[Intel-gfx] [PATCH 0/9] More simple FBC fixes

[Paulo Zanoni]

From: Paulo Zanoni <paulo.r.zanoni at intel.com>

Hi

Since the previous FBC series is already entirely reviewed, it's time to submit
a few more FBC patches to the mailing list. These patches just fix some simple
bugs and annoyances: nothing really major. I tested them on my BDW and they pass
the tests I have.

In theory we could even think about maybe enabling FBC on HSW+ since I can't
think of any bugs remaining on these platforms. The biggest reason to prevent
that is that I still didn't upstream the FBC tests I wrote since I still didn't
integrate them to kms_fbc_crc - which I'm also running.

This doesn't mean FBC's TODO list is empty: there are still a lot of small
improvements to do, and one of them is to _not_ disable FBC during page flips.
I also didn't really do any power or performance tests yet: the focus is
completely on bugs.

Regarding the previous platforms, I think there could be some hope to support
FBC on ILK+, but I'm really only focused on HSW+, so I don't know if we're
missing some checks and restrictions. For the older platforms, I think that,
given all the conditions, the risk of enabling FBC and breaking these platforms
even more is probably not worth it.

Thanks,
Paulo

Paulo Zanoni (9):
  drm/i915: don't reallocate the compressed FB at every frame
  drm/i915: fix the FBC CFB size tracking
  drm/i915: don't increment the FBC threshold at fbc_enable
  drm/i915: don't free the CFB while FBC is enabled
  drm/i915: don't set the FBC plane select bits on HSW+
  drm/i915: add the FBC mutex
  drm/i915: don't alloc/free fbc_work at every update
  drm/i915: print FBC compression status on debugfs
  drm/i915: FBC only supports 16bpp and 32bpp

 drivers/gpu/drm/i915/i915_debugfs.c    |   5 +
 drivers/gpu/drm/i915/i915_drv.h        |   5 +-
 drivers/gpu/drm/i915/i915_gem_stolen.c |  16 ++--
 drivers/gpu/drm/i915/i915_reg.h        |   3 +
 drivers/gpu/drm/i915/intel_fbc.c       | 161 +++++++++++++++++++++------------
 5 files changed, 123 insertions(+), 67 deletions(-)

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2.1.3