Messages in this thread | | | Subject | Re: Issues with i.MX SPI DMA transfers | From | Igor Plyatov <> | Date | Thu, 28 Mar 2019 14:05:59 +0300 |
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Dear Robin,
I have applied patches 0001-dma-engine-imx-sdma-add-mcu_2_ecspi-script.patch, 0002-spi-spi-imx-fix-ERR009165.patch and made testing.
Results are following:
root@cr7:~# spidev_test -D /dev/spidev0.0 -s 12000000 -b 8 -S 512 -I 10000000000 -l spi mode: 0x20 bits per word: 8 max speed: 12000000 Hz (12000 KHz) [ 133.987798] spi_imx 2008000.spi: I/O Error in DMA TX [ 133.992810] spidev spi0.0: SPI transfer failed: -110 [ 133.997860] spi_master spi0: failed to transfer one message from queue can't send spi message: Connection timed out Aborted (core dumped)
root@cr7:~# spidev_test -D /dev/spidev1.0 -s 12000000 -b 8 -S 512 -I 10000000000 -l spi mode: 0x20 bits per word: 8 max speed: 12000000 Hz (12000 KHz) [ 483.530815] spi_imx 200c000.spi: I/O Error in DMA TX [ 483.535825] spidev spi1.0: SPI transfer failed: -110 [ 483.540873] spi_master spi1: failed to transfer one message from queue can't send spi message: Connection timed out Aborted (core dumped)
root@cr7:~# spidev_test -D /dev/spidev4.0 -s 12000000 -b 8 -S 512 -I 10000000000 -l spi mode: 0x20 bits per word: 8 max speed: 12000000 Hz (12000 KHz) [ 94.228774] spi_imx 2018000.spi: I/O Error in DMA TX [ 94.233788] spidev spi4.0: SPI transfer failed: -110 [ 94.238837] spi_master spi4: failed to transfer one message from queue can't send spi message: Connection timed out Aborted (core dumped)
Best wishes.
--
Igor Plyatov
> Hi Igor, > Please have a try with the attached patch, assume you have already used the sdma firmware > From https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/tree/imx/sdma/sdma-imx6q.bin >> -----Original Message----- >> From: Igor Plyatov <plyatov@gmail.com> >> Sent: 2019年3月28日 15:04 >> To: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> >> Cc: linux-kernel@vger.kernel.org; linux-arm-kernel@lists.infradead.org; >> linux-spi@vger.kernel.org; dl-linux-imx <linux-imx@nxp.com>; Fabio Estevam >> <festevam@gmail.com>; Pengutronix Kernel Team <kernel@pengutronix.de>; >> Sascha Hauer <s.hauer@pengutronix.de>; Shawn Guo >> <shawnguo@kernel.org>; Mark Brown <broonie@kernel.org>; >> dmaengine@vger.kernel.org; Vinod Koul <vkoul@kernel.org>; Dan Williams >> <dan.j.williams@intel.com>; Andy Duan <fugang.duan@nxp.com>; Han Xu >> <han.xu@nxp.com>; Robin Gong <yibin.gong@nxp.com>; Clark Wang >> <xiaoning.wang@nxp.com> >> Subject: Re: Issues with i.MX SPI DMA transfers >> >> Dear Uwe, >> >> >>> Hello Igor, >>> >>> On Wed, Mar 27, 2019 at 08:40:00PM +0300, Igor Plyatov wrote: >>>> please, help to resolve two issues with SPI DMA transfers at i.MX6Q >>>> platform. >>>> >>>> First issue is >>>> [ 4465.008003] spi_master spi0: I/O Error in DMA RX >>>> >>>> Second issue is duplication for one of received bytes. >>>> >>>> Probably, these issues related to each one. >>> This is probably the same problem I hit some time ago. Check ERR009165 >>> in the errata. You either need to disable DMA or need a fixed >>> sdma-Script. >> disabling of DMA is not an option, because high throughput required for SPI bus >> to communicate with DSPs. >> >> I'm aware of ERR009165, but as I write some minutes earlier to list, >> spi0 (alias for ecspi1) and spi1 (alias for ecspi2) work flawless, while >> spi4 (alias for ecspi5) fails very fast. >> >> Does same SDMA script used for all SPI interfaces or scripts are different? >> >> Best wishes. >> >> -- >> >> Igor Plyatov
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