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From: Alan Mackenzie <acm@muc.de>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Jiri Slaby <jirislaby@kernel.org>,
	Simona Vetter <simona@ffwll.ch>,
	linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org,
	Helge Deller <deller@gmx.de>,
	Thomas Zimmermann <tzimmermann@suse.de>,
	linux-fbdev@vger.kernel.org, dri-devel@lists.freedesktop.org
Cc: acm@muc.de
Subject: [Patch 5/9]: vt: Amend three Kconfig files
Date: Thu, 27 Aug 2026 18:50:35 +0000	[thread overview]
Message-ID: <apCG-zHyuMVYHJ6j@MAC.fritz.box> (raw)
In-Reply-To: <apCEDM2sWv_M354-@MAC.fritz.box>


vt: 32b glyph: 5. Amend three Kconfig files

Until it becomes clear how to integrate CONFIG_A11Y_BRAILLE_CONSOLE and
CONFIG_SPEAKUP, they will remain disabled when CONFIG_FB_GLYPH_21BIT is
#defined.

Signed-off-by: Alan Mackenzie <acm@muc.de>

diff --git a/drivers/accessibility/Kconfig b/drivers/accessibility/Kconfig
index 6b2f79d1f1b8..8f27e1c657b6 100644
--- a/drivers/accessibility/Kconfig
+++ b/drivers/accessibility/Kconfig
@@ -21,6 +21,7 @@ config A11Y_BRAILLE_CONSOLE
 	bool "Console on braille device"
 	depends on VT
 	depends on SERIAL_CORE_CONSOLE
+	depends on !FB_GLYPH_21BIT
 	help
 	  Enables console output on a braille device connected to a 8250
 	  serial port. For now only the VisioBraille device is supported.
diff --git a/drivers/accessibility/speakup/Kconfig b/drivers/accessibility/speakup/Kconfig
index e84fb617acc4..458bee03d3e8 100644
--- a/drivers/accessibility/speakup/Kconfig
+++ b/drivers/accessibility/speakup/Kconfig
@@ -3,6 +3,7 @@ menu "Speakup console speech"
 
 config SPEAKUP
 	depends on VT
+	depends on !FB_GLYPH_21BIT
 	tristate "Speakup core"
 	help
 		This is the Speakup screen reader.  Think of it as a
diff --git a/drivers/gpu/drm/clients/Kconfig b/drivers/gpu/drm/clients/Kconfig
index 6096c623d9d5..0ce8c1506eaa 100644
--- a/drivers/gpu/drm/clients/Kconfig
+++ b/drivers/gpu/drm/clients/Kconfig
@@ -42,6 +42,15 @@ config DRM_FBDEV_EMULATION
 
 	  If in doubt, say "Y".
 
+config FB_GLYPH_21BIT
+	bool "Enable 21-bit glyphs in the frame buffer device"
+	depends on (DRM_FBDEV_EMULATION = y)
+	help
+	  This option enables 21-bit glyphs in the fbdev framebuffer,
+	  surmounting the traditional restriction to 256/512 glyphs dating back
+	  to the VGA hardware of the 1980s and 1990s.  To use this effectively
+	  you will need a suitable font and possibly a suitable keyboard layout.
+
 config DRM_FBDEV_OVERALLOC
 	int "Overallocation of the fbdev buffer"
 	depends on DRM_FBDEV_EMULATION

  parent reply	other threads:[~2026-08-27 18:50 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-08-27 18:38 vt: Enlarge the framebuffer glyph size from 16 to 32 bits Alan Mackenzie
2026-08-27 18:42 ` [Patch 1/9]: Make consolemap.c handle Unicode planes outside BMP Alan Mackenzie
2026-08-28  4:57   ` Jiri Slaby
2026-08-29 11:51     ` Alan Mackenzie
2026-08-27 18:45 ` [Patch 2/9]: Glyph size: Use GLYPH_SZ/HW rather than hardcoded 2, 1 Alan Mackenzie
2026-08-27 18:47 ` [Patch 3/9]: Replace scr_readw/writew by scr_readg/writeg, etc Alan Mackenzie
2026-08-29 12:11   ` Greg Kroah-Hartman
2026-08-29 13:33     ` Alan Mackenzie
2026-08-27 18:48 ` [Patch 4/9]: Amend internal manipulation of glyph structure Alan Mackenzie
2026-08-27 18:50 ` Alan Mackenzie [this message]
2026-08-27 18:52 ` [Patch 6/9]: vt: Use u32 and typedef u1632 to handle whole glyphs Alan Mackenzie
2026-08-27 18:54 ` [Patch 7/9]: vt: Handle up to 2^21 glyphs, rather than 256/512 Alan Mackenzie
2026-08-27 18:56 ` [Patch 8/9]: vt: Enhancements to the VT ioctl interface Alan Mackenzie
2026-08-27 18:58 ` [Patch 9/9]: vt: Misc changes, e.g. to #include directives Alan Mackenzie
2026-08-29 12:06   ` Greg Kroah-Hartman
2026-08-28  6:12 ` vt: Enlarge the framebuffer glyph size from 16 to 32 bits Thomas Zimmermann
2026-08-28 14:36   ` Alan Mackenzie
2026-08-29 12:09     ` Greg Kroah-Hartman
2026-08-29 14:39       ` Alan Mackenzie

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