Hi Laurent, Thanks for the replay, I've removed earlier mail content and only keep you question: On Tue, Aug 20, 2013 at 8:53 PM, Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx> wrote: > Hi Jiaquan, > > I'm not sure if that's needed here. Vendor-specific formats still need to be > documented, so we could just create a custom YUV format for your case. Let's > start with the beginning, could you describe what gets transmitted on the bus > when that special format is selected ? > > -- > Regards, > > Laurent Pinchart > For YUV420P format, the data format sent from IPC is similar to V4L2_MBUS_FMT_YUYV8_1_5X8, but the content for each line is different: For odd line, it's YYU YYU YYU... For even line, it's YYV YYV YYV... then DMA engine send them to RAM in planar format. For YUV420SP format, the data format sent from IPC is YYUV YYUV YYUV(maybe called V4L2_MBUS_FMT_YYUV8_2X8?), but DMA engine drop UV every other line, then send them to RAM as semi-planar. Well, the first data format is too odd, I don't have a clue how to call it, do you have suggestion? Thanks a lot! Jiaquan -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
