Hi Ivan: > -----Original Message----- > From: Ivan Grimaldi [mailto:grimaldi.ivan@xxxxxxxxx] > Sent: Friday, July 15, 2016 9:55 PM > To: Richard Zhu <hongxing.zhu@xxxxxxx> > Cc: r65037@xxxxxxxxxxxxx; l.stach@xxxxxxxxxxxxxx; linux-pci@xxxxxxxxxxxxxxx; > bhelgaas@xxxxxxxxxx; linux-arm-kernel@xxxxxxxxxxxxxxxxxxx > Subject: Re: PROBLEM: pcie imx6 link problem after a random number of > reboot > > Hi , > > i have aligned pci-imx.c file with SHA > "b2d7a9cd3ff8ec561348267c2ef7d47b2b91e801" (same of kernel 4.6) and after > a random number of restart the kernel hangs (below the kernel log). From log, > as you see, the U-Boot haven't problem with PCI. [Zhu hongxing] The link training of kernel pcie would be impacted by the the link up state of the uboot pcie. > > ... > U-Boot 2015.01-ge2977fb-dirty (Jul 15 2016 - 11:28:42) > > CPU: Freescale i.MX6DL rev1.1 at 792 MHz > Reset cause: WDOG > Watchdog enabled > DRAM: 1 GiB > Flash: 96 MiB > MMC: FSL_SDHC: 0 > WARNING: Make sure the PCIe #PERST line is connected! > 00:01.0 - 16c3:abcd - Bridge device > 01:00.0 - 14e4:b242 - Network controller > In: serial > Out: serial > Err: serial > Net: FEC [PRIME] > Hit any key to stop autoboot: 0 > Booting from NFS... > Using FEC device > TFTP from server 192.168.74.130; our IP address is 192.168.74.235 Filename > 'ags20.dtb'. > Load address: 0x12000000 > Loading: ### > 3.2 MiB/s > done > Bytes transferred = 29921 (74e1 hex) > Using FEC device > TFTP from server 192.168.74.130; our IP address is 192.168.74.235 Filename > 'zImage'. > Load address: 0x12100000 > Loading: > ################################################################ > # > > ################################################################ > # > > ################################################################ > # > ########################################## > 3.9 MiB/s > done > Bytes transferred = 3472120 (34faf8 hex) Kernel image @ 0x12100000 > [ 0x000000 - 0x34faf8 ] ## Flattened Device Tree blob at 12000000 > Booting using the fdt blob at 0x12000000 > Loading Device Tree to 4f530000, end 4f53a4e0 ... OK > > Starting kernel ... > [Zhu hongxing] It seems that the kernel is hang. Most possible reason is that pcie register is accessed, but the clks is not configured properly. Can you enable the " CONFIG_EARLY_PRINTK", and debug into it? > > > Best regards > IVan > Snip... Best Regards hongxing zhu Linux BSP team Office: 86-21-28937189 Email: hongxing.zhu@xxxxxxx ��.n��������+%������w��{.n�����{���"�)�� jg��� �����ݢj����G���� ���j:+v���w�m������w�������h�����٥
