kernel/linux.git/drivers/tty/vt, branch master

Merge tag 'tty-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

2026-04-19T15:44:41+00:00

Pull tty/serial updates from Greg KH: "Here is the set of tty and serial driver changes for 7.1-rc1. Not much here this cycle, biggest thing is the removal of an old driver that never got any actual hardware support (esp32), and the second try to moving the tty ports to their own workqueues (first try was in 7.0-rc1 but was reverted due to problems) Otherwise it's just a small set of driver updates and some vt modifier key enhancements. All have been in linux-next for a while with no reported issues" * tag 'tty-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (35 commits) tty: serial: ip22zilog: Fix section mispatch warning hvc/xen: Check console connection flag serial: sh-sci: Add support for RZ/G3L RSCI dt-bindings: serial: renesas,rsci: Document RZ/G3L SoC tty: atmel_serial: update outdated reference to atmel_tasklet_func() serial: xilinx_uartps: Drop unused include serial: qcom-geni: drop stray newline format specifier serial: 8250: loongson: Enable building on MIPS Loongson64 dt-bindings: serial: 8250: Add Loongson 3A4000 uart compatible serial: 8250_fintek: Add support for F81214E tty: tty_port: add workqueue to flip TTY buffer vt: support ITU-T T.416 color subparameters serial: qcom-geni: Fix RTS behavior with flow control tty: serial: imx: keep dma request disabled before dma transfer setup tty: serial: 8250: Add SystemBase Multi I/O cards serial: pic32_uart: allow driver to be compiled on all architectures with COMPILE_TEST serial: tegra: remove Kconfig dependency on APB DMA controller dt-bindings: serial: amlogic,meson-uart: Add compatible string for A9 dt-bindings: serial: atmel,at91-usart: add microchip,lan9691-usart serial: auart: check clk_enable() return in console write ...

Merge tag 'fbdev-for-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev

2026-04-15T15:37:45+00:00

Pull fbdev updates from Helge Deller: "A major refactorization by Thomas Zimmermann from SUSE regarding handling of console font data, addition of helpers for console font rotation and split into individual components for glyphs, fonts and the overall fbcon state. And there is the round of usual code cleanups and fixes: Cleanups: - atyfb: Remove unused fb_list (Geert Uytterhoeven) - goldfishfb, wmt_ge_rops: use devm_platform_ioremap_resource() (Amin GATTOUT) - matroxfb: Mark variable with __maybe_unused (Andy Shevchenko) - omapfb: Add missing error check for clk_get() (Chen Ni) - tdfxfb: Make the VGA register initialisation a bit more obvious (Daniel Palmer) - macfb: Replace deprecated strcpy with strscpy (Thorsten Blum) Fixes: - tdfxfb, udlfb: avoid divide-by-zero on FBIOPUT_VSCREENINFO (Greg Kroah-Hartman) - omap2: fix inconsistent lock returns in omapfb_mmap (Hongling Zeng) - viafb: check ioremap return value in viafb_lcd_get_mobile_state (Wang Jun)" * tag 'fbdev-for-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev: (40 commits) fbdev: udlfb: avoid divide-by-zero on FBIOPUT_VSCREENINFO fbdev: tdfxfb: avoid divide-by-zero on FBIOPUT_VSCREENINFO fbdev: omap2: fix inconsistent lock returns in omapfb_mmap MAINTAINERS: Add dedicated entry for fbcon fbcon: Put font-rotation state into separate struct fbcon: Fill cursor mask in helper function lib/fonts: Implement font rotation lib/fonts: Refactor glyph-rotation helpers lib/fonts: Refactor glyph-pattern helpers lib/fonts: Implement glyph rotation lib/fonts: Clean up Makefile lib/fonts: Provide helpers for calculating glyph pitch and size vt: Implement helpers for struct vc_font in source file fbcon: Avoid OOB font access if console rotation fails fbdev: atyfb: Remove unused fb_list fbdev: matroxfb: Mark variable with __maybe_unused to avoid W=1 build break fbdev: update help text for CONFIG_FB_NVIDIA fbdev: omapfb: Add missing error check for clk_get() fbdev: viafb: check ioremap return value in viafb_lcd_get_mobile_state lib/fonts: Remove internal symbols and macros from public header file ...

lib/fonts: Provide helpers for calculating glyph pitch and size

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

Implement pitch and size calculation for a single font glyph in the new helpers font_glyph_pitch() and font_glyph_size(). Replace the instances where the calculations are open-coded. Note that in the case of fbcon console rotation, the parameters for a glyph's width and height might be reversed. This is intentional. v2: - fix typos in commit message Signed-off-by: Thomas Zimmermann Signed-off-by: Helge Deller

vt: Implement helpers for struct vc_font in source file

2026-04-07T15:38:06+00:00

Move the helpers vc_font_pitch() and vc_font_size() from the VT header file into source file. They are not called very often, so there's no benefit in keeping them in the headers. Also avoids including from the header. v2: - fix typo in commit description Signed-off-by: Thomas Zimmermann Acked-by: Greg Kroah-Hartman Signed-off-by: Helge Deller

vt: resize saved unicode buffer on alt screen exit after resize

2026-03-30T15:39:44+00:00

Instead of discarding the saved unicode buffer when the console was resized while in the alternate screen, resize it to the current dimensions using vc_uniscr_copy_area() to preserve its content. This properly restores the unicode screen on alt screen exit rather than lazily rebuilding it from a lossy reverse glyph translation. On allocation failure the stale buffer is freed and vc_uni_lines is set to NULL so it gets lazily rebuilt via vc_uniscr_check() when next needed. Fixes: 40014493cece ("vt: discard stale unicode buffer on alt screen exit after resize") Cc: stable Signed-off-by: Nicolas Pitre Link: https://patch.msgid.link/3nsr334n-079q-125n-7807-n4nq818758ns@syhkavp.arg Signed-off-by: Greg Kroah-Hartman

vt: discard stale unicode buffer on alt screen exit after resize

2026-03-30T15:38:47+00:00

When enter_alt_screen() saves vc_uni_lines into vc_saved_uni_lines and sets vc_uni_lines to NULL, a subsequent console resize via vc_do_resize() skips reallocating the unicode buffer because vc_uni_lines is NULL. However, vc_saved_uni_lines still points to the old buffer allocated for the original dimensions. When leave_alt_screen() later restores vc_saved_uni_lines, the buffer dimensions no longer match vc_rows/vc_cols. Any operation that iterates over the unicode buffer using the current dimensions (e.g. csi_J clearing the screen) will access memory out of bounds, causing a kernel oops: BUG: unable to handle page fault for address: 0x0000002000000020 RIP: 0010:csi_J+0x133/0x2d0 The faulting address 0x0000002000000020 is two adjacent u32 space characters (0x20) interpreted as a pointer, read from the row data area past the end of the 25-entry pointer array in a buffer allocated for 80x25 but accessed with 240x67 dimensions. Fix this by checking whether the console dimensions changed while in the alternate screen. If they did, free the stale saved buffer instead of restoring it. The unicode screen will be lazily rebuilt via vc_uniscr_check() when next needed. Fixes: 5eb608319bb5 ("vt: save/restore unicode screen buffer for alternate screen") Cc: stable Tested-by: Liav Mordouch Signed-off-by: Liav Mordouch Reviewed-by: Nicolas Pitre Link: https://patch.msgid.link/20260327170204.29706-1-liavmordouch@gmail.com Signed-off-by: Greg Kroah-Hartman

Merge 7.0-rc5 into tty-next

2026-03-23T08:59:16+00:00

We need the tty/serial fixes in here as well. Signed-off-by: Greg Kroah-Hartman

vt: save/restore unicode screen buffer for alternate screen

2026-03-13T08:15:58+00:00

The alternate screen support added by commit 23743ba64709 ("vt: add support for smput/rmput escape codes") only saves and restores the regular screen buffer (vc_origin), but completely ignores the corresponding unicode screen buffer (vc_uni_lines) creating a messed-up display. Add vc_saved_uni_lines to save the unicode screen buffer when entering the alternate screen, and restore it when leaving. Also ensure proper cleanup in reset_terminal() and vc_deallocate(). Fixes: 23743ba64709 ("vt: add support for smput/rmput escape codes") Cc: stable Signed-off-by: Nicolas Pitre Link: https://patch.msgid.link/5o2p6qp3-91pq-0p17-or02-1oors4417ns7@onlyvoer.pbz Signed-off-by: Greg Kroah-Hartman

vt: support ITU-T T.416 color subparameters

2026-03-12T14:25:59+00:00

The colon ("bit combination 03/10") is a valid character in parameter substrings. ECMA-48 says: Each parameter sub-string consists of one or more bit combinations from 03/00 to 03/10; the bit combinations from 03/00 to 03/09 represent the digits ZERO to NINE; bit combination 03/10 may be used as a separator in a parameter sub-string, for example, to separate the fractional part of a decimal number from the integer part of that number. To my knowledge, the only codes where 03/10 is actually used as a separator are the CSI-m SGR sequences. The colon separated format is superior as an embedded string for software that doesn't wish to link ncurses terminal database, because terminals that do not support the requested SGR sequence can safely skip the sub-parameters rather than misinterpret them as another sequence. Hence, some software have started using this "modern" format [1]. We should support the colon separated format as well. [1] https://github.com/systemd/systemd/commit/6eabe9f2ff48c1b6924724d5afe64e7b661ccdbf Signed-off-by: Ronan Pigott Link: https://patch.msgid.link/20260303010701.631022-1-ronan@rjp.ie Signed-off-by: Greg Kroah-Hartman

vt: add fallback to plain map for modifier-aware key types

2026-03-12T14:07:51+00:00

When a key is pressed with modifiers (Shift, Ctrl, Alt, etc.) and the modifier-specific keymap has no binding (K_HOLE) or doesn't exist, fall back to the plain keymap if the plain entry is a modifier-aware type (KT_CUR or KT_CSI). This allows arrow keys and CSI navigation keys to automatically handle all modifier combinations with just a single plain map entry. The key handlers (k_cur and k_csi) read the modifier state at runtime and encode it into the output sequence. For example, with just: keycode 103 = Up keycode 104 = Csi_Home All these combinations now work automatically: Up -> ESC [ A Shift+Up -> ESC [ 1 ; 2 A Ctrl+Up -> ESC [ 1 ; 5 A Home -> ESC [ 1 ~ Shift+Home -> ESC [ 1 ; 2 ~ Ctrl+Home -> ESC [ 1 ; 5 ~ Previously, each modifier combination required an explicit keymap entry, which was tedious and consumed keymap slots. Explicit modifier bindings still take precedence - the fallback only triggers when the modifier-specific entry is empty. Signed-off-by: Nicolas Pitre Link: https://patch.msgid.link/20260203045457.1049793-4-nico@fluxnic.net Signed-off-by: Greg Kroah-Hartman