[PATCH v2 0/4] Add a drm_crtc_helper_atomic_check() helper

[Javier Martinez Canillas <javierm@redhat.com>]

Add a helper function and make drivers that have the same logic in their
struct drm_crtc_helper_funcs .atomic_check handler to use this instead.

Patch #1, #2 and #3 are just cleanups for the mgag200, simpledrm and
ssd130x drivers respectively. Finally patch #4 converts the last two
drivers to use a helper instead of open coding it the same logic.

The changes are inspired by a patch from Thomas Zimmermann for the ast
DRM driver:

https://patchwork.kernel.org/project/dri-devel/patch/20221010103625.19958-4-tzimmermann@suse.de/

This is a v2 that addresses issues pointed out also by Thomas in v1:

https://lists.freedesktop.org/archives/dri-devel/2022-October/375363.html

Best regards,
Javier

Changes in v2:
- Reference drm_plane_helper_atomic_check() from drm_crtc_atomic_check()
  kernel doc comments and viceversa (Thomas Zimmermann).

Javier Martinez Canillas (4):
  drm/mgag200: Do not call drm_atomic_add_affected_planes()
  drm/simpledrm: Do not call drm_atomic_add_affected_planes()
  drm/ssd130x: Do not call drm_atomic_add_affected_planes()
  drm/crtc-helper: Add a drm_crtc_helper_atomic_check() helper

 drivers/gpu/drm/drm_crtc_helper.c      | 26 ++++++++++++++++++++++++++
 drivers/gpu/drm/drm_plane_helper.c     |  4 +++-
 drivers/gpu/drm/mgag200/mgag200_mode.c |  2 +-
 drivers/gpu/drm/solomon/ssd130x.c      | 20 ++------------------
 drivers/gpu/drm/tiny/simpledrm.c       | 20 ++------------------
 include/drm/drm_crtc_helper.h          |  2 ++
 6 files changed, 36 insertions(+), 38 deletions(-)

-- 
2.37.3