video/fbdev/gbefb.c

36 	struct fb_var_screeninfo var;
454 static int compute_gbe_timing(struct fb_var_screeninfo *var,
479 				error = var->pixclock - pixclock;
504 		timing->width = var->xres;
505 		timing->height = var->yres;
511 		timing->htotal = var->left_margin + var->xres +
512 				var->right_margin + var->hsync_len;
513 		timing->vtotal = var->upper_margin + var->yres +
514 				var->lower_margin + var->vsync_len;
517 		timing->hblank_start = var->xres;
518 		timing->vblank_start = var->yres;
520 		timing->hsync_start = var->xres + var->right_margin + 1;
521 		timing->hsync_end = timing->hsync_start + var->hsync_len;
523 		timing->vsync_start = var->yres + var->lower_margin + 1;
524 		timing->vsync_end = timing->vsync_start + var->vsync_len;
649 	compute_gbe_timing(&info->var, &par->timing);
651 	bytesPerPixel = info->var.bits_per_pixel / 8;
652 	info->fix.line_length = info->var.xres_virtual * bytesPerPixel;
817 			     struct fb_var_screeninfo *var)
826 	switch (var->bits_per_pixel) {
837 	fix->line_length = var->xres_virtual * var->bits_per_pixel / 8;
845  *  entries in the var structure). Return != 0 for invalid regno.
860 	if (info->var.bits_per_pixel <= 8) {
873 		switch (info->var.bits_per_pixel) {
880 				(red << info->var.red.offset) |
881 				(green << info->var.green.offset) |
882 				(blue << info->var.blue.offset);
886 				(red << info->var.red.offset) |
887 				(green << info->var.green.offset) |
888 				(blue << info->var.blue.offset);
897  *  Check video mode validity, eventually modify var to best match.
899 static int gbefb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
906 	if (var->bits_per_pixel <= 8)
907 		var->bits_per_pixel = 8;
908 	else if (var->bits_per_pixel <= 16)
909 		var->bits_per_pixel = 16;
910 	else if (var->bits_per_pixel <= 32)
911 		var->bits_per_pixel = 32;
917 	if ((var->xres * var->yres * var->bits_per_pixel) & 4095)
920 	var->grayscale = 0;	/* No grayscale for now */
922 	ret = compute_gbe_timing(var, &timing);
923 	var->pixclock = ret;
928 	if (var->xres > var->xres_virtual || (!ywrap && !ypan))
929 		var->xres_virtual = var->xres;
930 	if (var->yres > var->yres_virtual || (!ywrap && !ypan))
931 		var->yres_virtual = var->yres;
933 	if (var->vmode & FB_VMODE_CONUPDATE) {
934 		var->vmode |= FB_VMODE_YWRAP;
935 		var->xoffset = info->var.xoffset;
936 		var->yoffset = info->var.yoffset;
940 	var->grayscale = 0;
943 	line_length = var->xres_virtual * var->bits_per_pixel / 8;
944 	if (line_length * var->yres_virtual > gbe_mem_size)
947 	switch (var->bits_per_pixel) {
949 		var->red.offset = 0;
950 		var->red.length = 8;
951 		var->green.offset = 0;
952 		var->green.length = 8;
953 		var->blue.offset = 0;
954 		var->blue.length = 8;
955 		var->transp.offset = 0;
956 		var->transp.length = 0;
959 		var->red.offset = 10;
960 		var->red.length = 5;
961 		var->green.offset = 5;
962 		var->green.length = 5;
963 		var->blue.offset = 0;
964 		var->blue.length = 5;
965 		var->transp.offset = 0;
966 		var->transp.length = 0;
969 		var->red.offset = 24;
970 		var->red.length = 8;
971 		var->green.offset = 16;
972 		var->green.length = 8;
973 		var->blue.offset = 8;
974 		var->blue.length = 8;
975 		var->transp.offset = 0;
976 		var->transp.length = 8;
979 	var->red.msb_right = 0;
980 	var->green.msb_right = 0;
981 	var->blue.msb_right = 0;
982 	var->transp.msb_right = 0;
984 	var->left_margin = timing.htotal - timing.hsync_end;
985 	var->right_margin = timing.hsync_start - timing.width;
986 	var->upper_margin = timing.vtotal - timing.vsync_end;
987 	var->lower_margin = timing.vsync_start - timing.height;
988 	var->hsync_len = timing.hsync_end - timing.hsync_start;
989 	var->vsync_len = timing.vsync_end - timing.vsync_start;
1205 	if (fb_find_mode(&par->var, info, mode_option, NULL, 0,
1207 		par->var = *default_var;
1208 	info->var = par->var;
1209 	gbefb_check_var(&par->var, info);
1210 	gbefb_encode_fix(&info->fix, &info->var);