Add support for the JDI lt070me05000 WUXGA DSI panel used in
Nexus 7 2013 devices.
Programming sequence for the panel is was originally found in the
android-msm-flo-3.4-lollipop-release branch from:
https://android.googlesource.com/kernel/msm.git
And video mode setting is from dsi-panel-jdi-dualmipi1-video.dtsi
file in:
git://codeaurora.org/kernel/msm-3.10.git LNX.LA.3.6_rb1.27
Cc: Archit Taneja <archit.taneja@xxxxxxxxx>
[sumit.semwal: Ported to the drm/panel framework]
Signed-off-by: Sumit Semwal <sumit.semwal@xxxxxxxxxx>
[jstultz: Cherry-picked to mainline, folded down other fixes
from Vinay and Archit]
Signed-off-by: John Stultz <john.stultz@xxxxxxxxxx>
[vinay simha bn: removed interface setting cmd mode, video
mode panel setting selection]
Cc: Rob Clark <robdclark@xxxxxxxxx>
Signed-off-by: Vinay Simha BN <simhavcs@xxxxxxxxx>
--
v2:
* incorporated code reviews from theiry, archit
code style, alphabetical soring in Makefile, Kconfig, regulator_bulk,
arrays of u8, generic helper function, documentation bindings,
v3:
* dcs backlight support added
* tested this panel driver in nexus7 2013 device
v4:
* backlight interface added in the panel driver
* incorporated width_mm and height_mm suggested by rob herring
---
drivers/gpu/drm/panel/Kconfig | 11 +
drivers/gpu/drm/panel/Makefile | 1 +
drivers/gpu/drm/panel/panel-jdi-lt070me05000.c | 539 +++++++++++++++++++++++++
3 files changed, 551 insertions(+)
create mode 100644 drivers/gpu/drm/panel/panel-jdi-lt070me05000.c
diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
index 1500ab9..83e89e7 100644
--- a/drivers/gpu/drm/panel/Kconfig
+++ b/drivers/gpu/drm/panel/Kconfig
@@ -7,6 +7,17 @@ config DRM_PANEL
menu "Display Panels"
depends on DRM && DRM_PANEL
+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 WUXGA 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 RGB per pixel.
+
config DRM_PANEL_SIMPLE
tristate "support for simple panels"
depends on OF
diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile
index f277eed..5d74ac2 100644
--- a/drivers/gpu/drm/panel/Makefile
+++ b/drivers/gpu/drm/panel/Makefile
@@ -1,3 +1,4 @@
+obj-$(CONFIG_DRM_PANEL_JDI_LT070ME05000) += panel-jdi-lt070me05000.o
obj-$(CONFIG_DRM_PANEL_SIMPLE) += panel-simple.o
obj-$(CONFIG_DRM_PANEL_LG_LG4573) += panel-lg-lg4573.o
obj-$(CONFIG_DRM_PANEL_PANASONIC_VVX10F034N00) += panel-panasonic-vvx10f034n00.o
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 0000000..8657e5f
--- /dev/null
+++ b/drivers/gpu/drm/panel/panel-jdi-lt070me05000.c
@@ -0,0 +1,539 @@
+/*
+ * Copyright (C) 2016 InforceComputing
+ * Author: Vinay Simha BN <simhavcs@xxxxxxxxx>
+ *
+ * Copyright (C) 2016 Linaro Ltd
+ * Author: Sumit Semwal <sumit.semwal@xxxxxxxxxx>
+ *
+ * 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>
+
+#define PANEL_DEV_REGULATOR_MAX 3
+#define PANEL_MAX_BRIGHTNESS 0xFF
+
+const char *regs[] = {
+ "vddp",
+ "dcdc_en",
+ "vcc"
+};
+
+struct jdi_panel {
+ struct drm_panel base;
+ struct mipi_dsi_device *dsi;
+
+ struct regulator_bulk_data supplies[PANEL_DEV_REGULATOR_MAX];
+
+ struct gpio_desc *reset_gpio;
+ struct gpio_desc *enable_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;
+ 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, 0x70);
+ if (ret < 0)
+ return ret;
+
+ ret = mipi_dsi_dcs_set_column_address(dsi, 0x0000, 0x04AF);
+ if (ret < 0)
+ return ret;
+
+ ret = mipi_dsi_dcs_set_page_address(dsi, 0x0000, 0x077F);
+ if (ret < 0)
+ return ret;
+
+ ret = mipi_dsi_dcs_set_tear_on(dsi,
+ MIPI_DSI_DCS_TEAR_MODE_VBLANK);
+ if (ret < 0)
+ return ret;
+ usleep_range(5000, 10000);
+
+ ret = mipi_dsi_set_tear_scanline(dsi, 0x0300);
+ if (ret < 0)
+ return ret;
+
+ ret = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_DISPLAY_BRIGHTNESS,
+ (u8[]){ 0xFF }, 1);
+ if (ret < 0)
+ return ret;
+
+ ret = mipi_dsi_dcs_write(dsi, MIPI_DCS_WRITE_CONTROL_DISPLAY,
+ (u8[]){ 0x24 }, 1);
+ if (ret < 0)
+ return ret;
+
+ ret = mipi_dsi_dcs_write(dsi, MIPI_DCS_WRITE_POWER_SAVE,
+ (u8[]){ 0x00 }, 1);
+ if (ret < 0)
+ return ret;
+
+ ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
+ if (ret < 0)
+ return ret;
+ mdelay(120);
+
+ ret = mipi_dsi_generic_write(dsi, (u8[]){0xB0, 0x00}, 2);
+ if (ret < 0)
+ return ret;
+ mdelay(10);
+
+ ret = mipi_dsi_generic_write(dsi, (u8[])
+ {0xB3, 0x26, 0x08, 0x00, 0x20, 0x00}, 6);
+ if (ret < 0)
+ return ret;
+ mdelay(20);
+
+ ret = mipi_dsi_generic_write(dsi, (u8[]){0xB0, 0x03}, 2);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static int jdi_panel_on(struct jdi_panel *jdi)
+{
+ struct mipi_dsi_device *dsi = jdi->dsi;
+ int ret;
+
+ dsi->mode_flags |= MIPI_DSI_MODE_LPM;
+
+ ret = mipi_dsi_dcs_set_display_on(dsi);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static int jdi_panel_off(struct jdi_panel *jdi)
+{
+ struct mipi_dsi_device *dsi = jdi->dsi;
+ int ret;
+
+ dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
+
+ ret = mipi_dsi_dcs_set_display_off(dsi);
+ if (ret < 0)
+ return ret;
+
+ ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
+ if (ret < 0)
+ return ret;
+
+ ret = mipi_dsi_dcs_set_tear_off(dsi);
+ if (ret < 0)
+ return ret;
+
+ msleep(100);
+
+ return 0;
+}
+
+static int jdi_panel_disable(struct drm_panel *panel)
+{
+ struct jdi_panel *jdi = to_jdi_panel(panel);
+
+ if (!jdi->enabled)
+ return 0;
+
+ DRM_DEBUG("disable\n");
+
+ if (jdi->backlight) {
+ 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 regulator_bulk_data *s = jdi->supplies;
+ int num = PANEL_DEV_REGULATOR_MAX;
+ struct device *dev = &jdi->dsi->dev;
+ int ret;
+
+ if (!jdi->prepared)
+ return 0;
+
+ DRM_DEBUG("unprepare\n");
+
+ ret = jdi_panel_off(jdi);
+ if (ret) {
+ dev_err(panel->dev, "failed to set panel off: %d\n", ret);
+ return ret;
+ }
+
+ ret = regulator_bulk_disable(num, s);
+ if (ret < 0) {
+ dev_err(dev, "regulator disable failed, %d\n", ret);
+ return ret;
+ }
+
+ if (jdi->reset_gpio)
+ gpiod_set_value(jdi->reset_gpio, 0);
+
+ if (jdi->enable_gpio)
+ gpiod_set_value(jdi->enable_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 regulator_bulk_data *s = jdi->supplies;
+ int num = PANEL_DEV_REGULATOR_MAX;
+ struct device *dev = &jdi->dsi->dev;
+ int ret;
+
+ if (jdi->prepared)
+ return 0;
+
+ DRM_DEBUG("prepare\n");
+
+ ret = regulator_bulk_enable(num, s);
+ if (ret < 0) {
+ dev_err(dev, "regulator enable failed, %d\n", ret);
+ return ret;
+ }
+
+ msleep(20);
+
+ if (jdi->reset_gpio) {
+ gpiod_set_value(jdi->reset_gpio, 1);
+ usleep_range(10, 20);
+ }
+
+ if (jdi->enable_gpio) {
+ gpiod_set_value(jdi->enable_gpio, 1);
+ usleep_range(10, 20);
+ }
+
+ ret = jdi_panel_init(jdi);
+ if (ret) {
+ dev_err(panel->dev, "failed to init panel: %d\n", ret);
+ goto poweroff;
+ }
+
+ ret = jdi_panel_on(jdi);
+ if (ret) {
+ dev_err(panel->dev, "failed to set panel on: %d\n", ret);
+ goto poweroff;
+ }
+
+ jdi->prepared = true;
+
+ return 0;
+
+poweroff:
+ if (jdi->reset_gpio)
+ gpiod_set_value(jdi->reset_gpio, 0);
+ if (jdi->enable_gpio)
+ gpiod_set_value(jdi->enable_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;
+
+ DRM_DEBUG("enable\n");
+
+ if (jdi->backlight) {
+ 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,
+ .width_mm = 95,
+ .height_mm = 151,
+};
+
+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);
+
+ 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;
+ u8 bl_value[2];
+
+ 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;
+
+ bl_value[0] = brightness & 0xff;
+ bl_value[1] = brightness >> 8;
+
+ return bl_value[0];
+}
+
+static int dsi_dcs_bl_update_status(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_set_display_brightness(dsi, 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,
+};
+
+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 = PANEL_MAX_BRIGHTNESS;
+ props.max_brightness = PANEL_MAX_BRIGHTNESS;
+
+ 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;
+ struct regulator_bulk_data *s = jdi->supplies;
+ int num = PANEL_DEV_REGULATOR_MAX;
+ int i, ret;
+
+ jdi->mode = &default_mode;
+
+ for (i = 0; i < num; i++)
+ s[i].supply = regs[i];
+
+ ret = devm_regulator_bulk_get(dev, num, s);
+ if (ret < 0) {
+ dev_err(dev, "%s: failed to init regulator, ret=%d\n",
+ __func__, ret);
+ return ret;
+ }
+
+ jdi->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
+ if (IS_ERR(jdi->reset_gpio)) {
+ dev_err(dev, "cannot get reset-gpios %ld\n",
+ PTR_ERR(jdi->reset_gpio));
+ jdi->reset_gpio = NULL;
+ } else {
+ gpiod_direction_output(jdi->reset_gpio, 0);
+ }
+
+ jdi->enable_gpio = devm_gpiod_get(dev, "enable", GPIOD_OUT_LOW);
+ if (IS_ERR(jdi->enable_gpio)) {
+ dev_err(dev, "cannot get enable-gpio %ld\n",
+ PTR_ERR(jdi->enable_gpio));
+ jdi->enable_gpio = NULL;
+ } else {
+ gpiod_direction_output(jdi->enable_gpio, 0);
+ }
+
+ jdi->backlight = drm_panel_create_dsi_backlight(jdi->dsi);
+
+ drm_panel_init(&jdi->base);
+ jdi->base.funcs = &jdi_panel_funcs;
+ jdi->base.dev = &jdi->dsi->dev;
+
+ ret = drm_panel_add(&jdi->base);
+ if (ret < 0)
+ return ret;
+
+ 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;
+
+ 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 <sumit.semwal@xxxxxxxxxx>");
+MODULE_AUTHOR("Vinay Simha BN <simhavcs@xxxxxxxxx>");
+MODULE_DESCRIPTION("JDI WUXGA LT070ME05000 DSI video mode panel driver");
+MODULE_LICENSE("GPL v2");
--
2.1.2
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