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[why] In the case of an external monitor disconnection, the kernel mode will attempt to post new timing validation with two path counts (eDP + external monitor removed to virtual). [how] Skip validating color depth and pixel encoding in the scenario involving a DP to HDMI active converter dongle. Reviewed-by: Wenjing Liu <wenjing.liu@amd.com> Signed-off-by: Jingwen Zhu <Jingwen.Zhu@amd.com> Signed-off-by: Wayne Lin <wayne.lin@amd.com> Tested-by: Daniel Wheeler <daniel.wheeler@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>