i.MX ProcessorsのトピックRe: Kernel hangs while PCIe DBI access

Kernel hangs while PCIe DBI access

mallannanarsana — Thu, 16 Mar 2017 01:48:08 GMT

On our custom i.MX6Q based board, Kernel hangs while accessing the PCIe DBI registers (i,e readl(dbi_base)). please let us know possible reason for kernel hang.

Btw,
1. In u-boot , no problem while accessing DBI registers and also PCIe link comes up without any problem.

2. We are using official freescale kernel (4.1.15 ->imx_4.1.15_1.0.0_ga).

Thanks in advance

Mallanna

Re: Kernel hangs while PCIe DBI access

mallannanarsana — Thu, 16 Mar 2017 02:57:05 GMT

From i.MX6sx PCIe failes LTSSM training "If PCIe is enabled in uboot, try to disable PCIe support in uboot.".

disabled PCIe support in u-boot and and link came up in kernel.

Re: Kernel hangs while PCIe DBI access

igorpadykov — Thu, 16 Mar 2017 05:47:23 GMT

Hi Mallanna

thank for sharing this, also there is useful pcie usage explanation in uboot/../mx6sabresd.h

uboot-imx.git - Freescale i.MX u-boot Tree

Best regards
igor
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