From df58060a8bffa6edd380e33d95a237edef430a88 Mon Sep 17 00:00:00 2001
From: jsg <jsg@openbsd.org>
Date: Mon, 25 May 2026 09:40:09 +0000
Subject: [PATCH] drm/amd/display: Allow DCE link encoder without AUX registers

From Timur Kristof
9b84d67ce8c93770f5d42005ba82500ffa34dc39 in linux-6.18.y/6.18.33
ac27e3f99035f132f23bc0409d0e57f11f054c70 in mainline linux
---
 sys/dev/pci/drm/amd/display/dc/dce/dce_link_encoder.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sys/dev/pci/drm/amd/display/dc/dce/dce_link_encoder.c b/sys/dev/pci/drm/amd/display/dc/dce/dce_link_encoder.c
index c4325fd9b0e..6e60da84f4a 100644
--- a/sys/dev/pci/drm/amd/display/dc/dce/dce_link_encoder.c
+++ b/sys/dev/pci/drm/amd/display/dc/dce/dce_link_encoder.c
@@ -989,7 +989,9 @@ void dce110_link_encoder_hw_init(
 		ASSERT(result == BP_RESULT_OK);
 
 	}
-	aux_initialize(enc110);
+
+	if (enc110->aux_regs)
+		aux_initialize(enc110);
 
 	/* reinitialize HPD.
 	 * hpd_initialize() will pass DIG_FE id to HW context.