freedreno/a4xx: set PC_PRIM_VTX_CNTL.VAROUT properly

Fixes xonotic, some webgl stuff, and really pretty much anything with
more than 4 varyings.

Signed-off-by: Rob Clark <robclark@freedesktop.org>

diff --git a/src/gallium/drivers/freedreno/a4xx/fd4_emit.c b/src/gallium/drivers/freedreno/a4xx/fd4_emit.c
index 7359639..0e00e38 100644 (file)
--- a/src/gallium/drivers/freedreno/a4xx/fd4_emit.c
+++ b/src/gallium/drivers/freedreno/a4xx/fd4_emit.c
@@ -440,7 +440,12 @@ fd4_emit_state(struct fd_context *ctx, struct fd_ringbuffer *ring,
                                ->pc_prim_vtx_cntl;
 
                val |= COND(vp->writes_psize, A4XX_PC_PRIM_VTX_CNTL_PSIZE);
-               val |= COND(fp->total_in > 0, A4XX_PC_PRIM_VTX_CNTL_VAROUT(1));
+               if (fp->total_in > 0) {
+                       uint32_t varout = align(fp->total_in, 16) / 16;
+                       if (varout > 1)
+                               varout = align(varout, 2);
+                       val |= A4XX_PC_PRIM_VTX_CNTL_VAROUT(varout);
+               }
 
                OUT_PKT0(ring, REG_A4XX_PC_PRIM_VTX_CNTL, 2);
                OUT_RING(ring, val);