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net: airoha: Disable GDM2 forwarding before configuring GDM2 loopback

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Hw design requires to disable GDM2 forwarding before configuring GDM2
loopback in airoha_set_gdm2_loopback routine.

Fixes: 9cd451d414 ("net: airoha: Add loopback support for GDM2")
Tested-by: Madhur Agrawal <madhur.agrawal@airoha.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Link: https://patch.msgid.link/20260520-airoha-disable-gdm2-fwd-v1-1-1eeea5dffc2f@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Lorenzo Bianconi 2026-05-20 15:12:02 +02:00 committed by Jakub Kicinski
parent e46e6bc97f
commit 985d4a55e6
1 changed files with 6 additions and 4 deletions
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10
drivers/net/ethernet/airoha/airoha_eth.c
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@ -1793,11 +1793,8 @@ static int airoha_set_gdm2_loopback(struct airoha_gdm_port *port)
u32 val, pse_port, chan;
int i, src_port;
/* Forward the traffic to the proper GDM port */
pse_port = port->id == AIROHA_GDM3_IDX ? FE_PSE_PORT_GDM3
: FE_PSE_PORT_GDM4;
airoha_set_gdm_port_fwd_cfg(eth, REG_GDM_FWD_CFG(AIROHA_GDM2_IDX),
pse_port);
FE_PSE_PORT_DROP);
airoha_fe_clear(eth, REG_GDM_FWD_CFG(AIROHA_GDM2_IDX),
GDM_STRIP_CRC_MASK);
@ -1815,6 +1812,11 @@ static int airoha_set_gdm2_loopback(struct airoha_gdm_port *port)
GDM_SHORT_LEN_MASK | GDM_LONG_LEN_MASK,
FIELD_PREP(GDM_SHORT_LEN_MASK, 60) |
FIELD_PREP(GDM_LONG_LEN_MASK, AIROHA_MAX_MTU));
/* Forward the traffic to the proper GDM port */
pse_port = port->id == AIROHA_GDM3_IDX ? FE_PSE_PORT_GDM3
: FE_PSE_PORT_GDM4;
airoha_set_gdm_port_fwd_cfg(eth, REG_GDM_FWD_CFG(AIROHA_GDM2_IDX),
pse_port);
/* Disable VIP and IFC for GDM2 */
airoha_fe_clear(eth, REG_FE_VIP_PORT_EN, BIT(AIROHA_GDM2_IDX));