radv: handle prim id inputs to fragment shader.

Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Signed-off-by: Dave Airlie <airlied@redhat.com>

diff --git a/src/amd/vulkan/radv_cmd_buffer.c b/src/amd/vulkan/radv_cmd_buffer.c
index c5f6a9f..ea1d10e 100644 (file)
--- a/src/amd/vulkan/radv_cmd_buffer.c
+++ b/src/amd/vulkan/radv_cmd_buffer.c
@@ -703,7 +703,17 @@ radv_emit_fragment_shader(struct radv_cmd_buffer *cmd_buffer,
                unsigned val;
                val = S_028644_PT_SPRITE_TEX(1) | S_028644_OFFSET(0x20);
                radeon_set_context_reg(cmd_buffer->cs, R_028644_SPI_PS_INPUT_CNTL_0 + 4 * ps_offset, val);
-               ps_offset = 1;
+               ps_offset++;
+       }
+
+       if (ps->info.fs.prim_id_input && (vs->info.vs.prim_id_output != 0xffffffff)) {
+               unsigned vs_offset, flat_shade;
+               unsigned val;
+               vs_offset = vs->info.vs.prim_id_output;
+               flat_shade = true;
+               val = S_028644_OFFSET(vs_offset) | S_028644_FLAT_SHADE(flat_shade);
+               radeon_set_context_reg(cmd_buffer->cs, R_028644_SPI_PS_INPUT_CNTL_0 + 4 * ps_offset, val);
+               ++ps_offset;
        }
 
        for (unsigned i = 0; i < 32 && (1u << i) <= ps->info.fs.input_mask; ++i) {
@@ -722,6 +732,10 @@ radv_emit_fragment_shader(struct radv_cmd_buffer *cmd_buffer,
                }
 
                vs_offset = util_bitcount(vs->info.vs.export_mask & ((1u << i) - 1));
+               if (vs->info.vs.prim_id_output != 0xffffffff) {
+                       if (vs_offset >= vs->info.vs.prim_id_output)
+                               vs_offset++;
+               }
                flat_shade = !!(ps->info.fs.flat_shaded_mask & (1u << ps_offset));
 
                val = S_028644_OFFSET(vs_offset) | S_028644_FLAT_SHADE(flat_shade);