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Christian Marangi
5b25d4235d
Backport GDM2 loopback fixup for Ethernet driver. This should be the last patch before introduction of Multi-Serdes support series. Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
46 lines
1.8 KiB
Diff
46 lines
1.8 KiB
Diff
From 985d4a55e64e43bd86eeb896b81ceba453301989 Mon Sep 17 00:00:00 2001
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From: Lorenzo Bianconi <lorenzo@kernel.org>
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Date: Wed, 20 May 2026 15:12:02 +0200
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Subject: [PATCH] net: airoha: Disable GDM2 forwarding before configuring GDM2
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loopback
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Hw design requires to disable GDM2 forwarding before configuring GDM2
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loopback in airoha_set_gdm2_loopback routine.
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Fixes: 9cd451d414f6e ("net: airoha: Add loopback support for GDM2")
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Tested-by: Madhur Agrawal <madhur.agrawal@airoha.com>
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Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
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Link: https://patch.msgid.link/20260520-airoha-disable-gdm2-fwd-v1-1-1eeea5dffc2f@kernel.org
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Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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---
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drivers/net/ethernet/airoha/airoha_eth.c | 10 ++++++----
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1 file changed, 6 insertions(+), 4 deletions(-)
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--- a/drivers/net/ethernet/airoha/airoha_eth.c
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+++ b/drivers/net/ethernet/airoha/airoha_eth.c
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@@ -1790,11 +1790,8 @@ static int airoha_set_gdm2_loopback(stru
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u32 val, pse_port, chan;
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int i, src_port;
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- /* Forward the traffic to the proper GDM port */
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- pse_port = port->id == AIROHA_GDM3_IDX ? FE_PSE_PORT_GDM3
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- : FE_PSE_PORT_GDM4;
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airoha_set_gdm_port_fwd_cfg(eth, REG_GDM_FWD_CFG(AIROHA_GDM2_IDX),
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- pse_port);
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+ FE_PSE_PORT_DROP);
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airoha_fe_clear(eth, REG_GDM_FWD_CFG(AIROHA_GDM2_IDX),
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GDM_STRIP_CRC_MASK);
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@@ -1812,6 +1809,11 @@ static int airoha_set_gdm2_loopback(stru
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GDM_SHORT_LEN_MASK | GDM_LONG_LEN_MASK,
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FIELD_PREP(GDM_SHORT_LEN_MASK, 60) |
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FIELD_PREP(GDM_LONG_LEN_MASK, AIROHA_MAX_MTU));
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+ /* Forward the traffic to the proper GDM port */
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+ pse_port = port->id == AIROHA_GDM3_IDX ? FE_PSE_PORT_GDM3
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+ : FE_PSE_PORT_GDM4;
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+ airoha_set_gdm_port_fwd_cfg(eth, REG_GDM_FWD_CFG(AIROHA_GDM2_IDX),
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+ pse_port);
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/* Disable VIP and IFC for GDM2 */
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airoha_fe_clear(eth, REG_FE_VIP_PORT_EN, BIT(AIROHA_GDM2_IDX));
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