[PATCH] framebuffer: new driver for cyberblade/i1 graphics core

This is a framebuffer driver for the Cyberblade/i1 graphics core.

Currently tridenfb claims to support the cyberblade/i1 graphics core.  This
is of very limited truth.  Even vesafb is faster and provides more working
modes and a much better quality of the video signal.  There is a great
number of bugs in tridentfb ...  but most often it is impossible to decide
if these bugs are real bugs or if fixing them for the cyberblade/i1 core
would break support for one of the other supported chips.

Tridentfb seems to be unmaintained,and documentation for most of the
supported chips is not available.  So "fixing" cyberblade/i1 support inside
of tridentfb was not an option, it would have caused numerous
if(CYBERBLADEi1) else ...  cases and would have rendered the code to be
almost unmaintainable.

A first version of this driver was published on 2005-07-31.  A fix for a
bug reported by Jochen Hein was integrated as well as some changes
requested by Antonino A.  Daplas.

A message has been added to tridentfb to inform current users of tridentfb
to switch to cyblafb if the cyberblade/i1 graphics core is detected.

This patch is one logical change, but because of the included documentation
it is bigger than 70kb.  Therefore it is not sent to lkml and
linux-fbdev-devel,

Signed-off-by: Knut Petersen <[email protected]>
Cc: Muli Ben-Yehuda <[email protected]>
Acked-by: Antonino Daplas <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

drivers/video/Kconfig

@@ -1177,6 +1177,32 @@ config FB_VOODOO1
 	  Please read the <file:Documentation/fb/README-sstfb.txt> for supported
 	  options and other important info  support.
 
+config FB_CYBLA
+	tristate "Cyberblade/i1 support"
+	depends on FB && PCI
+	select FB_CFB_IMAGEBLIT
+	select FB_SOFT_CURSOR
+	select VIDEO_SELECT
+	---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
 	tristate "Trident support"
 	depends on FB && PCI
@@ -1190,8 +1216,12 @@ config FB_TRIDENT
 	  but also on some motherboards. For more information, read
 	  <file:Documentation/fb/tridentfb.txt>
 
+	  Cyberblade/i1 support will be removed soon, use the cyblafb driver
+	  instead.
+
 	  Say Y if you have such a graphics board.
 
+
 	  To compile this driver as a module, choose M here: the
 	  module will be called tridentfb.
 
@@ -1202,7 +1232,6 @@ config FB_TRIDENT_ACCEL
 	This will compile the Trident frame buffer device with
 	acceleration functions.
 
-
 config FB_PM3
 	tristate "Permedia3 support"
 	depends on FB && PCI && BROKEN

drivers/video/Makefile

@@ -50,7 +50,8 @@ obj-$(CONFIG_FB_CT65550)          += chipsfb.o
 obj-$(CONFIG_FB_IMSTT)            += imsttfb.o
 obj-$(CONFIG_FB_S3TRIO)           += S3triofb.o
 obj-$(CONFIG_FB_FM2)              += fm2fb.o
-obj-$(CONFIG_FB_TRIDENT)	  += tridentfb.o
+obj-$(CONFIG_FB_CYBLA)            += cyblafb.o
+obj-$(CONFIG_FB_TRIDENT)          += tridentfb.o
 obj-$(CONFIG_FB_STI)              += stifb.o
 obj-$(CONFIG_FB_FFB)              += ffb.o sbuslib.o
 obj-$(CONFIG_FB_CG6)              += cg6.o sbuslib.o

drivers/video/tridentfb.c

@@ -1061,6 +1061,11 @@ static int __devinit trident_pci_probe(struct pci_dev * dev, const struct pci_de
 
 	chip_id = id->device;
 
+	if(chip_id == CYBERBLADEi1)
+		output("*** Please do use cyblafb, Cyberblade/i1 support "
+		       "will soon be removed from tridentfb!\n");
+
+
 	/* If PCI id is 0x9660 then further detect chip type */
 	
 	if (chip_id == TGUI9660) {