OMAPDSS: SDI: Maintain copy of data pairs in driver data

The SDI driver currently relies on the omap_dss_device struct to configure the
number of data pairs as specified by the panel. This makes the SDI interface
driver dependent on the omap_dss_device struct.

Make the SDI driver data maintain it's own data lines field. A panel driver
is expected to call omapdss_sdi_set_datapairs() before enabling the interface.
Even though we configure the number of data pairs here, this function would be
finally mapped to a generic interface op called set_data_lines. The datapairs
argument type has been changed from u8 to int at some places to be in sync with
the 'set_data_lines' ops of other interfaces.
Signed-off-by: Archit Taneja <archit@ti.com>

drivers/video/omap2/displays/panel-acx565akm.c

@@ -601,6 +601,7 @@ static int acx_panel_power_on(struct omap_dss_device *dssdev)
 	mutex_lock(&md->mutex);
 
 	omapdss_sdi_set_timings(dssdev, &dssdev->panel.timings);
+	omapdss_sdi_set_datapairs(dssdev, dssdev->phy.sdi.datapairs);
 
 	r = omapdss_sdi_display_enable(dssdev);
 	if (r) {

drivers/video/omap2/dss/dss.c

@@ -144,7 +144,7 @@ static void dss_restore_context(void)
 #undef SR
 #undef RR
 
-void dss_sdi_init(u8 datapairs)
+void dss_sdi_init(int datapairs)
 {
 	u32 l;
 

drivers/video/omap2/dss/dss.h

@@ -279,7 +279,7 @@ void dss_dump_clocks(struct seq_file *s);
 void dss_debug_dump_clocks(struct seq_file *s);
 #endif
 
-void dss_sdi_init(u8 datapairs);
+void dss_sdi_init(int datapairs);
 int dss_sdi_enable(void);
 void dss_sdi_disable(void);
 

drivers/video/omap2/dss/sdi.c

@@ -35,6 +35,7 @@ static struct {
 
 	struct dss_lcd_mgr_config mgr_config;
 	struct omap_video_timings timings;
+	int datapairs;
 } sdi;
 
 static void sdi_config_lcd_manager(struct omap_dss_device *dssdev)
@@ -106,7 +107,8 @@ int omapdss_sdi_display_enable(struct omap_dss_device *dssdev)
 
 	sdi_config_lcd_manager(dssdev);
 
-	dss_sdi_init(dssdev->phy.sdi.datapairs);
+	dss_sdi_init(sdi.datapairs);
+
 	r = dss_sdi_enable();
 	if (r)
 		goto err_sdi_enable;
@@ -164,6 +166,12 @@ void omapdss_sdi_set_timings(struct omap_dss_device *dssdev,
 }
 EXPORT_SYMBOL(omapdss_sdi_set_timings);
 
+void omapdss_sdi_set_datapairs(struct omap_dss_device *dssdev, int datapairs)
+{
+	sdi.datapairs = datapairs;
+}
+EXPORT_SYMBOL(omapdss_sdi_set_datapairs);
+
 static int __init sdi_init_display(struct omap_dss_device *dssdev)
 {
 	DSSDBG("SDI init\n");

include/video/omapdss.h

@@ -749,6 +749,7 @@ int omapdss_sdi_display_enable(struct omap_dss_device *dssdev);
 void omapdss_sdi_display_disable(struct omap_dss_device *dssdev);
 void omapdss_sdi_set_timings(struct omap_dss_device *dssdev,
 		struct omap_video_timings *timings);
+void omapdss_sdi_set_datapairs(struct omap_dss_device *dssdev, int datapairs);
 
 int omapdss_rfbi_display_enable(struct omap_dss_device *dssdev);
 void omapdss_rfbi_display_disable(struct omap_dss_device *dssdev);