topic Audio over HDMI Creates a Kernel Panic When Audio Stops in i.MX Processors

Audio over HDMI Creates a Kernel Panic When Audio Stops

maxkrummenacher — Wed, 17 Dec 2025 10:28:01 GMT

On an i.MX 8QM system the kernel panics after audio was played over HDMI.

The kernel version is based on lf-6.12.20-2.0.0. It looks like the issue is still present in lf-6.12.49-2.2.0.

Looks like commit c91c717f7113 ("LF-13883: drm: bridge: mhdp: Add info frame remove function") introduced a regression as it does not use the register access helper cdns_mhdp_bus_write() and thus for i.MX 8QM does not write registers in they way they should be written.

The attached patch fixed the issue for me.

Regards

Max

Re: Audio over HDMI Creates a Kernel Panic When Audio Stops

Zhiming_Liu — Thu, 18 Dec 2025 08:16:30 GMT

Hi @maxkrummenacher

Reported it, wait for internal reply.

Best Regards,
Zhiming

Re: Audio over HDMI Creates a Kernel Panic When Audio Stops

Zhiming_Liu — Fri, 06 Mar 2026 01:06:20 GMT

Hi @maxkrummenacher

The Q2 BSP is expected to resolve this issue.

Best Regards,
Zhiming