Currently when using DC on DCE 6, it produces a page flip timeout after a suspend/resume.
After some investigation, it turns out that the issue is because DC uses different interrupts between DCE 6 and newer HW versions, and it assumes that the VUPDATE interrupt is always present, when in fact it's not. It also assumes that the HW is capable of VRR when a VRR capable monitor is plugged in, when in fact this is not the case. This series marks VRR as unsupported on DCE 6 even when a VRR capable monitor is plugged in. Furthermore, it fixes the code trying to access the unregistered VUPDATE interrupt. As a side note, I also attempted to actually use the same interrupts as newer DCE versions, but this didn't work. Apparently DCE 6 was not advertised with VRR support anyway. Finally, there is also a patch to disable fast boot mode on DCE 6. The rationale is that this already didn't work on DCE 8, and even if it did I have no means to test it. Timur Kristóf (3): drm/amd/display: Disable fastboot on DCE 6 too. drm/amd/display: Disable VRR on DCE 6 drm/amd/display: Don't use non-registered VUPDATE on DCE 6 .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 26 ++++++++++++------- .../amd/display/amdgpu_dm/amdgpu_dm_crtc.c | 16 +++++++----- drivers/gpu/drm/amd/display/dc/dc_helper.c | 5 ++++ drivers/gpu/drm/amd/display/dc/dm_services.h | 2 ++ .../amd/display/dc/hwss/dce110/dce110_hwseq.c | 6 ++--- 5 files changed, 35 insertions(+), 20 deletions(-) -- 2.50.1
