fbdev: remove cyblafb driver
A tridentfb driver has all the functionality of the cyblafb driver without the bugs of the latter. Changes to the tridentfb driver: - FBINFO_READS_FAST added to the tridentfb. The cyblafb used a blitter for scrolling which is faster than color expansion on Cyberblade chipsets. The blitter is slower on a discrete Blade3D core. Use the blitter for scrolling in the tridentfb only for integrated Blade3D cores. Now, scrolling speed is about equal for the tridentfb and the cyblafb. - a copyright notice addition is done on request of Jani Monoses (the first author of the tridentfb). Tested on AGP Blade3D card and PCChips M787CLR motherboard: VIA C3 cpu + VT8601 north bridge (aka Cyberblade/i1). Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl> Cc: "Jani Monoses" <jani@ubuntu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Krzysztof Helt
Linus Torvalds
parent
ec549a0fdc
commit
ddb53d48da
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@ -11,8 +11,6 @@ aty128fb.txt
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- info on the ATI Rage128 frame buffer driver.
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- info on the ATI Rage128 frame buffer driver.
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cirrusfb.txt
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cirrusfb.txt
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- info on the driver for Cirrus Logic chipsets.
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- info on the driver for Cirrus Logic chipsets.
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cyblafb/
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- directory with documentation files related to the cyblafb driver.
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deferred_io.txt
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deferred_io.txt
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- an introduction to deferred IO.
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- an introduction to deferred IO.
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fbcon.txt
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fbcon.txt
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@ -1,13 +0,0 @@
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Bugs
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====
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I currently don't know of any bug. Please do send reports to:
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- linux-fbdev-devel@lists.sourceforge.net
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- Knut_Petersen@t-online.de.
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Untested features
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=================
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All LCD stuff is untested. If it worked in tridentfb, it should work in
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cyblafb. Please test and report the results to Knut_Petersen@t-online.de.
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@ -1,7 +0,0 @@
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Thanks to
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=========
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* Alan Hourihane, for writing the X trident driver
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* Jani Monoses, for writing the tridentfb driver
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* Antonino A. Daplas, for review of the first published
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version of cyblafb and some code
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* Jochen Hein, for testing and a helpfull bug report
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@ -1,17 +0,0 @@
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Available Documentation
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=======================
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Apollo PLE 133 Chipset VT8601A North Bridge Datasheet, Rev. 1.82, October 22,
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2001, available from VIA:
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http://www.viavpsd.com/product/6/15/DS8601A182.pdf
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The datasheet is incomplete, some registers that need to be programmed are not
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explained at all and important bits are listed as "reserved". But you really
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need the datasheet to understand the code. "p. xxx" comments refer to page
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numbers of this document.
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XFree/XOrg drivers are available and of good quality, looking at the code
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there is a good idea if the datasheet does not provide enough information
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or if the datasheet seems to be wrong.
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@ -1,154 +0,0 @@
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#
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# Sample fb.modes file
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#
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# Provides an incomplete list of working modes for
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# the cyberblade/i1 graphics core.
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#
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# The value 4294967256 is used instead of -40. Of course, -40 is not
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# a really reasonable value, but chip design does not always follow
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# logic. Believe me, it's ok, and it's the way the BIOS does it.
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#
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# fbset requires 4294967256 in fb.modes and -40 as an argument to
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# the -t parameter. That's also not too reasonable, and it might change
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# in the future or might even be differt for your current version.
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#
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mode "640x480-50"
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geometry 640 480 2048 4096 8
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timings 47619 4294967256 24 17 0 216 3
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endmode
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mode "640x480-60"
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geometry 640 480 2048 4096 8
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timings 39682 4294967256 24 17 0 216 3
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endmode
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mode "640x480-70"
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geometry 640 480 2048 4096 8
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timings 34013 4294967256 24 17 0 216 3
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endmode
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mode "640x480-72"
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geometry 640 480 2048 4096 8
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timings 33068 4294967256 24 17 0 216 3
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endmode
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mode "640x480-75"
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geometry 640 480 2048 4096 8
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timings 31746 4294967256 24 17 0 216 3
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endmode
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mode "640x480-80"
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geometry 640 480 2048 4096 8
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timings 29761 4294967256 24 17 0 216 3
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endmode
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mode "640x480-85"
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geometry 640 480 2048 4096 8
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timings 28011 4294967256 24 17 0 216 3
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endmode
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mode "800x600-50"
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geometry 800 600 2048 4096 8
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timings 30303 96 24 14 0 136 11
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endmode
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mode "800x600-60"
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geometry 800 600 2048 4096 8
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timings 25252 96 24 14 0 136 11
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endmode
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mode "800x600-70"
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geometry 800 600 2048 4096 8
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timings 21645 96 24 14 0 136 11
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endmode
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mode "800x600-72"
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geometry 800 600 2048 4096 8
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timings 21043 96 24 14 0 136 11
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endmode
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mode "800x600-75"
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geometry 800 600 2048 4096 8
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timings 20202 96 24 14 0 136 11
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endmode
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mode "800x600-80"
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geometry 800 600 2048 4096 8
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timings 18939 96 24 14 0 136 11
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endmode
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mode "800x600-85"
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geometry 800 600 2048 4096 8
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timings 17825 96 24 14 0 136 11
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endmode
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mode "1024x768-50"
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geometry 1024 768 2048 4096 8
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timings 19054 144 24 29 0 120 3
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endmode
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mode "1024x768-60"
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geometry 1024 768 2048 4096 8
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timings 15880 144 24 29 0 120 3
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endmode
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mode "1024x768-70"
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geometry 1024 768 2048 4096 8
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timings 13610 144 24 29 0 120 3
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endmode
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mode "1024x768-72"
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geometry 1024 768 2048 4096 8
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timings 13232 144 24 29 0 120 3
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endmode
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mode "1024x768-75"
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geometry 1024 768 2048 4096 8
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timings 12703 144 24 29 0 120 3
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endmode
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mode "1024x768-80"
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geometry 1024 768 2048 4096 8
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timings 11910 144 24 29 0 120 3
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endmode
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mode "1024x768-85"
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geometry 1024 768 2048 4096 8
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timings 11209 144 24 29 0 120 3
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endmode
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mode "1280x1024-50"
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geometry 1280 1024 2048 4096 8
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timings 11114 232 16 39 0 160 3
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endmode
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mode "1280x1024-60"
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geometry 1280 1024 2048 4096 8
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timings 9262 232 16 39 0 160 3
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endmode
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mode "1280x1024-70"
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geometry 1280 1024 2048 4096 8
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timings 7939 232 16 39 0 160 3
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endmode
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mode "1280x1024-72"
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geometry 1280 1024 2048 4096 8
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timings 7719 232 16 39 0 160 3
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endmode
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mode "1280x1024-75"
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geometry 1280 1024 2048 4096 8
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timings 7410 232 16 39 0 160 3
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endmode
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mode "1280x1024-80"
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geometry 1280 1024 2048 4096 8
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timings 6946 232 16 39 0 160 3
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endmode
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mode "1280x1024-85"
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geometry 1280 1024 2048 4096 8
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timings 6538 232 16 39 0 160 3
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endmode
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@ -1,79 +0,0 @@
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Speed
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=====
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CyBlaFB is much faster than tridentfb and vesafb. Compare the performance data
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for mode 1280x1024-[8,16,32]@61 Hz.
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Test 1: Cat a file with 2000 lines of 0 characters.
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Test 2: Cat a file with 2000 lines of 80 characters.
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Test 3: Cat a file with 2000 lines of 160 characters.
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All values show system time use in seconds, kernel 2.6.12 was used for
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the measurements. 2.6.13 is a bit slower, 2.6.14 hopefully will include a
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patch that speeds up kernel bitblitting a lot ( > 20%).
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+-----------+-----------------------------------------------------+
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| | not accelerated |
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| TRIDENTFB +-----------------+-----------------+-----------------+
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| of 2.6.12 | 8 bpp | 16 bpp | 32 bpp |
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| | noypan | ypan | noypan | ypan | noypan | ypan |
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+-----------+--------+--------+--------+--------+--------+--------+
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| Test 1 | 4.31 | 4.33 | 6.05 | 12.81 | ---- | ---- |
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| Test 2 | 67.94 | 5.44 | 123.16 | 14.79 | ---- | ---- |
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| Test 3 | 131.36 | 6.55 | 240.12 | 16.76 | ---- | ---- |
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+-----------+--------+--------+--------+--------+--------+--------+
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| Comments | | | completely bro- |
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| | | | ken, monitor |
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| | | | switches off |
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+-----------+-----------------+-----------------+-----------------+
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+-----------+-----------------------------------------------------+
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| | accelerated |
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| TRIDENTFB +-----------------+-----------------+-----------------+
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| of 2.6.12 | 8 bpp | 16 bpp | 32 bpp |
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| | noypan | ypan | noypan | ypan | noypan | ypan |
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+-----------+--------+--------+--------+--------+--------+--------+
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| Test 1 | ---- | ---- | 20.62 | 1.22 | ---- | ---- |
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| Test 2 | ---- | ---- | 22.61 | 3.19 | ---- | ---- |
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| Test 3 | ---- | ---- | 24.59 | 5.16 | ---- | ---- |
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+-----------+--------+--------+--------+--------+--------+--------+
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| Comments | broken, writing | broken, ok only | completely bro- |
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| | to wrong places | if bgcolor is | ken, monitor |
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| | on screen + bug | black, bug in | switches off |
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| | in fillrect() | fillrect() | |
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+-----------+-----------------+-----------------+-----------------+
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+-----------+-----------------------------------------------------+
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| | not accelerated |
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| VESAFB +-----------------+-----------------+-----------------+
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| of 2.6.12 | 8 bpp | 16 bpp | 32 bpp |
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| | noypan | ypan | noypan | ypan | noypan | ypan |
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+-----------+--------+--------+--------+--------+--------+--------+
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| Test 1 | 4.26 | 3.76 | 5.99 | 7.23 | ---- | ---- |
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| Test 2 | 65.65 | 4.89 | 120.88 | 9.08 | ---- | ---- |
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| Test 3 | 126.91 | 5.94 | 235.77 | 11.03 | ---- | ---- |
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+-----------+--------+--------+--------+--------+--------+--------+
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| Comments | vga=0x307 | vga=0x31a | vga=0x31b not |
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| | fh=80kHz | fh=80kHz | supported by |
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| | fv=75kHz | fv=75kHz | video BIOS and |
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| | | | hardware |
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+-----------+-----------------+-----------------+-----------------+
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+-----------+-----------------------------------------------------+
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| | accelerated |
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| CYBLAFB +-----------------+-----------------+-----------------+
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| | 8 bpp | 16 bpp | 32 bpp |
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| | noypan | ypan | noypan | ypan | noypan | ypan |
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+-----------+--------+--------+--------+--------+--------+--------+
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| Test 1 | 8.02 | 0.23 | 19.04 | 0.61 | 57.12 | 2.74 |
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| Test 2 | 8.38 | 0.55 | 19.39 | 0.92 | 57.54 | 3.13 |
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| Test 3 | 8.73 | 0.86 | 19.74 | 1.24 | 57.95 | 3.51 |
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+-----------+--------+--------+--------+--------+--------+--------+
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| Comments | | | |
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+-----------+-----------------+-----------------+-----------------+
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@ -1,31 +0,0 @@
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TODO / Missing features
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=======================
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Verify LCD stuff "stretch" and "center" options are
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completely untested ... this code needs to be
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verified. As I don't have access to such
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hardware, please contact me if you are
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willing run some tests.
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Interlaced video modes The reason that interleaved
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modes are disabled is that I do not know
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the meaning of the vertical interlace
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parameter. Also the datasheet mentions a
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bit d8 of a horizontal interlace parameter,
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but nowhere the lower 8 bits. Please help
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if you can.
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low-res double scan modes Who needs it?
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accelerated color blitting Who needs it? The console driver does use color
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blitting for nothing but drawing the penguine,
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everything else is done using color expanding
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blitting of 1bpp character bitmaps.
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ioctls Who needs it?
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TV-out Will be done later. Use "vga= " at boot time
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to set a suitable video mode.
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??? Feel free to contact me if you have any
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feature requests
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@ -1,217 +0,0 @@
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CyBlaFB is a framebuffer driver for the Cyberblade/i1 graphics core integrated
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into the VIA Apollo PLE133 (aka vt8601) south bridge. It is developed and
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tested using a VIA EPIA 5000 board.
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Cyblafb - compiled into the kernel or as a module?
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==================================================
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You might compile cyblafb either as a module or compile it permanently into the
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kernel.
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Unless you have a real reason to do so you should not compile both vesafb and
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cyblafb permanently into the kernel. It's possible and it helps during the
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developement cycle, but it's useless and will at least block some otherwise
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usefull memory for ordinary users.
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Selecting Modes
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===============
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Startup Mode
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============
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First of all, you might use the "vga=???" boot parameter as it is
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documented in vesafb.txt and svga.txt. Cyblafb will detect the video
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mode selected and will use the geometry and timings found by
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inspecting the hardware registers.
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video=cyblafb vga=0x317
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Alternatively you might use a combination of the mode, ref and bpp
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parameters. If you compiled the driver into the kernel, add something
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like this to the kernel command line:
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video=cyblafb:1280x1024,bpp=16,ref=50 ...
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If you compiled the driver as a module, the same mode would be
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selected by the following command:
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modprobe cyblafb mode=1280x1024 bpp=16 ref=50 ...
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None of the modes possible to select as startup modes are affected by
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the problems described at the end of the next subsection.
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For all startup modes cyblafb chooses a virtual x resolution of 2048,
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the only exception is mode 1280x1024 in combination with 32 bpp. This
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allows ywrap scrolling for all those modes if rotation is 0 or 2, and
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also fast scrolling if rotation is 1 or 3. The default virtual y reso-
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lution is 4096 for bpp == 8, 2048 for bpp==16 and 1024 for bpp == 32,
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again with the only exception of 1280x1024 at 32 bpp.
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Please do set your video memory size to 8 Mb in the Bios setup. Other
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|
||||||
values will work, but performace is decreased for a lot of modes.
|
|
||||||
|
|
||||||
Mode changes using fbset
|
|
||||||
========================
|
|
||||||
|
|
||||||
You might use fbset to change the video mode, see "man fbset". Cyblafb
|
|
||||||
generally does assume that you know what you are doing. But it does
|
|
||||||
some checks, especially those that are needed to prevent you from
|
|
||||||
damaging your hardware.
|
|
||||||
|
|
||||||
- only 8, 16, 24 and 32 bpp video modes are accepted
|
|
||||||
- interlaced video modes are not accepted
|
|
||||||
- double scan video modes are not accepted
|
|
||||||
- if a flat panel is found, cyblafb does not allow you
|
|
||||||
to program a resolution higher than the physical
|
|
||||||
resolution of the flat panel monitor
|
|
||||||
- cyblafb does not allow vclk to exceed 230 MHz. As 32 bpp
|
|
||||||
and (currently) 24 bit modes use a doubled vclk internally,
|
|
||||||
the dotclock limit as seen by fbset is 115 MHz for those
|
|
||||||
modes and 230 MHz for 8 and 16 bpp modes.
|
|
||||||
- cyblafb will allow you to select very high resolutions as
|
|
||||||
long as the hardware can be programmed to these modes. The
|
|
||||||
documented limit 1600x1200 is not enforced, but don't expect
|
|
||||||
perfect signal quality.
|
|
||||||
|
|
||||||
Any request that violates the rules given above will be either changed
|
|
||||||
to something the hardware supports or an error value will be returned.
|
|
||||||
|
|
||||||
If you program a virtual y resolution higher than the hardware limit,
|
|
||||||
cyblafb will silently decrease that value to the highest possible
|
|
||||||
value. The same is true for a virtual x resolution that is not
|
|
||||||
supported by the hardware. Cyblafb tries to adapt vyres first because
|
|
||||||
vxres decides if ywrap scrolling is possible or not.
|
|
||||||
|
|
||||||
Attempts to disable acceleration are ignored, I believe that this is
|
|
||||||
safe.
|
|
||||||
|
|
||||||
Some video modes that should work do not work as expected. If you use
|
|
||||||
the standard fb.modes, fbset 640x480-60 will program that mode, but
|
|
||||||
you will see a vertical area, about two characters wide, with only
|
|
||||||
much darker characters than the other characters on the screen.
|
|
||||||
Cyblafb does allow that mode to be set, as it does not violate the
|
|
||||||
official specifications. It would need a lot of code to reliably sort
|
|
||||||
out all invalid modes, playing around with the margin values will
|
|
||||||
give a valid mode quickly. And if cyblafb would detect such an invalid
|
|
||||||
mode, should it silently alter the requested values or should it
|
|
||||||
report an error? Both options have some pros and cons. As stated
|
|
||||||
above, none of the startup modes are affected, and if you set
|
|
||||||
verbosity to 1 or higher, cyblafb will print the fbset command that
|
|
||||||
would be needed to program that mode using fbset.
|
|
||||||
|
|
||||||
|
|
||||||
Other Parameters
|
|
||||||
================
|
|
||||||
|
|
||||||
|
|
||||||
crt don't autodetect, assume monitor connected to
|
|
||||||
standard VGA connector
|
|
||||||
|
|
||||||
fp don't autodetect, assume flat panel display
|
|
||||||
connected to flat panel monitor interface
|
|
||||||
|
|
||||||
nativex inform driver about native x resolution of
|
|
||||||
flat panel monitor connected to special
|
|
||||||
interface (should be autodetected)
|
|
||||||
|
|
||||||
stretch stretch image to adapt low resolution modes to
|
|
||||||
higer resolutions of flat panel monitors
|
|
||||||
connected to special interface
|
|
||||||
|
|
||||||
center center image to adapt low resolution modes to
|
|
||||||
higer resolutions of flat panel monitors
|
|
||||||
connected to special interface
|
|
||||||
|
|
||||||
memsize use if autodetected memsize is wrong ...
|
|
||||||
should never be necessary
|
|
||||||
|
|
||||||
nopcirr disable PCI read retry
|
|
||||||
nopciwr disable PCI write retry
|
|
||||||
nopcirb disable PCI read bursts
|
|
||||||
nopciwb disable PCI write bursts
|
|
||||||
|
|
||||||
bpp bpp for specified modes
|
|
||||||
valid values: 8 || 16 || 24 || 32
|
|
||||||
|
|
||||||
ref refresh rate for specified mode
|
|
||||||
valid values: 50 <= ref <= 85
|
|
||||||
|
|
||||||
mode 640x480 or 800x600 or 1024x768 or 1280x1024
|
|
||||||
if not specified, the startup mode will be detected
|
|
||||||
and used, so you might also use the vga=??? parameter
|
|
||||||
described in vesafb.txt. If you do not specify a mode,
|
|
||||||
bpp and ref parameters are ignored.
|
|
||||||
|
|
||||||
verbosity 0 is the default, increase to at least 2 for every
|
|
||||||
bug report!
|
|
||||||
|
|
||||||
Development hints
|
|
||||||
=================
|
|
||||||
|
|
||||||
It's much faster do compile a module and to load the new version after
|
|
||||||
unloading the old module than to compile a new kernel and to reboot. So if you
|
|
||||||
try to work on cyblafb, it might be a good idea to use cyblafb as a module.
|
|
||||||
In real life, fast often means dangerous, and that's also the case here. If
|
|
||||||
you introduce a serious bug when cyblafb is compiled into the kernel, the
|
|
||||||
kernel will lock or oops with a high probability before the file system is
|
|
||||||
mounted, and the danger for your data is low. If you load a broken own version
|
|
||||||
of cyblafb on a running system, the danger for the integrity of the file
|
|
||||||
system is much higher as you might need a hard reset afterwards. Decide
|
|
||||||
yourself.
|
|
||||||
|
|
||||||
Module unloading, the vfb method
|
|
||||||
================================
|
|
||||||
|
|
||||||
If you want to unload/reload cyblafb using the virtual framebuffer, you need
|
|
||||||
to enable vfb support in the kernel first. After that, load the modules as
|
|
||||||
shown below:
|
|
||||||
|
|
||||||
modprobe vfb vfb_enable=1
|
|
||||||
modprobe fbcon
|
|
||||||
modprobe cyblafb
|
|
||||||
fbset -fb /dev/fb1 1280x1024-60 -vyres 2662
|
|
||||||
con2fb /dev/fb1 /dev/tty1
|
|
||||||
...
|
|
||||||
|
|
||||||
If you now made some changes to cyblafb and want to reload it, you might do it
|
|
||||||
as show below:
|
|
||||||
|
|
||||||
con2fb /dev/fb0 /dev/tty1
|
|
||||||
...
|
|
||||||
rmmod cyblafb
|
|
||||||
modprobe cyblafb
|
|
||||||
con2fb /dev/fb1 /dev/tty1
|
|
||||||
...
|
|
||||||
|
|
||||||
Of course, you might choose another mode, and most certainly you also want to
|
|
||||||
map some other /dev/tty* to the real framebuffer device. You might also choose
|
|
||||||
to compile fbcon as a kernel module or place it permanently in the kernel.
|
|
||||||
|
|
||||||
I do not know of any way to unload fbcon, and fbcon will prevent the
|
|
||||||
framebuffer device loaded first from unloading. [If there is a way, then
|
|
||||||
please add a description here!]
|
|
||||||
|
|
||||||
Module unloading, the vesafb method
|
|
||||||
===================================
|
|
||||||
|
|
||||||
Configure the kernel:
|
|
||||||
|
|
||||||
<*> Support for frame buffer devices
|
|
||||||
[*] VESA VGA graphics support
|
|
||||||
<M> Cyberblade/i1 support
|
|
||||||
|
|
||||||
Add e.g. "video=vesafb:ypan vga=0x307" to the kernel parameters. The ypan
|
|
||||||
parameter is important, choose any vga parameter you like as long as it is
|
|
||||||
a graphics mode.
|
|
||||||
|
|
||||||
After booting, load cyblafb without any mode and bpp parameter and assign
|
|
||||||
cyblafb to individual ttys using con2fb, e.g.:
|
|
||||||
|
|
||||||
modprobe cyblafb
|
|
||||||
con2fb /dev/fb1 /dev/tty1
|
|
||||||
|
|
||||||
Unloading cyblafb works without problems after you assign vesafb to all
|
|
||||||
ttys again, e.g.:
|
|
||||||
|
|
||||||
con2fb /dev/fb0 /dev/tty1
|
|
||||||
rmmod cyblafb
|
|
||||||
|
|
@ -1,29 +0,0 @@
|
||||||
0.62
|
|
||||||
====
|
|
||||||
|
|
||||||
- the vesafb parameter has been removed as I decided to allow the
|
|
||||||
feature without any special parameter.
|
|
||||||
|
|
||||||
- Cyblafb does not use the vga style of panning any longer, now the
|
|
||||||
"right view" register in the graphics engine IO space is used. Without
|
|
||||||
that change it was impossible to use all available memory, and without
|
|
||||||
access to all available memory it is impossible to ywrap.
|
|
||||||
|
|
||||||
- The imageblit function now uses hardware acceleration for all font
|
|
||||||
widths. Hardware blitting across pixel column 2048 is broken in the
|
|
||||||
cyberblade/i1 graphics core, but we work around that hardware bug.
|
|
||||||
|
|
||||||
- modes with vxres != xres are supported now.
|
|
||||||
|
|
||||||
- ywrap scrolling is supported now and the default. This is a big
|
|
||||||
performance gain.
|
|
||||||
|
|
||||||
- default video modes use vyres > yres and vxres > xres to allow
|
|
||||||
almost optimal scrolling speed for normal and rotated screens
|
|
||||||
|
|
||||||
- some features mainly usefull for debugging the upper layers of the
|
|
||||||
framebuffer system have been added, have a look at the code
|
|
||||||
|
|
||||||
- fixed: Oops after unloading cyblafb when reading /proc/io*
|
|
||||||
|
|
||||||
- we work around some bugs of the higher framebuffer layers.
|
|
||||||
|
|
@ -1,85 +0,0 @@
|
||||||
I tried the following framebuffer drivers:
|
|
||||||
|
|
||||||
- TRIDENTFB is full of bugs. Acceleration is broken for Blade3D
|
|
||||||
graphics cores like the cyberblade/i1. It claims to support a great
|
|
||||||
number of devices, but documentation for most of these devices is
|
|
||||||
unfortunately not available. There is _no_ reason to use tridentfb
|
|
||||||
for cyberblade/i1 + CRT users. VESAFB is faster, and the one
|
|
||||||
advantage, mode switching, is broken in tridentfb.
|
|
||||||
|
|
||||||
- VESAFB is used by many distributions as a standard. Vesafb does
|
|
||||||
not support mode switching. VESAFB is a bit faster than the working
|
|
||||||
configurations of TRIDENTFB, but it is still too slow, even if you
|
|
||||||
use ypan.
|
|
||||||
|
|
||||||
- EPIAFB (you'll find it on sourceforge) supports the Cyberblade/i1
|
|
||||||
graphics core, but it still has serious bugs and developement seems
|
|
||||||
to have stopped. This is the one driver with TV-out support. If you
|
|
||||||
do need this feature, try epiafb.
|
|
||||||
|
|
||||||
None of these drivers was a real option for me.
|
|
||||||
|
|
||||||
I believe that is unreasonable to change code that announces to support 20
|
|
||||||
devices if I only have more or less sufficient documentation for exactly one
|
|
||||||
of these. The risk of breaking device foo while fixing device bar is too high.
|
|
||||||
|
|
||||||
So I decided to start CyBlaFB as a stripped down tridentfb.
|
|
||||||
|
|
||||||
All code specific to other Trident chips has been removed. After that there
|
|
||||||
were a lot of cosmetic changes to increase the readability of the code. All
|
|
||||||
register names were changed to those mnemonics used in the datasheet. Function
|
|
||||||
and macro names were changed if they hindered easy understanding of the code.
|
|
||||||
|
|
||||||
After that I debugged the code and implemented some new features. I'll try to
|
|
||||||
give a little summary of the main changes:
|
|
||||||
|
|
||||||
- calculation of vertical and horizontal timings was fixed
|
|
||||||
|
|
||||||
- video signal quality has been improved dramatically
|
|
||||||
|
|
||||||
- acceleration:
|
|
||||||
|
|
||||||
- fillrect and copyarea were fixed and reenabled
|
|
||||||
|
|
||||||
- color expanding imageblit was newly implemented, color
|
|
||||||
imageblit (only used to draw the penguine) still uses the
|
|
||||||
generic code.
|
|
||||||
|
|
||||||
- init of the acceleration engine was improved and moved to a
|
|
||||||
place where it really works ...
|
|
||||||
|
|
||||||
- sync function has a timeout now and tries to reset and
|
|
||||||
reinit the accel engine if necessary
|
|
||||||
|
|
||||||
- fewer slow copyarea calls when doing ypan scrolling by using
|
|
||||||
undocumented bit d21 of screen start address stored in
|
|
||||||
CR2B[5]. BIOS does use it also, so this should be safe.
|
|
||||||
|
|
||||||
- cyblafb rejects any attempt to set modes that would cause vclk
|
|
||||||
values above reasonable 230 MHz. 32bit modes use a clock
|
|
||||||
multiplicator of 2, so fbset does show the correct values for
|
|
||||||
pixclock but not for vclk in this case. The fbset limit is 115 MHz
|
|
||||||
for 32 bpp modes.
|
|
||||||
|
|
||||||
- cyblafb rejects modes known to be broken or unimplemented (all
|
|
||||||
interlaced modes, all doublescan modes for now)
|
|
||||||
|
|
||||||
- cyblafb now works independant of the video mode in effect at startup
|
|
||||||
time (tridentfb does not init all needed registers to reasonable
|
|
||||||
values)
|
|
||||||
|
|
||||||
- switching between video modes does work reliably now
|
|
||||||
|
|
||||||
- the first video mode now is the one selected on startup using the
|
|
||||||
vga=???? mechanism or any of
|
|
||||||
- 640x480, 800x600, 1024x768, 1280x1024
|
|
||||||
- 8, 16, 24 or 32 bpp
|
|
||||||
- refresh between 50 Hz and 85 Hz, 1 Hz steps (1280x1024-32
|
|
||||||
is limited to 63Hz)
|
|
||||||
|
|
||||||
- pci retry and pci burst mode are settable (try to disable if you
|
|
||||||
experience latency problems)
|
|
||||||
|
|
||||||
- built as a module cyblafb might be unloaded and reloaded using
|
|
||||||
the vfb module and con2vt or might be used together with vesafb
|
|
||||||
|
|
||||||
|
|
@ -1597,30 +1597,6 @@ config FB_VT8623
|
||||||
Driver for CastleRock integrated graphics core in the
|
Driver for CastleRock integrated graphics core in the
|
||||||
VIA VT8623 [Apollo CLE266] chipset.
|
VIA VT8623 [Apollo CLE266] chipset.
|
||||||
|
|
||||||
config FB_CYBLA
|
|
||||||
tristate "Cyberblade/i1 support"
|
|
||||||
depends on FB && PCI && X86_32 && !64BIT
|
|
||||||
select FB_CFB_IMAGEBLIT
|
|
||||||
---help---
|
|
||||||
This driver is supposed to support the Trident Cyberblade/i1
|
|
||||||
graphics core integrated in the VIA VT8601A North Bridge,
|
|
||||||
also known as VIA Apollo PLE133.
|
|
||||||
|
|
||||||
Status:
|
|
||||||
- Developed, tested and working on EPIA 5000 and EPIA 800.
|
|
||||||
- Does work reliable on all systems with CRT/LCD connected to
|
|
||||||
normal VGA ports.
|
|
||||||
- Should work on systems that do use the internal LCD port, but
|
|
||||||
this is absolutely not tested.
|
|
||||||
|
|
||||||
Character imageblit, copyarea and rectangle fill are hw accelerated,
|
|
||||||
ypan scrolling is used by default.
|
|
||||||
|
|
||||||
Please do read <file:Documentation/fb/cyblafb/*>.
|
|
||||||
|
|
||||||
To compile this driver as a module, choose M here: the
|
|
||||||
module will be called cyblafb.
|
|
||||||
|
|
||||||
config FB_TRIDENT
|
config FB_TRIDENT
|
||||||
tristate "Trident support"
|
tristate "Trident support"
|
||||||
depends on FB && PCI
|
depends on FB && PCI
|
||||||
|
|
@ -1633,8 +1609,8 @@ config FB_TRIDENT
|
||||||
and Blade XP.
|
and Blade XP.
|
||||||
There are also integrated versions of these chips called CyberXXXX,
|
There are also integrated versions of these chips called CyberXXXX,
|
||||||
CyberImage or CyberBlade. These chips are mostly found in laptops
|
CyberImage or CyberBlade. These chips are mostly found in laptops
|
||||||
but also on some motherboards. For more information, read
|
but also on some motherboards including early VIA EPIA motherboards.
|
||||||
<file:Documentation/fb/tridentfb.txt>
|
For more information, read <file:Documentation/fb/tridentfb.txt>
|
||||||
|
|
||||||
Say Y if you have such a graphics board.
|
Say Y if you have such a graphics board.
|
||||||
|
|
||||||
|
|
|
||||||
File diff suppressed because it is too large
Load Diff
|
|
@ -2,7 +2,7 @@
|
||||||
* Frame buffer driver for Trident TGUI, Blade and Image series
|
* Frame buffer driver for Trident TGUI, Blade and Image series
|
||||||
*
|
*
|
||||||
* Copyright 2001, 2002 - Jani Monoses <jani@iv.ro>
|
* Copyright 2001, 2002 - Jani Monoses <jani@iv.ro>
|
||||||
*
|
* Copyright 2009 Krzysztof Helt <krzysztof.h1@wp.pl>
|
||||||
*
|
*
|
||||||
* CREDITS:(in order of appearance)
|
* CREDITS:(in order of appearance)
|
||||||
* skeletonfb.c by Geert Uytterhoeven and other fb code in drivers/video
|
* skeletonfb.c by Geert Uytterhoeven and other fb code in drivers/video
|
||||||
|
|
@ -1490,6 +1490,9 @@ static int __devinit trident_pci_probe(struct pci_dev *dev,
|
||||||
} else
|
} else
|
||||||
info->flags |= FBINFO_HWACCEL_DISABLED;
|
info->flags |= FBINFO_HWACCEL_DISABLED;
|
||||||
|
|
||||||
|
if (is_blade(chip_id) && chip_id != BLADE3D)
|
||||||
|
info->flags |= FBINFO_READS_FAST;
|
||||||
|
|
||||||
info->pixmap.addr = kmalloc(4096, GFP_KERNEL);
|
info->pixmap.addr = kmalloc(4096, GFP_KERNEL);
|
||||||
if (!info->pixmap.addr) {
|
if (!info->pixmap.addr) {
|
||||||
err = -ENOMEM;
|
err = -ENOMEM;
|
||||||
|
|
@ -1664,4 +1667,5 @@ module_exit(tridentfb_exit);
|
||||||
MODULE_AUTHOR("Jani Monoses <jani@iv.ro>");
|
MODULE_AUTHOR("Jani Monoses <jani@iv.ro>");
|
||||||
MODULE_DESCRIPTION("Framebuffer driver for Trident cards");
|
MODULE_DESCRIPTION("Framebuffer driver for Trident cards");
|
||||||
MODULE_LICENSE("GPL");
|
MODULE_LICENSE("GPL");
|
||||||
|
MODULE_ALIAS("cyblafb");
|
||||||
|
|
||||||
|
|
|
||||||
Loading…
Reference in New Issue