1 files changed, 29 insertions, 0 deletions
diff --git a/zephyr/program/nissa/gothrax/src/hdmi.c b/zephyr/program/nissa/gothrax/src/hdmi.c
new file mode 100644
index 0000000000..5025472c6d
--- /dev/null
+++ b/zephyr/program/nissa/gothrax/src/hdmi.c
@@ -0,0 +1,29 @@
+/* Copyright 2022 The ChromiumOS Authors
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "nissa_hdmi.h"
+
+#include <cros_board_info.h>
+
+__override void nissa_configure_hdmi_power_gpios(void)
+{
+	/*
+	 * Nereid versions before 2 need hdmi-en-odl to be
+	 * pulled down to enable VCC on the HDMI port, but later
+	 * versions (and other boards) disconnect this so
+	 * the port's VCC directly follows en-rails-odl. Only
+	 * configure the GPIO if needed, to save power.
+	 */
+	uint32_t board_version = 0;
+
+	/* CBI errors ignored, will configure the pin */
+	cbi_get_board_version(&board_version);
+	if (board_version < 2) {
+		nissa_configure_hdmi_vcc();
+	}
+
+	/* Still always need core rails controlled */
+	nissa_configure_hdmi_rails();
+}