Sync 1bpp initial palette setting with NetBSD/luna68k.

Tested by me on 1bpp framebuffer got recently.

diff --git a/sys/arch/luna88k/dev/lunafb.c b/sys/arch/luna88k/dev/lunafb.c
index f7c5617..5b7a932 100644 (file)
--- a/sys/arch/luna88k/dev/lunafb.c
+++ b/sys/arch/luna88k/dev/lunafb.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: lunafb.c,v 1.27 2020/05/25 09:55:48 jsg Exp $ */
+/* $OpenBSD: lunafb.c,v 1.28 2021/09/17 12:02:31 aoyama Exp $ */
 /* $NetBSD: lunafb.c,v 1.7.6.1 2002/08/07 01:48:34 lukem Exp $ */
 
 /*-
@@ -599,7 +599,27 @@ omfb_set_default_cmap(struct om_hwdevconfig *dc)
 {
        int i;
 
-       if ((hwplanebits == 1) || (hwplanebits == 4)) {
+       if (hwplanebits == 1) {
+               struct bt454 *odac = (struct bt454 *)OMFB_RAMDAC;
+               /*
+                * On 1bpp framebuffer, only plane P0 has framebuffer memory
+                * and other planes seems pulled up, i.e. always 1.
+                * Set white only for a palette (P0,P1,P2,P3) = (1,1,1,1).
+                */
+               odac->bt_addr = 0;
+               for (i = 0; i < 15; i++) {
+                       odac->bt_cmap = dc->dc_cmap.r[i] = 0;
+                       odac->bt_cmap = dc->dc_cmap.g[i] = 0;
+                       odac->bt_cmap = dc->dc_cmap.b[i] = 0;
+               }
+               /*
+                * The B/W video connector is connected to IOG of Bt454,
+                * and IOR and IOB are unused.
+                */
+               odac->bt_cmap = dc->dc_cmap.r[15] = 0;
+               odac->bt_cmap = dc->dc_cmap.g[15] = 255;
+               odac->bt_cmap = dc->dc_cmap.b[15] = 0;
+       } else if (hwplanebits == 4) {
                struct bt454 *odac = (struct bt454 *)OMFB_RAMDAC;
 
                odac->bt_addr = 0;