help: radeon card boot hung under Linux

[Alex Deucher]

On Wed, Mar 8, 2017 at 1:42 AM, Weiwen Zhong <azhongweiwen at gmail.com> wrote:
> Hi all,
>
> I have an armv8 machine with radeon 7350 card installed. And this is my only
> display card. I've built radeon drivers and firmwares into the kernel (ver
> 4.9.9).
> When system booting and loading radeon driver, my radeon card will hung
> there, about 3 seconds the screen will be black without signal. And I've
> found the code where it stuck. And what's wrong with that?
>
> function call:
> evergreen_startup->
>     evergreen_pcie_gart_enable->
>         radeon_gart_table_vram_pin->
>             radeon_gart_set_page (hung here)

That function just does a write to a buffer in vram.  vram is accessed
via a PCI BAR.  Make sure PCI resource access is reliable on your
platform.

Alex

>
> Thanks in advance.
>
> weiwen zhong
>
>
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