From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.kernel.org ([198.145.29.136]:54108 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753982AbcCBT4i (ORCPT ); Wed, 2 Mar 2016 14:56:38 -0500 Date: Wed, 2 Mar 2016 13:56:34 -0600 From: Bjorn Helgaas To: Roberto Fichera Cc: linux-pci@vger.kernel.org, Richard Zhu , Lucas Stach Subject: Re: iMX6q PCIe phy link never came up on kernel v4.4.x Message-ID: <20160302195634.GA19223@localhost> References: <56D5E3DF.9030906@tekno-soft.it> <56D71F27.7070708@tekno-soft.it> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <56D71F27.7070708@tekno-soft.it> Sender: linux-pci-owner@vger.kernel.org List-ID: [+cc Richard, Lucas] On Wed, Mar 02, 2016 at 06:13:11PM +0100, Roberto Fichera wrote: > On 03/01/2016 07:47 PM, Roberto Fichera wrote: > > Sorry guy if I push a little bit about this, I've added some debugging code regarding my issue: > > [ 0.557268] imx6q-pcie 1ffc000.pcie: phy link never came up > [ 0.557290] imx6q-pcie 1ffc000.pcie: LTSSM current state: 0x3 (S_POLL_COMPLIANCE) > [ 0.557304] imx6q-pcie 1ffc000.pcie: PIPE transmit K indication: 1 > [ 0.557318] imx6q-pcie 1ffc000.pcie: PIPE Transmit data: 0x4abc > [ 0.557332] imx6q-pcie 1ffc000.pcie: Receiver is receiving logical idle: no > [ 0.557345] imx6q-pcie 1ffc000.pcie: Second symbol is also idle (16-bit PHY interface only): no > [ 0.557360] imx6q-pcie 1ffc000.pcie: Currently receiving k237 (PAD) in place of link number: no > [ 0.557372] imx6q-pcie 1ffc000.pcie: Currently receiving k237 (PAD) in place of lane number: no > [ 0.557385] imx6q-pcie 1ffc000.pcie: Link control bits advertised by link partner: 0xa > [ 0.557398] imx6q-pcie 1ffc000.pcie: Receiver detected lane reversal: no > [ 0.557410] imx6q-pcie 1ffc000.pcie: TS2 training sequence received: no > [ 0.557422] imx6q-pcie 1ffc000.pcie: TS1 training sequence received: no > [ 0.557434] imx6q-pcie 1ffc000.pcie: Receiver reports skip reception: no > [ 0.557446] imx6q-pcie 1ffc000.pcie: LTSSM reports PHY link up: no > [ 0.557460] imx6q-pcie 1ffc000.pcie: A skip ordered set has been transmitted: no > [ 0.557474] imx6q-pcie 1ffc000.pcie: Link number advertised/confirmed by link partner: 68 > [ 0.557487] imx6q-pcie 1ffc000.pcie: Application request to initiate training reset: no > [ 0.557500] imx6q-pcie 1ffc000.pcie: PIPE transmit compliance request: no > [ 0.557512] imx6q-pcie 1ffc000.pcie: PIPE transmit electrical idle request: no > [ 0.557524] imx6q-pcie 1ffc000.pcie: PIPE receiver detect/loopback request: no > [ 0.557536] imx6q-pcie 1ffc000.pcie: LTSSM-negotiated link reset: yes > [ 0.557547] imx6q-pcie 1ffc000.pcie: LTSSM testing for polarity reversal: no > [ 0.557559] imx6q-pcie 1ffc000.pcie: LTSSM performing link training: no > [ 0.557572] imx6q-pcie 1ffc000.pcie: LTSSM in DISABLE state; link inoperable: no > [ 0.557583] imx6q-pcie 1ffc000.pcie: Scrambling disabled for the link: no > [ 0.558156] imx6q-pcie 1ffc000.pcie: PCI host bridge to bus 0000:00 > [ 0.558179] pci_bus 0000:00: root bus resource [bus 00-ff] > [ 0.558197] pci_bus 0000:00: root bus resource [??? 0x01f00000-0x01f7ffff flags 0x0] > [ 0.558212] pci_bus 0000:00: root bus resource [io 0x0000-0xffff] > [ 0.558226] pci_bus 0000:00: root bus resource [mem 0x01000000-0x01efffff] > [ 0.558346] pci 0000:00:00.0: [16c3:abcd] type 01 class 0x060400 > [ 0.558468] pci 0000:00:00.0: reg 0x10: [mem 0x00000000-0x000fffff] > [ 0.558510] pci 0000:00:00.0: reg 0x38: [mem 0x00000000-0x0000ffff pref] > [ 0.558708] pci 0000:00:00.0: supports D1 > [ 0.558727] pci 0000:00:00.0: PME# supported from D0 D1 D3hot D3cold > [ 0.559495] PCI: bus0: Fast back to back transfers disabled > [ 0.559834] PCI: bus1: Fast back to back transfers enabled > [ 0.559997] pci 0000:00:00.0: BAR 0: assigned [mem 0x01000000-0x010fffff] > [ 0.560025] pci 0000:00:00.0: BAR 6: assigned [mem 0x01100000-0x0110ffff pref] > [ 0.560047] pci 0000:00:00.0: PCI bridge to [bus 01] > [ 0.560812] pcieport 0000:00:00.0: Signaling PME through PCIe PME interrupt > [ 0.560837] pcie_pme 0000:00:00.0:pcie01: service driver pcie_pme loaded > > Any idea what's going on? > > Thanks in advance, > Roberto Fichera. > > > Hi There, > > > > Working on a custom iMX6q board I'm getting a PCIe phy link never came up, even if uboot seems detecting > > everything ok. My DTS is enabling PCIe with > > > > &pcie { > > pinctrl-names = "default"; > > pinctrl-0 = <&pinctrl_pcie_reset>; > > reset-gpio = <&gpio7 12 0>; > > status = "okay"; > > }; > > > > The PCIe is connected to a PCIe-to-PCI TI XIO2001. The XIO2001 power is controlled by GPIO_9 and > > the corresponding fixed regulator is set as > > > > reg_pcie: regulator@4 { > > compatible = "regulator-fixed"; > > reg = <4>; > > pinctrl-names = "default"; > > pinctrl-0 = <&pinctrl_pcie_reg>; > > regulator-name = "MPCIE_3V3"; > > regulator-min-microvolt = <3300000>; > > regulator-max-microvolt = <3300000>; > > gpio = <&gpio1 9 0>; > > regulator-always-on; > > enable-active-high; > > }; > > > > so I'd like to know if there is any other special setup to do in order to get it to work on a v4.4.x kernel. > > Or anyway how to debug it. > > > > Any suggestion? > > > > Thanks in advance, > > Roberto Fichera. > > > > U-Boot 2014.04-imx_v2014.04_3.14.38_6qp_beta+g6e9282c (Feb 15 2016 - 10:02:31) > > > > CPU: Freescale i.MX6Q rev1.5 at 792 MHz > > CPU: Temperature 35 C, calibration data: 0x5664d569 > > Reset cause: POR > > Board: Janas iMX6Q (ID:e315c064140749d4) > > I2C: ready > > DRAM: 2 GiB > > MMC: FSL_SDHC: 0, FSL_SDHC: 1 > > *** Warning - bad CRC, using default environment > > > > 00:01.0 - 16c3:abcd - Bridge device > > 01:00.0 - 104c:8240 - Bridge device > > 02:04.0 - 1397:08b4 - Network controller > > In: serial > > Out: serial > > Err: serial > > Found PFUZE100! deviceid=10,revid=21 > > mmc1(part 0) is current device > > Net: FEC [PRIME] > > Warning: failed to set MAC address > > > > Normal Boot > > .... > > .... > > [ 0.236141] PCI host bridge /soc/pcie@0x01000000 ranges: > > [ 0.236162] No bus range found for /soc/pcie@0x01000000, using [bus 00-ff] > > [ 0.236213] err 0x01f00000..0x01f7ffff -> 0x01f00000 > > [ 0.236250] IO 0x01f80000..0x01f8ffff -> 0x00000000 > > [ 0.236330] MEM 0x01000000..0x01efffff -> 0x01000000 > > -->>> [ 0.546690] imx6q-pcie 1ffc000.pcie: phy link never came up > > [ 0.547263] imx6q-pcie 1ffc000.pcie: PCI host bridge to bus 0000:00 > > [ 0.547287] pci_bus 0000:00: root bus resource [bus 00-ff] > > [ 0.547304] pci_bus 0000:00: root bus resource [??? 0x01f00000-0x01f7ffff flags 0x0] > > [ 0.547321] pci_bus 0000:00: root bus resource [io 0x0000-0xffff] > > [ 0.547335] pci_bus 0000:00: root bus resource [mem 0x01000000-0x01efffff] > > [ 0.548608] PCI: bus0: Fast back to back transfers disabled > > [ 0.548950] PCI: bus1: Fast back to back transfers enabled > > [ 0.549107] pci 0000:00:00.0: BAR 0: assigned [mem 0x01000000-0x010fffff] > > [ 0.549137] pci 0000:00:00.0: BAR 6: assigned [mem 0x01100000-0x0110ffff pref] > > [ 0.549159] pci 0000:00:00.0: PCI bridge to [bus 01] > > [ 0.549945] pcieport 0000:00:00.0: Signaling PME through PCIe PME interrupt > > ... > > > > -- > > To unsubscribe from this list: send the line "unsubscribe linux-pci" in > > the body of a message to majordomo@vger.kernel.org > > More majordomo info at http://vger.kernel.org/majordomo-info.html > > > > -- > To unsubscribe from this list: send the line "unsubscribe linux-pci" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html