[PATCH] arm64: tegra: Override ethernet FIFO sizes on Tegra194

[Mikko Perttunen]

The eqos ethernet device on Tegra194 has 36KiB of each of RX and TX FIFO
memory. The hardware registers that report the sizes to the driver only
work in powers of two, and are rounding up to 64KiB, causing
intermittent network hangs.

Fix this by overriding the FIFO sizes to 36KiB here in the device tree.

Fixes: f89b58ce71a9 ("arm64: tegra: Add ethernet controller on Tegra194")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Mikko Perttunen <mperttunen@xxxxxxxxxx>
---
 arch/arm64/boot/dts/nvidia/tegra194.dtsi | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/arm64/boot/dts/nvidia/tegra194.dtsi b/arch/arm64/boot/dts/nvidia/tegra194.dtsi
index 43d82841b3cd..fe2a3b81c829 100644
--- a/arch/arm64/boot/dts/nvidia/tegra194.dtsi
+++ b/arch/arm64/boot/dts/nvidia/tegra194.dtsi
@@ -156,6 +156,9 @@ ethernet@2490000 {
 			iommus = <&smmu TEGRA194_SID_EQOS>;
 			status = "disabled";
 
+			rx-fifo-depth = <36864>;
+			tx-fifo-depth = <36864>;
+
 			snps,write-requests = <1>;
 			snps,read-requests = <3>;
 			snps,burst-map = <0x7>;

---
base-commit: bf1ee2bd5c2da8992f33c8950ef194aaff74ed6c
change-id: 20261010-b4-t194-stmmac-debug-202610-53da647cd36c