| Message ID | 20250312163426.2178314-1-wens@kernel.org (mailing list archive) |
|---|---|
| State | New |
| Delegated to: | Netdev Maintainers |
| Headers | show |
| Series | [RESEND,net-next,v2] net: stmmac: dwmac-rk: Provide FIFO sizes for DWMAC 1000 | expand |
On 3/12/2025 9:34 AM, Chen-Yu Tsai wrote: > From: Chen-Yu Tsai <wens@csie.org> > > The DWMAC 1000 DMA capabilities register does not provide actual > FIFO sizes, nor does the driver really care. If they are not > provided via some other means, the driver will work fine, only > disallowing changing the MTU setting. > > Provide the FIFO sizes through the driver's platform data to enable > MTU changes. The FIFO sizes are confirmed to be the same across RK3288, > RK3328, RK3399 and PX30, based on their respective manuals. It is > likely that Rockchip synthesized their DWMAC 1000 with the same > parameters on all their chips that have it. > > Signed-off-by: Chen-Yu Tsai <wens@csie.org> > --- Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c index 003fa5cf42c3..e57181ce5f84 100644 --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c @@ -1969,8 +1969,11 @@ static int rk_gmac_probe(struct platform_device *pdev) /* If the stmmac is not already selected as gmac4, * then make sure we fallback to gmac. */ - if (!plat_dat->has_gmac4) + if (!plat_dat->has_gmac4) { plat_dat->has_gmac = true; + plat_dat->rx_fifo_size = 4096; + plat_dat->tx_fifo_size = 2048; + } plat_dat->set_clk_tx_rate = rk_set_clk_tx_rate;