Hi Eugeniy,

Apologies, somehow I missed your mail. I looked at the code again, and I
think I fumbled something. Does the below diff help to prevent the issues?

Thanks, Daniel


diff --git a/drivers/gpu/drm/tiny/arcpgu.c b/drivers/gpu/drm/tiny/arcpgu.c
index 857812f25bec..33d812a5ad7f 100644
--- a/drivers/gpu/drm/tiny/arcpgu.c
+++ b/drivers/gpu/drm/tiny/arcpgu.c
@@ -228,6 +228,9 @@ static void arc_pgu_update(struct drm_simple_display_pipe 
*pipe,
        struct arcpgu_drm_private *arcpgu;
        struct drm_gem_cma_object *gem;
 
+       if (!pipe->plane.state->fb)
+               return;
+
        arcpgu = pipe_to_arcpgu_priv(pipe);
        gem = drm_fb_cma_get_gem_obj(pipe->plane.state->fb, 0);
        arc_pgu_write(arcpgu, ARCPGU_REG_BUF0_ADDR, gem->paddr);
-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch
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