r600g: fix fp-fragment-position test.

diff --git a/src/gallium/drivers/r600/r600_shader.c b/src/gallium/drivers/r600/r600_shader.c
index dae378197895cbb3605d698848da5817658751f5..d81308b211e2f708586780afc81c2e000c641909 100644 (file)
--- a/src/gallium/drivers/r600/r600_shader.c
+++ b/src/gallium/drivers/r600/r600_shader.c
@@ -207,6 +207,7 @@ static int r600_pipe_shader_ps(struct pipe_context *ctx, struct r600_context_sta
        if (have_pos) {
                state->states[R600_PS_SHADER__SPI_PS_IN_CONTROL_0] |=  S_0286CC_POSITION_ENA(1) |
                                                                       S_0286CC_BARYC_SAMPLE_CNTL(1);
+               state->states[R600_PS_SHADER__SPI_INPUT_Z] |= 1;
        }
        state->states[R600_PS_SHADER__SPI_PS_IN_CONTROL_1] = 0x00000000;
        state->states[R600_PS_SHADER__SQ_PGM_RESOURCES_PS] = S_028868_NUM_GPRS(rshader->bc.ngpr) |