linux-kernel - [PATCH 0/6] fbcon: Move bitops callbacks into separate struct

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Message-ID: <20250818104655.235001-1-tzimmermann@suse.de>
Date: Mon, 18 Aug 2025 12:36:35 +0200
From: Thomas Zimmermann <tzimmermann@...e.de>
To: simona@...ll.ch,
	deller@....de,
	linux-fbdev@...r.kernel.org,
	dri-devel@...ts.freedesktop.org
Cc: linux-kernel@...r.kernel.org,
	Thomas Zimmermann <tzimmermann@...e.de>
Subject: [PATCH 0/6] fbcon: Move bitops callbacks into separate struct

Instances of fbcon use a number callbacks to support tile-based
drawing or console rotation. The fields are writeable in struct
fbcon_ops. Each case; unrotated, various rotated and tile-based
drawing; uses a set of related calbacks. Updating these 'bitops'
at runtime is spread throughout various helper functions.

This series puts related callbacks into dedicated instances of the
new type struct fbcon_bitops. Changing the callbacks at runtime
then only requires to pick the correct instance. It further allows
the various struct fbcon_bitops' to be declared 'static const', which
makes them write-protected at runtime.

Makes the fbcon bitops easier and safer to use and modify.

Thomas Zimmermann (6):
  fbcon: Fix empty lines in fbcon.h
  fbcon: Rename struct fbcon_ops to struct fbcon
  fbcon: Set rotate_font callback with related callbacks
  fbcon: Move fbcon callbacks into struct fbcon_bitops
  fbcon: Streamline setting rotated/unrotated bitops
  fbcon: Pass struct fbcon to callbacks in struct fbcon_bitops

 drivers/video/fbdev/core/bitblit.c      | 148 ++++----
 drivers/video/fbdev/core/fb_internal.h  |   2 +
 drivers/video/fbdev/core/fbcon.c        | 459 ++++++++++++------------
 drivers/video/fbdev/core/fbcon.h        |  33 +-
 drivers/video/fbdev/core/fbcon_ccw.c    | 180 +++++-----
 drivers/video/fbdev/core/fbcon_cw.c     | 172 ++++-----
 drivers/video/fbdev/core/fbcon_rotate.c |  47 +--
 drivers/video/fbdev/core/fbcon_rotate.h |  18 +-
 drivers/video/fbdev/core/fbcon_ud.c     | 192 +++++-----
 drivers/video/fbdev/core/softcursor.c   |  18 +-
 drivers/video/fbdev/core/tileblit.c     |  49 +--
 11 files changed, 681 insertions(+), 637 deletions(-)

-- 
2.50.1