Ryzen 1600X with mem_encrypt=on

[Sami Farin]

Is it supposed to work?  Now if I use that option, monitor powers off
(no signal) when it's initializing amdgpu and I have to reset the computer.
Instead of crashing, could it not just give an error or something?

I have Asrock X370 Taichi and Sapphire RX550.
With mem_encrypt=off it works OK:

[    8.012120] [drm] initializing kernel modesetting (POLARIS12 0x1002:0x699F 0x1DA2:0xE367 0xC7).
[    8.012199] [drm] register mmio base: 0xFE900000
[    8.012258] [drm] register mmio size: 262144
[    8.012321] amdgpu: amdgpu 0000:2d:00.0: kfd not supported on this ASIC
[    8.012325] [drm] probing gen 2 caps for device 1022:1453 = 737903/e
[    8.012389] [drm] probing mlw for device 1022:1453 = 737903
[    8.012464] [drm] UVD is enabled in VM mode
[    8.012522] [drm] UVD ENC is enabled in VM mode
[    8.012581] [drm] VCE enabled in VM mode
[    8.012888] amdgpu 0000:2d:00.0: Invalid PCI ROM header signature: expecting 0xaa55, got 0xffff
[    8.012977] ATOM BIOS: 113-3676M-UO1
[    8.013073] [drm] vm size is 64 GB, 2 levels, block size is 10-bit, fragment size is 9-bit
[    8.013147] amdgpu 0000:2d:00.0: using built-in amdgpu/polaris12_mc.bin
[    8.013154] amdgpu 0000:2d:00.0: VRAM: 4096M 0x000000F400000000 - 0x000000F4FFFFFFFF (4096M used)
[    8.013228] amdgpu 0000:2d:00.0: GTT: 256M 0x0000000000000000 - 0x000000000FFFFFFF
[    8.013300] [drm] Detected VRAM RAM=4096M, BAR=256M
[    8.013360] [drm] RAM width 128bits GDDR5
[    8.013486] [TTM] Zone  kernel: Available graphics memory: 16455818 kiB
[    8.013551] [TTM] Zone   dma32: Available graphics memory: 2097152 kiB
[    8.013615] [TTM] Initializing pool allocator
[    8.013676] [TTM] Initializing DMA pool allocator
[    8.013799] [drm] amdgpu: 4096M of VRAM memory ready
[    8.013859] [drm] amdgpu: 4096M of GTT memory ready.
[    8.013928] [drm] GART: num cpu pages 65536, num gpu pages 65536
[    8.014074] [drm] PCIE GART of 256M enabled (table at 0x000000F400040000).
[    8.014186] amdgpu: amdgpu 0000:2d:00.0: amdgpu: using MSI.
[    8.014230] amdgpu: amdgpu: [powerplay] amdgpu: powerplay sw initialized

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