Hi Eugeniy, > -----Original Message----- > From: Eugeniy Paltsev <Eugeniy.Paltsev@xxxxxxxxxxxx> > Sent: Monday, July 22, 2019 12:32 PM > To: linux-snps-arc@xxxxxxxxxxxxxxxxxxx; Vineet Gupta <vgupta@xxxxxxxxxxxx> > Cc: linux-kernel@xxxxxxxxxxxxxxx; Alexey Brodkin <abrodkin@xxxxxxxxxxxx>; Eugeniy Paltsev > <Eugeniy.Paltsev@xxxxxxxxxxxx> > Subject: [PATCH v2] ARC: [plat-hsdk]: allow to switch between AXI DMAC port configurations > > We want to use DW AXI DMAC on HSDK board in our automated verification > to test cache & dma kernel code changes. This is perfect candidate > as we don't depend on any external peripherals like MMC card / USB > storage / etc. > To increase test coverage we want to test both options: > * DW AXI DMAC is connected through IOC port & dma direct ops used > * DW AXI DMAC is connected to DDR port & dma noncoherent ops used > > Introduce 'arc_hsdk_axi_dmac_coherent' global variable which can be > modified by debugger (same way as we patch 'ioc_enable') to switch > between these options without recompiling the kernel. > Depend on this value we tweak memory bridge configuration and > "dma-coherent" DTS property of DW AXI DMAC. Looks good to me. Acked-by: Alexey Brodkin <abrodkin@xxxxxxxxxxxx> -Thanks _______________________________________________ linux-snps-arc mailing list linux-snps-arc@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/linux-snps-arc
