freedreno/a4xx: temp hack for FLAT varyings

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

diff --git a/src/gallium/drivers/freedreno/a4xx/fd4_program.c b/src/gallium/drivers/freedreno/a4xx/fd4_program.c
index 4f2a88f872292792c4c9f6b29d07305462f43495..76cadcccfa5fd667b9ff20208186fde2df6cd4ba 100644 (file)
--- a/src/gallium/drivers/freedreno/a4xx/fd4_program.c
+++ b/src/gallium/drivers/freedreno/a4xx/fd4_program.c
@@ -431,6 +431,25 @@ fd4_program_emit(struct fd_ringbuffer *ring, struct fd4_emit *emit)
                        }
                }
 
+               /* HACK: looks like we need to do int varyings in the frag
+                * shader on a4xx (no flatshad reg?):
+                *
+                *    (sy)(ss)nop
+                *    (sy)ldlv.u32 r0.x,l[r0.x], 1
+                *    ldlv.u32 r0.y,l[r0.x+1], 1
+                *    (ss)bary.f (ei)r63.x, 0, r0.x
+                *    (ss)(rpt1)cov.s32f16 hr0.x, (r)r0.x
+                *    (rpt5)nop
+                *    sam (f16)(xyzw)hr0.x, hr0.x, s#0, t#0
+                *
+                * for now, don't set FLAT on vinterp[], since that
+                * at least works well enough for pure float impl (ie.
+                * pre glsl130).. we'll have to do a bit more work to
+                * handle this properly:
+                */
+               for (i = 0; i < ARRAY_SIZE(vinterp); i++)
+                       vinterp[i] = 0;
+
                OUT_PKT0(ring, REG_A4XX_VPC_ATTR, 2);
                OUT_RING(ring, A4XX_VPC_ATTR_TOTALATTR(s[FS].v->total_in) |
                                A4XX_VPC_ATTR_THRDASSIGN(1) |