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ADV7619 4K variable line width

Question asked by lio on Nov 25, 2015
Latest reply on Feb 5, 2016 by JeyasudhaMuthuPerumal

Hello,

 

I have got some issue when receiving a 4096x2160p@24Hz signal.

 

The data enable we receive must be 2048T long per line, but sometimes, the received DE signal is not that length. (I checked that using an internal counter in our FPGA in the video clock domain)

The result frame is jittering and looks like the attached file.

 

Sometimes it's working correctly, depending on the start condition (??) but most of the time, it's not.

 

I also tried different phases for the LLC output.

The size of the qualifier could be +1 with several phases, but most of the time, it's -1.

But none of them, give us a correct result. I mean, it fails at least one time for each phase.

 

The configuration script I used is : ADV7619-VER.1.4c.txt

 

## 4kx2k out through DAC ##

:4kx2k 444 lower part of bus:

98 FF 80 ; I2C reset

98 F4 80 ; CEC

98 F5 7C ; INFOFRAME

98 F8 4C ; DPLL

98 F9 64 ; KSV

98 FA 6C ; EDID

98 FB 68 ; HDMI

98 FD 44 ; CP

68 C0 03 ; ADI Recommended Write

98 01 06 ; Prim_Mode =110b HDMI-GR

98 02 F2 ; Auto CSC, RGB out, Set op_656 bit

98 03 54 ; 2x24 bit SDR 444 interleaved mode 0

98 05 28 ; AV Codes Off

98 06 A0 ; No inversion on VS,HS pins

98 0C 42 ; Power up part

98 15 80 ; Disable Tristate of Pins

98 19 83 ; LLC DLL phase

98 33 40 ; LLC DLL MUX enable

98 DD A0 ; LLC Half frequency

4C B5 01 ; Setting MCLK to 256Fs

4C C3 80 ; ADI recommended writes (HiFreq)

4C CF 03 ; ADI recommended writes (HiFreq)

68 C0 03 ; ADI Required write

68 00 08 ; Set HDMI Input Port A (BG_MEAS_PORT_SEL = 001b)

68 02 03 ; ALL BG Ports enabled

68 03 98 ; ADI Required Write

68 10 A5 ; ADI Required Write

68 45 04 ; ADI Required Write

68 97 C0 ; ADI Required Write

68 3D 10 ; ADI Required Write

68 3E 69 ; ADI reccommended writes

68 3F 46 ; ADI reccommended writes

68 4E FE ; ADI reccommended writes

68 4F 08 ; ADI reccommended writes

68 50 00 ; ADI Recommended Write

68 57 A3 ; ADI reccommended writes

68 58 07 ; ADI reccommended writes

68 83 FC ; Enable clock terminators for port A & B

68 84 03 ; FP MODE

68 85 10 ; ADI recommended setting

68 86 9B ; ADI recommended setting

68 89 03 ; HF Gain

68 9B 03 ; ADI recommended setting

68 93 03 ; ADI recommended setting

68 5A 80 ; ADI recommended setting

End

 

Thanks for your help,

 

Lionel

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