Seamless boot allows keeping the content on the framebuffer from pre-boot so the screen doesn't get "painted black" during boot process. Ideally the flow looks like: * UEFI F/W posts vendor logo * GRUB doesn't show anything, but silently continues * Plymouth starts and adds OS logo to bottom and spinner * Simple DRM loads, no mode changes * amdgpu loads, no mode changes * Spinner keeps spinning * GDM starts up Previously this was only enabled on Van Gogh, but this series enables the functionality more widely onto APUs that support IP discovery. This also introduces a kernel module parameter that to easily force it enabled on other ASICs too, which may be useful to adjust policy. Mario Limonciello (4): drm/amd: Drop special case for yellow carp without discovery drm/amd: Move seamless boot check out of display drm/amd: Add a module parameter for seamless boot drm/amd: Enable seamless boot by default on newer APUs drivers/gpu/drm/amd/amdgpu/amdgpu.h | 2 ++ drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 31 +++++++++++++++++++ drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 8 +++++ drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c | 6 ---- .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 23 +------------- .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h | 2 -- 6 files changed, 42 insertions(+), 30 deletions(-) -- 2.34.1
