OMAPDSS: RFBI: Maintain copy of pixel size in driver data

The RFBI driver currently relies on the omap_dss_device struct to receive the
desired pixel size of the panel. This makes the RFBI interface driver dependent
on the omap_dss_device struct.

Make the RFBI driver data maintain it's own pixel format field. A panel driver
is expected to call omapdss_rfbi_set_pixel_size() 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

@@ -150,11 +150,15 @@ static void blizzard_ctrl_setup_update(struct omap_dss_device *dssdev,
 			BLIZZARD_SRC_WRITE_LCD :
 			BLIZZARD_SRC_WRITE_LCD_DESTRUCTIVE;
 
-	omap_rfbi_configure(dssdev, 16, 8);
+	omapdss_rfbi_set_pixel_size(dssdev, 16);
+
+	omap_rfbi_configure(dssdev, 8);
 
 	blizzard_write(BLIZZARD_INPUT_WIN_X_START_0, tmp, 18);
 
-	omap_rfbi_configure(dssdev, 16, 16);
+	omapdss_rfbi_set_pixel_size(dssdev, 16);
+
+	omap_rfbi_configure(dssdev, 16);
 }
 
 static void mipid_transfer(struct spi_device *spi, int cmd, const u8 *wbuf,
@@ -299,6 +303,7 @@ 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);
 
 	r = omapdss_rfbi_display_enable(dssdev);
 	if (r)

drivers/video/omap2/dss/rfbi.c

@@ -113,6 +113,7 @@ static struct {
 	struct semaphore bus_lock;
 
 	struct omap_video_timings timings;
+	int pixel_size;
 } rfbi;
 
 static inline void rfbi_write_reg(const struct rfbi_reg idx, u32 val)
@@ -764,10 +765,10 @@ static int rfbi_configure(int rfbi_module, int bpp, int lines)
 	return 0;
 }
 
-int omap_rfbi_configure(struct omap_dss_device *dssdev, int pixel_size,
-		int data_lines)
+int omap_rfbi_configure(struct omap_dss_device *dssdev, int data_lines)
 {
-	return rfbi_configure(dssdev->phy.rfbi.channel, pixel_size, data_lines);
+	return rfbi_configure(dssdev->phy.rfbi.channel, rfbi.pixel_size,
+			data_lines);
 }
 EXPORT_SYMBOL(omap_rfbi_configure);
 
@@ -785,6 +786,12 @@ void omapdss_rfbi_set_size(struct omap_dss_device *dssdev, u16 w, u16 h)
 }
 EXPORT_SYMBOL(omapdss_rfbi_set_size);
 
+void omapdss_rfbi_set_pixel_size(struct omap_dss_device *dssdev, int pixel_size)
+{
+	rfbi.pixel_size = pixel_size;
+}
+EXPORT_SYMBOL(omapdss_rfbi_set_pixel_size);
+
 static void rfbi_dump_regs(struct seq_file *s)
 {
 #define DUMPREG(r) seq_printf(s, "%-35s %08x\n", #r, rfbi_read_reg(r))
@@ -835,7 +842,7 @@ static void rfbi_config_lcd_manager(struct omap_dss_device *dssdev)
 	/* Do we need fifohandcheck for RFBI? */
 	mgr_config.fifohandcheck = false;
 
-	mgr_config.video_port_width = dssdev->ctrl.pixel_size;
+	mgr_config.video_port_width = rfbi.pixel_size;
 	mgr_config.lcden_sig_polarity = 0;
 
 	dss_mgr_set_lcd_config(dssdev->manager, &mgr_config);
@@ -890,9 +897,8 @@ int omapdss_rfbi_display_enable(struct omap_dss_device *dssdev)
 
 	rfbi_config_lcd_manager(dssdev);
 
-	rfbi_configure(dssdev->phy.rfbi.channel,
-			       dssdev->ctrl.pixel_size,
-			       dssdev->phy.rfbi.data_lines);
+	rfbi_configure(dssdev->phy.rfbi.channel, rfbi.pixel_size,
+			dssdev->phy.rfbi.data_lines);
 
 	rfbi_set_timings(dssdev->phy.rfbi.channel,
 			 &dssdev->ctrl.rfbi_timings);

include/video/omapdss.h

@@ -753,8 +753,9 @@ 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 pixel_size,
-		int data_lines);
+int omap_rfbi_configure(struct omap_dss_device *dssdev, int data_lines);
 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);
 
 #endif