On 18/10/2018 13:41, Andy Shevchenko wrote: > On Thu, Oct 18, 2018 at 11:50:24AM +0100, Gustavo Pimentel wrote: >> On 18/10/2018 09:02, Peter Ujfalusi wrote: >>> On 2018-10-17 14:42, Gustavo Pimentel wrote: >>> Fixed up the email addresses.. > >>>> I'm implementing a new DMA driver for an IP and I've used /drivers/dma/dw/* >>>> driver has reference. This driver uses DMA engine framework. >>>> >>>> Now I would like to start testing my new driver by using DMAtest tool, I've >>>> follow the instructions written on [1], but I don't get any output from it. >>>> I think DMAtest didn't even started... Can you help to track down this? > >>> Do you have support for DMA_MEM_TO_MEM and implementation for the >>> device_prep_dma_memcpy callback? > >>> If yes, then add debug to your device_prep_dma_memcpy first to see if it >>> goes well, then to your device_issue_pending and device_tx_status callbacks. > >> Unfortunately I don't have it. I only have support for DMA_DEV_TO_MEM and >> DMA_MEM_TO_DEV. > > You can't use dmatest for such engine. > > Hint: find an SPI or UART controller and do a loopback test with DMA enabled. > Ok, thanks for the hint.
