drm/doc: Document uapi requirements in DRM

Everyone knows them, except all the new folks joining from the ARM
side haven't lived through all the pain of the past years and are
entirely surprised when I raise this. Definitely time to document
this.

Last time this was a big discussion was about 6 years ago, when qcom
tried to land a kernel driver without userspace. Dave Airlie made the
rules really clear:

http://airlied.livejournal.com/73115.html

This write-up here is essentially what I've put into a presentation a
while ago, which was also reviewed by Dave:

http://blog.ffwll.ch/2015/05/gfx-kernel-upstreaming-requirements.html

v2: Fix typos Eric&Rob spotted.

v3: Nitpick from Jani.

Cc: Dave Airlie <[email protected]>
Cc: Oded Gabbay <[email protected]>
Cc: Russell King <[email protected]>
Cc: Tomi Valkeinen <[email protected]>
Cc: Eric Anholt <[email protected]>
Cc: Thomas Hellstrom <[email protected]>
Cc: Sinclair Yeh <[email protected]>
Cc: Lucas Stach <[email protected]>
Cc: Benjamin Gaignard <[email protected]>
Cc: Mark Yao <[email protected]>
Cc: Laurent Pinchart <[email protected]>
Cc: Ben Skeggs <[email protected]>
Cc: Rob Clark <[email protected]>
Cc: CK Hu <[email protected]>
Cc: Xinliang Liu <[email protected]>
Cc: Philipp Zabel <[email protected]>
Cc: Stefan Agner <[email protected]>
Cc: Inki Dae <[email protected]>
Cc: Maxime Ripard  <[email protected]>
Cc: Boris Brezillon <[email protected]>
Cc: Jani Nikula <[email protected]>
Cc: Daniel Vetter <[email protected]>
Cc: Thierry Reding <[email protected]>
Cc: Christian König <[email protected]>
Cc: Alex Deucher <[email protected]>
Cc: Gerd Hoffmann <[email protected]>
Cc: Brian Starkey <[email protected]>
Cc: Liviu Dudau <[email protected]>
Cc: Alexey Brodkin <[email protected]>
Acked-by: Dave Airlie <[email protected]>
Reviewed-by: Rob Clark <[email protected]>
Reviewed-by: Christian König <[email protected]>
Reviewed-by: Eric Anholt <[email protected]>
Reviewed-by: Jani Nikula <[email protected]>
Signed-off-by: Daniel Vetter <[email protected]>
Signed-off-by: Dave Airlie <[email protected]>

0 files changed, 0 insertions, 0 deletions