Add the new helpers drm_gem_fb_vmap() and drm_gem_fb_vunmap(), which
provide vmap/vunmap for all BOs of a framebuffer. Convert shadow-
plane helpers, gud and vkms.
Callers of GEM vmap and vunmap functions used to do the minumum work
or get some detail wrong. Therefore shadow-plane helpers were intro-
duced to implement the details for all callers. The vmapping code in
the shadow-plane helpers is also useful for gud and vkms. So it makes
sense to provide rsp helpers. Simply call drm_gem_fb_vmap() to
retrieve mappings of all of a framebuffer's BOs.
Future work: besides the mapping's addresses, drm_gem_fb_vmap() should
also return the mappings with the frambuffer data offset added. These
are the addresses were the actual image data is located. A follow-up
set of patches will implement this feature.
Thomas Zimmermann (5):
drm: Define DRM_FORMAT_MAX_PLANES
drm/gem: Provide drm_gem_fb_{vmap,vunmap}()
drm/gem: Clear mapping addresses for unused framebuffer planes
drm/gud: Map framebuffer BOs with drm_gem_fb_vmap()
drm/vkms: Map output framebuffer BOs with drm_gem_fb_vmap()
drivers/gpu/drm/drm_gem_atomic_helper.c | 37 +-------
drivers/gpu/drm/drm_gem_framebuffer_helper.c | 88 ++++++++++++++++++--
drivers/gpu/drm/gud/gud_pipe.c | 11 +--
drivers/gpu/drm/vkms/vkms_composer.c | 2 +-
drivers/gpu/drm/vkms/vkms_drv.h | 6 +-
drivers/gpu/drm/vkms/vkms_writeback.c | 21 +++--
include/drm/drm_fourcc.h | 13 ++-
include/drm/drm_framebuffer.h | 8 +-
include/drm/drm_gem_atomic_helper.h | 3 +-
include/drm/drm_gem_framebuffer_helper.h | 5 ++
10 files changed, 127 insertions(+), 67 deletions(-)
base-commit: 4d00e2309398147acdbfefbe1deb4b0e78868466
--
2.32.0
