1 files changed, 451 insertions, 0 deletions
diff --git a/drivers/gpu/drm/panel/panel-starfive-10inch.c b/drivers/gpu/drm/panel/panel-starfive-10inch.c
new file mode 100644
index 000000000000..c84f6a043538
--- /dev/null
+++ b/drivers/gpu/drm/panel/panel-starfive-10inch.c
@@ -0,0 +1,451 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2019 Radxa Limited
+ * Copyright (c) 2022 Edgeble AI Technologies Pvt. Ltd.
+ *
+ * Author:
+ * - keith <keith.zhao@starfivetech.com>
+ */
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_modes.h>
+#include <drm/drm_panel.h>
+#include <drm/drm_print.h>
+ 
+#include <linux/gpio/consumer.h>
+#include <linux/delay.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/regulator/consumer.h>
+ 
+#include <linux/device.h>
+#include <linux/i2c.h>
+#include <linux/kernel.h>
+#include <linux/of.h>
+#include <linux/of_graph.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_device.h>
+#include <video/display_timing.h>
+#include <video/videomode.h>
+ 
+#define DSI_DRIVER_NAME "starfive-raxda"
+#define GPIO_PANEL
+enum cmd_type {
+	 CMD_TYPE_DCS,
+	 CMD_TYPE_DELAY,
+};
+
+struct starfive_init_cmd {
+	 enum cmd_type type;
+	 const char *data;
+	 size_t len;
+};
+
+#define _INIT_CMD_DCS(...)					\
+	 {							 \
+		 .type	 = CMD_TYPE_DCS,			 \
+		 .data	 = (char[]){__VA_ARGS__},		 \
+		 .len	 = sizeof((char[]){__VA_ARGS__})	 \
+	 }							 \
+
+#define _INIT_CMD_DELAY(...)					\
+	 {							 \
+		 .type	 = CMD_TYPE_DELAY,			 \
+		 .data	 = (char[]){__VA_ARGS__},		 \
+		 .len	 = sizeof((char[]){__VA_ARGS__})	 \
+	 }							 \
+
+struct starfive_panel_desc {
+	 const struct drm_display_mode mode;
+	 unsigned int lanes;
+	 enum mipi_dsi_pixel_format format;
+	 const struct starfive_init_cmd *init_cmds;
+	 u32 num_init_cmds;
+	 const struct display_timing *timings;
+	 unsigned int num_timings;
+};
+ 
+struct starfive {
+	struct drm_panel panel;
+	struct mipi_dsi_device *dsi;
+	const struct starfive_panel_desc *desc;
+	struct i2c_client *client;
+
+	struct device	 *dev;
+
+	struct regulator *vdd;
+	struct regulator *vccio;
+
+	struct gpio_desc *reset;
+	struct gpio_desc *enable;
+
+
+	bool enable_initialized;
+};
+ 
+static inline struct starfive *panel_to_starfive(struct drm_panel *panel)
+{
+	 return container_of(panel, struct starfive, panel);
+}
+
+static int starfive_enable(struct drm_panel *panel)
+{
+	struct starfive *starfive = panel_to_starfive(panel);
+
+	if (starfive->enable_initialized == true)
+		return 0;
+
+	starfive->enable_initialized = true ;
+
+    
+	return 0;
+}
+
+static int starfive_disable(struct drm_panel *panel)
+{
+	 struct starfive *starfive = panel_to_starfive(panel);
+
+	 starfive->enable_initialized = false;
+
+	 return 0;
+}
+
+static int starfive_prepare(struct drm_panel *panel)
+{
+	struct device *dev = panel->dev;
+	struct starfive *starfive = panel_to_starfive(panel);
+	struct mipi_dsi_device *dsi = starfive->dsi;
+	unsigned int i;
+	int err;
+
+	if (starfive->enable_initialized == true)
+		return 0;
+
+
+	gpiod_direction_output(starfive->enable, 0);
+	gpiod_set_value(starfive->enable, 1);
+	mdelay(100);
+
+	gpiod_direction_output(starfive->reset, 0);
+	mdelay(100);
+	gpiod_set_value(starfive->reset, 1);
+	mdelay(100);
+	gpiod_set_value(starfive->reset, 0);
+	mdelay(100);
+	gpiod_set_value(starfive->reset, 1);
+	mdelay(150);
+
+	 return 0;
+}
+
+static int starfive_unprepare(struct drm_panel *panel)
+{
+	
+	struct starfive *starfive = panel_to_starfive(panel);
+	gpiod_set_value(starfive->reset, 1);
+	msleep(120);
+	 return 0;
+}
+
+static int starfive_get_modes(struct drm_panel *panel,
+				 struct drm_connector *connector)
+{
+	 struct starfive *starfive = panel_to_starfive(panel);
+	 const struct drm_display_mode *desc_mode = &starfive->desc->mode;
+	 struct drm_display_mode *mode;
+
+	 mode = drm_mode_duplicate(connector->dev, desc_mode);
+	 if (!mode) {
+		 DRM_DEV_ERROR(&starfive->dsi->dev, "failed to add mode %ux%ux@%u\n",
+				   desc_mode->hdisplay, desc_mode->vdisplay,
+				   drm_mode_vrefresh(desc_mode));
+		 return -ENOMEM;
+	 }
+
+	 drm_mode_set_name(mode);
+	 drm_mode_probed_add(connector, mode);
+
+	 connector->display_info.width_mm = mode->width_mm;
+	 connector->display_info.height_mm = mode->height_mm;
+
+	 return 1;
+}
+
+static int seiko_panel_get_timings(struct drm_panel *panel,
+					 unsigned int num_timings,
+					 struct display_timing *timings)
+{
+	 struct starfive *starfive = panel_to_starfive(panel);
+	 unsigned int i;
+
+	 if (starfive->desc->num_timings < num_timings)
+		 num_timings = starfive->desc->num_timings;
+
+	 if (timings)
+		 for (i = 0; i < num_timings; i++)
+			 timings[i] = starfive->desc->timings[i];
+
+	 return starfive->desc->num_timings;
+}
+
+static const struct drm_panel_funcs starfive_funcs = {
+	 .disable = starfive_disable,
+	 .unprepare = starfive_unprepare,
+	 .prepare = starfive_prepare,
+	 .enable = starfive_enable,
+	 .get_modes = starfive_get_modes,
+	 .get_timings = seiko_panel_get_timings,
+};
+
+static const struct display_timing starfive_timing = {
+	 .pixelclock = { 148500000, 148500000, 148500000 },
+	 .hactive = { 1200, 1200, 1200 },
+	 .hfront_porch = {	246, 246, 246 },
+	 .hback_porch = { 5, 5, 5 },
+	 .hsync_len = { 5, 5, 5 },
+	 .vactive = { 1920, 1920, 1920 },
+	 .vfront_porch = { 84, 84, 84 },
+	 .vback_porch = { 20, 20, 20 },
+	 .vsync_len = { 16, 16, 16 },
+	 .flags = DISPLAY_FLAGS_DE_LOW,
+};
+
+static const struct starfive_panel_desc cz101b4001_desc = {
+	 .mode = {
+		 .clock 	 = 148500,
+
+		 .hdisplay	 = 1200,
+		 .hsync_start	 = 1200 + 246,
+		 .hsync_end  = 1200 + 246 + 5,
+		 .htotal	 = 1200 + 246 + 5 + 5,
+
+		 .vdisplay	 = 1920,
+		 .vsync_start	 = 1920 + 84,
+		 .vsync_end  = 1920 + 84 + 20,
+		 .vtotal	 = 1920 + 84+ 20 + 16,
+
+		 .width_mm	 = 62,
+		 .height_mm  = 110,
+		 .type		 = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
+	 },
+	 .lanes = 4,
+	 .format = MIPI_DSI_FMT_RGB888,
+	 //.init_cmds = cz101b4001_init_cmds,
+	 //.num_init_cmds = ARRAY_SIZE(cz101b4001_init_cmds),
+	 .timings = &starfive_timing,
+	 .num_timings = 1,
+};
+
+static int panel_probe(struct i2c_client *client, const struct i2c_device_id *id)
+{
+	struct starfive *jd_panel;
+	const struct starfive_panel_desc *desc;
+	int err; u8 mode = 1;
+
+	struct device_node *endpoint, *dsi_host_node;
+	struct mipi_dsi_host *host;
+	struct device *dev = &client->dev;
+	struct mipi_dsi_device_info info = {
+		.type = DSI_DRIVER_NAME,
+		.channel = 1, //0,
+		.node = NULL,
+	};
+
+	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
+		dev_warn(&client->dev,
+			"I2C adapter doesn't support I2C_FUNC_SMBUS_BYTE\n");
+		return -EIO;
+	}
+
+	jd_panel = devm_kzalloc(&client->dev, sizeof(struct starfive), GFP_KERNEL);
+	if (!jd_panel )
+	 return -ENOMEM;
+	desc = of_device_get_match_data(dev);
+
+	jd_panel ->client = client;
+	i2c_set_clientdata(client, jd_panel);
+
+	jd_panel->enable_initialized = false;
+
+	jd_panel->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
+	if (IS_ERR(jd_panel->reset)) {
+		DRM_DEV_ERROR(dev, "failed to get our reset GPIO\n");
+		return PTR_ERR(jd_panel->reset);
+	}
+
+	jd_panel->enable = devm_gpiod_get(dev, "enable", GPIOD_OUT_LOW);
+	if (IS_ERR(jd_panel->enable)) {
+		DRM_DEV_ERROR(dev, "failed to get our enable GPIO\n");
+		return PTR_ERR(jd_panel->enable);
+	}
+
+	endpoint = of_graph_get_next_endpoint(dev->of_node, NULL);
+	if (!endpoint)
+	 	return -ENODEV;
+
+	dsi_host_node = of_graph_get_remote_port_parent(endpoint);
+	if (!dsi_host_node)
+	 goto error;
+
+	host = of_find_mipi_dsi_host_by_node(dsi_host_node);
+	of_node_put(dsi_host_node);
+	if (!host) {
+		of_node_put(endpoint);
+		return -EPROBE_DEFER;
+	}
+
+	drm_panel_init(&jd_panel->panel, dev, &starfive_funcs,
+			DRM_MODE_CONNECTOR_DSI);
+
+	drm_panel_add(&jd_panel->panel);
+
+	info.node = of_node_get(of_graph_get_remote_port(endpoint));
+	if (!info.node)
+		goto error;
+
+	of_node_put(endpoint);
+	jd_panel->desc = desc;
+
+	jd_panel->dsi = mipi_dsi_device_register_full(host, &info);
+	if (IS_ERR(jd_panel->dsi)) {
+		dev_err(dev, "DSI device registration failed: %ld\n",
+			PTR_ERR(jd_panel->dsi));
+		return PTR_ERR(jd_panel->dsi);
+	}
+
+	mipi_dsi_set_drvdata(jd_panel->dsi, jd_panel);
+
+	gpiod_direction_output(jd_panel->enable, 0);
+	gpiod_set_value(jd_panel->enable, 1);
+	mdelay(100);
+
+	gpiod_direction_output(jd_panel->reset, 0);
+	mdelay(100);
+	gpiod_set_value(jd_panel->reset, 1);
+	mdelay(100);
+	gpiod_set_value(jd_panel->reset, 0);
+	mdelay(100);
+	gpiod_set_value(jd_panel->reset, 1);
+	mdelay(150);
+
+	jd_panel->dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
+	if(jd_panel->dsi)
+	{
+		//use this command to detect the connected status
+		err = mipi_dsi_dcs_get_power_mode(jd_panel->dsi, &mode);
+		dev_info(dev,"dsi command return %d, mode %d\n", err, mode);
+		if(err == -EIO)
+	  		dev_info(dev, "raxda 10 inch detected\n");
+		else
+			goto no_panel;
+	}
+	jd_panel->dsi->mode_flags |= MIPI_DSI_MODE_LPM;
+
+	return 0;
+error:
+	of_node_put(endpoint);
+	return -ENODEV;
+no_panel:
+	drm_panel_remove(&jd_panel->panel);
+	mipi_dsi_device_unregister(jd_panel->dsi);
+
+	return -ENODEV;
+
+}
+
+static int panel_remove(struct i2c_client *client)
+{
+	 struct starfive *jd_panel = i2c_get_clientdata(client);
+
+	 mipi_dsi_detach(jd_panel->dsi);
+	 drm_panel_remove(&jd_panel->panel);
+	 mipi_dsi_device_unregister(jd_panel->dsi);
+	 return 0;
+}
+
+static const struct i2c_device_id panel_id[] = {
+	 { "panel_10inch", 0 },
+	 { }
+};
+
+static const struct of_device_id panel_dt_ids[] = {
+	 { .compatible = "panel_10inch", .data = &cz101b4001_desc},
+	 { /* sentinel */ }
+};
+
+static struct i2c_driver panel_driver_raxda_10inch = {
+	 .driver = {
+		 .owner  = THIS_MODULE,
+		 .name	 = "starfive_raxda_10inch",
+		 .of_match_table = panel_dt_ids,
+	 },
+	 .probe 	 = panel_probe,
+	 .remove	 = panel_remove,
+	 .id_table	 = panel_id,
+};
+
+static int starfive_dsi_probe(struct mipi_dsi_device *dsi)
+{
+	 int ret;
+
+	 dsi->mode_flags = MIPI_DSI_MODE_LPM | MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE ;
+	 dsi->format = MIPI_DSI_FMT_RGB888;
+	 dsi->lanes = 4;
+	 dsi->channel = 1;
+	 dsi->hs_rate = 980000000;
+
+	 ret = mipi_dsi_attach(dsi);
+	 if (ret < 0) {
+		 return ret;
+	 }
+
+	 return 0;
+}
+
+static int starfive_dsi_remove(struct mipi_dsi_device *dsi)
+{
+	 struct starfive *starfive = mipi_dsi_get_drvdata(dsi);
+
+	 mipi_dsi_detach(dsi);
+	 drm_panel_remove(&starfive->panel);
+
+	 return 0;
+}
+
+static const struct of_device_id starfive_of_match[] = {
+	 { .compatible = "starfive-raxda-10inch-2", .data = &cz101b4001_desc },
+	 { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, starfive_of_match);
+
+static struct mipi_dsi_driver starfive_mipi_driver = {
+	 .probe = starfive_dsi_probe,
+	 .remove = starfive_dsi_remove,
+	 .driver.name = DSI_DRIVER_NAME,
+};
+
+static int __init init_panel(void)
+{
+	 int err;
+
+	 mipi_dsi_driver_register(&starfive_mipi_driver);
+	 err = i2c_add_driver(&panel_driver_raxda_10inch);
+
+	 return err;
+
+}
+late_initcall(init_panel);
+
+static void __exit exit_panel(void)
+{
+	 i2c_del_driver(&panel_driver_raxda_10inch);
+	 mipi_dsi_driver_unregister(&starfive_mipi_driver);
+}
+module_exit(exit_panel);
+
+
+MODULE_AUTHOR("keith <keithzhao@starfivetech.com>");
+MODULE_DESCRIPTION("10inch DSI panel");
+MODULE_LICENSE("GPL");
+
+
+