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

[Leo Li]

> -----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?

Regards,
Leo