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Date: Mon, 19 Sep 2022 18:45:13 -0400 From: Sean Anderson <sean.anderson@...o.com> To: Leo Li <leoyang.li@....com>, Oleksij Rempel <linux@...pel-privat.de>, Pengutronix Kernel Team <kernel@...gutronix.de>, "linux-i2c@...r.kernel.org" <linux-i2c@...r.kernel.org>, linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>, Vinod Koul <vkoul@...nel.org>, "dmaengine@...r.kernel.org" <dmaengine@...r.kernel.org> Cc: Sumit Semwal <sumit.semwal@...aro.org>, Christian König <christian.koenig@....com>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, "linux-media@...r.kernel.org" <linux-media@...r.kernel.org>, "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>, "linaro-mm-sig@...ts.linaro.org" <linaro-mm-sig@...ts.linaro.org>, Joy Zou <joy.zou@....com>, Shawn Guo <shawnguo@...nel.org> Subject: Re: [BUG] ls1046a: eDMA does not transfer data from I2C On 9/19/22 6:40 PM, Leo Li wrote: > > >> -----Original Message----- >> From: Sean Anderson <sean.anderson@...o.com> >> Sent: Monday, September 19, 2022 5:24 PM >> To: Oleksij Rempel <linux@...pel-privat.de>; Pengutronix Kernel Team >> <kernel@...gutronix.de>; linux-i2c@...r.kernel.org; linux-arm-kernel >> <linux-arm-kernel@...ts.infradead.org>; Vinod Koul <vkoul@...nel.org>; >> dmaengine@...r.kernel.org >> Cc: Sumit Semwal <sumit.semwal@...aro.org>; Christian König >> <christian.koenig@....com>; Linux Kernel Mailing List <linux- >> kernel@...r.kernel.org>; linux-media@...r.kernel.org; dri- >> devel@...ts.freedesktop.org; linaro-mm-sig@...ts.linaro.org; Joy Zou >> <joy.zou@....com>; Peng Ma <peng.ma@....com>; Robin Gong >> <yibin.gong@....com>; Shawn Guo <shawnguo@...nel.org>; Leo Li >> <leoyang.li@....com> >> Subject: [BUG] ls1046a: eDMA does not transfer data from I2C >> >> Hi all, >> >> I discovered a bug in either imx_i2c or fsl-edma on the LS1046A where no >> data is read in i2c_imx_dma_read except for the last two bytes (which are >> not read using DMA). This is perhaps best illustrated with the following >> example: > > What is the kernel tree/tag that you are testing with? 5.15.40 Sorry, I forgot to put that in the first email. I can test with linux/master, but I reviewed the different commits and I did not think there would be any difference. I also cherry-picked the eDMA memcpy commit, but the dma test passed. --Sean
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