OMAPDSS: RFBI: Replace dssdev->manager with dssdev->output->manager references

With addition of output entities, a device connects to an output, and an output
connects to overlay manager. Replace the dssdev->manager references with
dssdev->output->manager to access the manager correctly.

When enabling the RFBI output, check whether the output entity connected to
display is not NULL.
Signed-off-by: Archit Taneja <archit@ti.com>

drivers/video/omap2/dss/rfbi.c

@@ -312,6 +312,7 @@ static int rfbi_transfer_area(struct omap_dss_device *dssdev,
 {
 	u32 l;
 	int r;
+	struct omap_overlay_manager *mgr = dssdev->output->manager;
 	u16 width = rfbi.timings.x_res;
 	u16 height = rfbi.timings.y_res;
 
@@ -320,9 +321,9 @@ static int rfbi_transfer_area(struct omap_dss_device *dssdev,
 
 	DSSDBG("rfbi_transfer_area %dx%d\n", width, height);
 
-	dss_mgr_set_timings(dssdev->manager, &rfbi.timings);
+	dss_mgr_set_timings(mgr, &rfbi.timings);
 
-	r = dss_mgr_enable(dssdev->manager);
+	r = dss_mgr_enable(mgr);
 	if (r)
 		return r;
 
@@ -851,6 +852,7 @@ static void rfbi_dump_regs(struct seq_file *s)
 
 static void rfbi_config_lcd_manager(struct omap_dss_device *dssdev)
 {
+	struct omap_overlay_manager *mgr = dssdev->output->manager;
 	struct dss_lcd_mgr_config mgr_config;
 
 	mgr_config.io_pad_mode = DSS_IO_PAD_MODE_RFBI;
@@ -862,7 +864,7 @@ static void rfbi_config_lcd_manager(struct omap_dss_device *dssdev)
 	mgr_config.video_port_width = rfbi.pixel_size;
 	mgr_config.lcden_sig_polarity = 0;
 
-	dss_mgr_set_lcd_config(dssdev->manager, &mgr_config);
+	dss_mgr_set_lcd_config(mgr, &mgr_config);
 
 	/*
 	 * Set rfbi.timings with default values, the x_res and y_res fields
@@ -883,15 +885,16 @@ static void rfbi_config_lcd_manager(struct omap_dss_device *dssdev)
 	rfbi.timings.de_level = OMAPDSS_SIG_ACTIVE_HIGH;
 	rfbi.timings.sync_pclk_edge = OMAPDSS_DRIVE_SIG_OPPOSITE_EDGES;
 
-	dss_mgr_set_timings(dssdev->manager, &rfbi.timings);
+	dss_mgr_set_timings(mgr, &rfbi.timings);
 }
 
 int omapdss_rfbi_display_enable(struct omap_dss_device *dssdev)
 {
+	struct omap_dss_output *out = dssdev->output;
 	int r;
 
-	if (dssdev->manager == NULL) {
-		DSSERR("failed to enable display: no manager\n");
+	if (out == NULL || out->manager == NULL) {
+		DSSERR("failed to enable display: no output/manager\n");
 		return -ENODEV;
 	}