topic Re: imx93 DSI send command fail in some case in i.MX Processors

imx93 DSI send command fail in some case

jiangyaqiang — Wed, 06 Nov 2024 14:04:15 GMT

HI experts:

I got a problem when intergrade a mipi panel to imx93 board , the log is:

"dw-mipi-dsi-imx 4ae10000.dsi:failed to write command FIFo"

and the function "mipi_dsi_device_transfer" return with error=-110.

After more research, and found that not all commands fail, but some command with too much parameters will fail, for example: the driver send the following commands:

it will fail at command : 0xB4 , 0xD3, 0xD5 , 0xD6.

If I don't send the commands failed, the panel can show picture , but the picture position is offset, and I have confirmed the board is ok wit DSI TO HDMI, and the panel is ok with imx8mini.

Dose anyone has any suggestion ?

Best Regards .

Re: imx93 DSI send command fail in some case

Zhiming_Liu — Thu, 07 Nov 2024 02:09:23 GMT

Hello,

The DSI controller in i.MX93 is different from i.MX8MM.

Please refer Table 526. Error Cause and Recover in i.MX93 RM. For pld_w_err, the controller can send such long packet at one time.

Please check with your panel vendor to see if you can split these long cmd lists.

Best Regards

Zhiming

Re: imx93 DSI send command fail in some case

jiangyaqiang — Thu, 07 Nov 2024 11:57:20 GMT

Hi Zhiming:

Thanks.

And finally I found that add more timeout or don't send command in LPM will fix the problem.