LVDS Panel with Verdin i.MX8MP on Verdin Carrier Board

[RudolfStreif]

When I enable verdin-imx8mp_mezzanine_panel-cap-touch-10inch-lvds_overlay.dtbo in overlays.txt it also requires me to enable verdin-imx8mp_dsi-to-hdmi_overlay.dtbo otherwise the following messages are repeated endlessly and the system never boots:

[   22.785640] dwhdmi-imx 32fd8000.hdmi: Detected HDMI TX controller v2.13a with HDCP (samsung_dw_hdmi_phy2)
[   22.795617] dwhdmi-imx 32fd8000.hdmi: registered DesignWare HDMI I2C bus driver
[   22.804201] imx-drm display-subsystem: bound imx-lcdifv3-crtc.0 (ops lcdifv3_crtc_ops)
[   22.812224] imx-drm display-subsystem: bound imx-lcdifv3-crtc.1 (ops lcdifv3_crtc_ops)
[   22.823980] dwhdmi-imx 32fd8000.hdmi: Detected HDMI TX controller v2.13a with HDCP (samsung_dw_hdmi_phy2)
[   22.834142] dwhdmi-imx 32fd8000.hdmi: registered DesignWare HDMI I2C bus driver
[   22.842708] imx-drm display-subsystem: bound imx-lcdifv3-crtc.0 (ops lcdifv3_crtc_ops)
[   22.850708] imx-drm display-subsystem: bound imx-lcdifv3-crtc.1 (ops lcdifv3_crtc_ops)

Why would this be the case?

[ImHei]

Hello @RudolfStreif,
I think it’s the same issue like this:

Verdin IMX8MP: Use native LVDS and HDMI Interface

Hello @ImHei After a more detailed analysis I realized that the problem also occurs with the Verdin development board. I didn’t see it before because I had enabled the DSI to HDMI overlay verdin-imx8mp_dsi-to-hdmi_overlay.dtbo ( although it was not needed). Can you enable this overlay and see if this solves your issue? Although this isn’t an elegant solution, it can be a temporary workaround while we figure out the root cause of this behavior. Best regards, Josep

I don’t know if there is a proper solution yet.

[RudolfStreif]

Hi @ImHei,
Thank you for the confirmation. Yes, I had the verdin-imx8mp_dsi-to-hdmi_overlay.dtbo enabled and the system boots. I just wanted to know if that is known issue.
Thank you for your support.

[eric.tx]

@RudolfStreif,

Hello! And yes, this is a reproducible event that our teams knows about. If the suggested work-around works for you, perfect! If not, our team should have an understanding as we learn more.

-Eric

[RudolfStreif]

Thank you. Yes, having the other overlay as a work-around is fine.