From 842d68af97a9d3bf46cf19288220c93622895958 Mon Sep 17 00:00:00 2001
From: logicog <git@logicog.de>
Date: Mon, 15 Jun 2026 18:40:03 +0200
Subject: [PATCH] Add support for 100M on RTL8221B ports

---
 rtlplayground.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/rtlplayground.c b/rtlplayground.c
index 0f79a69..356ea9c 100644
--- a/rtlplayground.c
+++ b/rtlplayground.c
@@ -1406,9 +1406,9 @@ void idle(void)
 			cpy_4(linkbits_last, sfr_data);
 			// Handle link change of the RTL8221 PHY, adjust SDS mode, RTL8261BE always uses SDS_QXGMII
 			if (!machine.n_10g && p5_last != p5) {
-				if (p5 == 0x5) // 2.5GBit Mode
+				if (p5 == 0x5)	// 2.5GBit Mode
 					sds_config(0, SDS_HISGMII);
-				else if (p5 == 0x2) // 1GBit
+				else		// 1GBit and 100Mbit
 					sds_config(0, SDS_SGMII);
 			}
 			if (machine.n_10g)