[v2,00/11] drm: Introduce DRM client library

Message

Thomas Zimmermann Oct. 2, 2024, 1:04 p.m. UTC

With the next DRM client coming soon (drm_log) and most of DRM's
fbdev emulation consolidated in a few places, it's time to provide
a single place for the clients.

The new module drm_client_lib.ko stores most of the in-kernel client
code. It is designed such that drivers can opt into client support,
but the presence of the client module depends on the user's kernel
configuration. Without selected clients, no client module will be
build.

Version 2 of this patchset is a significant rework of the patches,
so there are no R-bs kept. The base client code and client event
handling remains in the DRM core. This simplifies module dependencies.
But suspend and resume are now handled in client helpers instead of
direct calls to fbdev emulation. This breaks a cyclic dependency
among the involved modules. It also allows any client to process
suspend and resume events.

v2:
- rework of the overall design
- keep base client code in DRM core.

Thomas Zimmermann (11):
  drm/i915: Select DRM_CLIENT_SELECTION
  drm/xe: Select DRM_CLIENT_SELECTION
  drm/fbdev: Select fbdev I/O helpers from modules that require them
  drm/fbdev: Store fbdev module parameters in separate file
  drm/client: Move client event handlers to drm_client_event.c
  drm/client: Move suspend/resume into DRM client callbacks
  drm/amdgpu: Suspend and resume internal clients with client helpers
  drm/nouveau: Suspend and resume clients with client helpers
  drm/radeon: Suspend and resume clients with client helpers
  drm/client: Make client support optional
  drm/client: Add client-lib module

 Documentation/gpu/drm-client.rst              |   3 +
 drivers/gpu/drm/Kconfig                       |  39 +++-
 drivers/gpu/drm/Makefile                      |  20 +-
 drivers/gpu/drm/amd/amdgpu/Kconfig            |   1 +
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c    |  22 +-
 drivers/gpu/drm/drm_client.c                  | 121 -----------
 drivers/gpu/drm/drm_client_event.c            | 195 ++++++++++++++++++
 drivers/gpu/drm/drm_client_setup.c            |   3 +
 drivers/gpu/drm/drm_drv.c                     |   2 +-
 drivers/gpu/drm/drm_fb_helper.c               |  31 ---
 drivers/gpu/drm/drm_fbdev_client.c            |  30 ++-
 drivers/gpu/drm/drm_file.c                    |   2 +-
 drivers/gpu/drm/drm_internal.h                |   7 +
 drivers/gpu/drm/drm_kms_helper_common.c       |  38 ++++
 drivers/gpu/drm/drm_modeset_helper.c          |  14 +-
 drivers/gpu/drm/drm_probe_helper.c            |   2 +-
 drivers/gpu/drm/i915/Kconfig                  |   1 +
 .../drm/i915/display/intel_display_driver.c   |   2 +-
 drivers/gpu/drm/nouveau/nouveau_display.c     |   8 +-
 drivers/gpu/drm/nouveau/nouveau_vga.c         |   2 +-
 drivers/gpu/drm/radeon/radeon_device.c        |  19 +-
 drivers/gpu/drm/radeon/radeon_fbdev.c         |   6 -
 drivers/gpu/drm/radeon/radeon_mode.h          |   3 -
 drivers/gpu/drm/xe/Kconfig                    |   1 +
 include/drm/drm_client.h                      |  39 +++-
 include/drm/drm_client_event.h                |  27 +++
 26 files changed, 423 insertions(+), 215 deletions(-)
 create mode 100644 drivers/gpu/drm/drm_client_event.c
 create mode 100644 include/drm/drm_client_event.h