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. 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? Anyway, if this is just a modparam and disabled by default I don't see any issue really at all. -Daniel > > Alex > > On Thu, Aug 4, 2016 at 3:04 AM, Emily Deng <Emily.Deng at 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 (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 > > > > -- > > 1.9.1 > > > > _______________________________________________ > > amd-gfx mailing list > > amd-gfx at lists.freedesktop.org > > https://lists.freedesktop.org/mailman/listinfo/amd-gfx > _______________________________________________ > dri-devel mailing list > dri-devel at lists.freedesktop.org > https://lists.freedesktop.org/mailman/listinfo/dri-devel -- Daniel Vetter Software Engineer, Intel Corporation http://blog.ffwll.ch
