r8152 SFP support

Hello,
I'm using a USB Type-C to SFP adapter based on the RTL8153 chip
(driver: r8152) on Linux. The adapter has an SFP cage and I'm trying
to read the module's DDM/DOM diagnostics (TX/RX optical power, bias
current, temperature, voltage) via the standard ethtool interface.
Device info:
lsusb: Bus 003 Device 005: ID 0bda:8153 Realtek Semiconductor Corp.
RTL8153 Gigabit Ethernet Adapter
Interface name: enp0s20f0u3
Driver version: r8152 v1.12.13 (vermagic: 6.12.101+deb13-amd64 SMP
preempt mod_unload modversions)
What I observe:
ethtool -m enp0s20f0u3
Netlink error: Operation not supported
Checking dmesg immediately after the call shows no driver activity at
all related to this request — the call appears to be rejected before
any USB transaction is attempted, which suggests get_module_eeprom,
get_module_info is simply not implemented in struct ethtool_ops for
this driver.
I noticed that get_module support was recently added for RTL8127 (a
different chip, r8169 driver) — the patch "r8169: implement get_module
functions for rtl8127atf" (Fabio Baltieri, April 2026). I'm writing to
ask:
Is there any plan to implement get_module_eeprom, get_module_info (or
the newer get_module_eeprom_by_page) for RTL8153 in the r8152 driver?
Does the RTL8153 hardware even expose the SFP cage's I2C/TWSI lines to
the host in a way that would make this feasible, or are they only used
internally by the chip (e.g., shared with the chip's own EEPROM
interface)?
Is there any existing internal Realtek tool (even
unofficial/Windows-only) used for production testing of RTL8153-based
SFP adapters that reads DDM data, which could inform an
implementation?
Happy to test any patch or provide further debugging information (USB
captures, register dumps, etc.) if that would help.
Thank you for your time.