[SRU] [D/E] [PATCH 0/1] Fix S3 screen freeze on AMD Stoney Ridge

[Kai-Heng Feng]

BugLink: https://bugs.launchpad.net/bugs/1833617

[Impact]
Screen freeze after S3 on AMD Stoney Ridge.

[Fix]
Pin the VRAM so it won't contain garbage data after S3.

[Test]
After applying this patch I can confirm the issue is gone on Dell
Inspiron 3180, a Stoney Ridge laptop.

[Regression Potential]
Low. This patch only touched a small subset of amdgpu.

Likun Gao (1):
  drm/amdgpu: pin the csb buffer on hw init for gfx v8

 drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c | 40 +++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)

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2.17.1