[PATCH] tgafb: sync-on-green support fixes

This sets up the deep register of the TGA ASIC as well as the blank pedestal
of the Bt463 RAMDAC correctly for the sync-on-green mode.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Cc: James Simmons <jsimmons@infradead.org>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 5 insertions, 3 deletions

diff --git a/drivers/video/tgafb.c b/drivers/video/tgafb.c
index 2a6bfcdc3039..781ca7f77c09 100644
--- a/drivers/video/tgafb.c
+++ b/drivers/video/tgafb.c
@@ -197,7 +197,9 @@ tgafb_set_par(struct fb_info *info)
         while (TGA_READ_REG(par, TGA_CMD_STAT_REG) & 1) /* wait for not busy */
                 continue;
         mb();
-        TGA_WRITE_REG(par, deep_presets[tga_type], TGA_DEEP_REG);
+        TGA_WRITE_REG(par, deep_presets[tga_type] |
+                           (par->sync_on_green ? 0x0 : 0x00010000),
+                      TGA_DEEP_REG);
         while (TGA_READ_REG(par, TGA_CMD_STAT_REG) & 1) /* wait for not busy */
                 continue;
         mb();
@@ -261,11 +263,11 @@ tgafb_set_par(struct fb_info *info)
 
         } else { /* 24-plane or 24plusZ */
 
-                /* Init BT463 registers.  */
+                /* Init BT463 RAMDAC registers.  */
                 BT463_WRITE(par, BT463_REG_ACC, BT463_CMD_REG_0, 0x40);
                 BT463_WRITE(par, BT463_REG_ACC, BT463_CMD_REG_1, 0x08);
                 BT463_WRITE(par, BT463_REG_ACC, BT463_CMD_REG_2,
-                            (par->sync_on_green ? 0x80 : 0x40));
+                            (par->sync_on_green ? 0xc0 : 0x40));
 
                 BT463_WRITE(par, BT463_REG_ACC, BT463_READ_MASK_0, 0xff);
                 BT463_WRITE(par, BT463_REG_ACC, BT463_READ_MASK_1, 0xff);