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Adjusted txpbl for rk3399 to fix network issues with MTU 1500 (#1736)
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19
patch/kernel/rockchip64-current/rk3399-adjust-txpbl-for-mtu-1500.patch
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,19 @@ | ||
| Default Programmable Buffer Length for TX in rk3399's gmac is not suitable | ||
| for MTUs higher than 1498. The easiest solution would be to disable | ||
| TX offloading but it is not ideal as it disables hardware checksumming. | ||
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| This patch sets txpbl to 0x4 which is good for the most popular MTU | ||
| value of 1500. | ||
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| diff --git a/arch/arm64/boot/dts/rockchip/rk3399.dtsi b/arch/arm64/boot/dts/rockchip/rk3399.dtsi | ||
| index cede1ad81..02674bbf0 100644 | ||
| --- a/arch/arm64/boot/dts/rockchip/rk3399.dtsi | ||
| +++ b/arch/arm64/boot/dts/rockchip/rk3399.dtsi | ||
| @@ -288,6 +288,7 @@ | ||
| resets = <&cru SRST_A_GMAC>; | ||
| reset-names = "stmmaceth"; | ||
| rockchip,grf = <&grf>; | ||
| + snps,txpbl = <0x4>; | ||
| status = "disabled"; | ||
| }; | ||
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19 changes: 19 additions & 0 deletions
19
patch/kernel/rockchip64-dev/rk3399-adjust-txpbl-for-mtu-1500.patch
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,19 @@ | ||
| Default Programmable Buffer Length for TX in rk3399's gmac is not suitable | ||
| for MTUs higher than 1498. The easiest solution would be to disable | ||
| TX offloading but it is not ideal as it disables hardware checksumming. | ||
|
|
||
| This patch sets txpbl to 0x4 which is good for the most popular MTU | ||
| value of 1500. | ||
|
|
||
| diff --git a/arch/arm64/boot/dts/rockchip/rk3399.dtsi b/arch/arm64/boot/dts/rockchip/rk3399.dtsi | ||
| index cede1ad81..02674bbf0 100644 | ||
| --- a/arch/arm64/boot/dts/rockchip/rk3399.dtsi | ||
| +++ b/arch/arm64/boot/dts/rockchip/rk3399.dtsi | ||
| @@ -288,6 +288,7 @@ | ||
| resets = <&cru SRST_A_GMAC>; | ||
| reset-names = "stmmaceth"; | ||
| rockchip,grf = <&grf>; | ||
| + snps,txpbl = <0x4>; | ||
| status = "disabled"; | ||
| }; | ||
|
|