[0/8] fbdev: Use helpers for deferred I/O

Message

Thomas Zimmermann Aug. 28, 2023, 1:14 p.m. UTC

Here's another patchset for deferred-I/O helpers. Update a number
of fbdev drivers with deferred I/O to use fbdev's helper macros and
Kconfig tokens.

Generating and initializing via helpers macros will later allow for
a fine-grained setup, depending on Kconfig options. For example, it
will be possible to leave out file I/O if FB_DEVICE has not been set.

Each driver in special in its own way. The smscufx and udlfb drivers
support file I/O without damage updates. (That probably doesn't work
correctly.) So they provide their own mmap code. The hyperv_fb driver
sometimes operates on memory in I/O address spaces and fails to do
damage handling correctly for write operations. The picolcd and fbtft
drivers are outside of fbdev.

Thomas Zimmermann (8):
  fbdev/smscufx: Use fb_ops helpers for deferred I/O
  fbdev/udlfb: Use fb_ops helpers for deferred I/O
  fbdev: Add Kconfig macro FB_IOMEM_HELPERS_DEFERRED
  fbdev/hyperv_fb: Use fb_ops helpers for deferred I/O
  hid: Remove trailing whitespace
  hid/picolcd: Use fb_ops helpers for deferred I/O
  staging/fbtft: Initialize fb_op struct as static const
  staging/fbtft: Use fb_ops helpers for deferred I/O

 drivers/hid/Kconfig                |  8 +--
 drivers/hid/hid-picolcd_fb.c       | 73 ++++++----------------
 drivers/staging/fbtft/Kconfig      |  6 +-
 drivers/staging/fbtft/fbtft-core.c | 99 ++++++++----------------------
 drivers/video/fbdev/Kconfig        |  5 +-
 drivers/video/fbdev/core/Kconfig   |  6 ++
 drivers/video/fbdev/hyperv_fb.c    | 48 +++++----------
 drivers/video/fbdev/smscufx.c      | 85 +++++++------------------
 drivers/video/fbdev/udlfb.c        | 89 +++++++--------------------
 9 files changed, 114 insertions(+), 305 deletions(-)