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realtek: pcs: rtl930x: adjust initial vth_min value

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During RX calibration we use a vth_min value of 0 while the SDK always
uses a value of 1 [1]. While we do not know right now which effect this
really has, sync this to the SDK. In worst case we might have an
insufficient calibration result at the moment which usually might be
fine.

[1] 82af3a36b7/sources/rtk-dms1250/src/dal/longan/dal_longan_sds.c (L173)

Suggested-by: Bevan Weiss <bevan.weiss@gmail.com>
Signed-off-by: Jonas Jelonek <jelonek.jonas@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/22450
Signed-off-by: Robert Marko <robimarko@gmail.com>
This commit is contained in:
Jonas Jelonek 2026-03-18 11:24:19 +01:00 committed by Robert Marko
parent 6f4c431990
commit 2f74f9188f
1 changed files with 1 additions and 1 deletions
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target/linux/realtek/files-6.12/drivers/net/pcs/pcs-rtl-otto.c
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@ -2144,7 +2144,7 @@ static void rtpcs_930x_sds_do_rx_calibration_1(struct rtpcs_serdes *sds,
{
/* From both rtl9300_rxCaliConf_serdes_myParam and rtl9300_rxCaliConf_phy_myParam */
int tap0_init_val = 0x1f; /* Initial Decision Fed Equalizer 0 tap */
int vth_min = 0x0;
int vth_min = 0x1;
pr_info("start_1.1.1 initial value for sds %d\n", sds->id);
rtpcs_sds_write(sds, 6, 0, 0);