OMAPDSS: Panel NEC: Set omap_dss_device states correctly

The display state parameter of omap_dss_device struct is not being set correctly
in the panel driver NEC panel driver panel-nec-nl8048hl11-01b.c. Set the correct
states in the panel's enable/disable/suspend/resume functions.

CC: Erik Gilling <konkers@android.com>
Signed-off-by: Archit Taneja <archit@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

1 files changed, 52 insertions, 9 deletions

diff --git a/drivers/video/omap2/displays/panel-nec-nl8048hl11-01b.c b/drivers/video/omap2/displays/panel-nec-nl8048hl11-01b.c
index 2ba9d0ca187c..94e0f207342e 100644
--- a/drivers/video/omap2/displays/panel-nec-nl8048hl11-01b.c
+++ b/drivers/video/omap2/displays/panel-nec-nl8048hl11-01b.c
@@ -163,50 +163,93 @@ static void nec_8048_panel_remove(struct omap_dss_device *dssdev)
         kfree(necd);
 }
 
-static int nec_8048_panel_enable(struct omap_dss_device *dssdev)
+static int nec_8048_panel_power_on(struct omap_dss_device *dssdev)
 {
-        int r = 0;
+        int r;
         struct nec_8048_data *necd = dev_get_drvdata(&dssdev->dev);
         struct backlight_device *bl = necd->bl;
 
+        if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
+                return 0;
+
+        r = omapdss_dpi_display_enable(dssdev);
+        if (r)
+                goto err0;
+
         if (dssdev->platform_enable) {
                 r = dssdev->platform_enable(dssdev);
                 if (r)
-                        return r;
+                        goto err1;
         }
 
         r = nec_8048_bl_update_status(bl);
         if (r < 0)
                 dev_err(&dssdev->dev, "failed to set lcd brightness\n");
 
-        r = omapdss_dpi_display_enable(dssdev);
-
+        return 0;
+err1:
+        omapdss_dpi_display_disable(dssdev);
+err0:
         return r;
 }
 
-static void nec_8048_panel_disable(struct omap_dss_device *dssdev)
+static void nec_8048_panel_power_off(struct omap_dss_device *dssdev)
 {
         struct nec_8048_data *necd = dev_get_drvdata(&dssdev->dev);
         struct backlight_device *bl = necd->bl;
 
-        omapdss_dpi_display_disable(dssdev);
+        if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
+                return;
 
         bl->props.brightness = 0;
         nec_8048_bl_update_status(bl);
 
         if (dssdev->platform_disable)
                 dssdev->platform_disable(dssdev);
+
+        omapdss_dpi_display_disable(dssdev);
+}
+
+static int nec_8048_panel_enable(struct omap_dss_device *dssdev)
+{
+        int r;
+
+        r = nec_8048_panel_power_on(dssdev);
+        if (r)
+                return r;
+
+        dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
+
+        return 0;
+}
+
+static void nec_8048_panel_disable(struct omap_dss_device *dssdev)
+{
+        nec_8048_panel_power_off(dssdev);
+
+        dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
 }
 
 static int nec_8048_panel_suspend(struct omap_dss_device *dssdev)
 {
-        nec_8048_panel_disable(dssdev);
+        nec_8048_panel_power_off(dssdev);
+
+        dssdev->state = OMAP_DSS_DISPLAY_SUSPENDED;
+
         return 0;
 }
 
 static int nec_8048_panel_resume(struct omap_dss_device *dssdev)
 {
-        return nec_8048_panel_enable(dssdev);
+        int r;
+
+        r = nec_8048_panel_power_on(dssdev);
+        if (r)
+                return r;
+
+        dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
+
+        return 0;
 }
 
 static int nec_8048_recommended_bpp(struct omap_dss_device *dssdev)