From: Alan Mackenzie <acm@muc.de>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: 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
Subject: Re: [Patch 3/9]: Replace scr_readw/writew by scr_readg/writeg, etc
Date: Sat, 29 Aug 2026 13:33:59 +0000 [thread overview]
Message-ID: <apLfx9oqYaa36oyn@MAC.fritz.box> (raw)
In-Reply-To: <2026082934-irrigate-tastiness-c4ff@gregkh>
On Sat, Aug 29, 2026 at 14:11:00 +0200, Greg Kroah-Hartman wrote:
> On Thu, Aug 27, 2026 at 06:47:05PM +0000, Alan Mackenzie wrote:
> > vt: 32b glyph: 3. replace scr_readw/writew by scr_readg/writeg, etc.
> I don't understand these lines in your patches, where are they from and
> what are they for?
scr_readg and scr_writeg read and write an entire glyph, regardless of
whether that glyph is 16-bit or 32-bit. The latter is determined by the
setting of CONFIG_FB_GLYPH_21BIT.
This is the main complication in these patches; having to cope with both
sizes of glyph, for backward compatibility, rather than just switching
to 32-bit glyphs.
> thanks,
> greg k-h
--
Alan Mackenzie (Nuremberg, Germany).
next prev parent reply other threads:[~2026-08-29 13:34 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 [this message]
2026-08-27 18:48 ` [Patch 4/9]: Amend internal manipulation of glyph structure Alan Mackenzie
2026-08-27 18:50 ` [Patch 5/9]: vt: Amend three Kconfig files Alan Mackenzie
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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