~hc/RK356X_SDK_RELEASE.git

..	..	@@ -184,6 +184,25 @@
184	184	vga_io_w(VGA_GFX_I, index);
185	185	}
186	186
	187	+/* Check if the video mode is supported by the driver */
	188	+static inline int check_mode_supported(void)
	189	+{
	190	+ /* non-x86 architectures treat orig_video_isVGA as a boolean flag */
	191	+#if defined(CONFIG_X86)
	192	+ /* only EGA and VGA in 16 color graphic mode are supported */
	193	+ if (screen_info.orig_video_isVGA != VIDEO_TYPE_EGAC &&
	194	+ screen_info.orig_video_isVGA != VIDEO_TYPE_VGAC)
	195	+ return -ENODEV;
	196	+
	197	+ if (screen_info.orig_video_mode != 0x0D && /* 320x200/4 (EGA) */
	198	+ screen_info.orig_video_mode != 0x0E && /* 640x200/4 (EGA) */
	199	+ screen_info.orig_video_mode != 0x10 && /* 640x350/4 (EGA) */
	200	+ screen_info.orig_video_mode != 0x12) /* 640x480/4 (VGA) */
	201	+ return -ENODEV;
	202	+#endif
	203	+ return 0;
	204	+}
	205	+
187	206	static void vga16fb_pan_var(struct fb_info *info,
188	207	struct fb_var_screeninfo *var)
189	208	{
..	..	@@ -1270,7 +1289,7 @@
1270	1289	framebuffer_release(info);
1271	1290	}
1272	1291
1273		-static struct fb_ops vga16fb_ops = {
	1292	+static const struct fb_ops vga16fb_ops = {
1274	1293	.owner = THIS_MODULE,
1275	1294	.fb_open = vga16fb_open,
1276	1295	.fb_release = vga16fb_release,
..	..	@@ -1422,6 +1441,11 @@
1422	1441
1423	1442	vga16fb_setup(option);
1424	1443	#endif
	1444	+
	1445	+ ret = check_mode_supported();
	1446	+ if (ret)
	1447	+ return ret;
	1448	+
1425	1449	ret = platform_driver_register(&vga16fb_driver);
1426	1450
1427	1451	if (!ret) {