[PATCH] drm/rockchip: Add implicit fencing support for planes

[Neil Armstrong]

On 30/11/2018 11:24, Heiko Stuebner wrote:
> Render like lima will attach a fence to the framebuffer dma_buf,
> so the display driver should wait for it to finish before showing
> the framebufferto prevent tearing.
> 
> Generally tested on rk3188, rk3288, rk3328 and rk3399 and
> together with an actual lima-based kmscube on rk3188 and rk3328.
> 
> Suggested-by: Qiang Yu <yuq825 at gmail.com>
> Signed-off-by: Heiko Stuebner <heiko at sntech.de>
> ---
>  drivers/gpu/drm/rockchip/rockchip_drm_vop.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
> index fb70fb486fbf..db8358e6d230 100644
> --- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
> @@ -18,6 +18,7 @@
>  #include <drm/drm_crtc.h>
>  #include <drm/drm_crtc_helper.h>
>  #include <drm/drm_flip_work.h>
> +#include <drm/drm_gem_framebuffer_helper.h>
>  #include <drm/drm_plane_helper.h>
>  #ifdef CONFIG_DRM_ANALOGIX_DP
>  #include <drm/bridge/analogix_dp.h>
> @@ -823,6 +824,7 @@ static const struct drm_plane_helper_funcs plane_helper_funcs = {
>  	.atomic_check = vop_plane_atomic_check,
>  	.atomic_update = vop_plane_atomic_update,
>  	.atomic_disable = vop_plane_atomic_disable,
> +	.prepare_fb = drm_gem_fb_prepare_fb,
>  };
>  
>  static const struct drm_plane_funcs vop_plane_funcs = {
> 

Reviewed-by: Neil Armstrong <narmstrong at baylibre.com>