target/linux/generic/backport-5.15/733-v6.2-06-net-mtk_eth_soc-add-out-of-band-forcing-of-speed-and.patch

   1 From 12198c3a410fe69843e335c1bbf6d4c2a4d48e4e Mon Sep 17 00:00:00 2001
   2 From: "Russell King (Oracle)" <rmk+kernel@armlinux.org.uk>
   3 Date: Thu, 27 Oct 2022 14:11:03 +0100
   4 Subject: [PATCH 05/10] net: mtk_eth_soc: add out of band forcing of speed and
   5  duplex in pcs_link_up
   6
   7 Add support for forcing the link speed and duplex setting in the
   8 pcs_link_up() method for out of band modes, which will be useful when
   9 we finish converting the pcs_config() method. Until then, we still have
  10 to force duplex for 802.3z modes to work correctly.
  11
  12 Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
  13 Signed-off-by: Jakub Kicinski <kuba@kernel.org>
  14 ---
  15  drivers/net/ethernet/mediatek/mtk_sgmii.c | 28 ++++++++++++++---------
  16  1 file changed, 17 insertions(+), 11 deletions(-)
  17
  18 --- a/drivers/net/ethernet/mediatek/mtk_sgmii.c
  19 +++ b/drivers/net/ethernet/mediatek/mtk_sgmii.c
  20 @@ -108,17 +108,23 @@ static void mtk_pcs_link_up(struct phyli
  21         struct mtk_pcs *mpcs = pcs_to_mtk_pcs(pcs);
  22         unsigned int sgm_mode;
  23
  24 -       if (!phy_interface_mode_is_8023z(interface))
  25 -               return;
  26 +       if (!phylink_autoneg_inband(mode) ||
  27 +           phy_interface_mode_is_8023z(interface)) {
  28 +               /* Force the speed and duplex setting */
  29 +               if (speed == SPEED_10)
  30 +                       sgm_mode = SGMII_SPEED_10;
  31 +               else if (speed == SPEED_100)
  32 +                       sgm_mode = SGMII_SPEED_100;
  33 +               else
  34 +                       sgm_mode = SGMII_SPEED_1000;
  35
  36 -       /* SGMII force duplex setting */
  37 -       if (duplex == DUPLEX_FULL)
  38 -               sgm_mode = SGMII_DUPLEX_FULL;
  39 -       else
  40 -               sgm_mode = 0;
  41 +               if (duplex == DUPLEX_FULL)
  42 +                       sgm_mode |= SGMII_DUPLEX_FULL;
  43
  44 -       regmap_update_bits(mpcs->regmap, SGMSYS_SGMII_MODE,
  45 -                          SGMII_DUPLEX_FULL, sgm_mode);
  46 +               regmap_update_bits(mpcs->regmap, SGMSYS_SGMII_MODE,
  47 +                                  SGMII_DUPLEX_FULL | SGMII_SPEED_MASK,
  48 +                                  sgm_mode);
  49 +       }
  50  }
  51
  52  static const struct phylink_pcs_ops mtk_pcs_ops = {