nvfx: support clip planes sensibly and fix them on nv30

Before, we were discarding the compiled vertex program on each
vertex program change.

Now we compile the program as if there were 6 clip planes and
dynamically patch in an "end program" bit at the right place.

Also, nv30 should now work.

1 files changed, 82 insertions, 0 deletions

diff --git a/src/gallium/drivers/nvfx/nvfx_state_emit.c b/src/gallium/drivers/nvfx/nvfx_state_emit.c
index bd89a385d7..c43a75aaa2 100644
--- a/src/gallium/drivers/nvfx/nvfx_state_emit.c
+++ b/src/gallium/drivers/nvfx/nvfx_state_emit.c
@@ -90,6 +90,74 @@ nvfx_state_validate_common(struct nvfx_context *nvfx)
 	if(dirty & NVFX_NEW_STIPPLE)
 		nvfx_state_stipple_validate(nvfx);
 
+       if(nvfx->dirty & NVFX_NEW_UCP)
+	{
+		unsigned enables[7] =
+		{
+				0,
+				NV34TCL_VP_CLIP_PLANES_ENABLE_PLANE0,
+				NV34TCL_VP_CLIP_PLANES_ENABLE_PLANE0 | NV34TCL_VP_CLIP_PLANES_ENABLE_PLANE1,
+				NV34TCL_VP_CLIP_PLANES_ENABLE_PLANE0 | NV34TCL_VP_CLIP_PLANES_ENABLE_PLANE1 | NV34TCL_VP_CLIP_PLANES_ENABLE_PLANE2,
+				NV34TCL_VP_CLIP_PLANES_ENABLE_PLANE0 | NV34TCL_VP_CLIP_PLANES_ENABLE_PLANE1 | NV34TCL_VP_CLIP_PLANES_ENABLE_PLANE2 | NV34TCL_VP_CLIP_PLANES_ENABLE_PLANE3,
+				NV34TCL_VP_CLIP_PLANES_ENABLE_PLANE0 | NV34TCL_VP_CLIP_PLANES_ENABLE_PLANE1 | NV34TCL_VP_CLIP_PLANES_ENABLE_PLANE2 | NV34TCL_VP_CLIP_PLANES_ENABLE_PLANE3 | NV34TCL_VP_CLIP_PLANES_ENABLE_PLANE4,
+				NV34TCL_VP_CLIP_PLANES_ENABLE_PLANE0 | NV34TCL_VP_CLIP_PLANES_ENABLE_PLANE1 | NV34TCL_VP_CLIP_PLANES_ENABLE_PLANE2 | NV34TCL_VP_CLIP_PLANES_ENABLE_PLANE3 | NV34TCL_VP_CLIP_PLANES_ENABLE_PLANE4 | NV34TCL_VP_CLIP_PLANES_ENABLE_PLANE5,
+		};
+
+		if(!nvfx->use_vp_clipping)
+		{
+			WAIT_RING(chan, 2);
+			OUT_RING(chan, RING_3D(NV34TCL_VP_CLIP_PLANES_ENABLE, 1));
+			OUT_RING(chan, 0);
+
+			WAIT_RING(chan, 6 * 4 + 1);
+			OUT_RING(chan, RING_3D(NV34TCL_VP_CLIP_PLANE_A(0), nvfx->clip.nr * 4));
+			OUT_RINGp(chan, &nvfx->clip.ucp[0][0], nvfx->clip.nr * 4);
+		}
+
+		WAIT_RING(chan, 2);
+		OUT_RING(chan, RING_3D(NV34TCL_VP_CLIP_PLANES_ENABLE, 1));
+		OUT_RING(chan, enables[nvfx->clip.nr]);
+	}
+
+	if(nvfx->use_vp_clipping && (nvfx->dirty & (NVFX_NEW_UCP | NVFX_NEW_VERTPROG)))
+	{
+		unsigned i;
+		struct nvfx_vertex_program* vp = nvfx->vertprog;
+		if(nvfx->clip.nr != vp->clip_nr)
+		{
+			unsigned idx;
+			WAIT_RING(chan, 14);
+
+			/* remove last instruction bit */
+			if(vp->clip_nr >= 0)
+			{
+				idx = vp->nr_insns - 7 + vp->clip_nr;
+				OUT_RING(chan, RING_3D(NV34TCL_VP_UPLOAD_FROM_ID, 1));
+				OUT_RING(chan,  vp->exec->start + idx);
+				OUT_RING(chan, RING_3D(NV34TCL_VP_UPLOAD_INST(0), 4));
+				OUT_RINGp (chan, vp->insns[idx].data, 4);
+			}
+
+			 /* set last instruction bit */
+			idx = vp->nr_insns - 7 + nvfx->clip.nr;
+			OUT_RING(chan, RING_3D(NV34TCL_VP_UPLOAD_FROM_ID, 1));
+			OUT_RING(chan,  vp->exec->start + idx);
+			OUT_RING(chan, RING_3D(NV34TCL_VP_UPLOAD_INST(0), 4));
+			OUT_RINGp(chan, vp->insns[idx].data, 3);
+			OUT_RING(chan, vp->insns[idx].data[3] | 1);
+			vp->clip_nr = nvfx->clip.nr;
+		}
+
+		// TODO: only do this for the ones changed
+		WAIT_RING(chan, 6 * 6);
+		for(i = 0; i < nvfx->clip.nr; ++i)
+		{
+			OUT_RING(chan, RING_3D(NV34TCL_VP_UPLOAD_CONST_ID, 5));
+			OUT_RING(chan, vp->data->start + i);
+			OUT_RINGp (chan, nvfx->clip.ucp[i], 4);
+		}
+	}
+
 	if(dirty & (NVFX_NEW_FRAGPROG | NVFX_NEW_FRAGCONST | NVFX_NEW_VERTPROG | NVFX_NEW_SPRITE))
 	{
 		nvfx_fragprog_validate(nvfx);
@@ -97,6 +165,20 @@ nvfx_state_validate_common(struct nvfx_context *nvfx)
 			flush_tex_cache = TRUE; // TODO: do we need this?
 	}
 
+	if(nvfx->is_nv4x)
+	{
+		unsigned vp_output = nvfx->vertprog->or | nvfx->hw_fragprog->or;
+		vp_output |= (1 << (nvfx->clip.nr + 6)) - (1 << 6);
+
+		if(vp_output != nvfx->hw_vp_output)
+		{
+			WAIT_RING(chan, 2);
+			OUT_RING(chan, RING_3D(NV40TCL_VP_RESULT_EN, 1));
+			OUT_RING(chan, vp_output);
+			nvfx->hw_vp_output = vp_output;
+		}
+	}
+
 	if(all_swizzled >= 0)
 		nvfx_framebuffer_validate(nvfx, all_swizzled);