Re: [PATCH 1/1] drm/amdgpu: Fix TLB flush failures after hibernation resume

["Ionut Nechita (Sunlight Linux)" <sunlightlinux@gmail.com>]

From: Ionut Nechita <sunlightlinux@gmail.com>

On Thu, Jan 8 2026 at 13:36, Christian König wrote:

> Question is why the KIQ is not up and running before we do anything with it?

Thank you for the feedback. I completely understand that my patch is
just a workaround and not proper engineering - you're absolutely right
that the real issue is KIQ being marked as ready before it's actually
functional.

I don't have experience with GPU drivers and video subsystems, so I'm
not familiar with the proper initialization sequence for KIQ. I'd prefer
not to keep a workaround for this issue in my tree.

Is there a proper fix available, or could you point me in the right
direction? I'm happy to test any patches on my AMD Cezanne (Renoir)
hardware where I can reliably reproduce the issue after hibernation.

Also, regarding hibernation support: you mentioned that hibernation is
not generally supported with the driver. Should I expect other issues
beyond this TLB flush problem, or is this the main blocker?

Thanks for your time,
Ionut