improve documentation for dmabuf negotiation
Adding
- more details on how the negotiation process works (with a TBD for client side modifier fixation),
- a paragraph on why mmapping DMA-BUFs can be problematic,
- a paragraph about how DMA-BUFs with v4l2 context can be handled.
Open for discussion:
-
Modifierless fastpath for producers, announcing DRM_FORMAT_MOD_INVALID
withoutSPA_POD_PROP_FLAG_DONT_FIXATE
Edited by columbarius