[I.MX8MQ-EVK] What is BIT_HRESP_ERR_INT register?

[dokim]

Hi.

The following error occurred when I tried to stream video from two cameras(720p@60fps) with gstreamer.

"mx6s-csi 30a90000.csi1_bridge: mx6s_csi_irq_handler Hresponse error detected"
(BSP : 4.9.51_imx8m_ga)

And the frequency of occurrences is 1-2 in five on average.

For this error, I had checked the file that 'drivers/media/platform/mxc/capture/mx6s_capture.c', and I got It occurs when the bit BIT_HRESP_ERR_INT is on.

So, I want to know the meaning of this error and the information of CSI_CSISR register or the solution for this error.
(I couldn't found the meaning of this error and information of CSI_CSISR in any manual for i.mx8.)

Thanks!

[igorpadykov · Accepted solution]

Hi dokim

HRESP_ERR_INT - AHB Bus Response Error Interrupt:
AHB Bus response error interrupt is generated when a bus error is detected.

similar to i.MX7D CSI_CSISR register described in sect.13.3.7.7 CSI Status Register (CSI_CSISR)

Reference Manual.

Best regards
igor
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[dokim]

Thank you for your answer.

May I know the related files with this problem on kernel source?

Thanks!

[igorpadykov]

one can check Linux Manual with description of drivers:

https://www.nxp.com/webapp/Download?colCode=L4.9.88_2.0.0_LINUX_DOCS 

Best regards
igor