[PATCH] drm/stm: attach gem fence to atomic state

[Philippe CORNU]

Hi Lucas & Ahmad,

Many thanks for your patch,

Tested successfully on stm32mp157-dk2 (weston & drm).

Acked-by: Philippe Cornu <philippe.cornu at st.com>
Tested-by: Philippe Cornu <philippe.cornu at st.com>

Philippe :-)

On 7/12/19 10:42 AM, Lucas Stach wrote:
> From: Ahmad Fatoum <a.fatoum at pengutronix.de>
> 
> To properly synchronize with other devices the fence from the GEM
> object backing the framebuffer needs to be attached to the atomic
> state, so the commit work can wait on fence signaling.
> 
> Signed-off-by: Ahmad Fatoum <a.fatoum at pengutronix.de>
> Signed-off-by: Lucas Stach <l.stach at pengutronix.de>
> ---
>   drivers/gpu/drm/stm/ltdc.c | 2 ++
>   1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/gpu/drm/stm/ltdc.c b/drivers/gpu/drm/stm/ltdc.c
> index 2fe6c4a8d915..3ab4fbf8eb0d 100644
> --- a/drivers/gpu/drm/stm/ltdc.c
> +++ b/drivers/gpu/drm/stm/ltdc.c
> @@ -26,6 +26,7 @@
>   #include <drm/drm_fb_cma_helper.h>
>   #include <drm/drm_fourcc.h>
>   #include <drm/drm_gem_cma_helper.h>
> +#include <drm/drm_gem_framebuffer_helper.h>
>   #include <drm/drm_of.h>
>   #include <drm/drm_plane_helper.h>
>   #include <drm/drm_probe_helper.h>
> @@ -922,6 +923,7 @@ static const struct drm_plane_funcs ltdc_plane_funcs = {
>   };
>   
>   static const struct drm_plane_helper_funcs ltdc_plane_helper_funcs = {
> +	.prepare_fb = drm_gem_fb_prepare_fb,
>   	.atomic_check = ltdc_plane_atomic_check,
>   	.atomic_update = ltdc_plane_atomic_update,
>   	.atomic_disable = ltdc_plane_atomic_disable,
>