From 4a24956f3a5d750e4038a317596023478789b692 Mon Sep 17 00:00:00 2001
From: CTCaer <ctcaer@gmail.com>
Date: Thu, 27 Nov 2025 12:04:12 +0200
Subject: [PATCH] bdk: fuse: allow overriding dram id fuses

This should be set before running sdram init.
fuse_read_dramid(true) will still return the real id.
---
 bdk/soc/fuse.c | 14 ++++++++++++++
 bdk/soc/fuse.h |  1 +
 2 files changed, 15 insertions(+)

diff --git a/bdk/soc/fuse.c b/bdk/soc/fuse.c
index 60d5355b..5fb2bec1 100644
--- a/bdk/soc/fuse.c
+++ b/bdk/soc/fuse.c
@@ -89,6 +89,14 @@ u32 fuse_read_odm_keygen_rev()
 	return 0;
 }
 
+static bool _dramid_8gb = false;
+
+void fuse_force_8gb_dramid()
+{
+	// Override fuse DRAM ID with a 8GB ID.
+	_dramid_8gb = true;
+}
+
 u32 fuse_read_dramid(bool raw_id)
 {
 	bool tegra_t210 = hw_get_chip_id() == GP_HIDREV_MAJOR_T210;
@@ -107,11 +115,17 @@ u32 fuse_read_dramid(bool raw_id)
 	{
 		if (dramid > 7)
 			dramid = 0;
+
+		if (_dramid_8gb)
+			dramid = 7;
 	}
 	else
 	{
 		if (dramid > 34)
 			dramid = 8;
+
+		if (_dramid_8gb)
+			dramid = 28;
 	}
 
 	return dramid;
diff --git a/bdk/soc/fuse.h b/bdk/soc/fuse.h
index 9dc4f6d0..2e5d1c2f 100644
--- a/bdk/soc/fuse.h
+++ b/bdk/soc/fuse.h
@@ -311,6 +311,7 @@ enum
 void fuse_disable_program();
 u32  fuse_read_odm(u32 idx);
 u32  fuse_read_odm_keygen_rev();
+void fuse_force_8gb_dramid();
 u32  fuse_read_dramid(bool raw_id);
 u32  fuse_read_hw_state();
 u32  fuse_read_hw_type();