From 89ec4c238e7a3d7e660291f3f1a8181381baad77 Mon Sep 17 00:00:00 2001 From: "Antonino A. Daplas" Date: Mon, 10 Apr 2006 22:55:48 -0700 Subject: [PATCH] vesafb: Fix incorrect logo colors in x86_64 Bugzilla Bug 6299: A pixel size of 8 bits produces wrong logo colors in x86_64. The driver has 2 methods for setting the color map, using the protected mode interface provided by the video BIOS and directly writing to the VGA registers. The former is not supported in x86_64 and the latter is enabled only in i386. Fix by enabling the latter method in x86_64 only if supported by the BIOS. If both methods are unsupported, change the visual of vesafb to STATIC_PSEUDOCOLOR. Signed-off-by: Antonino Daplas Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/video/vesafb.c | 27 +++++++++++++++++++++------ 1 file changed, 21 insertions(+), 6 deletions(-) (limited to 'drivers/video/vesafb.c') diff --git a/drivers/video/vesafb.c b/drivers/video/vesafb.c index 8982e540214c..b0b9acfdd430 100644 --- 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, @@ -214,6 +221,7 @@ 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) @@ -318,6 +326,12 @@ 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) { @@ -354,7 +368,8 @@ 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, -- cgit v1.2.3-59-g8ed1b