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[Why] If two monitors with TMDS signals were timing synced and one was disconnected, the stream would go out of sync too early due to the PLL turning off and the system could hang [How] On link disable output, change PHY FSM transition from TX_EN-to-PHY_OFF to TX_EN-to-PLL_ON for TMDS Reviewed-by: Wenjing Liu <wenjing.liu@amd.com> Signed-off-by: Ryan Seto <ryanseto@amd.com> Signed-off-by: Fangzhi Zuo <jerry.zuo@amd.com> Tested-by: Daniel Wheeler <daniel.wheeler@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>