On Thu, Aug 4, 2016 at 12:24 PM, Daniel Vetter daniel@ffwll.ch wrote:
On Thu, Aug 04, 2016 at 10:59:38AM -0400, Alex Deucher wrote:
Adding dri-devel.
This patch set basically adds a driver option to enable virtual display hw if the user needs it (e.g., virtualization environments, headless cards, pre-silicon environments, etc.). It looks like a regular KMS crtc/encoder/connector and works with existing userspace unchanged.
We autodetect this already for virtualized envirnments and pre-silicon.
What do you mean? What do you do in those cases?
Not so sure about headless cards, on those we don't bother to expose anything if there's nothing connected (i.e. no crtc/encoder/plane or connector objects at all). Why do you want fake outputs in that case?
We have some customers that want to run X or other desktops on hardware without display connectors or even chips without display hw at all.
Anyway, if this is just a modparam and disabled by default I don't see any issue really at all.
Yes, this is controlled by a module option and is intended to only be enabled by the user for specific use cases.
Alex
-Daniel
Alex
On Thu, Aug 4, 2016 at 3:04 AM, Emily Deng Emily.Deng@amd.com wrote:
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 (don’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
-- 1.9.1
amd-gfx mailing list amd-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/amd-gfx
dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel
-- Daniel Vetter Software Engineer, Intel Corporation http://blog.ffwll.ch