[PATCH] Update cyblafb driver

This is a major update to the cyblafb framebuffer driver. Most
of the stuff has been tested in the mm tree.

Main advantages:
============
  - vxres > xres support
  - ywrap and xpan support
  - much faster for almost all modes (e.g. 1280x1024-16bpp
     draws more than 41 full screens of text instead of about 25
     full screens of text per second on authors Epia 5000)
  - module init/exit code fixed
  - bugs triggered by console rotation fixed
  - lots of minor improvements
  - startup modes suitable for high performance scrolling
     in all directions

This diff  also contains a lot of white space fixes.

No side effects are possible, only one single graphics core is affected.

Signed-off-by: Knut Petersen <Knut_Petersen@t-online.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

6 files changed, 81 insertions, 45 deletions

diff --git a/Documentation/fb/cyblafb/bugs b/Documentation/fb/cyblafb/bugs
index f90cc66ea919..9443a6d72cdd 100644
--- a/Documentation/fb/cyblafb/bugs
+++ b/Documentation/fb/cyblafb/bugs
@@ -11,4 +11,3 @@ Untested features
 
 All LCD stuff is untested. If it worked in tridentfb, it should work in
 cyblafb. Please test and report the results to Knut_Petersen@t-online.de.
-
diff --git a/Documentation/fb/cyblafb/fb.modes b/Documentation/fb/cyblafb/fb.modes
index cf4351fc32ff..fe0e5223ba86 100644
--- a/Documentation/fb/cyblafb/fb.modes
+++ b/Documentation/fb/cyblafb/fb.modes
@@ -14,142 +14,141 @@
 #
 
 mode "640x480-50"
-    geometry 640 480 640 3756 8
+    geometry 640 480 2048 4096 8
     timings 47619 4294967256 24 17 0 216 3
 endmode
 
 mode "640x480-60"
-    geometry 640 480 640 3756 8
+    geometry 640 480 2048 4096 8
     timings 39682 4294967256 24 17 0 216 3
 endmode
 
 mode "640x480-70"
-    geometry 640 480 640 3756 8
+    geometry 640 480 2048 4096 8
     timings 34013 4294967256 24 17 0 216 3
 endmode
 
 mode "640x480-72"
-    geometry 640 480 640 3756 8
+    geometry 640 480 2048 4096 8
     timings 33068 4294967256 24 17 0 216 3
 endmode
 
 mode "640x480-75"
-    geometry 640 480 640 3756 8
+    geometry 640 480 2048 4096 8
     timings 31746 4294967256 24 17 0 216 3
 endmode
 
 mode "640x480-80"
-    geometry 640 480 640 3756 8
+    geometry 640 480 2048 4096 8
     timings 29761 4294967256 24 17 0 216 3
 endmode
 
 mode "640x480-85"
-    geometry 640 480 640 3756 8
+    geometry 640 480 2048 4096 8
     timings 28011 4294967256 24 17 0 216 3
 endmode
 
 mode "800x600-50"
-    geometry 800 600 800 3221 8
+    geometry 800 600 2048 4096 8
     timings 30303 96 24 14 0 136 11
 endmode
 
 mode "800x600-60"
-    geometry 800 600 800 3221 8
+    geometry 800 600 2048 4096 8
     timings 25252 96 24 14 0 136 11
 endmode
 
 mode "800x600-70"
-    geometry 800 600 800 3221 8
+    geometry 800 600 2048 4096 8
     timings 21645 96 24 14 0 136 11
 endmode
 
 mode "800x600-72"
-    geometry 800 600 800 3221 8
+    geometry 800 600 2048 4096 8
     timings 21043 96 24 14 0 136 11
 endmode
 
 mode "800x600-75"
-    geometry 800 600 800 3221 8
+    geometry 800 600 2048 4096 8
     timings 20202 96 24 14 0 136 11
 endmode
 
 mode "800x600-80"
-    geometry 800 600 800 3221 8
+    geometry 800 600 2048 4096 8
     timings 18939 96 24 14 0 136 11
 endmode
 
 mode "800x600-85"
-    geometry 800 600 800 3221 8
+    geometry 800 600 2048 4096 8
     timings 17825 96 24 14 0 136 11
 endmode
 
 mode "1024x768-50"
-    geometry 1024 768 1024 2815 8
+    geometry 1024 768 2048 4096 8
     timings 19054 144 24 29 0 120 3
 endmode
 
 mode "1024x768-60"
-    geometry 1024 768 1024 2815 8
+    geometry 1024 768 2048 4096 8
     timings 15880 144 24 29 0 120 3
 endmode
 
 mode "1024x768-70"
-    geometry 1024 768 1024 2815 8
+    geometry 1024 768 2048 4096 8
     timings 13610 144 24 29 0 120 3
 endmode
 
 mode "1024x768-72"
-    geometry 1024 768 1024 2815 8
+    geometry 1024 768 2048 4096 8
     timings 13232 144 24 29 0 120 3
 endmode
 
 mode "1024x768-75"
-    geometry 1024 768 1024 2815 8
+    geometry 1024 768 2048 4096 8
     timings 12703 144 24 29 0 120 3
 endmode
 
 mode "1024x768-80"
-    geometry 1024 768 1024 2815 8
+    geometry 1024 768 2048 4096 8
     timings 11910 144 24 29 0 120 3
 endmode
 
 mode "1024x768-85"
-    geometry 1024 768 1024 2815 8
+    geometry 1024 768 2048 4096 8
     timings 11209 144 24 29 0 120 3
 endmode
 
 mode "1280x1024-50"
-    geometry 1280 1024 1280 2662 8
+    geometry 1280 1024 2048 4096 8
     timings 11114 232 16 39 0 160 3
 endmode
 
 mode "1280x1024-60"
-    geometry 1280 1024 1280 2662 8
+    geometry 1280 1024 2048 4096 8
     timings 9262 232 16 39 0 160 3
 endmode
 
 mode "1280x1024-70"
-    geometry 1280 1024 1280 2662 8
+    geometry 1280 1024 2048 4096 8
     timings 7939 232 16 39 0 160 3
 endmode
 
 mode "1280x1024-72"
-    geometry 1280 1024 1280 2662 8
+    geometry 1280 1024 2048 4096 8
     timings 7719 232 16 39 0 160 3
 endmode
 
 mode "1280x1024-75"
-    geometry 1280 1024 1280 2662 8
+    geometry 1280 1024 2048 4096 8
     timings 7410 232 16 39 0 160 3
 endmode
 
 mode "1280x1024-80"
-    geometry 1280 1024 1280 2662 8
+    geometry 1280 1024 2048 4096 8
     timings 6946 232 16 39 0 160 3
 endmode
 
 mode "1280x1024-85"
-    geometry 1280 1024 1280 2662 8
+    geometry 1280 1024 2048 4096 8
     timings 6538 232 16 39 0 160 3
 endmode
-
diff --git a/Documentation/fb/cyblafb/performance b/Documentation/fb/cyblafb/performance
index eb4e47a9cea6..8d15d5dfc6b3 100644
--- a/Documentation/fb/cyblafb/performance
+++ b/Documentation/fb/cyblafb/performance
@@ -77,4 +77,3 @@ patch that speeds up kernel bitblitting a lot ( > 20%).
 |           |                 |                 |                 |
 |           |                 |                 |                 |
 +-----------+-----------------+-----------------+-----------------+
-
diff --git a/Documentation/fb/cyblafb/todo b/Documentation/fb/cyblafb/todo
index 80fb2f89b6c1..c5f6d0eae545 100644
--- a/Documentation/fb/cyblafb/todo
+++ b/Documentation/fb/cyblafb/todo
@@ -22,11 +22,10 @@ accelerated color blitting	Who needs it? The console driver does use color
                                 everything else is done using color expanding
                                 blitting of 1bpp character bitmaps.
 
-xpanning                        Who needs it?
-
 ioctls                          Who needs it?
 
-TV-out                          Will be done later
+TV-out                          Will be done later. Use "vga= " at boot time
+                                to set a suitable video mode.
 
 ???                             Feel free to contact me if you have any
                                 feature requests
diff --git a/Documentation/fb/cyblafb/usage b/Documentation/fb/cyblafb/usage
index e627c8f54211..a39bb3d402a2 100644
--- a/Documentation/fb/cyblafb/usage
+++ b/Documentation/fb/cyblafb/usage
@@ -40,6 +40,16 @@ Selecting Modes
         None of the modes possible to select as startup modes are affected by
         the problems described at the end of the next subsection.
 
+        For all startup modes cyblafb chooses a virtual x resolution of 2048,
+        the only exception is mode 1280x1024 in combination with 32 bpp. This
+        allows ywrap scrolling for all those modes if rotation is 0 or 2, and
+        also fast scrolling if rotation is 1 or 3. The default virtual y reso-
+        lution is 4096 for bpp == 8, 2048 for bpp==16 and 1024 for bpp == 32,
+        again with the only exception of 1280x1024 at 32 bpp.
+
+        Please do set your video memory size to 8 Mb in the Bios setup. Other
+        values will work, but performace is decreased for a lot of modes.
+
         Mode changes using fbset
         ========================
 
@@ -54,20 +64,26 @@ Selecting Modes
                 - 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 xres to differ from xres_virtual
                 - 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 ignored and
-        fbset will return an error.
+        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.
+        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.
+        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
@@ -129,10 +145,6 @@ mode		640x480 or 800x600 or 1024x768 or 1280x1024
 verbosity       0 is the default, increase to at least 2 for every
                 bug report!
 
-vesafb          allows cyblafb to be loaded after vesafb has been
-                loaded. See sections "Module unloading ...".
-
-
 Development hints
 =================
 
@@ -195,7 +207,7 @@ 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 vesafb=1
+        modprobe cyblafb
         con2fb /dev/fb1 /dev/tty1
 
 Unloading cyblafb works without problems after you assign vesafb to all
@@ -203,4 +215,3 @@ ttys again, e.g.:
 
         con2fb /dev/fb0 /dev/tty1
         rmmod cyblafb
-
diff --git a/Documentation/fb/cyblafb/whatsnew b/Documentation/fb/cyblafb/whatsnew
new file mode 100644
index 000000000000..76c07a26e044
--- /dev/null
+++ b/Documentation/fb/cyblafb/whatsnew
@@ -0,0 +1,29 @@
+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.