Add support for Truly NT35597 panel used
in MSM reference platforms.
This panel supports both single DSI and dual DSI
modes.
However, this patch series adds support only for
dual DSI mode.
Changes in v3:
- Changes to commit text
- Separated the documentation from the driver itself
- Improved the documentation to cover the port information
- Formatting fixes and changes in delays in panel sequences
- Cleaned up probe function
Signed-off-by: Archit Taneja <architt@xxxxxxxxxxxxxx>
Signed-off-by: Abhinav Kumar <abhinavk@xxxxxxxxxxxxxx>
---
drivers/gpu/drm/panel/Kconfig | 8 +
drivers/gpu/drm/panel/Makefile | 1 +
drivers/gpu/drm/panel/panel-truly-nt35597.c | 588 ++++++++++++++++++++++++++++
3 files changed, 597 insertions(+)
create mode 100644 drivers/gpu/drm/panel/panel-truly-nt35597.c
diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
index 25682ff..2fcd9b1 100644
--- a/drivers/gpu/drm/panel/Kconfig
+++ b/drivers/gpu/drm/panel/Kconfig
@@ -177,4 +177,12 @@ config DRM_PANEL_SITRONIX_ST7789V
Say Y here if you want to enable support for the Sitronix
ST7789V controller for 240x320 LCD panels
+config DRM_PANEL_TRULY_NT35597_WQXGA
+ tristate "Truly WQXGA"
+ depends on OF
+ depends on DRM_MIPI_DSI
+ select VIDEOMODE_HELPERS
+ help
+ Say Y here if you want to enable support for Truly NT35597 WQXGA Dual DSI
+ Video Mode panel
endmenu
diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile
index f26efc1..056ea93 100644
--- a/drivers/gpu/drm/panel/Makefile
+++ b/drivers/gpu/drm/panel/Makefile
@@ -18,3 +18,4 @@ obj-$(CONFIG_DRM_PANEL_SEIKO_43WVF1G) += panel-seiko-43wvf1g.o
obj-$(CONFIG_DRM_PANEL_SHARP_LQ101R1SX01) += panel-sharp-lq101r1sx01.o
obj-$(CONFIG_DRM_PANEL_SHARP_LS043T1LE01) += panel-sharp-ls043t1le01.o
obj-$(CONFIG_DRM_PANEL_SITRONIX_ST7789V) += panel-sitronix-st7789v.o
+obj-$(CONFIG_DRM_PANEL_TRULY_NT35597_WQXGA) += panel-truly-nt35597.o
diff --git a/drivers/gpu/drm/panel/panel-truly-nt35597.c b/drivers/gpu/drm/panel/panel-truly-nt35597.c
new file mode 100644
index 0000000..529086b
--- /dev/null
+++ b/drivers/gpu/drm/panel/panel-truly-nt35597.c
@@ -0,0 +1,588 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (c) 2018, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only 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.
+ *
+ */
+
+#include <linux/gpio/consumer.h>
+#include <linux/of_graph.h>
+#include <linux/regulator/consumer.h>
+#include <linux/pinctrl/consumer.h>
+
+#include <video/mipi_display.h>
+#include <video/of_videomode.h>
+#include <video/videomode.h>
+
+#include <drm/drmP.h>
+#include <drm/drm_panel.h>
+#include <drm/drm_mipi_dsi.h>
+
+static const char * const regulator_names[] = {
+ "vdda",
+ "vdispp",
+ "vdispn"
+};
+
+static unsigned long regulator_enable_loads[] = {
+ 62000,
+ 100000,
+ 100000
+};
+
+static unsigned long regulator_disable_loads[] = {
+ 80,
+ 100,
+ 100
+};
+
+struct truly_wqxga {
+ struct device *dev;
+ struct drm_panel panel;
+
+ struct regulator_bulk_data supplies[ARRAY_SIZE(regulator_names)];
+
+ struct gpio_desc *reset_gpio;
+ struct gpio_desc *mode_gpio;
+
+ struct backlight_device *backlight;
+ struct videomode vm;
+
+ struct mipi_dsi_device *dsi[2];
+
+ bool prepared;
+ bool enabled;
+};
+
+static inline struct truly_wqxga *panel_to_truly_wqxga(struct drm_panel *panel)
+{
+ return container_of(panel, struct truly_wqxga, panel);
+}
+
+static int truly_wqxga_power_on(struct truly_wqxga *ctx)
+{
+ int ret, i;
+
+ for (i = 0; i < ARRAY_SIZE(ctx->supplies); i++) {
+ ret = regulator_set_load(ctx->supplies[i].consumer,
+ regulator_enable_loads[i]);
+ if (ret)
+ return ret;
+ }
+
+ ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
+ if (ret < 0)
+ return ret;
+
+ msleep(20);
+ gpiod_set_value(ctx->reset_gpio, 1);
+ msleep(20);
+ gpiod_set_value(ctx->reset_gpio, 0);
+ msleep(20);
+ gpiod_set_value(ctx->reset_gpio, 1);
+ msleep(50);
+
+ return 0;
+}
+
+static int truly_wqxga_power_off(struct truly_wqxga *ctx)
+{
+ int ret, i;
+
+ gpiod_set_value(ctx->reset_gpio, 0);
+
+ for (i = 0; i < ARRAY_SIZE(ctx->supplies); i++) {
+ ret = regulator_set_load(ctx->supplies[i].consumer,
+ regulator_disable_loads[i]);
+ if (ret)
+ return ret;
+ }
+
+ return regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
+}
+
+static int truly_wqxga_disable(struct drm_panel *panel)
+{
+ struct truly_wqxga *ctx = panel_to_truly_wqxga(panel);
+
+ if (!ctx->enabled)
+ return 0;
+
+ if (ctx->backlight) {
+ ctx->backlight->props.power = FB_BLANK_POWERDOWN;
+ backlight_update_status(ctx->backlight);
+ }
+
+ ctx->enabled = false;
+ return 0;
+}
+
+static int truly_wqxga_unprepare(struct drm_panel *panel)
+{
+ struct truly_wqxga *ctx = panel_to_truly_wqxga(panel);
+ struct mipi_dsi_device **dsis = ctx->dsi;
+ int ret = 0, i;
+
+ if (!ctx->prepared)
+ return 0;
+
+ dsis[0]->mode_flags = 0;
+ dsis[1]->mode_flags = 0;
+
+ for (i = 0; i < 2; i++)
+ if (mipi_dsi_dcs_set_display_off(dsis[i]) < 0)
+ ret = -ECOMM;
+
+ msleep(120);
+
+ for (i = 0; i < 2; i++)
+ if (mipi_dsi_dcs_enter_sleep_mode(dsis[i]) < 0)
+ ret = -ECOMM;
+
+ truly_wqxga_power_off(ctx);
+
+ ctx->prepared = false;
+ return ret;
+}
+
+#define MAX_LEN 5
+struct {
+ u8 commands[MAX_LEN];
+ int size;
+} panel_cmds[] = { /* CMD2_P0 */
+ { { 0xff, 0x20 }, 2 },
+ { { 0xfb, 0x01 }, 2 },
+ { { 0x00, 0x01 }, 2 },
+ { { 0x01, 0x55 }, 2 },
+ { { 0x02, 0x45 }, 2 },
+ { { 0x05, 0x40 }, 2 },
+ { { 0x06, 0x19 }, 2 },
+ { { 0x07, 0x1e }, 2 },
+ { { 0x0b, 0x73 }, 2 },
+ { { 0x0c, 0x73 }, 2 },
+ { { 0x0e, 0xb0 }, 2 },
+ { { 0x0f, 0xae }, 2 },
+ { { 0x11, 0xb8 }, 2 },
+ { { 0x13, 0x00 }, 2 },
+ { { 0x58, 0x80 }, 2 },
+ { { 0x59, 0x01 }, 2 },
+ { { 0x5a, 0x00 }, 2 },
+ { { 0x5b, 0x01 }, 2 },
+ { { 0x5c, 0x80 }, 2 },
+ { { 0x5d, 0x81 }, 2 },
+ { { 0x5e, 0x00 }, 2 },
+ { { 0x5f, 0x01 }, 2 },
+ { { 0x72, 0x11 }, 2 },
+ { { 0x68, 0x03 }, 2 },
+ /* CMD2_P4 */
+ { { 0xFF, 0x24 }, 2 },
+ { { 0xFB, 0x01 }, 2 },
+ { { 0x00, 0x1C }, 2 },
+ { { 0x01, 0x0B }, 2 },
+ { { 0x02, 0x0C }, 2 },
+ { { 0x03, 0x01 }, 2 },
+ { { 0x04, 0x0F }, 2 },
+ { { 0x05, 0x10 }, 2 },
+ { { 0x06, 0x10 }, 2 },
+ { { 0x07, 0x10 }, 2 },
+ { { 0x08, 0x89 }, 2 },
+ { { 0x09, 0x8A }, 2 },
+ { { 0x0A, 0x13 }, 2 },
+ { { 0x0B, 0x13 }, 2 },
+ { { 0x0C, 0x15 }, 2 },
+ { { 0x0D, 0x15 }, 2 },
+ { { 0x0E, 0x17 }, 2 },
+ { { 0x0F, 0x17 }, 2 },
+ { { 0x10, 0x1C }, 2 },
+ { { 0x11, 0x0B }, 2 },
+ { { 0x12, 0x0C }, 2 },
+ { { 0x13, 0x01 }, 2 },
+ { { 0x14, 0x0F }, 2 },
+ { { 0x15, 0x10 }, 2 },
+ { { 0x16, 0x10 }, 2 },
+ { { 0x17, 0x10 }, 2 },
+ { { 0x18, 0x89 }, 2 },
+ { { 0x19, 0x8A }, 2 },
+ { { 0x1A, 0x13 }, 2 },
+ { { 0x1B, 0x13 }, 2 },
+ { { 0x1C, 0x15 }, 2 },
+ { { 0x1D, 0x15 }, 2 },
+ { { 0x1E, 0x17 }, 2 },
+ { { 0x1F, 0x17 }, 2 },
+ /* STV */
+ { { 0x20, 0x40 }, 2 },
+ { { 0x21, 0x01 }, 2 },
+ { { 0x22, 0x00 }, 2 },
+ { { 0x23, 0x40 }, 2 },
+ { { 0x24, 0x40 }, 2 },
+ { { 0x25, 0x6D }, 2 },
+ { { 0x26, 0x40 }, 2 },
+ { { 0x27, 0x40 }, 2 },
+ /* Vend */
+ { { 0xE0, 0x00 }, 2 },
+ { { 0xDC, 0x21 }, 2 },
+ { { 0xDD, 0x22 }, 2 },
+ { { 0xDE, 0x07 }, 2 },
+ { { 0xDF, 0x07 }, 2 },
+ { { 0xE3, 0x6D }, 2 },
+ { { 0xE1, 0x07 }, 2 },
+ { { 0xE2, 0x07 }, 2 },
+ /* UD */
+ { { 0x29, 0xD8 }, 2 },
+ { { 0x2A, 0x2A }, 2 },
+ /* CLK */
+ { { 0x4B, 0x03 }, 2 },
+ { { 0x4C, 0x11 }, 2 },
+ { { 0x4D, 0x10 }, 2 },
+ { { 0x4E, 0x01 }, 2 },
+ { { 0x4F, 0x01 }, 2 },
+ { { 0x50, 0x10 }, 2 },
+ { { 0x51, 0x00 }, 2 },
+ { { 0x52, 0x80 }, 2 },
+ { { 0x53, 0x00 }, 2 },
+ { { 0x56, 0x00 }, 2 },
+ { { 0x54, 0x07 }, 2 },
+ { { 0x58, 0x07 }, 2 },
+ { { 0x55, 0x25 }, 2 },
+ /* Reset XDONB */
+ { { 0x5B, 0x43 }, 2 },
+ { { 0x5C, 0x00 }, 2 },
+ { { 0x5F, 0x73 }, 2 },
+ { { 0x60, 0x73 }, 2 },
+ { { 0x63, 0x22 }, 2 },
+ { { 0x64, 0x00 }, 2 },
+ { { 0x67, 0x08 }, 2 },
+ { { 0x68, 0x04 }, 2 },
+ /* Resolution:1440x2560 */
+ { { 0x72, 0x02 }, 2 },
+ /* mux */
+ { { 0x7A, 0x80 }, 2 },
+ { { 0x7B, 0x91 }, 2 },
+ { { 0x7C, 0xD8 }, 2 },
+ { { 0x7D, 0x60 }, 2 },
+ { { 0x7F, 0x15 }, 2 },
+ { { 0x75, 0x15 }, 2 },
+ /* ABOFF */
+ { { 0xB3, 0xC0 }, 2 },
+ { { 0xB4, 0x00 }, 2 },
+ { { 0xB5, 0x00 }, 2 },
+ /* Source EQ */
+ { { 0x78, 0x00 }, 2 },
+ { { 0x79, 0x00 }, 2 },
+ { { 0x80, 0x00 }, 2 },
+ { { 0x83, 0x00 }, 2 },
+ /* FP BP */
+ { { 0x93, 0x0A }, 2 },
+ { { 0x94, 0x0A }, 2 },
+ /* Inversion Type */
+ { { 0x8A, 0x00 }, 2 },
+ { { 0x9B, 0xFF }, 2 },
+ /* IMGSWAP =1 @PortSwap=1 */
+ { { 0x9D, 0xB0 }, 2 },
+ { { 0x9F, 0x63 }, 2 },
+ { { 0x98, 0x10 }, 2 },
+ /* FRM */
+ { { 0xEC, 0x00 }, 2 },
+ /* CMD1 */
+ { { 0xFF, 0x10 }, 2 },
+ /* VBP+VSA=,VFP = 10H */
+ { { 0x3B, 0x03, 0x0A, 0x0A, }, 4 },
+ /* FTE on */
+ { { 0x35, 0x00 }, 2 },
+ /* EN_BK =1(auto black) */
+ { { 0xE5, 0x01 }, 2 },
+ /* CMD mode(10) VDO mode(03) */
+ { { 0xBB, 0x03 }, 2 },
+ /* Non Reload MTP */
+ { { 0xFB, 0x01 }, 2 },
+};
+
+static int truly_wqxga_prepare(struct drm_panel *panel)
+{
+ struct truly_wqxga *ctx = panel_to_truly_wqxga(panel);
+ struct mipi_dsi_device **dsis = ctx->dsi;
+ struct mipi_dsi_device *d;
+ int ret, i, j;
+
+ if (ctx->prepared)
+ return 0;
+
+ ret = truly_wqxga_power_on(ctx);
+ if (ret < 0)
+ return ret;
+
+ dsis[0]->mode_flags |= MIPI_DSI_MODE_LPM;
+ dsis[1]->mode_flags |= MIPI_DSI_MODE_LPM;
+
+ for (j = 0; j < ARRAY_SIZE(panel_cmds); j++) {
+ for (i = 0; i < 2; i++) {
+ d = dsis[i];
+ ret = mipi_dsi_dcs_write_buffer(dsis[i],
+ panel_cmds[j].commands,
+ panel_cmds[j].size);
+ if (ret < 0) {
+ dev_err(ctx->dev, "failed to cmd no %d, err: %d\n",
+ j, ret);
+ return ret;
+ }
+ }
+ }
+
+ for (i = 0; i < 2; i++)
+ if (mipi_dsi_dcs_exit_sleep_mode(dsis[i]) < 0) {
+ dev_err(ctx->dev, "failed to exit sleep mode\n");
+ return -ECOMM;
+ }
+ msleep(78);
+
+ for (i = 0; i < 2; i++)
+ if (mipi_dsi_dcs_set_display_on(dsis[i]) < 0) {
+ dev_err(ctx->dev, "failed to send display on\n");
+ return -ECOMM;
+ }
+ msleep(78);
+
+ ctx->prepared = true;
+
+ return 0;
+}
+
+static int truly_wqxga_enable(struct drm_panel *panel)
+{
+ struct truly_wqxga *ctx = panel_to_truly_wqxga(panel);
+
+ if (ctx->enabled)
+ return 0;
+
+ if (ctx->backlight) {
+ ctx->backlight->props.power = FB_BLANK_UNBLANK;
+ backlight_update_status(ctx->backlight);
+ }
+ ctx->enabled = true;
+
+ return 0;
+}
+
+static int truly_wqxga_get_modes(struct drm_panel *panel)
+{
+ struct drm_connector *connector = panel->connector;
+ struct truly_wqxga *ctx = panel_to_truly_wqxga(panel);
+ struct drm_display_mode *mode;
+
+ mode = drm_mode_create(connector->dev);
+ if (!mode) {
+ dev_err(ctx->dev, "failed to create a new display mode\n");
+ return 0;
+ }
+
+ drm_display_mode_from_videomode(&ctx->vm, mode);
+ connector->display_info.width_mm = 74;
+ connector->display_info.height_mm = 131;
+ mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
+ drm_mode_probed_add(connector, mode);
+
+ return 1;
+}
+
+static const struct drm_panel_funcs truly_wqxga_drm_funcs = {
+ .disable = truly_wqxga_disable,
+ .unprepare = truly_wqxga_unprepare,
+ .prepare = truly_wqxga_prepare,
+ .enable = truly_wqxga_enable,
+ .get_modes = truly_wqxga_get_modes,
+};
+
+static int truly_wqxga_panel_add(struct truly_wqxga *ctx)
+{
+ struct device *dev = ctx->dev;
+ int ret, i;
+
+ for (i = 0; i < ARRAY_SIZE(ctx->supplies); i++)
+ ctx->supplies[i].supply = regulator_names[i];
+
+ ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ctx->supplies),
+ ctx->supplies);
+ if (ret < 0)
+ return ret;
+
+ ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
+ if (IS_ERR(ctx->reset_gpio)) {
+ dev_err(dev, "cannot get reset-gpios %ld\n",
+ PTR_ERR(ctx->reset_gpio));
+ return PTR_ERR(ctx->reset_gpio);
+ }
+
+ ctx->mode_gpio = devm_gpiod_get(dev, "mode", GPIOD_OUT_LOW);
+ if (IS_ERR(ctx->mode_gpio)) {
+ dev_err(dev, "cannot get mode gpio %ld\n",
+ PTR_ERR(ctx->mode_gpio));
+ ctx->mode_gpio = NULL;
+ return PTR_ERR(ctx->mode_gpio);
+ }
+
+ /* dual port */
+ gpiod_set_value(ctx->mode_gpio, 0);
+
+ ret = of_get_videomode(dev->of_node, &ctx->vm, 0);
+ if (ret < 0)
+ return ret;
+
+ drm_panel_init(&ctx->panel);
+ ctx->panel.dev = dev;
+ ctx->panel.funcs = &truly_wqxga_drm_funcs;
+ drm_panel_add(&ctx->panel);
+
+ return 0;
+}
+
+static void truly_wqxga_panel_del(struct truly_wqxga *ctx)
+{
+ if (ctx->panel.dev)
+ drm_panel_remove(&ctx->panel);
+}
+
+static int truly_wqxga_probe(struct mipi_dsi_device *dsi)
+{
+ struct device *dev = &dsi->dev;
+ struct truly_wqxga *ctx;
+ struct mipi_dsi_device *secondary;
+ struct device_node *dsi1;
+ struct mipi_dsi_host *dsi1_host;
+ int ret = 0;
+ const struct mipi_dsi_device_info info = {.type = "trulynt35597",
+ .channel = 0,
+ .node = NULL,
+ };
+
+ ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
+
+ if (!ctx) {
+ ret = -ENOMEM;
+ goto err_dsi_ctx;
+ }
+
+ /* This device represents itself as one with
+ * two input ports which are fed by the output
+ * ports of the two DSI controllers . The DSI0
+ * is the master controller and has most of the
+ * panel related info in its child node.
+ */
+
+ dsi1 = of_graph_get_remote_node(dsi->dev.of_node, 1, -1);
+ if (!dsi1) {
+ dev_err(dev, "failed to get remote node for secondary DSI\n");
+ ret = -ENODEV;
+ goto err_get_remote;
+ }
+
+ dsi1_host = of_find_mipi_dsi_host_by_node(dsi1);
+ if (!dsi1_host) {
+ dev_err(dev, "failed to find dsi host\n");
+ ret = -EPROBE_DEFER;
+ goto err_host;
+ }
+
+ of_node_put(dsi1);
+
+ /* register the second DSI device */
+ secondary = mipi_dsi_device_register_full(dsi1_host, &info);
+
+ if (IS_ERR(secondary)) {
+ dev_err(dev, "failed to create dsi device\n");
+ ret = PTR_ERR(dsi);
+ goto err_dsi_device;
+ }
+
+ mipi_dsi_set_drvdata(dsi, ctx);
+
+ ctx->dev = dev;
+ ctx->dsi[0] = dsi;
+ ctx->dsi[1] = secondary;
+
+ ret = truly_wqxga_panel_add(ctx);
+ if (ret) {
+ dev_err(dev, "failed to add panel\n");
+ goto err_panel_add;
+ }
+
+ /* configure master DSI device */
+ dsi->lanes = 4;
+ dsi->format = MIPI_DSI_FMT_RGB888;
+ dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_CLOCK_NON_CONTINUOUS |
+ MIPI_DSI_MODE_LPM;
+
+ ret = mipi_dsi_attach(dsi);
+ if (ret < 0) {
+ dev_err(dev, "master dsi attach failed\n");
+ goto err_dsi_attach;
+ }
+
+ /* configure secondary DSI device */
+ secondary->lanes = 4;
+ secondary->format = MIPI_DSI_FMT_RGB888;
+ secondary->mode_flags = MIPI_DSI_MODE_VIDEO |
+ MIPI_DSI_CLOCK_NON_CONTINUOUS |
+ MIPI_DSI_MODE_LPM;
+
+ ret = mipi_dsi_attach(secondary);
+ if (ret < 0) {
+ dev_err(dev, "mipi_dsi_attach on secondary failed\n");
+ goto err_dsi_attach_sec;
+ }
+
+ return 0;
+
+err_dsi_attach_sec:
+ mipi_dsi_detach(ctx->dsi[0]);
+err_dsi_attach:
+ truly_wqxga_panel_del(ctx);
+err_panel_add:
+ mipi_dsi_device_unregister(secondary);
+err_dsi_device:
+err_host:
+ of_node_put(dsi1);
+err_get_remote:
+err_dsi_ctx:
+ return ret;
+}
+
+static int truly_wqxga_remove(struct mipi_dsi_device *dsi)
+{
+ struct truly_wqxga *ctx = mipi_dsi_get_drvdata(dsi);
+
+ if (ctx->dsi[0])
+ mipi_dsi_detach(ctx->dsi[0]);
+ if (ctx->dsi[1]) {
+ mipi_dsi_detach(ctx->dsi[1]);
+ mipi_dsi_device_unregister(ctx->dsi[1]);
+ }
+ truly_wqxga_panel_del(ctx);
+
+ return 0;
+}
+
+static const struct of_device_id truly_wqxga_of_match[] = {
+ { .compatible = "truly,nt35597", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, truly_wqxga_of_match);
+
+static struct mipi_dsi_driver truly_wqxga_driver = {
+ .driver = {
+ .name = "panel_truly_nt35597",
+ .of_match_table = truly_wqxga_of_match,
+ },
+ .probe = truly_wqxga_probe,
+ .remove = truly_wqxga_remove,
+};
+module_mipi_dsi_driver(truly_wqxga_driver);
+
+MODULE_DESCRIPTION("Truly NT35597 DSI Panel Driver");
+MODULE_LICENSE("GPL v2");
--
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