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 minimum 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 framebuffer data offset added. These
are the addresses were the actual image data is located. A follow-up
set of patches will implement this feature.
v3:
* free instances of struct vkms_writeback_job on cleanup
or errors
v2:
* update commit message for first patch (Maxime)
* fix error handling after DRM_FORMAT_MAX_PLANES changes
(kernel test robot)
* fix includes (kernel test robot)
* use [static N] notations for array parameters
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 | 96 ++++++++++++++++++--
drivers/gpu/drm/gud/gud_pipe.c | 10 +-
drivers/gpu/drm/vkms/vkms_composer.c | 2 +-
drivers/gpu/drm/vkms/vkms_drv.h | 6 +-
drivers/gpu/drm/vkms/vkms_writeback.c | 28 +++---
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 | 6 ++
10 files changed, 139 insertions(+), 70 deletions(-)
base-commit: 2bda1ca4d4acb4892556fec3a7ea1f02afcd40bb
prerequisite-patch-id: c2b2f08f0eccc9f5df0c0da49fa1d36267deb11d
prerequisite-patch-id: c67e5d886a47b7d0266d81100837557fda34cb24
--
2.32.0
