From da7326322d31eb60fea27be30ca013d1e9b0a86c Mon Sep 17 00:00:00 2001 From: John Madieu Date: Thu, 14 Aug 2025 17:34:55 +0200 Subject: [PATCH] arm64: dts: renesas: r9a09g047: Enable Tx coe support The GBETH IPs found on RZ/G3E SoC family are compatible with the stmmac driver. They have a MAC HW feature register used by this driver to enable respective features. While the register advertises Tx coe support, it was not enabled by the driver due to the 'snps,force_thresh_dma_mode' dtsi property. Switch from 'snps,force_thresh_dma_mode' to 'snps,force_sf_dma_mode' to enable Tx checksum offload support on both GBETH IPs. While at it, also switch from 'snps,fixed-burst' to 'snps,mixed-burst' and remove 'snps,no-pbl-x8' for optimal DMA configuration. This improvement results in a measurable TCP Tx performance gain, increasing throughput by 20Mbps. Signed-off-by: John Madieu Reviewed-by: Geert Uytterhoeven Link: https://patch.msgid.link/20250814153456.268208-1-john.madieu.xa@bp.renesas.com Signed-off-by: Geert Uytterhoeven --- arch/arm64/boot/dts/renesas/r9a09g047.dtsi | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-) diff --git a/arch/arm64/boot/dts/renesas/r9a09g047.dtsi b/arch/arm64/boot/dts/renesas/r9a09g047.dtsi index e5b24e46d6457..47d843c790212 100644 --- a/arch/arm64/boot/dts/renesas/r9a09g047.dtsi +++ b/arch/arm64/boot/dts/renesas/r9a09g047.dtsi @@ -927,9 +927,8 @@ snps,perfect-filter-entries = <128>; rx-fifo-depth = <8192>; tx-fifo-depth = <8192>; - snps,fixed-burst; - snps,no-pbl-x8; - snps,force_thresh_dma_mode; + snps,mixed-burst; + snps,force_sf_dma_mode; snps,axi-config = <&stmmac_axi_setup>; snps,mtl-rx-config = <&mtl_rx_setup0>; snps,mtl-tx-config = <&mtl_tx_setup0>; @@ -1028,9 +1027,8 @@ snps,perfect-filter-entries = <128>; rx-fifo-depth = <8192>; tx-fifo-depth = <8192>; - snps,fixed-burst; - snps,no-pbl-x8; - snps,force_thresh_dma_mode; + snps,mixed-burst; + snps,force_sf_dma_mode; snps,axi-config = <&stmmac_axi_setup>; snps,mtl-rx-config = <&mtl_rx_setup1>; snps,mtl-tx-config = <&mtl_tx_setup1>; -- 2.47.3