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 <arch...@codeaurora.org>
Signed-off-by: Abhinav Kumar <abhin...@codeaurora.org>
---
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");
--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project
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