[PARISC] stifb: Fix framebuffer console at 32bpp

Fix stifb framebuffer console at 32bpp on a HCRX-24 card
by properly setting DIRECTCOLOR. Also a few nice cleanups
to the code.

Signed-off-by: Helge Deller <deller@parisc-linux.org>
Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>

1 files changed, 23 insertions, 21 deletions

diff --git a/drivers/video/stifb.c b/drivers/video/stifb.c
index 83cd76ca0265..3f050a770a15 100644
--- a/drivers/video/stifb.c
+++ b/drivers/video/stifb.c
@@ -3,7 +3,7 @@
  * Low level Frame buffer driver for HP workstations with 
  * STI (standard text interface) video firmware.
  *
- * Copyright (C) 2001-2004 Helge Deller <deller@gmx.de>
+ * Copyright (C) 2001-2005 Helge Deller <deller@gmx.de>
  * Portions Copyright (C) 2001 Thomas Bogendoerfer <tsbogend@alpha.franken.de>
  * 
  * Based on:
@@ -78,6 +78,8 @@
 
 #define NGLEDEVDEPROM_CRT_REGION 1
 
+#define NR_PALETTE 256
+
 typedef struct {
         __s32   video_config_reg;
         __s32   misc_video_start;
@@ -107,7 +109,7 @@ struct stifb_info {
         ngle_rom_t ngle_rom;
         struct sti_struct *sti;
         int deviceSpecificConfig;
-        u32 pseudo_palette[256];
+        u32 pseudo_palette[16];
 };
 
 static int __initdata stifb_bpp_pref[MAX_STI_ROMS];
@@ -347,10 +349,10 @@ ARTIST_ENABLE_DISABLE_DISPLAY(struct stifb_info *fb, int enable)
 #define IS_888_DEVICE(fb) \
         (!(IS_24_DEVICE(fb)))
 
-#define GET_FIFO_SLOTS(fb, cnt, numslots)                       \
-{       while (cnt < numslots)                                  \
+#define GET_FIFO_SLOTS(fb, cnt, numslots)       \
+{       while (cnt < numslots)                  \
                 cnt = READ_WORD(fb, REG_34);    \
-        cnt -= numslots;                                        \
+        cnt -= numslots;                        \
 }
 
 #define     IndexedDcd  0       /* Pixel data is indexed (pseudo) color */
@@ -990,7 +992,7 @@ stifb_setcolreg(u_int regno, u_int red, u_int green,
         struct stifb_info *fb = (struct stifb_info *) info;
         u32 color;
 
-        if (regno >= 256)  /* no. of hw registers */
+        if (regno >= NR_PALETTE)
                 return 1;
 
         red   >>= 8;
@@ -1000,8 +1002,8 @@ stifb_setcolreg(u_int regno, u_int red, u_int green,
         DEBUG_OFF();
 
         START_IMAGE_COLORMAP_ACCESS(fb);
-        
-        if (fb->info.var.grayscale) {
+
+        if (unlikely(fb->info.var.grayscale)) {
                 /* gray = 0.30*R + 0.59*G + 0.11*B */
                 color = ((red * 77) +
                          (green * 151) +
@@ -1012,17 +1014,17 @@ stifb_setcolreg(u_int regno, u_int red, u_int green,
                          (blue));
         }
 
-        if (info->var.bits_per_pixel == 32) {
-                ((u32 *)(info->pseudo_palette))[regno] =
-                        (red   << info->var.red.offset)   |
-                        (green << info->var.green.offset) |
-                        (blue  << info->var.blue.offset);
-        } else {
-                ((u32 *)(info->pseudo_palette))[regno] = regno;
+        if (fb->info.fix.visual == FB_VISUAL_DIRECTCOLOR) {
+                struct fb_var_screeninfo *var = &fb->info.var;
+                if (regno < 16)
+                        ((u32 *)fb->info.pseudo_palette)[regno] =
+                                regno << var->red.offset |
+                                regno << var->green.offset |
+                                regno << var->blue.offset;
         }
 
         WRITE_IMAGE_COLOR(fb, regno, color);
-        
+
         if (fb->id == S9000_ID_HCRX) {
                 NgleLutBltCtl lutBltCtl;
 
@@ -1061,9 +1063,9 @@ stifb_blank(int blank_mode, struct fb_info *info)
         case S9000_ID_HCRX:
                 HYPER_ENABLE_DISABLE_DISPLAY(fb, enable);
                 break;
-        case S9000_ID_A1659A:;  /* fall through */
-        case S9000_ID_TIMBER:;
-        case CRX24_OVERLAY_PLANES:;
+        case S9000_ID_A1659A:   /* fall through */
+        case S9000_ID_TIMBER:
+        case CRX24_OVERLAY_PLANES:
         default:
                 ENABLE_DISABLE_DISPLAY(fb, enable);
                 break;
@@ -1308,7 +1310,7 @@ stifb_init_fb(struct sti_struct *sti, int bpp_pref)
                 break;
             case 32:
                 fix->type = FB_TYPE_PACKED_PIXELS;
-                fix->visual = FB_VISUAL_TRUECOLOR;
+                fix->visual = FB_VISUAL_DIRECTCOLOR;
                 var->red.length = var->green.length = var->blue.length = var->transp.length = 8;
                 var->blue.offset = 0;
                 var->green.offset = 8;
@@ -1330,7 +1332,7 @@ stifb_init_fb(struct sti_struct *sti, int bpp_pref)
         info->pseudo_palette = &fb->pseudo_palette;
 
         /* This has to been done !!! */
-        fb_alloc_cmap(&info->cmap, 256, 0);
+        fb_alloc_cmap(&info->cmap, NR_PALETTE, 0);
         stifb_init_display(fb);
 
         if (!request_mem_region(fix->smem_start, fix->smem_len, "stifb fb")) {