[PATCH 0/5] i915 fb modifier support, respun

[Daniel Vetter]

Hi all,

So this is the very quickly spun together version for my take on fb modifiers.
Aim is to reduce the churn a bit with:
- Only validate fb modifiers and old tiling_mode behaviour in framebuffer_init
  to ensure they are consistent. Don't convert over all the code for old
  platforms.
- Guarantee that X-tiling always implies that the underlying bo is fenced with
  X-tiling mode, too. Otherwise the implications into existing code (e.g.
  adjusting fbc) are a bit too much.
- One draft patch to show how I think we should us fb modifiers: Directly switch
  on them like we do with obj->tiling_mode, no need to have remap/masking
  functions around. At least for now.

This isn't complete since some of the shared code, specifically the fb_align
stuff used by framebuffer_init and the fbdev emulation code still uses
obj->tiling_mode. That needs to be converted into a function which takes u64 fb
modifers (for shared code) and the old code retained in an i9xx_ variant (for
the plane_config readout code for old platforms). Then we can add the skl+ stuff
in another version, together with a if/else.

And then framebuffer_init obvsiouly needs to be extended.

Commments highly welcome.

Cheers, Daniel

Daniel Vetter (3):
  drm/i915: Add fb format modifier support
  drm/i915: Use fb format modifiers in skylake_update_primary_plane
  drm: Also check unused fields for addfb2

Tvrtko Ursulin (2):
  drm/i915: Add tiled framebuffer modifiers
  drm/i915: Announce support for framebuffer modifiers

 drivers/gpu/drm/drm_crtc.c           | 17 +++++++++++++++++
 drivers/gpu/drm/i915/i915_drv.h      |  1 +
 drivers/gpu/drm/i915/intel_display.c | 32 ++++++++++++++++++++++++--------
 include/uapi/drm/drm_fourcc.h        | 31 +++++++++++++++++++++++++++++++
 4 files changed, 73 insertions(+), 8 deletions(-)

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2.1.4