Re: [BUG] ls1046a: eDMA does not transfer data from I2C

Sean Anderson
2022-09-19T22:45:27Z

On 9/19/22 6:40 PM, Leo Li wrote:
>
>
>> -----Original Message-----
>> From: Sean Anderson <sean.anderson@seco.com>
>> Sent: Monday, September 19, 2022 5:24 PM
>> To: Oleksij Rempel <linux@rempel-privat.de>; Pengutronix Kernel Team
>> <kernel@pengutronix.de>; linux-i2c@vger.kernel.org; linux-arm-kernel
>> <linux-arm-kernel@lists.infradead.org>; Vinod Koul <vkoul@kernel.org>;
>> dmaengine@vger.kernel.org
>> Cc: Sumit Semwal <sumit.semwal@linaro.org>; Christian König
>> <christian.koenig@amd.com>; Linux Kernel Mailing List <linux-
>> kernel@vger.kernel.org>; linux-media@vger.kernel.org; dri-
>> devel@lists.freedesktop.org; linaro-mm-sig@lists.linaro.org; Joy Zou
>> <joy.zou@nxp.com>; Peng Ma <peng.ma@nxp.com>; Robin Gong
>> <yibin.gong@nxp.com>; Shawn Guo <shawnguo@kernel.org>; Leo Li
>> <leoyang.li@nxp.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