mx6sabresd: Fix wrong colors in LVDS splash

Currently HDMI splash screen is selected by default on mx6sabresd boards.

As LVDS is also enabled, this causes incorrect colors to be displayed im the
LVDS panel.

Fix this by selecting the LVDS panel as the default splash output and only keep
HDMI or LVDS turned on at the same time.

Acked-by: Liu Ying <Ying.Liu@freescale.com>
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>

board/freescale/mx6sabresd/mx6sabresd.c

@@ -249,8 +249,22 @@ static int detect_hdmi(struct display_info_t const *dev)
 	return readb(&hdmi->phy_stat0) & HDMI_DVI_STAT;
 }
 
+
+static void disable_lvds(struct display_info_t const *dev)
+{
+	struct iomuxc *iomux = (struct iomuxc *)IOMUXC_BASE_ADDR;
+
+	int reg = readl(&iomux->gpr[2]);
+
+	reg &= ~(IOMUXC_GPR2_LVDS_CH0_MODE_MASK |
+		 IOMUXC_GPR2_LVDS_CH1_MODE_MASK);
+
+	writel(reg, &iomux->gpr[2]);
+}
+
 static void do_enable_hdmi(struct display_info_t const *dev)
 {
+	disable_lvds(dev);
 	imx_enable_hdmi_phy();
 }
 
@@ -263,14 +277,15 @@ static void enable_lvds(struct display_info_t const *dev)
 	       IOMUXC_GPR2_DATA_WIDTH_CH1_24BIT;
 	writel(reg, &iomux->gpr[2]);
 }
+
 static struct display_info_t const displays[] = {{
 	.bus	= -1,
 	.addr	= 0,
-	.pixfmt	= IPU_PIX_FMT_RGB24,
-	.detect	= detect_hdmi,
-	.enable	= do_enable_hdmi,
+	.pixfmt	= IPU_PIX_FMT_LVDS666,
+	.detect	= NULL,
+	.enable	= enable_lvds,
 	.mode	= {
-		.name           = "HDMI",
+		.name           = "Hannstar-XGA",
 		.refresh        = 60,
 		.xres           = 1024,
 		.yres           = 768,
@@ -286,11 +301,11 @@ static struct display_info_t const displays[] = {{
 } }, {
 	.bus	= -1,
 	.addr	= 0,
-	.pixfmt	= IPU_PIX_FMT_LVDS666,
-	.detect	= NULL,
-	.enable	= enable_lvds,
+	.pixfmt	= IPU_PIX_FMT_RGB24,
+	.detect	= detect_hdmi,
+	.enable	= do_enable_hdmi,
 	.mode	= {
-		.name           = "Hannstar-XGA",
+		.name           = "HDMI",
 		.refresh        = 60,
 		.xres           = 1024,
 		.yres           = 768,