On Monday, August 27, 2018 6:18:21 PM PDT Marek Olšák wrote: > On Mon, Aug 27, 2018 at 5:55 PM, Kenneth Graunke <kenn...@whitecape.org> > wrote: > > On Monday, August 27, 2018 11:05:19 AM PDT Marek Olšák wrote: > >> Yeah, this will be more complicated because it's per RT. > >> > >> I suggest adding a PIPE_CAP for the hw capability to force DST_ALPHA > >> to 0, and applying this workaround only if the PIPE_CAP is 0. > >> > >> Marek > > > > I was thinking of applying this hack based on PIPE_CAP_INDEP_BLEND_FUNC. > > > > Ilia seemed to think that it was unsupportable on older Nouveau (without > > independent alpha blending), but harmless either way on modern Nouveau. > > (Supposedly Freedreno does this workaround in the driver...) > > > > Would you prefer not to have this triggered? > > Yes. I think it would be unnecessary overhead for us. > > Marek
Okay, cool, thanks for the feedback. Let's shelve this for now. I'm thinking of reworking how I handle RGBX -> RGBA stuff anyway, and may need to handle it in the driver in the end. I'll see how things look and either handle it myself or come up with a version of this patch which makes the hack optional.
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