fbdev: visfxfb: HP Visualize-FX framebufffer driver

A framebuffer driver for HP's Visualize-FX series of cards. The aim is
to support all FX2 - FX10 types but currently only FX5 is tested.

This driver is an updated version of the one which Sven Schnelle
originally posted here:
https://lore.kernel.org/all/20211031195347.13754-1-svens@stackframe.org/

Additional changes:
- added support for 32bpp
- added copyarea to bitblt from screen to screen
- allows screen sizes of up to 1920x1600 pixel
- lots of minor fixes (and probably new bugs)

This driver is still under development, nevertheless it would be great if
people could test.
This driver will not work on FX-10 cards yet.

Signed-off-by: Sven Schnelle <svens@stackframe.org>
Signed-off-by: Helge Deller <deller@gmx.de>

arch/parisc/include/asm/fb.h

@@ -12,7 +12,7 @@ static inline void fb_pgprotect(struct file *file, struct vm_area_struct *vma,
 	pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE;
 }
 
-#if defined(CONFIG_FB_STI)
+#if defined(CONFIG_FB_STI) || defined(FB_VISUALIZEFX)
 int fb_is_primary_device(struct fb_info *info);
 #else
 static inline int fb_is_primary_device(struct fb_info *info)

drivers/video/console/sticore.c

@@ -1148,7 +1148,7 @@ int sti_call(const struct sti_struct *sti, unsigned long func,
 	return ret;
 }
 
-#if defined(CONFIG_FB_STI)
+#if defined(CONFIG_FB_STI) || defined(FB_VISUALIZEFX)
 /* check if given fb_info is the primary device */
 int fb_is_primary_device(struct fb_info *info)
 {

drivers/video/fbdev/Kconfig

@@ -568,6 +568,18 @@ config FB_STI
 
 	  It is safe to enable this option, so you should probably say "Y".
 
+config FB_VISUALIZEFX
+	tristate "HP Visualize FX support"
+	depends on FB && PCI && PARISC
+	select RATIONAL
+	select FB_CFB_IMAGEBLIT
+	  help
+	    Frame buffer driver for the HP Visualize FX cards. These cards are
+	    commonly found in PA-RISC workstations. Currently only FX5 has been
+	    tested.
+
+	    Say Y if you have such a card.
+
 config FB_MAC
 	bool "Generic Macintosh display support"
 	depends on (FB = y) && MAC

drivers/video/fbdev/Makefile

@@ -129,6 +129,6 @@ obj-$(CONFIG_FB_MX3)		  += mx3fb.o
 obj-$(CONFIG_FB_DA8XX)		  += da8xx-fb.o
 obj-$(CONFIG_FB_SSD1307)	  += ssd1307fb.o
 obj-$(CONFIG_FB_SIMPLE)           += simplefb.o
-
+obj-$(CONFIG_FB_VISUALIZEFX)	  += visfxfb.o
 # the test framebuffer is last
 obj-$(CONFIG_FB_VIRTUAL)          += vfb.o