cirrusfb: add imageblit function

Add hardware color expansion (imageblit) function.  It roughly doubles
scrolling speed of my Alpine card (GD5430).

Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 46 insertions, 18 deletions

diff --git a/drivers/video/cirrusfb.c b/drivers/video/cirrusfb.c
index e4ac2f6d4d97..a2a09b39c59a 100644
--- a/drivers/video/cirrusfb.c
+++ b/drivers/video/cirrusfb.c
@@ -381,7 +381,8 @@ static void cirrusfb_BitBLT(u8 __iomem *regbase, int bits_per_pixel,
 static void cirrusfb_RectFill(u8 __iomem *regbase, int bits_per_pixel,
                               u_short x, u_short y,
                               u_short width, u_short height,
-                              u32 color, u_short line_length);
+                              u32 fg_color, u32 bg_color,
+                              u_short line_length, u_char blitmode);
 
 static void bestclock(long freq, int *nom, int *den, int *div);
 
@@ -1790,8 +1791,8 @@ static void cirrusfb_fillrect(struct fb_info *info,
                           info->var.bits_per_pixel,
                           (region->dx * m) / 8, region->dy,
                           (region->width * m) / 8, region->height,
-                          color,
-                          info->fix.line_length);
+                          color, color,
+                          info->fix.line_length, 0x40);
 }
 
 static void cirrusfb_copyarea(struct fb_info *info,
@@ -1840,9 +1841,33 @@ static void cirrusfb_imageblit(struct fb_info *info,
 {
         struct cirrusfb_info *cinfo = info->par;
 
-        if (!is_laguna(cinfo))
+        if (info->state != FBINFO_STATE_RUNNING)
+                return;
+        if (info->flags & FBINFO_HWACCEL_DISABLED)
+                cfb_imageblit(info, image);
+        else {
+                unsigned size = ((image->width + 7) >> 3) * image->height;
+                int m = info->var.bits_per_pixel;
+                u32 fg, bg;
+
+                if (info->var.bits_per_pixel == 8) {
+                        fg = image->fg_color;
+                        bg = image->bg_color;
+                } else {
+                        fg = ((u32 *)(info->pseudo_palette))[image->fg_color];
+                        bg = ((u32 *)(info->pseudo_palette))[image->bg_color];
+                }
                 cirrusfb_WaitBLT(cinfo->regbase);
-        cfb_imageblit(info, image);
+                /* byte rounded scanlines */
+                vga_wgfx(cinfo->regbase, CL_GR33, 0x00);
+                cirrusfb_RectFill(cinfo->regbase,
+                                  info->var.bits_per_pixel,
+                                  (image->dx * m) / 8, image->dy,
+                                  (image->width * m) / 8, image->height,
+                                  fg, bg,
+                                  info->fix.line_length, 0x04);
+                memcpy(info->screen_base, image->data, size);
+        }
 }
 
 #ifdef CONFIG_PPC_PREP
@@ -1988,10 +2013,12 @@ static int __devinit cirrusfb_set_fbinfo(struct fb_info *info)
                     | FBINFO_HWACCEL_XPAN
                     | FBINFO_HWACCEL_YPAN
                     | FBINFO_HWACCEL_FILLRECT
+                    | FBINFO_HWACCEL_IMAGEBLIT
                     | FBINFO_HWACCEL_COPYAREA;
         if (noaccel || is_laguna(cinfo))
                 info->flags |= FBINFO_HWACCEL_DISABLED;
         info->fbops = &cirrusfb_ops;
+
         if (cinfo->btype == BT_GD5480) {
                 if (var->bits_per_pixel == 16)
                         info->screen_base += 1 * MB_;
@@ -2711,7 +2738,8 @@ static void cirrusfb_BitBLT(u8 __iomem *regbase, int bits_per_pixel,
 
 static void cirrusfb_RectFill(u8 __iomem *regbase, int bits_per_pixel,
                      u_short x, u_short y, u_short width, u_short height,
-                     u32 color, u_short line_length)
+                     u32 fg_color, u32 bg_color, u_short line_length,
+                     u_char blitmode)
 {
         u_long ndest = (y * line_length) + x;
         u_char op;
@@ -2720,24 +2748,24 @@ static void cirrusfb_RectFill(u8 __iomem *regbase, int bits_per_pixel,
 
         /* This is a ColorExpand Blt, using the */
         /* same color for foreground and background */
-        vga_wgfx(regbase, VGA_GFX_SR_VALUE, color);     /* foreground color */
-        vga_wgfx(regbase, VGA_GFX_SR_ENABLE, color);    /* background color */
+        vga_wgfx(regbase, VGA_GFX_SR_VALUE, bg_color);
+        vga_wgfx(regbase, VGA_GFX_SR_ENABLE, fg_color);
 
-        op = 0xc0;
+        op = 0x80;
         if (bits_per_pixel >= 16) {
-                vga_wgfx(regbase, CL_GR10, color >> 8); /* foreground color */
-                vga_wgfx(regbase, CL_GR11, color >> 8); /* background color */
-                op = 0xd0;
+                vga_wgfx(regbase, CL_GR10, bg_color >> 8);
+                vga_wgfx(regbase, CL_GR11, fg_color >> 8);
+                op = 0x90;
         }
         if (bits_per_pixel == 32) {
-                vga_wgfx(regbase, CL_GR12, color >> 16);/* foreground color */
-                vga_wgfx(regbase, CL_GR13, color >> 16);/* background color */
-                vga_wgfx(regbase, CL_GR14, color >> 24);/* foreground color */
-                vga_wgfx(regbase, CL_GR15, color >> 24);/* background color */
-                op = 0xf0;
+                vga_wgfx(regbase, CL_GR12, bg_color >> 16);
+                vga_wgfx(regbase, CL_GR13, fg_color >> 16);
+                vga_wgfx(regbase, CL_GR14, bg_color >> 24);
+                vga_wgfx(regbase, CL_GR15, fg_color >> 24);
+                op = 0xb0;
         }
         cirrusfb_set_blitter(regbase, width - 1, height - 1,
-                            0, ndest, op, line_length);
+                            0, ndest, op | blitmode, line_length);
 }
 
 /**************************************************************************