ENGR00177737-2: add HDMI sii902x support in mx6q-arm2

test with
video=mxcfb0:dev=sii902x_hdmi,1024x768M@60,if=RGB24 disable_mipi_dsi

Note:
1. currently we use the same ipu setting port with on chip HDMI,
if we need coexist need change the on chip HDMI ipu settings.
2. need remove MIPI DSI initial with 'disable_mipi_dsi' in kernel command line,
as mipi dsi reset will reset on board sii902x as well.
3. change the I2C2 work at 100K not 400K, to be compatible with EDID spec.
4. the side effect is that Sii902x will have to use "sii902x_hdmi",
instead of "hdmi" as before

Signed-off-by: Hake Huang <b20222@freescale.com>

1 files changed, 57 insertions, 6 deletions

diff --git a/arch/arm/mach-mx6/board-mx6q_arm2.c b/arch/arm/mach-mx6/board-mx6q_arm2.c
index 2b786b10f39c..dc4218ab8fca 100644
--- a/arch/arm/mach-mx6/board-mx6q_arm2.c
+++ b/arch/arm/mach-mx6/board-mx6q_arm2.c
@@ -158,6 +158,7 @@ static int esai_record;
 static int sgtl5000_en;
 static int spdif_en;
 static int flexcan_en;
+static int disable_mipi_dsi;
 
 extern struct regulator *(*get_cpu_regulator)(void);
 extern void (*put_cpu_regulator)(void);
@@ -826,6 +827,38 @@ static int __init max17135_regulator_init(struct max17135 *max17135)
 	return 0;
 }
 
+static int sii902x_get_pins(void)
+{
+	/* Sii902x HDMI controller */
+	gpio_request(MX6_ARM2_DISP0_RESET, "disp0-reset");
+	gpio_direction_output(MX6_ARM2_DISP0_RESET, 0);
+	gpio_request(MX6_ARM2_DISP0_DET_INT, "disp0-detect");
+	gpio_direction_input(MX6_ARM2_DISP0_DET_INT);
+	return 1;
+}
+
+static void sii902x_put_pins(void)
+{
+	gpio_free(MX6_ARM2_DISP0_RESET);
+	gpio_free(MX6_ARM2_DISP0_DET_INT);
+}
+
+static void sii902x_hdmi_reset(void)
+{
+       gpio_set_value(MX6_ARM2_DISP0_RESET, 0);
+       msleep(10);
+       gpio_set_value(MX6_ARM2_DISP0_RESET, 1);
+       msleep(10);
+}
+
+static struct fsl_mxc_lcd_platform_data sii902x_hdmi_data = {
+	.ipu_id = 0,
+	.disp_id = 0,
+	.reset = sii902x_hdmi_reset,
+	.get_pins = sii902x_get_pins,
+	.put_pins = sii902x_put_pins,
+};
+
 static struct i2c_board_info mxc_i2c0_board_info[] __initdata = {
 	{
 		I2C_BOARD_INFO("cs42888", 0x48),
@@ -868,8 +901,11 @@ static struct i2c_board_info mxc_i2c2_board_info[] __initdata = {
 	}, {
 		I2C_BOARD_INFO("egalax_ts", 0x4),
 		.irq = gpio_to_irq(MX6_ARM2_CAP_TCH_INT),
+	}, {
+		I2C_BOARD_INFO("sii902x", 0x39),
+		.platform_data = &sii902x_hdmi_data,
+		.irq = gpio_to_irq(MX6_ARM2_DISP0_DET_INT),
 	},
-
 };
 
 static struct i2c_board_info mxc_i2c1_board_info[] __initdata = {
@@ -1884,6 +1920,16 @@ static struct mxc_spdif_platform_data mxc_spdif_data = {
 	.spdif_clk		= NULL, /* spdif bus clk */
 };
 
+static int __init early_disable_mipi_dsi(char *p)
+{
+	/*enable on board HDMI*/
+	/*mulplex pin with mipi disp0_reset we should disable mipi reset*/
+	disable_mipi_dsi = 1;
+	return 0;
+}
+
+early_param("disable_mipi_dsi", early_disable_mipi_dsi);
+
 /*!
  * Board specific initialization.
  */
@@ -1998,11 +2044,13 @@ static void __init mx6_arm2_init(void)
 		ldb_data.disp_id = 0;
 		for (i = 0; i < ARRAY_SIZE(sabr_fb_data) / 2; i++)
 			imx6q_add_ipuv3fb(i, &sabr_fb_data[i]);
-	} else
+	} else {
 		for (i = 0; i < ARRAY_SIZE(sabr_fb_data); i++)
 			imx6q_add_ipuv3fb(i, &sabr_fb_data[i]);
+	}
 
-	imx6q_add_mipi_dsi(&mipi_dsi_pdata);
+	if (!disable_mipi_dsi)
+		imx6q_add_mipi_dsi(&mipi_dsi_pdata);
 	imx6q_add_lcdif(&lcdif_data);
 	imx6q_add_ldb(&ldb_data);
 	imx6q_add_v4l2_output(0);
@@ -2017,6 +2065,8 @@ static void __init mx6_arm2_init(void)
 	i2c_register_board_info(1, mxc_i2c1_board_info,
 			ARRAY_SIZE(mxc_i2c1_board_info));
 	if (!spdif_en) {
+		if (disable_mipi_dsi)
+			mx6_arm2_i2c2_data.bitrate = 100000;
 		imx6q_add_imx_i2c(2, &mx6_arm2_i2c2_data);
 		i2c_register_board_info(2, mxc_i2c2_board_info,
 				ARRAY_SIZE(mxc_i2c2_board_info));
@@ -2054,9 +2104,10 @@ static void __init mx6_arm2_init(void)
 	gpio_direction_output(MX6_ARM2_DISP0_RESET, 0);
 
 	/* DISP0 I2C enable */
-	gpio_request(MX6_ARM2_DISP0_I2C_EN, "disp0-i2c");
-	gpio_direction_output(MX6_ARM2_DISP0_I2C_EN, 0);
-
+	if (!disable_mipi_dsi) {
+		gpio_request(MX6_ARM2_DISP0_I2C_EN, "disp0-i2c");
+		gpio_direction_output(MX6_ARM2_DISP0_I2C_EN, 0);
+	}
 	gpio_request(MX6_ARM2_DISP0_PWR, "disp0-pwr");
 	gpio_direction_output(MX6_ARM2_DISP0_PWR, 1);