[PATCH v2 0/4] Enable seamless boot more widely

Mario Limonciello mario.limonciello at amd.com
Wed Sep 13 17:14:51 UTC 2023

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 DCN3.0+.

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 ASICs

 drivers/gpu/drm/amd/amdgpu/amdgpu.h           |  2 ++
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c    | 28 +++++++++++++++++++
 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, 39 insertions(+), 30 deletions(-)


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