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