OMAPDSS: RFBI: Maintain copy of number of data lines in driver data

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

Make the RFBI driver data maintain it's own data lines field. A panel driver
is expected to call omapdss_rfbi_set_data_lines() to configure the pixel format
before enabling the interface or calling omap_rfbi_configure().

Signed-off-by: Archit Taneja <archit@ti.com>

drivers/video/omap2/displays/panel-n8x0.c

@@ -151,14 +151,16 @@ static void blizzard_ctrl_setup_update(struct omap_dss_device *dssdev,
 			BLIZZARD_SRC_WRITE_LCD_DESTRUCTIVE;
 
 	omapdss_rfbi_set_pixel_size(dssdev, 16);
+	omapdss_rfbi_set_data_lines(dssdev, 8);
 
-	omap_rfbi_configure(dssdev, 8);
+	omap_rfbi_configure(dssdev);
 
 	blizzard_write(BLIZZARD_INPUT_WIN_X_START_0, tmp, 18);
 
 	omapdss_rfbi_set_pixel_size(dssdev, 16);
+	omapdss_rfbi_set_data_lines(dssdev, 16);
 
-	omap_rfbi_configure(dssdev, 16);
+	omap_rfbi_configure(dssdev);
 }
 
 static void mipid_transfer(struct spi_device *spi, int cmd, const u8 *wbuf,
@@ -304,6 +306,7 @@ static int n8x0_panel_power_on(struct omap_dss_device *dssdev)
 	omapdss_rfbi_set_size(dssdev, dssdev->panel.timings.x_res,
 		dssdev->panel.timings.y_res);
 	omapdss_rfbi_set_pixel_size(dssdev, dssdev->ctrl.pixel_size);
+	omapdss_rfbi_set_data_lines(dssdev, dssdev->phy.rfbi.data_lines);
 
 	r = omapdss_rfbi_display_enable(dssdev);
 	if (r)

drivers/video/omap2/dss/rfbi.c

@@ -114,6 +114,7 @@ static struct {
 
 	struct omap_video_timings timings;
 	int pixel_size;
+	int data_lines;
 } rfbi;
 
 static inline void rfbi_write_reg(const struct rfbi_reg idx, u32 val)
@@ -765,10 +766,10 @@ static int rfbi_configure(int rfbi_module, int bpp, int lines)
 	return 0;
 }
 
-int omap_rfbi_configure(struct omap_dss_device *dssdev, int data_lines)
+int omap_rfbi_configure(struct omap_dss_device *dssdev)
 {
 	return rfbi_configure(dssdev->phy.rfbi.channel, rfbi.pixel_size,
-			data_lines);
+			rfbi.data_lines);
 }
 EXPORT_SYMBOL(omap_rfbi_configure);
 
@@ -792,6 +793,12 @@ void omapdss_rfbi_set_pixel_size(struct omap_dss_device *dssdev, int pixel_size)
 }
 EXPORT_SYMBOL(omapdss_rfbi_set_pixel_size);
 
+void omapdss_rfbi_set_data_lines(struct omap_dss_device *dssdev, int data_lines)
+{
+	rfbi.data_lines = data_lines;
+}
+EXPORT_SYMBOL(omapdss_rfbi_set_data_lines);
+
 static void rfbi_dump_regs(struct seq_file *s)
 {
 #define DUMPREG(r) seq_printf(s, "%-35s %08x\n", #r, rfbi_read_reg(r))
@@ -898,7 +905,7 @@ int omapdss_rfbi_display_enable(struct omap_dss_device *dssdev)
 	rfbi_config_lcd_manager(dssdev);
 
 	rfbi_configure(dssdev->phy.rfbi.channel, rfbi.pixel_size,
-			dssdev->phy.rfbi.data_lines);
+			rfbi.data_lines);
 
 	rfbi_set_timings(dssdev->phy.rfbi.channel,
 			 &dssdev->ctrl.rfbi_timings);

include/video/omapdss.h

@@ -753,9 +753,11 @@ int omapdss_rfbi_display_enable(struct omap_dss_device *dssdev);
 void omapdss_rfbi_display_disable(struct omap_dss_device *dssdev);
 int omap_rfbi_update(struct omap_dss_device *dssdev, void (*callback)(void *),
 		void *data);
-int omap_rfbi_configure(struct omap_dss_device *dssdev, int data_lines);
+int omap_rfbi_configure(struct omap_dss_device *dssdev);
 void omapdss_rfbi_set_size(struct omap_dss_device *dssdev, u16 w, u16 h);
 void omapdss_rfbi_set_pixel_size(struct omap_dss_device *dssdev,
 		int pixel_size);
+void omapdss_rfbi_set_data_lines(struct omap_dss_device *dssdev,
+		int data_lines);
 
 #endif