And also
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c?h=linux-5.15.y&id=f02abeb0779700c308e661a412451b38962b8a0b
Maybe if the function is called during resume() without being called
during init(), bad things happen???
Cheers
On 10/11/2021 23:02, Mark Boddington wrote:
I think I've found the problem.
The amdgpu_amdkfd_resume_iommu(adev) call has been moved around a few
times recently, but in 5.15.1 it's been removed completely.
I think reverting this patch fixes the issue:
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c?h=linux-5.15.y&id=f17dca0ab3f38b19c0f1b935f417f62d4a528723
See also:
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c?h=linux-5.15.y&id=714d9e4574d54596973ee3b0624ee4a16264d700
Cheers,
Mark
On 10/11/2021 17:38, Greg KH wrote:
On Wed, Nov 10, 2021 at 04:27:39PM +0000, Mark Boddington wrote:
Hi all,
I run the mainline Linux kernel on Ubuntu 20.04, built from
https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.15.1/
There appears to be a regression in 5.15.1 which causes the GPU to
fail to
resume after power saving.
Could it be this change??:
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c?h=v5.15.1&id=8af3a335b5531ca3df0920b1cca43e456cd110ad
If you revert it, does it solve the problem for you?
If not, what kernel version did work for you with this hardware?
thanks,
greg k-h
