fbdev/core/fbmem.c

66 int fb_get_color_depth(struct fb_var_screeninfo *var,
75 		if (var->green.length == var->blue.length &&
76 		    var->green.length == var->red.length &&
77 		    var->green.offset == var->blue.offset &&
78 		    var->green.offset == var->red.offset)
79 			depth = var->green.length;
81 			depth = var->green.length + var->red.length +
82 				var->blue.length;
166 fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var)
169 	unsigned int yres = info->var.yres;
172 	if (var->yoffset > 0) {
173 		if (var->vmode & FB_VMODE_YWRAP) {
174 			if (!fix->ywrapstep || (var->yoffset % fix->ywrapstep))
178 		} else if (!fix->ypanstep || (var->yoffset % fix->ypanstep))
182 	if (var->xoffset > 0 && (!fix->xpanstep ||
183 				 (var->xoffset % fix->xpanstep)))
187 	    var->yoffset > info->var.yres_virtual - yres ||
188 	    var->xoffset > info->var.xres_virtual - info->var.xres)
191 	if ((err = info->fbops->fb_pan_display(var, info)))
193 	info->var.xoffset = var->xoffset;
194 	info->var.yoffset = var->yoffset;
195 	if (var->vmode & FB_VMODE_YWRAP)
196 		info->var.vmode |= FB_VMODE_YWRAP;
198 		info->var.vmode &= ~FB_VMODE_YWRAP;
203 static int fb_check_caps(struct fb_info *info, struct fb_var_screeninfo *var,
213 	info->fbops->fb_get_caps(info, &fbcaps, var);
224 fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
233 	if (var->activate & FB_ACTIVATE_INV_MODE) {
236 		fb_var_to_videomode(&mode1, var);
237 		fb_var_to_videomode(&mode2, &info->var);
238 		/* make sure we don't delete the videomode of current var */
249 	if (!(var->activate & FB_ACTIVATE_FORCE) &&
250 	    !memcmp(&info->var, var, sizeof(struct fb_var_screeninfo)))
253 	activate = var->activate;
259 	    var->grayscale > 1) {
260 		if (var->red.offset     || var->green.offset    ||
261 		    var->blue.offset    || var->transp.offset   ||
262 		    var->red.length     || var->green.length    ||
263 		    var->blue.length    || var->transp.length   ||
264 		    var->red.msb_right  || var->green.msb_right ||
265 		    var->blue.msb_right || var->transp.msb_right)
270 		*var = info->var;
275 	if (var->xres < 8 || var->yres < 8)
279 	if (check_mul_overflow(var->xres, var->yres, &unused) ||
280 	    check_mul_overflow(var->xres_virtual, var->yres_virtual, &unused))
283 	ret = info->fbops->fb_check_var(var, info);
289 	if (var->xres_virtual < var->xres ||
290 	    var->yres_virtual < var->yres) {
293 			var->xres_virtual, var->yres_virtual,
294 			var->xres, var->yres);
298 	if ((var->activate & FB_ACTIVATE_MASK) != FB_ACTIVATE_NOW)
302 		ret = fb_check_caps(info, var, activate);
308 	old_var = info->var;
309 	info->var = *var;
315 			info->var = old_var;
323 	fb_pan_display(info, &info->var);
325 	fb_var_to_videomode(&mode, &info->var);
437 	fb_var_to_videomode(&mode, &fb_info->var);
621 	struct fb_var_screeninfo var = info->var;
630 		fb_videomode_to_var(&var, m);
631 		var.activate = FB_ACTIVATE_TEST;
632 		err = fb_set_var(info, &var);
633 		fb_var_to_videomode(&mode, &var);