Have you licensed the source code for the EVAL-ADV8005-SMZ? Our software driver does not currently support input from JT6 so you will need to stop the software driver manually and do I2C writes or recompile the software driver to do these writes following an RS232 command.
Once you have TTL video going to the ADV8005, you can configure the ADV8005 for TTL input and simultaneous HDMI RGB output and analog RGB output with the following writes:
WriteI2C16(0x1A, 0x1A5B, 0x42);
WriteI2C16(0x1A, 0x1A5F, 0x00);
WriteI2C16(0x1A, 0x1A61, 0x06);
WriteI2C16(0x1A, 0x1AA0, 0x13);
WriteI2C16(0x1A, 0x1AA1, 0x01);
WriteI2C16(0x1A, 0x1AA2, 0x25);
WriteI2C16(0x1A, 0x1AA3, 0x1D);
WriteI2C16(0x1A, 0x1AA4, 0x81);
WriteI2C16(0x1A, 0x1AA5, 0x81);
WriteI2C16(0x1A, 0x1AA7, 0x10);
WriteI2C16(0x1A, 0x1AA8, 0xB4);
WriteI2C16(0x1A, 0x1AFE, 0x08);
WriteI2C16(0x1A, 0xE0C0, 0xC4);
WriteI2C16(0x1A, 0xE889, 0x03);
WriteI2C16(0x1A, 0xE88A, 0x46);
WriteI2C16(0x1A, 0xE88B, 0x7A);
WriteI2C16(0x1A, 0xE88C, 0x00);
WriteI2C16(0x1A, 0xE600, 0x03);
WriteI2C16(0x1A, 0xE601, 0xC5);
WriteI2C16(0x1A, 0xE602, 0x0A);
WriteI2C16(0x1A, 0xE603, 0x00);
WriteI2C16(0x1A, 0xE604, 0x03);
WriteI2C16(0x1A, 0xE605, 0xD8);
WriteI2C16(0x1A, 0xE606, 0x06);
WriteI2C16(0x1A, 0xE607, 0x00);
WriteI2C16(0x1A, 0xE608, 0x03);
WriteI2C16(0x1A, 0xE609, 0xEB);
WriteI2C16(0x1A, 0xE60A, 0x02);
WriteI2C16(0x1A, 0xE60B, 0x00);
WriteI2C16(0x1A, 0xE60C, 0x03);
WriteI2C16(0x1A, 0xE60D, 0xFD);
WriteI2C16(0x1A, 0xE60E, 0xFE);
WriteI2C16(0x1A, 0xE60F, 0x00);
WriteI2C16(0x1A, 0xE664, 0x04);
WriteI2C16(0x1A, 0xE665, 0x10);
WriteI2C16(0x1A, 0xE666, 0xFA);
WriteI2C16(0x1A, 0xE667, 0x00);
WriteI2C16(0x1A, 0xE668, 0x04);
WriteI2C16(0x1A, 0xE669, 0x23);
WriteI2C16(0x1A, 0xE66A, 0xF6);
WriteI2C16(0x1A, 0xE66B, 0x00);
WriteI2C16(0x1A, 0xE66C, 0x04);
WriteI2C16(0x1A, 0xE66D, 0x36);
WriteI2C16(0x1A, 0xE66E, 0xF2);
WriteI2C16(0x1A, 0xE66F, 0x00);
WriteI2C16(0x1A, 0x1A45, 0x00);
WriteI2C16(0x1A, 0x1A46, 0xA8);
WriteI2C16(0x1A, 0x1A47, 0x00);
WriteI2C16(0x1A, 0x1A48, 0xFB);
WriteI2C16(0x1A, 0x1A4E, 0x08);
WriteI2C16(0x1A, 0x1A4F, 0x08);
WriteI2C16(0x1A, 0xE93B, 0x40);
WriteI2C16(0x1A, 0xE949, 0xF0);
WriteI2C16(0x1A, 0x1A44, 0x88);
WriteI2C16(0x1A, 0x1A39, 0x0A);
WriteI2C16(0x1A, 0xE662, 0x81);
WriteI2C16(0x1A, 0x1A9D, 0xFF);
WriteI2C16(0x1A, 0x1A9E, 0x55);
WriteI2C16(0x1A, 0x1BC8, 0xFF);
WriteI2C16(0x1A, 0x1BC9, 0xFF);
WriteI2C16(0x1A, 0x1BCA, 0xFF);
WriteI2C16(0x1A, 0x1BCB, 0xFF);
WriteI2C16(0x1A, 0x1BCC, 0xFF);
WriteI2C16(0x1A, 0x1BCD, 0xFF);
WriteI2C16(0x1A, 0x1BCE, 0xFF);
WriteI2C16(0x1A, 0x1BCF, 0xFF);
WriteI2C16(0x1A, 0x1BD0, 0xFF);
WriteI2C16(0x1A, 0x1BD1, 0xFF);
WriteI2C16(0x1A, 0x1BD2, 0xFF);
WriteI2C16(0x1A, 0x1BD3, 0xFF);
WriteI2C16(0x1A, 0x1BD4, 0xFF);
WriteI2C16(0x1A, 0xEC41, 0x10);
WriteI2C16(0x1A, 0xEC01, 0x00);
WriteI2C16(0x1A, 0xEC02, 0x18);
WriteI2C16(0x1A, 0xEC03, 0x00);
WriteI2C16(0x1A, 0xEC13, 0xFF);
WriteI2C16(0x1A, 0xEC15, 0x20);
WriteI2C16(0x1A, 0xEC16, 0x61);
WriteI2C16(0x1A, 0xEC40, 0x80);
WriteI2C16(0x1A, 0xEC4C, 0x06);
WriteI2C16(0x1A, 0xEC55, 0x00);
WriteI2C16(0x1A, 0xEC56, 0x08);
WriteI2C16(0x1A, 0xEC73, 0x07);
WriteI2C16(0x1A, 0xEC76, 0x1F);
WriteI2C16(0x1A, 0xEC96, 0x20);
WriteI2C16(0x1A, 0xECAF, 0x96);
WriteI2C16(0x1A, 0xECBA, 0x70);
WriteI2C16(0x1A, 0xECD0, 0x44);
WriteI2C16(0x1A, 0xECD1, 0x3C);
WriteI2C16(0x1A, 0xECD3, 0x07);
WriteI2C16(0x1A, 0xECD6, 0x02);
WriteI2C16(0x1A, 0xECDB, 0x0B);
WriteI2C16(0x1A, 0xECE0, 0x90);
WriteI2C16(0x1A, 0xECE1, 0xFC);
WriteI2C16(0x1A, 0xECE3, 0xD0);
WriteI2C16(0x1A, 0xECE8, 0xF0);
WriteI2C16(0x1A, 0xECEA, 0x1D);
WriteI2C16(0x1A, 0xECED, 0x40);
WriteI2C16(0x1A, 0xECEE, 0x40);
WriteI2C16(0x1A, 0xECEF, 0x41);
WriteI2C16(0x1A, 0xECF3, 0x01);
WriteI2C16(0x1A, 0xECF5, 0xCC);
WriteI2C16(0x1A, 0xECF6, 0x08);
WriteI2C16(0x1A, 0xECF7, 0xF0);
WriteI2C16(0x1A, 0xECDA, 0x40);
WriteI2C16(0x1A, 0xECF5, 0xD4);
WriteI2C16(0x1A, 0xEC80, 0x7F);
WriteI2C16(0x1A, 0xEC81, 0x88);
WriteI2C16(0x1A, 0xEC82, 0x88);
WriteI2C16(0x1A, 0xEC83, 0x81);
WriteI2C16(0x1A, 0xEC84, 0x81);
WriteI2C16(0x1A, 0xEC85, 0x81);
WriteI2C16(0x1A, 0xEC86, 0x81);
WriteI2C16(0x1A, 0xECFC, 0x55);
WriteI2C16(0x1A, 0xEC41, 0x30);
WriteI2C16(0x1A, 0xEC41, 0x10);
WriteI2C16(0x1A, 0xF324, 0x40);
WriteI2C16(0x1A, 0xE4E0, 0x00);
WriteI2C16(0x1A, 0xE400, 0x1E);
WriteI2C16(0x1A, 0xE401, 0x10);
WriteI2C16(0x1A, 0xE402, 0x10);
WriteI2C16(0x1A, 0xE42A, 0x25);
WriteI2C16(0x1A, 0xE42B, 0x34);
WriteI2C16(0x1A, 0xE430, 0x68);
WriteI2C16(0x1A, 0xE431, 0x01);
WriteI2C16(0x1A, 0xE432, 0xFF);
WriteI2C16(0x1A, 0xE433, 0x2A);
WriteI2C16(0x1A, 0xE434, 0x40);
WriteI2C16(0x1A, 0xE435, 0x50);
WriteI2C16(0x1A, 0xE439, 0x20);
WriteI2C16(0x1A, 0xE42C, 0x03);
WriteI2C16(0x1A, 0xE42C, 0x00);
WriteI2C16(0x1A, 0x1A23, 0x38);
WriteI2C16(0x1A, 0x1A03, 0x00);
WriteI2C16(0x1A, 0x1A04, 0x00);
WriteI2C16(0x1A, 0xE401, 0x00);
WriteI2C16(0x1A, 0xE401, 0x10);
I hope this helps.
-Matt