The Virtual Display feature is to fake a display engine in amdgpu kernel driver, which allows any other kernel modules or user mode components to work as expected even without real display HW. User can get the desktop/primary surface through remote desktop tools instead of displaying HW associated with the GPU.
The virtual display feature is designed for following cases:
1)Headless GPU, which has no display engine, while for some reason the X server is required to initialize in this GPU;
2)GPU with head (display engine) but Video BIOS disables display capability for some reason. For example, SR-IOV virtualization enabled Video BIOS often disables display connector. Some S-series Pro-Graphics designed for headless computer also disable display capability in Video BIOS;
3)For whatever reason, end user wants to enable a virtual display (donâ??t need HW display capability).
Emily Deng (13):
drm/amdgpu: Add virtual connector and encoder macros.
drm/amdgpu: Initialize dce_virtual_ip_funcs
drm/amdgpu: Initialize dce_virtual_display_funcs.
drm/amdgpu: Initialize crtc, pageflip irq funcs
drm/amdgpu: Initialize dce_virtual_crtc_helper_funcs
drm/amdgpu: Initialize dce_virtual_crtc_funcs.
drm/amdgpu: Disable VGA render and crtc when init GMC.
drm/amdgpu: Use software timer to generate vsync interrupt.
drm/amdgpu: Call pageflip irq funtion when receiced vsync interrupt.
drm/amdgpu: Add DRM_MODE_CONNECTOR_VIRTUAL connector in
amdgpu_connector_add.
drm/amdgpu: Define vitual display ip blocks.
drm/amdgpu: Define one variable for virtual display.
drm/amdgpu: Set ip_blocks according variable amdgpu_virtual_display.
drivers/gpu/drm/amd/amdgpu/Makefile | 3 +-
drivers/gpu/drm/amd/amdgpu/ObjectID.h | 7 +
drivers/gpu/drm/amd/amdgpu/amdgpu.h | 3 +
drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c | 27 +
drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.h | 2 +
drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c | 95 +++
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 5 +
drivers/gpu/drm/amd/amdgpu/amdgpu_display.c | 5 +-
drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 4 +
drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h | 9 +-
drivers/gpu/drm/amd/amdgpu/cik.c | 445 +++++++++++--
drivers/gpu/drm/amd/amdgpu/dce_v10_0.c | 75 +++
drivers/gpu/drm/amd/amdgpu/dce_v10_0.h | 2 +
drivers/gpu/drm/amd/amdgpu/dce_v11_0.c | 83 +++
drivers/gpu/drm/amd/amdgpu/dce_v11_0.h | 2 +
drivers/gpu/drm/amd/amdgpu/dce_v8_0.c | 82 +++
drivers/gpu/drm/amd/amdgpu/dce_v8_0.h | 2 +
drivers/gpu/drm/amd/amdgpu/dce_virtual.c | 855 +++++++++++++++++++++++++
drivers/gpu/drm/amd/amdgpu/dce_virtual.h | 31 +
drivers/gpu/drm/amd/amdgpu/vi.c | 416 ++++++++++--
20 files changed, 2062 insertions(+), 91 deletions(-)
create mode 100644 drivers/gpu/drm/amd/amdgpu/dce_virtual.c
create mode 100644 drivers/gpu/drm/amd/amdgpu/dce_virtual.h
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1.9.1
