linux-kernel - Re: [PATCH net v5 2/3] net: stmmac: check if MAC needs to attach to a PHY

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Date:   Wed, 5 Apr 2023 08:48:19 +0000
From:   Shahab Vahedi <Shahab.Vahedi@...opsys.com>
To:     Michael Sit Wei Hong <michael.wei.hong.sit@...el.com>
CC:     Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        Vineet Gupta <vgupta@...nel.org>,
        "linux-snps-arc@...ts.infradead.org" 
        <linux-snps-arc@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "alexandre.torgue@...s.st.com andrew@...n.ch boon.leong.ong@...el.com davem@...emloft.net edumazet@...gle.com hkallweit1@...il.com hong.aun.looi@...el.com joabreu@...opsys.com kuba@...nel.org linux-arm-kernel@...ts.infradead.org linux-stm32@...md-mailman.stormreply.com linux@...linux.org.uk mcoquelin.stm32@...il.com netdev@...r.kernel.org pabeni@...hat.com peppe.cavallaro@...com peter.jun.ann.lai@...el.com weifeng.voon"@intel.com,
        <"alexandre.torgue@...s.st.com andrew@...n.ch boon.leong.ong@...el.com davem@...emloft.net edumazet@...gle.com hkallweit1@...il.com hong.aun.looi@...el.com joabreu@...opsys.com kuba@...nel.org linux-arm-kernel@...ts.infradead.org linux-stm32@...md-mailman.stormreply.com linux@...linux.org.uk mcoquelin.stm32@...il.com netdev@...r.kernel.org pabeni@...hat.com peppe.cavallaro@...com peter.jun.ann.lai@...el.com weifeng.voon"@intel.com>
Subject: Re: [PATCH net v5 2/3] net: stmmac: check if MAC needs to attach to a
 PHY

Same happens on ARC HSDK [1]:

# dmesg | grep stmmaceth
  stmmaceth f0008000.ethernet: use coherent DMA ops
  stmmaceth f0008000.ethernet: IRQ eth_wake_irq not found
  stmmaceth f0008000.ethernet: IRQ eth_lpi not found
  stmmaceth f0008000.ethernet: PTP uses main clock
  stmmaceth f0008000.ethernet: User ID: 0x10, Synopsys ID: 0x37
  stmmaceth f0008000.ethernet:    DWMAC1000
  stmmaceth f0008000.ethernet: DMA HW capability register supported
  stmmaceth f0008000.ethernet: RX Checksum Offload Engine supported
  stmmaceth f0008000.ethernet: COE Type 2
  stmmaceth f0008000.ethernet: TX Checksum insertion supported
  stmmaceth f0008000.ethernet: Normal descriptors
  stmmaceth f0008000.ethernet: Ring mode enabled
  stmmaceth f0008000.ethernet: Enable RX Mitigation via HW Watchdog Timer
  stmmaceth f0008000.ethernet: device MAC address 7e:14:df:5f:b8:78
  stmmaceth f0008000.ethernet eth0: Register MEM_TYPE_PAGE_POOL RxQ-0
  stmmaceth f0008000.ethernet eth0: PHY [stmmac-0:00] driver [Micrel KSZ9031 Gigabit PHY] (irq=POLL)
  stmmaceth f0008000.ethernet eth0: no phy found
  stmmaceth f0008000.ethernet eth0: __stmmac_open: Cannot attach to PHY (error: -19)

After reverting this patch:

# dmesg | grep stmmaceth
  stmmaceth f0008000.ethernet: use coherent DMA ops
  stmmaceth f0008000.ethernet: IRQ eth_wake_irq not found
  stmmaceth f0008000.ethernet: IRQ eth_lpi not found
  stmmaceth f0008000.ethernet: PTP uses main clock
  stmmaceth f0008000.ethernet: User ID: 0x10, Synopsys ID: 0x37
  stmmaceth f0008000.ethernet:    DWMAC1000
  stmmaceth f0008000.ethernet: DMA HW capability register supported
  stmmaceth f0008000.ethernet: RX Checksum Offload Engine supported
  stmmaceth f0008000.ethernet: COE Type 2
  stmmaceth f0008000.ethernet: TX Checksum insertion supported
  stmmaceth f0008000.ethernet: Normal descriptors
  stmmaceth f0008000.ethernet: Ring mode enabled
  stmmaceth f0008000.ethernet: Enable RX Mitigation via HW Watchdog Timer
  stmmaceth f0008000.ethernet: device MAC address 26:05:ea:c0:66:16
  stmmaceth f0008000.ethernet eth0: Register MEM_TYPE_PAGE_POOL RxQ-0
  stmmaceth f0008000.ethernet eth0: PHY [stmmac-0:00] driver [Micrel KSZ9031
  Gigabit PHY] (irq=POLL)
  stmmaceth f0008000.ethernet eth0: No Safety Features support found
  stmmaceth f0008000.ethernet eth0: PTP not supported by HW
  stmmaceth f0008000.ethernet eth0: configuring for phy/rgmii-id link mode
  stmmaceth f0008000.ethernet eth0: Link is Up - 1Gbps/Full - flow control off

[1]
arch/arc/boot/dts/hsdk.dts

-- 
Shahab