请教个问题，关于CCDC的busy状态， The CCDC_PCR 1] BUSY status bit is set when the start of frame occurs (if the CCDC_PCR[0] ENABLE
bit is 1 at that time). It is automatically reset to 0 at the end of a frame. 手册上是这样说的，那么使用bt656模式时，如何判断帧的开始和结束？
我使用tvp5146采集pal60制式，bt656的数据流，出现如下信息
[ 6.003845] ccdc_vd0_isr fid 8000 cnt 66
[ 6.020507] ccdc_vd0_isr fid 0 cnt 67
[ 6.026275] omap3isp omap3isp: CCDC won't become idle!
[ 6.037231] ccdc_vd0_isr fid 8000 cnt 68
[ 6.053894] ccdc_vd0_isr fid 0 cnt 69
[ 6.059661] omap3isp omap3isp: CCDC won't become idle!
能够识别奇偶场，但是区分不了帧
