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10.0; Win64; x64; rv:91.0) Gecko/20100101 Thunderbird/91.7.0 Subject: Re: riscv defconfig CONFIG_PM/macb/generic PHY regression in v5.18-rc1 Content-Language: en-US To: Palmer Dabbelt , linux@armlinux.org.uk Cc: Conor.Dooley@microchip.com, apatel@ventanamicro.com, netdev@vger.kernel.org, Nicolas.Ferre@microchip.com, Claudiu.Beznea@microchip.com, andrew@lunn.ch, hkallweit1@gmail.com, linux-riscv@lists.infradead.org References: From: Conor Dooley In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220405_102354_167910_F3B62D9B X-CRM114-Status: GOOD ( 20.80 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org 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18:23:49 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101 Thunderbird/91.7.0 Subject: Re: riscv defconfig CONFIG_PM/macb/generic PHY regression in v5.18-rc1 Content-Language: en-US To: Palmer Dabbelt , linux@armlinux.org.uk Cc: Conor.Dooley@microchip.com, apatel@ventanamicro.com, netdev@vger.kernel.org, Nicolas.Ferre@microchip.com, Claudiu.Beznea@microchip.com, andrew@lunn.ch, hkallweit1@gmail.com, linux-riscv@lists.infradead.org References: From: Conor Dooley In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On 05/04/2022 17:56, Palmer Dabbelt wrote: > On Tue, 05 Apr 2022 08:53:06 PDT (-0700), linux@armlinux.org.uk wrote: >> On Tue, Apr 05, 2022 at 01:05:12PM +0000, Conor.Dooley@microchip.com >> wrote: >>> Hey, >>> I seem to have come across a regression in the default riscv defconfig >>> between riscv-for-linus-5.18-mw0 (bbde015227e8) & v5.18-rc1, exposed by >>> c5179ef1ca0c ("RISC-V: Enable RISC-V SBI CPU Idle driver for QEMU virt >>> machine") which causes the ethernet phy to not come up on my Icicle kit: >>> [ 3.179864] macb 20112000.ethernet eth0: validation of sgmii with >>> support 0000000,00000000,00006280 and advertisement >>> 0000000,00000000,00004280 failed: -EINVAL >>> [ 3.194490] macb 20112000.ethernet eth0: Could not attach PHY (-22) >> >> I don't think that would be related to the idle driver. This looks like >> the PHY hasn't filled in the supported mask at probe time - do you have >> the driver for the PHY built-in or the PHY driver module loaded? > > IIRC we had a bunch of issues with the PHY on the HiFive Unleashed, > there was a quirky reset sequence that it wouldn't even probe correctly > without.  We have a >    ð0 { >            status = "okay"; >            phy-mode = "gmii"; >            phy-handle = <&phy0>; >            phy0: ethernet-phy@0 { >                    compatible = "ethernet-phy-id0007.0771"; >                    reg = <0>; >            }; >    }; > > in the Unleashed DT, but I can't find anything similar in the Icicle DT > >    &mac1 { >            status = "okay"; >            phy-mode = "sgmii"; >            phy-handle = <&phy1>; >            phy1: ethernet-phy@9 { >                    reg = <9>; >                    ti,fifo-depth = <0x1>; >            }; >            phy0: ethernet-phy@8 { >                    reg = <8>; >                    ti,fifo-depth = <0x1>; >            }; >    }; > > I seem to remember picking that specific phy because it was similar to > the one that was POR for the Icicle at the time we decided, maybe you > have a similar phy with a similar quirk and need a similar workaround? I tried using the one for the VSC8662 (0007.0660) since that's whats on, the board but that didn't help. Without the revert: [ 1.521768] macb 20112000.ethernet eth0: Cadence GEM rev 0x0107010c at 0x20112000 irq 17 (00:04:a3:4d:4c:dc) [ 3.206274] macb 20112000.ethernet eth0: PHY [20112000.ethernet-ffffffff:09] driver [Vitesse VSC8662] (irq=POLL) [ 3.216641] macb 20112000.ethernet eth0: configuring for phy/sgmii link mode (and then nothing) If I revert the CONFIG_PM addition: [ 1.508882] macb 20112000.ethernet eth0: Cadence GEM rev 0x0107010c at 0x20112000 irq 17 (00:04:a3:4d:4c:dc) [ 2.879617] macb 20112000.ethernet eth0: PHY [20112000.ethernet-ffffffff:09] driver [Vitesse VSC8662] (irq=POLL) [ 2.890010] macb 20112000.ethernet eth0: configuring for phy/sgmii link mode [ 6.981823] macb 20112000.ethernet eth0: Link is Up - 1Gbps/Full - flow control off [ 6.989657] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready I will try again tomorrow with "ethernet-phy-id0007.0771" to see if anything changes, since that would use the Microsemi driver rather than the Vitesse driver that VSC8662/0007.0660 uses. Thanks, Conor.