topic Re: I/O Error in DMA TX While transferring data using spi protocol in i.MX Processors

I/O Error in DMA TX While transferring data using spi protocol

surajeet_roy — Sun, 17 Jan 2021 15:28:19 GMT

Hi Team,

While transferring data using spi protocol to a controller, I am receiving IMX8MN: .

I see that I only receive this error when I am transferring more than 32 bytes of data.
I get the below error:

[ 160.677358] spi_imx 30840000.spi: I/O Error in DMA TX

[ 160.682553] spidev spi2.0: SPI transfer failed: -110

[ 160.687651] spi_master spi2: failed to transfer one message from queue

DISTRO = "fsl-imx-wayland"
DISTRO_VERSION = "5.4-zeus"

&ecspi3 {
#address-cells = <1>;
#size-cells = <0>;
fsl,spi-num-chipselects = <1>;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_ecspi3 &pinctrl_ecspi3_cs>;
cs-gpios = <&gpio5 25 GPIO_ACTIVE_LOW>;
status = "okay";

spidev0: spi@0 {
reg = <0>;
compatible = "rohm,dh2228fv";
spi-max-frequency = <500000>;
};
};

Any suggestion will be appreciated.
Thank you

Re: I/O Error in DMA TX While transferring data using spi protocol

igorpadykov — Mon, 18 Jan 2021 00:01:10 GMT

Hi surajeet_roy

one can check below commit

https://source.codeaurora.org/external/imx/linux-imx/commit/?h=imx_5.4.70_2.3.0&id=c18cc22344c003ad9b277c372b31bdb76262b669

Best regards
igor

Re: I/O Error in DMA TX While transferring data using spi protocol

surajeet_roy — Wed, 21 Apr 2021 08:48:10 GMT

Hi Team,

After making the changes the DMA error is fixed and I am able to transfer data more then 32 byte.

However, I am not able to send data more then 128 byte
Currently I am getting this error.

*** stack smashing detected ***: <u[ 148.933976] audit: type=1701 audit(1617713810.284:4): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=526 comm="CCUServer" exe="/CCUServer" sig=6 res=1
nknown> terminated

Can this be fixed by making some other adjustments in sdma file?

Please suggest

Thank you!

Re: I/O Error in DMA TX While transferring data using spi protocol

surajeet_roy — Fri, 30 Apr 2021 06:40:58 GMT

Hi Team, Thank you for the solution . It is working !

Re: I/O Error in DMA TX While transferring data using spi protocol

jpsk — Thu, 02 May 2024 22:28:15 GMT

Hi,

Can you please provide the updated link for the solution below now that the source code is migrated to GitHub?

Thanks,