On Mon, 2016-10-24 at 15:43 +0200, Stefan Roese wrote: > Hi Andy, > The DMA controller is powered and generates an interrupt: > > [ 30.308167] dw_dmac_pci 0000:00:1e.0: dw_dma_interrupt: status=0x1 > [ 30.308179] dw_dmac_pci 0000:00:1e.0: dw_dma_tasklet: status_err=0 > > Still no data transferred to the PCI memory space (FPGA). The > parameters passed to dwc_prep_dma_memcpy() seem to okay at first > glance. I'll debug a bit to see, if I find a problem here. > > One related question: > Do you know if and how the memory-to-memory transfer has been tested > lately on such x86 platforms? I used some ugly hack to power on the device (i.e. pm_runtime_get_sync() when allocating channel and pm_runtime_put() at freeing) and run dmatest on it. You may try it yourself (for PCI it would probably do not need any hacks) and report any bugs you notice. -- Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx> Intel Finland Oy -- To unsubscribe from this list: send the line "unsubscribe dmaengine" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
