[Mesa-dev] [PATCH] intel/blorp/hiz: Emit CC viewport

[Nanley Chery]

On Tue, Apr 03, 2018 at 09:07:52PM +0300, Pohjolainen, Topi wrote:
> On Tue, Apr 03, 2018 at 09:04:48PM +0300, Pohjolainen, Topi wrote:
> > On Tue, Apr 03, 2018 at 07:40:34PM +0300, Topi Pohjolainen wrote:
> > > Otherwise simulator for ICL complains that:
> > > 
> > > B-spec CC_ViewPort Minimum Depth cannot be greater than Maximum Depth
> > 
> > And it looks that there is real reason why even HIZ ops should
> > specify it. In Bspec:
> > 
> > GT - 3D - vol2a.11 3D Pipeline - Windower - Depth Clear Value Format:
> > 
> > The clear value must be between the min and max depth values
> > (inclusive) defined in the CC_VIEWPORT.
> 
> And the same text is actually found in 3DSTATE_WM_HZ_OP_BODY -
> Depth Clear Value.
> 

Good find. Since this step isn't explicitly listed in the HZ OP
sequence, I think it would be helpful if we repeated what did for the
multisample packet and included a comment explaining why were updating
the viewport.

With or without the comment, this patch is
Reviewed-by: Nanley Chery <nanley.g.chery at intel.com>

> > 
> > > 
> > > CC: Jason Ekstrand <jason at jlekstrand.net>
> > > CC: Kenneth Graunke <kenneth at whitecape.org>
> > > Signed-off-by: Topi Pohjolainen <topi.pohjolainen at intel.com>
> > > ---
> > >  src/intel/blorp/blorp_genX_exec.h | 1 +
> > >  1 file changed, 1 insertion(+)
> > > 
> > > diff --git a/src/intel/blorp/blorp_genX_exec.h b/src/intel/blorp/blorp_genX_exec.h
> > > index 992bc99..e16d10c 100644
> > > --- a/src/intel/blorp/blorp_genX_exec.h
> > > +++ b/src/intel/blorp/blorp_genX_exec.h
> > > @@ -1570,6 +1570,7 @@ blorp_emit_gen8_hiz_op(struct blorp_batch *batch,
> > >      * emit 3DSTATE_MULTISAMPLE.
> > >      */
> > >     blorp_emit_3dstate_multisample(batch, params);
> > > +   blorp_emit_cc_viewport(batch);
> > >  
> > >     /* If we can't alter the depth stencil config and multiple layers are
> > >      * involved, the HiZ op will fail. This is because the op requires that a
> > > -- 
> > > 2.7.4
> > > 
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