dm: x86: video: Add a driver-model driver for ivybridge graphics

At present we use the legacy vesa driver for graphics. Add a driver which
supports driver model. This can be probed only when needed, removing the
need to start up the display if it is not used.
Signed-off-by: NSimon Glass <sjg@chromium.org>
Reviewed-by: NBin Meng <bmeng.cn@gmail.com>

drivers/video/Kconfig

@@ -374,6 +374,18 @@ config VIDEO_BROADWELL_IGD
 	  a special tool which configures the VGA ROM, but the graphics
 	  resolution can be selected in U-Boot.
 
+config VIDEO_IVYBRIDGE_IGD
+	bool "Enable Intel Ivybridge integration graphics support"
+	depends on X86
+	help
+	  This enables support for integrated graphics on Intel ivybridge
+	  devices. Initialisation is mostly performed by a VGA boot ROM, with
+	  some setup handled by U-Boot itself. The graphics adaptor works as
+	  a VESA device and supports LCD panels, eDP and LVDS outputs.
+	  Configuration of most aspects of device operation is performed using
+	  a special tool which configures the VGA ROM, but the graphics
+	  resolution can be selected in U-Boot.
+
 config VIDEO_ROCKCHIP
 	bool "Enable Rockchip video support"
 	depends on DM_VIDEO

drivers/video/Makefile

@@ -20,6 +20,7 @@ obj-$(CONFIG_CONSOLE_TRUETYPE) += console_truetype.o fonts/
 endif
 
 obj-$(CONFIG_VIDEO_BROADWELL_IGD) += broadwell_igd.o
+obj-$(CONFIG_VIDEO_IVYBRIDGE_IGD) += ivybridge_igd.o
 
 obj-$(CONFIG_ATI_RADEON_FB) += ati_radeon_fb.o videomodes.o
 obj-$(CONFIG_ATMEL_HLCD) += atmel_hlcdfb.o