[PATCH v2 00/14] improve the fb_setcmap helper

[Peter Rosin]

Hi!

While trying to get CLUT support for the atmel_hlcdc driver, and
specifically for the emulated fbdev interface, I received some
push-back that my feeble in-driver attempts should be solved
by the core. This is my attempt to do it right.

I have obviously not tested all of this with more than a compile,
but patches 1 and 3 are enough to make the atmel-hlcdc driver
do what I need (when patched to support CLUT modes). The rest is
just lots of removals and cleanup made possible by the improved
core.

Please test, I would not be surprised if I have fouled up some
bit-manipulation somewhere in this mostly mechanical change...

Changes since v1:

- Rebased to next-20170621
- Split 1/11 into a preparatory patch, a cleanup patch and then
  the meat in 3/14.
- Handle pseudo-palette for FB_VISUAL_TRUECOLOR.
- Removed the empty .gamma_get/.gamma_set fb helpers from the
  armada driver that I had somehow managed to ignore but which
  0day found real quick.
- Be less judgemental on drivers only providing .gamma_get and
  .gamma_set, but no .load_lut. That's actually a valid thing
  to do if you only need pseudo-palette for FB_VISUAL_TRUECOLOR.
- Add a comment about colliding bitfields in the nouveau driver.
- Remove gamma_set/gamma_get declarations from the radeon driver
  (the definitions were removed in v1).

Cheers,
peda

Peter Rosin (14):
  drm/fb-helper: keep the .gamma_store updated in drm_fb_helper_setcmap
  drm/fb-helper: remove drm_fb_helper_save_lut_atomic
  drm/fb-helper: do a generic fb_setcmap helper in terms of crtc
    .gamma_set
  drm: amd: remove dead code and pointless local lut storage
  drm: armada: remove dead empty functions
  drm: ast: remove dead code and pointless local lut storage
  drm: cirrus: remove dead code and pointless local lut storage
  drm: gma500: remove dead code and pointless local lut storage
  drm: i915: remove dead code and pointless local lut storage
  drm: mgag200: remove dead code and pointless local lut storage
  drm: nouveau: remove dead code and pointless local lut storage
  drm: radeon: remove dead code and pointless local lut storage
  drm: stm: remove dead code and pointless local lut storage
  drm: remove unused and redundant callbacks

 drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c      |  24 ----
 drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h    |   1 -
 drivers/gpu/drm/amd/amdgpu/dce_v10_0.c      |  27 ++---
 drivers/gpu/drm/amd/amdgpu/dce_v11_0.c      |  27 ++---
 drivers/gpu/drm/amd/amdgpu/dce_v6_0.c       |  27 ++---
 drivers/gpu/drm/amd/amdgpu/dce_v8_0.c       |  27 ++---
 drivers/gpu/drm/amd/amdgpu/dce_virtual.c    |  23 ----
 drivers/gpu/drm/armada/armada_crtc.c        |  10 --
 drivers/gpu/drm/armada/armada_crtc.h        |   2 -
 drivers/gpu/drm/armada/armada_fbdev.c       |   2 -
 drivers/gpu/drm/ast/ast_drv.h               |   1 -
 drivers/gpu/drm/ast/ast_fb.c                |  20 ----
 drivers/gpu/drm/ast/ast_mode.c              |  26 +----
 drivers/gpu/drm/cirrus/cirrus_drv.h         |   8 --
 drivers/gpu/drm/cirrus/cirrus_fbdev.c       |   2 -
 drivers/gpu/drm/cirrus/cirrus_mode.c        |  71 +++---------
 drivers/gpu/drm/drm_fb_helper.c             | 164 +++++++++++++---------------
 drivers/gpu/drm/gma500/framebuffer.c        |  22 ----
 drivers/gpu/drm/gma500/gma_display.c        |  32 ++----
 drivers/gpu/drm/gma500/psb_intel_display.c  |   7 +-
 drivers/gpu/drm/gma500/psb_intel_drv.h      |   1 -
 drivers/gpu/drm/i915/intel_drv.h            |   1 -
 drivers/gpu/drm/i915/intel_fbdev.c          |  31 ------
 drivers/gpu/drm/mgag200/mgag200_drv.h       |   5 -
 drivers/gpu/drm/mgag200/mgag200_fb.c        |   2 -
 drivers/gpu/drm/mgag200/mgag200_mode.c      |  62 +++--------
 drivers/gpu/drm/nouveau/dispnv04/crtc.c     |  26 ++---
 drivers/gpu/drm/nouveau/nouveau_crtc.h      |   3 -
 drivers/gpu/drm/nouveau/nouveau_fbcon.c     |  22 ----
 drivers/gpu/drm/nouveau/nv50_display.c      |  40 +++----
 drivers/gpu/drm/radeon/atombios_crtc.c      |   1 -
 drivers/gpu/drm/radeon/radeon_connectors.c  |   7 +-
 drivers/gpu/drm/radeon/radeon_display.c     |  71 +++++-------
 drivers/gpu/drm/radeon/radeon_fb.c          |   2 -
 drivers/gpu/drm/radeon/radeon_legacy_crtc.c |   1 -
 drivers/gpu/drm/radeon/radeon_mode.h        |   4 -
 drivers/gpu/drm/stm/ltdc.c                  |  12 --
 drivers/gpu/drm/stm/ltdc.h                  |   1 -
 include/drm/drm_fb_helper.h                 |  32 ------
 include/drm/drm_modeset_helper_vtables.h    |  16 ---
 40 files changed, 205 insertions(+), 658 deletions(-)

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2.1.4