Re: [PATCH 42/62] drm/i915/bdw: Implement WaSwitchSolVfFArbitrationPriority

Ben Widawsky
2013-11-03T17:44:59Z

On Sun, Nov 03, 2013 at 01:07:58PM +0200, Ville Syrjälä wrote:
> On Sat, Nov 02, 2013 at 09:07:40PM -0700, Ben Widawsky wrote:
> > GEN8 also needs this workaround.
>
> Not according to the w/a database.
>
> But the register description is the same for both HSW and BDW. Also for
> HSW, the w/a doesn't actually say whether we should set or clear the bit.
> the default is listed to be 0, so I guess we should set it, but then
> it's unclear why BDW wouldn't need the w/a. Once again a very poorly
> docuemnted w/a :(

Just an FYI: all workarounds for Broadwell came from the bspec, as the
workaround database did not exist for Broadwell at that time.

Also, I was informally told not to trust the workaround database yet.

[snip]

--
Ben Widawsky, Intel Open Source Technology Center
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