radv: fix passing clip/cull distances from VS to PS

CTS doesn't test input clip/cull distances for the fragment
shader stage, which explains why this was totally broken. I
wrote a simple test locally that works now.

This fixes a crash with GTA V and DXVK.

Note that we are exporting unused parameters from the vertex
shader now, but this can't be optimized easily because we don't
keep the fragment shader info...

Cc: [email protected]
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=107477
Signed-off-by: Samuel Pitoiset <[email protected]>
Reviewed-by: Bas Nieuwenhuizen <[email protected]>

1 files changed, 17 insertions, 0 deletions

diff --git a/src/amd/vulkan/radv_pipeline.c b/src/amd/vulkan/radv_pipeline.c
index e63c481d1e7..13477231a4f 100644
--- a/src/amd/vulkan/radv_pipeline.c
+++ b/src/amd/vulkan/radv_pipeline.c
@@ -3052,6 +3052,23 @@ radv_pipeline_generate_ps_inputs(struct radeon_cmdbuf *cs,
 		ps_offset++;
 	}
 
+	if (ps->info.info.ps.num_input_clips_culls) {
+		unsigned vs_offset;
+
+		vs_offset = outinfo->vs_output_param_offset[VARYING_SLOT_CLIP_DIST0];
+		if (vs_offset != AC_EXP_PARAM_UNDEFINED) {
+			ps_input_cntl[ps_offset] = offset_to_ps_input(vs_offset, true);
+			++ps_offset;
+		}
+
+		vs_offset = outinfo->vs_output_param_offset[VARYING_SLOT_CLIP_DIST1];
+		if (vs_offset != AC_EXP_PARAM_UNDEFINED &&
+		    ps->info.info.ps.num_input_clips_culls > 4) {
+			ps_input_cntl[ps_offset] = offset_to_ps_input(vs_offset, true);
+			++ps_offset;
+		}
+	}
+
 	for (unsigned i = 0; i < 32 && (1u << i) <= ps->info.fs.input_mask; ++i) {
 		unsigned vs_offset;
 		bool flat_shade;