fbdev: c2p/atafb - Add support for Atari interleaved bitplanes

The c2p() for normal bitplanes is not suitable for interleaved bitplanes with
2 bytes of interleave, causing a garbled penguin logo. Add c2p_iplan2().

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>

1 files changed, 3 insertions, 12 deletions

diff --git a/drivers/video/atafb.c b/drivers/video/atafb.c
index f932c138fe1d..477ce55bbae9 100644
--- a/drivers/video/atafb.c
+++ b/drivers/video/atafb.c
@@ -122,7 +122,6 @@ static struct atafb_par {
         void *screen_base;
         int yres_virtual;
         u_long next_line;
-        u_long next_plane;
 #if defined ATAFB_TT || defined ATAFB_STE
         union {
                 struct {
@@ -1392,14 +1391,7 @@ set_screen_base:
         par->screen_base = screen_base + var->yoffset * linelen;
         par->hw.falcon.xoffset = 0;
 
-        // FIXME!!! sort of works, no crash
-        //par->next_line = linelen;
-        //par->next_plane = yres_virtual * linelen;
         par->next_line = linelen;
-        par->next_plane = 2;
-        // crashes
-        //par->next_plane = linelen;
-        //par->next_line  = yres_virtual * linelen;
 
         return 0;
 }
@@ -2662,10 +2654,9 @@ static void atafb_imageblit(struct fb_info *info, const struct fb_image *image)
                         src += pitch;
                 }
         } else {
-                // only used for logo; broken
-                c2p(info->screen_base, image->data, dx, dy, width, height,
-                    par->next_line, par->next_plane, image->width,
-                    info->var.bits_per_pixel);
+                c2p_iplan2(info->screen_base, image->data, dx, dy, width,
+                           height, par->next_line, image->width,
+                           info->var.bits_per_pixel);
         }
 }