netdev - Re: stmmac / meson8b-dwmac

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Date:   Wed, 22 May 2019 16:02:22 +0200
From:   Neil Armstrong <narmstrong@...libre.com>
To:     Jose Abreu <Jose.Abreu@...opsys.com>,
        Simon Huelck <simonmail@....de>,
        Sebastian Gottschall <s.gottschall@...media-net.de>,
        Jerome Brunet <jbrunet@...libre.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Cc:     "linux-amlogic@...ts.infradead.org" 
        <linux-amlogic@...ts.infradead.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "alexandre.torgue@...com" <alexandre.torgue@...com>,
        Emiliano Ingrassia <ingrassia@...genesys.com>,
        "Gpeppe.cavallaro@...com" <Gpeppe.cavallaro@...com>
Subject: Re: stmmac / meson8b-dwmac

Hi Jose,

On 13/05/2019 11:07, Jose Abreu wrote:
> From: Simon Huelck <simonmail@....de>
> Date: Sat, May 11, 2019 at 15:53:34
> 
>> ethtool -S gave me some counts for mmc_rx_fifo_overflow, which i didnt
>> recognize before.
> 
> Flow Control can prevent this to happen. Please check if your DT FIFO 
> bindings are >= 4096.

Actually our DT node minimalist :
		ethmac: ethernet@...10000 {
			compatible = "amlogic,meson-gxbb-dwmac", "snps,dwmac-3.710", "snps,dwmac";
			reg = <0x0 0xc9410000 0x0 0x10000
			       0x0 0xc8834540 0x0 0x4>;
			interrupts = <GIC_SPI 8 IRQ_TYPE_LEVEL_HIGH>;
			interrupt-names = "macirq";
		};

(I removed pinctrl, clocks and reset)

The dwmac bindings are quite complex, and we aren't sure how to describe correctly the HW.

Could you point us on the right direction ?

Thanks,
Neil

> 
>> Do we have new ideas / new direction to dig for ?
> 
> GIT Bisect is the best direction to follow.
> 
> Thanks,
> Jose Miguel Abreu
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> linux-amlogic@...ts.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-amlogic
> 

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