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DM8168 HDMI: wave noise in output

Hi,

My customer tried below path, but saw wave noise near the boundary (big color difference) such as charactors in the image.

           {VPSS_DC_BP0_INPUT_PATH, VPSS_DC_VCOMP_MUX},
           {VPSS_DC_VCOMP_MUX, VPSS_DC_VCOMP},
           {VPSS_DC_CIG_NON_CONSTRAINED_OUTPUT, VPSS_DC_HDMI_BLEND},

There will be no such wave if using below path.

           {VPSS_DC_BP0_INPUT_PATH, VPSS_DC_HDCOMP_MUX},
           {VPSS_DC_HDCOMP_MUX, VPSS_DC_CIG_PIP_INPUT},
           {VPSS_DC_CIG_PIP_OUTPUT, VPSS_DC_HDMI_BLEND},


Customer is using hdvpss_01_00_01_26. I think EDE and CPROC should be in bypass in default, right? If yes, what may cause the problem? If not, would you pls kinldy advise how to bypass EDE, CPROC.