Messages in this thread |  | | From | Martin Blumenstingl <> | Subject | [RFC v1 0/2] dwmac-meson8b Ethernet RX delay configuration | Date | Thu, 26 Dec 2019 21:36:53 +0100 |
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The Ethernet TX performance has been historically bad on Meson8b and Meson8m2 SoCs because high packet loss was seen. I found out that this was related (yet again) to the RGMII TX delay configuration. In the process of discussing the big picture (and not just a single patch) [0] with Andrew I discovered that the IP block behind the dwmac-meson8b driver actually seems to support the configuration of the RGMII RX delay (at least on the Meson8b SoC generation).
The goal of this series is to start the discussion around how to implement the RGMII RX delay on this IP block. Additionally it seems that the RX delay can also be applied for RMII PHYs?
@Jianxin: can you please add the Amlogic internal Ethernet team to this discussion? My questions are documented in the patch description of patch #2.
Dependencies: this series is based on my other series [1] "net: stmmac: dwmac-meson8b: Fix the RGMII TX delay on Meson8b/8m2 SoCs"
@David: please do NOT merge this series yet, it's only meant for discussion in it's current state!
[0] https://patchwork.kernel.org/patch/11309891/ [1] https://patchwork.kernel.org/patch/11310669/
Martin Blumenstingl (2): net: stmmac: dwmac-meson8b: use FIELD_PREP instead of open-coding it net: stmmac: dwmac-meson8b: add support for the RX delay configuration
.../ethernet/stmicro/stmmac/dwmac-meson8b.c | 60 ++++++++++--------- 1 file changed, 33 insertions(+), 27 deletions(-)
-- 2.24.1
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