[Bug 106250] Regression with Dell TB16 dock and Linux kernel 4.16.x

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=106250

--- Comment #9 from Mahesh Kumar <mahesh1.kumar at intel.com> ---
If there are any logs available, I can provide more accurate debug. My analysis
is:
In Gen-9 we have enabled few Display WA's which are increasing WM requirement
almost by double for Y-tiling. Which may be resulting in WM requirement being 
more than available DDB.

Assigning (res_blocks = ddb_allocation - 1) is not right solution, as with that
we'll violate HW watermark requirement (it may work for some scenario but not
really a right solution).
If failing during sanitize_watermarks will make userspace to fallback to
X-tiling then that's right solution.

-Mahesh

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