From mboxrd@z Thu Jan 1 00:00:00 1970 From: mika.westerberg@iki.fi (Mika Westerberg) Date: Fri, 23 Mar 2012 09:04:46 +0200 Subject: [PATCH] ep93xx: Implement double buffering for M2M DMA channels In-Reply-To: References: <4F683B36.8090101@metasoft.pl> <20120321193836.GC3740@mwesterb-mobl.ger.corp.intel.com> Message-ID: <20120323070446.GC5812@mwesterb-mobl.ger.corp.intel.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Thu, Mar 22, 2012 at 09:19:10PM -0500, H Hartley Sweeten wrote: > Did you test this patch or just review it? I tested and reviewed it. > On my system it doesn't work. I think it has something to do with the > changes to m2m_hw_interrupt but I haven't tracked it down yet. > > It looks like what's missing is a: > > edmac->edma->hw_submit(edmac); > > But, maybe that's not needed with double buffering? Did you try without your patch and adding my VIC hack? That's what I did when I first got this patch and I saw no problems. I tested with audio (M2P), mmc_spi (M2M) and dmatest (M2M).