drm: renesas: rcar-du: Add drm_panic support for non-vsp

Add support for the drm_panic module for DU variants not using the
VSP-compositor, to display a message on the screen when a kernel panic
occurs.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Jocelyn Falempe <jfalempe@redhat.com>
Acked-by: Sui Jingfeng <sui.jingfeng@linux.dev>
Link: https://patchwork.freedesktop.org/patch/msgid/b633568d2e3f405b21debdd60854fe39780254d6.1716816897.git.geert+renesas@glider.be
Signed-off-by: Maxime Ripard <mripard@kernel.org>

diff --git a/drivers/gpu/drm/renesas/rcar-du/rcar_du_plane.c b/drivers/gpu/drm/renesas/rcar-du/rcar_du_plane.c
index e445fac..c546ab0 100644 (file)
--- a/drivers/gpu/drm/renesas/rcar-du/rcar_du_plane.c
+++ b/drivers/gpu/drm/renesas/rcar-du/rcar_du_plane.c
@@ -680,6 +680,12 @@ static const struct drm_plane_helper_funcs rcar_du_plane_helper_funcs = {
        .atomic_update = rcar_du_plane_atomic_update,
 };
 
+static const struct drm_plane_helper_funcs rcar_du_primary_plane_helper_funcs = {
+       .atomic_check = rcar_du_plane_atomic_check,
+       .atomic_update = rcar_du_plane_atomic_update,
+       .get_scanout_buffer = drm_fb_dma_get_scanout_buffer,
+};
+
 static struct drm_plane_state *
 rcar_du_plane_atomic_duplicate_state(struct drm_plane *plane)
 {
@@ -812,8 +818,12 @@ int rcar_du_planes_init(struct rcar_du_group *rgrp)
                if (ret < 0)
                        return ret;
 
-               drm_plane_helper_add(&plane->plane,
-                                    &rcar_du_plane_helper_funcs);
+               if (type == DRM_PLANE_TYPE_PRIMARY)
+                       drm_plane_helper_add(&plane->plane,
+                                            &rcar_du_primary_plane_helper_funcs);
+               else
+                       drm_plane_helper_add(&plane->plane,
+                                            &rcar_du_plane_helper_funcs);
 
                drm_plane_create_alpha_property(&plane->plane);