linux.git/drivers/video/fbdev/core/fbcon.h, branch v7.1

fbcon: Put font-rotation state into separate struct

2026-04-07T15:38:07+00:00

Move all temporary state of the font-rotation code into the struct
rotated in struct fbcon_par. Protect it with the Kconfig symbol
CONFIG_FRAMEBUFFER_CONSOLE_ROTATION. Avoids mixing it up with fbcon's
regular state.

v2:
- fix typos

Signed-off-by: Thomas Zimmermann 
Signed-off-by: Helge Deller

fbcon: Fill cursor mask in helper function

2026-04-07T15:38:07+00:00

Fbcon creates a cursor shape on the fly from the user-configured
settings. The logic to create a glyph with the cursor's bitmap mask
is duplicated in four places. In the cases that involve console
rotation, the implementation further rotates the cursor glyph for
displaying.

Consolidate all cursor-mask creation in a single helper. Update the
callers accordingly. For console rotation, use the glyph helpers to
rotate the created cursor glyph to the correct orientation.

v2:
- fix sparse truncated-bits warning

Signed-off-by: Thomas Zimmermann 
Signed-off-by: Helge Deller

lib/fonts: Implement font rotation

2026-04-07T15:38:07+00:00

Move the core of fbcon's font-rotation code to the font library as
the new helper font_data_rotate(). The code can rotate in steps of
90°. For completeness, it also copies the glyph data for multiples
of 360°.

Bring back the memset optimization. A memset to 0 again clears the
whole glyph output buffer. Then use the internal rotation helpers on
the cleared output. Fbcon's original implementation worked like this,
but lost it during refactoring.

Replace fbcon's font-rotation code with the new implementations.
All that's left to do for fbcon is to maintain its internal fbcon
state.

v2:
- fix typos

Signed-off-by: Thomas Zimmermann 
Signed-off-by: Helge Deller

lib/fonts: Manage font-data lifetime with font_data_get/_put()

2026-03-09T14:47:21+00:00

Add font_data_get() and font_data_put(). Update consoles to use them
over REFCOUNT() and plain kfree().

Newly allocated font data starts with a reference count of 1. Loading
the font puts the previously loaded font. If the reference count reaches
zero, font_data_put() frees the font data.

The kernel stores a refcount of zero for internal font data. Invoking
font_data_get() and font_data_put() tests this internally and returns
success without further operation. From the caller's perspective,
getting and putting works the same for all font data.

Fbcon used the userfont flag distinguish between internal fonts and
fonts loaded by user space. Only the latter where refcounted. With the
new helper's automatic handling of internal font data, remove the
userfont flag from fbcon.

Newport_con uses a default font, FONT_DATA, until user space loads
custom font data. Remove all special cases for FONT_DATA, as the get
and put calls' read-only handling also covers this case.

v3:
- fix module linker error wrt font symbols (Nathan, Arnd)
- fix typos

Signed-off-by: Thomas Zimmermann 
Signed-off-by: Helge Deller

lib/fonts: Store font data as font_data_t; update consoles

2026-03-09T14:47:20+00:00

Store font data as pointer to font_data_t instead of unsigned char.
Update consoles.

Pointers to font data refer to the raw data. There is a hidden header
before the data that contains additional state. Document the existing
layout and semantics of font_data_t.

The data field in struct vc_font can be used by any console. Therefore
it still points to plain data without the additional header. Fbcon sets
its value from struct fbcon_display.fontdata. Hence, update the size
test in fbcon_resize() to use struct fbcon_display.fontdata instead of
struct vc_font.data.

v3:
- fix typos (Helge)
v2:
- 'Font lookup' -> 'Font description' in 

Signed-off-by: Thomas Zimmermann 
Signed-off-by: Helge Deller

vt: Store font in struct vc_font

2026-03-09T14:47:20+00:00

Replace struct console_font with struct vc_font for the type of the
vc_font field of struct vc_data. Struct console_font is UAPI, which
prevents further changes. Hence a new data type is required.

Struct console_font has a documented vertical pitch of 32 bytes. This
is not the case after the font data has been loaded into the kernel.
Changing the type of vc_font addresses this inconsistency.

The font data is now declared as constant, as it might come from the
kernel's read-only section. There's some fallout throughout the console
code where non-const variables refer to it. Fix them. A later update
will declare the font data to a dedicated data type.

v3:
- fix typos

Signed-off-by: Thomas Zimmermann 
Signed-off-by: Helge Deller

fbcon: Remove struct fbcon_display.inverse

2026-02-14T10:09:47+00:00

The field inverse in struct fbcon_display is unused. Remove it.

Signed-off-by: Thomas Zimmermann 
Cc:  # v6.0+
Signed-off-by: Helge Deller

fbcon: Remove fb_debug_enter/_leave from struct fb_ops

2025-12-02T08:20:44+00:00

There are no implementations of fb_debug_enter and fb_debug_leave.
Remove the callbacks from struct fb_ops and clean up the caller.

The field save_graphics in fbcon_par is also no longer required.
Remove it as well.

Signed-off-by: Thomas Zimmermann 
Reviewed-by: Simona Vetter 
Acked-by: Daniel Thompson (RISCstar) 
Link: https://patch.msgid.link/20251125130634.1080966-6-tzimmermann@suse.de

fbcon: Streamline setting rotated/unrotated bitops

2025-09-19T08:04:06+00:00

Support for console rotation is somewhat bolted onto the helper
fbcon_set_bitops() for unrotated displays.

Update fbcon_set_bitops() with a switch statement that picks the
correct settings helper for the current rotation. For unrotated
consoles, set the bitops for in the new helper fbcon_set_bitops_ur().
Rename the other, existing helpers to match the common naming
scheme.

The old helper fbcon_set_rotate() is no longer used.

Signed-off-by: Thomas Zimmermann 
Reviewed-by: Sam Ravnborg 
Link: https://lore.kernel.org/r/20250909124616.143365-6-tzimmermann@suse.de

fbcon: Move fbcon callbacks into struct fbcon_bitops

2025-09-19T08:04:05+00:00

Depending on rotation settings, fbcon sets different callback
functions in struct fbcon_par from within fbcon_set_bitops(). Declare
the callback functions in the new type struct fbcon_bitops. Then
only replace the single bitops pointer in struct fbcon_par.

Keeping callbacks in constant instances of struct fbcon_bitops
makes it harder to exploit the callbacks. Also makes the code slightly
easier to maintain.

For tile-based consoles, there's a separate instance of the bitops
structure.

Signed-off-by: Thomas Zimmermann 
Reviewed-by: Sam Ravnborg 
Link: https://lore.kernel.org/r/20250909124616.143365-5-tzimmermann@suse.de