OMAPDSS: simplify submodule reg/unreg code

Now that we are using components in omapdss, there's no need for
separate handling of dss and dispc driver init. Thus we can move the dss
and dispc init and unit func pointers to the lists we use for the other
dss submodules.

We can now also handle errors returned by the registration functions
properly: if registering a driver fails, we can stop processing and
return the error.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

diff --git a/drivers/video/fbdev/omap2/dss/core.c b/drivers/video/fbdev/omap2/dss/core.c
index 5c64515de81827260cba7b8f59ca02b8f226310d..54eeb507f9b379c4c494a4f4a5b5dcbe7e9b6ea7 100644 (file)
--- a/drivers/video/fbdev/omap2/dss/core.c
+++ b/drivers/video/fbdev/omap2/dss/core.c
@@ -245,6 +245,8 @@ static struct platform_driver omap_dss_driver = {
 
 /* INIT */
 static int (*dss_output_drv_reg_funcs[])(void) __initdata = {
+       dss_init_platform_driver,
+       dispc_init_platform_driver,
 #ifdef CONFIG_OMAP2_DSS_DSI
        dsi_init_platform_driver,
 #endif
@@ -268,7 +270,7 @@ static int (*dss_output_drv_reg_funcs[])(void) __initdata = {
 #endif
 };
 
-static void (*dss_output_drv_unreg_funcs[])(void) __exitdata = {
+static void (*dss_output_drv_unreg_funcs[])(void) = {
 #ifdef CONFIG_OMAP5_DSS_HDMI
        hdmi5_uninit_platform_driver,
 #endif
@@ -290,10 +292,10 @@ static void (*dss_output_drv_unreg_funcs[])(void) __exitdata = {
 #ifdef CONFIG_OMAP2_DSS_DSI
        dsi_uninit_platform_driver,
 #endif
+       dispc_uninit_platform_driver,
+       dss_uninit_platform_driver,
 };
 
-static bool dss_output_drv_loaded[ARRAY_SIZE(dss_output_drv_reg_funcs)];
-
 static int __init omap_dss_init(void)
 {
        int r;
@@ -303,33 +305,20 @@ static int __init omap_dss_init(void)
        if (r)
                return r;
 
-       r = dss_init_platform_driver();
-       if (r) {
-               DSSERR("Failed to initialize DSS platform driver\n");
-               goto err_dss;
-       }
-
-       r = dispc_init_platform_driver();
-       if (r) {
-               DSSERR("Failed to initialize dispc platform driver\n");
-               goto err_dispc;
-       }
-
-       /*
-        * It's ok if the output-driver register fails. It happens, for example,
-        * when there is no output-device (e.g. SDI for OMAP4).
-        */
        for (i = 0; i < ARRAY_SIZE(dss_output_drv_reg_funcs); ++i) {
                r = dss_output_drv_reg_funcs[i]();
-               if (r == 0)
-                       dss_output_drv_loaded[i] = true;
+               if (r)
+                       goto err_reg;
        }
 
        return 0;
 
-err_dispc:
-       dss_uninit_platform_driver();
-err_dss:
+err_reg:
+       for (i = ARRAY_SIZE(dss_output_drv_reg_funcs) - i;
+                       i < ARRAY_SIZE(dss_output_drv_reg_funcs);
+                       ++i)
+               dss_output_drv_unreg_funcs[i]();
+
        platform_driver_unregister(&omap_dss_driver);
 
        return r;
@@ -339,13 +328,8 @@ static void __exit omap_dss_exit(void)
 {
        int i;
 
-       for (i = 0; i < ARRAY_SIZE(dss_output_drv_unreg_funcs); ++i) {
-               if (dss_output_drv_loaded[i])
-                       dss_output_drv_unreg_funcs[i]();
-       }
-
-       dispc_uninit_platform_driver();
-       dss_uninit_platform_driver();
+       for (i = 0; i < ARRAY_SIZE(dss_output_drv_unreg_funcs); ++i)
+               dss_output_drv_unreg_funcs[i]();
 
        platform_driver_unregister(&omap_dss_driver);
 }