OMAP: DSS2: HDMI: use default dividers

Use default regn and regm2 dividers in the hdmi driver if the board file
does not define them.

Cc: Mythri P K <mythripk@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

arch/arm/mach-omap2/board-4430sdp.c

@@ -652,15 +652,6 @@ static struct omap_dss_device sdp4430_hdmi_device = {
 	.name = "hdmi",
 	.driver_name = "hdmi_panel",
 	.type = OMAP_DISPLAY_TYPE_HDMI,
-	.clocks	= {
-		.dispc	= {
-			.dispc_fclk_src	= OMAP_DSS_CLK_SRC_FCK,
-		},
-		.hdmi	= {
-			.regn	= 15,
-			.regm2	= 1,
-		},
-	},
 	.platform_enable = sdp4430_panel_enable_hdmi,
 	.platform_disable = sdp4430_panel_disable_hdmi,
 	.channel = OMAP_DSS_CHANNEL_DIGIT,

drivers/video/omap2/dss/hdmi.c

@@ -60,6 +60,9 @@
 
 #define OMAP_HDMI_TIMINGS_NB			34
 
+#define HDMI_DEFAULT_REGN 15
+#define HDMI_DEFAULT_REGM2 1
+
 static struct {
 	struct mutex lock;
 	struct omap_display_platform_data *pdata;
@@ -418,7 +421,11 @@ static void hdmi_compute_pll(struct omap_dss_device *dssdev, int phy,
 	 * Input clock is predivided by N + 1
 	 * out put of which is reference clk
 	 */
-	pi->regn = dssdev->clocks.hdmi.regn;
+	if (dssdev->clocks.hdmi.regn == 0)
+		pi->regn = HDMI_DEFAULT_REGN;
+	else
+		pi->regn = dssdev->clocks.hdmi.regn;
+
 	refclk = clkin / (pi->regn + 1);
 
 	/*
@@ -426,7 +433,11 @@ static void hdmi_compute_pll(struct omap_dss_device *dssdev, int phy,
 	 * Multiplying by 100 to avoid fractional part removal
 	 */
 	pi->regm = (phy * 100 / (refclk)) / 100;
-	pi->regm2 = dssdev->clocks.hdmi.regm2;
+
+	if (dssdev->clocks.hdmi.regm2 == 0)
+		pi->regm2 = HDMI_DEFAULT_REGM2;
+	else
+		pi->regm2 = dssdev->clocks.hdmi.regm2;
 
 	/*
 	 * fractional multiplier is remainder of the difference between