[RFC PATCH 0/3] drm/nouveau/dispnv04 overlay and primary fb format fixes

[Ilia Mirkin]

This came out of some debugging I was doing to figure out how BE mode works
on this hardware. Among other things, it came out that we're not exposing
16-bpp mode support and that the ARGB8888 mode that we do expose is broken.
Also the overlay logic was pretty broken, I must have only tested with very
"normal" overlay buffer sizes with modetest before.

That said, this code has only received literal testing on a NV34/G5 PPC combo.
I was poking at various registers on a NV34/x86 to make modetest display the
correct data though. That's where e.g. the pitch mask comes from.

I haven't at all tested on my NV05 or NV1x hardware. Should probably do that
before we push this out. But since I've already been sitting on these patches
for a few weeks, thought I'd get them out there.

Ilia Mirkin (3):
  drm/nouveau/overlay: improve error detection, fix pitch setting
  drm/nouveau/overlay: add NV21 support
  drm/nouveau/dispnv04: fix exposed format list

 drivers/gpu/drm/nouveau/dispnv04/crtc.c    | 36 +++++++++++-
 drivers/gpu/drm/nouveau/dispnv04/overlay.c | 89 +++++++++++++++++++-----------
 2 files changed, 93 insertions(+), 32 deletions(-)

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2.13.0