i.MX535 UART3 DMA

[SrideviK]

Hi,

We are using Android R10.4 BSP as our reference as our custom hardware platform is almost based on i.MX53 Sabre design.

Similar to the Sabre platform we are using UART3 for BlueTooth device interface.

Without enabling DMA, the BT works fine. Scanning & File transfers is also ok.

But on enabling DMA, am getting DMA error & the BT device access itself fails.

Pls advice on how to enable DMA or whether there are any patches available for the BSP to resolve the DMA issue.

Regards,

Sridevi

[jamesbone]

You need to check whether add 0927-ENGR00140702-3-mxc_uart-refine-driver-for-stable-Blu.patch correctly.

Because UART DMA is working but when transfer big size file using UART DMA, transmission is stopped after almost 300KB receiving.

Our Android R10.2 has fixed UART DMA problem. The attached files are the patches.