From: Helge Deller <deller@gmx.de>
To: DRI Development <dri-devel@lists.freedesktop.org>,
linux-fbdev@vger.kernel.org,
Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>,
John David Anglin <dave.anglin@bell.net>
Subject: [PATCH v3 0/3] Fix regression introduced by disabling accelerated scrolling in fbcon
Date: Tue, 1 Feb 2022 19:59:51 +0100 [thread overview]
Message-ID: <20220201185954.169768-1-deller@gmx.de> (raw)
This series reverts two patches which disabled scrolling acceleration in
fbcon/fbdev. Those patches introduced a regression for fbdev-supported graphic
cards because of the performance penalty by doing screen scrolling by software
instead of using existing 2D hardware acceleration.
The third patch introduces a new config option
CONFIG_FRAMEBUFFER_CONSOLE_LEGACY_ACCELERATION, which -if enabled- switches
fbcon to utilize the bitblt and fillrect hardware acceleration in the
framebuffer console. If disabled, such acceleration will not be used, even if
it is supported by the graphics hardware driver.
This series is being discussed on linux-fbdev and dri-devel mailing lists.
Helge
Helge Deller (3):
Revert "fbdev: Garbage collect fbdev scrolling acceleration, part 1
(from TODO list)"
Revert "fbcon: Disable accelerated scrolling"
fbcon: Add option to enable legacy hardware acceleration
Documentation/gpu/todo.rst | 24 -
drivers/video/console/Kconfig | 11 +
drivers/video/fbdev/core/bitblit.c | 16 +
drivers/video/fbdev/core/fbcon.c | 557 +++++++++++++++++++++++-
drivers/video/fbdev/core/fbcon.h | 72 +++
drivers/video/fbdev/core/fbcon_ccw.c | 28 +-
drivers/video/fbdev/core/fbcon_cw.c | 28 +-
drivers/video/fbdev/core/fbcon_rotate.h | 9 +
drivers/video/fbdev/core/fbcon_ud.c | 37 +-
drivers/video/fbdev/core/tileblit.c | 16 +
drivers/video/fbdev/skeletonfb.c | 12 +-
include/linux/fb.h | 2 +-
12 files changed, 744 insertions(+), 68 deletions(-)
--
2.34.1
next reply other threads:[~2022-02-01 19:00 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-01 18:59 Helge Deller [this message]
2022-02-01 18:59 ` [PATCH v3 1/3] Revert "fbdev: Garbage collect fbdev scrolling acceleration, part 1 (from TODO list)" Helge Deller
2022-02-01 18:59 ` [PATCH v3 2/3] Revert "fbcon: Disable accelerated scrolling" Helge Deller
2022-02-01 18:59 ` [PATCH v3 3/3] fbcon: Add option to enable legacy hardware acceleration Helge Deller
2022-02-01 20:11 ` Daniel Vetter
2022-02-01 20:11 ` Daniel Vetter
2022-02-01 22:52 ` Helge Deller
2022-02-01 22:52 ` Helge Deller
2022-02-02 11:05 ` Daniel Vetter
2022-02-02 11:05 ` Daniel Vetter
2022-02-02 13:41 ` Helge Deller
2022-02-02 13:41 ` Helge Deller
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