REFCLK_CLOCK_EN_ALLOW_SRC_SEL 5151 drivers/gpu/drm/amd/include/navi10_enum.h REFCLK_CLOCK_EN_ALLOW_SRC_SEL            = 0x00000001,
REFCLK_CLOCK_EN_ALLOW_SRC_SEL 11009 drivers/gpu/drm/amd/include/vega10_enum.h REFCLK_CLOCK_EN_ALLOW_SRC_SEL            = 0x00000001,