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[PATCH] vesafb: Prefer VGA registers over PMI

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- As per VESA specs, use the VGA registers to set the palette if the mode is
  VGA compatible.  Otherwise, use the protected mode interface.

- Make pmi_setpal default to 1

Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Antonino A. Daplas 2006-06-26 00:26:41 -07:00 committed by Linus Torvalds
parent 313ca22f0b
commit 6dbde380ca
1 changed files with 18 additions and 16 deletions
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34
drivers/video/vesafb.c
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@ -51,7 +51,7 @@ static int inverse = 0;
static int mtrr = 0; /* disable mtrr */
static int vram_remap __initdata = 0; /* Set amount of memory to be used */
static int vram_total __initdata = 0; /* Set total amount of memory */
static int pmi_setpal = 0; /* pmi for palette changes ??? */
static int pmi_setpal = 1; /* pmi for palette changes ??? */
static int ypan = 0; /* 0..nothing, 1..ypan, 2..ywrap */
static unsigned short *pmi_base = NULL;
static void (*pmi_start)(void);
@ -86,10 +86,24 @@ static int vesa_setpalette(int regno, unsigned red, unsigned green,
int shift = 16 - depth;
int err = -EINVAL;
#ifdef __i386__
struct { u_char blue, green, red, pad; } entry;
/*
* Try VGA registers first...
*/
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);
err = 0;
}
#ifdef __i386__
/*
* Fallback to the PMI....
*/
if (err && pmi_setpal) {
struct { u_char blue, green, red, pad; } entry;
if (pmi_setpal) {
entry.red = red >> shift;
entry.green = green >> shift;
entry.blue = blue >> shift;
@ -107,18 +121,6 @@ static int vesa_setpalette(int regno, unsigned red, unsigned green,
}
#endif
/*
* without protected mode interface and if VGA compatible,
* try VGA registers...
*/
if (err && 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);
err = 0;
}
return err;
}