On Wed, Jul 10, 2019 at 02:24:48PM -0700, Curtis Malainey wrote: > On Wed, Jul 10, 2019 at 9:43 AM Andy Shevchenko > <andriy.shevchenko@xxxxxxxxxxxxxxx> wrote: > > On Tue, Jul 09, 2019 at 12:27:49PM -0700, Curtis Malainey wrote: > > > Thanks for the information, we are running a 4.14 kernel so we don't > > > have the idma32 driver, I will see if I can backport it and report > > > back if the fix works. > > > > Driver is supporting iDMA 32-bit in v4.14 AFAICS. > > The missed stuff is a split and some fixes here and there. > > Here is the list of patches I have in a range v4.14..v5.2 > > (I deliberately dropped the insignificant ones) > > > > 934891b0a16c dmaengine: dw: Don't pollute CTL_LO on iDMA 32-bit > > 91f0ff883e9a dmaengine: dw: Reset DRAIN bit when resume the channel > > 69da8be90d5e dmaengine: dw: Split DW and iDMA 32-bit operations > > 87fe9ae84d7b dmaengine: dw: Add missed multi-block support for iDMA 32-bit > > ffe843b18211 dmaengine: dw: Fix FIFO size for Intel Merrifield > > 7b0c03ecc42f dmaengine: dw-dmac: implement dma protection control setting > > > > For me sounds like fairly easy to backport. > > > I got the code integrated, and ran some tests. The test device > regularly hits a BUG_ON in the dw/core.c, debug is turned on in dw > core I see. We need ASoC guys to shed a light here. I don't know that part at all. Only last suggestion I have is to try remove multi-block setting from the platform data (it will be emulated in software if needed). But I don't believe the DMA for audio has no such feature enabled. > We have only been able to consistently reproduce the DMA boot issue on > our original code consistently on 1 device and sporadically on another > handful of devices. > When the device did finally booted after 2-3 device crashes the device > failed to load the DSP. Yeah, it has something to do with this firmware loader code... > [ 3.709573] sst-acpi INT3438:00: DesignWare DMA Controller, 8 channels > [ 3.959027] haswell-pcm-audio haswell-pcm-audio: error: audio DSP > boot timeout IPCD 0x0 IPCX 0x0 > [ 3.970336] bdw-rt5677 bdw-rt5677: ASoC: failed to init link System PCM -- With Best Regards, Andy Shevchenko
