- 2.6.17 port work build breaks, but the patch set is relativly stable

[linux-flexiantxendom0-3.2.10.git] / drivers / video / vesafb.c

diff --git a/drivers/video/vesafb.c b/drivers/video/vesafb.c
index 260f6bb..0a05fdf 100644 (file)
--- a/drivers/video/vesafb.c
+++ b/drivers/video/vesafb.c
@@ -57,7 +57,7 @@ static unsigned short  *pmi_base  = NULL;
 static void            (*pmi_start)(void);
 static void            (*pmi_pal)(void);
 static int             depth;
-
+static int             vga_compat;
 /* --------------------------------------------------------------------- */
 
 static int vesafb_pan_display(struct fb_var_screeninfo *var,
@@ -83,9 +83,10 @@ static int vesafb_pan_display(struct fb_var_screeninfo *var,
 static void vesa_setpalette(int regno, unsigned red, unsigned green,
                            unsigned blue)
 {
+       int shift = 16 - depth;
+
 #ifdef __i386__
        struct { u_char blue, green, red, pad; } entry;
-       int shift = 16 - depth;
 
        if (pmi_setpal) {
                entry.red   = red   >> shift;
@@ -101,14 +102,20 @@ static void vesa_setpalette(int regno, unsigned red, unsigned green,
                   "d" (regno),          /* EDX */
                   "D" (&entry),         /* EDI */
                   "S" (&pmi_pal));      /* ESI */
-       } else {
-               /* without protected mode interface, try VGA registers... */
+               return;
+       }
+#endif
+
+/*
+ * without protected mode interface and if VGA compatible,
+ * try VGA registers...
+ */
+       if (vga_compat) {
                outb_p(regno,       dac_reg);
                outb_p(red   >> shift, dac_val);
                outb_p(green >> shift, dac_val);
                outb_p(blue  >> shift, dac_val);
        }
-#endif
 }
 
 static int vesafb_setcolreg(unsigned regno, unsigned red, unsigned green,
@@ -217,6 +224,7 @@ static int __init vesafb_probe(struct platform_device *dev)
        if (screen_info.orig_video_isVGA != VIDEO_TYPE_VLFB)
                return -ENODEV;
 
+       vga_compat = (screen_info.capabilities & 2) ? 0 : 1;
        vesafb_fix.smem_start = screen_info.lfb_base;
        vesafb_defined.bits_per_pixel = screen_info.lfb_depth;
        if (15 == vesafb_defined.bits_per_pixel)
@@ -324,6 +332,12 @@ static int __init vesafb_probe(struct platform_device *dev)
                }
        }
 
+       if (vesafb_defined.bits_per_pixel == 8 && !pmi_setpal && !vga_compat) {
+               printk(KERN_WARNING "vesafb: hardware palette is unchangeable,\n"
+                                   "        colors may be incorrect\n");
+               vesafb_fix.visual = FB_VISUAL_STATIC_PSEUDOCOLOR;
+       }
+
        vesafb_defined.xres_virtual = vesafb_defined.xres;
        vesafb_defined.yres_virtual = vesafb_fix.smem_len / vesafb_fix.line_length;
        if (ypan && vesafb_defined.yres_virtual > vesafb_defined.yres) {
@@ -360,7 +374,8 @@ static int __init vesafb_probe(struct platform_device *dev)
        printk(KERN_INFO "vesafb: %s: "
               "size=%d:%d:%d:%d, shift=%d:%d:%d:%d\n",
               (vesafb_defined.bits_per_pixel > 8) ?
-              "Truecolor" : "Pseudocolor",
+              "Truecolor" : (vga_compat || pmi_setpal) ?
+              "Pseudocolor" : "Static Pseudocolor",
               screen_info.rsvd_size,
               screen_info.red_size,
               screen_info.green_size,