[PATCH v7 03/13] drm/exynos: atomic phase 1: use drm_plane_helper_disable()

[Gustavo Padovan]

From: Gustavo Padovan <gustavo.pado...@collabora.co.uk>

The atomic helper to disable planes also uses the optional
.atomic_disable() helper. The unique operation it does is calling
.win_disable()

Signed-off-by: Gustavo Padovan <gustavo.padovan at collabora.co.uk>
Reviewed-by: Joonyoung Shim <jy0922.shim at samsung.com>
Tested-by: Tobias Jakobi <tjakobi at math.uni-bielefeld.de>
---
 drivers/gpu/drm/exynos/exynos_drm_plane.c | 32 ++++++++++++++++++-------------
 1 file changed, 19 insertions(+), 13 deletions(-)

diff --git a/drivers/gpu/drm/exynos/exynos_drm_plane.c 
b/drivers/gpu/drm/exynos/exynos_drm_plane.c
index b218b7a..a0fdfe2 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_plane.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_plane.c
@@ -67,6 +67,9 @@ int exynos_check_plane(struct drm_plane *plane, struct 
drm_framebuffer *fb)
        int nr;
        int i;

+       if (!fb)
+               return 0;
+
        nr = exynos_drm_fb_get_buf_cnt(fb);
        for (i = 0; i < nr; i++) {
                struct exynos_drm_gem_buf *buffer = exynos_drm_fb_buffer(fb, i);
@@ -162,21 +165,9 @@ exynos_update_plane(struct drm_plane *plane, struct 
drm_crtc *crtc,
                exynos_crtc->ops->win_commit(exynos_crtc, exynos_plane->zpos);
 }

-static int exynos_disable_plane(struct drm_plane *plane)
-{
-       struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
-       struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(plane->crtc);
-
-       if (exynos_crtc && exynos_crtc->ops->win_disable)
-               exynos_crtc->ops->win_disable(exynos_crtc,
-                                             exynos_plane->zpos);
-
-       return 0;
-}
-
 static struct drm_plane_funcs exynos_plane_funcs = {
        .update_plane   = drm_plane_helper_update,
-       .disable_plane  = exynos_disable_plane,
+       .disable_plane  = drm_plane_helper_disable,
        .destroy        = drm_plane_cleanup,
 };

@@ -201,9 +192,24 @@ static void exynos_plane_atomic_update(struct drm_plane 
*plane,
                            state->src_w >> 16, state->src_h >> 16);
 }

+static void exynos_plane_atomic_disable(struct drm_plane *plane,
+                                       struct drm_plane_state *old_state)
+{
+       struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
+       struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(old_state->crtc);
+
+       if (!old_state->crtc)
+               return;
+
+       if (exynos_crtc->ops->win_disable)
+               exynos_crtc->ops->win_disable(exynos_crtc,
+                                             exynos_plane->zpos);
+}
+
 static const struct drm_plane_helper_funcs plane_helper_funcs = {
        .atomic_check = exynos_plane_atomic_check,
        .atomic_update = exynos_plane_atomic_update,
+       .atomic_disable = exynos_plane_atomic_disable,
 };

 static void exynos_plane_attach_zpos_property(struct drm_plane *plane,
-- 
2.1.0