Due to high latency in PCIE clock switching on RKL platforms, switching the PCIE clock dynamically at runtime can lead to HDMI/DP audio problems. On newer asics this is handled in the SMU firmware. For SMU7-based asics, disable PCIE clock switching to avoid the issue. AMD provide a parameter to disable PICE_DPM. modprobe amdgpu ppfeaturemask=0xfff7bffb It's better to contorl PCIE_DPM in amd gpu driver, switch PCI_DPM by determining intel RKL platform for SMU7-based asics. V4: Modify the patch comments. V3: 1. Use IS_ENABLED() 2. include conditionally for X86_64 V2: Determine RKL by using intel core type&model. Koba Ko (1): drm/amdgpu: Disable PCIE_DPM on Intel RKL Platform .../gpu/drm/amd/pm/powerplay/hwmgr/smu7_hwmgr.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) -- 2.25.1
