stifb: Implement hardware accelerated copyarea

This patch adds hardware assisted scrolling. The code is based upon the
following investigation: https://parisc.wiki.kernel.org/index.php/NGLE#Blitter

A simple 'time ls -la /usr/bin' test shows 1.6x speed increase over soft
copy and 2.3x increase over FBINFO_READS_FAST (prefer soft copy over
screen redraw) on Artist framebuffer.

Signed-off-by: Alex Ivanov <lausgans@gmail.com>
Signed-off-by: Helge Deller <deller@gmx.de>

diff --git a/drivers/video/fbdev/stifb.c b/drivers/video/fbdev/stifb.c
index 86621fabbb8b3105a9b8e404e6c18b2f3830347d..735355b0e0233529ca8ed1fbbf4df40dec867bb9 100644 (file)
--- a/drivers/video/fbdev/stifb.c
+++ b/drivers/video/fbdev/stifb.c
@@ -121,6 +121,7 @@ static int __initdata stifb_bpp_pref[MAX_STI_ROMS];
 #define REG_3          0x0004a0
 #define REG_4          0x000600
 #define REG_6          0x000800
+#define REG_7          0x000804
 #define REG_8          0x000820
 #define REG_9          0x000a04
 #define REG_10         0x018000
@@ -135,6 +136,8 @@ static int __initdata stifb_bpp_pref[MAX_STI_ROMS];
 #define REG_21         0x200218
 #define REG_22         0x0005a0
 #define REG_23         0x0005c0
+#define REG_24         0x000808
+#define REG_25         0x000b00
 #define REG_26         0x200118
 #define REG_27         0x200308
 #define REG_32         0x21003c
@@ -429,6 +432,9 @@ ARTIST_ENABLE_DISABLE_DISPLAY(struct stifb_info *fb, int enable)
 #define SET_LENXY_START_RECFILL(fb, lenxy) \
        WRITE_WORD(lenxy, fb, REG_9)
 
+#define SETUP_COPYAREA(fb) \
+       WRITE_BYTE(0, fb, REG_16b1)
+
 static void
 HYPER_ENABLE_DISABLE_DISPLAY(struct stifb_info *fb, int enable)
 {
@@ -1004,6 +1010,36 @@ stifb_blank(int blank_mode, struct fb_info *info)
        return 0;
 }
 
+static void
+stifb_copyarea(struct fb_info *info, const struct fb_copyarea *area)
+{
+       struct stifb_info *fb = container_of(info, struct stifb_info, info);
+
+       SETUP_COPYAREA(fb);
+
+       SETUP_HW(fb);
+       if (fb->info.var.bits_per_pixel == 32) {
+               WRITE_WORD(0xBBA0A000, fb, REG_10);
+
+               NGLE_REALLY_SET_IMAGE_PLANEMASK(fb, 0xffffffff);
+       } else {
+               WRITE_WORD(fb->id == S9000_ID_HCRX ? 0x13a02000 : 0x13a01000, fb, REG_10);
+
+               NGLE_REALLY_SET_IMAGE_PLANEMASK(fb, 0xff);
+       }
+
+       NGLE_QUICK_SET_IMAGE_BITMAP_OP(fb,
+               IBOvals(RopSrc, MaskAddrOffset(0),
+               BitmapExtent08, StaticReg(1),
+               DataDynamic, MaskOtc, BGx(0), FGx(0)));
+
+       WRITE_WORD(((area->sx << 16) | area->sy), fb, REG_24);
+       WRITE_WORD(((area->width << 16) | area->height), fb, REG_7);
+       WRITE_WORD(((area->dx << 16) | area->dy), fb, REG_25);
+
+       SETUP_FB(fb);
+}
+
 static void __init
 stifb_init_display(struct stifb_info *fb)
 {
@@ -1069,7 +1105,7 @@ static struct fb_ops stifb_ops = {
        .fb_setcolreg   = stifb_setcolreg,
        .fb_blank       = stifb_blank,
        .fb_fillrect    = cfb_fillrect,
-       .fb_copyarea    = cfb_copyarea,
+       .fb_copyarea    = stifb_copyarea,
        .fb_imageblit   = cfb_imageblit,
 };
 
@@ -1258,7 +1294,7 @@ static int __init stifb_init_fb(struct sti_struct *sti, int bpp_pref)
        info->fbops = &stifb_ops;
        info->screen_base = ioremap_nocache(REGION_BASE(fb,1), fix->smem_len);
        info->screen_size = fix->smem_len;
-       info->flags = FBINFO_DEFAULT;
+       info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_COPYAREA;
        info->pseudo_palette = &fb->pseudo_palette;
 
        /* This has to be done !!! */