pixel_order':
imx-ldb.c:(.text+0x140): multiple definition of `drm_of_lvds_get_dual_link_pixel_order'
drivers/gpu/drm/imx/imx-drm-core.o:imx-drm-core.c:(.text+0x330): first defined here
drivers/gpu/drm/imx/dw_hdmi-imx.o: In function `drm_of_lvds_get_dual_link_pixel_order':
dw_hdmi-imx.c:(.text+0xd0): multiple definition of `drm_of_lvds_get_dual_link_pixel_order'
drivers/gpu/drm/imx/imx-drm-core.o:imx-drm-core.c:(.text+0x330): first defined here
drivers/gpu/drm/bridge/synopsys/dw-hdmi.o: In function `drm_of_lvds_get_dual_link_pixel_order':
dw-hdmi.c:(.text+0x3b90): multiple definition of `drm_of_lvds_get_dual_link_pixel_order'
drivers/gpu/drm/imx/imx-drm-core.o:imx-drm-core.c:(.text+0x330): first defined here
drivers/gpu/drm/etnaviv/etnaviv_drv.o: In function `drm_of_lvds_get_dual_link_pixel_order':
etnaviv_drv.c:(.text+0x9d0): multiple definition of `drm_of_lvds_get_dual_link_pixel_order'
drivers/gpu/drm/imx/imx-drm-core.o:imx-drm-core.c:(.text+0x330): first defined here

Add the missing 'static' keyword.

Fixes: 6529007522de ("drm: of: Add drm_of_lvds_get_dual_link_pixel_order")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 include/drm/drm_of.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/drm/drm_of.h b/include/drm/drm_of.h
index 8ec7ca6d2369..3398be966021 100644
--- a/include/drm/drm_of.h
+++ b/include/drm/drm_of.h
@@ -92,7 +92,7 @@ static inline int drm_of_find_panel_or_bridge(const struct device_node *np,
 	return -EINVAL;
 }
 
-int drm_of_lvds_get_dual_link_pixel_order(const struct device_node *port1,
+static inline int drm_of_lvds_get_dual_link_pixel_order(const struct device_node *port1,
 					  const struct device_node *port2)
 {
 	return -EINVAL;
-- 
2.20.0

Re: [PATCH] drm: of: fix link error

[Laurent Pinchart]

Hi Arnd,

Thank you for the patch.

On Tue, Jan 07, 2020 at 10:37:32PM +0100, Arnd Bergmann wrote:
> The new dummy helper is non-static, so every driver gets
> its own copy, leading to a link failure:
> 
> drivers/gpu/drm/imx/imx-ldb.o: In function `drm_of_lvds_get_dual_link_pixel_order':
> imx-ldb.c:(.text+0x140): multiple definition of `drm_of_lvds_get_dual_link_pixel_order'
> drivers/gpu/drm/imx/imx-drm-core.o:imx-drm-core.c:(.text+0x330): first defined here
> drivers/gpu/drm/imx/dw_hdmi-imx.o: In function `drm_of_lvds_get_dual_link_pixel_order':
> dw_hdmi-imx.c:(.text+0xd0): multiple definition of `drm_of_lvds_get_dual_link_pixel_order'
> drivers/gpu/drm/imx/imx-drm-core.o:imx-drm-core.c:(.text+0x330): first defined here
> drivers/gpu/drm/bridge/synopsys/dw-hdmi.o: In function `drm_of_lvds_get_dual_link_pixel_order':
> dw-hdmi.c:(.text+0x3b90): multiple definition of `drm_of_lvds_get_dual_link_pixel_order'
> drivers/gpu/drm/imx/imx-drm-core.o:imx-drm-core.c:(.text+0x330): first defined here
> drivers/gpu/drm/etnaviv/etnaviv_drv.o: In function `drm_of_lvds_get_dual_link_pixel_order':
> etnaviv_drv.c:(.text+0x9d0): multiple definition of `drm_of_lvds_get_dual_link_pixel_order'
> drivers/gpu/drm/imx/imx-drm-core.o:imx-drm-core.c:(.text+0x330): first defined here
> 
> Add the missing 'static' keyword.
> 
> Fixes: 6529007522de ("drm: of: Add drm_of_lvds_get_dual_link_pixel_order")
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>

I've sent "[PATCH] drm: of: Fix linking when CONFIG_OF is not set" to
fix this issue, back on December the 19th. Daniel, Dave, could you pick
this up ? It couldn't be merged through drm-misc last time we checked as
the offending patch wasn't there.

> ---
>  include/drm/drm_of.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/include/drm/drm_of.h b/include/drm/drm_of.h
> index 8ec7ca6d2369..3398be966021 100644
> --- a/include/drm/drm_of.h
> +++ b/include/drm/drm_of.h
> @@ -92,7 +92,7 @@ static inline int drm_of_find_panel_or_bridge(const struct device_node *np,
>  	return -EINVAL;
>  }
>  
> -int drm_of_lvds_get_dual_link_pixel_order(const struct device_node *port1,
> +static inline int drm_of_lvds_get_dual_link_pixel_order(const struct device_node *port1,
>  					  const struct device_node *port2)
>  {
>  	return -EINVAL;

-- 
Regards,

Laurent Pinchart