ENGR00219872-2 MX6Q SabreSD:Disable LVDS CABC function

This patch sets CABC_EN0/1 to low to disable LVDS panel
CABC function so that LVDS backlight will not be turned
by the LVDS panel automatically so that we may avoid
annoying unstable backlight issue.
Signed-off-by: Rong Dian <b38775@freescale.com>
Signed-off-by: Liu Ying <Ying.Liu@freescale.com>
(cherry picked from commit a169940fb39216e644018304e3a3bdaca61ea88a)

arch/arm/mach-mx6/board-mx6q_sabresd.c

@@ -1779,6 +1779,17 @@ static void __init mx6_sabresd_board_init(void)
 	imx_asrc_data.asrc_audio_clk = clk_get(NULL, "asrc_serial_clk");
 	imx6q_add_asrc(&imx_asrc_data);
 
+	/*
+	 * Disable HannStar touch panel CABC function,
+	 * this function turns the panel's backlight automatically
+	 * according to the content shown on the panel which
+	 * may cause annoying unstable backlight issue.
+	 */
+	gpio_request(SABRESD_CABC_EN0, "cabc-en0");
+	gpio_direction_output(SABRESD_CABC_EN0, 0);
+	gpio_request(SABRESD_CABC_EN1, "cabc-en1");
+	gpio_direction_output(SABRESD_CABC_EN1, 0);
+
 	imx6q_add_mxc_pwm(0);
 	imx6q_add_mxc_pwm(1);
 	imx6q_add_mxc_pwm(2);