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-rw-r--r--drivers/gpu/drm/panel/panel-jdi-lt070me05000.c523
1 files changed, 523 insertions, 0 deletions
diff --git a/drivers/gpu/drm/panel/panel-jdi-lt070me05000.c b/drivers/gpu/drm/panel/panel-jdi-lt070me05000.c
new file mode 100644
index 000000000..8f4f137a2
--- /dev/null
+++ b/drivers/gpu/drm/panel/panel-jdi-lt070me05000.c
@@ -0,0 +1,523 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2016 InforceComputing
+ * Author: Vinay Simha BN <simhavcs@gmail.com>
+ *
+ * Copyright (C) 2016 Linaro Ltd
+ * Author: Sumit Semwal <sumit.semwal@linaro.org>
+ *
+ * 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
+ */
+
+#include <linux/backlight.h>
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/regulator/consumer.h>
+
+#include <video/mipi_display.h>
+
+#include <drm/drm_crtc.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_modes.h>
+#include <drm/drm_panel.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;
+
+ backlight_disable(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;
+
+ backlight_enable(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,
+ .flags = 0,
+};
+
+static int jdi_panel_get_modes(struct drm_panel *panel,
+ struct drm_connector *connector)
+{
+ struct drm_display_mode *mode;
+ struct jdi_panel *jdi = to_jdi_panel(panel);
+ struct device *dev = &jdi->dsi->dev;
+
+ mode = drm_mode_duplicate(connector->dev, &default_mode);
+ if (!mode) {
+ dev_err(dev, "failed to add mode %ux%ux@%u\n",
+ default_mode.hdisplay, default_mode.vdisplay,
+ drm_mode_vrefresh(&default_mode));
+ return -ENOMEM;
+ }
+
+ drm_mode_set_name(mode);
+
+ drm_mode_probed_add(connector, mode);
+
+ connector->display_info.width_mm = 95;
+ 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->dsi->dev, &jdi_panel_funcs,
+ DRM_MODE_CONNECTOR_DSI);
+
+ drm_panel_add(&jdi->base);
+
+ return 0;
+}
+
+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;
+
+ ret = mipi_dsi_attach(dsi);
+ if (ret < 0) {
+ jdi_panel_del(jdi);
+ return ret;
+ }
+
+ return 0;
+}
+
+static void 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);
+
+ jdi_panel_del(jdi);
+}
+
+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 <sumit.semwal@linaro.org>");
+MODULE_AUTHOR("Vinay Simha BN <simhavcs@gmail.com>");
+MODULE_DESCRIPTION("JDI LT070ME05000 WUXGA");
+MODULE_LICENSE("GPL v2");