Instead of faking VBLANK events by themselves, drivers without VBLANK
support can enable drm_crtc_vblank.no_vblank and let DRM do the rest.
The patchset makes this official and converts over several drivers.
Ast already uses the functionality and just needs a cleanup. Cirrus can
be converted easily by setting the field in the check() callback and
removing the existing VBLANK code. For most other simple-KMS drivers
without enable_vblank() and check(), simple-KMS helpers can enable the
faked VBLANK by default. The only exception is Xen, which comes with
its own VBLANK logic and should rather to disable no_vblank.
v2:
* document functionality (Daniel)
* cleanup ast (Daniel)
* let simple-kms handle no_vblank where possible
Thomas Zimmermann (4):
drm: Document struct drm_crtc_state.no_vblank for faking VBLANK events
drm/ast: Set struct drm_crtc_state.no_vblank in atomic_check()
drm/cirrus: Let DRM core send VBLANK events
drm/simple-kms: Let DRM core send VBLANK events by default
drivers/gpu/drm/ast/ast_mode.c | 4 ++--
drivers/gpu/drm/bochs/bochs_kms.c | 9 ---------
drivers/gpu/drm/cirrus/cirrus.c | 10 ++--------
drivers/gpu/drm/drm_atomic_helper.c | 4 +++-
drivers/gpu/drm/drm_mipi_dbi.c | 9 ---------
drivers/gpu/drm/drm_simple_kms_helper.c | 19 +++++++++++++++----
drivers/gpu/drm/tiny/gm12u320.c | 9 ---------
drivers/gpu/drm/tiny/ili9225.c | 9 ---------
drivers/gpu/drm/tiny/repaper.c | 9 ---------
drivers/gpu/drm/tiny/st7586.c | 9 ---------
drivers/gpu/drm/udl/udl_modeset.c | 11 -----------
drivers/gpu/drm/xen/xen_drm_front_kms.c | 13 +++++++++++++
include/drm/drm_crtc.h | 9 +++++++--
include/drm/drm_simple_kms_helper.h | 7 +++++--
14 files changed, 47 insertions(+), 84 deletions(-)
--
2.24.1
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