ref_pll 276 drivers/gpu/drm/ast/ast_main.c uint32_t denum, num, div, ref_pll, dsel; ref_pll 368 drivers/gpu/drm/ast/ast_main.c ref_pll = 14318; ref_pll 370 drivers/gpu/drm/ast/ast_main.c ref_pll = 12000; ref_pll 387 drivers/gpu/drm/ast/ast_main.c ast->mclk = ref_pll * (num + 2) / ((denum + 2) * (div * 1000));