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MAX96724 Recommended for New Designs
The MAX96724/F/R deserializer converts four GMSL2/1 inputs to 1, 2, or 4 MIPI D-PHY or C-PHY outputs. The device allows simultaneous transmit bidirectional...
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MAX96724 on Analog.com

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evaluating max96724 eval kit with kria som

		
	
				

			

									
					    Yuba
					
							

            
            			
				
									
											
			
			
				
			
			
			    	
			                    
                
				                on Jan 24, 2025 
				
			
			
		

		
		                    	    

        	    
Thread Summary

                The user encountered issues with the MAX96724 deserializer and C1 camera module on the AMD Kria platform, where the media node failed to register due to a non-responding I2C subdev serializer. The problem was resolved by setting the CFG pins to 0x00, which allowed the media node to register and the user to capture frames from the sensor.
                        	    

                
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Category: Software

    		        		            		    
Product Number:  max96724-bak-evk 

    		        		        		        
Software Version: linux 

    		    		    

		    		    
		    			

			    
brief: 


I am having problems to evaluate the max96724 deserialzer with c1 moduel as recommended by the wiki and followed the steps AMD Kria User Guide [Analog Devices Wiki]. The media node fails to get registered, as i2c-subdev serializer is not responding.


I am using only one c1 camera module and also using the correct device-tree for 1cam, which is shared in the new sd-image. 




As debug I tried the following, 


1- swapping with new coax cables for the camera module, 


2- ensuring the switch settings on the adapter, ensuring the correct or default jumper settings from evk-user guide, connecting the camera module to the J7 connector (INA) 


3- the wiki is missing instructions to insert the 12V baller jack power supply to the eval kit and turn on the ON switch. 


4- I followed the EVK with GMSL GUI to read and write a couple of register as described in the ser-des userguide under the section "I2c braodcasting GMSL2 programming examples"




the first instruction to enable Link A goes through, while the second instruction to change the device address for serializer fails with a NACK operation. 




Here are the commands which also reflect in the max MAX9295D UG as well.






0x4E,0x0003,0xFE






0x80,0x0000,0x82




5- I replaced the c1 camera module with a known good camera module with the same SER device (LI-VENUS-OX03F10-9295-075H), faild to get any response from the serializer. 




 


 





			

			
									
		                             
                        

    

                                            
                 software
                
                                                    
                 max96724-bak-evk
                
                                                    
                 interface
                
                                                    
                 linux
                
                                                    
                 Gigabit Multimedia Serial Link™ (GMSL)
                
                                
            

    
    
		


				
				        
        		

			
						
									
												
			
			
                        
                                    
                        
                        
                        
            
			            
						
						
			
			
			
			
		


        
        
        
    
					

			





















	

	

					



			


			
	













	
			








	






































     



















		        
        

            
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