[Bug 194761] amdgpu driver breaks on Oland (SI)

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=194761

Jean Delvare (jdelvare at suse.de) changed:

           What    |Removed                     |Added
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             Status|NEEDINFO                    |ASSIGNED

--- Comment #61 from Jean Delvare (jdelvare at suse.de) ---
For completeness, I tried with only the mc_arb_ramcfg fix on my R5 240
(reportedly 64-bit Oland) and it does not work. Actually that patch doesn't
seem to have any effect for me (but it is obviously correct so should be
applied anyway.)

What fixes it for me is using the P4_8x16 config. If the Windows driver really
uses the P2 config for that part, then something else must be wrong in the
Linux driver. But then again this contradicts Marek's findings in comment #23
that the hardware documentation claims some Oland variants use the P4_8x16
config. We still don't know for sure what Oland64 and Oland128 stand for, if
not the memory bus width.

I am available and willing to help with any test or question you may have.

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