vt8623fb: new framebuffer driver for VIA VT8623

This patch adds fbdev driver for graphics core in VIA VT8623

[adaplas@gmail.com: build fixes]
Signed-off-by: Ondrej Zajicek <santiago@crfreenet.org>
Signed-off-by: Antonino Daplas <adaplas@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/Documentation/fb/vt8623fb.txt b/Documentation/fb/vt8623fb.txt
new file mode 100644 (file)
index 0000000..f654576
--- /dev/null
+++ b/Documentation/fb/vt8623fb.txt
@@ -0,0 +1,64 @@
+
+       vt8623fb - fbdev driver for graphics core in VIA VT8623 chipset
+       ===============================================================
+
+
+Supported Hardware
+==================
+
+       VIA VT8623 [CLE266] chipset and its graphics core
+               (known as CastleRock or Unichrome)
+
+I tested vt8623fb on VIA EPIA ML-6000
+
+
+Supported Features
+==================
+
+       *  4 bpp pseudocolor modes (with 18bit palette, two variants)
+       *  8 bpp pseudocolor mode (with 18bit palette)
+       * 16 bpp truecolor mode (RGB 565)
+       * 32 bpp truecolor mode (RGB 888)
+       * text mode (activated by bpp = 0)
+       * doublescan mode variant (not available in text mode)
+       * panning in both directions
+       * suspend/resume support
+       * DPMS support
+
+Text mode is supported even in higher resolutions, but there is limitation to
+lower pixclocks (maximum about 100 MHz). This limitation is not enforced by
+driver. Text mode supports 8bit wide fonts only (hardware limitation) and
+16bit tall fonts (driver limitation).
+
+There are two 4 bpp modes. First mode (selected if nonstd == 0) is mode with
+packed pixels, high nibble first. Second mode (selected if nonstd == 1) is mode
+with interleaved planes (1 byte interleave), MSB first. Both modes support
+8bit wide fonts only (driver limitation).
+
+Suspend/resume works on systems that initialize video card during resume and
+if device is active (for example used by fbcon).
+
+
+Missing Features
+================
+(alias TODO list)
+
+       * secondary (not initialized by BIOS) device support
+       * MMIO support
+       * interlaced mode variant
+       * support for fontwidths != 8 in 4 bpp modes
+       * support for fontheight != 16 in text mode
+       * hardware cursor
+       * video overlay support
+       * vsync synchronization
+       * acceleration support (8514-like 2D, busmaster transfers)
+
+
+Known bugs
+==========
+
+       * cursor disable in text mode doesn't work
+
+
+--
+Ondrej Zajicek <santiago@crfreenet.org>

diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
index 1132ba5..7e5010d 100644 (file)
--- a/drivers/video/Kconfig
+++ b/drivers/video/Kconfig
@@ -1348,6 +1348,20 @@ config FB_VOODOO1
          Please read the <file:Documentation/fb/README-sstfb.txt> for supported
          options and other important info  support.
 
+config FB_VT8623
+       tristate "VIA VT8623 support"
+       depends on FB && PCI
+       select FB_CFB_FILLRECT
+       select FB_CFB_COPYAREA
+       select FB_CFB_IMAGEBLIT
+       select FB_TILEBLITTING
+       select FB_SVGALIB
+       select VGASTATE
+       select FONT_8x16 if FRAMEBUFFER_CONSOLE
+       ---help---
+         Driver for CastleRock integrated graphics core in the
+         VIA VT8623 [Apollo CLE266] chipset.
+
 config FB_CYBLA
        tristate "Cyberblade/i1 support"
        depends on FB && PCI && X86_32 && !64BIT

diff --git a/drivers/video/Makefile b/drivers/video/Makefile
index a916c20..c0c6146 100644 (file)
--- a/drivers/video/Makefile
+++ b/drivers/video/Makefile
@@ -54,6 +54,7 @@ obj-$(CONFIG_FB_VALKYRIE)         += valkyriefb.o
 obj-$(CONFIG_FB_CT65550)          += chipsfb.o
 obj-$(CONFIG_FB_IMSTT)            += imsttfb.o
 obj-$(CONFIG_FB_FM2)              += fm2fb.o
+obj-$(CONFIG_FB_VT8623)           += vt8623fb.o
 obj-$(CONFIG_FB_CYBLA)            += cyblafb.o
 obj-$(CONFIG_FB_TRIDENT)          += tridentfb.o
 obj-$(CONFIG_FB_LE80578)          += vermilion/

diff --cc drivers/video/vt8623fb.c
Simple merge