HDMI-GR input video selected as VGA but by providing HDMI input, device able to convert RGB888 format.

Question

Hi, HDMI-GR input video selected as VGA but by providing HDMI input, device able to convert RGB888 format. 
 As per my knowledge HDMI data is digital & VGA is analog. 
 
 In HDMI-GR mode I am providing HDMI as input and I am able to generate RGB888. but VGA means analog, still how it is working? 
 Thanks & Regards, Mallikarjuna

PoornimaSubramani · Accepted Answer

Hi, 
 Please use below configuration and configure "40 00 0C" VID_STD=01100b for XGA60. 
 50 10 01 ; 36 output through DACs 
 50 19 10 ; ADV7842 Mode 
 50 1B 02 ; ADV7511 
 50 20 00 ; De-assert HDP 
 40 FF 80 ; I2C reset 
 40 F1 90 ; SDP map 
 40 F2 94 ; SDPIO map 
 40 F3 84 ; AVLINK 
 40 F4 80 ; CEC 
 40 F5 7C ; INFOFRAME 
 40 F8 4C ; AFE 
 40 F9 64 ; KSV 
 40 FA 6C ; EDID 
 40 FB 68 ; HDMI 
 40 FD 44 ; CP 
 40 FE 48 ; VDP 
 40 01 06 ; Prim_Mode =110b HDMI-GR 
 40 02 F6 ; Auto input color space, Limited Range RGB Output 
 40 03 42 ; 36 bit SDR 444 Mode 0 
 40 05 28 ; AV Codes Off 
 68 C1 FF ; HDMI power control (power saving) 
 68 C2 FF ; HDMI power control (power saving) 
 68 C3 FF ; HDMI power control (power saving) 
 68 C4 FF ; HDMI power control (power saving) 
 68 C5 00 ; HDMI power control (power saving) 
 68 C6 00 ; HDMI power control (power saving) 
 68 C0 FF ; HDMI power control (power saving) 
 40 0C 40 ; Power up part and power down VDP 
 40 15 80 ; Disable Tristate of Pins 
 40 19 83 ; LLC DLL phase 
 40 33 40 ; LLC DLL enable 
 44 BA 01 ; Set HDMI FreeRun 
 44 3E 00 ; Disable CP Pregain Block 
 44 6C 00 ; Use fixed clamp values 
 4C 00 FF ; Power Down ADC's and there associated clocks 
 4C 01 FE ; Power down ref buffer_bandgap_clamps_sync strippers_input mux_output buffer 
 4C B5 01 ; Setting MCLK to 256Fs 
 68 00 32 ; Set HDMI Input Port A (Enable BG monitoring) 
 68 01 18 ; Enable clock terminators 
 68 0D 34 ; ADI recommended write&ensp;&ensp;&ensp;&ensp;&ensp;&ensp;&ensp;&ensp;&ensp;&ensp; 
 68 1A 8A ; Unmute audio 
 68 3D 10 ; HDMI ADI recommended write 
 68 44 85 ; TMDS PLL Optimization 
 68 46 1F ; ADI Recommended Write ES3/Final silicon 
 68 60 88 ; TMDS PLL Optimization 
 68 61 88 ; TMDS PLL Optimization 
 68 6C 18 ; Disable ISRC clearing bit, Improve robustness 
 68 57 B6 ; TMDS PLL Optimization 
 68 58 03 ; TMDS PLL Setting 
 68 75 10 ; DDC drive strength 
 68 85 1F ; ADI Equaliser Setting 
 68 87 70 ; HDMI Recommended write 
 68 89 04 ; ADI Equaliser Setting 
 68 8A 1E ; ADI Equaliser Setting 
 68 93 04 ; ADI Equaliser Setting 
 68 94 1E ; ADI Equaliser Setting 
 68 9D 02 ; ADI Equaliser Setting 
 68 99 A1 ; HDMI ADI recommended write 
 68 9B 09 ; HDMI ADI recommended write 
 68 C9 01 ; HDMI free Run based on PRIM_MODE, VID _STD 
 
 Thanks, 
 Poornima)

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HDMI-GR input video selected as VGA but by providing HDMI input, device able to convert RGB888 format.