net: stmmac: handle integrated PCS phy_intf_sel separately

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The dwmac core has no support for SGMII without using its integrated
PCS. Thus, PHY_INTF_SEL_SGMII is only supported when this block is
present, and it makes no sense for stmmac_get_phy_intf_sel() to decode
this.

None of the platform glue users that use stmmac_get_phy_intf_sel()
directly accept PHY_INTF_SEL_SGMII as a valid mode.

Check whether a PCS will be used by the driver for the interface mode,
and if it is the integrated PCS, query the integrated PCS for the
phy_intf_sel_i value to use.

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Tested-by: Mohd Ayaan Anwar <mohd.anwar@oss.qualcomm.com>
Link: https://patch.msgid.link/E1vlmOa-00000006zvB-1fIe@rmk-PC.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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Russell King (Oracle) 2026-01-30 11:10:36 +00:00 • committed by Jakub Kicinski

parent eb4a1fda2c

commit 69a586e886

3 changed files with 23 additions and 3 deletions

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15

drivers/net/ethernet/stmicro/stmmac/stmmac_main.c

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9

drivers/net/ethernet/stmicro/stmmac/stmmac_pcs.c

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2

drivers/net/ethernet/stmicro/stmmac/stmmac_pcs.h

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