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Received: from shell.armlinux.org.uk ([fd8f:7570:feb6:1:5054:ff:fe00:4ec]:51782) by pandora.armlinux.org.uk with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1tnE63-0003om-0c; Wed, 26 Feb 2025 09:52:55 +0000 Received: from linux by shell.armlinux.org.uk with local (Exim 4.96) (envelope-from ) id 1tnE5y-0006xe-26; Wed, 26 Feb 2025 09:52:50 +0000 Date: Wed, 26 Feb 2025 09:52:50 +0000 From: "Russell King (Oracle)" To: SkyLake Huang =?utf-8?B?KOm7g+WVn+a+pCk=?= Cc: "andrew@lunn.ch" , "dqfext@gmail.com" , Steven Liu =?utf-8?B?KOWKieS6uuixqik=?= , "davem@davemloft.net" , AngeloGioacchino Del Regno , "linux-mediatek@lists.infradead.org" , "pabeni@redhat.com" , "edumazet@google.com" , "linux-kernel@vger.kernel.org" , "hkallweit1@gmail.com" , "horms@kernel.org" , "daniel@makrotopia.org" , "kuba@kernel.org" , "linux-arm-kernel@lists.infradead.org" , "netdev@vger.kernel.org" , "matthias.bgg@gmail.com" Subject: Re: [PATCH net-next v2 3/3] net: phy: mediatek: add driver for built-in 2.5G ethernet PHY on MT7988 Message-ID: References: <20250219083910.2255981-1-SkyLake.Huang@mediatek.com> <20250219083910.2255981-4-SkyLake.Huang@mediatek.com> <5fae9c69a09320b0b24f25a178137bd0256a72d8.camel@mediatek.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <5fae9c69a09320b0b24f25a178137bd0256a72d8.camel@mediatek.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250226_015302_944655_2CBE43CA X-CRM114-Status: GOOD ( 19.37 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org On Wed, Feb 26, 2025 at 06:48:34AM +0000, SkyLake Huang (黃啟澤) wrote: > On Wed, 2025-02-19 at 09:33 +0000, Russell King (Oracle) wrote: > > > > External email : Please do not click links or open attachments until > > you have verified the sender or the content. > > > > > > On Wed, Feb 19, 2025 at 04:39:10PM +0800, Sky Huang wrote: > > > +static int mt798x_2p5ge_phy_config_init(struct phy_device *phydev) > > > +{ > > > +     struct pinctrl *pinctrl; > > > +     int ret; > > > + > > > +     /* Check if PHY interface type is compatible */ > > > +     if (phydev->interface != PHY_INTERFACE_MODE_INTERNAL) > > > +             return -ENODEV; > > > + > > > +     ret = mt798x_2p5ge_phy_load_fw(phydev); > > > +     if (ret < 0) > > > +             return ret; > > > > Firmware should not be loaded in the .config_init method. The above > > call will block while holding the RTNL which will prevent all other > > network configuration until the firmware has been loaded or the load > > fails. > > > > Thanks. > > > > -- > > RMK's Patch system: > > https://urldefense.com/v3/__https://www.armlinux.org.uk/developer/patches/__;!!CTRNKA9wMg0ARbw!iV-1ViPFsUV-lLj7aIycan8nery6sQO3t6mkpdlb_GW8hswhxc4ejJozxqkU3s2WzxSizs4kfdC77yr7HGGRIuU$ > > FTTP is here! 80Mbps down 10Mbps up. Decent connectivity at last! > Hi Russell, > mt798x_p5ge_phy_load_fw() will only load firmware once after driver is > probed through priv->fw_loaded. And actually, firmware loading > procedure only takes about 11ms. This was discussed earlier in: > https://patchwork.kernel.org/project/linux-mediatek/patch/20240520113456.21675-6-SkyLake.Huang@mediatek.com/#25856462 > https://patchwork.kernel.org/project/linux-mediatek/patch/20240520113456.21675-6-SkyLake.Huang@mediatek.com/#25857174 1. Wouldn't it be a good idea to include the loading time in the patch description or a comment in the patch? 2. What about the time it takes for request_firmware() uses the sysfs fallback, which essentially passes the firmware request to userspace to deal with? That can block for an indeterminate amount of time. -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTP is here! 80Mbps down 10Mbps up. Decent connectivity at last!