CK_POL 200 drivers/gpu/drm/mediatek/mtk_dpi.c pol = (dpi_pol->ck_pol == MTK_DPI_POLARITY_RISING ? 0 : CK_POL) | CK_POL 205 drivers/gpu/drm/mediatek/mtk_dpi.c CK_POL | DE_POL | HSYNC_POL | VSYNC_POL);