Hi, "nollp" parameter defines if DW DMAC channel supports multi block transfer or not. It is calculated in runtime, but differently depending on on availability of pdata. If pdata is absent "nollp" is calculated using autoconfig hardware registers. Otherwise "nollp" is calculated using the next code construction: channel_writel(dwc, LLP, DWC_LLP_LOC(0xffffffff)); dwc->nollp = DWC_LLP_LOC(channel_readl(dwc, LLP)) == 0; channel_writel(dwc, LLP, 0); I realized that these methods give different results. For example on ARC AXS101 SDP in case of using autoconfig "nollp" was calculated as "true" (and DMAC works fine),? otherwise "nollp" was calculated as "false" (and DMAC doesn't work). So I'm wondering how the code in question really works?
