[RFC 14/28] drm: rcar-du: Allow DU plane feature based on DU feature bit

[Biju Das]

RZ/G2L LCDC does not have DU plane registers. This patch
supports DU planes only for the SoC's with plane feature
bit is set.

Signed-off-by: Biju Das <biju.das.jz at bp.renesas.com>
---
 drivers/gpu/drm/rcar-du/rcar_du_crtc.c | 3 +++
 drivers/gpu/drm/rcar-du/rcar_du_vsp.c  | 3 ++-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
index f361a604337f..521446890d3d 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
@@ -349,6 +349,9 @@ static void rcar_du_crtc_update_planes(struct rcar_du_crtc *rcrtc)
 	unsigned int i;
 	u32 dspr = 0;
 
+	if (!rcar_du_has(rcdu, RCAR_DU_FEATURE_PLANE))
+		return;
+
 	for (i = 0; i < rcrtc->group->num_planes; ++i) {
 		struct rcar_du_plane *plane = &rcrtc->group->planes[i];
 		unsigned int j;
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_vsp.c b/drivers/gpu/drm/rcar-du/rcar_du_vsp.c
index cf045a203aa5..364d0e911735 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_vsp.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_vsp.c
@@ -82,7 +82,8 @@ void rcar_du_vsp_enable(struct rcar_du_crtc *crtc)
 	else
 		state.hwindex = crtc->index % 2;
 
-	__rcar_du_plane_setup(crtc->group, &state);
+	if (rcar_du_has(rcdu, RCAR_DU_FEATURE_PLANE))
+		__rcar_du_plane_setup(crtc->group, &state);
 
 	/*
 	 * Ensure that the plane source configuration takes effect by requesting
-- 
2.17.1