isp cam source config register
| CAM_DATA_ORDER | this field configures data order of cam port, 0: cam_data_in, 1:{cam_data_in[7:0], cam_data_in[15:8]} | 
| CAM_2BYTE_MODE | this field configures enable of cam 2 byte mode(input 2 bytes each clock). 0: disable, 1: enable | 
| CAM_DATA_TYPE | this field configures idi data type for image data, 0x2a: RAW8, 0x2b: RAW10, 0x2c: RAW12 | 
| CAM_DE_INV | this bit configures cam data enable invert. 0: not invert, 1: invert | 
| CAM_HSYNC_INV | this bit configures cam hsync invert. 0: not invert, 1: invert | 
| CAM_VSYNC_INV | this bit configures cam vsync invert. 0: not invert, 1: invert | 
| CAM_VSYNC_FILTER_THRES | this bit configures the number of clock of vsync filter length | 
| CAM_VSYNC_FILTER_EN | this bit configures vsync filter en |