imx8qm M4 core1 use MIPI-DSI can't deinit successfully

[jinchen1227]

I use the imx8qm M4 core1 to display on MIPI-DSI 1, and it is successfully displayed.

But after android start, the M4 core will deinit the display, but the adv7511 can't start in android.

I check the M4 code(My code based on rear view camera demo code), the APP_DeinitDisplay is all executed in mipi path, but the Android kernel can't attach adv7511 after M4 deinit.

The log shows adv7511 probe failed.

[igorpadykov]

Hi Chen

what android release used in the case. One can try latest

Android Q10.0.0_1.1.0_Auto Documentation

and use sect.8.1 Camera configuration attached Android Guide..

Best regards
igor
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[jinchen1227]

Thank you for your answer!

But the issue is MIPI-DSI for display, I use dpu2&mipi-dsi1 to display a picture on M4 core1,

and after android start, the android can't start adv7511 successfully.

What I find is that if I deinit MIPI-DSI early before Android start, android can display on MIPI success.

The adv7511 deinit need delay some time? 

The adv7511 kernel driver returned EAGAIN at adv7511_probe when run to:

ret = regmap_read(adv7511->regmap, ADV7511_REG_CHIP_REVISION, &val);

The kernel version is 4.14.98.