arm: tegra: enterprise: Controls for 3d barrier

Adds userspace control for 3d barrier on 3d panel found on enterprise.
Provides 2 sysfs files:

/sys/devices/nvhost/tergradc/stereo_mode
/sys/devices/nvhost/tergradc/stereo_orientation

These are used to enable/disable 3d barrier and control it's
orientation, respectively.

Change-Id: I580f0992c19cbee9a695bac9bef503c9888abc83
Reviewed-on: http://git-master/r/32575
Reviewed-by: Niket Sirsi <nsirsi@nvidia.com>
Tested-by: Niket Sirsi <nsirsi@nvidia.com>

4 files changed, 190 insertions, 14 deletions

diff --git a/arch/arm/mach-tegra/board-enterprise-panel.c b/arch/arm/mach-tegra/board-enterprise-panel.c
index f15a0cc865a2..f4f70d051649 100644
--- a/arch/arm/mach-tegra/board-enterprise-panel.c
+++ b/arch/arm/mach-tegra/board-enterprise-panel.c
@@ -44,15 +44,21 @@
 #define DSI_PANEL_RESET 0
 
 #define enterprise_lvds_shutdown	TEGRA_GPIO_PL2
-#define enterprise_bl_enb		TEGRA_GPIO_PH2
-#define enterprise_bl_pwm		TEGRA_GPIO_PH0
 #define enterprise_hdmi_hpd		TEGRA_GPIO_PN7
 
 #define enterprise_dsi_panel_reset	TEGRA_GPIO_PW0
 
-static struct regulator *enterprise_hdmi_reg = NULL;
-static struct regulator *enterprise_hdmi_pll = NULL;
-static struct regulator *enterprise_hdmi_vddio = NULL;
+#define enterprise_lcd_2d_3d		TEGRA_GPIO_PH1
+#define ENTERPRISE_STEREO_3D		0
+#define ENTERPRISE_STEREO_2D		1
+
+#define enterprise_lcd_swp_pl		TEGRA_GPIO_PH2
+#define ENTERPRISE_STEREO_LANDSCAPE	0
+#define ENTERPRISE_STEREO_PORTRAIT	1
+
+static struct regulator *enterprise_hdmi_reg;
+static struct regulator *enterprise_hdmi_pll;
+static struct regulator *enterprise_hdmi_vddio;
 
 static atomic_t sd_brightness = ATOMIC_INIT(255);
 
@@ -293,6 +299,30 @@ static int enterprise_dsi_panel_disable(void)
 	return 0;
 }
 
+static void enterprise_stereo_set_mode(int mode)
+{
+	switch (mode) {
+	case TEGRA_DC_STEREO_MODE_2D:
+		gpio_set_value(TEGRA_GPIO_PH1, ENTERPRISE_STEREO_2D);
+		break;
+	case TEGRA_DC_STEREO_MODE_3D:
+		gpio_set_value(TEGRA_GPIO_PH1, ENTERPRISE_STEREO_3D);
+		break;
+	}
+}
+
+static void enterprise_stereo_set_orientation(int mode)
+{
+	switch (mode) {
+	case TEGRA_DC_STEREO_LANDSCAPE:
+		gpio_set_value(TEGRA_GPIO_PH2, ENTERPRISE_STEREO_LANDSCAPE);
+		break;
+	case TEGRA_DC_STEREO_PORTRAIT:
+		gpio_set_value(TEGRA_GPIO_PH2, ENTERPRISE_STEREO_PORTRAIT);
+		break;
+	}
+}
+
 static struct tegra_dsi_cmd dsi_init_cmd[]= {
 	DSI_CMD_SHORT(0x05, 0x11, 0x00),
 	DSI_DLY_MS(150),
@@ -314,6 +344,11 @@ struct tegra_dsi_out enterprise_dsi = {
 	.video_data_type = TEGRA_DSI_VIDEO_TYPE_COMMAND_MODE,
 };
 
+static struct tegra_stereo_out enterprise_stereo = {
+	.set_mode		= &enterprise_stereo_set_mode,
+	.set_orientation	= &enterprise_stereo_set_orientation,
+};
+
 static struct tegra_dc_mode enterprise_dsi_modes[] = {
 	{
 		.pclk = 10000000,
@@ -346,10 +381,11 @@ static struct tegra_dc_out enterprise_disp1_out = {
 
 	.type		= TEGRA_DC_OUT_DSI,
 
-	.modes	 	= enterprise_dsi_modes,
-	.n_modes 	= ARRAY_SIZE(enterprise_dsi_modes),
+	.modes		= enterprise_dsi_modes,
+	.n_modes	= ARRAY_SIZE(enterprise_dsi_modes),
 
 	.dsi		= &enterprise_dsi,
+	.stereo		= &enterprise_stereo,
 
 	.enable		= enterprise_dsi_panel_enable,
 	.disable	= enterprise_dsi_panel_disable,
@@ -462,6 +498,17 @@ int __init enterprise_panel_init(void)
 	gpio_request(enterprise_hdmi_hpd, "hdmi_hpd");
 	gpio_direction_input(enterprise_hdmi_hpd);
 
+	tegra_gpio_enable(enterprise_lcd_2d_3d);
+	gpio_request(enterprise_lcd_2d_3d, "lcd_2d_3d");
+	gpio_direction_output(enterprise_lcd_2d_3d, 0);
+	enterprise_stereo_set_mode(enterprise_stereo.mode_2d_3d);
+
+	tegra_gpio_enable(enterprise_lcd_swp_pl);
+	gpio_request(enterprise_lcd_swp_pl, "lcd_swp_pl");
+	gpio_direction_output(enterprise_lcd_swp_pl, 0);
+	enterprise_stereo_set_orientation(enterprise_stereo.orientation);
+
+
 #ifdef CONFIG_HAS_EARLYSUSPEND
 	enterprise_panel_early_suspender.suspend = enterprise_panel_early_suspend;
 	enterprise_panel_early_suspender.resume = enterprise_panel_late_resume;
diff --git a/arch/arm/mach-tegra/board-enterprise-pinmux.c b/arch/arm/mach-tegra/board-enterprise-pinmux.c
index 70fab892d192..dc4a5c28e90d 100644
--- a/arch/arm/mach-tegra/board-enterprise-pinmux.c
+++ b/arch/arm/mach-tegra/board-enterprise-pinmux.c
@@ -266,8 +266,9 @@ static __initdata struct tegra_pingroup_config enterprise_pinmux[] = {
 	DEFAULT_PINMUX(GMI_WP_N,        RSVD1,           NORMAL,    NORMAL,     INPUT),
 	DEFAULT_PINMUX(GMI_CS2_N,       NAND,            NORMAL,    NORMAL,     OUTPUT),
 	DEFAULT_PINMUX(GMI_RST_N,       RSVD3,           PULL_UP,   TRISTATE,   INPUT),
-	DEFAULT_PINMUX(GMI_AD8,         PWM0,            NORMAL,    NORMAL,     OUTPUT), /* LCD1_BL_PWM */
-	DEFAULT_PINMUX(GMI_AD10,        NAND,            NORMAL,    NORMAL,     OUTPUT), /* LCD1_BL_EN */
+	DEFAULT_PINMUX(GMI_AD8,         PWM0,            NORMAL,    NORMAL,     OUTPUT),
+	DEFAULT_PINMUX(GMI_AD9,         NAND,            NORMAL,    NORMAL,     OUTPUT),
+	DEFAULT_PINMUX(GMI_AD10,        NAND,            NORMAL,    NORMAL,     OUTPUT),
 	DEFAULT_PINMUX(GMI_A16,         UARTD,           NORMAL,    NORMAL,     OUTPUT),
 	DEFAULT_PINMUX(GMI_A17,         UARTD,           NORMAL,    NORMAL,     INPUT),
 	DEFAULT_PINMUX(GMI_A18,         UARTD,           NORMAL,    NORMAL,     INPUT),
diff --git a/arch/arm/mach-tegra/include/mach/dc.h b/arch/arm/mach-tegra/include/mach/dc.h
index 65e70c7f0b90..7bb3ad3763c5 100644
--- a/arch/arm/mach-tegra/include/mach/dc.h
+++ b/arch/arm/mach-tegra/include/mach/dc.h
@@ -148,14 +148,32 @@ struct tegra_dsi_out {
 					 * support eot. Don't set it for
 					 * most panels. */
 
-	u32 		max_panel_freq_khz;
-	u32 		lp_cmd_mode_freq_khz;
+	u32		max_panel_freq_khz;
+	u32		lp_cmd_mode_freq_khz;
 	u32		hs_clk_in_lp_cmd_mode_freq_khz;
 	u32		burst_mode_freq_khz;
 
 	struct dsi_phy_timing_ns phy_timing;
 };
 
+enum {
+	TEGRA_DC_STEREO_MODE_2D,
+	TEGRA_DC_STEREO_MODE_3D
+};
+
+enum {
+	TEGRA_DC_STEREO_LANDSCAPE,
+	TEGRA_DC_STEREO_PORTRAIT
+};
+
+struct tegra_stereo_out {
+	int  mode_2d_3d;
+	int  orientation;
+
+	void (*set_mode)(int mode);
+	void (*set_orientation)(int orientation);
+};
+
 struct tegra_dc_mode {
 	int	pclk;
 	int	h_ref_to_sync;
@@ -182,8 +200,8 @@ enum {
 };
 
 struct tegra_dc_out_pin {
-	int     name;
-	int     pol;
+	int	name;
+	int	pol;
 };
 
 enum {
@@ -277,6 +295,7 @@ struct tegra_dc_out {
 	int				n_modes;
 
 	struct tegra_dsi_out		*dsi;
+	struct tegra_stereo_out		*stereo;
 
 	unsigned			height; /* mm */
 	unsigned			width; /* mm */
diff --git a/drivers/video/tegra/dc/dc_sysfs.c b/drivers/video/tegra/dc/dc_sysfs.c
index 4afc8642f173..fbe80c1d497a 100644
--- a/drivers/video/tegra/dc/dc_sysfs.c
+++ b/drivers/video/tegra/dc/dc_sysfs.c
@@ -83,6 +83,108 @@ static ssize_t enable_store(struct device *dev,
 
 static DEVICE_ATTR(enable, S_IRUGO|S_IWUSR|S_IWGRP, enable_show, enable_store);
 
+#define ORIENTATION_PORTRAIT	"portrait"
+#define ORIENTATION_LANDSCAPE	"landscape"
+
+static ssize_t orientation_3d_show(struct device *dev,
+	struct device_attribute *attr, char *buf)
+{
+	struct nvhost_device *ndev = to_nvhost_device(dev);
+	struct tegra_dc *dc = nvhost_get_drvdata(ndev);
+	struct tegra_dc_out *dc_out = dc->out;
+	const char *orientation;
+	switch (dc_out->stereo->orientation) {
+	case TEGRA_DC_STEREO_LANDSCAPE:
+		orientation = ORIENTATION_LANDSCAPE;
+		break;
+	case TEGRA_DC_STEREO_PORTRAIT:
+		orientation = ORIENTATION_PORTRAIT;
+		break;
+	default:
+		pr_err("Invalid value is stored for stereo_orientation.\n");
+		return -EINVAL;
+	}
+	return snprintf(buf, PAGE_SIZE, "%s\n", orientation);
+}
+
+static ssize_t orientation_3d_store(struct device *dev,
+	struct device_attribute *attr, const char *buf, size_t cnt)
+{
+	struct nvhost_device *ndev = to_nvhost_device(dev);
+	struct tegra_dc *dc = nvhost_get_drvdata(ndev);
+	struct tegra_dc_out *dc_out = dc->out;
+	struct tegra_stereo_out *stereo = dc_out->stereo;
+	int orientation;
+
+	if (0 == strncmp(buf, ORIENTATION_PORTRAIT,
+			min(cnt, ARRAY_SIZE(ORIENTATION_PORTRAIT) - 1))) {
+		orientation = TEGRA_DC_STEREO_PORTRAIT;
+	} else if (0 == strncmp(buf, ORIENTATION_LANDSCAPE,
+			min(cnt, ARRAY_SIZE(ORIENTATION_LANDSCAPE) - 1))) {
+		orientation = TEGRA_DC_STEREO_LANDSCAPE;
+	} else {
+		pr_err("Invalid property value for stereo_orientation.\n");
+		return -EINVAL;
+	}
+	stereo->orientation = orientation;
+	stereo->set_orientation(orientation);
+	return cnt;
+}
+
+static DEVICE_ATTR(stereo_orientation,
+	S_IRUGO|S_IWUGO, orientation_3d_show, orientation_3d_store);
+
+#define MODE_2D		"2d"
+#define MODE_3D		"3d"
+
+static ssize_t mode_3d_show(struct device *dev,
+	struct device_attribute *attr, char *buf)
+{
+	struct nvhost_device *ndev = to_nvhost_device(dev);
+	struct tegra_dc *dc = nvhost_get_drvdata(ndev);
+	struct tegra_dc_out *dc_out = dc->out;
+	const char *mode;
+	switch (dc_out->stereo->mode_2d_3d) {
+	case TEGRA_DC_STEREO_MODE_2D:
+		mode = MODE_2D;
+		break;
+	case TEGRA_DC_STEREO_MODE_3D:
+		mode = MODE_3D;
+		break;
+	default:
+		pr_err("Invalid value is stored for stereo_mode.\n");
+		return -EINVAL;
+	}
+	return snprintf(buf, PAGE_SIZE, "%s\n", mode);
+}
+
+static ssize_t mode_3d_store(struct device *dev,
+	struct device_attribute *attr, const char *buf, size_t cnt)
+{
+	struct nvhost_device *ndev = to_nvhost_device(dev);
+	struct tegra_dc *dc = nvhost_get_drvdata(ndev);
+	struct tegra_dc_out *dc_out = dc->out;
+	struct tegra_stereo_out *stereo = dc_out->stereo;
+	int mode;
+
+	if (0 == strncmp(buf, MODE_2D, min(cnt, ARRAY_SIZE(MODE_2D) - 1))) {
+		mode = TEGRA_DC_STEREO_MODE_2D;
+	} else if (0 == strncmp(buf, MODE_3D,
+			min(cnt, ARRAY_SIZE(MODE_3D) - 1))) {
+		mode = TEGRA_DC_STEREO_MODE_3D;
+	} else {
+		pr_err("Invalid property value for stereo_mode.\n");
+		return -EINVAL;
+	}
+	stereo->mode_2d_3d = mode;
+	stereo->set_mode(mode);
+	return cnt;
+}
+
+static DEVICE_ATTR(stereo_mode,
+	S_IRUGO|S_IWUGO, mode_3d_show, mode_3d_store);
+
+
 /********
  * Init *
  ********/
@@ -91,9 +193,12 @@ void __devexit tegra_dc_remove_sysfs(struct device *dev)
 	struct nvhost_device *ndev = to_nvhost_device(dev);
 	struct tegra_dc *dc = nvhost_get_drvdata(ndev);
 	struct tegra_dc_sd_settings *sd_settings = dc->out->sd_settings;
-
 	device_remove_file(dev, &dev_attr_mode);
 	device_remove_file(dev, &dev_attr_enable);
+	if (dc->out->stereo) {
+		device_remove_file(dev, &dev_attr_stereo_orientation);
+		device_remove_file(dev, &dev_attr_stereo_mode);
+	}
 
 	if(sd_settings) {
 		nvsd_remove_sysfs(dev);
@@ -109,6 +214,10 @@ void tegra_dc_create_sysfs(struct device *dev)
 
 	error |= device_create_file(dev, &dev_attr_mode);
 	error |= device_create_file(dev, &dev_attr_enable);
+	if (dc->out->stereo) {
+		error |= device_create_file(dev, &dev_attr_stereo_orientation);
+		error |= device_create_file(dev, &dev_attr_stereo_mode);
+	}
 
 	if(sd_settings) {
 		error |= nvsd_create_sysfs(dev);