71 static int vfb_check_var(struct fb_var_screeninfo *var,
76 static int vfb_pan_display(struct fb_var_screeninfo *var,
117 static int vfb_check_var(struct fb_var_screeninfo *var,  in vfb_check_var()  argument
127 	if (var->vmode & FB_VMODE_CONUPDATE) {  in vfb_check_var()
128 		var->vmode |= FB_VMODE_YWRAP;  in vfb_check_var()
129 		var->xoffset = info->var.xoffset;  in vfb_check_var()
130 		var->yoffset = info->var.yoffset;  in vfb_check_var()
136 	if (!var->xres)  in vfb_check_var()
137 		var->xres = 1;  in vfb_check_var()
138 	if (!var->yres)  in vfb_check_var()
139 		var->yres = 1;  in vfb_check_var()
140 	if (var->xres > var->xres_virtual)  in vfb_check_var()
141 		var->xres_virtual = var->xres;  in vfb_check_var()
142 	if (var->yres > var->yres_virtual)  in vfb_check_var()
143 		var->yres_virtual = var->yres;  in vfb_check_var()
144 	if (var->bits_per_pixel <= 1)  in vfb_check_var()
145 		var->bits_per_pixel = 1;  in vfb_check_var()
146 	else if (var->bits_per_pixel <= 8)  in vfb_check_var()
147 		var->bits_per_pixel = 8;  in vfb_check_var()
148 	else if (var->bits_per_pixel <= 16)  in vfb_check_var()
149 		var->bits_per_pixel = 16;  in vfb_check_var()
150 	else if (var->bits_per_pixel <= 24)  in vfb_check_var()
151 		var->bits_per_pixel = 24;  in vfb_check_var()
152 	else if (var->bits_per_pixel <= 32)  in vfb_check_var()
153 		var->bits_per_pixel = 32;  in vfb_check_var()
157 	if (var->xres_virtual < var->xoffset + var->xres)  in vfb_check_var()
158 		var->xres_virtual = var->xoffset + var->xres;  in vfb_check_var()
159 	if (var->yres_virtual < var->yoffset + var->yres)  in vfb_check_var()
160 		var->yres_virtual = var->yoffset + var->yres;  in vfb_check_var()
166 	    get_line_length(var->xres_virtual, var->bits_per_pixel);  in vfb_check_var()
167 	if (line_length * var->yres_virtual > videomemorysize)  in vfb_check_var()
175 	switch (var->bits_per_pixel) {  in vfb_check_var()
178 		var->red.offset = 0;  in vfb_check_var()
179 		var->red.length = 8;  in vfb_check_var()
180 		var->green.offset = 0;  in vfb_check_var()
181 		var->green.length = 8;  in vfb_check_var()
182 		var->blue.offset = 0;  in vfb_check_var()
183 		var->blue.length = 8;  in vfb_check_var()
184 		var->transp.offset = 0;  in vfb_check_var()
185 		var->transp.length = 0;  in vfb_check_var()
188 		if (var->transp.length) {  in vfb_check_var()
189 			var->red.offset = 0;  in vfb_check_var()
190 			var->red.length = 5;  in vfb_check_var()
191 			var->green.offset = 5;  in vfb_check_var()
192 			var->green.length = 5;  in vfb_check_var()
193 			var->blue.offset = 10;  in vfb_check_var()
194 			var->blue.length = 5;  in vfb_check_var()
195 			var->transp.offset = 15;  in vfb_check_var()
196 			var->transp.length = 1;  in vfb_check_var()
198 			var->red.offset = 0;  in vfb_check_var()
199 			var->red.length = 5;  in vfb_check_var()
200 			var->green.offset = 5;  in vfb_check_var()
201 			var->green.length = 6;  in vfb_check_var()
202 			var->blue.offset = 11;  in vfb_check_var()
203 			var->blue.length = 5;  in vfb_check_var()
204 			var->transp.offset = 0;  in vfb_check_var()
205 			var->transp.length = 0;  in vfb_check_var()
209 		var->red.offset = 0;  in vfb_check_var()
210 		var->red.length = 8;  in vfb_check_var()
211 		var->green.offset = 8;  in vfb_check_var()
212 		var->green.length = 8;  in vfb_check_var()
213 		var->blue.offset = 16;  in vfb_check_var()
214 		var->blue.length = 8;  in vfb_check_var()
215 		var->transp.offset = 0;  in vfb_check_var()
216 		var->transp.length = 0;  in vfb_check_var()
219 		var->red.offset = 0;  in vfb_check_var()
220 		var->red.length = 8;  in vfb_check_var()
221 		var->green.offset = 8;  in vfb_check_var()
222 		var->green.length = 8;  in vfb_check_var()
223 		var->blue.offset = 16;  in vfb_check_var()
224 		var->blue.length = 8;  in vfb_check_var()
225 		var->transp.offset = 24;  in vfb_check_var()
226 		var->transp.length = 8;  in vfb_check_var()
229 	var->red.msb_right = 0;  in vfb_check_var()
230 	var->green.msb_right = 0;  in vfb_check_var()
231 	var->blue.msb_right = 0;  in vfb_check_var()
232 	var->transp.msb_right = 0;  in vfb_check_var()
243 	switch (info->var.bits_per_pixel) {  in vfb_set_par()
257 	info->fix.line_length = get_line_length(info->var.xres_virtual,  in vfb_set_par()
258 						info->var.bits_per_pixel);  in vfb_set_par()
279 	if (info->var.grayscale) {  in vfb_setcolreg()
313 		red = CNVT_TOHW(red, info->var.red.length);  in vfb_setcolreg()
314 		green = CNVT_TOHW(green, info->var.green.length);  in vfb_setcolreg()
315 		blue = CNVT_TOHW(blue, info->var.blue.length);  in vfb_setcolreg()
316 		transp = CNVT_TOHW(transp, info->var.transp.length);  in vfb_setcolreg()
334 		v = (red << info->var.red.offset) |  in vfb_setcolreg()
335 		    (green << info->var.green.offset) |  in vfb_setcolreg()
336 		    (blue << info->var.blue.offset) |  in vfb_setcolreg()
337 		    (transp << info->var.transp.offset);  in vfb_setcolreg()
338 		switch (info->var.bits_per_pixel) {  in vfb_setcolreg()
360 static int vfb_pan_display(struct fb_var_screeninfo *var,  in vfb_pan_display()  argument
363 	if (var->vmode & FB_VMODE_YWRAP) {  in vfb_pan_display()
364 		if (var->yoffset >= info->var.yres_virtual ||  in vfb_pan_display()
365 		    var->xoffset)  in vfb_pan_display()
368 		if (var->xoffset + info->var.xres > info->var.xres_virtual ||  in vfb_pan_display()
369 		    var->yoffset + info->var.yres > info->var.yres_virtual)  in vfb_pan_display()
372 	info->var.xoffset = var->xoffset;  in vfb_pan_display()
373 	info->var.yoffset = var->yoffset;  in vfb_pan_display()
374 	if (var->vmode & FB_VMODE_YWRAP)  in vfb_pan_display()
375 		info->var.vmode |= FB_VMODE_YWRAP;  in vfb_pan_display()
377 		info->var.vmode &= ~FB_VMODE_YWRAP;  in vfb_pan_display()
446 	if (!fb_find_mode(&info->var, info, mode_option,  in vfb_probe()