Hi,
A regression [1] was reported on suspend for AMD Stoney on 6.3.10. It bisected down to:
1ca399f127e0 ("drm/amd/display: Add wrapper to call planes and stream update")
This was requested by me to fix a PSR problem [2], which isn't used on Stoney.
This was also backported into 6.1.36 (as e538342002cb) and 5.15.119 (as 3c1aa91b37f9).
It's fixed on 6.3.y by cherry-picking:
32953485c558 ("drm/amd/display: Do not update DRR while BW optimizations pending")
It's fixed in 6.1.y by cherry-picking:
3442f4e0e555 ("drm/amd/display: Remove optimization for VRR updates") 32953485c558 ("drm/amd/display: Do not update DRR while BW optimizations pending")
On 5.15.y it's not a reasonable backport to take the fix to stable because there is a lot of missing Freesync code. Instead it's better to revert the patch series that introduced it to 5.15.y because PSR-SU isn't even introduced until later kernels anyway.
5a24be76af79 ("drm/amd/display: fix the system hang while disable PSR") 3c1aa91b37f9 ("drm/amd/display: Add wrapper to call planes and stream update") eea850c025b5 ("drm/amd/display: Use dc_update_planes_and_stream") 97ca308925a5 ("drm/amd/display: Add minimal pipe split transition state")
[1] https://gitlab.freedesktop.org/drm/amd/-/issues/2670 [2] https://lore.kernel.org/stable/e2ae2999-2e39-31ad-198a-26ab3ae53ae7@amd.com/
Thanks,