OMAP: DSS2: Fix: Return correct lcd clock source for OMAP2/3

dss.lcd_clk_source is set to the default value DSS_CLK_SRC_FCK at dss_init.
For OMAP2 and OMAP3, the dss.lcd_clk_source should always be the same as
dss.dispc_clk_source. The function dss_get_lcd_clk_source() always returns the
default value DSS_CLK_SRC_FCK for OMAP2/3. This leads to wrong clock dumps when
dispc_clk_source is not DSS_CLK_SRC_FCK.

Correct this function to always return dss.dispc_clk_source for OMAP2/3.
Signed-off-by: NArchit Taneja <archit@ti.com>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

drivers/video/omap2/dss/dss.c

@@ -385,8 +385,14 @@ enum dss_clk_source dss_get_dsi_clk_source(void)
 
 enum dss_clk_source dss_get_lcd_clk_source(enum omap_channel channel)
 {
-	int ix = channel == OMAP_DSS_CHANNEL_LCD ? 0 : 1;
-	return dss.lcd_clk_source[ix];
+	if (dss_has_feature(FEAT_LCD_CLK_SRC)) {
+		int ix = channel == OMAP_DSS_CHANNEL_LCD ? 0 : 1;
+		return dss.lcd_clk_source[ix];
+	} else {
+		/* LCD_CLK source is the same as DISPC_FCLK source for
+		 * OMAP2 and OMAP3 */
+		return dss.dispc_clk_source;
+	}
 }
 
 /* calculate clock rates using dividers in cinfo */