[PATCH 00/11] Provide offset-adjusted framebuffer mappings

[Thomas Zimmermann]

A framebuffer's offsets field might be non-zero to make the BO data
start at the specified offset within the BO's memory. Handle this
case in drm_gem_fb_vmap() and update all callers. So far, many drivers
ignore the offsets, which can lead to visual artifacts.

Patch 1 adds an optional argument to drm_gem_fb_vmap() to return the
offset-adjusted data address for use with shadow-buffered planes.

Patches 3 and 11 convert gud and vkms, which are the other callers of
drm_gem_fb_vmap(). For gud, it's just a cleanup. Vkms will handle the
framebuffer offsets correctly for its input and output framebuffers.

The other patches convert users of shadow-buffered planes to use the
data address. After conversion, each driver will use the correct data
for non-zero offsets.

Thomas Zimmermann (11):
  drm/gem: Provide offset-adjusted framebuffer BO mappings
  drm/ast: Use offset-adjusted shadow-plane mappings
  drm/gud: Get offset-adjusted mapping from drm_gem_fb_vmap()
  drm/hyperv: Use offset-adjusted shadow-plane mappings
  drm/mgag200: Use offset-adjusted shadow-plane mappings
  drm/cirrus: Use offset-adjusted shadow-plane mappings
  drm/gm12u320: Use offset-adjusted shadow-plane mappings
  drm/simpledrm: Use offset-adjusted shadow-plane mapping
  drm/udl: Use offset-adjusted shadow-plane mapping
  drm/vbox: Use offset-adjusted shadow-plane mappings
  drm/vkms: Use offset-adjusted shadow-plane mappings and output

 drivers/gpu/drm/ast/ast_mode.c               |  2 +-
 drivers/gpu/drm/drm_gem_atomic_helper.c      |  2 +-
 drivers/gpu/drm/drm_gem_framebuffer_helper.c | 17 ++++++++++++++++-
 drivers/gpu/drm/gud/gud_pipe.c               |  5 +++--
 drivers/gpu/drm/hyperv/hyperv_drm_modeset.c  |  4 ++--
 drivers/gpu/drm/mgag200/mgag200_mode.c       |  4 ++--
 drivers/gpu/drm/tiny/cirrus.c                |  4 ++--
 drivers/gpu/drm/tiny/gm12u320.c              |  4 ++--
 drivers/gpu/drm/tiny/simpledrm.c             |  4 ++--
 drivers/gpu/drm/udl/udl_modeset.c            |  4 ++--
 drivers/gpu/drm/vboxvideo/vbox_mode.c        |  2 +-
 drivers/gpu/drm/vkms/vkms_composer.c         |  2 +-
 drivers/gpu/drm/vkms/vkms_drv.h              |  1 +
 drivers/gpu/drm/vkms/vkms_plane.c            |  2 +-
 drivers/gpu/drm/vkms/vkms_writeback.c        |  2 +-
 include/drm/drm_gem_atomic_helper.h          |  8 ++++++++
 include/drm/drm_gem_framebuffer_helper.h     |  3 ++-
 17 files changed, 48 insertions(+), 22 deletions(-)

--
2.32.0