dram_pnstring    2109 drivers/gpu/drm/amd/include/atomfirmware.h   char    dram_pnstring[20];               // part number end with '0'. 
dram_pnstring    2191 drivers/gpu/drm/amd/include/atomfirmware.h   char    dram_pnstring[20];               // part number end with '0'