question for i.mx6 IPU

[dingyanhong]

we are porting RTOS system for imx6 platform and have an issue for IPU function.

Is that possible to change the parameter (such as width/height/u offset etc.) for CPMEM channel buffer without closing the channel?

We need to do Seamless switch for different resolution movies，it is more simple if the bg channel can output different resolution image (like from 720p to 1080p) without close the bg channel.

Or do you have any other proposal for this kind of function?

thanks!

[Yuri]

According to Table 37-41 (Internal Memories Access Support and Limitations)

of the i.MX6 DQ Reference Manual regardin CPMEM : "IDMAC channel parameters

must not be changed in the CPM when the corresponding DMA channel is enabled

excluding the base addresses (EBA0 and EBA1)."