ARM: OMAP2+: display: Create omap_vout device inside omap_display_init

Move omap_vout device creation inside the omap_display_init so that we can
correctly create the device based on the presence of omapdss within the
platform.

For example, on a kernel image supporting multiple platforms, omap_init_vout
will create a omapdrm platform device on a AM33xx platform even though it
doesn't have a DSS block.
Signed-off-by: Archit Taneja <archit@ti.com>
Acked-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/devices.c

@@ -37,6 +37,7 @@
 #include "mux.h"
 #include "control.h"
 #include "devices.h"
+#include "display.h"
 
 #define L3_MODULES_MAX_LEN 12
 #define L3_MODULES 3
@@ -466,13 +467,13 @@ static struct platform_device omap_vout_device = {
 	.resource 	= &omap_vout_resource[0],
 	.id		= -1,
 };
-static void omap_init_vout(void)
+
+int __init omap_init_vout(void)
 {
-	if (platform_device_register(&omap_vout_device) < 0)
-		printk(KERN_ERR "Unable to register OMAP-VOUT device\n");
+	return platform_device_register(&omap_vout_device);
 }
 #else
-static inline void omap_init_vout(void) {}
+int __init omap_init_vout(void) { return 0; }
 #endif
 
 #if IS_ENABLED(CONFIG_WL12XX)
@@ -536,7 +537,6 @@ static int __init omap2_init_devices(void)
 		omap_init_wl12xx_of();
 	}
 	omap_init_sti();
-	omap_init_vout();
 
 	return 0;
 }

arch/arm/mach-omap2/display.c

@@ -437,6 +437,13 @@ int __init omap_display_init(struct omap_dss_board_info *board_data)
 		return r;
 	}
 
+	/* create V4L2 display device */
+	r = omap_init_vout();
+	if (r < 0) {
+		pr_err("Unable to register omap_vout device\n");
+		return r;
+	}
+
 	return 0;
 }
 

arch/arm/mach-omap2/display.h

@@ -29,4 +29,5 @@ struct omap_dss_dispc_dev_attr {
 int omap_init_drm(void);
 int omap_init_vrfb(void);
 int omap_init_fb(void);
+int omap_init_vout(void);
 #endif