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Boot vayu DRA7xxx EVM without 10.1" display board

Other Parts Discussed in Thread: DRA752

Hi All

can any one tell me "Boot vayu DRA7xxx EVM without 10.1" display board"?

As soon as i remove display board and try to boot, kernel hang at starting kernel.

Please find below log without display board.

U-Boot 2013.04-00096-g53fa2ad (Nov 14 2014 - 09:49:22)                          
                                                                                
CPU  : DRA752 ES1.1                                                             
Board: DRA7xx                                                                   
I2C:   ready                                                                    
DRAM:  1.5 GiB                                                                  
WARNING: Caches not enabled                                                     
MMC:   OMAP SD/MMC: 0, OMAP SD/MMC: 1                                           
Using default environment                                                       
                                                                                
In:    serial                                                                   
Out:   serial                                                                   
Err:   serial                                                                   
Card did not respond to voltage select!                                         
MMC: block number 0x22 exceeds max(0x0)                                         
efi partition table not found                                                   
Net:   <ethaddr> not set. Validating first E-fuse MAC                           
cpsw                                                                            
Hit any key to stop autoboot:  0                                                
DRA752 EVM # fatload mmc 0:1 0x80300000 uImage                                  
reading uImage                                                                  
5807400 bytes read in 1018 ms (5.4 MiB/s)                                       
DRA752 EVM # fatload mmc 0:1 0x82f80000 dra7-evm.dtb                            
reading dra7-evm.dtb                                                            
37381 bytes read in 11 ms (3.2 MiB/s)                                           
DRA752 EVM # bootm 0x80300000 - 0x82f80000                                      
## Booting kernel from Legacy Image at 80300000 ...                             
   Image Name:   Linux-3.8.13                                                   
   Image Type:   ARM Linux Kernel Image (uncompressed)                          
   Data Size:    5807336 Bytes = 5.5 MiB                                        
   Load Address: 80008000                                                       
   Entry Point:  80008000                                                       
   Verifying Checksum ... OK                                                    
## Flattened Device Tree blob at 82f80000                                       
   Booting using the fdt blob at 0x82f80000                                     
   Loading Kernel Image ... OK                                                  
OK                                                                              
   reserving fdt memory region: addr=ba300000 size=5a00000                      
   reserving fdt memory region: addr=b5200000 size=5100000                      
   reserving fdt memory region: addr=b4300000 size=f00000                       
   reserving fdt memory region: addr=8e000000 size=1000000                      
   reserving fdt memory region: addr=a0000000 size=1800000                      
   Using Device Tree in place at 82f80000, end 82f8c204                         
                                                                                
Starting kernel ...

board hang at "Starting kernel" without display board attached.

If i connect display board then boot works perfectly fine.

Regards,

Bharat Gohil

  • Most likely there is a kernel crash or hang before the UART driver(which is used for printing the boot log) is initialized
    Can you add earlyprintk bootarg while booting
    You can do it by adding this bootarg in the boot.scr or uenv.txt

    Once you have earlyprintk enabled, its easy to analyze the crash/hang