From: Gerd Hoffmann <kraxel@redhat.com>
To: Helge Deller <deller@gmx.de>
Cc: Daniel Vetter <daniel@ffwll.ch>,
Linux Fbdev development list <linux-fbdev@vger.kernel.org>,
Sven Schnelle <svens@stackframe.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
DRI Development <dri-devel@lists.freedesktop.org>,
Javier Martinez Canillas <javierm@redhat.com>,
Geert Uytterhoeven <geert@linux-m68k.org>,
Thomas Zimmermann <tzimmermann@suse.de>,
Linus Torvalds <torvalds@linux-foundation.org>
Subject: Re: [PATCH] MAINTAINERS: Add Helge as fbdev maintainer
Date: Tue, 18 Jan 2022 07:29:47 +0100 [thread overview]
Message-ID: <20220118062947.6kfuam6ah63z5mmn@sirius.home.kraxel.org> (raw)
In-Reply-To: <b32ffceb-ea90-3d26-f20e-29ae21c68fcf@gmx.de>
Hi,
> Please correct me if I'm wrong, but text-console emulation/scrolling on DRM is
> currently unaccelerated and bound to Truecolour modes only,
Yes. Adding support for formats beside argb8888 to the drm fbcon
emulation shouldn't be that much of a problem though.
Acceleration is harder. The scroll acceleration had issues nobody
addressed for years, and on modern hardware it is simply not used, which
is probably the reason nobody stepped up fixing things and it ended up
being dropped. Bringing it back is much more work than just reverting
the commits removing it.
Also note that using a shadow framebuffer allows to decouple fbcon
updates and scanout framebuffer updates. Can be used to speed up
things without depending on the 2d blitter.
take care,
Gerd
WARNING: multiple messages have this Message-ID (diff)
From: Gerd Hoffmann <kraxel@redhat.com>
To: Helge Deller <deller@gmx.de>
Cc: Linux Fbdev development list <linux-fbdev@vger.kernel.org>,
Thomas Zimmermann <tzimmermann@suse.de>,
Linus Torvalds <torvalds@linux-foundation.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
DRI Development <dri-devel@lists.freedesktop.org>,
Javier Martinez Canillas <javierm@redhat.com>,
Geert Uytterhoeven <geert@linux-m68k.org>,
Sven Schnelle <svens@stackframe.org>
Subject: Re: [PATCH] MAINTAINERS: Add Helge as fbdev maintainer
Date: Tue, 18 Jan 2022 07:29:47 +0100 [thread overview]
Message-ID: <20220118062947.6kfuam6ah63z5mmn@sirius.home.kraxel.org> (raw)
In-Reply-To: <b32ffceb-ea90-3d26-f20e-29ae21c68fcf@gmx.de>
Hi,
> Please correct me if I'm wrong, but text-console emulation/scrolling on DRM is
> currently unaccelerated and bound to Truecolour modes only,
Yes. Adding support for formats beside argb8888 to the drm fbcon
emulation shouldn't be that much of a problem though.
Acceleration is harder. The scroll acceleration had issues nobody
addressed for years, and on modern hardware it is simply not used, which
is probably the reason nobody stepped up fixing things and it ended up
being dropped. Bringing it back is much more work than just reverting
the commits removing it.
Also note that using a shadow framebuffer allows to decouple fbcon
updates and scanout framebuffer updates. Can be used to speed up
things without depending on the 2d blitter.
take care,
Gerd
next prev parent reply other threads:[~2022-01-18 6:30 UTC|newest]
Thread overview: 149+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-14 18:11 [PATCH] MAINTAINERS: Add Helge as fbdev maintainer Helge Deller
2022-01-14 18:31 ` Geert Uytterhoeven
2022-01-14 18:31 ` Geert Uytterhoeven
2022-01-17 9:48 ` Daniel Vetter
2022-01-17 9:48 ` Daniel Vetter
2022-01-17 10:02 ` Daniel Vetter
2022-01-17 10:02 ` Daniel Vetter
2022-01-17 10:19 ` Javier Martinez Canillas
2022-01-17 10:19 ` Javier Martinez Canillas
2022-01-17 10:49 ` Jani Nikula
2022-01-17 10:57 ` Helge Deller
2022-01-17 12:15 ` Helge Deller
2022-01-17 12:15 ` Helge Deller
2022-01-17 12:57 ` Gerd Hoffmann
2022-01-17 12:57 ` Gerd Hoffmann
2022-01-17 13:29 ` Geert Uytterhoeven
2022-01-17 13:29 ` Geert Uytterhoeven
2022-01-17 13:51 ` Thomas Zimmermann
2022-01-17 13:51 ` Thomas Zimmermann
2022-01-17 14:10 ` Geert Uytterhoeven
2022-01-17 14:10 ` Geert Uytterhoeven
2022-01-17 14:47 ` Helge Deller
2022-01-17 14:47 ` Helge Deller
2022-01-17 15:03 ` Daniel Vetter
2022-01-17 15:03 ` Daniel Vetter
2022-01-17 20:17 ` Helge Deller
2022-01-17 20:17 ` Helge Deller
2022-01-18 6:29 ` Gerd Hoffmann [this message]
2022-01-18 6:29 ` Gerd Hoffmann
2022-01-18 8:10 ` Geert Uytterhoeven
2022-01-18 8:10 ` Geert Uytterhoeven
2022-01-18 11:44 ` Daniel Vetter
2022-01-18 11:44 ` Daniel Vetter
2022-01-18 14:23 ` Thomas Zimmermann
2022-01-18 14:23 ` Thomas Zimmermann
2022-01-18 14:39 ` Simon Ser
2022-01-18 14:39 ` Simon Ser
2022-01-20 12:50 ` Gerd Hoffmann
2022-01-20 12:50 ` Gerd Hoffmann
2022-01-21 8:55 ` Daniel Vetter
2022-01-21 8:55 ` Daniel Vetter
2022-01-24 18:38 ` Geert Uytterhoeven
2022-01-24 18:38 ` Geert Uytterhoeven
2022-01-24 18:50 ` Daniel Vetter
2022-01-24 18:50 ` Daniel Vetter
2022-01-24 19:05 ` Thomas Zimmermann
2022-01-24 19:05 ` Thomas Zimmermann
2022-01-18 8:20 ` Helge Deller
2022-01-18 8:20 ` Helge Deller
2022-01-18 9:16 ` Gerd Hoffmann
2022-01-18 9:16 ` Gerd Hoffmann
2022-01-18 10:13 ` Helge Deller
2022-01-18 10:13 ` Helge Deller
2022-01-18 10:44 ` Helge Deller
2022-01-18 10:44 ` Helge Deller
2022-01-18 12:48 ` Gerd Hoffmann
2022-01-18 12:48 ` Gerd Hoffmann
2022-01-17 15:05 ` Thomas Zimmermann
2022-01-17 15:05 ` Thomas Zimmermann
2022-01-17 16:05 ` Helge Deller
2022-01-17 16:05 ` Helge Deller
2022-01-17 14:53 ` Thomas Zimmermann
2022-01-17 14:53 ` Thomas Zimmermann
2022-01-18 6:11 ` Gerd Hoffmann
2022-01-18 6:11 ` Gerd Hoffmann
2022-01-18 8:09 ` Helge Deller
2022-01-18 8:09 ` Helge Deller
2022-01-17 15:00 ` Daniel Vetter
2022-01-17 15:00 ` Daniel Vetter
2022-01-17 15:42 ` Helge Deller
2022-01-17 15:42 ` Helge Deller
2022-01-17 15:56 ` Daniel Vetter
2022-01-17 15:56 ` Daniel Vetter
2022-01-17 15:58 ` Thomas Zimmermann
2022-01-17 15:58 ` Thomas Zimmermann
2022-01-17 16:21 ` Helge Deller
2022-01-17 16:21 ` Helge Deller
2022-01-17 16:38 ` Daniel Vetter
2022-01-17 16:38 ` Daniel Vetter
2022-01-17 17:19 ` Helge Deller
2022-01-17 17:19 ` Helge Deller
2022-01-17 19:45 ` Helge Deller
2022-01-17 19:45 ` Helge Deller
2022-01-17 21:55 ` Ilia Mirkin
2022-01-17 21:55 ` Ilia Mirkin
2022-01-18 11:14 ` Daniel Vetter
2022-01-18 11:14 ` Daniel Vetter
2022-01-18 14:14 ` Thomas Zimmermann
2022-01-18 14:14 ` Thomas Zimmermann
2022-01-17 21:40 ` Jani Nikula
2022-01-17 21:40 ` Jani Nikula
2022-01-17 21:44 ` Helge Deller
2022-01-17 21:44 ` Helge Deller
2022-01-18 8:38 ` Jani Nikula
2022-01-18 8:38 ` Jani Nikula
2022-01-18 8:41 ` Geert Uytterhoeven
2022-01-18 8:41 ` Geert Uytterhoeven
2022-01-18 11:41 ` Daniel Vetter
2022-01-18 11:41 ` Daniel Vetter
2022-01-18 12:11 ` Simon Ser
2022-01-18 12:11 ` Simon Ser
2022-01-18 8:54 ` Helge Deller
2022-01-18 8:54 ` Helge Deller
2022-01-18 9:33 ` Javier Martinez Canillas
2022-01-18 9:33 ` Javier Martinez Canillas
2022-01-18 9:45 ` Geert Uytterhoeven
2022-01-18 9:45 ` Geert Uytterhoeven
2022-01-18 11:18 ` Daniel Vetter
2022-01-18 11:18 ` Daniel Vetter
2022-01-18 11:42 ` Helge Deller
2022-01-18 11:42 ` Helge Deller
2022-01-18 8:41 ` Helge Deller
2022-01-18 8:41 ` Helge Deller
2022-01-18 9:12 ` Helge Deller
2022-01-18 9:12 ` Helge Deller
2022-01-17 11:16 ` Thomas Zimmermann
2022-01-17 11:33 ` Helge Deller
2022-01-17 12:13 ` Thomas Zimmermann
2022-01-17 18:47 ` Sven Schnelle
2022-01-18 8:33 ` Pekka Paalanen
2022-01-18 8:33 ` Pekka Paalanen
2022-01-18 9:53 ` Gerd Hoffmann
2022-01-18 9:53 ` Gerd Hoffmann
2022-01-18 11:22 ` Daniel Vetter
2022-01-18 11:22 ` Daniel Vetter
2022-01-18 12:07 ` Gerd Hoffmann
2022-01-18 12:07 ` Gerd Hoffmann
2022-01-19 8:39 ` Pekka Paalanen
2022-01-19 8:39 ` Pekka Paalanen
2022-01-20 9:06 ` Geert Uytterhoeven
2022-01-20 9:06 ` Geert Uytterhoeven
2022-01-20 11:32 ` Daniel Vetter
2022-01-20 11:32 ` Daniel Vetter
2022-01-20 12:13 ` Geert Uytterhoeven
2022-01-20 12:13 ` Geert Uytterhoeven
2022-01-20 12:33 ` Daniel Vetter
2022-01-20 12:33 ` Daniel Vetter
2022-01-20 12:46 ` Geert Uytterhoeven
2022-01-20 12:46 ` Geert Uytterhoeven
2022-01-24 18:50 ` Geert Uytterhoeven
2022-01-24 18:50 ` Geert Uytterhoeven
2022-01-24 19:37 ` Daniel Vetter
2022-01-24 19:37 ` Daniel Vetter
2022-01-20 11:51 ` Gerd Hoffmann
2022-01-20 11:51 ` Gerd Hoffmann
2022-01-18 8:58 ` Michel Dänzer
2022-01-18 10:05 ` Sven Schnelle
2022-01-18 10:05 ` Sven Schnelle
2022-01-18 14:06 ` Thomas Zimmermann
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