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Commit b8c90945 authored by Antonino A. Daplas's avatar Antonino A. Daplas Committed by Linus Torvalds
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[PATCH] fbdev: Fix greater than 1 bit monochrome color handling 



Currently, fbcon assumes that the visual FB_VISUAL_MONO* is always 1 bit.
According to Geert, there are old hardware where it's possible to have
monochrome at 8-bit, but has only 2 colors, black - 0x00 and white - 0xff.
Fix color handlers (fb_get_color_depth, and get_color) for this special case.

Signed-off-by: default avatarAntonino Daplas <adaplas@pol.net>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 094bb659

drivers/video/console/bitblit.c

+1 −1
Original line number Diff line number Diff line
@@ -39,7 +39,7 @@ static inline int get_attribute(struct fb_info *info, u16 c) 
{

	int attribute = 0;



	if (fb_get_color_depth(&info->var) == 1) {

	if (fb_get_color_depth(&info->var, &info->fix) == 1) {

		if (attr_underline(c))

			attribute |= FBCON_ATTRIBUTE_UNDERLINE;

		if (attr_reverse(c))

drivers/video/console/fbcon.c

+17 −9
Original line number Diff line number Diff line
@@ -214,7 +214,7 @@ static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info) 
static inline int get_color(struct vc_data *vc, struct fb_info *info,

	      u16 c, int is_fg)

{

	int depth = fb_get_color_depth(&info->var);

	int depth = fb_get_color_depth(&info->var, &info->fix);

	int color = 0;



	if (console_blanked) {
@@ -230,9 +230,13 @@ static inline int get_color(struct vc_data *vc, struct fb_info *info, 
	switch (depth) {

	case 1:

	{

		int col = ~(0xfff << (max(info->var.green.length,

					  max(info->var.red.length,

					      info->var.blue.length)))) & 0xff;



		/* 0 or 1 */

		int fg = (info->fix.visual != FB_VISUAL_MONO01) ? 1 : 0;

		int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : 1;

		int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0;

		int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col;



		if (console_blanked)

			fg = bg;
@@ -246,7 +250,6 @@ static inline int get_color(struct vc_data *vc, struct fb_info *info, 
		 * is grayscale.

		 */

		color /= 4;

		break;

	case 3:

		/*

		 * Last 8 entries of default 16-color palette is a more intense
@@ -426,7 +429,7 @@ static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info, 
	 * remove underline attribute from erase character

	 * if black and white framebuffer.

	 */

	if (fb_get_color_depth(&info->var) == 1)

	if (fb_get_color_depth(&info->var, &info->fix) == 1)

		erase &= ~0x400;

	logo_height = fb_prepare_logo(info);

	logo_lines = (logo_height + vc->vc_font.height - 1) /
@@ -930,7 +933,7 @@ static void fbcon_init(struct vc_data *vc, int init) 
	}

	if (p->userfont)

		charcnt = FNTCHARCNT(p->fontdata);

	vc->vc_can_do_color = (fb_get_color_depth(&info->var) != 1);

	vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);

	vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;

	if (charcnt == 256) {

		vc->vc_hi_font_mask = 0;
@@ -1178,7 +1181,12 @@ static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var, 
	if (p->userfont)

		charcnt = FNTCHARCNT(p->fontdata);



	vc->vc_can_do_color = (fb_get_color_depth(var) != 1);

	var->activate = FB_ACTIVATE_NOW;

	info->var.activate = var->activate;

	info->var.yoffset = info->var.xoffset = 0;

	fb_set_var(info, var);



	vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);

	vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;

	if (charcnt == 256) {

		vc->vc_hi_font_mask = 0;
@@ -1967,7 +1975,7 @@ static int fbcon_switch(struct vc_data *vc) 
	set_blitting_type(vc, info, p);

	((struct fbcon_ops *)info->fbcon_par)->cursor_reset = 1;



	vc->vc_can_do_color = (fb_get_color_depth(&info->var) != 1);

	vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);

	vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;

	updatescrollmode(p, info, vc);
@@ -2332,7 +2340,7 @@ static int fbcon_set_palette(struct vc_data *vc, unsigned char *table) 
	if (!CON_IS_VISIBLE(vc))

		return 0;



	depth = fb_get_color_depth(&info->var);

	depth = fb_get_color_depth(&info->var, &info->fix);

	if (depth > 3) {

		for (i = j = 0; i < 16; i++) {

			k = table[i];

drivers/video/fbmem.c

+28 −13
Original line number Diff line number Diff line
@@ -62,16 +62,26 @@ int num_registered_fb; 
 * Helpers

 */



int fb_get_color_depth(struct fb_var_screeninfo *var)

int fb_get_color_depth(struct fb_var_screeninfo *var,

		       struct fb_fix_screeninfo *fix)

{

	int depth = 0;



	if (fix->visual == FB_VISUAL_MONO01 ||

	    fix->visual == FB_VISUAL_MONO10)

		depth = 1;

	else {

		if (var->green.length == var->blue.length &&

		    var->green.length == var->red.length &&

	    !var->green.offset && !var->blue.offset &&

	    !var->red.offset)

		return var->green.length;

		    var->green.offset == var->blue.offset &&

		    var->green.offset == var->red.offset)

			depth = var->green.length;

		else

		return (var->green.length + var->red.length +

			var->blue.length);

			depth = var->green.length + var->red.length +

				var->blue.length;

	}



	return depth;

}

EXPORT_SYMBOL(fb_get_color_depth);
@@ -249,13 +259,18 @@ static void fb_set_logo(struct fb_info *info, 
			       const struct linux_logo *logo, u8 *dst,

			       int depth)

{

	int i, j, k, fg = 1;

	int i, j, k;

	const u8 *src = logo->data;

	u8 d, xor = (info->fix.visual == FB_VISUAL_MONO01) ? 0xff : 0;

	u8 xor = (info->fix.visual == FB_VISUAL_MONO01) ? 0xff : 0;

	u8 fg = 1, d;



	if (fb_get_color_depth(&info->var) == 3)

	if (fb_get_color_depth(&info->var, &info->fix) == 3)

		fg = 7;



	if (info->fix.visual == FB_VISUAL_MONO01 ||

	    info->fix.visual == FB_VISUAL_MONO10)

		fg = ~((u8) (0xfff << info->var.green.length));



	switch (depth) {

	case 4:

		for (i = 0; i < logo->height; i++)
@@ -318,7 +333,7 @@ static struct logo_data { 


int fb_prepare_logo(struct fb_info *info)

{

	int depth = fb_get_color_depth(&info->var);

	int depth = fb_get_color_depth(&info->var, &info->fix);



	memset(&fb_logo, 0, sizeof(struct logo_data));

drivers/video/nvidia/nvidia.c

+4 −4
Original line number Diff line number Diff line
@@ -658,7 +658,7 @@ static int nvidia_calc_regs(struct fb_info *info) 
{

	struct nvidia_par *par = info->par;

	struct _riva_hw_state *state = &par->ModeReg;

	int i, depth = fb_get_color_depth(&info->var);

	int i, depth = fb_get_color_depth(&info->var, &info->fix);

	int h_display = info->var.xres / 8 - 1;

	int h_start = (info->var.xres + info->var.right_margin) / 8 - 1;

	int h_end = (info->var.xres + info->var.right_margin +
@@ -978,6 +978,9 @@ static int nvidiafb_set_par(struct fb_info *info) 
	    !par->twoHeads)

		par->FPDither = 0;



	info->fix.visual = (info->var.bits_per_pixel == 8) ?

	    FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_DIRECTCOLOR;



	nvidia_init_vga(info);

	nvidia_calc_regs(info);

	nvidia_write_regs(par);
@@ -992,9 +995,6 @@ static int nvidiafb_set_par(struct fb_info *info) 
	NVWriteCrtc(par, 0x11, 0x00);

	info->fix.line_length = (info->var.xres_virtual *

				 info->var.bits_per_pixel) >> 3;

	info->fix.visual = (info->var.bits_per_pixel == 8) ?

	    FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_DIRECTCOLOR;



	if (info->var.accel_flags) {

		info->fbops->fb_imageblit = nvidiafb_imageblit;

		info->fbops->fb_fillrect = nvidiafb_fillrect;

include/linux/fb.h

+2 −1
Original line number Diff line number Diff line
@@ -823,7 +823,8 @@ extern void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx, 
				u32 height, u32 shift_high, u32 shift_low, u32 mod);

extern void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height);

extern void fb_set_suspend(struct fb_info *info, int state);

extern int fb_get_color_depth(struct fb_var_screeninfo *var);

extern int fb_get_color_depth(struct fb_var_screeninfo *var,

			      struct fb_fix_screeninfo *fix);

extern int fb_get_options(char *name, char **option);

extern int fb_new_modelist(struct fb_info *info);