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

[Sean Anderson]

On 9/19/22 6:40 PM, Leo Li wrote:
> 
> 
>> -----Original Message-----
>> From: Sean Anderson <sean.anderson@xxxxxxxx>
>> Sent: Monday, September 19, 2022 5:24 PM
>> To: Oleksij Rempel <linux@xxxxxxxxxxxxxxxx>; Pengutronix Kernel Team
>> <kernel@xxxxxxxxxxxxxx>; linux-i2c@xxxxxxxxxxxxxxx; linux-arm-kernel
>> <linux-arm-kernel@xxxxxxxxxxxxxxxxxxx>; Vinod Koul <vkoul@xxxxxxxxxx>;
>> dmaengine@xxxxxxxxxxxxxxx
>> Cc: Sumit Semwal <sumit.semwal@xxxxxxxxxx>; Christian König
>> <christian.koenig@xxxxxxx>; Linux Kernel Mailing List <linux-
>> kernel@xxxxxxxxxxxxxxx>; linux-media@xxxxxxxxxxxxxxx; dri-
>> devel@xxxxxxxxxxxxxxxxxxxxx; linaro-mm-sig@xxxxxxxxxxxxxxxx; Joy Zou
>> <joy.zou@xxxxxxx>; Peng Ma <peng.ma@xxxxxxx>; Robin Gong
>> <yibin.gong@xxxxxxx>; Shawn Guo <shawnguo@xxxxxxxxxx>; Leo Li
>> <leoyang.li@xxxxxxx>
>> 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