[PATCH V4 0/1] drm/amdgpu: Disable PCIE_DPM on Intel RKL Platform

[Koba Ko]

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(-)

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2.25.1