video: mcde: Add Samsung S6D16D0 driver

ST-Ericsson ID: 365249
ST-Ericsson Linux next: NA
ST-Ericsson FOSS-OUT ID: Trivial

Change-Id: Icb611dd8a6a73fca23f56841f587db97f3400f4c
Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/33263
Reviewed-by: Marcus LORENTZON <marcus.xm.lorentzon@stericsson.com>
Tested-by: Marcus LORENTZON <marcus.xm.lorentzon@stericsson.com>
Reviewed-by: Jimmy RUBIN <jimmy.rubin@stericsson.com>
Reviewed-by: Per PERSSON <per.xb.persson@stericsson.com>
Reviewed-by: QABUILD

3 files changed, 223 insertions, 0 deletions

diff --git a/drivers/video/mcde/Kconfig b/drivers/video/mcde/Kconfig
index 94ce470c504..cb88a66d370 100644
--- a/drivers/video/mcde/Kconfig
+++ b/drivers/video/mcde/Kconfig
@@ -45,6 +45,11 @@ menu "MCDE DSI displays"
 config MCDE_DISPLAY_GENERIC_DSI
 	tristate "Generic DSI display driver"
 
+config MCDE_DISPLAY_SAMSUNG_S6D16D0
+	bool "Samsung S6D16D0 DSI display driver"
+	---help---
+	  Say Y if you have a TPO Taal or Blackpearl display panel.
+
 config MCDE_DISPLAY_SONY_ACX424AKP_DSI
 	tristate "Sony acx424akp DSI display driver"
 
diff --git a/drivers/video/mcde/Makefile b/drivers/video/mcde/Makefile
index ab86a074005..82a78c2542a 100644
--- a/drivers/video/mcde/Makefile
+++ b/drivers/video/mcde/Makefile
@@ -8,6 +8,7 @@ mcde-objs		+= mcde_debugfs.o
 obj-$(CONFIG_FB_MCDE)	+= mcde.o
 
 obj-$(CONFIG_MCDE_DISPLAY_GENERIC_DSI)		+= display-generic_dsi.o
+obj-$(CONFIG_MCDE_DISPLAY_SAMSUNG_S6D16D0)	+= display-samsung_s6d16d0.o
 obj-$(CONFIG_MCDE_DISPLAY_SONY_ACX424AKP_DSI)   += display-sony_acx424akp_dsi.o
 obj-$(CONFIG_MCDE_DISPLAY_VUIB500_DPI)		+= display-vuib500-dpi.o
 obj-$(CONFIG_MCDE_DISPLAY_AB8500_DENC)		+= display-ab8500.o
diff --git a/drivers/video/mcde/display-samsung_s6d16d0.c b/drivers/video/mcde/display-samsung_s6d16d0.c
new file mode 100644
index 00000000000..60be4e022f9
--- /dev/null
+++ b/drivers/video/mcde/display-samsung_s6d16d0.c
@@ -0,0 +1,217 @@
+/*
+ * Copyright (C) ST-Ericsson SA 2010
+ *
+ * ST-Ericsson MCDE Samsung S6D16D0 display driver
+ *
+ * Author: Marcus Lorentzon <marcus.xm.lorentzon@stericsson.com>
+ * for ST-Ericsson.
+ *
+ * License terms: GNU General Public License (GPL), version 2.
+ */
+
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/regulator/consumer.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/gpio.h>
+#include <linux/err.h>
+
+#include <video/mcde_display.h>
+
+#define RESET_DURATION_US	10
+#define RESET_DELAY_MS		120
+#define SLEEP_OUT_DELAY_MS	120
+#define IO_REGU			"vdd1"
+#define IO_REGU_MIN		1650000
+#define IO_REGU_MAX		3300000
+
+struct device_info {
+	int reset_gpio;
+	struct mcde_port port;
+	struct regulator *regulator;
+};
+
+static inline struct device_info *get_drvdata(struct mcde_display_device *ddev)
+{
+	return (struct device_info *)dev_get_drvdata(&ddev->dev);
+}
+
+static int power_on(struct mcde_display_device *ddev)
+{
+	struct device_info *di = get_drvdata(ddev);
+
+	dev_dbg(&ddev->dev, "Reset & power on s6d16d0 display\n");
+
+	regulator_enable(di->regulator);
+	gpio_set_value_cansleep(di->reset_gpio, 0);
+	udelay(RESET_DURATION_US);
+	gpio_set_value_cansleep(di->reset_gpio, 1);
+	msleep(RESET_DELAY_MS);
+
+	return 0;
+}
+
+static int power_off(struct mcde_display_device *ddev)
+{
+	struct device_info *di = get_drvdata(ddev);
+
+	dev_dbg(&ddev->dev, "Power off s6d16d0 display\n");
+
+	regulator_disable(di->regulator);
+
+	return 0;
+}
+
+static int display_on(struct mcde_display_device *ddev)
+{
+	int ret;
+
+	dev_dbg(&ddev->dev, "Display on s6d16d0\n");
+
+	ret = mcde_dsi_dcs_write(ddev->chnl_state, DCS_CMD_EXIT_SLEEP_MODE,
+								NULL, 0);
+	if (ret)
+		return ret;
+	msleep(SLEEP_OUT_DELAY_MS);
+	return mcde_dsi_dcs_write(ddev->chnl_state, DCS_CMD_SET_DISPLAY_ON,
+								NULL, 0);
+}
+
+static int display_off(struct mcde_display_device *ddev)
+{
+	int ret;
+
+	dev_dbg(&ddev->dev, "Display off s6d16d0\n");
+
+	ret = mcde_dsi_dcs_write(ddev->chnl_state, DCS_CMD_SET_DISPLAY_OFF,
+								NULL, 0);
+	if (ret)
+		return ret;
+
+	return mcde_dsi_dcs_write(ddev->chnl_state, DCS_CMD_ENTER_SLEEP_MODE,
+								NULL, 0);
+}
+
+static int set_power_mode(struct mcde_display_device *ddev,
+					enum mcde_display_power_mode power_mode)
+{
+	int ret = 0;
+
+	dev_dbg(&ddev->dev, "Set power mode %d\n", power_mode);
+
+	/* OFF -> STANDBY */
+	if (ddev->power_mode == MCDE_DISPLAY_PM_OFF &&
+					power_mode != MCDE_DISPLAY_PM_OFF) {
+		ret = power_on(ddev);
+		if (ret)
+			return ret;
+		ddev->power_mode = MCDE_DISPLAY_PM_STANDBY;
+	}
+
+	/* STANDBY -> ON */
+	if (ddev->power_mode == MCDE_DISPLAY_PM_STANDBY &&
+					power_mode == MCDE_DISPLAY_PM_ON) {
+
+		ret = display_on(ddev);
+		if (ret)
+			return ret;
+		ddev->power_mode = MCDE_DISPLAY_PM_ON;
+	}
+	/* ON -> STANDBY */
+	else if (ddev->power_mode == MCDE_DISPLAY_PM_ON &&
+					power_mode <= MCDE_DISPLAY_PM_STANDBY) {
+
+		ret = display_off(ddev);
+		if (ret)
+			return ret;
+		ddev->power_mode = MCDE_DISPLAY_PM_STANDBY;
+	}
+
+	/* STANDBY -> OFF */
+	if (ddev->power_mode == MCDE_DISPLAY_PM_STANDBY &&
+					power_mode == MCDE_DISPLAY_PM_OFF) {
+		ret = power_off(ddev);
+		if (ret)
+			return ret;
+		ddev->power_mode = MCDE_DISPLAY_PM_OFF;
+	}
+
+	return mcde_chnl_set_power_mode(ddev->chnl_state, ddev->power_mode);
+}
+
+static int __devinit samsung_s6d16d0_probe(struct mcde_display_device *ddev)
+{
+	int ret = 0;
+	struct mcde_display_dsi_platform_data *pdata = ddev->dev.platform_data;
+	struct device_info *di;
+
+	if (pdata == NULL || !pdata->reset_gpio) {
+		dev_err(&ddev->dev, "Invalid platform data\n");
+		return -EINVAL;
+	}
+
+	di = kzalloc(sizeof(*di), GFP_KERNEL);
+	if (!di)
+		return -ENOMEM;
+	di->reset_gpio = pdata->reset_gpio;
+	di->port.link = pdata->link;
+	di->port.type = MCDE_PORTTYPE_DSI;
+	di->port.mode = MCDE_PORTMODE_CMD;
+	di->port.pixel_format = MCDE_PORTPIXFMT_DSI_24BPP;
+	di->port.sync_src = MCDE_SYNCSRC_BTA;
+	di->port.phy.dsi.num_data_lanes = 2;
+	/* TODO: Move UI to mcde_hw.c when clk_get_rate(dsi) is done */
+	di->port.phy.dsi.ui = 9;
+
+	ret = gpio_request(di->reset_gpio, NULL);
+	if (ret)
+		goto gpio_request_failed;
+	gpio_direction_output(di->reset_gpio, 1);
+	di->regulator = regulator_get(&ddev->dev, IO_REGU);
+	if (IS_ERR(di->regulator)) {
+		di->regulator = NULL;
+		goto regulator_get_failed;
+	}
+	ret = regulator_set_voltage(di->regulator, IO_REGU_MIN, IO_REGU_MAX);
+	if (WARN_ON(ret))
+		goto regulator_voltage_failed;
+
+	/* Get in sync with u-boot */
+	if (ddev->power_mode == MCDE_DISPLAY_PM_STANDBY)
+		(void)regulator_enable(di->regulator);
+
+	ddev->set_power_mode = set_power_mode;
+	ddev->port = &di->port;
+	ddev->native_x_res = 864;
+	ddev->native_y_res = 480;
+	dev_set_drvdata(&ddev->dev, di);
+
+	dev_info(&ddev->dev, "Samsung s6d16d0 display probed\n");
+
+	return 0;
+regulator_voltage_failed:
+	regulator_put(di->regulator);
+regulator_get_failed:
+	gpio_free(di->reset_gpio);
+gpio_request_failed:
+	kfree(di);
+	return ret;
+}
+
+static struct mcde_display_driver samsung_s6d16d0_driver = {
+	.probe	= samsung_s6d16d0_probe,
+	.driver = {
+		.name	= "samsung_s6d16d0",
+	},
+};
+
+static int __init samsung_s6d16d0_init(void)
+{
+	return mcde_display_driver_register(&samsung_s6d16d0_driver);
+}
+module_init(samsung_s6d16d0_init);
+
+MODULE_AUTHOR("Marcus Lorentzon <marcus.xm.lorentzon@stericsson.com>");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("ST-Ericsson MCDE Samsung S6D16D0 display driver");