summaryrefslogtreecommitdiffstats
path: root/Documentation/fb/tridentfb.rst
diff options
context:
space:
mode:
authorSven Schnelle <svens@linux.ibm.com>2026-09-09 11:29:53 +0200
committerMasami Hiramatsu (Google) <mhiramat@kernel.org>2026-09-10 08:43:35 +0900
commitd22c3e0088e85be8131f7a9283f759cdbb20726d (patch)
tree9668df2aa27b26f850d3ba5ba1287e443803675c /Documentation/fb/tridentfb.rst
downloadlinux-stable-d22c3e0088e85be8131f7a9283f759cdbb20726d.tar.gz
linux-stable-d22c3e0088e85be8131f7a9283f759cdbb20726d.zip
selftests/ftrace: Fix unique symbol check in kprobe_non_uniq_symbol.tcgrafted
The current regex also matches symbols in modules, which makes the test fail on s390 where name_show is present only once in the kernel, but also multiple times in modules: 000001b1401cdc20 t name_show 000001b0c05e6c40 t name_show [mdev] 000001b0c0495f30 t name_show [i2c_core] Fix this by changing the regular expression to only match the function name. Link: https://lore.kernel.org/all/20260909092954.2200558-1-svens@linux.ibm.com/ Fixes: 03b80ff8023a ("selftests/ftrace: Add new test case which checks non unique symbol") Signed-off-by: Sven Schnelle <svens@linux.ibm.com> Reviewed-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Diffstat (limited to 'Documentation/fb/tridentfb.rst')
-rw-r--r--Documentation/fb/tridentfb.rst78
1 files changed, 78 insertions, 0 deletions
diff --git a/Documentation/fb/tridentfb.rst b/Documentation/fb/tridentfb.rst
new file mode 100644
index 000000000..7921c9dee
--- /dev/null
+++ b/Documentation/fb/tridentfb.rst
@@ -0,0 +1,78 @@
+=========
+Tridentfb
+=========
+
+Tridentfb is a framebuffer driver for some Trident chip based cards.
+
+The following list of chips is thought to be supported although not all are
+tested:
+
+those from the TGUI series 9440/96XX and with Cyber in their names
+those from the Image series and with Cyber in their names
+those with Blade in their names (Blade3D,CyberBlade...)
+the newer CyberBladeXP family
+
+All families are accelerated. Only PCI/AGP based cards are supported,
+none of the older Tridents.
+The driver supports 8, 16 and 32 bits per pixel depths.
+The TGUI family requires a line length to be power of 2 if acceleration
+is enabled. This means that range of possible resolutions and bpp is
+limited comparing to the range if acceleration is disabled (see list
+of parameters below).
+
+Known bugs:
+
+1. The driver randomly locks up on 3DImage975 chip with acceleration
+ enabled. The same happens in X11 (Xorg).
+2. The ramdac speeds require some more fine tuning. It is possible to
+ switch resolution which the chip does not support at some depths for
+ older chips.
+
+How to use it?
+==============
+
+When booting you can pass the video parameter::
+
+ video=tridentfb
+
+The parameters for tridentfb are concatenated with a ':' as in this example::
+
+ video=tridentfb:800x600-16@75,noaccel
+
+The second level parameters that tridentfb understands are:
+
+======== =====================================================================
+noaccel turns off acceleration (when it doesn't work for your card)
+
+fp use flat panel related stuff
+crt assume monitor is present instead of fp
+
+center for flat panels and resolutions smaller than native size center the
+ image, otherwise use
+stretch
+
+memsize integer value in KB, use if your card's memory size is misdetected.
+ look at the driver output to see what it says when initializing.
+
+memdiff integer value in KB, should be nonzero if your card reports
+ more memory than it actually has. For instance mine is 192K less than
+ detection says in all three BIOS selectable situations 2M, 4M, 8M.
+ Only use if your video memory is taken from main memory hence of
+ configurable size. Otherwise use memsize.
+ If in some modes which barely fit the memory you see garbage
+ at the bottom this might help by not letting change to that mode
+ anymore.
+
+nativex the width in pixels of the flat panel.If you know it (usually 1024
+ 800 or 1280) and it is not what the driver seems to detect use it.
+
+bpp bits per pixel (8,16 or 32)
+mode a mode name like 800x600-8@75 as described in
+ Documentation/fb/modedb.rst
+======== =====================================================================
+
+Using insane values for the above parameters will probably result in driver
+misbehaviour so take care(for instance memsize=12345678 or memdiff=23784 or
+nativex=93)
+
+Contact: jani@astechnix.ro