STM32MP157 SII9022 I2C always busy

[Mokail]

I used the i2c4 for sii9022 chip,but it always busy and don't response for hdmi plug in.

[PatrickF]

I2C bus busy is usually a bus stuck to 0V, e.g. wrong Hw connection or missing power supplies on one of the I2C slave device on the bus (devices are not always "fail-safe" on their I2C pins)

[Mokail]

No, it actually works, only to detect the bus reusable by I2C4 will time out

and my i2c4 dts and sch,can you help me,i spend three days but no result...:loudly_crying_face: :loudly_crying_face: :loudly_crying_face:

[Mokail]

and i don't know the 9022 chip always busy,disabled the hdmi always ok.

[PatrickF]

From HW point if view, I just see that CI2CA pull-down should be 4.7k whereas you have 10k. Not sure it will be the issue, but deserve to align with Si9022 datasheet value.

For SW or DT settings, I cannot help much.

[Mokail]

My dts is ok?

[Yli.8]

hi：

• ​How did you solve the problem of sii9022