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ADV7480 Production
The ADV7480 is a combined HDMI®/MHL® receiver targeted at connectivity enabled head units requiring a wired, uncompressed digital audio/video link from...
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ADV7480 on Analog.com

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[ADV7480] EDID 1.4 is not recognized by the PC audio driver



		

			

									
					    HTCV3
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Dec 21, 2022 
				
			
			
		
    

				
		
    
		    		    
		    
		    		            		        
    Category: Software
    
    		        		        		    		    	
			
    Hi,
    

    This is confirmed on a prototype board using the ADV7480. 
    

    EDID Ver.1.4 is not recognized by the PC audio driver, but EDID Ver.1.3 is recognized. 
    

    Please tell me what is causing this.
    

    

    Best regards.
    

    

    
								
    

				
				
		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    


	















    
	
    
	
    
					



			








	
	
	
	



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      •  Analog Employees  
      
            
			                            
                        
                on Dec 21, 2022 12:29 PM
            
            
					
      
	
      

		
		
      
					
      Hi,
      

        HDMI works with both EDID 1.3 and 1.4 and also note that the difference between EDID 1.3 and EDID 1.4 only affect the VESA block.
      

        Please let us know, Have you verified the same in back-to-back (direct) Connection?
      

        Please note that, by using Consumer electronic equipment (Players) or PCs as an HDMI audio/video source can be very difficult since their functionality depends on their settings as well as the HDMI receiver's EDID
        For example everything depends on the source. If the source doesn't get a valid EDID it may just begin transmitting in DVI mode with no audio and no HDCP.
      

      PC/Laptop generally do not work unless they see a valid EDID & PC will only recognize a sink only when they detect an valid EDID So please make sure whether you are configuring with a valid EDID.
      Please make sure with below when bringing up the board.
       1) Disconnect PC from ADV748x
       2) Run your script
       3) Configure EDID
       5) Plug PC into ADV748x this should cause the PC to read the EDID
      

      

      Thanks,
      

      Poornima
      
			
      

		
		
		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
						
						
				
				
		
		
      
			
		
      
	
      

      

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													0
							
			
				
									
							        
			
			
			
      •  Analog Employees  
      
            
			                            
                        
                on Dec 21, 2022 12:29 PM
            
            
					
      
	
      

		
		
      
					
      Hi,
      

        HDMI works with both EDID 1.3 and 1.4 and also note that the difference between EDID 1.3 and EDID 1.4 only affect the VESA block.
      

        Please let us know, Have you verified the same in back-to-back (direct) Connection?
      

        Please note that, by using Consumer electronic equipment (Players) or PCs as an HDMI audio/video source can be very difficult since their functionality depends on their settings as well as the HDMI receiver's EDID
        For example everything depends on the source. If the source doesn't get a valid EDID it may just begin transmitting in DVI mode with no audio and no HDCP.
      

      PC/Laptop generally do not work unless they see a valid EDID & PC will only recognize a sink only when they detect an valid EDID So please make sure whether you are configuring with a valid EDID.
      Please make sure with below when bringing up the board.
       1) Disconnect PC from ADV748x
       2) Run your script
       3) Configure EDID
       5) Plug PC into ADV748x this should cause the PC to read the EDID
      

      

      Thanks,
      

      Poornima
      
			
      

		
		
		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
						
						
				
				
		
		
      
			
		
      
	
      

      

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