dt-bindings: Add Japan Display Inc vendor id

1/3

---
 Documentation/devicetree/bindings/vendor-prefixes.txt | 1 +
 1 file changed, 1 insertion(+)
index 0d9d4d8..48b8128 100644
@@ -139,6 +139,7 @@ invensense	InvenSense Inc.
 isee	ISEE 2007 S.L.
 isil	Intersil
 issi	Integrated Silicon Solutions Inc.
+jdi	Japan Display Inc.
 jedec	JEDEC Solid State Technology Association
 karo	Ka-Ro electronics GmbH
 keymile	Keymile GmbH

2.1.2
---
 .../bindings/display/panel/jdi,lt070me05000.txt    | 33 ++++++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/panel/jdi,lt070me05000.txt
new file mode 100644
index 0000000..4724952
@@ -0,0 +1,33 @@
+JDI model LT070ME05000 1200x1920 7" DSI Panel
+
+Required properties:
+- compatible: should be "jdi,lt070me05000"
+- vddp-supply: phandle of the regulator that provides the supply voltage
+  Power IC supply (3-5V)
+- iovcc-supply: phandle of the regulator that provides the supply voltage
+  IOVCC , power supply for LCM (1.8V)
+- enable-gpios: phandle of gpio for enable line
+  LED_EN, LED backlight enable, High active
+- reset-gpios: phandle of gpio for reset line
+  This should be 8mA, gpio can be configured using mux, pinctrl, pinctrl-names
+  XRES, Reset, Low active
+- dcdc-en-gpios: phandle of the gpio for power ic line
+  Power IC supply enable, High active
+
+Example:
+
+	dsi0: qcom,mdss_dsi@4700000 {
+		panel@0 {
+			compatible = "jdi,lt070me05000";
+			reg = <0>;
+			pinctrl-names = "default";
+			pinctrl-0 = <&dsi_panel_pinctrl>;
+
+			vddp-supply = <&pm8921_l17>;
+			iovcc-supply = <&pm8921_lvs7>;
+
+			enable-gpios = <&pm8921_gpio 36 GPIO_ACTIVE_HIGH>;
+			reset-gpios = <&tlmm_pinmux 54 GPIO_ACTIVE_LOW>;
+			dcdc-en-gpios = <&pm8921_gpio 23 GPIO_ACTIVE_HIGH>;
+		};
+	};

2.1.2

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---
 .../bindings/display/panel/jdi,lt070me05000.txt    | 33 ++++++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/panel/jdi,lt070me05000.txt
new file mode 100644
index 0000000..4724952
@@ -0,0 +1,33 @@
+JDI model LT070ME05000 1200x1920 7" DSI Panel
+
+Required properties:
+- compatible: should be "jdi,lt070me05000"
+- vddp-supply: phandle of the regulator that provides the supply voltage
+  Power IC supply (3-5V)
+- iovcc-supply: phandle of the regulator that provides the supply voltage
+  IOVCC , power supply for LCM (1.8V)
+- enable-gpios: phandle of gpio for enable line
+  LED_EN, LED backlight enable, High active
+- reset-gpios: phandle of gpio for reset line
+  This should be 8mA, gpio can be configured using mux, pinctrl, pinctrl-names
+  XRES, Reset, Low active
+- dcdc-en-gpios: phandle of the gpio for power ic line
+  Power IC supply enable, High active
+
+Example:
+
+       dsi0: qcom,mdss_dsi@4700000 {
+               panel@0 {
+                       compatible = "jdi,lt070me05000";
+                       reg = <0>;
+                       pinctrl-names = "default";
+                       pinctrl-0 = <&dsi_panel_pinctrl>;
+
+                       vddp-supply = <&pm8921_l17>;
+                       iovcc-supply = <&pm8921_lvs7>;
+
+                       enable-gpios = <&pm8921_gpio 36 GPIO_ACTIVE_HIGH>;
+                       reset-gpios = <&tlmm_pinmux 54 GPIO_ACTIVE_LOW>;
+                       dcdc-en-gpios = <&pm8921_gpio 23 GPIO_ACTIVE_HIGH>;
+               };
+       };
--

regards,
vinaysimha
    git://codeaurora.org/kernel/msm-3.10.git  LNX.LA.3.6_rb1.27
---
 drivers/gpu/drm/panel/Kconfig                  |  11 +
 drivers/gpu/drm/panel/Makefile                 |   1 +
 drivers/gpu/drm/panel/panel-jdi-lt070me05000.c | 532 +++++++++++++++++++++++++
 3 files changed, 544 insertions(+)
 create mode 100644 drivers/gpu/drm/panel/panel-jdi-lt070me05000.c
index 1500ab9..62aba97 100644
@@ -18,6 +18,17 @@ config DRM_PANEL_SIMPLE
 	  that it can be automatically turned off when the panel goes into a
 	  low power state.
 
+config DRM_PANEL_JDI_LT070ME05000
+	tristate "JDI LT070ME05000 WUXGA DSI panel"
+	depends on OF
+	depends on DRM_MIPI_DSI
+	depends on BACKLIGHT_CLASS_DEVICE
+	help
+	  Say Y here if you want to enable support for JDI DSI video mode
+	  panel as found in Google Nexus 7 (2013) devices.
+	  The panel has a 1200(RGB)×1920 (WUXGA) resolution and uses
+	  24 bit per pixel.
+
 config DRM_PANEL_SAMSUNG_LD9040
 	tristate "Samsung LD9040 RGB/SPI panel"
 	depends on OF && SPI

index f277eed..a5c7ec0 100644
@@ -1,4 +1,5 @@
 obj-$(CONFIG_DRM_PANEL_SIMPLE) += panel-simple.o
+obj-$(CONFIG_DRM_PANEL_JDI_LT070ME05000) += panel-jdi-lt070me05000.o
 obj-$(CONFIG_DRM_PANEL_LG_LG4573) += panel-lg-lg4573.o
 obj-$(CONFIG_DRM_PANEL_PANASONIC_VVX10F034N00) += panel-panasonic-vvx10f034n00.o
 obj-$(CONFIG_DRM_PANEL_SAMSUNG_LD9040) += panel-samsung-ld9040.o

2.1.2
    git://codeaurora.org/kernel/msm-3.10.git  LNX.LA.3.6_rb1.27
---
 drivers/gpu/drm/panel/Kconfig                  |  11 +
 drivers/gpu/drm/panel/Makefile                 |   1 +
 drivers/gpu/drm/panel/panel-jdi-lt070me05000.c | 532 +++++++++++++++++++++++++
 3 files changed, 544 insertions(+)
 create mode 100644 drivers/gpu/drm/panel/panel-jdi-lt070me05000.c
index 1500ab9..62aba97 100644
@@ -18,6 +18,17 @@ config DRM_PANEL_SIMPLE
          that it can be automatically turned off when the panel goes into a
          low power state.
 
+config DRM_PANEL_JDI_LT070ME05000
+       tristate "JDI LT070ME05000 WUXGA DSI panel"
+       depends on OF
+       depends on DRM_MIPI_DSI
+       depends on BACKLIGHT_CLASS_DEVICE
+       help
+         Say Y here if you want to enable support for JDI DSI video mode
+         panel as found in Google Nexus 7 (2013) devices.
+         The panel has a 1200(RGB)×1920 (WUXGA) resolution and uses
+         24 bit per pixel.
+
 config DRM_PANEL_SAMSUNG_LD9040
        tristate "Samsung LD9040 RGB/SPI panel"
        depends on OF && SPI

index f277eed..a5c7ec0 100644
@@ -1,4 +1,5 @@
 obj-$(CONFIG_DRM_PANEL_SIMPLE) += panel-simple.o
+obj-$(CONFIG_DRM_PANEL_JDI_LT070ME05000) += panel-jdi-lt070me05000.o
 obj-$(CONFIG_DRM_PANEL_LG_LG4573) += panel-lg-lg4573.o
 obj-$(CONFIG_DRM_PANEL_PANASONIC_VVX10F034N00) += panel-panasonic-vvx10f034n00.o
 obj-$(CONFIG_DRM_PANEL_SAMSUNG_LD9040) += panel-samsung-ld9040.o

new file mode 100644
index 0000000..5b2340e
@@ -0,0 +1,532 @@
+/*
+ * Copyright (C) 2016 InforceComputing
+ * Author: Vinay Simha BN <[email protected]>
+ *
+ * Copyright (C) 2016 Linaro Ltd
+ * Author: Sumit Semwal <[email protected]>
+ *
+ * From internet archives, the panel for Nexus 7 2nd Gen, 2013 model is a
+ * JDI model LT070ME05000, and its data sheet is at:
+ * http://panelone.net/en/7-0-inch/JDI_LT070ME05000_7.0_inch-datasheet
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <linux/backlight.h>
+#include <linux/gpio/consumer.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/regulator/consumer.h>
+
+#include <drm/drmP.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_panel.h>
+
+#include <video/mipi_display.h>
+
+static const char * const regulator_names[] = {
+       "vddp",
+       "iovcc"
+};
+
+struct jdi_panel {
+       struct drm_panel base;
+       struct mipi_dsi_device *dsi;
+
+       struct regulator_bulk_data supplies[ARRAY_SIZE(regulator_names)];
+
+       struct gpio_desc *enable_gpio;
+       struct gpio_desc *reset_gpio;
+       struct gpio_desc *dcdc_en_gpio;
+       struct backlight_device *backlight;
+
+       bool prepared;
+       bool enabled;
+
+       const struct drm_display_mode *mode;
+};
+
+static inline struct jdi_panel *to_jdi_panel(struct drm_panel *panel)
+{
+       return container_of(panel, struct jdi_panel, base);
+}
+
+static int jdi_panel_init(struct jdi_panel *jdi)
+{
+       struct mipi_dsi_device *dsi = jdi->dsi;
+       struct device *dev = &jdi->dsi->dev;
+       int ret;
+
+       dsi->mode_flags |= MIPI_DSI_MODE_LPM;
+
+       ret = mipi_dsi_dcs_soft_reset(dsi);
+       if (ret < 0)
+               return ret;
+
+       usleep_range(10000, 20000);
+
+       ret = mipi_dsi_dcs_set_pixel_format(dsi, MIPI_DCS_PIXEL_FMT_24BIT << 4);
+       if (ret < 0) {
+               dev_err(dev, "failed to set pixel format: %d\n", ret);
+               return ret;
+       }
+
+       ret = mipi_dsi_dcs_set_column_address(dsi, 0, jdi->mode->hdisplay - 1);
+       if (ret < 0) {
+               dev_err(dev, "failed to set column address: %d\n", ret);
+               return ret;
+       }
+
+       ret = mipi_dsi_dcs_set_page_address(dsi, 0, jdi->mode->vdisplay - 1);
+       if (ret < 0) {
+               dev_err(dev, "failed to set page address: %d\n", ret);
+               return ret;
+       }
+
+       /*
+        * BIT(5) BCTRL = 1 Backlight Control Block On, Brightness registers
+        *                  are active
+        * BIT(3) BL = 1    Backlight Control On
+        * BIT(2) DD = 0    Display Dimming is Off
+        */
+       ret = mipi_dsi_dcs_write(dsi, MIPI_DCS_WRITE_CONTROL_DISPLAY,
+                                (u8[]){ 0x24 }, 1);
+       if (ret < 0) {
+               dev_err(dev, "failed to write control display: %d\n", ret);
+               return ret;
+       }
+
+       /* CABC off */
+       ret = mipi_dsi_dcs_write(dsi, MIPI_DCS_WRITE_POWER_SAVE,
+                                (u8[]){ 0x00 }, 1);
+       if (ret < 0) {
+               dev_err(dev, "failed to set cabc off: %d\n", ret);
+               return ret;
+       }
+
+       ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
+       if (ret < 0) {
+               dev_err(dev, "failed to set exit sleep mode: %d\n", ret);
+               return ret;
+       }
+
+       msleep(120);
+
+       ret = mipi_dsi_generic_write(dsi, (u8[]){0xB0, 0x00}, 2);
+       if (ret < 0) {
+               dev_err(dev, "failed to set mcap: %d\n", ret);
+               return ret;
+       }
+
+       mdelay(10);
+
+       /* Interface setting, video mode */
+       ret = mipi_dsi_generic_write(dsi, (u8[])
+                                    {0xB3, 0x26, 0x08, 0x00, 0x20, 0x00}, 6);
+       if (ret < 0) {
+               dev_err(dev, "failed to set display interface setting: %d\n"
+                       , ret);
+               return ret;
+       }
+
+       mdelay(20);
+
+       ret = mipi_dsi_generic_write(dsi, (u8[]){0xB0, 0x03}, 2);
+       if (ret < 0) {
+               dev_err(dev, "failed to set default values for mcap: %d\n"
+                       , ret);
+               return ret;
+       }
+
+       return 0;
+}
+
+static int jdi_panel_on(struct jdi_panel *jdi)
+{
+       struct mipi_dsi_device *dsi = jdi->dsi;
+       struct device *dev = &jdi->dsi->dev;
+       int ret;
+
+       dsi->mode_flags |= MIPI_DSI_MODE_LPM;
+
+       ret = mipi_dsi_dcs_set_display_on(dsi);
+       if (ret < 0)
+               dev_err(dev, "failed to set display on: %d\n", ret);
+
+       return ret;
+}
+
+static void jdi_panel_off(struct jdi_panel *jdi)
+{
+       struct mipi_dsi_device *dsi = jdi->dsi;
+       struct device *dev = &jdi->dsi->dev;
+       int ret;
+
+       dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
+
+       ret = mipi_dsi_dcs_set_display_off(dsi);
+       if (ret < 0)
+               dev_err(dev, "failed to set display off: %d\n", ret);
+
+       ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
+       if (ret < 0)
+               dev_err(dev, "failed to enter sleep mode: %d\n", ret);
+
+       msleep(100);
+}
+
+static int jdi_panel_disable(struct drm_panel *panel)
+{
+       struct jdi_panel *jdi = to_jdi_panel(panel);
+
+       if (!jdi->enabled)
+               return 0;
+
+       jdi->backlight->props.power = FB_BLANK_POWERDOWN;
+       backlight_update_status(jdi->backlight);
+
+       jdi->enabled = false;
+
+       return 0;
+}
+
+static int jdi_panel_unprepare(struct drm_panel *panel)
+{
+       struct jdi_panel *jdi = to_jdi_panel(panel);
+       struct device *dev = &jdi->dsi->dev;
+       int ret;
+
+       if (!jdi->prepared)
+               return 0;
+
+       jdi_panel_off(jdi);
+
+       ret = regulator_bulk_disable(ARRAY_SIZE(jdi->supplies), jdi->supplies);
+       if (ret < 0)
+               dev_err(dev, "regulator disable failed, %d\n", ret);
+
+       gpiod_set_value(jdi->enable_gpio, 0);
+
+       gpiod_set_value(jdi->reset_gpio, 1);
+
+       gpiod_set_value(jdi->dcdc_en_gpio, 0);
+
+       jdi->prepared = false;
+
+       return 0;
+}
+
+static int jdi_panel_prepare(struct drm_panel *panel)
+{
+       struct jdi_panel *jdi = to_jdi_panel(panel);
+       struct device *dev = &jdi->dsi->dev;
+       int ret;
+
+       if (jdi->prepared)
+               return 0;
+
+       ret = regulator_bulk_enable(ARRAY_SIZE(jdi->supplies), jdi->supplies);
+       if (ret < 0) {
+               dev_err(dev, "regulator enable failed, %d\n", ret);
+               return ret;
+       }
+
+       msleep(20);
+
+       gpiod_set_value(jdi->dcdc_en_gpio, 1);
+       usleep_range(10, 20);
+
+       gpiod_set_value(jdi->reset_gpio, 0);
+       usleep_range(10, 20);
+
+       gpiod_set_value(jdi->enable_gpio, 1);
+       usleep_range(10, 20);
+
+       ret = jdi_panel_init(jdi);
+       if (ret < 0) {
+               dev_err(dev, "failed to init panel: %d\n", ret);
+               goto poweroff;
+       }
+
+       ret = jdi_panel_on(jdi);
+       if (ret < 0) {
+               dev_err(dev, "failed to set panel on: %d\n", ret);
+               goto poweroff;
+       }
+
+       jdi->prepared = true;
+
+       return 0;
+
+poweroff:
+       ret = regulator_bulk_disable(ARRAY_SIZE(jdi->supplies), jdi->supplies);
+       if (ret < 0)
+               dev_err(dev, "regulator disable failed, %d\n", ret);
+
+       gpiod_set_value(jdi->enable_gpio, 0);
+
+       gpiod_set_value(jdi->reset_gpio, 1);
+
+       gpiod_set_value(jdi->dcdc_en_gpio, 0);
+
+       return ret;
+}
+
+static int jdi_panel_enable(struct drm_panel *panel)
+{
+       struct jdi_panel *jdi = to_jdi_panel(panel);
+
+       if (jdi->enabled)
+               return 0;
+
+       jdi->backlight->props.power = FB_BLANK_UNBLANK;
+       backlight_update_status(jdi->backlight);
+
+       jdi->enabled = true;
+
+       return 0;
+}
+
+static const struct drm_display_mode default_mode = {
+               .clock = 155493,
+               .hdisplay = 1200,
+               .hsync_start = 1200 + 48,
+               .hsync_end = 1200 + 48 + 32,
+               .htotal = 1200 + 48 + 32 + 60,
+               .vdisplay = 1920,
+               .vsync_start = 1920 + 3,
+               .vsync_end = 1920 + 3 + 5,
+               .vtotal = 1920 + 3 + 5 + 6,
+               .vrefresh = 60,
+               .flags = 0,
+};
+
+static int jdi_panel_get_modes(struct drm_panel *panel)
+{
+       struct drm_display_mode *mode;
+       struct jdi_panel *jdi = to_jdi_panel(panel);
+       struct device *dev = &jdi->dsi->dev;
+
+       mode = drm_mode_duplicate(panel->drm, &default_mode);
+       if (!mode) {
+               dev_err(dev, "failed to add mode %ux%ux@%u\n",
+                       default_mode.hdisplay, default_mode.vdisplay,
+                       default_mode.vrefresh);
+               return -ENOMEM;
+       }
+
+       drm_mode_set_name(mode);
+
+       drm_mode_probed_add(panel->connector, mode);
+
+       panel->connector->display_info.width_mm = 95;
+       panel->connector->display_info.height_mm = 151;
+
+       return 1;
+}
+
+static int dsi_dcs_bl_get_brightness(struct backlight_device *bl)
+{
+       struct mipi_dsi_device *dsi = bl_get_data(bl);
+       int ret;
+       u16 brightness = bl->props.brightness;
+
+       dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
+
+       ret = mipi_dsi_dcs_get_display_brightness(dsi, &brightness);
+       if (ret < 0)
+               return ret;
+
+       dsi->mode_flags |= MIPI_DSI_MODE_LPM;
+
+       return brightness & 0xff;
+}
+
+static int dsi_dcs_bl_update_status(struct backlight_device *bl)
+{
+       struct mipi_dsi_device *dsi = bl_get_data(bl);
+       int ret;
+
+       dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
+
+       ret = mipi_dsi_dcs_set_display_brightness(dsi, bl->props.brightness);
+       if (ret < 0)
+               return ret;
+
+       dsi->mode_flags |= MIPI_DSI_MODE_LPM;
+
+       return 0;
+}
+
+static const struct backlight_ops dsi_bl_ops = {
+       .update_status = dsi_dcs_bl_update_status,
+       .get_brightness = dsi_dcs_bl_get_brightness,
+};
+
+static struct backlight_device *
+drm_panel_create_dsi_backlight(struct mipi_dsi_device *dsi)
+{
+       struct device *dev = &dsi->dev;
+       struct backlight_properties props;
+
+       memset(&props, 0, sizeof(props));
+       props.type = BACKLIGHT_RAW;
+       props.brightness = 255;
+       props.max_brightness = 255;
+
+       return devm_backlight_device_register(dev, dev_name(dev), dev, dsi,
+                                             &dsi_bl_ops, &props);
+}
+
+static const struct drm_panel_funcs jdi_panel_funcs = {
+       .disable = jdi_panel_disable,
+       .unprepare = jdi_panel_unprepare,
+       .prepare = jdi_panel_prepare,
+       .enable = jdi_panel_enable,
+       .get_modes = jdi_panel_get_modes,
+};
+
+static const struct of_device_id jdi_of_match[] = {
+       { .compatible = "jdi,lt070me05000", },
+       { }
+};
+MODULE_DEVICE_TABLE(of, jdi_of_match);
+
+static int jdi_panel_add(struct jdi_panel *jdi)
+{
+       struct device *dev = &jdi->dsi->dev;
+       int ret;
+       unsigned int i;
+
+       jdi->mode = &default_mode;
+
+       for (i = 0; i < ARRAY_SIZE(jdi->supplies); i++)
+               jdi->supplies[i].supply = regulator_names[i];
+
+       ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(jdi->supplies),
+                                     jdi->supplies);
+       if (ret < 0) {
+               dev_err(dev, "failed to init regulator, ret=%d\n", ret);
+               return ret;
+       }
+
+       jdi->enable_gpio = devm_gpiod_get(dev, "enable", GPIOD_OUT_LOW);
+       if (IS_ERR(jdi->enable_gpio)) {
+               ret = PTR_ERR(jdi->enable_gpio);
+               dev_err(dev, "cannot get enable-gpio %d\n", ret);
+               return ret;
+       }
+
+       jdi->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
+       if (IS_ERR(jdi->reset_gpio)) {
+               ret = PTR_ERR(jdi->reset_gpio);
+               dev_err(dev, "cannot get reset-gpios %d\n", ret);
+               return ret;
+       }
+
+       jdi->dcdc_en_gpio = devm_gpiod_get(dev, "dcdc-en", GPIOD_OUT_LOW);
+       if (IS_ERR(jdi->dcdc_en_gpio)) {
+               ret = PTR_ERR(jdi->dcdc_en_gpio);
+               dev_err(dev, "cannot get dcdc-en-gpio %d\n", ret);
+               return ret;
+       }
+
+       jdi->backlight = drm_panel_create_dsi_backlight(jdi->dsi);
+       if (IS_ERR(jdi->backlight)) {
+               ret = PTR_ERR(jdi->backlight);
+               dev_err(dev, "failed to register backlight %d\n", ret);
+               return ret;
+       }
+
+       drm_panel_init(&jdi->base);
+       jdi->base.funcs = &jdi_panel_funcs;
+       jdi->base.dev = &jdi->dsi->dev;
+
+       ret = drm_panel_add(&jdi->base);
+
+       return ret;
+}
+
+static void jdi_panel_del(struct jdi_panel *jdi)
+{
+       if (jdi->base.dev)
+               drm_panel_remove(&jdi->base);
+}
+
+static int jdi_panel_probe(struct mipi_dsi_device *dsi)
+{
+       struct jdi_panel *jdi;
+       int ret;
+
+       dsi->lanes = 4;
+       dsi->format = MIPI_DSI_FMT_RGB888;
+       dsi->mode_flags =  MIPI_DSI_MODE_VIDEO_HSE | MIPI_DSI_MODE_VIDEO |
+                          MIPI_DSI_CLOCK_NON_CONTINUOUS;
+
+       jdi = devm_kzalloc(&dsi->dev, sizeof(*jdi), GFP_KERNEL);
+       if (!jdi)
+               return -ENOMEM;
+
+       mipi_dsi_set_drvdata(dsi, jdi);
+
+       jdi->dsi = dsi;
+
+       ret = jdi_panel_add(jdi);
+       if (ret < 0)
+               return ret;
+
+       return mipi_dsi_attach(dsi);
+}
+
+static int jdi_panel_remove(struct mipi_dsi_device *dsi)
+{
+       struct jdi_panel *jdi = mipi_dsi_get_drvdata(dsi);
+       int ret;
+
+       ret = jdi_panel_disable(&jdi->base);
+       if (ret < 0)
+               dev_err(&dsi->dev, "failed to disable panel: %d\n", ret);
+
+       ret = mipi_dsi_detach(dsi);
+       if (ret < 0)
+               dev_err(&dsi->dev, "failed to detach from DSI host: %d\n",
+                       ret);
+
+       drm_panel_detach(&jdi->base);
+       jdi_panel_del(jdi);
+
+       return 0;
+}
+
+static void jdi_panel_shutdown(struct mipi_dsi_device *dsi)
+{
+       struct jdi_panel *jdi = mipi_dsi_get_drvdata(dsi);
+
+       jdi_panel_disable(&jdi->base);
+}
+
+static struct mipi_dsi_driver jdi_panel_driver = {
+       .driver = {
+               .name = "panel-jdi-lt070me05000",
+               .of_match_table = jdi_of_match,
+       },
+       .probe = jdi_panel_probe,
+       .remove = jdi_panel_remove,
+       .shutdown = jdi_panel_shutdown,
+};
+module_mipi_dsi_driver(jdi_panel_driver);
+
+MODULE_AUTHOR("Sumit Semwal <[email protected]>");
+MODULE_AUTHOR("Vinay Simha BN <[email protected]>");
+MODULE_DESCRIPTION("JDI LT070ME05000 WUXGA");
+MODULE_LICENSE("GPL v2");
--

regards,
vinaysimha
    git://codeaurora.org/kernel/msm-3.10.git  LNX.LA.3.6_rb1.27
---
 drivers/gpu/drm/panel/Kconfig                  |  11 +
 drivers/gpu/drm/panel/Makefile                 |   1 +
 drivers/gpu/drm/panel/panel-jdi-lt070me05000.c | 532
+++++++++++++++++++++++++
 3 files changed, 544 insertions(+)
 create mode 100644 drivers/gpu/drm/panel/panel-jdi-lt070me05000.c
index 1500ab9..62aba97 100644
@@ -18,6 +18,17 @@ config DRM_PANEL_SIMPLE
          that it can be automatically turned off when the panel goes into

+config DRM_PANEL_JDI_LT070ME05000
+       tristate "JDI LT070ME05000 WUXGA DSI panel"
+       depends on OF
+       depends on DRM_MIPI_DSI
+       depends on BACKLIGHT_CLASS_DEVICE
+       help
+         Say Y here if you want to enable support for JDI DSI video mode
+         panel as found in Google Nexus 7 (2013) devices.
+         The panel has a 1200(RGB)×1920 (WUXGA) resolution and uses
+         24 bit per pixel.
+
 config DRM_PANEL_SAMSUNG_LD9040
        tristate "Samsung LD9040 RGB/SPI panel"
        depends on OF && SPI

@@ -1,4 +1,5 @@
 obj-$(CONFIG_DRM_PANEL_SIMPLE) += panel-simple.o
+obj-$(CONFIG_DRM_PANEL_JDI_LT070ME05000) += panel-jdi-lt070me05000.o
 obj-$(CONFIG_DRM_PANEL_LG_LG4573) += panel-lg-lg4573.o
 obj-$(CONFIG_DRM_PANEL_PANASONIC_VVX10F034N00) +=

new file mode 100644
index 0000000..5b2340e
@@ -0,0 +1,532 @@
+/*
+ * Copyright (C) 2016 InforceComputing
+ * Author: Vinay Simha BN <[email protected]>
+ *
+ * Copyright (C) 2016 Linaro Ltd
+ * Author: Sumit Semwal <[email protected]>
+ *
+ * From internet archives, the panel for Nexus 7 2nd Gen, 2013 model is a
+ * JDI model LT070ME05000, and its data sheet is at:
+ * http://panelone.net/en/7-0-inch/JDI_LT070ME05000_7.0_inch-datasheet
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as

+#include <linux/backlight.h>
+#include <linux/gpio/consumer.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/regulator/consumer.h>
+
+#include <drm/drmP.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_panel.h>
+
+#include <video/mipi_display.h>
+
+static const char * const regulator_names[] = {
+       "vddp",
+       "iovcc"
+};
+
+struct jdi_panel {
+       struct drm_panel base;
+       struct mipi_dsi_device *dsi;
+
+       struct regulator_bulk_data supplies[ARRAY_SIZE(regulator_names)];
+
+       struct gpio_desc *enable_gpio;
+       struct gpio_desc *reset_gpio;
+       struct gpio_desc *dcdc_en_gpio;
+       struct backlight_device *backlight;
+
+       bool prepared;
+       bool enabled;
+
+       const struct drm_display_mode *mode;
+};
+
+static inline struct jdi_panel *to_jdi_panel(struct drm_panel *panel)
+{
+       return container_of(panel, struct jdi_panel, base);
+}
+
+static int jdi_panel_init(struct jdi_panel *jdi)
+{
+       struct mipi_dsi_device *dsi = jdi->dsi;
+       struct device *dev = &jdi->dsi->dev;
+       int ret;
+
+       dsi->mode_flags |= MIPI_DSI_MODE_LPM;
+
+       ret = mipi_dsi_dcs_soft_reset(dsi);
+       if (ret < 0)
+               return ret;
+
+       usleep_range(10000, 20000);
+
+       ret = mipi_dsi_dcs_set_pixel_format(dsi, MIPI_DCS_PIXEL_FMT_24BIT

+       if (ret < 0) {
+               dev_err(dev, "failed to set pixel format: %d\n", ret);
+               return ret;
+       }
+
+       ret = mipi_dsi_dcs_set_column_address(dsi, 0, jdi->mode->hdisplay
- 1);
+       if (ret < 0) {
+               dev_err(dev, "failed to set column address: %d\n", ret);
+               return ret;
+       }
+
+       ret = mipi_dsi_dcs_set_page_address(dsi, 0, jdi->mode->vdisplay -

+       if (ret < 0) {
+               dev_err(dev, "failed to set page address: %d\n", ret);
+               return ret;
+       }
+
+       /*
+        * BIT(5) BCTRL = 1 Backlight Control Block On, Brightness

+        *                  are active
+        * BIT(3) BL = 1    Backlight Control On
+        * BIT(2) DD = 0    Display Dimming is Off
+        */
+       ret = mipi_dsi_dcs_write(dsi, MIPI_DCS_WRITE_CONTROL_DISPLAY,
+                                (u8[]){ 0x24 }, 1);
+       if (ret < 0) {
+               dev_err(dev, "failed to write control display: %d\n", ret);
+               return ret;
+       }
+
+       /* CABC off */
+       ret = mipi_dsi_dcs_write(dsi, MIPI_DCS_WRITE_POWER_SAVE,
+                                (u8[]){ 0x00 }, 1);
+       if (ret < 0) {
+               dev_err(dev, "failed to set cabc off: %d\n", ret);
+               return ret;
+       }
+
+       ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
+       if (ret < 0) {
+               dev_err(dev, "failed to set exit sleep mode: %d\n", ret);
+               return ret;
+       }
+
+       msleep(120);
+
+       ret = mipi_dsi_generic_write(dsi, (u8[]){0xB0, 0x00}, 2);
+       if (ret < 0) {
+               dev_err(dev, "failed to set mcap: %d\n", ret);
+               return ret;
+       }
+
+       mdelay(10);
+
+       /* Interface setting, video mode */
+       ret = mipi_dsi_generic_write(dsi, (u8[])
+                                    {0xB3, 0x26, 0x08, 0x00, 0x20, 0x00},

+       if (ret < 0) {
+               dev_err(dev, "failed to set display interface setting:

+                       , ret);
+               return ret;
+       }
+
+       mdelay(20);
+
+       ret = mipi_dsi_generic_write(dsi, (u8[]){0xB0, 0x03}, 2);
+       if (ret < 0) {
+               dev_err(dev, "failed to set default values for mcap: %d\n"
+                       , ret);
+               return ret;
+       }
+
+       return 0;
+}
+
+static int jdi_panel_on(struct jdi_panel *jdi)
+{
+       struct mipi_dsi_device *dsi = jdi->dsi;
+       struct device *dev = &jdi->dsi->dev;
+       int ret;
+
+       dsi->mode_flags |= MIPI_DSI_MODE_LPM;
+
+       ret = mipi_dsi_dcs_set_display_on(dsi);
+       if (ret < 0)
+               dev_err(dev, "failed to set display on: %d\n", ret);
+
+       return ret;
+}
+
+static void jdi_panel_off(struct jdi_panel *jdi)
+{
+       struct mipi_dsi_device *dsi = jdi->dsi;
+       struct device *dev = &jdi->dsi->dev;
+       int ret;
+
+       dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
+
+       ret = mipi_dsi_dcs_set_display_off(dsi);
+       if (ret < 0)
+               dev_err(dev, "failed to set display off: %d\n", ret);
+
+       ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
+       if (ret < 0)
+               dev_err(dev, "failed to enter sleep mode: %d\n", ret);
+
+       msleep(100);
+}
+
+static int jdi_panel_disable(struct drm_panel *panel)
+{
+       struct jdi_panel *jdi = to_jdi_panel(panel);
+
+       if (!jdi->enabled)
+               return 0;
+
+       jdi->backlight->props.power = FB_BLANK_POWERDOWN;
+       backlight_update_status(jdi->backlight);
+
+       jdi->enabled = false;
+
+       return 0;
+}
+
+static int jdi_panel_unprepare(struct drm_panel *panel)
+{
+       struct jdi_panel *jdi = to_jdi_panel(panel);
+       struct device *dev = &jdi->dsi->dev;
+       int ret;
+
+       if (!jdi->prepared)
+               return 0;
+
+       jdi_panel_off(jdi);
+
+       ret = regulator_bulk_disable(ARRAY_SIZE(jdi->supplies),

+       if (ret < 0)
+               dev_err(dev, "regulator disable failed, %d\n", ret);
+
+       gpiod_set_value(jdi->enable_gpio, 0);
+
+       gpiod_set_value(jdi->reset_gpio, 1);
+
+       gpiod_set_value(jdi->dcdc_en_gpio, 0);
+
+       jdi->prepared = false;
+
+       return 0;
+}
+
+static int jdi_panel_prepare(struct drm_panel *panel)
+{
+       struct jdi_panel *jdi = to_jdi_panel(panel);
+       struct device *dev = &jdi->dsi->dev;
+       int ret;
+
+       if (jdi->prepared)
+               return 0;
+
+       ret = regulator_bulk_enable(ARRAY_SIZE(jdi->supplies),

+       if (ret < 0) {
+               dev_err(dev, "regulator enable failed, %d\n", ret);
+               return ret;
+       }
+
+       msleep(20);
+
+       gpiod_set_value(jdi->dcdc_en_gpio, 1);
+       usleep_range(10, 20);
+
+       gpiod_set_value(jdi->reset_gpio, 0);
+       usleep_range(10, 20);
+
+       gpiod_set_value(jdi->enable_gpio, 1);
+       usleep_range(10, 20);
+
+       ret = jdi_panel_init(jdi);
+       if (ret < 0) {
+               dev_err(dev, "failed to init panel: %d\n", ret);
+               goto poweroff;
+       }
+
+       ret = jdi_panel_on(jdi);
+       if (ret < 0) {
+               dev_err(dev, "failed to set panel on: %d\n", ret);
+               goto poweroff;
+       }
+
+       jdi->prepared = true;
+
+       return 0;
+
+poweroff:
+       ret = regulator_bulk_disable(ARRAY_SIZE(jdi->supplies),

+       if (ret < 0)
+               dev_err(dev, "regulator disable failed, %d\n", ret);
+
+       gpiod_set_value(jdi->enable_gpio, 0);
+
+       gpiod_set_value(jdi->reset_gpio, 1);
+
+       gpiod_set_value(jdi->dcdc_en_gpio, 0);
+
+       return ret;
+}
+
+static int jdi_panel_enable(struct drm_panel *panel)
+{
+       struct jdi_panel *jdi = to_jdi_panel(panel);
+
+       if (jdi->enabled)
+               return 0;
+
+       jdi->backlight->props.power = FB_BLANK_UNBLANK;
+       backlight_update_status(jdi->backlight);
+
+       jdi->enabled = true;
+
+       return 0;
+}
+
+static const struct drm_display_mode default_mode = {
+               .clock = 155493,
+               .hdisplay = 1200,
+               .hsync_start = 1200 + 48,
+               .hsync_end = 1200 + 48 + 32,
+               .htotal = 1200 + 48 + 32 + 60,
+               .vdisplay = 1920,
+               .vsync_start = 1920 + 3,
+               .vsync_end = 1920 + 3 + 5,
+               .vtotal = 1920 + 3 + 5 + 6,
+               .vrefresh = 60,
+               .flags = 0,
+};
+
+static int jdi_panel_get_modes(struct drm_panel *panel)
+{
+       struct drm_display_mode *mode;
+       struct jdi_panel *jdi = to_jdi_panel(panel);
+       struct device *dev = &jdi->dsi->dev;
+
+       mode = drm_mode_duplicate(panel->drm, &default_mode);
+       if (!mode) {
+               dev_err(dev, "failed to add mode %ux%ux@%u\n",
+                       default_mode.hdisplay, default_mode.vdisplay,
+                       default_mode.vrefresh);
+               return -ENOMEM;
+       }
+
+       drm_mode_set_name(mode);
+
+       drm_mode_probed_add(panel->connector, mode);
+
+       panel->connector->display_info.width_mm = 95;
+       panel->connector->display_info.height_mm = 151;
+
+       return 1;
+}
+
+static int dsi_dcs_bl_get_brightness(struct backlight_device *bl)
+{
+       struct mipi_dsi_device *dsi = bl_get_data(bl);
+       int ret;
+       u16 brightness = bl->props.brightness;
+
+       dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
+
+       ret = mipi_dsi_dcs_get_display_brightness(dsi, &brightness);
+       if (ret < 0)
+               return ret;
+
+       dsi->mode_flags |= MIPI_DSI_MODE_LPM;
+
+       return brightness & 0xff;
+}
+
+static int dsi_dcs_bl_update_status(struct backlight_device *bl)
+{
+       struct mipi_dsi_device *dsi = bl_get_data(bl);
+       int ret;
+
+       dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
+
+       ret = mipi_dsi_dcs_set_display_brightness(dsi,

+       if (ret < 0)
+               return ret;
+
+       dsi->mode_flags |= MIPI_DSI_MODE_LPM;
+
+       return 0;
+}
+
+static const struct backlight_ops dsi_bl_ops = {
+       .update_status = dsi_dcs_bl_update_status,
+       .get_brightness = dsi_dcs_bl_get_brightness,
+};
+
+static struct backlight_device *
+drm_panel_create_dsi_backlight(struct mipi_dsi_device *dsi)
+{
+       struct device *dev = &dsi->dev;
+       struct backlight_properties props;
+
+       memset(&props, 0, sizeof(props));
+       props.type = BACKLIGHT_RAW;
+       props.brightness = 255;
+       props.max_brightness = 255;
+
+       return devm_backlight_device_register(dev, dev_name(dev), dev,

+                                             &dsi_bl_ops, &props);
+}
+
+static const struct drm_panel_funcs jdi_panel_funcs = {
+       .disable = jdi_panel_disable,
+       .unprepare = jdi_panel_unprepare,
+       .prepare = jdi_panel_prepare,
+       .enable = jdi_panel_enable,
+       .get_modes = jdi_panel_get_modes,
+};
+
+static const struct of_device_id jdi_of_match[] = {
+       { .compatible = "jdi,lt070me05000", },
+       { }
+};
+MODULE_DEVICE_TABLE(of, jdi_of_match);
+
+static int jdi_panel_add(struct jdi_panel *jdi)
+{
+       struct device *dev = &jdi->dsi->dev;
+       int ret;
+       unsigned int i;
+
+       jdi->mode = &default_mode;
+
+       for (i = 0; i < ARRAY_SIZE(jdi->supplies); i++)
+               jdi->supplies[i].supply = regulator_names[i];
+
+       ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(jdi->supplies),
+                                     jdi->supplies);
+       if (ret < 0) {
+               dev_err(dev, "failed to init regulator, ret=%d\n", ret);
+               return ret;
+       }
+
+       jdi->enable_gpio = devm_gpiod_get(dev, "enable", GPIOD_OUT_LOW);
+       if (IS_ERR(jdi->enable_gpio)) {
+               ret = PTR_ERR(jdi->enable_gpio);
+               dev_err(dev, "cannot get enable-gpio %d\n", ret);
+               return ret;
+       }
+
+       jdi->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
+       if (IS_ERR(jdi->reset_gpio)) {
+               ret = PTR_ERR(jdi->reset_gpio);
+               dev_err(dev, "cannot get reset-gpios %d\n", ret);
+               return ret;
+       }
+
+       jdi->dcdc_en_gpio = devm_gpiod_get(dev, "dcdc-en", GPIOD_OUT_LOW);
+       if (IS_ERR(jdi->dcdc_en_gpio)) {
+               ret = PTR_ERR(jdi->dcdc_en_gpio);
+               dev_err(dev, "cannot get dcdc-en-gpio %d\n", ret);
+               return ret;
+       }
+
+       jdi->backlight = drm_panel_create_dsi_backlight(jdi->dsi);
+       if (IS_ERR(jdi->backlight)) {
+               ret = PTR_ERR(jdi->backlight);
+               dev_err(dev, "failed to register backlight %d\n", ret);
+               return ret;
+       }
+
+       drm_panel_init(&jdi->base);
+       jdi->base.funcs = &jdi_panel_funcs;
+       jdi->base.dev = &jdi->dsi->dev;
+
+       ret = drm_panel_add(&jdi->base);
+
+       return ret;
+}
+
+static void jdi_panel_del(struct jdi_panel *jdi)
+{
+       if (jdi->base.dev)
+               drm_panel_remove(&jdi->base);
+}
+
+static int jdi_panel_probe(struct mipi_dsi_device *dsi)
+{
+       struct jdi_panel *jdi;
+       int ret;
+
+       dsi->lanes = 4;
+       dsi->format = MIPI_DSI_FMT_RGB888;
+       dsi->mode_flags =  MIPI_DSI_MODE_VIDEO_HSE | MIPI_DSI_MODE_VIDEO |
+                          MIPI_DSI_CLOCK_NON_CONTINUOUS;
+
+       jdi = devm_kzalloc(&dsi->dev, sizeof(*jdi), GFP_KERNEL);
+       if (!jdi)
+               return -ENOMEM;
+
+       mipi_dsi_set_drvdata(dsi, jdi);
+
+       jdi->dsi = dsi;
+
+       ret = jdi_panel_add(jdi);
+       if (ret < 0)
+               return ret;
+
+       return mipi_dsi_attach(dsi);
+}
+
+static int jdi_panel_remove(struct mipi_dsi_device *dsi)
+{
+       struct jdi_panel *jdi = mipi_dsi_get_drvdata(dsi);
+       int ret;
+
+       ret = jdi_panel_disable(&jdi->base);
+       if (ret < 0)
+               dev_err(&dsi->dev, "failed to disable panel: %d\n", ret);
+
+       ret = mipi_dsi_detach(dsi);
+       if (ret < 0)
+               dev_err(&dsi->dev, "failed to detach from DSI host: %d\n",
+                       ret);
+
+       drm_panel_detach(&jdi->base);
+       jdi_panel_del(jdi);
+
+       return 0;
+}
+
+static void jdi_panel_shutdown(struct mipi_dsi_device *dsi)
+{
+       struct jdi_panel *jdi = mipi_dsi_get_drvdata(dsi);
+
+       jdi_panel_disable(&jdi->base);
+}
+
+static struct mipi_dsi_driver jdi_panel_driver = {
+       .driver = {
+               .name = "panel-jdi-lt070me05000",
+               .of_match_table = jdi_of_match,
+       },
+       .probe = jdi_panel_probe,
+       .remove = jdi_panel_remove,
+       .shutdown = jdi_panel_shutdown,
+};
+module_mipi_dsi_driver(jdi_panel_driver);
+
+MODULE_AUTHOR("Sumit Semwal <[email protected]>");
+MODULE_AUTHOR("Vinay Simha BN <[email protected]>");
+MODULE_DESCRIPTION("JDI LT070ME05000 WUXGA");
+MODULE_LICENSE("GPL v2");
--

regards,
vinaysimha
    git://codeaurora.org/kernel/msm-3.10.git  LNX.LA.3.6_rb1.27
---
 drivers/gpu/drm/panel/Kconfig                  |  11 +
 drivers/gpu/drm/panel/Makefile                 |   1 +
 drivers/gpu/drm/panel/panel-jdi-lt070me05000.c | 532 +++++++++++++++++++++++++
 3 files changed, 544 insertions(+)
 create mode 100644 drivers/gpu/drm/panel/panel-jdi-lt070me05000.c
---
 Documentation/devicetree/bindings/vendor-prefixes.txt | 1 +
 1 file changed, 1 insertion(+)

dt-bindings: Add Japan Display Inc vendor id

Vinay Simha BN

Vinay Simha BN

Vinay Simha

Vinay Simha BN

Vinay Simha

Vinay Simha

Thierry Reding

Rob Herring