gpu/drm/drm_fb_helper.c

645 	u32 fb_height = info->var.yres;
649 	u32 x2 = info->var.xres;
666 		x1 = bit_off / info->var.bits_per_pixel;
667 		x2 = DIV_ROUND_UP(bit_end, info->var.bits_per_pixel);
815 		red >>= 16 - info->var.red.length;
816 		green >>= 16 - info->var.green.length;
817 		blue >>= 16 - info->var.blue.length;
818 		value = (red << info->var.red.offset) |
819 			(green << info->var.green.offset) |
820 			(blue << info->var.blue.offset);
821 		if (info->var.transp.length > 0) {
822 			u32 mask = (1 << info->var.transp.length) - 1;
824 			mask <<= info->var.transp.offset;
1128 static void drm_fb_helper_fill_pixel_fmt(struct fb_var_screeninfo *var,
1134 		var->red.offset = 0;
1135 		var->green.offset = 0;
1136 		var->blue.offset = 0;
1137 		var->red.length = depth;
1138 		var->green.length = depth;
1139 		var->blue.length = depth;
1140 		var->transp.offset = 0;
1141 		var->transp.length = 0;
1147 		var->red.offset = 10;
1148 		var->green.offset = 5;
1149 		var->blue.offset = 0;
1150 		var->red.length = 5;
1151 		var->green.length = 5;
1152 		var->blue.length = 5;
1153 		var->transp.offset = 15;
1154 		var->transp.length = 1;
1157 		var->red.offset = 11;
1158 		var->green.offset = 5;
1159 		var->blue.offset = 0;
1160 		var->red.length = 5;
1161 		var->green.length = 6;
1162 		var->blue.length = 5;
1163 		var->transp.offset = 0;
1166 		var->red.offset = 16;
1167 		var->green.offset = 8;
1168 		var->blue.offset = 0;
1169 		var->red.length = 8;
1170 		var->green.length = 8;
1171 		var->blue.length = 8;
1172 		var->transp.offset = 0;
1173 		var->transp.length = 0;
1176 		var->red.offset = 16;
1177 		var->green.offset = 8;
1178 		var->blue.offset = 0;
1179 		var->red.length = 8;
1180 		var->green.length = 8;
1181 		var->blue.length = 8;
1182 		var->transp.offset = 24;
1183 		var->transp.length = 8;
1190 static void __fill_var(struct fb_var_screeninfo *var, struct fb_info *info,
1195 	var->xres_virtual = fb->width;
1196 	var->yres_virtual = fb->height;
1197 	var->accel_flags = 0;
1198 	var->bits_per_pixel = drm_format_info_bpp(fb->format, 0);
1200 	var->height = info->var.height;
1201 	var->width = info->var.width;
1203 	var->left_margin = var->right_margin = 0;
1204 	var->upper_margin = var->lower_margin = 0;
1205 	var->hsync_len = var->vsync_len = 0;
1206 	var->sync = var->vmode = 0;
1207 	var->rotate = 0;
1208 	var->colorspace = 0;
1210 		var->reserved[i] = 0;
1215  * @var: screeninfo to check
1218 int drm_fb_helper_check_var(struct fb_var_screeninfo *var,
1230 	if (var->pixclock != 0) {
1232 		var->pixclock = 0;
1254 	if (var->bits_per_pixel > bpp ||
1255 	    var->xres > fb->width || var->yres > fb->height ||
1256 	    var->xres_virtual > fb->width || var->yres_virtual > fb->height) {
1259 			  var->xres, var->yres, var->bits_per_pixel,
1260 			  var->xres_virtual, var->yres_virtual,
1265 	__fill_var(var, info, fb);
1271 	if (var->yoffset > var->yres_virtual - var->yres ||
1272 	    var->xoffset > var->xres_virtual - var->xres)
1276 	if (var->grayscale > 0)
1279 	if (var->nonstd)
1287 	if (!var->red.offset     && !var->green.offset    &&
1288 	    !var->blue.offset    && !var->transp.offset   &&
1289 	    !var->red.length     && !var->green.length    &&
1290 	    !var->blue.length    && !var->transp.length   &&
1291 	    !var->red.msb_right  && !var->green.msb_right &&
1292 	    !var->blue.msb_right && !var->transp.msb_right) {
1293 		drm_fb_helper_fill_pixel_fmt(var, format);
1300 	if (!drm_fb_pixel_format_equal(var, &info->var)) {
1320 	struct fb_var_screeninfo *var = &info->var;
1342 	force = var->activate & FB_ACTIVATE_KD_TEXT;
1362 static int pan_display_atomic(struct fb_var_screeninfo *var,
1368 	pan_set(fb_helper, var->xoffset, var->yoffset);
1372 		info->var.xoffset = var->xoffset;
1373 		info->var.yoffset = var->yoffset;
1375 		pan_set(fb_helper, info->var.xoffset, info->var.yoffset);
1380 static int pan_display_legacy(struct fb_var_screeninfo *var,
1391 		modeset->x = var->xoffset;
1392 		modeset->y = var->yoffset;
1397 				info->var.xoffset = var->xoffset;
1398 				info->var.yoffset = var->yoffset;
1410  * @var: updated screen information
1413 int drm_fb_helper_pan_display(struct fb_var_screeninfo *var,
1430 		ret = pan_display_atomic(var, info);
1432 		ret = pan_display_legacy(var, info);
1719 	info->var.xoffset = 0;
1720 	info->var.yoffset = 0;
1721 	__fill_var(&info->var, info, fb);
1722 	info->var.activate = FB_ACTIVATE_NOW;
1724 	drm_fb_helper_fill_pixel_fmt(&info->var, format);
1726 	info->var.xres = fb_width;
1727 	info->var.yres = fb_height;
1803 			info->var.width = connector->display_info.width_mm;
1804 			info->var.height = connector->display_info.height_mm;
1861 	info->var.pixclock = 0;