+void evergreen_polygon_offset_update(struct r600_pipe_context *rctx)
+{
+ struct r600_pipe_state state;
+
+ state.id = R600_PIPE_STATE_POLYGON_OFFSET;
+ state.nregs = 0;
+ if (rctx->rasterizer && rctx->framebuffer.zsbuf) {
+ float offset_units = rctx->rasterizer->offset_units;
+ unsigned offset_db_fmt_cntl = 0, depth;
+
+ switch (rctx->framebuffer.zsbuf->texture->format) {
+ case PIPE_FORMAT_Z24X8_UNORM:
+ case PIPE_FORMAT_Z24_UNORM_S8_USCALED:
+ depth = -24;
+ offset_units *= 2.0f;
+ break;
+ case PIPE_FORMAT_Z32_FLOAT:
+ depth = -23;
+ offset_units *= 1.0f;
+ offset_db_fmt_cntl |= S_028B78_POLY_OFFSET_DB_IS_FLOAT_FMT(1);
+ break;
+ case PIPE_FORMAT_Z16_UNORM:
+ depth = -16;
+ offset_units *= 4.0f;
+ break;
+ default:
+ return;
+ }
+ offset_db_fmt_cntl |= S_028B78_POLY_OFFSET_NEG_NUM_DB_BITS(depth);
+ r600_pipe_state_add_reg(&state,
+ R_028B80_PA_SU_POLY_OFFSET_FRONT_SCALE,
+ fui(rctx->rasterizer->offset_scale), 0xFFFFFFFF, NULL);
+ r600_pipe_state_add_reg(&state,
+ R_028B84_PA_SU_POLY_OFFSET_FRONT_OFFSET,
+ fui(offset_units), 0xFFFFFFFF, NULL);
+ r600_pipe_state_add_reg(&state,
+ R_028B88_PA_SU_POLY_OFFSET_BACK_SCALE,
+ fui(rctx->rasterizer->offset_scale), 0xFFFFFFFF, NULL);
+ r600_pipe_state_add_reg(&state,
+ R_028B8C_PA_SU_POLY_OFFSET_BACK_OFFSET,
+ fui(offset_units), 0xFFFFFFFF, NULL);
+ r600_pipe_state_add_reg(&state,
+ R_028B78_PA_SU_POLY_OFFSET_DB_FMT_CNTL,
+ offset_db_fmt_cntl, 0xFFFFFFFF, NULL);
+ r600_context_pipe_state_set(&rctx->ctx, &state);
+ }
+}
+