atyfb: speed up Mach64 cursor

Save one fifo entry on cursor enabling and disabling.

Save another fifo entry for FB_CUR_SETPOS operation by removing redundant one.

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>

diff --git a/drivers/video/aty/mach64_cursor.c b/drivers/video/aty/mach64_cursor.c
index faf95da..04c7108 100644 (file)
--- a/drivers/video/aty/mach64_cursor.c
+++ b/drivers/video/aty/mach64_cursor.c
@@ -77,9 +77,13 @@ static int atyfb_cursor(struct fb_info *info, struct fb_cursor *cursor)
        if (par->asleep)
                return -EPERM;
 
-       /* Hide cursor */
        wait_for_fifo(1, par);
-       aty_st_le32(GEN_TEST_CNTL, aty_ld_le32(GEN_TEST_CNTL, par) & ~HWCURSOR_ENABLE, par);
+       if (cursor->enable)
+               aty_st_le32(GEN_TEST_CNTL, aty_ld_le32(GEN_TEST_CNTL, par)
+                           | HWCURSOR_ENABLE, par);
+       else
+               aty_st_le32(GEN_TEST_CNTL, aty_ld_le32(GEN_TEST_CNTL, par)
+                               & ~HWCURSOR_ENABLE, par);
 
        /* set position */
        if (cursor->set & FB_CUR_SETPOS) {
@@ -109,7 +113,7 @@ static int atyfb_cursor(struct fb_info *info, struct fb_cursor *cursor)
                        y<<=1;
                        h<<=1;
                }
-               wait_for_fifo(4, par);
+               wait_for_fifo(3, par);
                aty_st_le32(CUR_OFFSET, (info->fix.smem_len >> 3) + (yoff << 1), par);
                aty_st_le32(CUR_HORZ_VERT_OFF,
                            ((u32) (64 - h + yoff) << 16) | xoff, par);
@@ -177,11 +181,6 @@ static int atyfb_cursor(struct fb_info *info, struct fb_cursor *cursor)
            }
        }
 
-       if (cursor->enable) {
-               wait_for_fifo(1, par);
-               aty_st_le32(GEN_TEST_CNTL, aty_ld_le32(GEN_TEST_CNTL, par)
-                           | HWCURSOR_ENABLE, par);
-       }
        return 0;
 }