[Intel-gfx] [PATCH 2/2] drm/i915/tgl: Add Clear Color support for TGL Render Decompression

[Chris Wilson]

Quoting Imre Deak (2020-12-01 20:50:21)
> On Tue, Dec 01, 2020 at 12:34:35PM +0000, Chris Wilson wrote:
> > There's also the matter of coherency. Is the object coherent for reads
> > from the CPU? -- in most cases it will not be, but you should check
> > obj->cache_coherency to see if the read requires a preceding
> > cache_clflush_range() / drm_clflush_virt_range().
> 
> Ok, at this point for the TGL-only modifier, we could then just
> warn_on(!bo_cache_coherent_for_read) due to HAS_LLC.

Stupid question, is the same path required for dg1?

That makes everything more difficult as the struct pages are gone.
-Chris